| /******************************************************************************* |
| * Copyright (c) 2000, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.custom; |
| |
| |
| import java.util.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.accessibility.*; |
| import org.eclipse.swt.dnd.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.printing.*; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * A StyledText is an editable user interface object that displays lines |
| * of text. The following style attributes can be defined for the text: |
| * <ul> |
| * <li>foreground color |
| * <li>background color |
| * <li>font style (bold, italic, bold-italic, regular) |
| * <li>underline |
| * <li>strikeout |
| * </ul> |
| * <p> |
| * In addition to text style attributes, the background color of a line may |
| * be specified. |
| * </p><p> |
| * There are two ways to use this widget when specifying text style information. |
| * You may use the API that is defined for StyledText or you may define your own |
| * LineStyleListener. If you define your own listener, you will be responsible |
| * for maintaining the text style information for the widget. IMPORTANT: You may |
| * not define your own listener and use the StyledText API. The following |
| * StyledText API is not supported if you have defined a LineStyleListener: |
| * <ul> |
| * <li>getStyleRangeAtOffset(int) |
| * <li>getStyleRanges() |
| * <li>replaceStyleRanges(int,int,StyleRange[]) |
| * <li>setStyleRange(StyleRange) |
| * <li>setStyleRanges(StyleRange[]) |
| * </ul> |
| * </p><p> |
| * There are two ways to use this widget when specifying line background colors. |
| * You may use the API that is defined for StyledText or you may define your own |
| * LineBackgroundListener. If you define your own listener, you will be responsible |
| * for maintaining the line background color information for the widget. |
| * IMPORTANT: You may not define your own listener and use the StyledText API. |
| * The following StyledText API is not supported if you have defined a |
| * LineBackgroundListener: |
| * <ul> |
| * <li>getLineBackground(int) |
| * <li>setLineBackground(int,int,Color) |
| * </ul> |
| * </p><p> |
| * The content implementation for this widget may also be user-defined. To do so, |
| * you must implement the StyledTextContent interface and use the StyledText API |
| * setContent(StyledTextContent) to initialize the widget. |
| * </p><p> |
| * <dl> |
| * <dt><b>Styles:</b><dd>FULL_SELECTION, MULTI, READ_ONLY, SINGLE, WRAP |
| * <dt><b>Events:</b><dd>ExtendedModify, LineGetBackground, LineGetSegments, LineGetStyle, Modify, Selection, Verify, VerifyKey |
| * </dl> |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class StyledText extends Canvas { |
| static final char TAB = '\t'; |
| static final String PlatformLineDelimiter = System.getProperty("line.separator"); |
| static final int BIDI_CARET_WIDTH = 3; |
| static final int DEFAULT_WIDTH = 64; |
| static final int DEFAULT_HEIGHT = 64; |
| static final int V_SCROLL_RATE = 50; |
| static final int H_SCROLL_RATE = 10; |
| |
| static final int ExtendedModify = 3000; |
| static final int LineGetBackground = 3001; |
| static final int LineGetStyle = 3002; |
| static final int TextChanging = 3003; |
| static final int TextSet = 3004; |
| static final int VerifyKey = 3005; |
| static final int TextChanged = 3006; |
| static final int LineGetSegments = 3007; |
| static final int PaintObject = 3008; |
| |
| static final int PREVIOUS_OFFSET_TRAILING = 0; |
| static final int OFFSET_LEADING = 1; |
| |
| Color selectionBackground; // selection background color |
| Color selectionForeground; // selection foreground color |
| StyledTextContent content; // native content (default or user specified) |
| StyledTextRenderer renderer; |
| Listener listener; |
| TextChangeListener textChangeListener; // listener for TextChanging, TextChanged and TextSet events from StyledTextContent |
| int verticalScrollOffset = 0; // pixel based |
| int horizontalScrollOffset = 0; // pixel based |
| int topIndex = 0; // top visible line |
| int topIndexY; |
| int clientAreaHeight = 0; // the client area height. Needed to calculate content width for new visible lines during Resize callback |
| int clientAreaWidth = 0; // the client area width. Needed during Resize callback to determine if line wrap needs to be recalculated |
| int tabLength = 4; // number of characters in a tab |
| int leftMargin; |
| int topMargin; |
| int rightMargin; |
| int bottomMargin; |
| int columnX; // keep track of the horizontal caret position when changing lines/pages. Fixes bug 5935 |
| int caretOffset = 0; |
| int caretAlignment; |
| Point selection = new Point(0, 0); // x and y are start and end caret offsets of selection |
| Point clipboardSelection; // x and y are start and end caret offsets of previous selection |
| int selectionAnchor; // position of selection anchor. 0 based offset from beginning of text |
| Point doubleClickSelection; // selection after last mouse double click |
| boolean editable = true; |
| boolean wordWrap = false; |
| boolean doubleClickEnabled = true; // see getDoubleClickEnabled |
| boolean overwrite = false; // insert/overwrite edit mode |
| int textLimit = -1; // limits the number of characters the user can type in the widget. Unlimited by default. |
| Hashtable keyActionMap = new Hashtable(); |
| Color background = null; // workaround for bug 4791 |
| Color foreground = null; // |
| Clipboard clipboard; |
| boolean mouseDown = false; |
| boolean mouseDoubleClick = false; // true=a double click ocurred. Don't do mouse swipe selection. |
| int autoScrollDirection = SWT.NULL; // the direction of autoscrolling (up, down, right, left) |
| int autoScrollDistance = 0; |
| int lastTextChangeStart; // cache data of the |
| int lastTextChangeNewLineCount; // last text changing |
| int lastTextChangeNewCharCount; // event for use in the |
| int lastTextChangeReplaceLineCount; // text changed handler |
| int lastTextChangeReplaceCharCount; |
| int lastLineBottom; // the bottom pixel of the last line been replaced |
| boolean isMirrored; |
| boolean bidiColoring = false; // apply the BIDI algorithm on text segments of the same color |
| Image leftCaretBitmap = null; |
| Image rightCaretBitmap = null; |
| int caretDirection = SWT.NULL; |
| Caret defaultCaret = null; |
| boolean updateCaretDirection = true; |
| boolean fixedLineHeight; |
| boolean dragDetect, dragging; |
| |
| int alignment; |
| boolean justify; |
| int indent; |
| int lineSpacing; |
| |
| final static boolean IS_CARBON, IS_GTK, IS_MOTIF; |
| static { |
| String platform = SWT.getPlatform(); |
| IS_CARBON = "carbon".equals(platform); |
| IS_GTK = "gtk".equals(platform); |
| IS_MOTIF = "motif".equals(platform); |
| } |
| |
| /** |
| * The Printing class implements printing of a range of text. |
| * An instance of <class>Printing </class> is returned in the |
| * StyledText#print(Printer) API. The run() method may be |
| * invoked from any thread. |
| */ |
| static class Printing implements Runnable { |
| final static int LEFT = 0; // left aligned header/footer segment |
| final static int CENTER = 1; // centered header/footer segment |
| final static int RIGHT = 2; // right aligned header/footer segment |
| |
| Printer printer; |
| StyledTextRenderer printerRenderer; |
| StyledTextPrintOptions printOptions; |
| Rectangle clientArea; |
| FontData fontData; |
| Font printerFont; |
| Hashtable resources; |
| int tabLength; |
| GC gc; // printer GC |
| int pageWidth; // width of a printer page in pixels |
| int startPage; // first page to print |
| int endPage; // last page to print |
| int startLine; // first (wrapped) line to print |
| int endLine; // last (wrapped) line to print |
| boolean singleLine; // widget single line mode |
| Point selection = null; // selected text |
| boolean mirrored; // indicates the printing gc should be mirrored |
| int lineSpacing; |
| |
| /** |
| * Creates an instance of <class>Printing</class>. |
| * Copies the widget content and rendering data that needs |
| * to be requested from listeners. |
| * </p> |
| * @param parent StyledText widget to print. |
| * @param printer printer device to print on. |
| * @param printOptions print options |
| */ |
| Printing(StyledText styledText, Printer printer, StyledTextPrintOptions printOptions) { |
| this.printer = printer; |
| this.printOptions = printOptions; |
| this.mirrored = (styledText.getStyle() & SWT.MIRRORED) != 0; |
| singleLine = styledText.isSingleLine(); |
| startPage = 1; |
| endPage = Integer.MAX_VALUE; |
| PrinterData data = printer.getPrinterData(); |
| if (data.scope == PrinterData.PAGE_RANGE) { |
| startPage = data.startPage; |
| endPage = data.endPage; |
| if (endPage < startPage) { |
| int temp = endPage; |
| endPage = startPage; |
| startPage = temp; |
| } |
| } else if (data.scope == PrinterData.SELECTION) { |
| selection = styledText.getSelectionRange(); |
| } |
| printerRenderer = new StyledTextRenderer(printer, null); |
| printerRenderer.setContent(copyContent(styledText.getContent())); |
| cacheLineData(styledText); |
| |
| } |
| /** |
| * Caches all line data that needs to be requested from a listener. |
| * </p> |
| * @param printerContent <class>StyledTextContent</class> to request |
| * line data for. |
| */ |
| void cacheLineData(StyledText styledText) { |
| StyledTextRenderer renderer = styledText.renderer; |
| renderer.copyInto(printerRenderer); |
| fontData = styledText.getFont().getFontData()[0]; |
| tabLength = styledText.tabLength; |
| int lineCount = printerRenderer.lineCount; |
| if (styledText.isListening(LineGetBackground) || (styledText.isBidi() && styledText.isListening(LineGetSegments)) || styledText.isListening(LineGetStyle)) { |
| StyledTextContent content = printerRenderer.content; |
| for (int i = 0; i < lineCount; i++) { |
| String line = content.getLine(i); |
| int lineOffset = content.getOffsetAtLine(i); |
| StyledTextEvent event = styledText.getLineBackgroundData(lineOffset, line); |
| if (event != null && event.lineBackground != null) { |
| printerRenderer.setLineBackground(i, 1, event.lineBackground); |
| } |
| if (styledText.isBidi()) { |
| int[] segments = styledText.getBidiSegments(lineOffset, line); |
| printerRenderer.setLineSegments(i, 1, segments); |
| } |
| event = styledText.getLineStyleData(lineOffset, line); |
| if (event != null) { |
| printerRenderer.setLineIndent(i, 1, event.indent); |
| printerRenderer.setLineAlignment(i, 1, event.alignment); |
| printerRenderer.setLineJustify(i, 1, event.justify); |
| printerRenderer.setLineBullet(i, 1, event.bullet); |
| StyleRange[] styles = event.styles; |
| if (styles != null && styles.length > 0) { |
| printerRenderer.setStyleRanges(event.ranges, styles); |
| } |
| } |
| } |
| } |
| Point screenDPI = styledText.getDisplay().getDPI(); |
| Point printerDPI = printer.getDPI(); |
| resources = new Hashtable (); |
| for (int i = 0; i < lineCount; i++) { |
| Color color = printerRenderer.getLineBackground(i, null); |
| if (color != null) { |
| if (printOptions.printLineBackground) { |
| Color printerColor = (Color)resources.get(color); |
| if (printerColor == null) { |
| printerColor = new Color (printer, color.getRGB()); |
| resources.put(color, printerColor); |
| } |
| printerRenderer.setLineBackground(i, 1, printerColor); |
| } else { |
| printerRenderer.setLineBackground(i, 1, null); |
| } |
| } |
| int indent = printerRenderer.getLineIndent(i, 0); |
| if (indent != 0) { |
| printerRenderer.setLineIndent(i, 1, indent * printerDPI.x / screenDPI.x); |
| } |
| } |
| StyleRange[] styles = printerRenderer.styles; |
| for (int i = 0; i < printerRenderer.styleCount; i++) { |
| StyleRange style = styles[i]; |
| Font font = style.font; |
| if (style.font != null) { |
| Font printerFont = (Font)resources.get(font); |
| if (printerFont == null) { |
| printerFont = new Font (printer, font.getFontData()); |
| resources.put(font, printerFont); |
| } |
| style.font = printerFont; |
| } |
| Color color = style.foreground; |
| if (color != null) { |
| Color printerColor = (Color)resources.get(color); |
| if (printOptions.printTextForeground) { |
| if (printerColor == null) { |
| printerColor = new Color (printer, color.getRGB()); |
| resources.put(color, printerColor); |
| } |
| style.foreground = printerColor; |
| } else { |
| style.foreground = null; |
| } |
| } |
| color = style.background; |
| if (color != null) { |
| Color printerColor = (Color)resources.get(color); |
| if (printOptions.printTextBackground) { |
| if (printerColor == null) { |
| printerColor = new Color (printer, color.getRGB()); |
| resources.put(color, printerColor); |
| } |
| style.background = printerColor; |
| } else { |
| style.background = null; |
| } |
| } |
| if (!printOptions.printTextFontStyle) { |
| style.fontStyle = SWT.NORMAL; |
| } |
| style.rise = style.rise * printerDPI.y / screenDPI.y; |
| GlyphMetrics metrics = style.metrics; |
| if (metrics != null) { |
| metrics.ascent = metrics.ascent * printerDPI.y / screenDPI.y; |
| metrics.descent = metrics.descent * printerDPI.y / screenDPI.y; |
| metrics.width = metrics.width * printerDPI.x / screenDPI.x; |
| } |
| } |
| lineSpacing = styledText.lineSpacing * printerDPI.y / screenDPI.y; |
| } |
| /** |
| * Copies the text of the specified <class>StyledTextContent</class>. |
| * </p> |
| * @param original the <class>StyledTextContent</class> to copy. |
| */ |
| StyledTextContent copyContent(StyledTextContent original) { |
| StyledTextContent printerContent = new DefaultContent(); |
| int insertOffset = 0; |
| for (int i = 0; i < original.getLineCount(); i++) { |
| int insertEndOffset; |
| if (i < original.getLineCount() - 1) { |
| insertEndOffset = original.getOffsetAtLine(i + 1); |
| } else { |
| insertEndOffset = original.getCharCount(); |
| } |
| printerContent.replaceTextRange(insertOffset, 0, original.getTextRange(insertOffset, insertEndOffset - insertOffset)); |
| insertOffset = insertEndOffset; |
| } |
| return printerContent; |
| } |
| /** |
| * Disposes of the resources and the <class>PrintRenderer</class>. |
| */ |
| void dispose() { |
| if (gc != null) { |
| gc.dispose(); |
| gc = null; |
| } |
| if (resources != null) { |
| Enumeration enumeration = resources.elements(); |
| while (enumeration.hasMoreElements()) { |
| Resource resource = (Resource) enumeration.nextElement(); |
| resource.dispose(); |
| } |
| resources = null; |
| } |
| if (printerFont != null) { |
| printerFont.dispose(); |
| printerFont = null; |
| } |
| if (printerRenderer != null) { |
| printerRenderer.dispose(); |
| printerRenderer = null; |
| } |
| } |
| void init() { |
| Rectangle trim = printer.computeTrim(0, 0, 0, 0); |
| Point dpi = printer.getDPI(); |
| |
| printerFont = new Font(printer, fontData.getName(), fontData.getHeight(), SWT.NORMAL); |
| clientArea = printer.getClientArea(); |
| pageWidth = clientArea.width; |
| // one inch margin around text |
| clientArea.x = dpi.x + trim.x; |
| clientArea.y = dpi.y + trim.y; |
| clientArea.width -= (clientArea.x + trim.width); |
| clientArea.height -= (clientArea.y + trim.height); |
| |
| int style = mirrored ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT; |
| gc = new GC(printer, style); |
| gc.setFont(printerFont); |
| printerRenderer.setFont(printerFont, tabLength); |
| int lineHeight = printerRenderer.getLineHeight(); |
| if (printOptions.header != null) { |
| clientArea.y += lineHeight * 2; |
| clientArea.height -= lineHeight * 2; |
| } |
| if (printOptions.footer != null) { |
| clientArea.height -= lineHeight * 2; |
| } |
| |
| // TODO not wrapped |
| StyledTextContent content = printerRenderer.content; |
| startLine = 0; |
| endLine = singleLine ? 0 : content.getLineCount() - 1; |
| PrinterData data = printer.getPrinterData(); |
| if (data.scope == PrinterData.PAGE_RANGE) { |
| int pageSize = clientArea.height / lineHeight;//WRONG |
| startLine = (startPage - 1) * pageSize; |
| } else if (data.scope == PrinterData.SELECTION) { |
| startLine = content.getLineAtOffset(selection.x); |
| if (selection.y > 0) { |
| endLine = content.getLineAtOffset(selection.x + selection.y - 1); |
| } else { |
| endLine = startLine - 1; |
| } |
| } |
| } |
| /** |
| * Prints the lines in the specified page range. |
| */ |
| void print() { |
| Color background = gc.getBackground(); |
| Color foreground = gc.getForeground(); |
| int paintY = clientArea.y; |
| int paintX = clientArea.x; |
| int page = startPage; |
| int pageBottom = clientArea.y + clientArea.height; |
| int orientation = gc.getStyle() & (SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT); |
| |
| |
| for (int i = startLine; i <= endLine && page <= endPage; i++) { |
| if (paintY == clientArea.y) { |
| printer.startPage(); |
| printDecoration(page, true); |
| } |
| TextLayout layout = printerRenderer.getTextLayout(i, orientation, clientArea.width, lineSpacing); |
| Color lineBackground = printerRenderer.getLineBackground(i, background); |
| int paragraphBottom = paintY + layout.getBounds().height; |
| if (paragraphBottom <= pageBottom) { |
| //normal case, the whole paragraph fits in the current page |
| printLine(paintX, paintY, gc, foreground, lineBackground, layout); |
| paintY = paragraphBottom; |
| } else { |
| int lineCount = layout.getLineCount(); |
| while (paragraphBottom > pageBottom && lineCount > 0) { |
| lineCount--; |
| paragraphBottom -= layout.getLineBounds(lineCount).height + layout.getSpacing(); |
| } |
| if (lineCount == 0) { |
| //the whole paragraph goes to the next page |
| printDecoration(page, false); |
| printer.endPage(); |
| page++; |
| if (page <= endPage) { |
| printer.startPage(); |
| printDecoration(page, true); |
| paintY = clientArea.y; |
| printLine(paintX, paintY, gc, foreground, lineBackground, layout); |
| paintY += layout.getBounds().height; |
| } |
| } else { |
| //draw paragraph top in the current page and paragraph bottom in the next |
| int height = paragraphBottom - paintY; |
| gc.setClipping(paintX, paintY, clientArea.width, height); |
| printLine(paintX, paintY, gc, foreground, lineBackground, layout); |
| printDecoration(page, false); |
| printer.endPage(); |
| page++; |
| if (page <= endPage) { |
| printer.startPage(); |
| printDecoration(page, true); |
| paintY = clientArea.y - height; |
| int layoutHeight = layout.getBounds().height; |
| gc.setClipping(paintX, clientArea.y, clientArea.width, layoutHeight - height); |
| printLine(paintX, paintY, gc, foreground, lineBackground, layout); |
| paintY += layoutHeight; |
| } |
| gc.setClipping((Rectangle)null); |
| } |
| } |
| printerRenderer.disposeTextLayout(layout); |
| } |
| if (paintY > clientArea.y) { |
| // close partial page |
| printDecoration(page, false); |
| printer.endPage(); |
| } |
| } |
| /** |
| * Print header or footer decorations. |
| * |
| * @param page page number to print, if specified in the StyledTextPrintOptions header or footer. |
| * @param header true = print the header, false = print the footer |
| */ |
| void printDecoration(int page, boolean header) { |
| String text = header ? printOptions.header : printOptions.footer; |
| if (text == null) return; |
| int lastSegmentIndex = 0; |
| int segmentCount = 3; |
| for (int i = 0; i < segmentCount; i++) { |
| int segmentIndex = text.indexOf(StyledTextPrintOptions.SEPARATOR, lastSegmentIndex); |
| String segment; |
| if (segmentIndex == -1) { |
| segment = text.substring(lastSegmentIndex); |
| printDecorationSegment(segment, i, page, header); |
| break; |
| } else { |
| segment = text.substring(lastSegmentIndex, segmentIndex); |
| printDecorationSegment(segment, i, page, header); |
| lastSegmentIndex = segmentIndex + StyledTextPrintOptions.SEPARATOR.length(); |
| } |
| } |
| } |
| /** |
| * Print one segment of a header or footer decoration. |
| * Headers and footers have three different segments. |
| * One each for left aligned, centered, and right aligned text. |
| * |
| * @param segment decoration segment to print |
| * @param alignment alignment of the segment. 0=left, 1=center, 2=right |
| * @param page page number to print, if specified in the decoration segment. |
| * @param header true = print the header, false = print the footer |
| */ |
| void printDecorationSegment(String segment, int alignment, int page, boolean header) { |
| int pageIndex = segment.indexOf(StyledTextPrintOptions.PAGE_TAG); |
| if (pageIndex != -1) { |
| int pageTagLength = StyledTextPrintOptions.PAGE_TAG.length(); |
| StringBuffer buffer = new StringBuffer(segment.substring (0, pageIndex)); |
| buffer.append (page); |
| buffer.append (segment.substring(pageIndex + pageTagLength)); |
| segment = buffer.toString(); |
| } |
| if (segment.length() > 0) { |
| TextLayout layout = new TextLayout(printer); |
| layout.setText(segment); |
| layout.setFont(printerFont); |
| int segmentWidth = layout.getBounds().width; |
| int segmentHeight = printerRenderer.getLineHeight(); |
| int drawX = 0, drawY; |
| if (alignment == LEFT) { |
| drawX = clientArea.x; |
| } else if (alignment == CENTER) { |
| drawX = (pageWidth - segmentWidth) / 2; |
| } else if (alignment == RIGHT) { |
| drawX = clientArea.x + clientArea.width - segmentWidth; |
| } |
| if (header) { |
| drawY = clientArea.y - segmentHeight * 2; |
| } else { |
| drawY = clientArea.y + clientArea.height + segmentHeight; |
| } |
| layout.draw(gc, drawX, drawY); |
| layout.dispose(); |
| } |
| } |
| void printLine(int paintX, int paintY, GC gc, Color foreground, Color background, TextLayout layout) { |
| if (background != null) { |
| Rectangle rect = layout.getBounds(); |
| gc.setBackground(background); |
| gc.fillRectangle(paintX, paintY, rect.width, rect.height); |
| |
| // int lineCount = layout.getLineCount(); |
| // for (int i = 0; i < lineCount; i++) { |
| // Rectangle rect = layout.getLineBounds(i); |
| // rect.x += paintX; |
| // rect.y += paintY + layout.getSpacing(); |
| // rect.width = width;//layout bounds |
| // gc.fillRectangle(rect); |
| // } |
| } |
| gc.setForeground(foreground); |
| layout.draw(gc, paintX, paintY); |
| } |
| /** |
| * Starts a print job and prints the pages specified in the constructor. |
| */ |
| public void run() { |
| String jobName = printOptions.jobName; |
| if (jobName == null) { |
| jobName = "Printing"; |
| } |
| if (printer.startJob(jobName)) { |
| init(); |
| print(); |
| dispose(); |
| printer.endJob(); |
| } |
| } |
| } |
| /** |
| * The <code>RTFWriter</code> class is used to write widget content as |
| * rich text. The implementation complies with the RTF specification |
| * version 1.5. |
| * <p> |
| * toString() is guaranteed to return a valid RTF string only after |
| * close() has been called. |
| * </p><p> |
| * Whole and partial lines and line breaks can be written. Lines will be |
| * formatted using the styles queried from the LineStyleListener, if |
| * set, or those set directly in the widget. All styles are applied to |
| * the RTF stream like they are rendered by the widget. In addition, the |
| * widget font name and size is used for the whole text. |
| * </p> |
| */ |
| class RTFWriter extends TextWriter { |
| static final int DEFAULT_FOREGROUND = 0; |
| static final int DEFAULT_BACKGROUND = 1; |
| Vector colorTable, fontTable; |
| boolean WriteUnicode; |
| |
| /** |
| * Creates a RTF writer that writes content starting at offset "start" |
| * in the document. <code>start</code> and <code>length</code>can be set to specify partial |
| * lines. |
| * |
| * @param start start offset of content to write, 0 based from |
| * beginning of document |
| * @param length length of content to write |
| */ |
| public RTFWriter(int start, int length) { |
| super(start, length); |
| colorTable = new Vector(); |
| fontTable = new Vector(); |
| colorTable.addElement(getForeground()); |
| colorTable.addElement(getBackground()); |
| fontTable.addElement(getFont()); |
| setUnicode(); |
| } |
| /** |
| * Closes the RTF writer. Once closed no more content can be written. |
| * <b>NOTE:</b> <code>toString()</code> does not return a valid RTF string until |
| * <code>close()</code> has been called. |
| */ |
| public void close() { |
| if (!isClosed()) { |
| writeHeader(); |
| write("\n}}\0"); |
| super.close(); |
| } |
| } |
| /** |
| * Returns the index of the specified color in the RTF color table. |
| * |
| * @param color the color |
| * @param defaultIndex return value if color is null |
| * @return the index of the specified color in the RTF color table |
| * or "defaultIndex" if "color" is null. |
| */ |
| int getColorIndex(Color color, int defaultIndex) { |
| if (color == null) return defaultIndex; |
| int index = colorTable.indexOf(color); |
| if (index == -1) { |
| index = colorTable.size(); |
| colorTable.addElement(color); |
| } |
| return index; |
| } |
| /** |
| * Returns the index of the specified color in the RTF color table. |
| * |
| * @param color the color |
| * @param defaultIndex return value if color is null |
| * @return the index of the specified color in the RTF color table |
| * or "defaultIndex" if "color" is null. |
| */ |
| int getFontIndex(Font font) { |
| int index = fontTable.indexOf(font); |
| if (index == -1) { |
| index = fontTable.size(); |
| fontTable.addElement(font); |
| } |
| return index; |
| } |
| /** |
| * Determines if Unicode RTF should be written. |
| * Don't write Unicode RTF on Windows 95/98/ME or NT. |
| */ |
| void setUnicode() { |
| final String Win95 = "windows 95"; |
| final String Win98 = "windows 98"; |
| final String WinME = "windows me"; |
| final String WinNT = "windows nt"; |
| String osName = System.getProperty("os.name").toLowerCase(); |
| String osVersion = System.getProperty("os.version"); |
| int majorVersion = 0; |
| |
| if (osName.startsWith(WinNT) && osVersion != null) { |
| int majorIndex = osVersion.indexOf('.'); |
| if (majorIndex != -1) { |
| osVersion = osVersion.substring(0, majorIndex); |
| try { |
| majorVersion = Integer.parseInt(osVersion); |
| } catch (NumberFormatException exception) { |
| // ignore exception. version number remains unknown. |
| // will write without Unicode |
| } |
| } |
| } |
| WriteUnicode = !osName.startsWith(Win95) && |
| !osName.startsWith(Win98) && |
| !osName.startsWith(WinME) && |
| (!osName.startsWith(WinNT) || majorVersion > 4); |
| } |
| /** |
| * Appends the specified segment of "string" to the RTF data. |
| * Copy from <code>start</code> up to, but excluding, <code>end</code>. |
| * |
| * @param string string to copy a segment from. Must not contain |
| * line breaks. Line breaks should be written using writeLineDelimiter() |
| * @param start start offset of segment. 0 based. |
| * @param end end offset of segment |
| */ |
| void write(String string, int start, int end) { |
| for (int index = start; index < end; index++) { |
| char ch = string.charAt(index); |
| if (ch > 0xFF && WriteUnicode) { |
| // write the sub string from the last escaped character |
| // to the current one. Fixes bug 21698. |
| if (index > start) { |
| write(string.substring(start, index)); |
| } |
| write("\\u"); |
| write(Integer.toString((short) ch)); |
| write(' '); // control word delimiter |
| start = index + 1; |
| } else if (ch == '}' || ch == '{' || ch == '\\') { |
| // write the sub string from the last escaped character |
| // to the current one. Fixes bug 21698. |
| if (index > start) { |
| write(string.substring(start, index)); |
| } |
| write('\\'); |
| write(ch); |
| start = index + 1; |
| } |
| } |
| // write from the last escaped character to the end. |
| // Fixes bug 21698. |
| if (start < end) { |
| write(string.substring(start, end)); |
| } |
| } |
| /** |
| * Writes the RTF header including font table and color table. |
| */ |
| void writeHeader() { |
| StringBuffer header = new StringBuffer(); |
| FontData fontData = getFont().getFontData()[0]; |
| header.append("{\\rtf1\\ansi"); |
| // specify code page, necessary for copy to work in bidi |
| // systems that don't support Unicode RTF. |
| String cpg = System.getProperty("file.encoding").toLowerCase(); |
| if (cpg.startsWith("cp") || cpg.startsWith("ms")) { |
| cpg = cpg.substring(2, cpg.length()); |
| header.append("\\ansicpg"); |
| header.append(cpg); |
| } |
| header.append("\\uc0\\deff0{\\fonttbl{\\f0\\fnil "); |
| header.append(fontData.getName()); |
| header.append(";"); |
| for (int i = 1; i < fontTable.size(); i++) { |
| header.append("\\f"); |
| header.append(i); |
| header.append(" "); |
| FontData fd = ((Font)fontTable.elementAt(i)).getFontData()[0]; |
| header.append(fd.getName()); |
| header.append(";"); |
| } |
| header.append("}}\n{\\colortbl"); |
| for (int i = 0; i < colorTable.size(); i++) { |
| Color color = (Color) colorTable.elementAt(i); |
| header.append("\\red"); |
| header.append(color.getRed()); |
| header.append("\\green"); |
| header.append(color.getGreen()); |
| header.append("\\blue"); |
| header.append(color.getBlue()); |
| header.append(";"); |
| } |
| // some RTF readers ignore the deff0 font tag. Explicitly |
| // set the font for the whole document to work around this. |
| header.append("}\n{\\f0\\fs"); |
| // font size is specified in half points |
| header.append(fontData.getHeight() * 2); |
| header.append(" "); |
| write(header.toString(), 0); |
| } |
| /** |
| * Appends the specified line text to the RTF data. Lines will be formatted |
| * using the styles queried from the LineStyleListener, if set, or those set |
| * directly in the widget. |
| * |
| * @param line line text to write as RTF. Must not contain line breaks |
| * Line breaks should be written using writeLineDelimiter() |
| * @param lineOffset offset of the line. 0 based from the start of the |
| * widget document. Any text occurring before the start offset or after the |
| * end offset specified during object creation is ignored. |
| * @exception SWTException <ul> |
| * <li>ERROR_IO when the writer is closed.</li> |
| * </ul> |
| */ |
| public void writeLine(String line, int lineOffset) { |
| if (isClosed()) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| int lineIndex = content.getLineAtOffset(lineOffset); |
| int lineAlignment, lineIndent; |
| boolean lineJustify; |
| int[] ranges; |
| StyleRange[] styles; |
| StyledTextEvent event = getLineStyleData(lineOffset, line); |
| if (event != null) { |
| lineAlignment = event.alignment; |
| lineIndent = event.indent; |
| lineJustify = event.justify; |
| ranges = event.ranges; |
| styles = event.styles; |
| } else { |
| lineAlignment = renderer.getLineAlignment(lineIndex, alignment); |
| lineIndent = renderer.getLineIndent(lineIndex, indent); |
| lineJustify = renderer.getLineJustify(lineIndex, justify); |
| ranges = renderer.getRanges(lineOffset, line.length()); |
| styles = renderer.getStyleRanges(lineOffset, line.length(), false); |
| } |
| if (styles == null) styles = new StyleRange[0]; |
| Color lineBackground = renderer.getLineBackground(lineIndex, null); |
| event = getLineBackgroundData(lineOffset, line); |
| if (event != null && event.lineBackground != null) lineBackground = event.lineBackground; |
| writeStyledLine(line, lineOffset, ranges, styles, lineBackground, lineIndent, lineAlignment, lineJustify); |
| } |
| /** |
| * Appends the specified line delmimiter to the RTF data. |
| * |
| * @param lineDelimiter line delimiter to write as RTF. |
| * @exception SWTException <ul> |
| * <li>ERROR_IO when the writer is closed.</li> |
| * </ul> |
| */ |
| public void writeLineDelimiter(String lineDelimiter) { |
| if (isClosed()) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| write(lineDelimiter, 0, lineDelimiter.length()); |
| write("\\par "); |
| } |
| /** |
| * Appends the specified line text to the RTF data. |
| * <p> |
| * Use the colors and font styles specified in "styles" and "lineBackground". |
| * Formatting is written to reflect the text rendering by the text widget. |
| * Style background colors take precedence over the line background color. |
| * Background colors are written using the \highlight tag (vs. the \cb tag). |
| * </p> |
| * |
| * @param line line text to write as RTF. Must not contain line breaks |
| * Line breaks should be written using writeLineDelimiter() |
| * @param lineOffset offset of the line. 0 based from the start of the |
| * widget document. Any text occurring before the start offset or after the |
| * end offset specified during object creation is ignored. |
| * @param styles styles to use for formatting. Must not be null. |
| * @param lineBackground line background color to use for formatting. |
| * May be null. |
| */ |
| void writeStyledLine(String line, int lineOffset, int ranges[], StyleRange[] styles, Color lineBackground, int indent, int alignment, boolean justify) { |
