| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </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> |
| */ |
| 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 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; |
| |
| Color selectionBackground; // selection background color |
| Color selectionForeground; // selection foreground color |
| StyledTextContent logicalContent; // native content (default or user specified) |
| StyledTextContent content; // line wrapping content, same as logicalContent if word wrap is off |
| DisplayRenderer renderer; |
| Listener listener; |
| TextChangeListener textChangeListener; // listener for TextChanging, TextChanged and TextSet events from StyledTextContent |
| DefaultLineStyler defaultLineStyler;// used for setStyles API when no LineStyleListener is registered |
| LineCache lineCache; |
| boolean userLineStyle = false; // true=widget is using a user defined line style listener for line styles. false=widget is using the default line styler to store line styles |
| boolean userLineBackground = false; // true=widget is using a user defined line background listener for line backgrounds. false=widget is using the default line styler to store line backgrounds |
| int verticalScrollOffset = 0; // pixel based |
| int horizontalScrollOffset = 0; // pixel based |
| int topIndex = 0; // top visible line |
| int lastPaintTopIndex = -1; |
| int topOffset = 0; // offset of first character in top line |
| 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 lineHeight; // line height=font height |
| int tabLength = 4; // number of characters in a tab |
| int leftMargin; |
| int topMargin; |
| int rightMargin; |
| int bottomMargin; |
| Cursor ibeamCursor; |
| int columnX; // keep track of the horizontal caret position |
| // when changing lines/pages. Fixes bug 5935 |
| int caretOffset = 0; |
| 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; |
| 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; |
| boolean advancing = true; |
| Caret defaultCaret = null; |
| boolean updateCaretDirection = true; |
| |
| final static boolean IS_CARBON, IS_GTK, IS_MOTIF; |
| final static boolean DOUBLE_BUFFER; |
| static { |
| String platform = SWT.getPlatform(); |
| IS_CARBON = "carbon".equals(platform); |
| IS_GTK = "gtk".equals(platform); |
| IS_MOTIF = "motif".equals(platform); |
| DOUBLE_BUFFER = !IS_CARBON; |
| } |
| |
| /** |
| * 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 |
| |
| StyledText parent; |
| Printer printer; |
| PrintRenderer renderer; |
| StyledTextPrintOptions printOptions; |
| StyledTextContent printerContent; // copy of the widget content |
| Rectangle clientArea; // client area to print on |
| Font printerFont; |
| FontData displayFontData; |
| Hashtable printerColors; // printer color cache for line backgrounds and style |
| Hashtable lineBackgrounds = new Hashtable(); // cached line backgrounds |
| Hashtable lineStyles = new Hashtable(); // cached line styles |
| Hashtable bidiSegments = new Hashtable(); // cached bidi segments when running on a bidi platform |
| 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 pageSize; // number of lines on a page |
| 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 |
| |
| /** |
| * 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 parent, Printer printer, StyledTextPrintOptions printOptions) { |
| PrinterData data = printer.getPrinterData(); |
| |
| this.parent = parent; |
| this.printer = printer; |
| this.printOptions = printOptions; |
| this.mirrored = (parent.getStyle() & SWT.MIRRORED) != 0; |
| singleLine = parent.isSingleLine(); |
| startPage = 1; |
| endPage = Integer.MAX_VALUE; |
| 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 = parent.getSelectionRange(); |
| } |
| |
| displayFontData = parent.getFont().getFontData()[0]; |
| copyContent(parent.getContent()); |
| cacheLineData(printerContent); |
| } |
| /** |
| * Caches the bidi segments of the given line. |
| * </p> |
| * @param lineOffset offset of the line to cache bidi segments for. |
| * Relative to the start of the document. |
| * @param line line to cache bidi segments for. |
| */ |
| void cacheBidiSegments(int lineOffset, String line) { |
| int[] segments = parent.getBidiSegments(lineOffset, line); |