| int lineLength = line.length(); |
| int startOffset = getStart(); |
| int writeOffset = startOffset - lineOffset; |
| if (writeOffset >= lineLength) return; |
| int lineIndex = Math.max(0, writeOffset); |
| |
| write("\\fi"); |
| write(indent); |
| switch (alignment) { |
| case SWT.LEFT: write("\\ql"); break; |
| case SWT.CENTER: write("\\qc"); break; |
| case SWT.RIGHT: write("\\qr"); break; |
| } |
| if (justify) write("\\qj"); |
| write(" "); |
| |
| if (lineBackground != null) { |
| write("{\\highlight"); |
| write(getColorIndex(lineBackground, DEFAULT_BACKGROUND)); |
| write(" "); |
| } |
| int endOffset = startOffset + super.getCharCount(); |
| int lineEndOffset = Math.min(lineLength, endOffset - lineOffset); |
| for (int i = 0; i < styles.length; i++) { |
| StyleRange style = styles[i]; |
| int start, end; |
| if (ranges != null) { |
| start = ranges[i << 1] - lineOffset; |
| end = start + ranges[(i << 1) + 1]; |
| } else { |
| start = style.start - lineOffset; |
| end = start + style.length; |
| } |
| // skip over partial first line |
| if (end < writeOffset) { |
| continue; |
| } |
| // style starts beyond line end or RTF write end |
| if (start >= lineEndOffset) { |
| break; |
| } |
| // write any unstyled text |
| if (lineIndex < start) { |
| // copy to start of style |
| // style starting betond end of write range or end of line |
| // is guarded against above. |
| write(line, lineIndex, start); |
| lineIndex = start; |
| } |
| // write styled text |
| write("{\\cf"); |
| write(getColorIndex(style.foreground, DEFAULT_FOREGROUND)); |
| int colorIndex = getColorIndex(style.background, DEFAULT_BACKGROUND); |
| if (colorIndex != DEFAULT_BACKGROUND) { |
| write("\\highlight"); |
| write(colorIndex); |
| } |
| Font font = style.font; |
| if (font != null) { |
| int fontIndex = getFontIndex(font); |
| write("\\f"); |
| write(fontIndex); |
| FontData fontData = font.getFontData()[0]; |
| write("\\fs"); |
| write(fontData.getHeight() * 2); |
| } else { |
| if ((style.fontStyle & SWT.BOLD) != 0) { |
| write("\\b"); |
| } |
| if ((style.fontStyle & SWT.ITALIC) != 0) { |
| write("\\i"); |
| } |
| } |
| if (style.underline) { |
| write("\\ul"); |
| } |
| if (style.strikeout) { |
| write("\\strike"); |
| } |
| write(" "); |
| // copy to end of style or end of write range or end of line |
| int copyEnd = Math.min(end, lineEndOffset); |
| // guard against invalid styles and let style processing continue |
| copyEnd = Math.max(copyEnd, lineIndex); |
| write(line, lineIndex, copyEnd); |
| if (font == null) { |
| if ((style.fontStyle & SWT.BOLD) != 0) { |
| write("\\b0"); |
| } |
| if ((style.fontStyle & SWT.ITALIC) != 0) { |
| write("\\i0"); |
| } |
| } |
| if (style.underline) { |
| write("\\ul0"); |
| } |
| if (style.strikeout) { |
| write("\\strike0"); |
| } |
| write("}"); |
| lineIndex = copyEnd; |
| } |
| // write unstyled text at the end of the line |
| if (lineIndex < lineEndOffset) { |
| write(line, lineIndex, lineEndOffset); |
| } |
| if (lineBackground != null) write("}"); |
| } |
| } |
| /** |
| * The <code>TextWriter</code> class is used to write widget content to |
| * a string. Whole and partial lines and line breaks can be written. To write |
| * partial lines, specify the start and length of the desired segment |
| * during object creation. |
| * <p> |
| * </b>NOTE:</b> <code>toString()</code> is guaranteed to return a valid string only after close() |
| * has been called. |
| * </p> |
| */ |
| class TextWriter { |
| private StringBuffer buffer; |
| private int startOffset; // offset of first character that will be written |
| private int endOffset; // offset of last character that will be written. |
| // 0 based from the beginning of the widget text. |
| private boolean isClosed = false; |
| |
| /** |
| * Creates a writer that writes content starting at offset "start" |
| * in the document. <code>start</code> and <code>length</code> can be set to specify partial lines. |
| * |
| * @param start start offset of content to write, 0 based from beginning of document |
| * @param length length of content to write |
| */ |
| public TextWriter(int start, int length) { |
| buffer = new StringBuffer(length); |
| startOffset = start; |
| endOffset = start + length; |
| } |
| /** |
| * Closes the writer. Once closed no more content can be written. |
| * <b>NOTE:</b> <code>toString()</code> is not guaranteed to return a valid string unless |
| * the writer is closed. |
| */ |
| public void close() { |
| if (!isClosed) { |
| isClosed = true; |
| } |
| } |
| /** |
| * Returns the number of characters to write. |
| * @return the integer number of characters to write |
| */ |
| public int getCharCount() { |
| return endOffset - startOffset; |
| } |
| /** |
| * Returns the offset where writing starts. 0 based from the start of |
| * the widget text. Used to write partial lines. |
| * @return the integer offset where writing starts |
| */ |
| public int getStart() { |
| return startOffset; |
| } |
| /** |
| * Returns whether the writer is closed. |
| * @return a boolean specifying whether or not the writer is closed |
| */ |
| public boolean isClosed() { |
| return isClosed; |
| } |
| /** |
| * Returns the string. <code>close()</code> must be called before <code>toString()</code> |
| * is guaranteed to return a valid string. |
| * |
| * @return the string |
| */ |
| public String toString() { |
| return buffer.toString(); |
| } |
| /** |
| * Appends the given string to the data. |
| */ |
| void write(String string) { |
| buffer.append(string); |
| } |
| /** |
| * Inserts the given string to the data at the specified offset. |
| * <p> |
| * Do nothing if "offset" is < 0 or > getCharCount() |
| * </p> |
| * |
| * @param string text to insert |
| * @param offset offset in the existing data to insert "string" at. |
| */ |
| void write(String string, int offset) { |
| if (offset < 0 || offset > buffer.length()) { |
| return; |
| } |
| buffer.insert(offset, string); |
| } |
| /** |
| * Appends the given int to the data. |
| */ |
| void write(int i) { |
| buffer.append(i); |
| } |
| /** |
| * Appends the given character to the data. |
| */ |
| void write(char i) { |
| buffer.append(i); |
| } |
| /** |
| * Appends the specified line text to the data. |
| * |
| * @param line line text to write. Must not contain line breaks |
| * Line breaks should be written using writeLineDelimiter() |
| * @param lineOffset offset of the line. 0 based from the start of the |
| * widget document. Any text occurring before the start offset or after the |
| * end offset specified during object creation is ignored. |
| * @exception SWTException <ul> |
| * <li>ERROR_IO when the writer is closed.</li> |
| * </ul> |
| */ |
| public void writeLine(String line, int lineOffset) { |
| if (isClosed) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| int writeOffset = startOffset - lineOffset; |
| int lineLength = line.length(); |
| int lineIndex; |
| if (writeOffset >= lineLength) { |
| return; // whole line is outside write range |
| } else if (writeOffset > 0) { |
| lineIndex = writeOffset; // line starts before write start |
| } else { |
| lineIndex = 0; |
| } |
| int copyEnd = Math.min(lineLength, endOffset - lineOffset); |
| if (lineIndex < copyEnd) { |
| write(line.substring(lineIndex, copyEnd)); |
| } |
| } |
| /** |
| * Appends the specified line delmimiter to the data. |
| * |
| * @param lineDelimiter line delimiter to write |
| * @exception SWTException <ul> |
| * <li>ERROR_IO when the writer is closed.</li> |
| * </ul> |
| */ |
| public void writeLineDelimiter(String lineDelimiter) { |
| if (isClosed) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| write(lineDelimiter); |
| } |
| } |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a widget which will be the parent of the new instance (cannot be null) |
| * @param style the style of widget to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * </ul> |
| * |
| * @see SWT#FULL_SELECTION |
| * @see SWT#MULTI |
| * @see SWT#READ_ONLY |
| * @see SWT#SINGLE |
| * @see SWT#WRAP |
| * @see #getStyle |
| */ |
| public StyledText(Composite parent, int style) { |
| super(parent, checkStyle(style)); |
| // set the fg in the OS to ensure that these are the same as StyledText, necessary |
| // for ensuring that the bg/fg the IME box uses is the same as what StyledText uses |
| super.setForeground(getForeground()); |
| Display display = getDisplay(); |
| isMirrored = (super.getStyle() & SWT.MIRRORED) != 0; |
| fixedLineHeight = true; |
| if ((style & SWT.READ_ONLY) != 0) { |
| setEditable(false); |
| } |
| leftMargin = rightMargin = isBidiCaret() ? BIDI_CARET_WIDTH - 1: 0; |
| if ((style & SWT.SINGLE) != 0 && (style & SWT.BORDER) != 0) { |
| leftMargin = topMargin = rightMargin = bottomMargin = 2; |
| } |
| alignment = style & (SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| if (alignment == 0) alignment = SWT.LEFT; |
| clipboard = new Clipboard(display); |
| installDefaultContent(); |
| renderer = new StyledTextRenderer(getDisplay(), this); |
| renderer.setContent(content); |
| renderer.setFont(getFont(), tabLength); |
| defaultCaret = new Caret(this, SWT.NULL); |
| if ((style & SWT.WRAP) != 0) { |
| setWordWrap(true); |
| } |
| if (isBidiCaret()) { |
| createCaretBitmaps(); |
| Runnable runnable = new Runnable() { |
| public void run() { |
| int direction = BidiUtil.getKeyboardLanguage() == BidiUtil.KEYBOARD_BIDI ? SWT.RIGHT : SWT.LEFT; |
| if (direction == caretDirection) return; |
| if (getCaret() != defaultCaret) return; |
| Point newCaretPos = getPointAtOffset(caretOffset); |
| setCaretLocation(newCaretPos, direction); |
| } |
| }; |
| BidiUtil.addLanguageListener(handle, runnable); |
| } |
| setCaret(defaultCaret); |
| calculateScrollBars(); |
| createKeyBindings(); |
| setCursor(display.getSystemCursor(SWT.CURSOR_IBEAM)); |
| installListeners(); |
| initializeAccessible(); |
| } |
| /** |
| * Adds an extended modify listener. An ExtendedModify event is sent by the |
| * widget when the widget text has changed. |
| * |
| * @param extendedModifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addExtendedModifyListener(ExtendedModifyListener extendedModifyListener) { |
| checkWidget(); |
| if (extendedModifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| StyledTextListener typedListener = new StyledTextListener(extendedModifyListener); |
| addListener(ExtendedModify, typedListener); |
| } |
| /** |
| * Adds a bidirectional segment listener. |
| * <p> |
| * A BidiSegmentEvent is sent |
| * whenever a line of text is measured or rendered. The user can |
| * specify text ranges in the line that should be treated as if they |
| * had a different direction than the surrounding text. |
| * This may be used when adjacent segments of right-to-left text should |
| * not be reordered relative to each other. |
| * E.g., Multiple Java string literals in a right-to-left language |
| * should generally remain in logical order to each other, that is, the |
| * way they are stored. |
| * </p> |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| * @see BidiSegmentEvent |
| * @since 2.0 |
| */ |
| public void addBidiSegmentListener(BidiSegmentListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(LineGetSegments, new StyledTextListener(listener)); |
| } |
| /** |
| * Adds a line background listener. A LineGetBackground event is sent by the |
| * widget to determine the background color for a line. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addLineBackgroundListener(LineBackgroundListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (!isListening(LineGetBackground)) { |
| renderer.clearLineBackground(0, content.getLineCount()); |
| } |
| addListener(LineGetBackground, new StyledTextListener(listener)); |
| } |
| /** |
| * Adds a line style listener. A LineGetStyle event is sent by the widget to |
| * determine the styles for a line. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addLineStyleListener(LineStyleListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (!isListening(LineGetStyle)) { |
| setStyleRanges(0, 0, null, null, true); |
| renderer.clearLineStyle(0, content.getLineCount()); |
| } |
| addListener(LineGetStyle, new StyledTextListener(listener)); |
| } |
| /** |
| * Adds a modify listener. A Modify event is sent by the widget when the widget text |
| * has changed. |
| * |
| * @param modifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addModifyListener(ModifyListener modifyListener) { |
| checkWidget(); |
| if (modifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(SWT.Modify, new TypedListener(modifyListener)); |
| } |
| /** |
| * Adds a paint object listener. A paint object event is sent by the widget when an object |
| * needs to be drawn. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| * |
| * @since 3.2 |
| * |
| * @see PaintObjectListener |
| * @see PaintObjectEvent |
| */ |
| public void addPaintObjectListener(PaintObjectListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(PaintObject, new StyledTextListener(listener)); |
| } |
| /** |
| * Adds a selection listener. A Selection event is sent by the widget when the |
| * selection has changed. |
| * <p> |
| * When <code>widgetSelected</code> is called, the event x and y fields contain |
| * the start and end caret indices of the selection. |
| * <code>widgetDefaultSelected</code> is not called for StyledTexts. |
| * </p> |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(SWT.Selection, new TypedListener(listener)); |
| } |
| /** |
| * Adds a verify key listener. A VerifyKey event is sent by the widget when a key |
| * is pressed. The widget ignores the key press if the listener sets the doit field |
| * of the event to false. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addVerifyKeyListener(VerifyKeyListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(VerifyKey, new StyledTextListener(listener)); |
| } |
| /** |
| * Adds a verify listener. A Verify event is sent by the widget when the widget text |
| * is about to change. The listener can set the event text and the doit field to |
| * change the text that is set in the widget or to force the widget to ignore the |
| * text change. |
| * |
| * @param verifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void addVerifyListener(VerifyListener verifyListener) { |
| checkWidget(); |
| if (verifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| addListener(SWT.Verify, new TypedListener(verifyListener)); |
| } |
| /** |
| * Appends a string to the text at the end of the widget. |
| * |
| * @param string the string to be appended |
| * @see #replaceTextRange(int,int,String) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void append(String string) { |
| checkWidget(); |
| if (string == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| int lastChar = Math.max(getCharCount(), 0); |
| replaceTextRange(lastChar, 0, string); |
| } |
| /** |
| * Calculates the scroll bars |
| */ |
| void calculateScrollBars() { |
| ScrollBar horizontalBar = getHorizontalBar(); |
| ScrollBar verticalBar = getVerticalBar(); |
| setScrollBars(true); |
| if (verticalBar != null) { |
| verticalBar.setIncrement(getVerticalIncrement()); |
| } |
| if (horizontalBar != null) { |
| horizontalBar.setIncrement(getHorizontalIncrement()); |
| } |
| } |
| /** |
| * Calculates the top index based on the current vertical scroll offset. |
| * The top index is the index of the topmost fully visible line or the |
| * topmost partially visible line if no line is fully visible. |
| * The top index starts at 0. |
| */ |
| void calculateTopIndex(int delta) { |
| int oldTopIndex = topIndex; |
| int oldTopIndexY = topIndexY; |
| if (isFixedLineHeight()) { |
| int verticalIncrement = getVerticalIncrement(); |
| if (verticalIncrement == 0) { |
| return; |
| } |
| topIndex = Compatibility.ceil(getVerticalScrollOffset(), verticalIncrement); |
| // Set top index to partially visible top line if no line is fully |
| // visible but at least some of the widget client area is visible. |
| // Fixes bug 15088. |
| if (topIndex > 0) { |
| if (clientAreaHeight > 0) { |
| int bottomPixel = getVerticalScrollOffset() + clientAreaHeight; |
| int fullLineTopPixel = topIndex * verticalIncrement; |
| int fullLineVisibleHeight = bottomPixel - fullLineTopPixel; |
| // set top index to partially visible line if no line fully fits in |
| // client area or if space is available but not used (the latter should |
| // never happen because we use claimBottomFreeSpace) |
| if (fullLineVisibleHeight < verticalIncrement) { |
| topIndex--; |
| } |
| } else if (topIndex >= content.getLineCount()) { |
| topIndex = content.getLineCount() - 1; |
| } |
| } |
| } else { |
| if (delta >= 0) { |
| delta -= topIndexY; |
| int lineIndex = topIndex; |
| int lineCount = content.getLineCount(); |
| while (lineIndex < lineCount) { |
| if (delta <= 0) break; |
| delta -= renderer.getLineHeight(lineIndex++); |
| } |
| if (lineIndex < lineCount && -delta + renderer.getLineHeight(lineIndex) <= clientAreaHeight - topMargin - bottomMargin) { |
| topIndex = lineIndex; |
| topIndexY = -delta; |
| } else { |
| topIndex = lineIndex - 1; |
| topIndexY = -renderer.getLineHeight(topIndex) - delta; |
| } |
| } else { |
| delta -= topIndexY; |
| int lineIndex = topIndex; |
| while (lineIndex > 0) { |
| int lineHeight = renderer.getLineHeight(lineIndex - 1); |
| if (delta + lineHeight > 0) break; |
| delta += lineHeight; |
| lineIndex--; |
| } |
| if (lineIndex == 0 || -delta + renderer.getLineHeight(lineIndex) <= clientAreaHeight - topMargin - bottomMargin) { |
| topIndex = lineIndex; |
| topIndexY = - delta; |
| } else { |
| topIndex = lineIndex - 1; |
| topIndexY = - renderer.getLineHeight(topIndex) - delta; |
| } |
| } |
| } |
| if (topIndex != oldTopIndex || oldTopIndexY != topIndexY) { |
| renderer.calculateClientArea(); |
| setScrollBars(false); |
| } |
| } |
| /** |
| * Hides the scroll bars if widget is created in single line mode. |
| */ |
| static int checkStyle(int style) { |
| if ((style & SWT.SINGLE) != 0) { |
| style &= ~(SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP | SWT.MULTI); |
| } else { |
| style |= SWT.MULTI; |
| if ((style & SWT.WRAP) != 0) { |
| style &= ~SWT.H_SCROLL; |
| } |
| } |
| style |= SWT.NO_REDRAW_RESIZE | SWT.DOUBLE_BUFFERED | SWT.NO_BACKGROUND; |
| return style; |
| } |
| /** |
| * Scrolls down the text to use new space made available by a resize or by |
| * deleted lines. |
| */ |
| void claimBottomFreeSpace() { |
| int clientAreaHeight = this.clientAreaHeight - topMargin - bottomMargin; |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| int newVerticalOffset = Math.max(0, content.getLineCount() * lineHeight - clientAreaHeight); |
| if (newVerticalOffset < getVerticalScrollOffset()) { |
| scrollVertical(newVerticalOffset - getVerticalScrollOffset(), true); |
| } |
| } else { |
| int bottomIndex = getPartialBottomIndex(); |
| int height = getLinePixel(bottomIndex + 1); |
| if (clientAreaHeight > height) { |
| scrollVertical(-getAvailableHeightAbove(clientAreaHeight - height), true); |
| } |
| } |
| } |
| /** |
| * Scrolls text to the right to use new space made available by a resize. |
| */ |
| void claimRightFreeSpace() { |
| int newHorizontalOffset = Math.max(0, renderer.getWidth() - (clientAreaWidth - leftMargin - rightMargin)); |
| if (newHorizontalOffset < horizontalScrollOffset) { |
| // item is no longer drawn past the right border of the client area |
| // align the right end of the item with the right border of the |
| // client area (window is scrolled right). |
| scrollHorizontal(newHorizontalOffset - horizontalScrollOffset, true); |
| } |
| } |
| /** |
| * Removes the widget selection. |
| * |
| * @param sendEvent a Selection event is sent when set to true and when the selection is actually reset. |
| */ |
| void clearSelection(boolean sendEvent) { |
| int selectionStart = selection.x; |
| int selectionEnd = selection.y; |
| resetSelection(); |
| // redraw old selection, if any |
| if (selectionEnd - selectionStart > 0) { |
| int length = content.getCharCount(); |
| // called internally to remove selection after text is removed |
| // therefore make sure redraw range is valid. |
| int redrawStart = Math.min(selectionStart, length); |
| int redrawEnd = Math.min(selectionEnd, length); |
| if (redrawEnd - redrawStart > 0) { |
| internalRedrawRange(redrawStart, redrawEnd - redrawStart); |
| } |
| if (sendEvent) { |
| sendSelectionEvent(); |
| } |
| } |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| int lineCount = (getStyle() & SWT.SINGLE) != 0 ? 1 : content.getLineCount(); |
| int width = 0; |
| int height = 0; |
| if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { |
| Display display = getDisplay(); |
| int maxHeight = display.getClientArea().height; |
| for (int lineIndex = 0; lineIndex < lineCount; lineIndex++) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| if (wordWrap) layout.setWidth(wHint == 0 ? 1 : wHint); |
| Rectangle rect = layout.getBounds(); |
| height += rect.height; |
| width = Math.max(width, rect.width); |
| renderer.disposeTextLayout(layout); |
| if (isFixedLineHeight() && height > maxHeight) break; |
| } |
| if (isFixedLineHeight()) { |
| height = lineCount * renderer.getLineHeight(); |
| } |
| } |
| // Use default values if no text is defined. |
| if (width == 0) width = DEFAULT_WIDTH; |
| if (height == 0) height = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| int wTrim = leftMargin + rightMargin + getCaretWidth(); |
| int hTrim = topMargin + bottomMargin; |
| Rectangle rect = computeTrim(0, 0, width + wTrim, height + hTrim); |
| return new Point (rect.width, rect.height); |
| } |
| /** |
| * Copies the selected text to the <code>DND.CLIPBOARD</code> clipboard. |
| * <p> |
| * The text will be put on the clipboard in plain text format and RTF format. |
| * The <code>DND.CLIPBOARD</code> clipboard is used for data that is |
| * transferred by keyboard accelerator (such as Ctrl+C/Ctrl+V) or |
| * by menu action. |
| * </p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void copy() { |
| checkWidget(); |
| copy(DND.CLIPBOARD); |
| } |
| /** |
| * Copies the selected text to the specified clipboard. The text will be put in the |
| * clipboard in plain text format and RTF format. |
| * <p> |
| * The clipboardType is one of the clipboard constants defined in class |
| * <code>DND</code>. The <code>DND.CLIPBOARD</code> clipboard is |
| * used for data that is transferred by keyboard accelerator (such as Ctrl+C/Ctrl+V) |
| * or by menu action. The <code>DND.SELECTION_CLIPBOARD</code> |
| * clipboard is used for data that is transferred by selecting text and pasting |
| * with the middle mouse button. |
| * </p> |
| * |
| * @param clipboardType indicates the type of clipboard |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void copy(int clipboardType) { |
| checkWidget(); |
| if (clipboardType != DND.CLIPBOARD && clipboardType != DND.SELECTION_CLIPBOARD) return; |
| int length = selection.y - selection.x; |
| if (length > 0) { |
| try { |
| setClipboardContent(selection.x, length, clipboardType); |
| } catch (SWTError error) { |
| // Copy to clipboard failed. This happens when another application |
| // is accessing the clipboard while we copy. Ignore the error. |
| // Fixes 1GDQAVN |
| // Rethrow all other errors. Fixes bug 17578. |
| if (error.code != DND.ERROR_CANNOT_SET_CLIPBOARD) { |
| throw error; |
| } |
| } |
| } |
| } |
| /** |
| * Returns the alignment of the widget. |
| * |
| * @return the alignment |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getLineAlignment(int) |
| * |
| * @since 3.2 |
| */ |
| public int getAlignment() { |
| checkWidget(); |
| return alignment; |
| } |
| int getAvailableHeightAbove(int height) { |
| int maxHeight = verticalScrollOffset; |
| if (maxHeight == -1) { |
| int lineIndex = topIndex - 1; |
| maxHeight = -topIndexY; |
| if (topIndexY > 0) { |
| maxHeight += renderer.getLineHeight(lineIndex--); |
| } |
| while (height > maxHeight && lineIndex >= 0) { |
| maxHeight += renderer.getLineHeight(lineIndex--); |
| } |
| } |
| return Math.min(height, maxHeight); |
| } |
| int getAvailableHeightBellow(int height) { |
| int partialBottomIndex = getPartialBottomIndex(); |
| int topY = getLinePixel(partialBottomIndex); |
| int lineHeight = renderer.getLineHeight(partialBottomIndex); |
| int availableHeight = 0; |
| int clientAreaHeight = this.clientAreaHeight - topMargin - bottomMargin; |
| if (topY + lineHeight > clientAreaHeight) { |
| availableHeight = lineHeight - (clientAreaHeight - topY); |
| } |
| int lineIndex = partialBottomIndex + 1; |
| int lineCount = content.getLineCount(); |
| while (height > availableHeight && lineIndex < lineCount) { |
| availableHeight += renderer.getLineHeight(lineIndex++); |
| } |
| return Math.min(height, availableHeight); |
| } |
| /** |
| * Returns a string that uses only the line delimiter specified by the |
| * StyledTextContent implementation. |
| * <p> |
| * Returns only the first line if the widget has the SWT.SINGLE style. |
| * </p> |
| * |
| * @param text the text that may have line delimiters that don't |
| * match the model line delimiter. Possible line delimiters |
| * are CR ('\r'), LF ('\n'), CR/LF ("\r\n") |
| * @return the converted text that only uses the line delimiter |
| * specified by the model. Returns only the first line if the widget |
| * has the SWT.SINGLE style. |
| */ |
| String getModelDelimitedText(String text) { |
| int length = text.length(); |
| if (length == 0) { |
| return text; |
| } |
| int crIndex = 0; |
| int lfIndex = 0; |
| int i = 0; |
| StringBuffer convertedText = new StringBuffer(length); |
| String delimiter = getLineDelimiter(); |
| while (i < length) { |
| if (crIndex != -1) { |
| crIndex = text.indexOf(SWT.CR, i); |
| } |
| if (lfIndex != -1) { |
| lfIndex = text.indexOf(SWT.LF, i); |
| } |
| if (lfIndex == -1 && crIndex == -1) { // no more line breaks? |
| break; |
| } else if ((crIndex < lfIndex && crIndex != -1) || lfIndex == -1) { |
| convertedText.append(text.substring(i, crIndex)); |
| if (lfIndex == crIndex + 1) { // CR/LF combination? |
| i = lfIndex + 1; |
| } else { |
| i = crIndex + 1; |
| } |
| } else { // LF occurs before CR! |
| convertedText.append(text.substring(i, lfIndex)); |
| i = lfIndex + 1; |
| } |
| if (isSingleLine()) { |
| break; |
| } |
| convertedText.append(delimiter); |
| } |
| // copy remaining text if any and if not in single line mode or no |
| // text copied thus far (because there only is one line) |
| if (i < length && (!isSingleLine() || convertedText.length() == 0)) { |
| convertedText.append(text.substring(i)); |
| } |
| return convertedText.toString(); |
| } |
| /** |
| * Creates default key bindings. |
| */ |
| void createKeyBindings() { |
| int nextKey = isMirrored() ? SWT.ARROW_LEFT : SWT.ARROW_RIGHT; |
| int previousKey = isMirrored() ? SWT.ARROW_RIGHT : SWT.ARROW_LEFT; |
| |
| // Navigation |
| setKeyBinding(SWT.ARROW_UP, ST.LINE_UP); |
| setKeyBinding(SWT.ARROW_DOWN, ST.LINE_DOWN); |
| if (IS_CARBON) { |
| setKeyBinding(previousKey | SWT.MOD1, ST.LINE_START); |
| setKeyBinding(nextKey | SWT.MOD1, ST.LINE_END); |
| setKeyBinding(SWT.HOME, ST.TEXT_START); |
| setKeyBinding(SWT.END, ST.TEXT_END); |
| setKeyBinding(SWT.ARROW_UP | SWT.MOD1, ST.TEXT_START); |
| setKeyBinding(SWT.ARROW_DOWN | SWT.MOD1, ST.TEXT_END); |
| setKeyBinding(nextKey | SWT.MOD3, ST.WORD_NEXT); |
| setKeyBinding(previousKey | SWT.MOD3, ST.WORD_PREVIOUS); |
| } else { |
| setKeyBinding(SWT.HOME, ST.LINE_START); |
| setKeyBinding(SWT.END, ST.LINE_END); |
| setKeyBinding(SWT.HOME | SWT.MOD1, ST.TEXT_START); |
| setKeyBinding(SWT.END | SWT.MOD1, ST.TEXT_END); |
| setKeyBinding(nextKey | SWT.MOD1, ST.WORD_NEXT); |
| setKeyBinding(previousKey | SWT.MOD1, ST.WORD_PREVIOUS); |
| } |
| setKeyBinding(SWT.PAGE_UP, ST.PAGE_UP); |
| setKeyBinding(SWT.PAGE_DOWN, ST.PAGE_DOWN); |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD1, ST.WINDOW_START); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD1, ST.WINDOW_END); |
| setKeyBinding(nextKey, ST.COLUMN_NEXT); |
| setKeyBinding(previousKey, ST.COLUMN_PREVIOUS); |
| |
| // Selection |
| setKeyBinding(SWT.ARROW_UP | SWT.MOD2, ST.SELECT_LINE_UP); |
| setKeyBinding(SWT.ARROW_DOWN | SWT.MOD2, ST.SELECT_LINE_DOWN); |
| if (IS_CARBON) { |
| setKeyBinding(previousKey | SWT.MOD1 | SWT.MOD2, ST.SELECT_LINE_START); |
| setKeyBinding(nextKey | SWT.MOD1 | SWT.MOD2, ST.SELECT_LINE_END); |
| setKeyBinding(SWT.HOME | SWT.MOD2, ST.SELECT_TEXT_START); |
| setKeyBinding(SWT.END | SWT.MOD2, ST.SELECT_TEXT_END); |
| setKeyBinding(SWT.ARROW_UP | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_START); |
| setKeyBinding(SWT.ARROW_DOWN | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_END); |
| setKeyBinding(nextKey | SWT.MOD2 | SWT.MOD3, ST.SELECT_WORD_NEXT); |
| setKeyBinding(previousKey | SWT.MOD2 | SWT.MOD3, ST.SELECT_WORD_PREVIOUS); |
| } else { |
| setKeyBinding(SWT.HOME | SWT.MOD2, ST.SELECT_LINE_START); |
| setKeyBinding(SWT.END | SWT.MOD2, ST.SELECT_LINE_END); |
| setKeyBinding(SWT.HOME | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_START); |
| setKeyBinding(SWT.END | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_END); |
| setKeyBinding(nextKey | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_NEXT); |
| setKeyBinding(previousKey | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_PREVIOUS); |
| } |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD2, ST.SELECT_PAGE_UP); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD2, ST.SELECT_PAGE_DOWN); |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD1 | SWT.MOD2, ST.SELECT_WINDOW_START); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD1 | SWT.MOD2, ST.SELECT_WINDOW_END); |
| setKeyBinding(nextKey | SWT.MOD2, ST.SELECT_COLUMN_NEXT); |
| setKeyBinding(previousKey | SWT.MOD2, ST.SELECT_COLUMN_PREVIOUS); |
| |
| // Modification |
| // Cut, Copy, Paste |
| setKeyBinding('X' | SWT.MOD1, ST.CUT); |
| setKeyBinding('C' | SWT.MOD1, ST.COPY); |
| setKeyBinding('V' | SWT.MOD1, ST.PASTE); |
| if (IS_CARBON) { |
| setKeyBinding(SWT.DEL | SWT.MOD2, ST.DELETE_NEXT); |
| setKeyBinding(SWT.BS | SWT.MOD3, ST.DELETE_WORD_PREVIOUS); |
| setKeyBinding(SWT.DEL | SWT.MOD3, ST.DELETE_WORD_NEXT); |
| } else { |
| // Cut, Copy, Paste Wordstar style |
| setKeyBinding(SWT.DEL | SWT.MOD2, ST.CUT); |
| setKeyBinding(SWT.INSERT | SWT.MOD1, ST.COPY); |
| setKeyBinding(SWT.INSERT | SWT.MOD2, ST.PASTE); |
| } |
| setKeyBinding(SWT.BS | SWT.MOD2, ST.DELETE_PREVIOUS); |
| setKeyBinding(SWT.BS, ST.DELETE_PREVIOUS); |
| setKeyBinding(SWT.DEL, ST.DELETE_NEXT); |
| setKeyBinding(SWT.BS | SWT.MOD1, ST.DELETE_WORD_PREVIOUS); |
| setKeyBinding(SWT.DEL | SWT.MOD1, ST.DELETE_WORD_NEXT); |
| |
| // Miscellaneous |
| setKeyBinding(SWT.INSERT, ST.TOGGLE_OVERWRITE); |
| } |
| /** |
| * Create the bitmaps to use for the caret in bidi mode. This |
| * method only needs to be called upon widget creation and when the |
| * font changes (the caret bitmap height needs to match font height). |
| */ |
| void createCaretBitmaps() { |
| int caretWidth = BIDI_CARET_WIDTH; |
| Display display = getDisplay(); |
| if (leftCaretBitmap != null) { |
| if (defaultCaret != null && leftCaretBitmap.equals(defaultCaret.getImage())) { |
| defaultCaret.setImage(null); |
| } |
| leftCaretBitmap.dispose(); |
| } |
| int lineHeight = renderer.getLineHeight(); |
| leftCaretBitmap = new Image(display, caretWidth, lineHeight); |
| GC gc = new GC (leftCaretBitmap); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK)); |
| gc.fillRectangle(0, 0, caretWidth, lineHeight); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE)); |
| gc.drawLine(0,0,0,lineHeight); |
| gc.drawLine(0,0,caretWidth-1,0); |
| gc.drawLine(0,1,1,1); |
| gc.dispose(); |
| |
| if (rightCaretBitmap != null) { |
| if (defaultCaret != null && rightCaretBitmap.equals(defaultCaret.getImage())) { |
| defaultCaret.setImage(null); |
| } |
| rightCaretBitmap.dispose(); |
| } |
| rightCaretBitmap = new Image(display, caretWidth, lineHeight); |
| gc = new GC (rightCaretBitmap); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK)); |
| gc.fillRectangle(0, 0, caretWidth, lineHeight); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE)); |
| gc.drawLine(caretWidth-1,0,caretWidth-1,lineHeight); |
| gc.drawLine(0,0,caretWidth-1,0); |
| gc.drawLine(caretWidth-1,1,1,1); |
| gc.dispose(); |
| } |
| /** |
| * Moves the selected text to the clipboard. The text will be put in the |
| * clipboard in plain text format and RTF format. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void cut(){ |
| checkWidget(); |
| int length = selection.y - selection.x; |
| if (length > 0) { |
| try { |
| setClipboardContent(selection.x, length, DND.CLIPBOARD); |
| } catch (SWTError error) { |
| // Copy to clipboard failed. This happens when another application |
| // is accessing the clipboard while we copy. Ignore the error. |
| // Fixes 1GDQAVN |
| // Rethrow all other errors. Fixes bug 17578. |
| if (error.code != DND.ERROR_CANNOT_SET_CLIPBOARD) { |
| throw error; |
| } |
| // Abort cut operation if copy to clipboard fails. |
| // Fixes bug 21030. |
| return; |
| } |
| doDelete(); |
| } |
| } |
| boolean detectDrag(int x, int y, int button) { |
| if (!isListening(SWT.DragDetect)) return false; |
| if (IS_MOTIF) { |
| if (button != 2) return false; |
| } else { |
| if (button != 1) return false; |
| } |
| if (selection.x == selection.y) return false; |
| int offset = getOffsetAtPoint(x, y); |
| return offset > selection.x && offset < selection.y; |
| } |
| /** |
| * A mouse move event has occurred. See if we should start autoscrolling. If |
| * the move position is outside of the client area, initiate autoscrolling. |
| * Otherwise, we've moved back into the widget so end autoscrolling. |
| */ |
| void doAutoScroll(Event event) { |
| if (event.y > clientAreaHeight) { |
| doAutoScroll(SWT.DOWN, event.y - clientAreaHeight); |
| } else if (event.y < 0) { |
| doAutoScroll(SWT.UP, -event.y); |
| } else if (event.x < leftMargin && !wordWrap) { |
| doAutoScroll(ST.COLUMN_PREVIOUS, leftMargin - event.x); |
| } else if (event.x > clientAreaWidth - leftMargin - rightMargin && !wordWrap) { |
| doAutoScroll(ST.COLUMN_NEXT, event.x - (clientAreaWidth - leftMargin - rightMargin)); |
| } else { |
| endAutoScroll(); |
| } |
| } |
| /** |
| * Initiates autoscrolling. |
| * |
| * @param direction SWT.UP, SWT.DOWN, SWT.COLUMN_NEXT, SWT.COLUMN_PREVIOUS |
| */ |
| void doAutoScroll(int direction, int distance) { |
| autoScrollDistance = distance; |
| // If we're already autoscrolling in the given direction do nothing |
| if (autoScrollDirection == direction) { |
| return; |
| } |
| |
| Runnable timer = null; |
| final Display display = getDisplay(); |
| // Set a timer that will simulate the user pressing and holding |
| // down a cursor key (i.e., arrowUp, arrowDown). |
| if (direction == SWT.UP) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == SWT.UP) { |
| doSelectionPageUp(autoScrollDistance); |
| display.timerExec(V_SCROLL_RATE, this); |
| } |
| } |
| }; |
| autoScrollDirection = direction; |
| display.timerExec(V_SCROLL_RATE, timer); |
| } else if (direction == SWT.DOWN) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == SWT.DOWN) { |
| doSelectionPageDown(autoScrollDistance); |
| display.timerExec(V_SCROLL_RATE, this); |
| } |
| } |
| }; |
| autoScrollDirection = direction; |
| display.timerExec(V_SCROLL_RATE, timer); |
| } else if (direction == ST.COLUMN_NEXT) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == ST.COLUMN_NEXT) { |
| doVisualNext(); |
| setMouseWordSelectionAnchor(); |
| doMouseSelection(); |
| display.timerExec(H_SCROLL_RATE, this); |
| } |
| } |
| }; |
| autoScrollDirection = direction; |
| display.timerExec(H_SCROLL_RATE, timer); |
| } else if (direction == ST.COLUMN_PREVIOUS) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == ST.COLUMN_PREVIOUS) { |
| doVisualPrevious(); |
| setMouseWordSelectionAnchor(); |
| doMouseSelection(); |
| display.timerExec(H_SCROLL_RATE, this); |
| } |
| } |
| }; |
| autoScrollDirection = direction; |
| display.timerExec(H_SCROLL_RATE, timer); |
| } |
| } |
| /** |
| * Deletes the previous character. Delete the selected text if any. |
| * Move the caret in front of the deleted text. |
| */ |
| void doBackspace() { |
| Event event = new Event(); |
| event.text = ""; |
| if (selection.x != selection.y) { |
| event.start = selection.x; |
| event.end = selection.y; |
| sendKeyEvent(event); |
| } else if (caretOffset > 0) { |
| int lineIndex = content.getLineAtOffset(caretOffset); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| if (caretOffset == lineOffset) { |
| lineOffset = content.getOffsetAtLine(lineIndex - 1); |
| event.start = lineOffset + content.getLine(lineIndex - 1).length(); |
| event.end = caretOffset; |
| } else { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int start = layout.getPreviousOffset(caretOffset - lineOffset, SWT.MOVEMENT_CHAR); |
| renderer.disposeTextLayout(layout); |
| event.start = start + lineOffset; |
| event.end = caretOffset; |
| } |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Replaces the selection with the character or insert the character at the |
| * current caret position if no selection exists. |
| * <p> |
| * If a carriage return was typed replace it with the line break character |
| * used by the widget on this platform. |
| * </p> |
| * |
| * @param key the character typed by the user |
| */ |
| void doContent(char key) { |
| if (textLimit > 0 && |
| content.getCharCount() - (selection.y - selection.x) >= textLimit) { |
| return; |
| } |
| Event event = new Event(); |
| event.start = selection.x; |
| event.end = selection.y; |
| // replace a CR line break with the widget line break |
| // CR does not make sense on Windows since most (all?) applications |
| // don't recognize CR as a line break. |
| if (key == SWT.CR || key == SWT.LF) { |
| if (!isSingleLine()) { |
| event.text = getLineDelimiter(); |
| } |
| } else if (selection.x == selection.y && overwrite && key != TAB) { |
| // no selection and overwrite mode is on and the typed key is not a |
| // tab character (tabs are always inserted without overwriting)? |
| int lineIndex = content.getLineAtOffset(event.end); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| String line = content.getLine(lineIndex); |
| // replace character at caret offset if the caret is not at the |
| // end of the line |
| if (event.end < lineOffset + line.length()) { |
| event.end++; |
| } |
| event.text = new String(new char[] {key}); |
| } else { |
| event.text = new String(new char[] {key}); |
| } |
| if (event.text != null) { |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Moves the caret after the last character of the widget content. |
| */ |
| void doContentEnd() { |
| // place caret at end of first line if receiver is in single |
| // line mode. fixes 4820. |
| if (isSingleLine()) { |
| doLineEnd(); |
| } else { |
| int length = content.getCharCount(); |
| if (caretOffset < length) { |
| caretOffset = length; |
| showCaret(); |
| } |
| } |
| } |
| /** |
| * Moves the caret in front of the first character of the widget content. |
| */ |
| void doContentStart() { |
| if (caretOffset > 0) { |
| caretOffset = 0; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the start of the selection if a selection exists. |
| * Otherwise, if no selection exists move the cursor according to the |
| * cursor selection rules. |
| * |
| * @see #doSelectionCursorPrevious |
| */ |
| void doCursorPrevious() { |
| if (selection.y - selection.x > 0) { |
| caretOffset = selection.x; |
| caretAlignment = OFFSET_LEADING; |
| showCaret(); |
| } else { |
| doSelectionCursorPrevious(); |
| } |
| } |
| /** |
| * Moves the caret to the end of the selection if a selection exists. |
| * Otherwise, if no selection exists move the cursor according to the |
| * cursor selection rules. |
| * |
| * @see #doSelectionCursorNext |
| */ |
| void doCursorNext() { |
| if (selection.y - selection.x > 0) { |
| caretOffset = selection.y; |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| showCaret(); |
| } else { |
| doSelectionCursorNext(); |
| } |
| } |
| /** |
| * Deletes the next character. Delete the selected text if any. |
| */ |
| void doDelete() { |
| Event event = new Event(); |
| event.text = ""; |
| if (selection.x != selection.y) { |
| event.start = selection.x; |
| event.end = selection.y; |
| sendKeyEvent(event); |
| } else if (caretOffset < content.getCharCount()) { |
| int line = content.getLineAtOffset(caretOffset); |
| int lineOffset = content.getOffsetAtLine(line); |
| int lineLength = content.getLine(line).length(); |
| if (caretOffset == lineOffset + lineLength) { |
| event.start = caretOffset; |
| event.end = content.getOffsetAtLine(line + 1); |
| } else { |
| event.start = caretOffset; |
| event.end = getClusterNext(caretOffset, line); |
| } |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Deletes the next word. |
| */ |
| void doDeleteWordNext() { |
| if (selection.x != selection.y) { |
| // if a selection exists, treat the as if |
| // only the delete key was pressed |
| doDelete(); |
| } else { |
| Event event = new Event(); |
| event.text = ""; |
| event.start = caretOffset; |
| event.end = getWordEnd(caretOffset); |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Deletes the previous word. |
| */ |
| void doDeleteWordPrevious() { |
| if (selection.x != selection.y) { |
| // if a selection exists, treat as if |
| // only the backspace key was pressed |
| doBackspace(); |
| } else { |
| Event event = new Event(); |
| event.text = ""; |
| event.start = getWordStart(caretOffset); |
| event.end = caretOffset; |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Moves the caret one line down and to the same character offset relative |
| * to the beginning of the line. Move the caret to the end of the new line |
| * if the new line is shorter than the character offset. |
| * |
| * @return index of the new line relative to the first line in the document |
| */ |
| void doLineDown(boolean select) { |
| int caretLine = getCaretLine(); |
| int lineCount = content.getLineCount(); |
| int y = 0; |
| boolean lastLine = false; |
| if (wordWrap) { |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int lineIndex = getVisualLineIndex(layout, offsetInLine); |
| int layoutLineCount = layout.getLineCount(); |
| if (lineIndex == layoutLineCount - 1) { |
| lastLine = caretLine == lineCount - 1; |
| caretLine++; |
| } else { |
| y = layout.getLineBounds(lineIndex + 1).y; |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| lastLine = caretLine == lineCount - 1; |
| caretLine++; |
| } |
| if (lastLine) { |
| if (select) caretOffset = content.getCharCount(); |
| } else { |
| caretOffset = getOffsetAtPoint(columnX, y, caretLine); |
| } |
| int oldColumnX = columnX; |
| int oldHScrollOffset = horizontalScrollOffset; |
| if (select) { |
| setMouseWordSelectionAnchor(); |
| // select first and then scroll to reduce flash when key |
| // repeat scrolls lots of lines |
| doSelection(ST.COLUMN_NEXT); |
| } |
| showCaret(); |
| int hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| } |
| /** |
| * Moves the caret to the end of the line. |
| */ |
| void doLineEnd() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int lineEndOffset; |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| int lineIndex = getVisualLineIndex(layout, offsetInLine); |
| int[] offsets = layout.getLineOffsets(); |
| lineEndOffset = lineOffset + offsets[lineIndex + 1]; |
| renderer.disposeTextLayout(layout); |
| } else { |
| int lineLength = content.getLine(caretLine).length(); |
| lineEndOffset = lineOffset + lineLength; |
| } |
| if (caretOffset < lineEndOffset) { |
| caretOffset = lineEndOffset; |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the beginning of the line. |
| */ |
| void doLineStart() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| int lineIndex = getVisualLineIndex(layout, offsetInLine); |
| int[] offsets = layout.getLineOffsets(); |
| lineOffset += offsets[lineIndex]; |
| renderer.disposeTextLayout(layout); |
| } |
| if (caretOffset > lineOffset) { |
| caretOffset = lineOffset; |
| caretAlignment = OFFSET_LEADING; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret one line up and to the same character offset relative |
| * to the beginning of the line. Move the caret to the end of the new line |
| * if the new line is shorter than the character offset. |
| * |
| * @return index of the new line relative to the first line in the document |
| */ |
| void doLineUp(boolean select) { |
| int caretLine = getCaretLine(), y = 0; |
| boolean firstLine = false; |
| if (wordWrap) { |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int lineIndex = getVisualLineIndex(layout, offsetInLine); |
| if (lineIndex == 0) { |
| firstLine = caretLine == 0; |
| if (!firstLine) { |
| caretLine--; |
| y = renderer.getLineHeight(caretLine) - 1; |
| } |
| } else { |
| y = layout.getLineBounds(lineIndex - 1).y; |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| firstLine = caretLine == 0; |
| caretLine--; |
| } |
| if (firstLine) { |
| if (select) caretOffset = 0; |
| } else { |
| caretOffset = getOffsetAtPoint(columnX, y, caretLine); |
| } |
| int oldColumnX = columnX; |
| int oldHScrollOffset = horizontalScrollOffset; |
| if (select) setMouseWordSelectionAnchor(); |
| showCaret(); |
| if (select) doSelection(ST.COLUMN_PREVIOUS); |
| int hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| } |
| /** |
| * Moves the caret to the specified location. |
| * |
| * @param x x location of the new caret position |
| * @param y y location of the new caret position |
| * @param select the location change is a selection operation. |
| * include the line delimiter in the selection |
| */ |
| void doMouseLocationChange(int x, int y, boolean select) { |
| int line = getLineIndex(y); |
| |
| updateCaretDirection = true; |
| // allow caret to be placed below first line only if receiver is |
| // not in single line mode. fixes 4820. |
| if (line < 0 || (isSingleLine() && line > 0)) { |
| return; |
| } |
| int oldCaretAlignment = caretAlignment; |
| int newCaretOffset = getOffsetAtPoint(x, y); |
| |
| if (mouseDoubleClick) { |
| // double click word select the previous/next word. fixes bug 15610 |
| newCaretOffset = doMouseWordSelect(x, newCaretOffset, line); |
| } |
| |
| int newCaretLine = content.getLineAtOffset(newCaretOffset); |
| |
| // Is the mouse within the left client area border or on |
| // a different line? If not the autoscroll selection |
| // could be incorrectly reset. Fixes 1GKM3XS |
| if (0 <= y && y < clientAreaHeight && |
| (0 <= x && x < clientAreaWidth || wordWrap || |
| newCaretLine != content.getLineAtOffset(caretOffset))) { |
| if (newCaretOffset != caretOffset || caretAlignment != oldCaretAlignment) { |
| caretOffset = newCaretOffset; |
| if (select) doMouseSelection(); |
| showCaret(); |
| } |
| } |
| if (!select) { |
| caretOffset = newCaretOffset; |
| clearSelection(true); |
| } |
| } |
| /** |
| * Updates the selection based on the caret position |
| */ |
| void doMouseSelection() { |
| if (caretOffset <= selection.x || |
| (caretOffset > selection.x && |
| caretOffset < selection.y && selectionAnchor == selection.x)) { |
| doSelection(ST.COLUMN_PREVIOUS); |
| } else { |
| doSelection(ST.COLUMN_NEXT); |
| } |
| } |
| /** |
| * Returns the offset of the word at the specified offset. |
| * If the current selection extends from high index to low index |
| * (i.e., right to left, or caret is at left border of selecton on |
| * non-bidi platforms) the start offset of the word preceeding the |
| * selection is returned. If the current selection extends from |
| * low index to high index the end offset of the word following |
| * the selection is returned. |
| * |
| * @param x mouse x location |
| * @param newCaretOffset caret offset of the mouse cursor location |
| * @param line line index of the mouse cursor location |
| */ |
| int doMouseWordSelect(int x, int newCaretOffset, int line) { |
| // flip selection anchor based on word selection direction from |
| // base double click. Always do this here (and don't rely on doAutoScroll) |
| // because auto scroll only does not cover all possible mouse selections |
| // (e.g., mouse x < 0 && mouse y > caret line y) |
| if (newCaretOffset < selectionAnchor && selectionAnchor == selection.x) { |
| selectionAnchor = doubleClickSelection.y; |
| } else if (newCaretOffset > selectionAnchor && selectionAnchor == selection.y) { |
| selectionAnchor = doubleClickSelection.x; |
| } |
| if (0 <= x && x < clientAreaWidth) { |
| int wordOffset; |
| // find the previous/next word |
| if (caretOffset == selection.x) { |
| wordOffset = getWordStart(newCaretOffset); |
| } else { |
| wordOffset = getWordEndNoSpaces(newCaretOffset); |
| } |
| // mouse word select only on same line mouse cursor is on |
| if (content.getLineAtOffset(wordOffset) == line) { |
| newCaretOffset = wordOffset; |
| } |
| } |
| return newCaretOffset; |
| } |
| /** |
| * Scrolls one page down so that the last line (truncated or whole) |
| * of the current page becomes the fully visible top line. |
| * <p> |
| * The caret is scrolled the same number of lines so that its location |
| * relative to the top line remains the same. The exception is the end |
| * of the text where a full page scroll is not possible. In this case |
| * the caret is moved after the last character. |
| * </p> |
| * |
| * @param select whether or not to select the page |
| */ |
| void doPageDown(boolean select, int height) { |
| if (isSingleLine()) return; |
| int oldColumnX = columnX; |
| int oldHScrollOffset = horizontalScrollOffset; |
| if (isFixedLineHeight()) { |
| int lineCount = content.getLineCount(); |
| int caretLine = getCaretLine(); |
| if (caretLine < lineCount - 1) { |
| int lineHeight = renderer.getLineHeight(); |
| int lines = (height == -1 ? clientAreaHeight : height) / lineHeight; |
| int scrollLines = Math.min(lineCount - caretLine - 1, lines); |
| // ensure that scrollLines never gets negative and at least one |
| // line is scrolled. fixes bug 5602. |
| scrollLines = Math.max(1, scrollLines); |
| caretOffset = getOffsetAtPoint(columnX, getLinePixel(caretLine + scrollLines)); |
| if (select) { |
| doSelection(ST.COLUMN_NEXT); |
| } |
| // scroll one page down or to the bottom |
| int verticalMaximum = lineCount * getVerticalIncrement(); |
| int pageSize = clientAreaHeight; |
| int verticalScrollOffset = getVerticalScrollOffset(); |
| int scrollOffset = verticalScrollOffset + scrollLines * getVerticalIncrement(); |
| if (scrollOffset + pageSize > verticalMaximum) { |
| scrollOffset = verticalMaximum - pageSize; |
| } |
| if (scrollOffset > verticalScrollOffset) { |
| scrollVertical(scrollOffset - verticalScrollOffset, true); |
| } |
| } |
| } else { |
| int lineCount = content.getLineCount(); |
| int caretLine = getCaretLine(); |
| int lineIndex, lineHeight; |
| if (height == -1) { |
| lineIndex = getPartialBottomIndex(); |
| int topY = getLinePixel(lineIndex); |
| lineHeight = renderer.getLineHeight(lineIndex); |
| height = topY; |
| if (topY + lineHeight <= clientAreaHeight) { |
| height += lineHeight; |
| } else { |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int y = clientAreaHeight - topY; |
| for (int i = 0; i < layout.getLineCount(); i++) { |
| Rectangle bounds = layout.getLineBounds(i); |
| if (bounds.contains(bounds.x, y)) { |
| height += bounds.y; |
| break; |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| } |
| } |
| } else { |
| lineIndex = getLineIndex(height); |
| int topLineY = getLinePixel(lineIndex); |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int y = height - topLineY; |
| for (int i = 0; i < layout.getLineCount(); i++) { |
| Rectangle bounds = layout.getLineBounds(i); |
| if (bounds.contains(bounds.x, y)) { |
| height = topLineY + bounds.y + bounds.height; |
| break; |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| height = topLineY + renderer.getLineHeight(lineIndex); |
| } |
| } |
| int caretHeight = height; |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int offsetInLine = caretOffset - content.getOffsetAtLine(caretLine); |
| lineIndex = getVisualLineIndex(layout, offsetInLine); |
| caretHeight += layout.getLineBounds(lineIndex).y; |
| renderer.disposeTextLayout(layout); |
| } |
| lineIndex = caretLine; |
| lineHeight = renderer.getLineHeight(lineIndex); |
| while (caretHeight - lineHeight >= 0 && lineIndex < lineCount - 1) { |
| caretHeight -= lineHeight; |
| lineHeight = renderer.getLineHeight(++lineIndex); |
| } |
| caretOffset = getOffsetAtPoint(columnX, caretHeight, lineIndex); |
| if (select) doSelection(ST.COLUMN_NEXT); |
| height = getAvailableHeightBellow(height); |
| scrollVertical(height, true); |
| if (height == 0) setCaretLocation(); |
| } |
| showCaret(); |
| int hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| } |
| /** |
| * Moves the cursor to the end of the last fully visible line. |
| */ |
| void doPageEnd() { |
| // go to end of line if in single line mode. fixes 5673 |
| if (isSingleLine()) { |
| doLineEnd(); |
| } else { |
| int bottomOffset; |
| if (wordWrap) { |
| int lineIndex = getPartialBottomIndex(); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int y = (clientAreaHeight - bottomMargin) - getLinePixel(lineIndex); |
| int index = layout.getLineCount() - 1; |
| while (index >= 0) { |
| Rectangle bounds = layout.getLineBounds(index); |
| if (y >= bounds.y + bounds.height) break; |
| index--; |
| } |
| if (index == -1 && lineIndex > 0) { |
| bottomOffset = content.getOffsetAtLine(lineIndex - 1) + content.getLine(lineIndex - 1).length(); |
| } else { |
| bottomOffset = content.getOffsetAtLine(lineIndex) + Math.max(0, layout.getLineOffsets()[index + 1] - 1); |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| int lineIndex = getBottomIndex(); |
| bottomOffset = content.getOffsetAtLine(lineIndex) + content.getLine(lineIndex).length(); |
| } |
| if (caretOffset < bottomOffset) { |
| caretOffset = bottomOffset; |
| caretAlignment = OFFSET_LEADING; |
| showCaret(); |
| } |
| } |
| } |
| /** |
| * Moves the cursor to the beginning of the first fully visible line. |
| */ |
| void doPageStart() { |
| int topOffset; |
| if (wordWrap) { |
| int y, lineIndex; |
| if (topIndexY > 0) { |
| lineIndex = topIndex - 1; |
| y = renderer.getLineHeight(lineIndex) - topIndexY; |
| } else { |
| lineIndex = topIndex; |
| y = -topIndexY; |
| } |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int index = 0; |
| int lineCount = layout.getLineCount(); |
| while (index < lineCount) { |
| Rectangle bounds = layout.getLineBounds(index); |
| if (y <= bounds.y) break; |
| index++; |
| } |
| if (index == lineCount) { |
| topOffset = content.getOffsetAtLine(lineIndex + 1); |
| } else { |
| topOffset = content.getOffsetAtLine(lineIndex) + layout.getLineOffsets()[index]; |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| topOffset = content.getOffsetAtLine(topIndex); |
| } |
| if (caretOffset > topOffset) { |
| caretOffset = topOffset; |
| caretAlignment = OFFSET_LEADING; |
| showCaret(); |
| } |
| } |
| /** |
| * Scrolls one page up so that the first line (truncated or whole) |
| * of the current page becomes the fully visible last line. |
| * The caret is scrolled the same number of lines so that its location |
| * relative to the top line remains the same. The exception is the beginning |
| * of the text where a full page scroll is not possible. In this case the |
| * caret is moved in front of the first character. |
| */ |
| void doPageUp(boolean select, int height) { |
| if (isSingleLine()) return; |
| int oldHScrollOffset = horizontalScrollOffset; |
| int oldColumnX = columnX; |
| if (isFixedLineHeight()) { |
| int caretLine = getCaretLine(); |
| if (caretLine > 0) { |
| int lineHeight = renderer.getLineHeight(); |
| int lines = (height == -1 ? clientAreaHeight : height) / lineHeight; |
| int scrollLines = Math.max(1, Math.min(caretLine, lines)); |
| caretLine -= scrollLines; |
| caretOffset = getOffsetAtPoint(columnX, getLinePixel(caretLine)); |
| if (select) { |
| doSelection(ST.COLUMN_PREVIOUS); |
| } |
| int verticalScrollOffset = getVerticalScrollOffset(); |
| int scrollOffset = Math.max(0, verticalScrollOffset - scrollLines * getVerticalIncrement()); |
| if (scrollOffset < verticalScrollOffset) { |
| scrollVertical(scrollOffset - verticalScrollOffset, true); |
| } |
| } |
| } else { |
| int caretLine = getCaretLine(); |
| int lineHeight, lineIndex; |
| if (height == -1) { |
| if (topIndexY == 0) { |
| height = clientAreaHeight; |
| } else { |
| int y; |
| if (topIndex > 0) { |
| lineIndex = topIndex - 1; |
| lineHeight = renderer.getLineHeight(lineIndex); |
| height = clientAreaHeight - topIndexY; |
| y = lineHeight - topIndexY; |
| } else { |
| lineIndex = topIndex; |
| lineHeight = renderer.getLineHeight(lineIndex); |
| height = clientAreaHeight - (lineHeight + topIndexY); |
| y = -topIndexY; |
| } |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| for (int i = 0; i < layout.getLineCount(); i++) { |
| Rectangle bounds = layout.getLineBounds(i); |
| if (bounds.contains(bounds.x, y)) { |
| height += lineHeight - (bounds.y + bounds.height); |
| break; |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| } |
| } |
| } else { |
| lineIndex = getLineIndex(clientAreaHeight - height); |
| int topLineY = getLinePixel(lineIndex); |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int y = topLineY; |
| for (int i = 0; i < layout.getLineCount(); i++) { |
| Rectangle bounds = layout.getLineBounds(i); |
| if (bounds.contains(bounds.x, y)) { |
| height = clientAreaHeight - (topLineY + bounds.y); |
| break; |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| } else { |
| height = clientAreaHeight - topLineY; |
| } |
| } |
| int caretHeight = height; |
| if (wordWrap) { |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int offsetInLine = caretOffset - content.getOffsetAtLine(caretLine); |
| lineIndex = getVisualLineIndex(layout, offsetInLine); |
| caretHeight += layout.getBounds().height - layout.getLineBounds(lineIndex).y; |
| renderer.disposeTextLayout(layout); |
| } |
| lineIndex = caretLine; |
| lineHeight = renderer.getLineHeight(lineIndex); |
| while (caretHeight - lineHeight >= 0 && lineIndex > 0) { |
| caretHeight -= lineHeight; |
| lineHeight = renderer.getLineHeight(--lineIndex); |
| } |
| lineHeight = renderer.getLineHeight(lineIndex); |
| caretOffset = getOffsetAtPoint(columnX, lineHeight - caretHeight, lineIndex); |
| if (select) doSelection(ST.COLUMN_PREVIOUS); |
| height = getAvailableHeightAbove(height); |
| scrollVertical(-height, true); |
| if (height == 0) setCaretLocation(); |
| } |
| showCaret(); |
| int hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| } |
| /** |
| * Updates the selection to extend to the current caret position. |
| */ |
| void doSelection(int direction) { |
| int redrawStart = -1; |
| int redrawEnd = -1; |
| if (selectionAnchor == -1) { |
| selectionAnchor = selection.x; |
| } |
| if (direction == ST.COLUMN_PREVIOUS) { |
| if (caretOffset < selection.x) { |
| // grow selection |
| redrawEnd = selection.x; |
| redrawStart = selection.x = caretOffset; |
| // check if selection has reversed direction |
| if (selection.y != selectionAnchor) { |
| redrawEnd = selection.y; |
| selection.y = selectionAnchor; |
| } |
| // test whether selection actually changed. Fixes 1G71EO1 |
| } else if (selectionAnchor == selection.x && caretOffset < selection.y) { |
| // caret moved towards selection anchor (left side of selection). |
| // shrink selection |
| redrawEnd = selection.y; |
| redrawStart = selection.y = caretOffset; |
| } |
| } else { |
| if (caretOffset > selection.y) { |
| // grow selection |
| redrawStart = selection.y; |
| redrawEnd = selection.y = caretOffset; |
| // check if selection has reversed direction |
| if (selection.x != selectionAnchor) { |
| redrawStart = selection.x; |
| selection.x = selectionAnchor; |
| } |
| // test whether selection actually changed. Fixes 1G71EO1 |
| } else if (selectionAnchor == selection.y && caretOffset > selection.x) { |
| // caret moved towards selection anchor (right side of selection). |
| // shrink selection |
| redrawStart = selection.x; |
| redrawEnd = selection.x = caretOffset; |
| } |
| } |
| if (redrawStart != -1 && redrawEnd != -1) { |
| internalRedrawRange(redrawStart, redrawEnd - redrawStart); |
| sendSelectionEvent(); |
| } |
| } |
| /** |
| * Moves the caret to the next character or to the beginning of the |
| * next line if the cursor is at the end of a line. |
| */ |
| void doSelectionCursorNext() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| if (offsetInLine < content.getLine(caretLine).length()) { |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| offsetInLine = layout.getNextOffset(offsetInLine, SWT.MOVEMENT_CLUSTER); |
| int lineStart = layout.getLineOffsets()[layout.getLineIndex(offsetInLine)]; |
| renderer.disposeTextLayout(layout); |
| caretOffset = offsetInLine + lineOffset; |
| caretAlignment = offsetInLine == lineStart ? OFFSET_LEADING : PREVIOUS_OFFSET_TRAILING; |
| showCaret(); |
| } else if (caretLine < content.getLineCount() - 1 && !isSingleLine()) { |
| caretLine++; |
| caretOffset = content.getOffsetAtLine(caretLine); |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the previous character or to the end of the previous |
| * line if the cursor is at the beginning of a line. |
| */ |
| void doSelectionCursorPrevious() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| caretAlignment = OFFSET_LEADING; |
| if (offsetInLine > 0) { |
| caretOffset = getClusterPrevious(caretOffset, caretLine); |
| showCaret(); |
| } else if (caretLine > 0) { |
| caretLine--; |
| lineOffset = content.getOffsetAtLine(caretLine); |
| caretOffset = lineOffset + content.getLine(caretLine).length(); |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret one line down and to the same character offset relative |
| * to the beginning of the line. Moves the caret to the end of the new line |
| * if the new line is shorter than the character offset. |
| * Moves the caret to the end of the text if the caret already is on the |
| * last line. |
| * Adjusts the selection according to the caret change. This can either add |
| * to or subtract from the old selection, depending on the previous selection |
| * direction. |
| */ |
| void doSelectionLineDown() { |
| int oldColumnX = columnX = getPointAtOffset(caretOffset).x; |
| doLineDown(true); |
| columnX = oldColumnX; |
| } |
| /** |
| * Moves the caret one line up and to the same character offset relative |
| * to the beginning of the line. Moves the caret to the end of the new line |
| * if the new line is shorter than the character offset. |
| * Moves the caret to the beginning of the document if it is already on the |
| * first line. |
| * Adjusts the selection according to the caret change. This can either add |
| * to or subtract from the old selection, depending on the previous selection |
| * direction. |
| */ |
| void doSelectionLineUp() { |
| int oldColumnX = columnX = getPointAtOffset(caretOffset).x; |
| doLineUp(true); |
| columnX = oldColumnX; |
| } |
| /** |
| * Scrolls one page down so that the last line (truncated or whole) |
| * of the current page becomes the fully visible top line. |
| * <p> |
| * The caret is scrolled the same number of lines so that its location |
| * relative to the top line remains the same. The exception is the end |
| * of the text where a full page scroll is not possible. In this case |
| * the caret is moved after the last character. |
| * <p></p> |
| * Adjusts the selection according to the caret change. This can either add |
| * to or subtract from the old selection, depending on the previous selection |
| * direction. |
| * </p> |
| */ |
| void doSelectionPageDown(int pixels) { |
| int oldColumnX = columnX = getPointAtOffset(caretOffset).x; |
| doPageDown(true, pixels); |
| columnX = oldColumnX; |
| } |
| /** |
| * Scrolls one page up so that the first line (truncated or whole) |
| * of the current page becomes the fully visible last line. |
| * <p> |
| * The caret is scrolled the same number of lines so that its location |
| * relative to the top line remains the same. The exception is the beginning |
| * of the text where a full page scroll is not possible. In this case the |
| * caret is moved in front of the first character. |
| * </p><p> |
| * Adjusts the selection according to the caret change. This can either add |
| * to or subtract from the old selection, depending on the previous selection |
| * direction. |
| * </p> |
| */ |
| void doSelectionPageUp(int pixels) { |
| int oldColumnX = columnX = getPointAtOffset(caretOffset).x; |
| doPageUp(true, pixels); |
| columnX = oldColumnX; |
| } |
| /** |
| * Moves the caret to the end of the next word . |
| */ |
| void doSelectionWordNext() { |
| int newCaretOffset = getWordEnd(caretOffset); |
| // Force symmetrical movement for word next and previous. Fixes 14536 |
| caretAlignment = OFFSET_LEADING; |
| // don't change caret position if in single line mode and the cursor |
| // would be on a different line. fixes 5673 |
| if (!isSingleLine() || |
| content.getLineAtOffset(caretOffset) == content.getLineAtOffset(newCaretOffset)) { |