| |
| if (segments != null) { |
| bidiSegments.put(new Integer(lineOffset), segments); |
| } |
| } |
| /** |
| * Caches the line background color of the given line. |
| * </p> |
| * @param lineOffset offset of the line to cache the background |
| * color for. Relative to the start of the document. |
| * @param line line to cache the background color for |
| */ |
| void cacheLineBackground(int lineOffset, String line) { |
| StyledTextEvent event = parent.getLineBackgroundData(lineOffset, line); |
| |
| if (event != null) { |
| lineBackgrounds.put(new Integer(lineOffset), event); |
| } |
| } |
| /** |
| * 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(StyledTextContent printerContent) { |
| for (int i = 0; i < printerContent.getLineCount(); i++) { |
| int lineOffset = printerContent.getOffsetAtLine(i); |
| String line = printerContent.getLine(i); |
| |
| if (printOptions.printLineBackground) { |
| cacheLineBackground(lineOffset, line); |
| } |
| if (printOptions.printTextBackground || |
| printOptions.printTextForeground || |
| printOptions.printTextFontStyle) { |
| cacheLineStyle(lineOffset, line); |
| } |
| if (parent.isBidi()) { |
| cacheBidiSegments(lineOffset, line); |
| } |
| } |
| } |
| /** |
| * Caches all line styles of the given line. |
| * </p> |
| * @param lineOffset offset of the line to cache the styles for. |
| * Relative to the start of the document. |
| * @param line line to cache the styles for. |
| */ |
| void cacheLineStyle(int lineOffset, String line) { |
| StyledTextEvent event = parent.getLineStyleData(lineOffset, line); |
| |
| if (event != null) { |
| StyleRange[] styles = event.styles; |
| for (int i = 0; i < styles.length; i++) { |
| StyleRange styleCopy = null; |
| if (printOptions.printTextBackground == false && styles[i].background != null) { |
| styleCopy = (StyleRange) styles[i].clone(); |
| styleCopy.background = null; |
| } |
| if (printOptions.printTextForeground == false && styles[i].foreground != null) { |
| if (styleCopy == null) { |
| styleCopy = (StyleRange) styles[i].clone(); |
| } |
| styleCopy.foreground = null; |
| } |
| if (printOptions.printTextFontStyle == false && styles[i].fontStyle != SWT.NORMAL) { |
| if (styleCopy == null) { |
| styleCopy = (StyleRange) styles[i].clone(); |
| } |
| styleCopy.fontStyle = SWT.NORMAL; |
| } |
| if (styleCopy != null) { |
| styles[i] = styleCopy; |
| } |
| } |
| lineStyles.put(new Integer(lineOffset), event); |
| } |
| } |
| /** |
| * Copies the text of the specified <class>StyledTextContent</class>. |
| * </p> |
| * @param original the <class>StyledTextContent</class> to copy. |
| */ |
| void copyContent(StyledTextContent original) { |
| int insertOffset = 0; |
| |
| printerContent = new DefaultContent(); |
| 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; |
| } |
| } |
| /** |
| * Replaces all display colors in the cached line backgrounds and |
| * line styles with printer colors. |
| */ |
| void createPrinterColors() { |
| Enumeration values = lineBackgrounds.elements(); |
| printerColors = new Hashtable(); |
| while (values.hasMoreElements()) { |
| StyledTextEvent event = (StyledTextEvent) values.nextElement(); |
| event.lineBackground = getPrinterColor(event.lineBackground); |
| } |
| |
| values = lineStyles.elements(); |
| while (values.hasMoreElements()) { |
| StyledTextEvent event = (StyledTextEvent) values.nextElement(); |
| for (int i = 0; i < event.styles.length; i++) { |
| StyleRange style = event.styles[i]; |
| Color printerBackground = getPrinterColor(style.background); |
| Color printerForeground = getPrinterColor(style.foreground); |
| |
| if (printerBackground != style.background || |
| printerForeground != style.foreground) { |
| style = (StyleRange) style.clone(); |
| style.background = printerBackground; |
| style.foreground = printerForeground; |
| event.styles[i] = style; |
| } |
| } |
| } |
| } |
| /** |
| * Disposes of the resources and the <class>PrintRenderer</class>. |
| */ |
| void dispose() { |
| if (printerColors != null) { |
| Enumeration colors = printerColors.elements(); |
| |
| while (colors.hasMoreElements()) { |
| Color color = (Color) colors.nextElement(); |
| color.dispose(); |
| } |
| printerColors = null; |
| } |
| if (gc != null) { |
| gc.dispose(); |
| gc = null; |
| } |
| if (printerFont != null) { |
| printerFont.dispose(); |
| printerFont = null; |
| } |
| if (renderer != null) { |
| renderer.dispose(); |
| renderer = null; |
| } |
| } |
| /** |
| * Finish printing the indicated page. |
| * |
| * @param page page that was printed |
| */ |
| void endPage(int page) { |
| printDecoration(page, false); |
| printer.endPage(); |
| } |
| /** |
| * Creates a <class>PrintRenderer</class> and calculate the line range |
| * to print. |
| */ |
| void initializeRenderer() { |
| Rectangle trim = printer.computeTrim(0, 0, 0, 0); |
| Point dpi = printer.getDPI(); |
| |
| printerFont = new Font(printer, displayFontData.getName(), displayFontData.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); |
| |
| // make the orientation of the printer gc match the control |
| int style = mirrored ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT; |
| gc = new GC(printer, style); |
| gc.setFont(printerFont); |
| renderer = new PrintRenderer( |
| printer, printerFont, gc, printerContent, |
| lineBackgrounds, lineStyles, bidiSegments, |
| parent.tabLength, clientArea); |
| if (printOptions.header != null) { |
| int lineHeight = renderer.getLineHeight(); |
| clientArea.y += lineHeight * 2; |
| clientArea.height -= lineHeight * 2; |
| } |
| if (printOptions.footer != null) { |
| clientArea.height -= renderer.getLineHeight() * 2; |
| } |
| pageSize = clientArea.height / renderer.getLineHeight(); |
| StyledTextContent content = renderer.getContent(); |
| startLine = 0; |
| if (singleLine) { |
| endLine = 0; |
| } |
| else { |
| endLine = content.getLineCount() - 1; |
| } |
| PrinterData data = printer.getPrinterData(); |
| if (data.scope == PrinterData.PAGE_RANGE) { |
| 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; |
| } |
| } |
| } |
| /** |
| * Returns the printer color for the given display color. |
| * </p> |
| * @param color display color |
| * @return color create on the printer with the same RGB values |
| * as the display color. |
| */ |
| Color getPrinterColor(Color color) { |
| Color printerColor = null; |
| |
| if (color != null) { |
| printerColor = (Color) printerColors.get(color); |
| if (printerColor == null) { |
| printerColor = new Color(printer, color.getRGB()); |
| printerColors.put(color, printerColor); |
| } |
| } |
| return printerColor; |
| } |
| /** |
| * Prints the lines in the specified page range. |
| */ |
| void print() { |
| StyledTextContent content = renderer.getContent(); |
| Color background = gc.getBackground(); |
| Color foreground = gc.getForeground(); |
| int lineHeight = renderer.getLineHeight(); |
| int paintY = clientArea.y; |
| int page = startPage; |
| |
| for (int i = startLine; i <= endLine && page <= endPage; i++, paintY += lineHeight) { |
| String line = content.getLine(i); |
| |
| if (paintY == clientArea.y) { |
| startPage(page); |
| } |
| renderer.drawLine( |
| line, i, paintY, gc, background, foreground, true); |
| if (paintY + lineHeight * 2 > clientArea.y + clientArea.height) { |
| // close full page |
| endPage(page); |
| paintY = clientArea.y - lineHeight; |
| page++; |
| } |
| } |
| if (paintY > clientArea.y) { |
| // close partial page |
| endPage(page); |
| } |
| } |
| /** |
| * 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) { |
| int lastSegmentIndex = 0; |
| final int SegmentCount = 3; |
| String text; |
| |
| if (header) { |
| text = printOptions.header; |
| } |
| else { |
| text = printOptions.footer; |
| } |
| if (text == null) { |
| return; |
| } |
| 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) { |
| final 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) { |
| int segmentWidth; |
| int drawX = 0; |
| int drawY = 0; |
| TextLayout layout = new TextLayout(printer); |
| layout.setText(segment); |
| layout.setFont(printerFont); |
| segmentWidth = layout.getLineBounds(0).width; |
| if (header) { |
| drawY = clientArea.y - renderer.getLineHeight() * 2; |
| } |
| else { |
| drawY = clientArea.y + clientArea.height + renderer.getLineHeight(); |
| } |
| if (alignment == LEFT) { |
| drawX = clientArea.x; |
| } |
| else |
| if (alignment == CENTER) { |
| drawX = (pageWidth - segmentWidth) / 2; |
| } |
| else |
| if (alignment == RIGHT) { |