| caretOffset = newCaretOffset; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the start of the previous word. |
| */ |
| void doSelectionWordPrevious() { |
| caretAlignment = OFFSET_LEADING; |
| caretOffset = getWordStart(caretOffset); |
| int caretLine = content.getLineAtOffset(caretOffset); |
| // word previous always comes from bottom line. when |
| // wrapping lines, stay on bottom line when on line boundary |
| if (wordWrap && caretLine < content.getLineCount() - 1 && |
| caretOffset == content.getOffsetAtLine(caretLine + 1)) { |
| caretLine++; |
| } |
| showCaret(); |
| } |
| /** |
| * Moves the caret one character to the left. Do not go to the previous line. |
| * When in a bidi locale and at a R2L character the caret is moved to the |
| * beginning of the R2L segment (visually right) and then one character to the |
| * left (visually left because it's now in a L2R segment). |
| */ |
| void doVisualPrevious() { |
| caretOffset = getClusterPrevious(caretOffset, getCaretLine()); |
| showCaret(); |
| } |
| /** |
| * Moves the caret one character to the right. Do not go to the next line. |
| * When in a bidi locale and at a R2L character the caret is moved to the |
| * end of the R2L segment (visually left) and then one character to the |
| * right (visually right because it's now in a L2R segment). |
| */ |
| void doVisualNext() { |
| caretOffset = getClusterNext(caretOffset, getCaretLine()); |
| showCaret(); |
| } |
| /** |
| * Moves the caret to the end of the next word. |
| * If a selection exists, move the caret to the end of the selection |
| * and remove the selection. |
| */ |
| void doWordNext() { |
| if (selection.y - selection.x > 0) { |
| caretOffset = selection.y; |
| showCaret(); |
| } else { |
| doSelectionWordNext(); |
| } |
| } |
| /** |
| * Moves the caret to the start of the previous word. |
| * If a selection exists, move the caret to the start of the selection |
| * and remove the selection. |
| */ |
| void doWordPrevious() { |
| if (selection.y - selection.x > 0) { |
| caretOffset = selection.x; |
| showCaret(); |
| } else { |
| doSelectionWordPrevious(); |
| } |
| } |
| /** |
| * Ends the autoscroll process. |
| */ |
| void endAutoScroll() { |
| autoScrollDirection = SWT.NULL; |
| } |
| public Color getBackground() { |
| checkWidget(); |
| if (background == null) { |
| return getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND); |
| } |
| return background; |
| } |
| /** |
| * Returns the baseline, in pixels. |
| * |
| * Note: this API should not be used if a StyleRange attribute causes lines to |
| * have different heights (i.e. different fonts, rise, etc). |
| * |
| * @return baseline the baseline |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 3.0 |
| * |
| * @see #getBaseline(int) |
| */ |
| public int getBaseline() { |
| checkWidget(); |
| return renderer.getBaseline(); |
| } |
| /** |
| * Returns the baseline at the given offset, in pixels. |
| * |
| * @param offset the offset |
| * |
| * @return baseline the baseline |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the offset is outside the valid range (< 0 or > getCharCount())</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public int getBaseline(int offset) { |
| checkWidget(); |
| if (!(0 <= offset && offset <= content.getCharCount())) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (isFixedLineHeight()) { |
| return renderer.getBaseline(); |
| } |
| int lineIndex = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int lineInParagraph = layout.getLineIndex(Math.min(offset - lineOffset, layout.getText().length())); |
| FontMetrics metrics = layout.getLineMetrics(lineInParagraph); |
| renderer.disposeTextLayout(layout); |
| return metrics.getAscent() + metrics.getLeading(); |
| } |
| /** |
| * Gets the BIDI coloring mode. When true the BIDI text display |
| * algorithm is applied to segments of text that are the same |
| * color. |
| * |
| * @return the current coloring mode |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @deprecated use BidiSegmentListener instead. |
| */ |
| public boolean getBidiColoring() { |
| checkWidget(); |
| return bidiColoring; |
| } |
| /** |
| * Returns the index of the last fully visible line. |
| * |
| * @return index of the last fully visible line. |
| */ |
| int getBottomIndex() { |
| int bottomIndex; |
| if (isFixedLineHeight()) { |
| int lineCount = 1; |
| int lineHeight = renderer.getLineHeight(); |
| if (lineHeight != 0) { |
| // calculate the number of lines that are fully visible |
| int partialTopLineHeight = topIndex * lineHeight - getVerticalScrollOffset(); |
| lineCount = (clientAreaHeight - partialTopLineHeight) / lineHeight; |
| } |
| bottomIndex = Math.min(content.getLineCount() - 1, topIndex + Math.max(0, lineCount - 1)); |
| } else { |
| int clientAreaHeight = this.clientAreaHeight - bottomMargin; |
| bottomIndex = getLineIndex(clientAreaHeight); |
| if (bottomIndex > 0) { |
| int linePixel = getLinePixel(bottomIndex); |
| int lineHeight = renderer.getLineHeight(bottomIndex); |
| if (linePixel + lineHeight > clientAreaHeight) { |
| if (getLinePixel(bottomIndex - 1) >= topMargin) { |
| bottomIndex--; |
| } |
| } |
| } |
| } |
| return bottomIndex; |
| } |
| Rectangle getBoundsAtOffset(int offset) { |
| int lineIndex = content.getLineAtOffset(offset); |
| String line = content.getLine(lineIndex); |
| Rectangle bounds; |
| if (line.length() != 0) { |
| int offsetInLine = offset - content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| bounds = layout.getBounds(offsetInLine, offsetInLine); |
| renderer.disposeTextLayout(layout); |
| } else { |
| bounds = new Rectangle (0, 0, 0, renderer.getLineHeight()); |
| } |
| bounds.x += leftMargin - horizontalScrollOffset; |
| bounds.y += getLinePixel(lineIndex); |
| return bounds; |
| } |
| |
| /** |
| * Returns the caret position relative to the start of the text. |
| * |
| * @return the caret position relative to the start of the text. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getCaretOffset() { |
| checkWidget(); |
| return caretOffset; |
| } |
| /** |
| * Returns the caret width. |
| * |
| * @return the caret width, 0 if caret is null. |
| */ |
| int getCaretWidth() { |
| Caret caret = getCaret(); |
| if (caret == null) return 0; |
| return caret.getSize().x; |
| } |
| Object getClipboardContent(int clipboardType) { |
| TextTransfer plainTextTransfer = TextTransfer.getInstance(); |
| return clipboard.getContents(plainTextTransfer, clipboardType); |
| } |
| int getClusterNext(int offset, int lineIndex) { |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| offset -= lineOffset; |
| offset = layout.getNextOffset(offset, SWT.MOVEMENT_CLUSTER); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| return offset; |
| } |
| int getClusterPrevious(int offset, int lineIndex) { |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| offset -= lineOffset; |
| offset = layout.getPreviousOffset(offset, SWT.MOVEMENT_CLUSTER); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| return offset; |
| } |
| /** |
| * Returns the content implementation that is used for text storage |
| * or null if no user defined content implementation has been set. |
| * |
| * @return content implementation that is used for text storage or null |
| * if no user defined content implementation has been set. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public StyledTextContent getContent() { |
| checkWidget(); |
| return content; |
| } |
| /** |
| * Returns whether the widget implements double click mouse behavior. |
| * |
| * @return true if double clicking a word selects the word, false if double clicks |
| * have the same effect as regular mouse clicks |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public boolean getDoubleClickEnabled() { |
| checkWidget(); |
| return doubleClickEnabled; |
| } |
| /** |
| * Returns whether the widget content can be edited. |
| * |
| * @return true if content can be edited, false otherwise |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public boolean getEditable() { |
| checkWidget(); |
| return editable; |
| } |
| public Color getForeground() { |
| checkWidget(); |
| if (foreground == null) { |
| return getDisplay().getSystemColor(SWT.COLOR_LIST_FOREGROUND); |
| } |
| return foreground; |
| } |
| /** |
| * Returns the horizontal scroll increment. |
| * |
| * @return horizontal scroll increment. |
| */ |
| int getHorizontalIncrement() { |
| GC gc = new GC(this); |
| int increment = gc.getFontMetrics().getAverageCharWidth(); |
| gc.dispose(); |
| return increment; |
| } |
| /** |
| * Returns the horizontal scroll offset relative to the start of the line. |
| * |
| * @return horizontal scroll offset relative to the start of the line, |
| * measured in character increments starting at 0, if > 0 the content is scrolled |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getHorizontalIndex() { |
| checkWidget(); |
| return horizontalScrollOffset / getHorizontalIncrement(); |
| } |
| /** |
| * Returns the horizontal scroll offset relative to the start of the line. |
| * |
| * @return the horizontal scroll offset relative to the start of the line, |
| * measured in pixel starting at 0, if > 0 the content is scrolled. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getHorizontalPixel() { |
| checkWidget(); |
| return horizontalScrollOffset; |
| } |
| /** |
| * Returns the line indentation of the widget. |
| * |
| * @return the line indentation |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getLineIndent(int) |
| * |
| * @since 3.2 |
| */ |
| public int getIndent() { |
| checkWidget(); |
| return indent; |
| } |
| /** |
| * Returns whether the widget justifies lines. |
| * |
| * @return whether lines are justified |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getLineJustify(int) |
| * |
| * @since 3.2 |
| */ |
| public boolean getJustify() { |
| checkWidget(); |
| return justify; |
| } |
| /** |
| * Returns the action assigned to the key. |
| * Returns SWT.NULL if there is no action associated with the key. |
| * |
| * @param key a key code defined in SWT.java or a character. |
| * Optionally ORd with a state mask. Preferred state masks are one or more of |
| * SWT.MOD1, SWT.MOD2, SWT.MOD3, since these masks account for modifier platform |
| * differences. However, there may be cases where using the specific state masks |
| * (i.e., SWT.CTRL, SWT.SHIFT, SWT.ALT, SWT.COMMAND) makes sense. |
| * @return one of the predefined actions defined in ST.java or SWT.NULL |
| * if there is no action associated with the key. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getKeyBinding(int key) { |
| checkWidget(); |
| Integer action = (Integer) keyActionMap.get(new Integer(key)); |
| return action == null ? SWT.NULL : action.intValue(); |
| } |
| /** |
| * Gets the number of characters. |
| * |
| * @return number of characters in the widget |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getCharCount() { |
| checkWidget(); |
| return content.getCharCount(); |
| } |
| /** |
| * Returns the alignment of the line at the given index. |
| * |
| * @param index the index of the line |
| * |
| * @return the line alignment |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the index is invalid</li> |
| * </ul> |
| * |
| * @see #getAlignment() |
| * |
| * @since 3.2 |
| */ |
| public int getLineAlignment(int index) { |
| checkWidget(); |
| if (index < 0 || index > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return renderer.getLineAlignment(index, alignment); |
| } |
| /** |
| * Returns the line at the specified offset in the text |
| * where 0 <= offset <= getCharCount() so that getLineAtOffset(getCharCount()) |
| * returns the line of the insert location. |
| * |
| * @param offset offset relative to the start of the content. |
| * 0 <= offset <= getCharCount() |
| * @return line at the specified offset in the text |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the offset is outside the valid range (< 0 or > getCharCount())</li> |
| * </ul> |
| */ |
| public int getLineAtOffset(int offset) { |
| checkWidget(); |
| if (offset < 0 || offset > getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return content.getLineAtOffset(offset); |
| } |
| /** |
| * Returns the background color of the line at the given index. |
| * Returns null if a LineBackgroundListener has been set or if no background |
| * color has been specified for the line. Should not be called if a |
| * LineBackgroundListener has been set since the listener maintains the |
| * line background colors. |
| * |
| * @param index the index of the line |
| * @return the background color of the line at the given index. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the index is invalid</li> |
| * </ul> |
| */ |
| public Color getLineBackground(int index) { |
| checkWidget(); |
| if (index < 0 || index > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return isListening(LineGetBackground) ? null : renderer.getLineBackground(index, null); |
| } |
| /** |
| * Returns the bullet of the line at the given index. |
| * |
| * @param index the index of the line |
| * |
| * @return the line bullet |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the index is invalid</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public Bullet getLineBullet(int index) { |
| checkWidget(); |
| if (index < 0 || index > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return isListening(LineGetStyle) ? null : renderer.getLineBullet(index, null); |
| } |
| /** |
| * Returns the line background data for the given line or null if |
| * there is none. |
| * |
| * @param lineOffset offset of the line start relative to the start |
| * of the content. |
| * @param line line to get line background data for |
| * @return line background data for the given line. |
| */ |
| StyledTextEvent getLineBackgroundData(int lineOffset, String line) { |
| return sendLineEvent(LineGetBackground, lineOffset, line); |
| } |
| /** |
| * Gets the number of text lines. |
| * |
| * @return the number of lines in the widget |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getLineCount() { |
| checkWidget(); |
| return content.getLineCount(); |
| } |
| /** |
| * Returns the number of lines that can be completely displayed in the |
| * widget client area. |
| * |
| * @return number of lines that can be completely displayed in the widget |
| * client area. |
| */ |
| int getLineCountWhole() { |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| return lineHeight != 0 ? clientAreaHeight / lineHeight : 1; |
| } |
| return getBottomIndex() - topIndex + 1; |
| } |
| /** |
| * Returns the line delimiter used for entering new lines by key down |
| * or paste operation. |
| * |
| * @return line delimiter used for entering new lines by key down |
| * or paste operation. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getLineDelimiter() { |
| checkWidget(); |
| return content.getLineDelimiter(); |
| } |
| /** |
| * Returns the line height. |
| * <p> |
| * Note: this API should not be used if a StyleRange attribute causes lines to |
| * have different heights (i.e. different fonts, rise, etc). |
| * </p> |
| * |
| * @return line height in pixel. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @see #getLineHeight(int) |
| */ |
| public int getLineHeight() { |
| checkWidget(); |
| return renderer.getLineHeight(); |
| } |
| /** |
| * Returns the line height at the given offset. |
| * |
| * @param offset the offset |
| * |
| * @return line height in pixels |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the offset is outside the valid range (< 0 or > getCharCount())</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public int getLineHeight(int offset) { |
| checkWidget(); |
| if (!(0 <= offset && offset <= content.getCharCount())) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (isFixedLineHeight()) { |
| return renderer.getLineHeight(); |
| } |
| int lineIndex = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int lineInParagraph = layout.getLineIndex(Math.min(offset - lineOffset, layout.getText().length())); |
| int height = layout.getLineBounds(lineInParagraph).height; |
| renderer.disposeTextLayout(layout); |
| return height; |
| } |
| /** |
| * Returns the indentation of the line at the given index. |
| * |
| * @param index the index of the line |
| * |
| * @return the line indentation |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the index is invalid</li> |
| * </ul> |
| * |
| * @see #getIndent() |
| * |
| * @since 3.2 |
| */ |
| public int getLineIndent(int index) { |
| checkWidget(); |
| if (index < 0 || index > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return isListening(LineGetStyle) ? 0 : renderer.getLineIndent(index, indent); |
| } |
| /** |
| * Returns whether the line at the given index is justified. |
| * |
| * @param index the index of the line |
| * |
| * @return whether the line is justified |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the index is invalid</li> |
| * </ul> |
| * |
| * @see #getJustify() |
| * |
| * @since 3.2 |
| */ |
| public boolean getLineJustify(int index) { |
| checkWidget(); |
| if (index < 0 || index > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return isListening(LineGetStyle) ? false : renderer.getLineJustify(index, justify); |
| } |
| /** |
| * Returns the line spacing of the widget. |
| * |
| * @return the line spacing |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public int getLineSpacing() { |
| checkWidget(); |
| return lineSpacing; |
| } |
| /** |
| * Returns the line style data for the given line or null if there is |
| * none. |
| * <p> |
| * If there is a LineStyleListener but it does not set any styles, |
| * the StyledTextEvent.styles field will be initialized to an empty |
| * array. |
| * </p> |
| * |
| * @param lineOffset offset of the line start relative to the start of |
| * the content. |
| * @param line line to get line styles for |
| * @return line style data for the given line. Styles may start before |
| * line start and end after line end |
| */ |
| StyledTextEvent getLineStyleData(int lineOffset, String line) { |
| return sendLineEvent(LineGetStyle, lineOffset, line); |
| } |
| /** |
| * Returns the top pixel, relative to the client area, of a given line. |
| * Clamps out of ranges index. |
| * |
| * @param lineIndex the line index, the max value is lineCount. If |
| * lineIndex == lineCount it returns the bottom pixel of the last line. |
| * It means this function can be used to retrieve the bottom pixel of any line. |
| * |
| * @since 3.2 |
| */ |
| public int getLinePixel(int lineIndex) { |
| checkWidget(); |
| int lineCount = content.getLineCount(); |
| lineIndex = Math.max(0, Math.min(lineCount, lineIndex)); |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| return lineIndex * lineHeight - getVerticalScrollOffset() + topMargin; |
| } |
| if (lineIndex == topIndex) return topIndexY + topMargin; |
| int height = topIndexY; |
| if (lineIndex > topIndex) { |
| for (int i = topIndex; i < lineIndex; i++) { |
| height += renderer.getLineHeight(i); |
| } |
| } else { |
| for (int i = topIndex - 1; i >= lineIndex; i--) { |
| height -= renderer.getLineHeight(i); |
| } |
| } |
| return height + topMargin; |
| } |
| /** |
| * Returns the line index for a y, relative to the client area. |
| * The line index returned is always in the range 0..lineCount - 1. |
| * |
| * @since 3.2 |
| */ |
| public int getLineIndex(int y) { |
| checkWidget(); |
| y -= topMargin; |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| int lineIndex = (y + getVerticalScrollOffset()) / lineHeight; |
| int lineCount = content.getLineCount(); |
| lineIndex = Math.max(0, Math.min(lineCount - 1, lineIndex)); |
| return lineIndex; |
| } |
| if (y == topIndexY) return topIndex; |
| int line = topIndex; |
| if (y < topIndexY) { |
| while (y < topIndexY && line > 0) { |
| y += renderer.getLineHeight(--line); |
| } |
| } else { |
| int lineCount = content.getLineCount(); |
| int lineHeight = renderer.getLineHeight(line); |
| while (y - lineHeight >= topIndexY && line < lineCount - 1) { |
| y -= lineHeight; |
| lineHeight = renderer.getLineHeight(++line); |
| } |
| } |
| return line; |
| } |
| /** |
| * Returns the x, y location of the upper left corner of the character |
| * bounding box at the specified offset in the text. The point is |
| * relative to the upper left corner of the widget client area. |
| * |
| * @param offset offset relative to the start of the content. |
| * 0 <= offset <= getCharCount() |
| * @return x, y location of the upper left corner of the character |
| * bounding box at the specified offset in the text. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the offset is outside the valid range (< 0 or > getCharCount())</li> |
| * </ul> |
| */ |
| public Point getLocationAtOffset(int offset) { |
| checkWidget(); |
| if (offset < 0 || offset > getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return getPointAtOffset(offset); |
| } |
| /** |
| * Returns the character offset of the first character of the given line. |
| * |
| * @param lineIndex index of the line, 0 based relative to the first |
| * line in the content. 0 <= lineIndex < getLineCount(), except |
| * lineIndex may always be 0 |
| * @return offset offset of the first character of the line, relative to |
| * the beginning of the document. The first character of the document is |
| * at offset 0. |
| * When there are not any lines, getOffsetAtLine(0) is a valid call that |
| * answers 0. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the offset is outside the valid range (< 0 or > getCharCount())</li> |
| * </ul> |
| * @since 2.0 |
| */ |
| public int getOffsetAtLine(int lineIndex) { |
| checkWidget(); |
| if (lineIndex < 0 || |
| (lineIndex > 0 && lineIndex >= content.getLineCount())) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return content.getOffsetAtLine(lineIndex); |
| } |
| /** |
| * Returns the offset of the character at the given location relative |
| * to the first character in the document. |
| * <p> |
| * The return value reflects the character offset that the caret will |
| * be placed at if a mouse click occurred at the specified location. |
| * If the x coordinate of the location is beyond the center of a character |
| * the returned offset will be behind the character. |
| * </p> |
| * |
| * @param point the origin of character bounding box relative to |
| * the origin of the widget client area. |
| * @return offset of the character at the given location relative |
| * to the first character in the document. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when point is null</li> |
| * <li>ERROR_INVALID_ARGUMENT when there is no character at the specified location</li> |
| * </ul> |
| */ |
| public int getOffsetAtLocation(Point point) { |
| checkWidget(); |
| if (point == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| // is y above first line or is x before first column? |
| if (point.y + getVerticalScrollOffset() < 0 || point.x + horizontalScrollOffset < 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| int bottomIndex = getLineIndex(clientAreaHeight); |
| int height = getLinePixel(bottomIndex) + renderer.getLineHeight(bottomIndex); |
| if (point.y > height) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| int lineIndex = getLineIndex(point.y); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int[] trailing = new int[1]; |
| int x = point.x + horizontalScrollOffset - leftMargin ; |
| int y = point.y - getLinePixel(lineIndex); |
| int offsetInLine = layout.getOffset(x, y, trailing); |
| String line = content.getLine(lineIndex); |
| if (offsetInLine != line.length() - 1) { |
| offsetInLine = Math.min(line.length(), offsetInLine + trailing[0]); |
| } |
| Rectangle rect = layout.getLineBounds(layout.getLineIndex(offsetInLine)); |
| renderer.disposeTextLayout(layout); |
| if (x > rect.x + rect.width) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| return lineOffset + offsetInLine; |
| } |
| int getOffsetAtPoint(int x, int y) { |
| int lineIndex = getLineIndex(y); |
| y -= getLinePixel(lineIndex); |
| return getOffsetAtPoint(x, y, lineIndex); |
| } |
| /** |
| * Returns the offset at the specified x location in the specified line. |
| * |
| * @param x x location of the mouse location |
| * @param line line the mouse location is in |
| * @return the offset at the specified x location in the specified line, |
| * relative to the beginning of the document |
| */ |
| int getOffsetAtPoint(int x, int y, int lineIndex) { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| x += horizontalScrollOffset - leftMargin; |
| int[] trailing = new int[1]; |
| int offsetInLine = layout.getOffset(x, y, trailing); |
| caretAlignment = OFFSET_LEADING; |
| if (trailing[0] != 0) { |
| int lineInParagraph = layout.getLineIndex(offsetInLine + trailing[0]); |
| //TODO handle bidi text |
| int lineStart = layout.getLineOffsets()[lineInParagraph]; |
| if (offsetInLine + trailing[0] == lineStart) { |
| offsetInLine += trailing[0]; |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| } else { |
| String line = content.getLine(lineIndex); |
| int level; |
| int offset = offsetInLine; |
| while (offset > 0 && Character.isDigit(line.charAt(offset))) offset--; |
| if (offset == 0 && Character.isDigit(line.charAt(offset))) { |
| level = isMirrored() ? 1 : 0; |
| } else { |
| level = layout.getLevel(offset) & 0x1; |
| } |
| offsetInLine += trailing[0]; |
| int trailingLevel = layout.getLevel(offsetInLine) & 0x1; |
| if ((level ^ trailingLevel) != 0) { |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| } else { |
| caretAlignment = OFFSET_LEADING; |
| } |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| return offsetInLine + content.getOffsetAtLine(lineIndex); |
| } |
| /** |
| * Returns the orientation of the receiver. |
| * |
| * @return the orientation style |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 2.1.2 |
| */ |
| public int getOrientation () { |
| checkWidget(); |
| return isMirrored() ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT; |
| } |
| /** |
| * Returns the index of the last partially visible line. |
| * |
| * @return index of the last partially visible line. |
| */ |
| int getPartialBottomIndex() { |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| int partialLineCount = Compatibility.ceil(clientAreaHeight, lineHeight); |
| return Math.min(content.getLineCount(), topIndex + partialLineCount) - 1; |
| } |
| return getLineIndex(clientAreaHeight - bottomMargin); |
| } |
| /** |
| * Returns the index of the first partially visible line. |
| * |
| * @return index of the first partially visible line. |
| */ |
| int getPartialTopIndex() { |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| return getVerticalScrollOffset() / lineHeight; |
| } |
| return topIndexY <= 0 ? topIndex : topIndex - 1; |
| } |
| /** |
| * Returns the content in the specified range using the platform line |
| * delimiter to separate lines. |
| * |
| * @param writer the TextWriter to write line text into |
| * @return the content in the specified range using the platform line |
| * delimiter to separate lines as written by the specified TextWriter. |
| */ |
| String getPlatformDelimitedText(TextWriter writer) { |
| int end = writer.getStart() + writer.getCharCount(); |
| int startLine = content.getLineAtOffset(writer.getStart()); |
| int endLine = content.getLineAtOffset(end); |
| String endLineText = content.getLine(endLine); |
| int endLineOffset = content.getOffsetAtLine(endLine); |
| |
| for (int i = startLine; i <= endLine; i++) { |
| writer.writeLine(content.getLine(i), content.getOffsetAtLine(i)); |
| if (i < endLine) { |
| writer.writeLineDelimiter(PlatformLineDelimiter); |
| } |
| } |
| if (end > endLineOffset + endLineText.length()) { |
| writer.writeLineDelimiter(PlatformLineDelimiter); |
| } |
| writer.close(); |
| return writer.toString(); |
| } |
| /** |
| * Returns all the ranges of text that have an associated StyleRange. |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * <p> |
| * The ranges array contains start and length pairs. Each pair refers to |
| * the corresponding style in the styles array. For example, the pair |
| * that starts at ranges[n] with length ranges[n+1] uses the style |
| * at styles[n/2] returned by <code>getStyleRanges(int, int, boolean)</code>. |
| * </p> |
| * |
| * @return the ranges or an empty array if a LineStyleListener has been set. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 3.2 |
| * |
| * @see #getStyleRanges(boolean) |
| */ |
| public int[] getRanges() { |
| checkWidget(); |
| if (!isListening(LineGetStyle)) { |
| int[] ranges = renderer.getRanges(0, content.getCharCount()); |
| if (ranges != null) return ranges; |
| } |
| return new int[0]; |
| } |
| /** |
| * Returns the ranges of text that have an associated StyleRange. |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * <p> |
| * The ranges array contains start and length pairs. Each pair refers to |
| * the corresponding style in the styles array. For example, the pair |
| * that starts at ranges[n] with length ranges[n+1] uses the style |
| * at styles[n/2] returned by <code>getStyleRanges(int, int, boolean)</code>. |
| * </p> |
| * |
| * @param start the start offset of the style ranges to return |
| * @param length the number of style ranges to return |
| * |
| * @return the ranges or an empty array if a LineStyleListener has been set. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE if start or length are outside the widget content</li> |
| * </ul> |
| * |
| * @since 3.2 |
| * |
| * @see #getStyleRanges(int, int, boolean) |
| */ |
| public int[] getRanges(int start, int length) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| int end = start + length; |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (!isListening(LineGetStyle)) { |
| int[] ranges = renderer.getRanges(start, length); |
| if (ranges != null) return ranges; |
| } |
| return new int[0]; |
| } |
| /** |
| * Returns the selection. |
| * <p> |
| * Text selections are specified in terms of caret positions. In a text |
| * widget that contains N characters, there are N+1 caret positions, |
| * ranging from 0..N |
| * </p> |
| * |
| * @return start and end of the selection, x is the offset of the first |
| * selected character, y is the offset after the last selected character. |
| * The selection values returned are visual (i.e., x will always always be |
| * <= y). To determine if a selection is right-to-left (RtoL) vs. left-to-right |
| * (LtoR), compare the caretOffset to the start and end of the selection |
| * (e.g., caretOffset == start of selection implies that the selection is RtoL). |
| * @see #getSelectionRange |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public Point getSelection() { |
| checkWidget(); |
| return new Point(selection.x, selection.y); |
| } |
| /** |
| * Returns the selection. |
| * |
| * @return start and length of the selection, x is the offset of the |
| * first selected character, relative to the first character of the |
| * widget content. y is the length of the selection. |
| * The selection values returned are visual (i.e., length will always always be |
| * positive). To determine if a selection is right-to-left (RtoL) vs. left-to-right |
| * (LtoR), compare the caretOffset to the start and end of the selection |
| * (e.g., caretOffset == start of selection implies that the selection is RtoL). |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public Point getSelectionRange() { |
| checkWidget(); |
| return new Point(selection.x, selection.y - selection.x); |
| } |
| /** |
| * Returns the receiver's selection background color. |
| * |
| * @return the selection background color |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.1 |
| */ |
| public Color getSelectionBackground() { |
| checkWidget(); |
| if (selectionBackground == null) { |
| return getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION); |
| } |
| return selectionBackground; |
| } |
| /** |
| * Gets the number of selected characters. |
| * |
| * @return the number of selected characters. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getSelectionCount() { |
| checkWidget(); |
| return getSelectionRange().y; |
| } |
| /** |
| * Returns the receiver's selection foreground color. |
| * |
| * @return the selection foreground color |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.1 |
| */ |
| public Color getSelectionForeground() { |
| checkWidget(); |
| if (selectionForeground == null) { |
| return getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT); |
| } |
| return selectionForeground; |
| } |
| /** |
| * Returns the selected text. |
| * |
| * @return selected text, or an empty String if there is no selection. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getSelectionText() { |
| checkWidget(); |
| return content.getTextRange(selection.x, selection.y - selection.x); |
| } |
| public int getStyle() { |
| int style = super.getStyle(); |
| style &= ~(SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT | SWT.MIRRORED); |
| if (isMirrored()) { |
| style |= SWT.RIGHT_TO_LEFT | SWT.MIRRORED; |
| } else { |
| style |= SWT.LEFT_TO_RIGHT; |
| } |
| return style; |
| } |
| |
| /** |
| * Returns the text segments that should be treated as if they |
| * had a different direction than the surrounding text. |
| * |
| * @param lineOffset offset of the first character in the line. |
| * 0 based from the beginning of the document. |
| * @param line text of the line to specify bidi segments for |
| * @return text segments that should be treated as if they had a |
| * different direction than the surrounding text. Only the start |
| * index of a segment is specified, relative to the start of the |
| * line. Always starts with 0 and ends with the line length. |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the segment indices returned |
| * by the listener do not start with 0, are not in ascending order, |
| * exceed the line length or have duplicates</li> |
| * </ul> |
| */ |
| int [] getBidiSegments(int lineOffset, String line) { |
| if (!isBidi()) return null; |
| if (!isListening(LineGetSegments)) { |
| return getBidiSegmentsCompatibility(line, lineOffset); |
| } |
| StyledTextEvent event = sendLineEvent(LineGetSegments, lineOffset, line); |
| int lineLength = line.length(); |
| int[] segments; |
| if (event == null || event.segments == null || event.segments.length == 0) { |
| segments = new int[] {0, lineLength}; |
| } else { |
| int segmentCount = event.segments.length; |
| |
| // test segment index consistency |
| if (event.segments[0] != 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| for (int i = 1; i < segmentCount; i++) { |
| if (event.segments[i] <= event.segments[i - 1] || event.segments[i] > lineLength) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| // ensure that last segment index is line end offset |
| if (event.segments[segmentCount - 1] != lineLength) { |
| segments = new int[segmentCount + 1]; |
| System.arraycopy(event.segments, 0, segments, 0, segmentCount); |
| segments[segmentCount] = lineLength; |
| } else { |
| segments = event.segments; |
| } |
| } |
| return segments; |
| } |
| /** |
| * @see #getBidiSegments |
| * Supports deprecated setBidiColoring API. Remove when API is removed. |
| */ |
| int [] getBidiSegmentsCompatibility(String line, int lineOffset) { |
| int lineLength = line.length(); |
| if (!bidiColoring) { |
| return new int[] {0, lineLength}; |
| } |
| StyleRange [] styles = null; |
| StyledTextEvent event = getLineStyleData(lineOffset, line); |
| if (event != null) { |
| styles = event.styles; |
| } else { |
| styles = renderer.getStyleRanges(lineOffset, lineLength, true); |
| } |
| if (styles == null || styles.length == 0) { |
| return new int[] {0, lineLength}; |
| } |
| int k=0, count = 1; |
| while (k < styles.length && styles[k].start == 0 && styles[k].length == lineLength) { |
| k++; |
| } |
| int[] offsets = new int[(styles.length - k) * 2 + 2]; |
| for (int i = k; i < styles.length; i++) { |
| StyleRange style = styles[i]; |
| int styleLineStart = Math.max(style.start - lineOffset, 0); |
| int styleLineEnd = Math.max(style.start + style.length - lineOffset, styleLineStart); |
| styleLineEnd = Math.min (styleLineEnd, line.length ()); |
| if (i > 0 && count > 1 && |
| ((styleLineStart >= offsets[count-2] && styleLineStart <= offsets[count-1]) || |
| (styleLineEnd >= offsets[count-2] && styleLineEnd <= offsets[count-1])) && |
| style.similarTo(styles[i-1])) { |
| offsets[count-2] = Math.min(offsets[count-2], styleLineStart); |
| offsets[count-1] = Math.max(offsets[count-1], styleLineEnd); |
| } else { |
| if (styleLineStart > offsets[count - 1]) { |
| offsets[count] = styleLineStart; |
| count++; |
| } |
| offsets[count] = styleLineEnd; |
| count++; |
| } |
| } |
| // add offset for last non-colored segment in line, if any |
| if (lineLength > offsets[count-1]) { |
| offsets [count] = lineLength; |
| count++; |
| } |
| if (count == offsets.length) { |
| return offsets; |
| } |
| int [] result = new int [count]; |
| System.arraycopy (offsets, 0, result, 0, count); |
| return result; |
| } |
| /** |
| * Returns the style range at the given offset. |
| * <p> |
| * Returns null if a LineStyleListener has been set or if a style is not set |
| * for the offset. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param offset the offset to return the style for. |
| * 0 <= offset < getCharCount() must be true. |
| * @return a StyleRange with start == offset and length == 1, indicating |
| * the style at the given offset. null if a LineStyleListener has been set |
| * or if a style is not set for the given offset. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the offset is invalid</li> |
| * </ul> |
| */ |
| public StyleRange getStyleRangeAtOffset(int offset) { |
| checkWidget(); |
| if (offset < 0 || offset >= getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| if (!isListening(LineGetStyle)) { |
| StyleRange[] ranges = renderer.getStyleRanges(offset, 1, true); |
| if (ranges != null) return ranges[0]; |
| } |
| return null; |
| } |
| /** |
| * Returns the styles. |
| * <p> |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * <p></p> |
| * Note: Because a StyleRange includes the start and length, the |
| * same instance cannot occur multiple times in the array of styles. |
| * If the same style attributes, such as font and color, occur in |
| * multiple StyleRanges, <code>getStyleRanges(boolean)</code> |
| * can be used to get the styles without the ranges. |
| * </p> |
| * |
| * @return the styles or an empty array if a LineStyleListener has been set. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getStyleRanges(boolean) |
| */ |
| public StyleRange[] getStyleRanges() { |
| checkWidget(); |
| return getStyleRanges(0, content.getCharCount(), true); |
| } |
| /** |
| * Returns the styles. |
| * <p> |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p><p> |
| * Note: When <code>includeRanges</code> is true, the start and length |
| * fields of each StyleRange will be valid, however the StyleRange |
| * objects may need to be cloned. When <code>includeRanges</code> is |
| * false, <code>getRanges(int, int)</code> can be used to get the |
| * associated ranges. |
| * </p> |
| * |
| * @param includeRanges whether the start and length field of the StyleRanges should be set. |
| * |
| * @return the styles or an empty array if a LineStyleListener has been set. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 3.2 |
| * |
| * @see #getRanges(int, int) |
| * @see #setStyleRanges(int[], StyleRange[]) |
| */ |
| public StyleRange[] getStyleRanges(boolean includeRanges) { |
| checkWidget(); |
| return getStyleRanges(0, content.getCharCount(), includeRanges); |
| } |
| /** |
| * Returns the styles for the given text range. |
| * <p> |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p><p> |
| * Note: Because the StyleRange includes the start and length, the |
| * same instance cannot occur multiple times in the array of styles. |
| * If the same style attributes, such as font and color, occur in |
| * multiple StyleRanges, <code>getStyleRanges(int, int, boolean)</code> |
| * can be used to get the styles without the ranges. |
| * </p> |
| * @param start the start offset of the style ranges to return |
| * @param length the number of style ranges to return |
| * |
| * @return the styles or an empty array if a LineStyleListener has |
| * been set. The returned styles will reflect the given range. The first |
| * returned <code>StyleRange</code> will have a starting offset >= start |
| * and the last returned <code>StyleRange</code> will have an ending |
| * offset <= start + length - 1 |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or end are outside the widget content</li> |
| * </ul> |
| * |
| * @see #getStyleRanges(int, int, boolean) |
| * |
| * @since 3.0 |
| */ |
| public StyleRange[] getStyleRanges(int start, int length) { |
| checkWidget(); |
| return getStyleRanges(start, length, true); |
| } |
| /** |
| * Returns the styles for the given text range. |
| * <p> |
| * Returns an empty array if a LineStyleListener has been set. |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p><p> |
| * Note: When <code>includeRanges</code> is true, the start and length |
| * fields of each StyleRange will be valid, however the StyleRange |
| * objects may need to be cloned. When <code>includeRanges</code> is |
| * false, <code>getRanges(int, int)</code> can be used to get the |
| * associated ranges. |
| * </p> |
| * |
| * @param start the start offset of the style ranges to return |
| * @param length the number of style ranges to return |
| * @param includeRanges whether the start and length field of the StyleRanges should be set. |
| * |
| * @return the styles or an empty array if a LineStyleListener has |
| * been set. The returned styles will reflect the given range. The first |
| * returned <code>StyleRange</code> will have a starting offset >= start |
| * and the last returned <code>StyleRange</code> will have an ending |
| * offset <= start + length - 1 |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or end are outside the widget content</li> |
| * </ul> |
| * |
| * @since 3.2 |
| * |
| * @see #getRanges(int, int) |
| * @see #setStyleRanges(int[], StyleRange[]) |
| */ |
| public StyleRange[] getStyleRanges(int start, int length, boolean includeRanges) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| int end = start + length; |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (!isListening(LineGetStyle)) { |
| StyleRange[] ranges = renderer.getStyleRanges(start, length, includeRanges); |
| if (ranges != null) return ranges; |
| } |
| return new StyleRange[0]; |
| } |
| /** |
| * Returns the tab width measured in characters. |
| * |
| * @return tab width measured in characters |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getTabs() { |
| checkWidget(); |
| return tabLength; |
| } |
| /** |
| * Returns a copy of the widget content. |
| * |
| * @return copy of the widget content |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getText() { |
| checkWidget(); |
| return content.getTextRange(0, getCharCount()); |
| } |
| /** |
| * Returns the widget content between the two offsets. |
| * |
| * @param start offset of the first character in the returned String |
| * @param end offset of the last character in the returned String |
| * @return widget content starting at start and ending at end |
| * @see #getTextRange(int,int) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or end are outside the widget content</li> |
| * </ul> |
| */ |
| public String getText(int start, int end) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| if (start < 0 || start >= contentLength || end < 0 || end >= contentLength || start > end) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return content.getTextRange(start, end - start + 1); |
| } |
| /** |
| * Returns the smallest bounding rectangle that includes the characters between two offsets. |
| * |
| * @param start offset of the first character included in the bounding box |
| * @param end offset of the last character included in the bounding box |
| * @return bounding box of the text between start and end |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or end are outside the widget content</li> |
| * </ul> |
| * @since 3.1 |
| */ |
| public Rectangle getTextBounds(int start, int end) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| if (start < 0 || start >= contentLength || end < 0 || end >= contentLength || start > end) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| int lineStart = content.getLineAtOffset(start); |
| int lineEnd = content.getLineAtOffset(end); |
| Rectangle rect; |
| int y = getLinePixel(lineStart); |
| int height = 0; |
| int left = 0x7fffffff, right = 0; |
| for (int i = lineStart; i <= lineEnd; i++) { |
| int lineOffset = content.getOffsetAtLine(i); |
| TextLayout layout = renderer.getTextLayout(i); |
| if (i == lineStart && i == lineEnd) { |
| rect = layout.getBounds(start - lineOffset, end - lineOffset); |
| } else if (i == lineStart) { |
| String line = content.getLine(i); |
| rect = layout.getBounds(start - lineOffset, line.length()); |
| } else if (i == lineEnd) { |
| rect = layout.getBounds(0, end - lineOffset); |
| } else { |
| rect = layout.getBounds(); |
| } |
| left = Math.min (left, rect.x); |
| right = Math.max (right, rect.x + rect.width); |
| height += rect.height; |
| renderer.disposeTextLayout(layout); |
| } |
| rect = new Rectangle (left, y, right-left, height); |
| rect.x += leftMargin - horizontalScrollOffset; |
| return rect; |
| } |
| /** |
| * Returns the widget content starting at start for length characters. |
| * |
| * @param start offset of the first character in the returned String |
| * @param length number of characters to return |
| * @return widget content starting at start and extending length characters. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or length are outside the widget content</li> |
| * </ul> |
| */ |
| public String getTextRange(int start, int length) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| int end = start + length; |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return content.getTextRange(start, length); |
| } |
| /** |
| * Returns the maximum number of characters that the receiver is capable of holding. |
| * |
| * @return the text limit |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getTextLimit() { |
| checkWidget(); |
| return textLimit; |
| } |
| /** |
| * Gets the top index. |
| * <p> |
| * The top index is the index of the fully visible line that is currently |
| * at the top of the widget or the topmost partially visible line if no line is fully visible. |
| * The top index changes when the widget is scrolled. Indexing is zero based. |
| * </p> |
| * |
| * @return the index of the top line |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getTopIndex() { |
| checkWidget(); |
| return topIndex; |
| } |
| /** |
| * Gets the top pixel. |
| * <p> |
| * The top pixel is the pixel position of the line that is |
| * currently at the top of the widget. The text widget can be scrolled by pixels |
| * by dragging the scroll thumb so that a partial line may be displayed at the top |
| * the widget. The top pixel changes when the widget is scrolled. The top pixel |
| * does not include the widget trimming. |
| * </p> |
| * |
| * @return pixel position of the top line |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getTopPixel() { |
| checkWidget(); |
| return getVerticalScrollOffset(); |
| } |
| /** |
| * Returns the vertical scroll increment. |
| * |
| * @return vertical scroll increment. |
| */ |
| int getVerticalIncrement() { |
| return renderer.getLineHeight(); |
| } |
| int getVerticalScrollOffset() { |
| if (verticalScrollOffset == -1) { |
| renderer.calculate(0, topIndex); |
| int height = 0; |
| for (int i = 0; i < topIndex; i++) { |
| height += renderer.getLineHeight(i); |
| } |
| height -= topIndexY; |
| verticalScrollOffset = height; |
| } |
| return verticalScrollOffset; |
| } |
| int getVisualLineIndex(TextLayout layout, int offsetInLine) { |
| int lineIndex = layout.getLineIndex(offsetInLine); |
| int[] offsets = layout.getLineOffsets(); |
| if (lineIndex != 0 && offsetInLine == offsets[lineIndex] && caretAlignment == PREVIOUS_OFFSET_TRAILING) { |
| lineIndex--; |
| } |
| return lineIndex; |
| } |
| int getCaretDirection() { |
| if (!isBidiCaret()) return SWT.DEFAULT; |
| if (!updateCaretDirection && caretDirection != SWT.NULL) return caretDirection; |
| updateCaretDirection = false; |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| String line = content.getLine(caretLine); |
| int offset = caretOffset - lineOffset; |
| int lineLength = line.length(); |
| if (lineLength == 0) return isMirrored() ? SWT.RIGHT : SWT.LEFT; |
| if (caretAlignment == PREVIOUS_OFFSET_TRAILING && offset > 0) offset--; |
| if (offset == lineLength && offset > 0) offset--; |
| while (offset > 0 && Character.isDigit(line.charAt(offset))) offset--; |
| if (offset == 0 && Character.isDigit(line.charAt(offset))) { |
| return isMirrored() ? SWT.RIGHT : SWT.LEFT; |
| } |
| TextLayout layout = renderer.getTextLayout(caretLine); |
| int level = layout.getLevel(offset); |
| renderer.disposeTextLayout(layout); |
| return ((level & 1) != 0) ? SWT.RIGHT : SWT.LEFT; |
| } |
| /* |
| * Returns the index of the line the caret is on. |
| */ |
| int getCaretLine() { |
| return content.getLineAtOffset(caretOffset); |
| } |
| int getWrapWidth () { |
| if (wordWrap && !isSingleLine()) { |
| int width = clientAreaWidth - leftMargin - rightMargin; |
| return width > 0 ? width : 1; |
| } |
| return -1; |
| } |
| /** |
| * Returns the offset of the character after the word at the specified |
| * offset. |
| * <p> |
| * There are two classes of words formed by a sequence of characters: |
| * <ul> |
| * <li>from 0-9 and A-z (ASCII 48-57 and 65-122) |
| * <li>every other character except line breaks |
| * </ul> |
| * </p><p> |
| * Space characters ' ' (ASCII 20) are special as they are treated as |
| * part of the word leading up to the space character. Line breaks are |
| * treated as one word. |
| * </p> |
| */ |
| int getWordEnd(int offset) { |
| if (offset >= getCharCount()) { |
| return offset; |
| } |
| int lineIndex = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| int lineLength = content.getLine(lineIndex).length(); |
| if (offset == lineOffset + lineLength) { |
| offset = content.getOffsetAtLine(lineIndex + 1); |
| } else { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| offset -= lineOffset; |
| offset = layout.getNextOffset(offset, SWT.MOVEMENT_WORD); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| } |
| return offset; |
| } |
| /** |
| * Returns the offset of the character after the word at the specified |
| * offset. |
| * <p> |
| * There are two classes of words formed by a sequence of characters: |
| * <ul> |
| * <li>from 0-9 and A-z (ASCII 48-57 and 65-122) |
| * <li>every other character except line breaks |
| * </ul> |
| * </p><p> |
| * Spaces are ignored and do not represent a word. Line breaks are treated |
| * as one word. |
| * </p> |
| */ |
| int getWordEndNoSpaces(int offset) { |
| if (offset >= getCharCount()) { |
| return offset; |
| } |
| int line = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(line); |
| String lineText = content.getLine(line); |
| int lineLength = lineText.length(); |
| if (offset == lineOffset + lineLength) { |
| line++; |
| offset = content.getOffsetAtLine(line); |
| } else { |
| offset -= lineOffset; |
| char ch = lineText.charAt(offset); |
| boolean letterOrDigit = Compatibility.isLetterOrDigit(ch); |
| while (offset < lineLength - 1 && Compatibility.isLetterOrDigit(ch) == letterOrDigit && !Compatibility.isSpaceChar(ch)) { |
| offset++; |
| ch = lineText.charAt(offset); |
| } |
| if (offset == lineLength - 1 && Compatibility.isLetterOrDigit(ch) == letterOrDigit && !Compatibility.isSpaceChar(ch)) { |
| offset++; |
| } |
| offset += lineOffset; |
| } |
| return offset; |
| } |
| /** |
| * Returns the start offset of the word at the specified offset. |
| * There are two classes of words formed by a sequence of characters: |
| * <p> |
| * <ul> |
| * <li>from 0-9 and A-z (ASCII 48-57 and 65-122) |
| * <li>every other character except line breaks |
| * </ul> |
| * </p><p> |
| * Space characters ' ' (ASCII 20) are special as they are treated as |
| * part of the word leading up to the space character. Line breaks are treated |
| * as one word. |
| * </p> |
| */ |
| int getWordStart(int offset) { |
| if (offset <= 0) { |
| return offset; |
| } |
| int lineIndex = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| if (offset == lineOffset) { |
| lineIndex--; |
| String lineText = content.getLine(lineIndex); |
| offset = content.getOffsetAtLine(lineIndex) + lineText.length(); |
| } else { |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| offset -= lineOffset; |
| offset = layout.getPreviousOffset(offset, SWT.MOVEMENT_WORD); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| } |
| return offset; |
| } |
| /** |
| * Returns whether the widget wraps lines. |
| * |
| * @return true if widget wraps lines, false otherwise |
| * @since 2.0 |
| */ |
| public boolean getWordWrap() { |
| checkWidget(); |
| return wordWrap; |
| } |
| /** |
| * Returns the location of the given offset. |
| * <p> |
| * <b>NOTE:</b> Does not return correct values for true italic fonts (vs. slanted fonts). |
| * </p> |
| * |
| * @return location of the character at the given offset in the line. |
| */ |
| Point getPointAtOffset(int offset) { |
| int lineIndex = content.getLineAtOffset(offset); |
| String line = content.getLine(lineIndex); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| int offsetInLine = offset - lineOffset; |
| int lineLength = line.length(); |
| if (lineIndex < content.getLineCount() - 1) { |
| int endLineOffset = content.getOffsetAtLine(lineIndex + 1) - 1; |
| if (lineLength < offsetInLine && offsetInLine <= endLineOffset) { |
| offsetInLine = lineLength; |
| } |
| } |
| Point point; |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| if (lineLength != 0 && offsetInLine <= lineLength) { |
| if (offsetInLine == lineLength) { |
| point = layout.getLocation(offsetInLine - 1, true); |
| } else { |
| switch (caretAlignment) { |
| case OFFSET_LEADING: |
| point = layout.getLocation(offsetInLine, false); |
| break; |
| case PREVIOUS_OFFSET_TRAILING: |
| default: |
| if (offsetInLine == 0) { |
| point = layout.getLocation(offsetInLine, false); |
| } else { |
| point = layout.getLocation(offsetInLine - 1, true); |
| } |
| break; |
| } |
| } |
| } else { |
| point = new Point(layout.getIndent(), 0); |
| } |
| renderer.disposeTextLayout(layout); |
| point.x += leftMargin - horizontalScrollOffset; |
| point.y += getLinePixel(lineIndex); |
| return point; |
| } |
| /** |
| * Inserts a string. The old selection is replaced with the new text. |
| * |
| * @param string the string |
| * @see #replaceTextRange(int,int,String) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when string is null</li> |
| * </ul> |
| */ |
| public void insert(String string) { |
| checkWidget(); |
| if (string == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| Point sel = getSelectionRange(); |
| replaceTextRange(sel.x, sel.y, string); |
| } |
| /** |
| * Creates content change listeners and set the default content model. |
| */ |
| void installDefaultContent() { |
| textChangeListener = new TextChangeListener() { |
| public void textChanging(TextChangingEvent event) { |
| handleTextChanging(event); |
| } |
| public void textChanged(TextChangedEvent event) { |
| handleTextChanged(event); |
| } |
| public void textSet(TextChangedEvent event) { |
| handleTextSet(event); |
| } |
| }; |
| content = new DefaultContent(); |
| content.addTextChangeListener(textChangeListener); |
| } |
| /** |
| * Adds event listeners |
| */ |
| void installListeners() { |
| ScrollBar verticalBar = getVerticalBar(); |
| ScrollBar horizontalBar = getHorizontalBar(); |
| |
| listener = new Listener() { |
| public void handleEvent(Event event) { |
| switch (event.type) { |
| case SWT.Dispose: handleDispose(event); break; |
| case SWT.DragDetect: handleDragDetect(event); break; |
| case SWT.KeyDown: handleKeyDown(event); break; |
| case SWT.KeyUp: handleKeyUp(event); break; |
| case SWT.MouseDown: handleMouseDown(event); break; |
| case SWT.MouseUp: handleMouseUp(event); break; |
| case SWT.MouseDoubleClick: handleMouseDoubleClick(event); break; |
| case SWT.MouseMove: handleMouseMove(event); break; |
| case SWT.Paint: handlePaint(event); break; |
| case SWT.Resize: handleResize(event); break; |
| case SWT.Traverse: handleTraverse(event); break; |
| } |
| } |
| }; |
| addListener(SWT.Dispose, listener); |
| // do not hook SWT.DragDetect until required |
| addListener(SWT.KeyDown, listener); |
| addListener(SWT.KeyUp, listener); |
| addListener(SWT.MouseDown, listener); |
| addListener(SWT.MouseUp, listener); |
| addListener(SWT.MouseDoubleClick, listener); |
| addListener(SWT.MouseMove, listener); |
| addListener(SWT.Paint, listener); |
| addListener(SWT.Resize, listener); |
| addListener(SWT.Traverse, listener); |
| if (verticalBar != null) { |
| verticalBar.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| handleVerticalScroll(event); |
| } |
| }); |
| } |
| if (horizontalBar != null) { |
| horizontalBar.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| handleHorizontalScroll(event); |
| } |
| }); |
| } |
| } |
| void internalRedrawRange(int start, int length) { |
| if (length <= 0) return; |
| int end = start + length; |
| int startLine = content.getLineAtOffset(start); |
| int endLine = content.getLineAtOffset(end); |
| int partialBottomIndex = getPartialBottomIndex(); |
| int partialTopIndex = getPartialTopIndex(); |
| if (startLine > partialBottomIndex || endLine < partialTopIndex) { |
| return; |
| } |
| if (partialTopIndex > startLine) { |
| startLine = partialTopIndex; |
| start = 0; |
| } else { |
| start -= content.getOffsetAtLine(startLine); |
| } |
| if (partialBottomIndex < endLine) { |
| endLine = partialBottomIndex + 1; |
| end = 0; |
| } else { |
| end -= content.getOffsetAtLine(endLine); |
| } |
| |
| TextLayout layout = renderer.getTextLayout(startLine); |
| int lineX = leftMargin - horizontalScrollOffset, startLineY = getLinePixel(startLine); |
| int[] offsets = layout.getLineOffsets(); |
| int startIndex = layout.getLineIndex(Math.min(start, layout.getText().length())); |
| |
| /* Redraw end of line before start line if wrapped and start offset is first char */ |
| if (wordWrap && startIndex > 0 && offsets[startIndex] == start) { |
| Rectangle rect = layout.getLineBounds(startIndex - 1); |
| rect.x = rect.width; |
| rect.width = clientAreaWidth - rightMargin - rect.x; |
| rect.x += lineX; |
| rect.y += startLineY; |
| super.redraw(rect.x, rect.y, rect.width, rect.height, false); |
| } |
| |
| if (startLine == endLine) { |
| int endIndex = layout.getLineIndex(Math.min(end, layout.getText().length())); |
| if (startIndex == endIndex) { |
| /* Redraw rect between start and end offset if start and end offsets are in same wrapped line */ |
| Rectangle rect = layout.getBounds(start, end - 1); |
| rect.x += lineX; |
| rect.y += startLineY; |
| super.redraw(rect.x, rect.y, rect.width, rect.height, false); |
| renderer.disposeTextLayout(layout); |
| return; |
| } |
| } |
| |
| /* Redraw start line from the start offset to the end of client area */ |
| Rectangle startRect = layout.getBounds(start, offsets[startIndex + 1] - 1); |
| if (startRect.height == 0) { |
| Rectangle bounds = layout.getLineBounds(startIndex); |
| startRect.x = bounds.width; |
| startRect.y = bounds.y; |
| startRect.height = bounds.height; |
| } |
| startRect.x += lineX; |
| startRect.y += startLineY; |
| startRect.width = clientAreaWidth - rightMargin - startRect.x; |
| super.redraw(startRect.x, startRect.y, startRect.width, startRect.height, false); |
| |
| /* Redraw end line from the begining of the line to the end offset */ |
| if (startLine != endLine) { |
| renderer.disposeTextLayout(layout); |
| layout = renderer.getTextLayout(endLine); |
| offsets = layout.getLineOffsets(); |
| } |
| int endIndex = layout.getLineIndex(Math.min(end, layout.getText().length())); |
| Rectangle endRect = layout.getBounds(offsets[endIndex], end - 1); |
| if (endRect.height == 0) { |
| Rectangle bounds = layout.getLineBounds(endIndex); |
| endRect.y = bounds.y; |
| endRect.height = bounds.height; |
| } |
| endRect.x += lineX; |
| endRect.y += getLinePixel(endLine); |
| super.redraw(endRect.x, endRect.y, endRect.width, endRect.height, false); |
| renderer.disposeTextLayout(layout); |
| |
| /* Redraw all lines in between start and end line */ |
| int y = startRect.y + startRect.height; |
| if (endRect.y > y) { |
| super.redraw(leftMargin, y, clientAreaWidth - rightMargin - leftMargin, endRect.y - y, false); |
| } |
| } |
| /** |
| * Frees resources. |
| */ |
| void handleDispose(Event event) { |
| removeListener(SWT.Dispose, listener); |
| notifyListeners(SWT.Dispose, event); |
| event.type = SWT.None; |
| |
| clipboard.dispose(); |
| if (renderer != null) { |
| renderer.dispose(); |
| renderer = null; |
| } |
| if (content != null) { |
| content.removeTextChangeListener(textChangeListener); |
| content = null; |
| } |
| if (defaultCaret != null) { |
| defaultCaret.dispose(); |
| defaultCaret = null; |
| } |
| if (leftCaretBitmap != null) { |
| leftCaretBitmap.dispose(); |
| leftCaretBitmap = null; |
| } |
| if (rightCaretBitmap != null) { |
| rightCaretBitmap.dispose(); |
| rightCaretBitmap = null; |
| } |
| if (isBidiCaret()) { |
| BidiUtil.removeLanguageListener(handle); |
| } |
| selectionBackground = null; |
| selectionForeground = null; |
| textChangeListener = null; |
| selection = null; |
| doubleClickSelection = null; |
| keyActionMap = null; |
| background = null; |
| foreground = null; |
| clipboard = null; |
| } |
| void handleDragDetect(Event event) { |
| dragging = true; |
| } |
| /** |
| * Scrolls the widget horizontally. |
| */ |
| void handleHorizontalScroll(Event event) { |
| int scrollPixel = getHorizontalBar().getSelection() - horizontalScrollOffset; |
| scrollHorizontal(scrollPixel, false); |
| } |
| /** |
| * If an action has been registered for the key stroke execute the action. |
| * Otherwise, if a character has been entered treat it as new content. |
| * |
| * @param event keyboard event |
| */ |
| void handleKey(Event event) { |
| int action; |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| if (event.keyCode != 0) { |
| // special key pressed (e.g., F1) |
| action = getKeyBinding(event.keyCode | event.stateMask); |
| } else { |
| // character key pressed |
| action = getKeyBinding(event.character | event.stateMask); |
| if (action == SWT.NULL) { |
| // see if we have a control character |
| if ((event.stateMask & SWT.CTRL) != 0 && (event.character >= 0) && event.character <= 31) { |
| // get the character from the CTRL+char sequence, the control |
| // key subtracts 64 from the value of the key that it modifies |
| int c = event.character + 64; |
| action = getKeyBinding(c | event.stateMask); |
| } |
| } |
| } |
| if (action == SWT.NULL) { |
| boolean ignore = false; |
| |
| if (IS_CARBON) { |
| // Ignore accelerator key combinations (we do not want to |
| // insert a character in the text in this instance). Do not |
| // ignore COMMAND+ALT combinations since that key sequence |
| // produces characters on the mac. |
| ignore = (event.stateMask ^ SWT.COMMAND) == 0 || |
| (event.stateMask ^ (SWT.COMMAND | SWT.SHIFT)) == 0; |
| } else if (IS_MOTIF) { |
| // Ignore accelerator key combinations (we do not want to |
| // insert a character in the text in this instance). Do not |
| // ignore ALT combinations since this key sequence |
| // produces characters on motif. |
| ignore = (event.stateMask ^ SWT.CTRL) == 0 || |
| (event.stateMask ^ (SWT.CTRL | SWT.SHIFT)) == 0; |
| } else { |
| // Ignore accelerator key combinations (we do not want to |
| // insert a character in the text in this instance). Don't |
| // ignore CTRL+ALT combinations since that is the Alt Gr |
| // key on some keyboards. See bug 20953. |
| ignore = (event.stateMask ^ SWT.ALT) == 0 || |
| (event.stateMask ^ SWT.CTRL) == 0 || |
| (event.stateMask ^ (SWT.ALT | SWT.SHIFT)) == 0 || |
| (event.stateMask ^ (SWT.CTRL | SWT.SHIFT)) == 0; |
| } |
| // -ignore anything below SPACE except for line delimiter keys and tab. |
| // -ignore DEL |
| if (!ignore && event.character > 31 && event.character != SWT.DEL || |
| event.character == SWT.CR || event.character == SWT.LF || |
| event.character == TAB) { |
| doContent(event.character); |
| update(); |
| } |
| } else { |
| invokeAction(action); |
| } |
| } |
| /** |
| * If a VerifyKey listener exists, verify that the key that was entered |
| * should be processed. |
| * |
| * @param event keyboard event |
| */ |
| void handleKeyDown(Event event) { |
| if (clipboardSelection == null) { |
| clipboardSelection = new Point(selection.x, selection.y); |