| drawX = clientArea.x + clientArea.width - segmentWidth; |
| } |
| layout.draw(gc, drawX, drawY); |
| layout.dispose(); |
| } |
| } |
| /** |
| * 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)) { |
| createPrinterColors(); |
| initializeRenderer(); |
| print(); |
| dispose(); |
| printer.endJob(); |
| } |
| } |
| /** |
| * Start printing a new page. |
| * |
| * @param page page number to be started |
| */ |
| void startPage(int page) { |
| printer.startPage(); |
| printDecoration(page, true); |
| } |
| } |
| /** |
| * 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 = new Vector(); |
| 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. |
| * <p> |
| * |
| * @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.addElement(getForeground()); |
| colorTable.addElement(getBackground()); |
| 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() == false) { |
| writeHeader(); |
| write("\n}}\0"); |
| super.close(); |
| } |
| } |
| /** |
| * Returns the index of the specified color in the RTF color table. |
| * <p> |
| * |
| * @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) { |
| int index; |
| |
| if (color == null) { |
| index = defaultIndex; |
| } |
| else { |
| index = colorTable.indexOf(color); |
| if (index == -1) { |
| index = colorTable.size(); |
| colorTable.addElement(color); |
| } |
| } |
| 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 |
| } |
| } |
| } |
| if (osName.startsWith(Win95) == false && |
| osName.startsWith(Win98) == false && |
| osName.startsWith(WinME) == false && |
| (osName.startsWith(WinNT) == false || majorVersion > 4)) { |
| WriteUnicode = true; |
| } |
| else { |
| WriteUnicode = false; |
| } |
| } |
| /** |
| * Appends the specified segment of "string" to the RTF data. |
| * Copy from <code>start</code> up to, but excluding, <code>end</code>. |
| * <p> |
| * |
| * @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(";}}\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. |
| * <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. |
| * @exception SWTException <ul> |
| * <li>ERROR_IO when the writer is closed.</li> |
| * </ul> |
| */ |
| public void writeLine(String line, int lineOffset) { |
| StyleRange[] styles = new StyleRange[0]; |
| Color lineBackground = null; |
| StyledTextEvent event; |
| |
| if (isClosed()) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| event = renderer.getLineStyleData(lineOffset, line); |
| if (event != null) { |
| styles = event.styles; |
| } |
| event = renderer.getLineBackgroundData(lineOffset, line); |
| if (event != null) { |
| lineBackground = event.lineBackground; |
| } |
| if (lineBackground == null) { |
| lineBackground = getBackground(); |
| } |
| writeStyledLine(line, lineOffset, styles, lineBackground); |
| } |
| /** |
| * Appends the specified line delmimiter to the RTF data. |
| * <p> |
| * |
| * @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. |
| * 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, StyleRange[] styles, Color lineBackground) { |
| int lineLength = line.length(); |
| int lineIndex; |
| int copyEnd; |
| int startOffset = getStart(); |
| int endOffset = startOffset + super.getCharCount(); |
| int lineEndOffset = Math.min(lineLength, endOffset - lineOffset); |
| int writeOffset = startOffset - lineOffset; |
| |
| if (writeOffset >= line.length()) { |
| return; // whole line is outside write range |
| } |
| else |
| if (writeOffset > 0) { |
| lineIndex = writeOffset; // line starts before RTF write start |
| } |
| else { |
| lineIndex = 0; |
| } |
| if (lineBackground != null) { |
| write("{\\highlight"); |
| write(getColorIndex(lineBackground, DEFAULT_BACKGROUND)); |
| write(" "); |
| } |
| for (int i = 0; i < styles.length; i++) { |
| StyleRange style = styles[i]; |
| int start = style.start - lineOffset; |
| int end = start + style.length; |
| int colorIndex; |
| // 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 |
| colorIndex = getColorIndex(style.background, DEFAULT_BACKGROUND); |
| write("{\\cf"); |
| write(getColorIndex(style.foreground, DEFAULT_FOREGROUND)); |
| if (colorIndex != DEFAULT_BACKGROUND) { |
| write("\\highlight"); |
| write(colorIndex); |
| } |
| 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 |