| } |
| |
| Event verifyEvent = new Event(); |
| verifyEvent.character = event.character; |
| verifyEvent.keyCode = event.keyCode; |
| verifyEvent.stateMask = event.stateMask; |
| verifyEvent.doit = true; |
| notifyListeners(VerifyKey, verifyEvent); |
| if (verifyEvent.doit) { |
| handleKey(event); |
| } |
| } |
| /** |
| * Update the Selection Clipboard. |
| * |
| * @param event keyboard event |
| */ |
| void handleKeyUp(Event event) { |
| if (clipboardSelection != null) { |
| if (clipboardSelection.x != selection.x || clipboardSelection.y != selection.y) { |
| try { |
| if (selection.y - selection.x > 0) { |
| setClipboardContent(selection.x, selection.y - selection.x, DND.SELECTION_CLIPBOARD); |
| } |
| } catch (SWTError error) { |
| // Copy to clipboard failed. This happens when another application |
| // is accessing the clipboard while we copy. Ignore the error. |
| // Fixes 1GDQAVN |
| // Rethrow all other errors. Fixes bug 17578. |
| if (error.code != DND.ERROR_CANNOT_SET_CLIPBOARD) { |
| throw error; |
| } |
| } |
| } |
| } |
| clipboardSelection = null; |
| } |
| /** |
| * Updates the caret location and selection if mouse button 1 has been |
| * pressed. |
| */ |
| void handleMouseDoubleClick(Event event) { |
| if (event.button != 1 || !doubleClickEnabled) { |
| return; |
| } |
| mouseDoubleClick = true; |
| caretOffset = getWordStart(caretOffset); |
| resetSelection(); |
| caretOffset = getWordEndNoSpaces(caretOffset); |
| showCaret(); |
| doMouseSelection(); |
| doubleClickSelection = new Point(selection.x, selection.y); |
| } |
| /** |
| * Updates the caret location and selection if mouse button 1 has been |
| * pressed. |
| */ |
| void handleMouseDown(Event event) { |
| mouseDoubleClick = false; |
| |
| //force focus (object support) |
| forceFocus(); |
| |
| dragging = false; |
| removeListener(SWT.DragDetect, listener); |
| dragDetect = detectDrag(event.x, event.y, event.button); |
| if (dragDetect) { |
| addListener(SWT.DragDetect, listener); |
| return; |
| } |
| |
| mouseDown = true; |
| if (event.button == 2) { |
| String text = (String)getClipboardContent(DND.SELECTION_CLIPBOARD); |
| if (text != null && text.length() > 0) { |
| // position cursor |
| doMouseLocationChange(event.x, event.y, false); |
| // insert text |
| Event e = new Event(); |
| e.start = selection.x; |
| e.end = selection.y; |
| e.text = getModelDelimitedText(text); |
| sendKeyEvent(e); |
| } |
| } |
| if ((event.button != 1) || (IS_CARBON && (event.stateMask & SWT.MOD4) != 0)) { |
| return; |
| } |
| boolean select = (event.stateMask & SWT.MOD2) != 0; |
| doMouseLocationChange(event.x, event.y, select); |
| } |
| /** |
| * Updates the caret location and selection if mouse button 1 is pressed |
| * during the mouse move. |
| */ |
| void handleMouseMove(Event event) { |
| if (!mouseDown) return; |
| if ((event.stateMask & SWT.BUTTON1) == 0) { |
| return; |
| } |
| doMouseLocationChange(event.x, event.y, true); |
| update(); |
| doAutoScroll(event); |
| } |
| /** |
| * Autoscrolling ends when the mouse button is released. |
| */ |
| void handleMouseUp(Event event) { |
| mouseDown = false; |
| mouseDoubleClick = false; |
| endAutoScroll(); |
| if (dragDetect) { |
| removeListener(SWT.DragDetect, listener); |
| if (!dragging) { |
| boolean select = (event.stateMask & SWT.MOD2) != 0; |
| doMouseLocationChange(event.x, event.y, select); |
| } |
| } |
| dragDetect = dragging = false; |
| if (event.button == 1) { |
| try { |
| if (selection.y - selection.x > 0) { |
| setClipboardContent(selection.x, selection.y - selection.x, DND.SELECTION_CLIPBOARD); |
| } |
| } catch (SWTError error) { |
| // Copy to clipboard failed. This happens when another application |
| // is accessing the clipboard while we copy. Ignore the error. |
| // Fixes 1GDQAVN |
| // Rethrow all other errors. Fixes bug 17578. |
| if (error.code != DND.ERROR_CANNOT_SET_CLIPBOARD) { |
| throw error; |
| } |
| } |
| } |
| } |
| /** |
| * Renders the invalidated area specified in the paint event. |
| * |
| * @param event paint event |
| */ |
| void handlePaint(Event event) { |
| if (event.width == 0 || event.height == 0) return; |
| if (clientAreaWidth == 0 || clientAreaHeight == 0) return; |
| |
| int startLine = getLineIndex(event.y); |
| int y = getLinePixel(startLine); |
| int endY = event.y + event.height; |
| GC gc = event.gc; |
| Color background = getBackground(); |
| Color foreground = getForeground(); |
| if (endY > 0) { |
| int lineCount = isSingleLine() ? 1 : content.getLineCount(); |
| int x = leftMargin - horizontalScrollOffset; |
| for (int i = startLine; y < endY && i < lineCount; i++) { |
| y += renderer.drawLine(i, x, y, gc, background, foreground); |
| } |
| if (y < endY) { |
| gc.setBackground(background); |
| drawBackground(gc, 0, y, clientAreaWidth, endY - y); |
| } |
| } |
| // fill the margin background |
| gc.setBackground(background); |
| if (topMargin > 0) { |
| drawBackground(gc, 0, 0, clientAreaWidth, topMargin); |
| } |
| if (bottomMargin > 0) { |
| drawBackground(gc, 0, clientAreaHeight - bottomMargin, clientAreaWidth, bottomMargin); |
| } |
| if (leftMargin > 0) { |
| drawBackground(gc, 0, 0, leftMargin, clientAreaHeight); |
| } |
| if (rightMargin > 0) { |
| drawBackground(gc, clientAreaWidth - rightMargin, 0, rightMargin, clientAreaHeight); |
| } |
| } |
| /** |
| * Recalculates the scroll bars. Rewraps all lines when in word |
| * wrap mode. |
| * |
| * @param event resize event |
| */ |
| void handleResize(Event event) { |
| int oldHeight = clientAreaHeight; |
| int oldWidth = clientAreaWidth; |
| Rectangle clientArea = getClientArea(); |
| clientAreaHeight = clientArea.height; |
| clientAreaWidth = clientArea.width; |
| /* Redraw the old or new right/bottom margin if needed */ |
| if (oldWidth != clientAreaWidth) { |
| if (rightMargin > 0) { |
| int x = (oldWidth < clientAreaWidth ? oldWidth : clientAreaWidth) - rightMargin; |
| super.redraw(x, 0, rightMargin, oldHeight, false); |
| } |
| } |
| if (oldHeight != clientAreaHeight) { |
| if (bottomMargin > 0) { |
| int y = (oldHeight < clientAreaHeight ? oldHeight : clientAreaHeight) - bottomMargin; |
| super.redraw(0, y, oldWidth, bottomMargin, false); |
| } |
| } |
| if (wordWrap) { |
| if (oldWidth != clientAreaWidth) { |
| renderer.reset(0, content.getLineCount()); |
| verticalScrollOffset = -1; |
| renderer.calculateIdle(); |
| super.redraw(); |
| } |
| if (oldHeight != clientAreaHeight) { |
| if (oldHeight == 0) topIndexY = 0; |
| setScrollBars(true); |
| } |
| setCaretLocation(); |
| } else { |
| renderer.calculateClientArea(); |
| setScrollBars(true); |
| claimRightFreeSpace(); |
| } |
| claimBottomFreeSpace(); |
| //TODO FIX TOP INDEX DURING RESIZE |
| // if (oldHeight != clientAreaHeight || wordWrap) { |
| // calculateTopIndex(0); |
| // } |
| } |
| /** |
| * Updates the caret position and selection and the scroll bars to reflect |
| * the content change. |
| */ |
| void handleTextChanged(TextChangedEvent event) { |
| int firstLine = content.getLineAtOffset(lastTextChangeStart); |
| resetCache(firstLine, 0); |
| if (!isFixedLineHeight() && topIndex > firstLine) { |
| topIndex = firstLine; |
| topIndexY = 0; |
| super.redraw(); |
| } else { |
| int lastLine = firstLine + lastTextChangeNewLineCount; |
| int firstLineTop = getLinePixel(firstLine); |
| int newLastLineBottom = getLinePixel(lastLine + 1); |
| if (lastLineBottom != newLastLineBottom) { |
| scrollText(lastLineBottom, newLastLineBottom); |
| if (wordWrap) setCaretLocation(); |
| } |
| super.redraw(0, firstLineTop, clientAreaWidth, newLastLineBottom - firstLineTop, false); |
| redrawLinesBullet(renderer.redrawLines); |
| } |
| renderer.redrawLines = null; |
| // update selection/caret location after styles have been changed. |
| // otherwise any text measuring could be incorrect |
| // |
| // also, this needs to be done after all scrolling. Otherwise, |
| // selection redraw would be flushed during scroll which is wrong. |
| // in some cases new text would be drawn in scroll source area even |
| // though the intent is to scroll it. |
| updateSelection(lastTextChangeStart, lastTextChangeReplaceCharCount, lastTextChangeNewCharCount); |
| if (lastTextChangeReplaceLineCount > 0 || wordWrap) { |
| claimBottomFreeSpace(); |
| } |
| if (lastTextChangeReplaceCharCount > 0) { |
| claimRightFreeSpace(); |
| } |
| } |
| /** |
| * Updates the screen to reflect a pending content change. |
| * |
| * @param event.start the start offset of the change |
| * @param event.newText text that is going to be inserted or empty String |
| * if no text will be inserted |
| * @param event.replaceCharCount length of text that is going to be replaced |
| * @param event.newCharCount length of text that is going to be inserted |
| * @param event.replaceLineCount number of lines that are going to be replaced |
| * @param event.newLineCount number of new lines that are going to be inserted |
| */ |
| void handleTextChanging(TextChangingEvent event) { |
| if (event.replaceCharCount < 0) { |
| event.start += event.replaceCharCount; |
| event.replaceCharCount *= -1; |
| } |
| lastTextChangeStart = event.start; |
| lastTextChangeNewLineCount = event.newLineCount; |
| lastTextChangeNewCharCount = event.newCharCount; |
| lastTextChangeReplaceLineCount = event.replaceLineCount; |
| lastTextChangeReplaceCharCount = event.replaceCharCount; |
| int lineIndex = content.getLineAtOffset(event.start); |
| int srcY = getLinePixel(lineIndex + event.replaceLineCount + 1); |
| int destY = getLinePixel(lineIndex + 1) + event.newLineCount * renderer.getLineHeight(); |
| lastLineBottom = destY; |
| scrollText(srcY, destY); |
| |
| renderer.textChanging(event); |
| |
| // Update the caret offset if it is greater than the length of the content. |
| // This is necessary since style range API may be called between the |
| // handleTextChanging and handleTextChanged events and this API sets the |
| // caretOffset. |
| int newEndOfText = content.getCharCount() - event.replaceCharCount + event.newCharCount; |
| if (caretOffset > newEndOfText) caretOffset = newEndOfText; |
| } |
| /** |
| * Called when the widget content is set programatically, overwriting |
| * the old content. Resets the caret position, selection and scroll offsets. |
| * Recalculates the content width and scroll bars. Redraws the widget. |
| * |
| * @param event text change event. |
| */ |
| void handleTextSet(TextChangedEvent event) { |
| reset(); |
| } |
| /** |
| * Called when a traversal key is pressed. |
| * Allow tab next traversal to occur when the widget is in single |
| * line mode or in multi line and non-editable mode . |
| * When in editable multi line mode we want to prevent the tab |
| * traversal and receive the tab key event instead. |
| * |
| * @param event the event |
| */ |
| void handleTraverse(Event event) { |
| switch (event.detail) { |
| case SWT.TRAVERSE_ESCAPE: |
| case SWT.TRAVERSE_PAGE_NEXT: |
| case SWT.TRAVERSE_PAGE_PREVIOUS: |
| event.doit = true; |
| break; |
| case SWT.TRAVERSE_RETURN: |
| case SWT.TRAVERSE_TAB_NEXT: |
| case SWT.TRAVERSE_TAB_PREVIOUS: |
| if ((getStyle() & SWT.SINGLE) != 0) { |
| event.doit = true; |
| } else { |
| if (!editable || (event.stateMask & SWT.MODIFIER_MASK) != 0) { |
| event.doit = true; |
| } |
| } |
| break; |
| } |
| } |
| /** |
| * Scrolls the widget vertically. |
| */ |
| void handleVerticalScroll(Event event) { |
| int scrollPixel = getVerticalBar().getSelection() - getVerticalScrollOffset(); |
| scrollVertical(scrollPixel, false); |
| } |
| /** |
| * Add accessibility support for the widget. |
| */ |
| void initializeAccessible() { |
| final Accessible accessible = getAccessible(); |
| accessible.addAccessibleListener(new AccessibleAdapter() { |
| public void getName (AccessibleEvent e) { |
| String name = null; |
| Label label = getAssociatedLabel (); |
| if (label != null) { |
| name = stripMnemonic (label.getText()); |
| } |
| e.result = name; |
| } |
| public void getHelp(AccessibleEvent e) { |
| e.result = getToolTipText(); |
| } |
| public void getKeyboardShortcut(AccessibleEvent e) { |
| String shortcut = null; |
| Label label = getAssociatedLabel (); |
| if (label != null) { |
| String text = label.getText (); |
| if (text != null) { |
| char mnemonic = _findMnemonic (text); |
| if (mnemonic != '\0') { |
| shortcut = "Alt+"+mnemonic; //$NON-NLS-1$ |
| } |
| } |
| } |
| e.result = shortcut; |
| } |
| }); |
| accessible.addAccessibleTextListener(new AccessibleTextAdapter() { |
| public void getCaretOffset(AccessibleTextEvent e) { |
| e.offset = StyledText.this.getCaretOffset(); |
| } |
| public void getSelectionRange(AccessibleTextEvent e) { |
| Point selection = StyledText.this.getSelectionRange(); |
| e.offset = selection.x; |
| e.length = selection.y; |
| } |
| }); |
| accessible.addAccessibleControlListener(new AccessibleControlAdapter() { |
| public void getRole(AccessibleControlEvent e) { |
| e.detail = ACC.ROLE_TEXT; |
| } |
| public void getState(AccessibleControlEvent e) { |
| int state = 0; |
| if (isEnabled()) state |= ACC.STATE_FOCUSABLE; |
| if (isFocusControl()) state |= ACC.STATE_FOCUSED; |
| if (!isVisible()) state |= ACC.STATE_INVISIBLE; |
| if (!getEditable()) state |= ACC.STATE_READONLY; |
| e.detail = state; |
| } |
| public void getValue(AccessibleControlEvent e) { |
| e.result = StyledText.this.getText(); |
| } |
| }); |
| addListener(SWT.FocusIn, new Listener() { |
| public void handleEvent(Event event) { |
| accessible.setFocus(ACC.CHILDID_SELF); |
| } |
| }); |
| } |
| /* |
| * Return the Label immediately preceding the receiver in the z-order, |
| * or null if none. |
| */ |
| Label getAssociatedLabel () { |
| Control[] siblings = getParent ().getChildren (); |
| for (int i = 0; i < siblings.length; i++) { |
| if (siblings [i] == StyledText.this) { |
| if (i > 0 && siblings [i-1] instanceof Label) { |
| return (Label) siblings [i-1]; |
| } |
| } |
| } |
| return null; |
| } |
| String stripMnemonic (String string) { |
| int index = 0; |
| int length = string.length (); |
| do { |
| while ((index < length) && (string.charAt (index) != '&')) index++; |
| if (++index >= length) return string; |
| if (string.charAt (index) != '&') { |
| return string.substring(0, index-1) + string.substring(index, length); |
| } |
| index++; |
| } while (index < length); |
| return string; |
| } |
| /* |
| * Return the lowercase of the first non-'&' character following |
| * an '&' character in the given string. If there are no '&' |
| * characters in the given string, return '\0'. |
| */ |
| char _findMnemonic (String string) { |
| if (string == null) return '\0'; |
| int index = 0; |
| int length = string.length (); |
| do { |
| while (index < length && string.charAt (index) != '&') index++; |
| if (++index >= length) return '\0'; |
| if (string.charAt (index) != '&') return Character.toLowerCase (string.charAt (index)); |
| index++; |
| } while (index < length); |
| return '\0'; |
| } |
| /** |
| * Executes the action. |
| * |
| * @param action one of the actions defined in ST.java |
| */ |
| public void invokeAction(int action) { |
| checkWidget(); |
| updateCaretDirection = true; |
| switch (action) { |
| // Navigation |
| case ST.LINE_UP: |
| doLineUp(false); |
| clearSelection(true); |
| break; |
| case ST.LINE_DOWN: |
| doLineDown(false); |
| clearSelection(true); |
| break; |
| case ST.LINE_START: |
| doLineStart(); |
| clearSelection(true); |
| break; |
| case ST.LINE_END: |
| doLineEnd(); |
| clearSelection(true); |
| break; |
| case ST.COLUMN_PREVIOUS: |
| doCursorPrevious(); |
| clearSelection(true); |
| break; |
| case ST.COLUMN_NEXT: |
| doCursorNext(); |
| clearSelection(true); |
| break; |
| case ST.PAGE_UP: |
| doPageUp(false, -1); |
| clearSelection(true); |
| break; |
| case ST.PAGE_DOWN: |
| doPageDown(false, -1); |
| clearSelection(true); |
| break; |
| case ST.WORD_PREVIOUS: |
| doWordPrevious(); |
| clearSelection(true); |
| break; |
| case ST.WORD_NEXT: |
| doWordNext(); |
| clearSelection(true); |
| break; |
| case ST.TEXT_START: |
| doContentStart(); |
| clearSelection(true); |
| break; |
| case ST.TEXT_END: |
| doContentEnd(); |
| clearSelection(true); |
| break; |
| case ST.WINDOW_START: |
| doPageStart(); |
| clearSelection(true); |
| break; |
| case ST.WINDOW_END: |
| doPageEnd(); |
| clearSelection(true); |
| break; |
| // Selection |
| case ST.SELECT_LINE_UP: |
| doSelectionLineUp(); |
| break; |
| case ST.SELECT_ALL: |
| selectAll(); |
| break; |
| case ST.SELECT_LINE_DOWN: |
| doSelectionLineDown(); |
| break; |
| case ST.SELECT_LINE_START: |
| doLineStart(); |
| doSelection(ST.COLUMN_PREVIOUS); |
| break; |
| case ST.SELECT_LINE_END: |
| doLineEnd(); |
| doSelection(ST.COLUMN_NEXT); |
| break; |
| case ST.SELECT_COLUMN_PREVIOUS: |
| doSelectionCursorPrevious(); |
| doSelection(ST.COLUMN_PREVIOUS); |
| break; |
| case ST.SELECT_COLUMN_NEXT: |
| doSelectionCursorNext(); |
| doSelection(ST.COLUMN_NEXT); |
| break; |
| case ST.SELECT_PAGE_UP: |
| doSelectionPageUp(-1); |
| break; |
| case ST.SELECT_PAGE_DOWN: |
| doSelectionPageDown(-1); |
| break; |
| case ST.SELECT_WORD_PREVIOUS: |
| doSelectionWordPrevious(); |
| doSelection(ST.COLUMN_PREVIOUS); |
| break; |
| case ST.SELECT_WORD_NEXT: |
| doSelectionWordNext(); |
| doSelection(ST.COLUMN_NEXT); |
| break; |
| case ST.SELECT_TEXT_START: |
| doContentStart(); |
| doSelection(ST.COLUMN_PREVIOUS); |
| break; |
| case ST.SELECT_TEXT_END: |
| doContentEnd(); |
| doSelection(ST.COLUMN_NEXT); |
| break; |
| case ST.SELECT_WINDOW_START: |
| doPageStart(); |
| doSelection(ST.COLUMN_PREVIOUS); |
| break; |
| case ST.SELECT_WINDOW_END: |
| doPageEnd(); |
| doSelection(ST.COLUMN_NEXT); |
| break; |
| // Modification |
| case ST.CUT: |
| cut(); |
| break; |
| case ST.COPY: |
| copy(); |
| break; |
| case ST.PASTE: |
| paste(); |
| break; |
| case ST.DELETE_PREVIOUS: |
| doBackspace(); |
| break; |
| case ST.DELETE_NEXT: |
| doDelete(); |
| break; |
| case ST.DELETE_WORD_PREVIOUS: |
| doDeleteWordPrevious(); |
| break; |
| case ST.DELETE_WORD_NEXT: |
| doDeleteWordNext(); |
| break; |
| // Miscellaneous |
| case ST.TOGGLE_OVERWRITE: |
| overwrite = !overwrite; // toggle insert/overwrite mode |
| break; |
| } |
| } |
| /** |
| * Temporary until SWT provides this |
| */ |
| boolean isBidi() { |
| return IS_GTK || BidiUtil.isBidiPlatform() || isMirrored; |
| } |
| boolean isBidiCaret() { |
| return BidiUtil.isBidiPlatform(); |
| } |
| boolean isFixedLineHeight() { |
| return fixedLineHeight; |
| } |
| /** |
| * Returns whether the given offset is inside a multi byte line delimiter. |
| * Example: |
| * "Line1\r\n" isLineDelimiter(5) == false but isLineDelimiter(6) == true |
| * |
| * @return true if the given offset is inside a multi byte line delimiter. |
| * false if the given offset is before or after a line delimiter. |
| */ |
| boolean isLineDelimiter(int offset) { |
| int line = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(line); |
| int offsetInLine = offset - lineOffset; |
| // offsetInLine will be greater than line length if the line |
| // delimiter is longer than one character and the offset is set |
| // in between parts of the line delimiter. |
| return offsetInLine > content.getLine(line).length(); |
| } |
| /** |
| * Returns whether the widget is mirrored (right oriented/right to left |
| * writing order). |
| * |
| * @return isMirrored true=the widget is right oriented, false=the widget |
| * is left oriented |
| */ |
| boolean isMirrored() { |
| return isMirrored; |
| } |
| /** |
| * Returns whether the widget can have only one line. |
| * |
| * @return true if widget can have only one line, false if widget can have |
| * multiple lines |
| */ |
| boolean isSingleLine() { |
| return (getStyle() & SWT.SINGLE) != 0; |
| } |
| /** |
| * Sends the specified verify event, replace/insert text as defined by |
| * the event and send a modify event. |
| * |
| * @param event the text change event. |
| * <ul> |
| * <li>event.start - the replace start offset</li> |
| * <li>event.end - the replace end offset</li> |
| * <li>event.text - the new text</li> |
| * </ul> |
| * @param updateCaret whether or not he caret should be set behind |
| * the new text |
| */ |
| void modifyContent(Event event, boolean updateCaret) { |
| event.doit = true; |
| notifyListeners(SWT.Verify, event); |
| if (event.doit) { |
| StyledTextEvent styledTextEvent = null; |
| int replacedLength = event.end - event.start; |
| if (isListening(ExtendedModify)) { |
| styledTextEvent = new StyledTextEvent(content); |
| styledTextEvent.start = event.start; |
| styledTextEvent.end = event.start + event.text.length(); |
| styledTextEvent.text = content.getTextRange(event.start, replacedLength); |
| } |
| if (updateCaret) { |
| //Fix advancing flag for delete/backspace key on direction boundary |
| if (event.text.length() == 0) { |
| int lineIndex = content.getLineAtOffset(event.start); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineIndex); |
| int levelStart = layout.getLevel(event.start - lineOffset); |
| int lineIndexEnd = content.getLineAtOffset(event.end); |
| if (lineIndex != lineIndexEnd) { |
| renderer.disposeTextLayout(layout); |
| lineOffset = content.getOffsetAtLine(lineIndexEnd); |
| layout = renderer.getTextLayout(lineIndexEnd); |
| } |
| int levelEnd = layout.getLevel(event.end - lineOffset); |
| renderer.disposeTextLayout(layout); |
| if (levelStart != levelEnd) { |
| caretAlignment = PREVIOUS_OFFSET_TRAILING; |
| } else { |
| caretAlignment = OFFSET_LEADING; |
| } |
| } |
| } |
| content.replaceTextRange(event.start, replacedLength, event.text); |
| // set the caret position prior to sending the modify event. |
| // fixes 1GBB8NJ |
| if (updateCaret) { |
| // always update the caret location. fixes 1G8FODP |
| setSelection(event.start + event.text.length(), 0, true); |
| showCaret(); |
| } |
| sendModifyEvent(event); |
| if (isListening(ExtendedModify)) { |
| notifyListeners(ExtendedModify, styledTextEvent); |
| } |
| } |
| } |
| void paintObject(GC gc, int x, int y, int ascent, int descent, StyleRange style, Bullet bullet, int bulletIndex) { |
| if (isListening(PaintObject)) { |
| StyledTextEvent event = new StyledTextEvent (content) ; |
| event.gc = gc; |
| event.x = x; |
| event.y = y; |
| event.ascent = ascent; |
| event.descent = descent; |
| event.style = style; |
| event.bullet = bullet; |
| event.bulletIndex = bulletIndex; |
| notifyListeners(PaintObject, event); |
| } |
| } |
| /** |
| * Replaces the selection with the text on the <code>DND.CLIPBOARD</code> |
| * clipboard or, if there is no selection, inserts the text at the current |
| * caret offset. If the widget has the SWT.SINGLE style and the |
| * clipboard text contains more than one line, only the first line without |
| * line delimiters is inserted in the widget. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void paste(){ |
| checkWidget(); |
| String text = (String) getClipboardContent(DND.CLIPBOARD); |
| if (text != null && text.length() > 0) { |
| Event event = new Event(); |
| event.start = selection.x; |
| event.end = selection.y; |
| event.text = getModelDelimitedText(text); |
| sendKeyEvent(event); |
| } |
| } |
| /** |
| * Prints the widget's text to the default printer. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void print() { |
| checkWidget(); |
| Printer printer = new Printer(); |
| StyledTextPrintOptions options = new StyledTextPrintOptions(); |
| options.printTextForeground = true; |
| options.printTextBackground = true; |
| options.printTextFontStyle = true; |
| options.printLineBackground = true; |
| new Printing(this, printer, options).run(); |
| printer.dispose(); |
| } |
| /** |
| * Returns a runnable that will print the widget's text |
| * to the specified printer. |
| * <p> |
| * The runnable may be run in a non-UI thread. |
| * </p> |
| * |
| * @param printer the printer to print to |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when printer is null</li> |
| * </ul> |
| */ |
| public Runnable print(Printer printer) { |
| checkWidget(); |
| if (printer == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| StyledTextPrintOptions options = new StyledTextPrintOptions(); |
| options.printTextForeground = true; |
| options.printTextBackground = true; |
| options.printTextFontStyle = true; |
| options.printLineBackground = true; |
| return print(printer, options); |
| } |
| /** |
| * Returns a runnable that will print the widget's text |
| * to the specified printer. |
| * <p> |
| * The runnable may be run in a non-UI thread. |
| * </p> |
| * |
| * @param printer the printer to print to |
| * @param options print options to use during printing |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when printer or options is null</li> |
| * </ul> |
| * @since 2.1 |
| */ |
| public Runnable print(Printer printer, StyledTextPrintOptions options) { |
| checkWidget(); |
| if (printer == null || options == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| return new Printing(this, printer, options); |
| } |
| /** |
| * Causes the entire bounds of the receiver to be marked |
| * as needing to be redrawn. The next time a paint request |
| * is processed, the control will be completely painted. |
| * <p> |
| * Recalculates the content width for all lines in the bounds. |
| * When a <code>LineStyleListener</code> is used a redraw call |
| * is the only notification to the widget that styles have changed |
| * and that the content width may have changed. |
| * </p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see Control#update |
| */ |
| public void redraw() { |
| super.redraw(); |
| int itemCount = getPartialBottomIndex() - topIndex + 1; |
| renderer.reset(topIndex, itemCount); |
| renderer.calculate(topIndex, itemCount); |
| setScrollBars(false); |
| } |
| /** |
| * Causes the rectangular area of the receiver specified by |
| * the arguments to be marked as needing to be redrawn. |
| * The next time a paint request is processed, that area of |
| * the receiver will be painted. If the <code>all</code> flag |
| * is <code>true</code>, any children of the receiver which |
| * intersect with the specified area will also paint their |
| * intersecting areas. If the <code>all</code> flag is |
| * <code>false</code>, the children will not be painted. |
| * <p> |
| * Marks the content width of all lines in the specified rectangle |
| * as unknown. Recalculates the content width of all visible lines. |
| * When a <code>LineStyleListener</code> is used a redraw call |
| * is the only notification to the widget that styles have changed |
| * and that the content width may have changed. |
| * </p> |
| * |
| * @param x the x coordinate of the area to draw |
| * @param y the y coordinate of the area to draw |
| * @param width the width of the area to draw |
| * @param height the height of the area to draw |
| * @param all <code>true</code> if children should redraw, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see Control#update |
| */ |
| public void redraw(int x, int y, int width, int height, boolean all) { |
| super.redraw(x, y, width, height, all); |
| if (height > 0) { |
| int firstLine = getLineIndex(y); |
| int lastLine = getLineIndex(y + height); |
| resetCache(firstLine, lastLine - firstLine + 1); |
| } |
| } |
| void redrawLines(int startLine, int lineCount) { |
| // do nothing if redraw range is completely invisible |
| int partialBottomIndex = getPartialBottomIndex(); |
| if (startLine > partialBottomIndex || startLine + lineCount - 1 < topIndex) { |
| return; |
| } |
| // only redraw visible lines |
| if (startLine < topIndex) { |
| lineCount -= topIndex - startLine; |
| startLine = topIndex; |
| } |
| if (startLine + lineCount - 1 > partialBottomIndex) { |
| lineCount = partialBottomIndex - startLine + 1; |
| } |
| startLine -= topIndex; |
| int redrawTop = getLinePixel(startLine); |
| int redrawBottom = getLinePixel(startLine + lineCount); |
| int redrawWidth = clientAreaWidth - leftMargin - rightMargin; |
| super.redraw(leftMargin, redrawTop, redrawWidth, redrawBottom - redrawTop, true); |
| } |
| void redrawLinesBullet (int[] redrawLines) { |
| if (redrawLines == null) return; |
| int topIndex = getPartialTopIndex(); |
| int bottomIndex = getPartialBottomIndex(); |
| for (int i = 0; i < redrawLines.length; i++) { |
| int lineIndex = redrawLines[i]; |
| if (!(topIndex <= lineIndex && lineIndex <= bottomIndex)) continue; |
| int width = -1; |
| Bullet bullet = renderer.getLineBullet(lineIndex, null); |
| if (bullet != null) { |
| StyleRange style = bullet.style; |
| GlyphMetrics metrics = style.metrics; |
| width = metrics.width; |
| } |
| if (width == -1) width = getClientArea().width; |
| int height = renderer.getLineHeight(lineIndex); |
| int y = getLinePixel(lineIndex); |
| super.redraw(0, y, width, height, false); |
| } |
| } |
| /** |
| * Redraws the specified text range. |
| * |
| * @param start offset of the first character to redraw |
| * @param length number of characters to redraw |
| * @param clearBackground true if the background should be cleared as |
| * part of the redraw operation. If true, the entire redraw range will |
| * be cleared before anything is redrawn. If the redraw range includes |
| * the last character of a line (i.e., the entire line is redrawn) the |
| * line is cleared all the way to the right border of the widget. |
| * The redraw operation will be faster and smoother if clearBackground |
| * is set to false. Whether or not the flag can be set to false depends |
| * on the type of change that has taken place. If font styles or |
| * background colors for the redraw range have changed, clearBackground |
| * should be set to true. If only foreground colors have changed for |
| * the redraw range, clearBackground can be set to false. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when start and/or end are outside the widget content</li> |
| * </ul> |
| */ |
| public void redrawRange(int start, int length, boolean clearBackground) { |
| checkWidget(); |
| int end = start + length; |
| int contentLength = content.getCharCount(); |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| int firstLine = content.getLineAtOffset(start); |
| int lastLine = content.getLineAtOffset(end); |
| resetCache(firstLine, lastLine - firstLine + 1); |
| internalRedrawRange(start, length); |
| } |
| /** |
| * Removes the specified bidirectional segment listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| * @since 2.0 |
| */ |
| public void removeBidiSegmentListener(BidiSegmentListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(LineGetSegments, listener); |
| } |
| /** |
| * Removes the specified extended modify listener. |
| * |
| * @param extendedModifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeExtendedModifyListener(ExtendedModifyListener extendedModifyListener) { |
| checkWidget(); |
| if (extendedModifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(ExtendedModify, extendedModifyListener); |
| } |
| /** |
| * Removes the specified line background listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeLineBackgroundListener(LineBackgroundListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(LineGetBackground, listener); |
| } |
| /** |
| * Removes the specified line style listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeLineStyleListener(LineStyleListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(LineGetStyle, listener); |
| } |
| /** |
| * Removes the specified modify listener. |
| * |
| * @param modifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeModifyListener(ModifyListener modifyListener) { |
| checkWidget(); |
| if (modifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(SWT.Modify, modifyListener); |
| } |
| /** |
| * Removes the specified listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| * @since 3.2 |
| */ |
| public void removePaintObjectListener(PaintObjectListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(PaintObject, listener); |
| } |
| /** |
| * Removes the specified selection listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(SWT.Selection, listener); |
| } |
| /** |
| * Removes the specified verify listener. |
| * |
| * @param verifyListener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeVerifyListener(VerifyListener verifyListener) { |
| checkWidget(); |
| if (verifyListener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(SWT.Verify, verifyListener); |
| } |
| /** |
| * Removes the specified key verify listener. |
| * |
| * @param listener the listener |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void removeVerifyKeyListener(VerifyKeyListener listener) { |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(VerifyKey, listener); |
| } |
| /** |
| * Replaces the styles in the given range with new styles. This method |
| * effectively deletes the styles in the given range and then adds the |
| * the new styles. |
| * <p> |
| * Note: Because a StyleRange includes the start and length, the |
| * same instance cannot occur multiple times in the array of styles. |
| * If the same style attributes, such as font and color, occur in |
| * multiple StyleRanges, <code>setStyleRanges(int, int, int[], StyleRange[])</code> |
| * can be used to share styles and reduce memory usage. |
| * </p><p> |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param start offset of first character where styles will be deleted |
| * @param length length of the range to delete styles in |
| * @param ranges StyleRange objects containing the new style information. |
| * The ranges should not overlap and should be within the specified start |
| * and length. The style rendering is undefined if the ranges do overlap |
| * or are ill-defined. Must not be null. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when either start or end is outside the valid range (0 <= offset <= getCharCount())</li> |
| * <li>ERROR_NULL_ARGUMENT when ranges is null</li> |
| * </ul> |
| * |
| * @since 2.0 |
| * |
| * @see #setStyleRanges(int, int, int[], StyleRange[]) |
| */ |
| public void replaceStyleRanges(int start, int length, StyleRange[] ranges) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (ranges == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| setStyleRanges(start, length, null, ranges, false); |
| } |
| /** |
| * Replaces the given text range with new text. |
| * If the widget has the SWT.SINGLE style and "text" contains more than |
| * one line, only the first line is rendered but the text is stored |
| * unchanged. A subsequent call to getText will return the same text |
| * that was set. Note that only a single line of text should be set when |
| * the SWT.SINGLE style is used. |
| * <p> |
| * <b>NOTE:</b> During the replace operation the current selection is |
| * changed as follows: |
| * <ul> |
| * <li>selection before replaced text: selection unchanged |
| * <li>selection after replaced text: adjust the selection so that same text |
| * remains selected |
| * <li>selection intersects replaced text: selection is cleared and caret |
| * is placed after inserted text |
| * </ul> |
| * </p> |
| * |
| * @param start offset of first character to replace |
| * @param length number of characters to replace. Use 0 to insert text |
| * @param text new text. May be empty to delete text. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when either start or end is outside the valid range (0 <= offset <= getCharCount())</li> |
| * <li>ERROR_INVALID_ARGUMENT when either start or end is inside a multi byte line delimiter. |
| * Splitting a line delimiter for example by inserting text in between the CR and LF and deleting part of a line delimiter is not supported</li> |
| * <li>ERROR_NULL_ARGUMENT when string is null</li> |
| * </ul> |
| */ |
| public void replaceTextRange(int start, int length, String text) { |
| checkWidget(); |
| if (text == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| int contentLength = getCharCount(); |
| int end = start + length; |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| Event event = new Event(); |
| event.start = start; |
| event.end = end; |
| event.text = text; |
| modifyContent(event, false); |
| } |
| /** |
| * Resets the caret position, selection and scroll offsets. Recalculate |
| * the content width and scroll bars. Redraw the widget. |
| */ |
| void reset() { |
| ScrollBar verticalBar = getVerticalBar(); |
| ScrollBar horizontalBar = getHorizontalBar(); |
| caretOffset = 0; |
| topIndex = 0; |
| topIndexY = 0; |
| verticalScrollOffset = 0; |
| horizontalScrollOffset = 0; |
| resetSelection(); |
| renderer.setContent(content); |
| if (verticalBar != null) { |
| verticalBar.setSelection(0); |
| } |
| if (horizontalBar != null) { |
| horizontalBar.setSelection(0); |
| } |
| resetCache(0, 0); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| void resetCache(int firstLine, int count) { |
| renderer.reset(firstLine, count); |
| renderer.calculateClientArea(); |
| setScrollBars(true); |
| if (!isFixedLineHeight()) { |
| if (topIndex > firstLine) { |
| verticalScrollOffset = -1; |
| } |
| renderer.calculateIdle(); |
| } |
| } |
| /** |
| * Resets the selection. |
| */ |
| void resetSelection() { |
| selection.x = selection.y = caretOffset; |
| selectionAnchor = -1; |
| } |
| |
| public void scroll(int destX, int destY, int x, int y, int width, int height, boolean all) { |
| super.scroll(destX, destY, x, y, width, height, false); |
| if (all) { |
| int deltaX = destX - x, deltaY = destY - y; |
| Control[] children = getChildren(); |
| for (int i=0; i<children.length; i++) { |
| Control child = children[i]; |
| Rectangle rect = child.getBounds(); |
| child.setLocation(rect.x + deltaX, rect.y + deltaY); |
| } |
| } |
| } |
| |
| /** |
| * Scrolls the widget horizontally. |
| * |
| * @param pixels number of pixels to scroll, > 0 = scroll left, |
| * < 0 scroll right |
| * @param adjustScrollBar |
| * true= the scroll thumb will be moved to reflect the new scroll offset. |
| * false = the scroll thumb will not be moved |
| * @return |
| * true=the widget was scrolled |
| * false=the widget was not scrolled, the given offset is not valid. |
| */ |
| boolean scrollHorizontal(int pixels, boolean adjustScrollBar) { |
| if (pixels == 0) { |
| return false; |
| } |
| ScrollBar horizontalBar = getHorizontalBar(); |
| if (horizontalBar != null && adjustScrollBar) { |
| horizontalBar.setSelection(horizontalScrollOffset + pixels); |
| } |
| int scrollHeight = clientAreaHeight - topMargin - bottomMargin; |
| if (pixels > 0) { |
| int sourceX = leftMargin + pixels; |
| int scrollWidth = clientAreaWidth - sourceX - rightMargin; |
| if (scrollWidth > 0) { |
| scroll(leftMargin, topMargin, sourceX, topMargin, scrollWidth, scrollHeight, true); |
| } |
| if (sourceX > scrollWidth) { |
| super.redraw(leftMargin + scrollWidth, topMargin, pixels - scrollWidth, scrollHeight, true); |
| } |
| } else { |
| int destinationX = leftMargin - pixels; |
| int scrollWidth = clientAreaWidth - destinationX - rightMargin; |
| if (scrollWidth > 0) { |
| scroll(destinationX, topMargin, leftMargin, topMargin, scrollWidth, scrollHeight, true); |
| } |
| if (destinationX > scrollWidth) { |
| super.redraw(leftMargin + scrollWidth, topMargin, -pixels - scrollWidth, scrollHeight, true); |
| } |
| } |
| horizontalScrollOffset += pixels; |
| int oldColumnX = columnX; |
| setCaretLocation(); |
| columnX = oldColumnX; |
| return true; |
| } |
| /** |
| * Scrolls the widget vertically. |
| * |
| * @param pixel the new vertical scroll offset |
| * @param adjustScrollBar |
| * true= the scroll thumb will be moved to reflect the new scroll offset. |
| * false = the scroll thumb will not be moved |
| * @return |
| * true=the widget was scrolled |
| * false=the widget was not scrolled |
| */ |
| boolean scrollVertical(int pixels, boolean adjustScrollBar) { |
| if (pixels == 0) { |
| return false; |
| } |
| if (verticalScrollOffset != -1) { |
| ScrollBar verticalBar = getVerticalBar(); |
| if (verticalBar != null && adjustScrollBar) { |
| verticalBar.setSelection(verticalScrollOffset + pixels); |
| } |
| int scrollWidth = clientAreaWidth - leftMargin - rightMargin; |
| if (pixels > 0) { |
| int sourceY = topMargin + pixels; |
| int scrollHeight = clientAreaHeight - sourceY - bottomMargin; |
| if (scrollHeight > 0) { |
| scroll(leftMargin, topMargin, leftMargin, sourceY, scrollWidth, scrollHeight, true); |
| } |
| if (sourceY > scrollHeight) { |
| int redrawY = Math.max(0, topMargin + scrollHeight); |
| int redrawHeight = Math.min(clientAreaHeight, pixels - scrollHeight); |
| super.redraw(leftMargin, redrawY, scrollWidth, redrawHeight, true); |
| } |
| } else { |
| int destinationY = topMargin - pixels; |
| int scrollHeight = clientAreaHeight - destinationY - bottomMargin; |
| if (scrollHeight > 0) { |
| scroll(leftMargin, destinationY, leftMargin, topMargin, scrollWidth, scrollHeight, true); |
| } |
| if (destinationY > scrollHeight) { |
| int redrawY = Math.max(0, topMargin + scrollHeight); |
| int redrawHeight = Math.min(clientAreaHeight, -pixels - scrollHeight); |
| super.redraw(leftMargin, redrawY, scrollWidth, redrawHeight, true); |
| } |
| } |
| verticalScrollOffset += pixels; |
| calculateTopIndex(pixels); |
| } else { |
| calculateTopIndex(pixels); |
| super.redraw(); |
| } |
| int oldColumnX = columnX; |
| setCaretLocation(); |
| columnX = oldColumnX; |
| return true; |
| } |
| void scrollText(int srcY, int destY) { |
| if (srcY == destY) return; |
| int deltaY = destY - srcY; |
| int scrollWidth = clientAreaWidth - leftMargin - rightMargin, scrollHeight; |
| if (deltaY > 0) { |
| scrollHeight = clientAreaHeight - srcY - bottomMargin; |
| } else { |
| scrollHeight = clientAreaHeight - destY - bottomMargin; |
| } |
| scroll(leftMargin, destY, leftMargin, srcY, scrollWidth, scrollHeight, true); |
| if ((0 < srcY + scrollHeight) && (topMargin > srcY)) { |
| super.redraw(leftMargin, deltaY, scrollWidth, topMargin, false); |
| } |
| if ((0 < destY + scrollHeight) && (topMargin > destY)) { |
| super.redraw(leftMargin, 0, scrollWidth, topMargin, false); |
| } |
| if ((clientAreaHeight - bottomMargin < srcY + scrollHeight) && (clientAreaHeight > srcY)) { |
| super.redraw(leftMargin, clientAreaHeight - bottomMargin + deltaY, scrollWidth, bottomMargin, false); |
| } |
| if ((clientAreaHeight - bottomMargin < destY + scrollHeight) && (clientAreaHeight > destY)) { |
| super.redraw(leftMargin, clientAreaHeight - bottomMargin, scrollWidth, bottomMargin, false); |
| } |
| } |
| /** |
| * Selects all the text. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void selectAll() { |
| checkWidget(); |
| setSelection(0, Math.max(getCharCount(),0)); |
| } |
| /** |
| * Replaces/inserts text as defined by the event. |
| * |
| * @param event the text change event. |
| * <ul> |
| * <li>event.start - the replace start offset</li> |
| * <li>event.end - the replace end offset</li> |
| * <li>event.text - the new text</li> |
| * </ul> |
| */ |
| void sendKeyEvent(Event event) { |
| if (editable) { |
| modifyContent(event, true); |
| } |
| } |
| /** |
| * Returns a StyledTextEvent that can be used to request data such |
| * as styles and background color for a line. |
| * <p> |
| * The specified line may be a visual (wrapped) line if in word |
| * wrap mode. The returned object will always be for a logical |
| * (unwrapped) line. |
| * </p> |
| * |
| * @param lineOffset offset of the line. This may be the offset of |
| * a visual line if the widget is in word wrap mode. |
| * @param line line text. This may be the text of a visualline if |
| * the widget is in word wrap mode. |
| * @return StyledTextEvent that can be used to request line data |
| * for the given line. |
| */ |
| StyledTextEvent sendLineEvent(int eventType, int lineOffset, String line) { |
| StyledTextEvent event = null; |
| if (isListening(eventType)) { |
| event = new StyledTextEvent(content); |
| event.detail = lineOffset; |
| event.text = line; |
| event.alignment = alignment; |
| event.indent = indent; |
| event.justify = justify; |
| notifyListeners(eventType, event); |
| } |
| return event; |
| } |
| void sendModifyEvent(Event event) { |
| Accessible accessible = getAccessible(); |
| if (event.text.length() == 0) { |
| accessible.textChanged(ACC.TEXT_DELETE, event.start, event.end - event.start); |
| } else { |
| if (event.start == event.end) { |
| accessible.textChanged(ACC.TEXT_INSERT, event.start, event.text.length()); |
| } else { |
| accessible.textChanged(ACC.TEXT_DELETE, event.start, event.end - event.start); |
| accessible.textChanged(ACC.TEXT_INSERT, event.start, event.text.length()); |
| } |
| } |
| notifyListeners(SWT.Modify, event); |
| } |
| /** |
| * Sends the specified selection event. |
| */ |
| void sendSelectionEvent() { |
| getAccessible().textSelectionChanged(); |
| Event event = new Event(); |
| event.x = selection.x; |
| event.y = selection.y; |
| notifyListeners(SWT.Selection, event); |
| } |
| /** |
| * Sets the alignment of the widget. The argument should be one of <code>SWT.LEFT</code>, |
| * <code>SWT.CENTER</code> or <code>SWT.RIGHT</code>. The alignment applies for all lines. |
| * |
| * @param alignment the new alignment |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #setLineAlignment(int, int, int) |
| * |
| * @since 3.2 |
| */ |
| public void setAlignment(int alignment) { |
| checkWidget(); |
| alignment &= (SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| if (alignment == 0 || this.alignment == alignment) return; |
| this.alignment = alignment; |
| resetCache(0, content.getLineCount()); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * @see org.eclipse.swt.widgets.Control#setBackground |
| */ |
| public void setBackground(Color color) { |
| checkWidget(); |
| background = color; |
| super.redraw(); |
| } |
| /** |
| * Sets the receiver's caret. Set the caret's height and location. |
| * |
| * </p> |
| * @param caret the new caret for the receiver |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setCaret(Caret caret) { |
| checkWidget (); |
| super.setCaret(caret); |
| caretDirection = SWT.NULL; |
| if (caret != null) { |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Sets the BIDI coloring mode. When true the BIDI text display |
| * algorithm is applied to segments of text that are the same |
| * color. |
| * |
| * @param mode the new coloring mode |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @deprecated use BidiSegmentListener instead. |
| */ |
| public void setBidiColoring(boolean mode) { |
| checkWidget(); |
| bidiColoring = mode; |
| } |
| /** |
| * Moves the Caret to the current caret offset. |
| */ |
| void setCaretLocation() { |
| Point newCaretPos = getPointAtOffset(caretOffset); |
| setCaretLocation(newCaretPos, getCaretDirection()); |
| } |
| void setCaretLocation(Point location, int direction) { |
| Caret caret = getCaret(); |
| if (caret != null) { |
| boolean isDefaultCaret = caret == defaultCaret; |
| int lineHeight = renderer.getLineHeight(); |
| int caretHeight = lineHeight; |
| if (!isFixedLineHeight() && isDefaultCaret) { |
| caretHeight = getBoundsAtOffset(caretOffset).height; |
| if (caretHeight != lineHeight) { |
| direction = SWT.DEFAULT; |
| } |
| } |
| int imageDirection = direction; |
| if (isMirrored()) { |
| if (imageDirection == SWT.LEFT) { |
| imageDirection = SWT.RIGHT; |
| } else if (imageDirection == SWT.RIGHT) { |
| imageDirection = SWT.LEFT; |
| } |
| } |
| if (isDefaultCaret && imageDirection == SWT.RIGHT) { |
| location.x -= (caret.getSize().x - 1); |
| } |
| if (isDefaultCaret) { |
| caret.setBounds(location.x, location.y, 0, caretHeight); |
| } else { |
| caret.setLocation(location); |
| } |
| getAccessible().textCaretMoved(getCaretOffset()); |
| if (direction != caretDirection) { |
| caretDirection = direction; |
| if (isDefaultCaret) { |
| if (imageDirection == SWT.DEFAULT) { |
| defaultCaret.setImage(null); |
| } else if (imageDirection == SWT.LEFT) { |
| defaultCaret.setImage(leftCaretBitmap); |
| } else if (imageDirection == SWT.RIGHT) { |
| defaultCaret.setImage(rightCaretBitmap); |
| } |
| } |
| if (caretDirection == SWT.LEFT) { |
| BidiUtil.setKeyboardLanguage(BidiUtil.KEYBOARD_NON_BIDI); |
| } else if (caretDirection == SWT.RIGHT) { |
| BidiUtil.setKeyboardLanguage(BidiUtil.KEYBOARD_BIDI); |
| } |
| } |
| } |
| columnX = location.x; |
| } |
| /** |
| * Sets the caret offset. |
| * |
| * @param offset caret offset, relative to the first character in the text. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when either the start or the end of the selection range is inside a |
| * multi byte line delimiter (and thus neither clearly in front of or after the line delimiter) |
| * </ul> |
| */ |
| public void setCaretOffset(int offset) { |
| checkWidget(); |
| int length = getCharCount(); |
| if (length > 0 && offset != caretOffset) { |
| if (offset < 0) { |
| caretOffset = 0; |
| } else if (offset > length) { |
| caretOffset = length; |
| } else { |
| if (isLineDelimiter(offset)) { |
| // offset is inside a multi byte line delimiter. This is an |
| // illegal operation and an exception is thrown. Fixes 1GDKK3R |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| caretOffset = offset; |
| } |
| // clear the selection if the caret is moved. |
| // don't notify listeners about the selection change. |
| clearSelection(false); |
| } |
| setCaretLocation(); |
| } |
| /** |
| * Copies the specified text range to the clipboard. The text will be placed |
| * in the clipboard in plain text format and RTF format. |
| * |
| * @param start start index of the text |
| * @param length length of text to place in clipboard |
| * |
| * @exception SWTError, see Clipboard.setContents |
| * @see org.eclipse.swt.dnd.Clipboard#setContents |
| */ |
| void setClipboardContent(int start, int length, int clipboardType) throws SWTError { |
| if (clipboardType == DND.SELECTION_CLIPBOARD && !(IS_MOTIF || IS_GTK)) return; |
| TextTransfer plainTextTransfer = TextTransfer.getInstance(); |
| TextWriter plainTextWriter = new TextWriter(start, length); |
| String plainText = getPlatformDelimitedText(plainTextWriter); |
| Object[] data; |
| Transfer[] types; |
| if (clipboardType == DND.SELECTION_CLIPBOARD) { |
| data = new Object[]{plainText}; |
| types = new Transfer[]{plainTextTransfer}; |
| } else { |
| RTFTransfer rtfTransfer = RTFTransfer.getInstance(); |
| RTFWriter rtfWriter = new RTFWriter(start, length); |
| String rtfText = getPlatformDelimitedText(rtfWriter); |
| data = new Object[]{rtfText, plainText}; |
| types = new Transfer[]{rtfTransfer, plainTextTransfer}; |
| } |
| clipboard.setContents(data, types, clipboardType); |
| } |
| /** |
| * Sets the content implementation to use for text storage. |
| * |
| * @param newContent StyledTextContent implementation to use for text storage. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when listener is null</li> |
| * </ul> |
| */ |
| public void setContent(StyledTextContent newContent) { |
| checkWidget(); |
| if (newContent == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| if (content != null) { |
| content.removeTextChangeListener(textChangeListener); |
| } |
| content = newContent; |
| content.addTextChangeListener(textChangeListener); |
| reset(); |
| } |
| /** |
| * Sets the receiver's cursor to the cursor specified by the |
| * argument. Overridden to handle the null case since the |
| * StyledText widget uses an ibeam as its default cursor. |
| * |
| * @see org.eclipse.swt.widgets.Control#setCursor |
| */ |
| public void setCursor (Cursor cursor) { |
| if (cursor == null) { |
| Display display = getDisplay(); |
| super.setCursor(display.getSystemCursor(SWT.CURSOR_IBEAM)); |
| } else { |
| super.setCursor(cursor); |
| } |
| } |
| /** |
| * Sets whether the widget implements double click mouse behavior. |
| * </p> |
| * |
| * @param enable if true double clicking a word selects the word, if false |
| * double clicks have the same effect as regular mouse clicks. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setDoubleClickEnabled(boolean enable) { |
| checkWidget(); |
| doubleClickEnabled = enable; |
| } |
| /** |
| * Sets whether the widget content can be edited. |
| * </p> |
| * |
| * @param editable if true content can be edited, if false content can not be |
| * edited |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setEditable(boolean editable) { |
| checkWidget(); |
| this.editable = editable; |
| } |
| /** |
| * Sets a new font to render text with. |
| * <p> |
| * <b>NOTE:</b> Italic fonts are not supported unless they have no overhang |
| * and the same baseline as regular fonts. |
| * </p> |
| * |
| * @param font new font |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setFont(Font font) { |
| checkWidget(); |
| int oldLineHeight = renderer.getLineHeight(); |
| super.setFont(font); |
| renderer.setFont(getFont(), tabLength); |
| // keep the same top line visible. fixes 5815 |
| if (isFixedLineHeight()) { |
| int lineHeight = renderer.getLineHeight(); |
| if (lineHeight != oldLineHeight) { |
| int vscroll = (getVerticalScrollOffset() * lineHeight / oldLineHeight) - getVerticalScrollOffset(); |
| scrollVertical(vscroll, true); |
| } |
| } |
| resetCache(0, content.getLineCount()); |
| claimBottomFreeSpace(); |
| calculateScrollBars(); |
| if (isBidiCaret()) createCaretBitmaps(); |
| caretDirection = SWT.NULL; |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * @see org.eclipse.swt.widgets.Control#setForeground |
| */ |
| public void setForeground(Color color) { |
| checkWidget(); |
| foreground = color; |
| super.setForeground(getForeground()); |
| super.redraw(); |
| } |
| /** |
| * Sets the horizontal scroll offset relative to the start of the line. |
| * Do nothing if there is no text set. |
| * <p> |
| * <b>NOTE:</b> The horizontal index is reset to 0 when new text is set in the |
| * widget. |
| * </p> |
| * |
| * @param offset horizontal scroll offset relative to the start |
| * of the line, measured in character increments starting at 0, if |
| * equal to 0 the content is not scrolled, if > 0 = the content is scrolled. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setHorizontalIndex(int offset) { |
| checkWidget(); |
| if (getCharCount() == 0) { |
| return; |
| } |
| if (offset < 0) { |
| offset = 0; |
| } |
| offset *= getHorizontalIncrement(); |
| // allow any value if client area width is unknown or 0. |
| // offset will be checked in resize handler. |
| // don't use isVisible since width is known even if widget |
| // is temporarily invisible |
| if (clientAreaWidth > 0) { |
| int width = renderer.getWidth(); |
| // prevent scrolling if the content fits in the client area. |
| // align end of longest line with right border of client area |
| // if offset is out of range. |
| if (offset > width - clientAreaWidth) { |
| offset = Math.max(0, width - clientAreaWidth); |
| } |
| } |
| scrollHorizontal(offset - horizontalScrollOffset, true); |
| } |
| /** |
| * Sets the horizontal pixel offset relative to the start of the line. |
| * Do nothing if there is no text set. |
| * <p> |
| * <b>NOTE:</b> The horizontal pixel offset is reset to 0 when new text |
| * is set in the widget. |
| * </p> |
| * |
| * @param pixel horizontal pixel offset relative to the start |
| * of the line. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.0 |
| */ |
| public void setHorizontalPixel(int pixel) { |
| checkWidget(); |
| if (getCharCount() == 0) { |
| return; |
| } |
| if (pixel < 0) { |
| pixel = 0; |
| } |
| // allow any value if client area width is unknown or 0. |
| // offset will be checked in resize handler. |
| // don't use isVisible since width is known even if widget |
| // is temporarily invisible |
| if (clientAreaWidth > 0) { |
| int width = renderer.getWidth(); |
| // prevent scrolling if the content fits in the client area. |
| // align end of longest line with right border of client area |
| // if offset is out of range. |
| if (pixel > width - clientAreaWidth) { |
| pixel = Math.max(0, width - clientAreaWidth); |
| } |
| } |
| scrollHorizontal(pixel - horizontalScrollOffset, true); |
| } |
| /** |
| * Sets the line indentation of the widget. |
| * <p> |
| * It is the amount of blank space, in pixels, at the beginning of each line. |
| * When a line wraps in several lines only the first one is indented. |
| * </p> |
| * |
| * @param indent the new indent |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #setLineIndent(int, int, int) |
| * |
| * @since 3.2 |
| */ |
| public void setIndent(int indent) { |
| checkWidget(); |
| if (this.indent == indent || indent < 0) return; |
| this.indent = indent; |
| resetCache(0, content.getLineCount()); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * Sets whether the widget should justify lines. |
| * |
| * @param justify whether lines should be justified |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #setLineJustify(int, int, boolean) |
| * |
| * @since 3.2 |
| */ |
| public void setJustify(boolean justify) { |
| checkWidget(); |
| if (this.justify == justify) return; |
| this.justify = justify; |
| resetCache(0, content.getLineCount()); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * Maps a key to an action. |
| * <p> |
| * One action can be associated with N keys. However, each key can only |
| * have one action (key:action is N:1 relation). |
| * </p> |
| * |
| * @param key a key code defined in SWT.java or a character. |
| * Optionally ORd with a state mask. Preferred state masks are one or more of |
| * SWT.MOD1, SWT.MOD2, SWT.MOD3, since these masks account for modifier platform |
| * differences. However, there may be cases where using the specific state masks |
| * (i.e., SWT.CTRL, SWT.SHIFT, SWT.ALT, SWT.COMMAND) makes sense. |
| * @param action one of the predefined actions defined in ST.java. |
| * Use SWT.NULL to remove a key binding. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setKeyBinding(int key, int action) { |
| checkWidget(); |
| int modifierValue = key & SWT.MODIFIER_MASK; |
| char keyChar = (char)(key & SWT.KEY_MASK); |
| if (Compatibility.isLetter(keyChar)) { |
| // make the keybinding case insensitive by adding it |
| // in its upper and lower case form |
| char ch = Character.toUpperCase(keyChar); |
| int newKey = ch | modifierValue; |
| if (action == SWT.NULL) { |
| keyActionMap.remove(new Integer(newKey)); |
| } else { |
| keyActionMap.put(new Integer(newKey), new Integer(action)); |
| } |
| ch = Character.toLowerCase(keyChar); |
| newKey = ch | modifierValue; |
| if (action == SWT.NULL) { |
| keyActionMap.remove(new Integer(newKey)); |
| } else { |
| keyActionMap.put(new Integer(newKey), new Integer(action)); |
| } |
| } else { |
| if (action == SWT.NULL) { |
| keyActionMap.remove(new Integer(key)); |
| } else { |
| keyActionMap.put(new Integer(key), new Integer(action)); |
| } |
| } |
| } |
| /** |
| * Sets the alignment of the specified lines. The argument should be one of <code>SWT.LEFT</code>, |
| * <code>SWT.CENTER</code> or <code>SWT.RIGHT</code>. |
| * <p> |
| * Should not be called if a LineStyleListener has been set since the listener |
| * maintains the line attributes. |
| * </p><p> |
| * All line attributes are maintained relative to the line text, not the |
| * line index that is specified in this method call. |
| * During text changes, when entire lines are inserted or removed, the line |
| * attributes that are associated with the lines after the change |
| * will "move" with their respective text. An entire line is defined as |
| * extending from the first character on a line to the last and including the |
| * line delimiter. |
| * </p><p> |
| * When two lines are joined by deleting a line delimiter, the top line |
| * attributes take precedence and the attributes of the bottom line are deleted. |
| * For all other text changes line attributes will remain unchanged. |
| * |
| * @param startLine first line the alignment is applied to, 0 based |
| * @param lineCount number of lines the alignment applies to. |
| * @param alignment line alignment |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the specified line range is invalid</li> |
| * </ul> |
| * @see #setAlignment(int) |
| * @since 3.2 |
| */ |
| public void setLineAlignment(int startLine, int lineCount, int alignment) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (startLine < 0 || startLine + lineCount > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| renderer.setLineAlignment(startLine, lineCount, alignment); |
| resetCache(startLine, lineCount); |
| redrawLines(startLine, lineCount); |
| int caretLine = getCaretLine(); |
| if (startLine <= caretLine && caretLine < startLine + lineCount) { |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Sets the background color of the specified lines. |
| * <p> |
| * The background color is drawn for the width of the widget. All |
| * line background colors are discarded when setText is called. |
| * The text background color if defined in a StyleRange overlays the |
| * line background color. |
| * </p><p> |
| * Should not be called if a LineBackgroundListener has been set since the |
| * listener maintains the line backgrounds. |
| * </p><p> |
| * All line attributes are maintained relative to the line text, not the |
| * line index that is specified in this method call. |
| * During text changes, when entire lines are inserted or removed, the line |
| * attributes that are associated with the lines after the change |
| * will "move" with their respective text. An entire line is defined as |
| * extending from the first character on a line to the last and including the |
| * line delimiter. |
| * </p><p> |
| * When two lines are joined by deleting a line delimiter, the top line |
| * attributes take precedence and the attributes of the bottom line are deleted. |
| * For all other text changes line attributes will remain unchanged. |
| * </p> |
| * |
| * @param startLine first line the color is applied to, 0 based |
| * @param lineCount number of lines the color applies to. |
| * @param background line background color |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the specified line range is invalid</li> |
| * </ul> |
| */ |
| public void setLineBackground(int startLine, int lineCount, Color background) { |
| checkWidget(); |
| if (isListening(LineGetBackground)) return; |
| if (startLine < 0 || startLine + lineCount > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| if (background != null) { |
| renderer.setLineBackground(startLine, lineCount, background); |
| } else { |
| renderer.clearLineBackground(startLine, lineCount); |
| } |
| redrawLines(startLine, lineCount); |
| } |
| /** |
| * Sets the bullet of the specified lines. |
| * <p> |
| * Should not be called if a LineStyleListener has been set since the listener |
| * maintains the line attributes. |
| * </p><p> |
| * All line attributes are maintained relative to the line text, not the |
| * line index that is specified in this method call. |
| * During text changes, when entire lines are inserted or removed, the line |
| * attributes that are associated with the lines after the change |
| * will "move" with their respective text. An entire line is defined as |
| * extending from the first character on a line to the last and including the |
| * line delimiter. |
| * </p><p> |
| * When two lines are joined by deleting a line delimiter, the top line |
| * attributes take precedence and the attributes of the bottom line are deleted. |
| * For all other text changes line attributes will remain unchanged. |
| * </p> |
| * |
| * @param startLine first line the bullet is applied to, 0 based |
| * @param lineCount number of lines the bullet applies to. |
| * @param bullet line bullet |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the specified line range is invalid</li> |
| * </ul> |
| * @since 3.2 |
| */ |
| public void setLineBullet(int startLine, int lineCount, Bullet bullet) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (startLine < 0 || startLine + lineCount > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| renderer.setLineBullet(startLine, lineCount, bullet); |
| resetCache(startLine, lineCount); |
| redrawLines(startLine, lineCount); |
| int caretLine = getCaretLine(); |
| if (startLine <= caretLine && caretLine < startLine + lineCount) { |
| setCaretLocation(); |
| } |
| } |
| void setVariableLineHeight () { |
| if (!fixedLineHeight) return; |
| fixedLineHeight = false; |
| renderer.calculateIdle(); |
| } |
| /** |
| * Sets the indent of the specified lines. |
| * <p> |
| * Should not be called if a LineStyleListener has been set since the listener |
| * maintains the line attributes. |
| * </p><p> |
| * All line attributes are maintained relative to the line text, not the |
| * line index that is specified in this method call. |
| * During text changes, when entire lines are inserted or removed, the line |
| * attributes that are associated with the lines after the change |
| * will "move" with their respective text. An entire line is defined as |
| * extending from the first character on a line to the last and including the |
| * line delimiter. |
| * </p><p> |
| * When two lines are joined by deleting a line delimiter, the top line |
| * attributes take precedence and the attributes of the bottom line are deleted. |
| * For all other text changes line attributes will remain unchanged. |
| * </p> |
| * |
| * @param startLine first line the indent is applied to, 0 based |
| * @param lineCount number of lines the indent applies to. |
| * @param indent line indent |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the specified line range is invalid</li> |
| * </ul> |
| * @see #setIndent(int) |
| * @since 3.2 |
| */ |
| public void setLineIndent(int startLine, int lineCount, int indent) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (startLine < 0 || startLine + lineCount > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| renderer.setLineIndent(startLine, lineCount, indent); |
| resetCache(startLine, lineCount); |
| redrawLines(startLine, lineCount); |
| int caretLine = getCaretLine(); |
| if (startLine <= caretLine && caretLine < startLine + lineCount) { |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Sets the justify of the specified lines. |
| * <p> |
| * Should not be called if a LineStyleListener has been set since the listener |
| * maintains the line attributes. |
| * </p><p> |
| * All line attributes are maintained relative to the line text, not the |
| * line index that is specified in this method call. |
| * During text changes, when entire lines are inserted or removed, the line |
| * attributes that are associated with the lines after the change |
| * will "move" with their respective text. An entire line is defined as |
| * extending from the first character on a line to the last and including the |
| * line delimiter. |
| * </p><p> |
| * When two lines are joined by deleting a line delimiter, the top line |
| * attributes take precedence and the attributes of the bottom line are deleted. |
| * For all other text changes line attributes will remain unchanged. |
| * </p> |
| * |
| * @param startLine first line the justify is applied to, 0 based |
| * @param lineCount number of lines the justify applies to. |
| * @param justify true if lines should be justified |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when the specified line range is invalid</li> |
| * </ul> |
| * @see #setJustify(boolean) |
| * @since 3.2 |
| */ |
| public void setLineJustify(int startLine, int lineCount, boolean justify) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (startLine < 0 || startLine + lineCount > content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| renderer.setLineJustify(startLine, lineCount, justify); |
| resetCache(startLine, lineCount); |
| redrawLines(startLine, lineCount); |
| int caretLine = getCaretLine(); |
| if (startLine <= caretLine && caretLine < startLine + lineCount) { |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Sets the line spacing of the widget. The line spacing applies for all lines. |
| * |
| * @param lineSpacing the line spacing |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 3.2 |
| */ |
| public void setLineSpacing(int lineSpacing) { |
| checkWidget(); |
| if (this.lineSpacing == lineSpacing || lineSpacing < 0) return; |
| this.lineSpacing = lineSpacing; |
| setVariableLineHeight(); |
| resetCache(0, content.getLineCount()); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| void setMargins (int leftMargin, int topMargin, int rightMargin, int bottomMargin) { |
| checkWidget(); |
| this.leftMargin = leftMargin; |
| this.topMargin = topMargin; |
| this.rightMargin = rightMargin; |
| this.bottomMargin = bottomMargin; |
| setCaretLocation(); |
| } |
| /** |
| * Flips selection anchor based on word selection direction. |
| */ |
| void setMouseWordSelectionAnchor() { |
| if (mouseDoubleClick) { |
| if (caretOffset < doubleClickSelection.x) { |
| selectionAnchor = doubleClickSelection.y; |
| } else if (caretOffset > doubleClickSelection.y) { |
| selectionAnchor = doubleClickSelection.x; |
| } |
| } |
| } |
| /** |
| * Sets the orientation of the receiver, which must be one |
| * of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>. |
| * |
| * @param orientation new orientation style |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @since 2.1.2 |
| */ |
| public void setOrientation(int orientation) { |
| if ((orientation & (SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT)) == 0) { |
| return; |
| } |
| if ((orientation & SWT.RIGHT_TO_LEFT) != 0 && (orientation & SWT.LEFT_TO_RIGHT) != 0) { |
| return; |
| } |
| if ((orientation & SWT.RIGHT_TO_LEFT) != 0 && isMirrored()) { |
| return; |
| } |
| if ((orientation & SWT.LEFT_TO_RIGHT) != 0 && !isMirrored()) { |
| return; |
| } |
| if (!BidiUtil.setOrientation(handle, orientation)) { |
| return; |
| } |
| isMirrored = (orientation & SWT.RIGHT_TO_LEFT) != 0; |
| caretDirection = SWT.NULL; |
| setCaretLocation(); |
| keyActionMap.clear(); |
| createKeyBindings(); |
| super.redraw(); |
| } |
| /** |
| * Adjusts the maximum and the page size of the scroll bars to |
| * reflect content width/length changes. |
| * |
| * @param vertical indicates if the vertical scrollbar also needs to be set |
| */ |
| void setScrollBars(boolean vertical) { |
| int inactive = 1; |
| if (vertical || !isFixedLineHeight()) { |
| ScrollBar verticalBar = getVerticalBar(); |
| if (verticalBar != null) { |
| int maximum = renderer.getHeight(); |
| // only set the real values if the scroll bar can be used |
| // (ie. because the thumb size is less than the scroll maximum) |
| // avoids flashing on Motif, fixes 1G7RE1J and 1G5SE92 |
| if (clientAreaHeight < maximum) { |
| verticalBar.setValues( |
| verticalBar.getSelection(), |
| verticalBar.getMinimum(), |
| maximum, |
| clientAreaHeight, // thumb size |
| verticalBar.getIncrement(), |
| clientAreaHeight); // page size |
| } else if (verticalBar.getThumb() != inactive || verticalBar.getMaximum() != inactive) { |
| verticalBar.setValues( |
| verticalBar.getSelection(), |
| verticalBar.getMinimum(), |
| inactive, |
| inactive, |
| verticalBar.getIncrement(), |
| inactive); |
| } |
| } |
| } |
| ScrollBar horizontalBar = getHorizontalBar(); |
| if (horizontalBar != null && horizontalBar.getVisible()) { |
| int maximum = renderer.getWidth(); |
| // only set the real values if the scroll bar can be used |
| // (ie. because the thumb size is less than the scroll maximum) |
| // avoids flashing on Motif, fixes 1G7RE1J and 1G5SE92 |
| if (clientAreaWidth < maximum) { |
| horizontalBar.setValues( |
| horizontalBar.getSelection(), |
| horizontalBar.getMinimum(), |
| maximum, |
| clientAreaWidth - leftMargin - rightMargin, // thumb size |
| horizontalBar.getIncrement(), |
| clientAreaWidth - leftMargin - rightMargin); // page size |
| } else if (horizontalBar.getThumb() != inactive || horizontalBar.getMaximum() != inactive) { |
| horizontalBar.setValues( |
| horizontalBar.getSelection(), |
| horizontalBar.getMinimum(), |
| inactive, |
| inactive, |
| horizontalBar.getIncrement(), |
| inactive); |
| } |
| } |
| } |
| /** |
| * Sets the selection to the given position and scrolls it into view. Equivalent to setSelection(start,start). |
| * |
| * @param start new caret position |
| * @see #setSelection(int,int) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when either the start or the end of the selection range is inside a |
| * multi byte line delimiter (and thus neither clearly in front of or after the line delimiter) |
| * </ul> |
| */ |
| public void setSelection(int start) { |
| // checkWidget test done in setSelectionRange |
| setSelection(start, start); |
| } |
| /** |
| * Sets the selection and scrolls it into view. |
| * <p> |
| * Indexing is zero based. Text selections are specified in terms of |
| * caret positions. In a text widget that contains N characters, there are |
| * N+1 caret positions, ranging from 0..N |
| * </p> |
| * |
| * @param point x=selection start offset, y=selection end offset |
| * The caret will be placed at the selection start when x > y. |
| * @see #setSelection(int,int) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when point is null</li> |
| * <li>ERROR_INVALID_ARGUMENT when either the start or the end of the selection range is inside a |
| * multi byte line delimiter (and thus neither clearly in front of or after the line delimiter) |
| * </ul> |
| */ |
| public void setSelection(Point point) { |
| checkWidget(); |
| if (point == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| setSelection(point.x, point.y); |
| } |
| /** |
| * Sets the receiver's selection background color to the color specified |
| * by the argument, or to the default system color for the control |
| * if the argument is null. |
| * |
| * @param color the new color (or null) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.1 |
| */ |
| public void setSelectionBackground (Color color) { |
| checkWidget (); |
| if (color != null) { |
| if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| selectionBackground = color; |
| super.redraw(); |
| } |
| /** |
| * Sets the receiver's selection foreground color to the color specified |
| * by the argument, or to the default system color for the control |
| * if the argument is null. |
| * |
| * @param color the new color (or null) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.1 |
| */ |
| public void setSelectionForeground (Color color) { |
| checkWidget (); |
| if (color != null) { |
| if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| selectionForeground = color; |
| super.redraw(); |
| } |
| /** |
| * Sets the selection and scrolls it into view. |
| * <p> |
| * Indexing is zero based. Text selections are specified in terms of |
| * caret positions. In a text widget that contains N characters, there are |
| * N+1 caret positions, ranging from 0..N |
| * </p> |
| * |
| * @param start selection start offset. The caret will be placed at the |
| * selection start when start > end. |
| * @param end selection end offset |
| * @see #setSelectionRange(int,int) |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when either the start or the end of the selection range is inside a |
| * multi byte line delimiter (and thus neither clearly in front of or after the line delimiter) |
| * </ul> |
| */ |
| public void setSelection(int start, int end) { |
| setSelectionRange(start, end - start); |
| showSelection(); |
| } |
| /** |
| * Sets the selection. |
| * <p> |
| * The new selection may not be visible. Call showSelection to scroll |
| * the selection into view. |
| * </p> |
| * |
| * @param start offset of the first selected character, start >= 0 must be true. |
| * @param length number of characters to select, 0 <= start + length |
| * <= getCharCount() must be true. |
| * A negative length places the caret at the selection start. |
| * @param sendEvent a Selection event is sent when set to true and when |
| * the selection is reset. |
| */ |
| void setSelection(int start, int length, boolean sendEvent) { |
| int end = start + length; |
| if (start > end) { |
| int temp = end; |
| end = start; |
| start = temp; |
| } |
| // is the selection range different or is the selection direction |
| // different? |
| if (selection.x != start || selection.y != end || |
| (length > 0 && selectionAnchor != selection.x) || |
| (length < 0 && selectionAnchor != selection.y)) { |
| clearSelection(sendEvent); |
| if (length < 0) { |
| selectionAnchor = selection.y = end; |
| caretOffset = selection.x = start; |
| } else { |
| selectionAnchor = selection.x = start; |
| caretOffset = selection.y = end; |
| } |
| internalRedrawRange(selection.x, selection.y - selection.x); |
| } |
| } |
| /** |
| * Sets the selection. |
| * <p> |
| * The new selection may not be visible. Call showSelection to scroll the selection |
| * into view. A negative length places the caret at the visual start of the selection. |
| * </p> |
| * |
| * @param start offset of the first selected character |
| * @param length number of characters to select |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT when either the start or the end of the selection range is inside a |
| * multi byte line delimiter (and thus neither clearly in front of or after the line delimiter) |
| * </ul> |
| */ |
| public void setSelectionRange(int start, int length) { |
| checkWidget(); |
| int contentLength = getCharCount(); |
| start = Math.max(0, Math.min (start, contentLength)); |
| int end = start + length; |
| if (end < 0) { |
| length = -start; |
| } else { |
| if (end > contentLength) length = contentLength - start; |
| } |
| if (isLineDelimiter(start) || isLineDelimiter(start + length)) { |
| // the start offset or end offset of the selection range is inside a |
| // multi byte line delimiter. This is an illegal operation and an exception |
| // is thrown. Fixes 1GDKK3R |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| setSelection(start, length, false); |
| setCaretLocation(); |
| } |
| /** |
| * Adds the specified style. |
| * <p> |
| * The new style overwrites existing styles for the specified range. |
| * Existing style ranges are adjusted if they partially overlap with |
| * the new style. To clear an individual style, call setStyleRange |
| * with a StyleRange that has null attributes. |
| * </p><p> |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param range StyleRange object containing the style information. |
| * Overwrites the old style in the given range. May be null to delete |
| * all styles. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE when the style range is outside the valid range (> getCharCount())</li> |
| * </ul> |
| */ |
| public void setStyleRange(StyleRange range) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (range != null) { |
| if (range.isUnstyled()) { |
| setStyleRanges(range.start, range.length, null, null, false); |
| } else { |
| setStyleRanges(range.start, 0, null, new StyleRange[]{range}, false); |
| } |
| } else { |
| setStyleRanges(0, 0, null, null, true); |
| } |
| } |
| /** |
| * Clears the styles in the range specified by <code>start</code> and |
| * <code>length</code> and adds the new styles. |
| * <p> |
| * The ranges array contains start and length pairs. Each pair refers to |
| * the corresponding style in the styles array. For example, the pair |
| * that starts at ranges[n] with length ranges[n+1] uses the style |
| * at styles[n/2]. The range fields within each StyleRange are ignored. |
| * If ranges or styles is null, the specified range is cleared. |
| * </p><p> |
| * Note: It is expected that the same instance of a StyleRange will occur |
| * multiple times within the styles array, reducing memory usage. |
| * </p><p> |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param start offset of first character where styles will be deleted |
| * @param length length of the range to delete styles in |
| * @param ranges the array of ranges. The ranges must not overlap and must be in order. |
| * @param styles the array of StyleRanges. The range fields within the StyleRange are unused. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when an element in the styles array is null</li> |
| * <li>ERROR_INVALID_RANGE when the number of ranges and style do not match (ranges.length * 2 == styles.length)</li> |
| * <li>ERROR_INVALID_RANGE when a range is outside the valid range (> getCharCount() or less than zero)</li> |
| * <li>ERROR_INVALID_RANGE when a range overlaps</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public void setStyleRanges(int start, int length, int[] ranges, StyleRange[] styles) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (ranges == null || styles == null) { |
| setStyleRanges(start, length, null, null, false); |
| } else { |
| setStyleRanges(start, length, ranges, styles, false); |
| } |
| } |
| /** |
| * Sets styles to be used for rendering the widget content. |
| * <p> |
| * All styles in the widget will be replaced with the given set of ranges and styles. |
| * The ranges array contains start and length pairs. Each pair refers to |
| * the corresponding style in the styles array. For example, the pair |
| * that starts at ranges[n] with length ranges[n+1] uses the style |
| * at styles[n/2]. The range fields within each StyleRange are ignored. |
| * If either argument is null, the styles are cleared. |
| * </p><p> |
| * Note: It is expected that the same instance of a StyleRange will occur |
| * multiple times within the styles array, reducing memory usage. |
| * </p><p> |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param ranges the array of ranges. The ranges must not overlap and must be in order. |
| * @param styles the array of StyleRanges. The range fields within the StyleRange are unused. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when an element in the styles array is null</li> |
| * <li>ERROR_INVALID_RANGE when the number of ranges and style do not match (ranges.length * 2 == styles.length)</li> |
| * <li>ERROR_INVALID_RANGE when a range is outside the valid range (> getCharCount() or less than zero)</li> |
| * <li>ERROR_INVALID_RANGE when a range overlaps</li> |
| * </ul> |
| * |
| * @since 3.2 |
| */ |
| public void setStyleRanges(int[] ranges, StyleRange[] styles) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (ranges == null || styles == null) { |
| setStyleRanges(0, 0, null, null, true); |
| } else { |
| setStyleRanges(0, 0, ranges, styles, true); |
| } |
| } |
| void setStyleRanges(int start, int length, int[] ranges, StyleRange[] styles, boolean reset) { |
| int charCount = content.getCharCount(); |
| int end = start + length; |
| if (start > end || start < 0) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (styles != null) { |
| if (end > charCount) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (ranges != null) { |
| if (ranges.length != styles.length << 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| int lastOffset = 0; |
| boolean variableHeight = false; |
| for (int i = 0; i < styles.length; i ++) { |
| if (styles[i] == null) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int rangeStart, rangeLength; |
| if (ranges != null) { |
| rangeStart = ranges[i << 1]; |
| rangeLength = ranges[(i << 1) + 1]; |
| } else { |
| rangeStart = styles[i].start; |
| rangeLength = styles[i].length; |
| } |
| if (rangeLength < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| if (!(0 <= rangeStart && rangeStart + rangeLength <= charCount)) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| if (lastOffset > rangeStart) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| variableHeight |= styles[i].isVariableHeight(); |
| lastOffset = rangeStart + rangeLength; |
| } |
| if (variableHeight) setVariableLineHeight(); |
| } |
| int rangeStart = start, rangeEnd = end; |
| if (styles != null && styles.length > 0) { |
| if (ranges != null) { |
| rangeStart = ranges[0]; |
| rangeEnd = ranges[ranges.length - 2] + ranges[ranges.length - 1]; |
| } else { |
| rangeStart = styles[0].start; |
| rangeEnd = styles[styles.length - 1].start + styles[styles.length - 1].length; |
| } |
| } |
| int lastLineBottom = 0; |
| if (!isFixedLineHeight() && !reset) { |
| int lineEnd = content.getLineAtOffset(Math.max(end, rangeEnd)); |
| int partialTopIndex = getPartialTopIndex(); |
| int partialBottomIndex = getPartialBottomIndex(); |
| if (partialTopIndex <= lineEnd && lineEnd <= partialBottomIndex) { |
| lastLineBottom = getLinePixel(lineEnd + 1); |
| } |
| } |
| if (reset) { |
| renderer.setStyleRanges(null, null); |
| } else { |
| renderer.updateRanges(start, length, length); |
| } |
| if (styles != null && styles.length > 0) { |
| renderer.setStyleRanges(ranges, styles); |
| } |
| if (reset) { |
| resetCache(0, content.getLineCount()); |
| super.redraw(); |
| } else { |
| int lineStart = content.getLineAtOffset(Math.min(start, rangeStart)); |
| int lineEnd = content.getLineAtOffset(Math.max(end, rangeEnd)); |
| resetCache(lineStart, lineEnd - lineStart + 1); |
| int partialTopIndex = getPartialTopIndex(); |
| int partialBottomIndex = getPartialBottomIndex(); |
| if (!(lineStart > partialBottomIndex || lineEnd < partialTopIndex)) { |
| int y = 0; |
| int height = clientAreaHeight; |
| if (partialTopIndex <= lineStart && lineStart <= partialBottomIndex) { |
| int lineTop = Math.max(y, getLinePixel(lineStart)); |
| y = lineTop; |
| height -= lineTop; |
| } |
| if (partialTopIndex <= lineEnd && lineEnd <= partialBottomIndex) { |
| int newLastLineBottom = getLinePixel(lineEnd + 1); |
| if (!isFixedLineHeight()) { |
| scrollText(lastLineBottom, newLastLineBottom); |
| } |
| height = newLastLineBottom - y; |
| } |
| super.redraw(0, y, clientAreaWidth, height, false); |
| } |
| } |
| setCaretLocation(); |
| } |
| /** |
| * Sets styles to be used for rendering the widget content. All styles |
| * in the widget will be replaced with the given set of styles. |
| * <p> |
| * Note: Because a StyleRange includes the start and length, the |
| * same instance cannot occur multiple times in the array of styles. |
| * If the same style attributes, such as font and color, occur in |
| * multiple StyleRanges, <code>setStyleRanges(int[], StyleRange[])</code> |
| * can be used to share styles and reduce memory usage. |
| * </p><p> |
| * Should not be called if a LineStyleListener has been set since the |
| * listener maintains the styles. |
| * </p> |
| * |
| * @param ranges StyleRange objects containing the style information. |
| * The ranges should not overlap. The style rendering is undefined if |
| * the ranges do overlap. Must not be null. The styles need to be in order. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when the list of ranges is null</li> |
| * <li>ERROR_INVALID_RANGE when the last of the style ranges is outside the valid range (> getCharCount())</li> |
| * </ul> |
| * |
| * @see #setStyleRanges(int[], StyleRange[]) |
| */ |
| public void setStyleRanges(StyleRange[] ranges) { |
| checkWidget(); |
| if (isListening(LineGetStyle)) return; |
| if (ranges == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| setStyleRanges(0, 0, null, ranges, true); |
| } |
| /** |
| * Sets the tab width. |
| * |
| * @param tabs tab width measured in characters. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setTabs(int tabs) { |
| checkWidget(); |
| tabLength = tabs; |
| renderer.setFont(null, tabs); |
| if (caretOffset > 0) { |
| caretOffset = 0; |
| showCaret(); |
| clearSelection(false); |
| } |
| resetCache(0, content.getLineCount()); |
| super.redraw(); |
| } |
| /** |
| * Sets the widget content. |
| * If the widget has the SWT.SINGLE style and "text" contains more than |
| * one line, only the first line is rendered but the text is stored |
| * unchanged. A subsequent call to getText will return the same text |
| * that was set. |
| * <p> |
| * <b>Note:</b> Only a single line of text should be set when the SWT.SINGLE |
| * style is used. |
| * </p> |
| * |
| * @param text new widget content. Replaces existing content. Line styles |
| * that were set using StyledText API are discarded. The |
| * current selection is also discarded. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when string is null</li> |
| * </ul> |
| */ |
| public void setText(String text) { |
| checkWidget(); |
| if (text == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| Event event = new Event(); |
| event.start = 0; |
| event.end = getCharCount(); |
| event.text = text; |
| event.doit = true; |
| notifyListeners(SWT.Verify, event); |
| if (event.doit) { |
| StyledTextEvent styledTextEvent = null; |
| if (isListening(ExtendedModify)) { |
| styledTextEvent = new StyledTextEvent(content); |
| styledTextEvent.start = event.start; |
| styledTextEvent.end = event.start + event.text.length(); |
| styledTextEvent.text = content.getTextRange(event.start, event.end - event.start); |
| } |
| content.setText(event.text); |
| sendModifyEvent(event); |
| if (styledTextEvent != null) { |
| notifyListeners(ExtendedModify, styledTextEvent); |
| } |
| } |
| } |
| /** |
| * Sets the text limit to the specified number of characters. |
| * <p> |
| * The text limit specifies the amount of text that |
| * the user can type into the widget. |
| * </p> |
| * |
| * @param limit the new text limit. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_CANNOT_BE_ZERO when limit is 0</li> |
| * </ul> |
| */ |
| public void setTextLimit(int limit) { |
| checkWidget(); |
| if (limit == 0) { |
| SWT.error(SWT.ERROR_CANNOT_BE_ZERO); |
| } |
| textLimit = limit; |
| } |
| /** |
| * Sets the top index. Do nothing if there is no text set. |
| * <p> |
| * The top index is the index of the line that is currently at the top |
| * of the widget. The top index changes when the widget is scrolled. |
| * Indexing starts from zero. |
| * Note: The top index is reset to 0 when new text is set in the widget. |
| * </p> |
| * |
| * @param topIndex new top index. Must be between 0 and |
| * getLineCount() - fully visible lines per page. If no lines are fully |
| * visible the maximum value is getLineCount() - 1. An out of range |
| * index will be adjusted accordingly. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setTopIndex(int topIndex) { |
| checkWidget(); |
| if (getCharCount() == 0) { |
| return; |
| } |
| int lineCount = content.getLineCount(), pixel; |
| if (isFixedLineHeight()) { |
| int pageSize = Math.max(1, Math.min(lineCount, getLineCountWhole())); |
| if (topIndex < 0) { |
| topIndex = 0; |
| } else if (topIndex > lineCount - pageSize) { |
| topIndex = lineCount - pageSize; |
| } |
| pixel = getLinePixel(topIndex); |
| } else { |
| topIndex = Math.max(0, Math.min(lineCount - 1, topIndex)); |
| pixel = getLinePixel(topIndex); |
| if (pixel > 0) { |
| pixel = getAvailableHeightBellow(pixel); |
| } else { |
| pixel = getAvailableHeightAbove(pixel); |
| } |
| } |
| scrollVertical(pixel, true); |
| } |
| /** |
| * Sets the top pixel offset. Do nothing if there is no text set. |
| * <p> |
| * The top pixel offset is the vertical pixel offset of the widget. The |
| * widget is scrolled so that the given pixel position is at the top. |
| * The top index is adjusted to the corresponding top line. |
| * Note: The top pixel is reset to 0 when new text is set in the widget. |
| * </p> |
| * |
| * @param pixel new top pixel offset. Must be between 0 and |
| * (getLineCount() - visible lines per page) / getLineHeight()). An out |
| * of range offset will be adjusted accordingly. |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @since 2.0 |
| */ |
| public void setTopPixel(int pixel) { |
| checkWidget(); |
| if (getCharCount() == 0) { |
| return; |
| } |
| if (pixel < 0) pixel = 0; |
| int lineCount = content.getLineCount(); |
| int height = clientAreaHeight - topMargin - bottomMargin; |
| int verticalOffset = getVerticalScrollOffset(); |
| if (isFixedLineHeight()) { |
| int maxTopPixel = Math.max(0, lineCount * getVerticalIncrement() - height); |
| if (pixel > maxTopPixel) pixel = maxTopPixel; |
| pixel -= verticalOffset; |
| } else { |
| pixel -= verticalOffset; |
| if (pixel > 0) { |
| pixel = getAvailableHeightBellow(pixel); |
| } |
| } |
| scrollVertical(pixel, true); |
| } |
| /** |
| * Sets whether the widget wraps lines. |
| * <p> |
| * This overrides the creation style bit SWT.WRAP. |
| * </p> |
| * |
| * @param wrap true=widget wraps lines, false=widget does not wrap lines |
| * @since 2.0 |
| */ |
| public void setWordWrap(boolean wrap) { |
| checkWidget(); |
| if ((getStyle() & SWT.SINGLE) != 0) return; |
| if (wordWrap == wrap) return; |
| wordWrap = wrap; |
| setVariableLineHeight(); |
| resetCache(0, content.getLineCount()); |
| horizontalScrollOffset = 0; |
| ScrollBar horizontalBar = getHorizontalBar(); |
| if (horizontalBar != null) { |
| horizontalBar.setVisible(!wordWrap); |
| } |
| setScrollBars(true); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * Scrolls the specified location into view. |
| * |
| * @param x the x coordinate that should be made visible. |
| * @param line the line that should be made visible. Relative to the |
| * first line in the document. |
| * @return |
| * true=the widget was scrolled to make the specified location visible. |
| * false=the specified location is already visible, the widget was |
| * not scrolled. |
| */ |
| boolean showLocation(Rectangle rect) { |
| int clientAreaWidth = this.clientAreaWidth - leftMargin - rightMargin; |
| int clientAreaHeight = this.clientAreaHeight - topMargin - bottomMargin; |
| boolean scrolled = false; |
| if (rect.y <= topMargin) { |
| scrolled = scrollVertical(rect.y - topMargin, true); |
| } else if (rect.y + rect.height > clientAreaHeight) { |
| scrolled = scrollVertical(rect.y + rect.height - clientAreaHeight, true); |
| } |
| if (clientAreaWidth > 0) { |
| // always make 1/4 of a page visible |
| if (rect.x < leftMargin) { |
| int scrollWidth = Math.max(leftMargin - rect.x, clientAreaWidth / 4); |
| int maxScroll = horizontalScrollOffset; |
| scrolled = scrollHorizontal(-Math.min(maxScroll, scrollWidth), true); |
| } else if (rect.x + rect.width > clientAreaWidth) { |
| int scrollWidth = Math.max(rect.x + rect.width - clientAreaWidth, clientAreaWidth / 4); |
| int maxScroll = renderer.getWidth() - horizontalScrollOffset - this.clientAreaWidth; |
| scrolled = scrollHorizontal(Math.min(maxScroll, scrollWidth), true); |
| } |
| } |
| return scrolled; |
| } |
| /** |
| * Sets the caret location and scrolls the caret offset into view. |
| */ |
| void showCaret() { |
| Rectangle bounds = getBoundsAtOffset(caretOffset); |
| if (!showLocation(bounds)) { |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Scrolls the selection into view. |
| * <p> |
| * The end of the selection will be scrolled into view. |
| * Note that if a right-to-left selection exists, the end of the selection is |
| * the visual beginning of the selection (i.e., where the caret is located). |
| * </p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void showSelection() { |
| checkWidget(); |
| // is selection from right-to-left? |
| boolean rightToLeft = caretOffset == selection.x; |
| int startOffset, endOffset; |
| if (rightToLeft) { |
| startOffset = selection.y; |
| endOffset = selection.x; |
| } else { |
| startOffset = selection.x; |
| endOffset = selection.y; |
| } |
| |
| Rectangle startBounds = getBoundsAtOffset(startOffset); |
| Rectangle endBounds = getBoundsAtOffset(endOffset); |
| |
| // can the selection be fully displayed within the widget's visible width? |
| int w = clientAreaWidth; |
| boolean selectionFits = rightToLeft ? startBounds.x - endBounds.x <= w : endBounds.x - startBounds.x <= w; |
| if (selectionFits) { |
| // show as much of the selection as possible by first showing |
| // the start of the selection |
| if (showLocation(startBounds)) { |
| // endX value could change if showing startX caused a scroll to occur |
| endBounds = getBoundsAtOffset(endOffset); |
| } |
| showLocation(endBounds); |
| } else { |
| // just show the end of the selection since the selection start |
| // will not be visible |
| showLocation(endBounds); |
| } |
| } |
| /** |
| * Updates the selection and caret position depending on the text change. |
| * <p> |
| * If the selection intersects with the replaced text, the selection is |
| * reset and the caret moved to the end of the new text. |
| * If the selection is behind the replaced text it is moved so that the |
| * same text remains selected. If the selection is before the replaced text |
| * it is left unchanged. |
| * </p> |
| * |
| * @param startOffset offset of the text change |
| * @param replacedLength length of text being replaced |
| * @param newLength length of new text |
| */ |
| void updateSelection(int startOffset, int replacedLength, int newLength) { |
| if (selection.y <= startOffset) { |
| // selection ends before text change |
| return; |
| } |
| if (selection.x < startOffset) { |
| // clear selection fragment before text change |
| internalRedrawRange(selection.x, startOffset - selection.x); |
| } |
| if (selection.y > startOffset + replacedLength && selection.x < startOffset + replacedLength) { |
| // clear selection fragment after text change. |
| // do this only when the selection is actually affected by the |
| // change. Selection is only affected if it intersects the change (1GDY217). |
| int netNewLength = newLength - replacedLength; |
| int redrawStart = startOffset + newLength; |
| internalRedrawRange(redrawStart, selection.y + netNewLength - redrawStart); |
| } |
| if (selection.y > startOffset && selection.x < startOffset + replacedLength) { |
| // selection intersects replaced text. set caret behind text change |
| setSelection(startOffset + newLength, 0, true); |
| } else { |
| // move selection to keep same text selected |
| setSelection(selection.x + newLength - replacedLength, selection.y - selection.x, true); |
| } |
| setCaretLocation(); |
| } |
| } |