| copyEnd = Math.min(end, lineEndOffset); |
| // guard against invalid styles and let style processing continue |
| copyEnd = Math.max(copyEnd, lineIndex); |
| write(line, lineIndex, copyEnd); |
| 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. |
| */ |
| 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. |
| * <p> |
| * |
| * @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 == false) { |
| 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. |
| * 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. |
| * <p> |
| * |
| * @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) { |
| int lineLength = line.length(); |
| int lineIndex; |
| int copyEnd; |
| int writeOffset = startOffset - lineOffset; |
| |
| if (isClosed) { |
| SWT.error(SWT.ERROR_IO); |
| } |
| if (writeOffset >= lineLength) { |
| return; // whole line is outside write range |
| } |
| else |
| if (writeOffset > 0) { |
| lineIndex = writeOffset; // line starts before write start |
| } |
| else { |
| lineIndex = 0; |
| } |
| copyEnd = Math.min(lineLength, endOffset - lineOffset); |
| if (lineIndex < copyEnd) { |
| write(line.substring(lineIndex, copyEnd)); |
| } |
| } |
| /** |
| * Appends the specified line delmimiter to the data. |
| * <p> |
| * |
| * @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); |
| } |
| } |
| /** |
| * LineCache provides an interface to calculate and invalidate |
| * line based data. |
| * Implementors need to return a line width in <code>getWidth</code>. |
| */ |
| interface LineCache { |
| /** |
| * Calculates the lines in the specified range. |
| * <p> |
| * |
| * @param startLine first line to calculate |
| * @param lineCount number of lines to calculate |
| */ |
| public void calculate(int startLine, int lineCount); |
| /** |
| * Returns a width that will be used by the <code>StyledText</code> |
| * widget to size a horizontal scroll bar. |
| * <p> |
| * |
| * @return the line width |
| */ |
| public int getWidth(); |
| /** |
| * Resets the lines in the specified range. |
| * This method is called in <code>StyledText.redraw()</code> |
| * and allows implementors to call redraw themselves during reset. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=implementors should retain a |
| * valid width even if it is affected by the reset operation. |
| * false=the width may be set to 0 |
| */ |
| public void redrawReset(int startLine, int lineCount, boolean calculateMaxWidth); |
| /** |
| * Resets the lines in the specified range. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=implementors should retain a |
| * valid width even if it is affected by the reset operation. |
| * false=the width may be set to 0 |
| */ |
| public void reset(int startLine, int lineCount, boolean calculateMaxWidth); |
| /** |
| * Called when a text change occurred. |
| * <p> |
| * |
| * @param startOffset the start offset of the text change |
| * @param newLineCount the number of inserted lines |
| * @param replaceLineCount the number of deleted lines |
| * @param newCharCount the number of new characters |
| * @param replaceCharCount the number of deleted characters |
| */ |
| public void textChanged(int startOffset, int newLineCount, int replaceLineCount, int newCharCount, int replaceCharCount); |
| } |
| /** |
| * Keeps track of line widths and the longest line in the |
| * StyledText document. |
| * Line widths are calculated when requested by a call to |
| * <code>calculate</code> and cached until reset by a call |
| * to <code>redrawReset</code> or <code>reset</code>. |
| */ |
| class ContentWidthCache implements LineCache { |
| StyledText parent; // parent widget, used to create a GC for line measuring |
| int[] lineWidth; // width in pixel of each line in the document, -1 for unknown width |
| StyledTextContent content; // content to use for line width calculation |
| int lineCount; // number of lines in lineWidth array |
| int maxWidth; // maximum line width of all measured lines |
| int maxWidthLineIndex; // index of the widest line |
| |
| /** |
| * Creates a new <code>ContentWidthCache</code> and allocates space |
| * for the given number of lines. |
| * <p> |
| * |
| * @param parent the StyledText widget used to create a GC for |
| * line measuring |
| * @param content a StyledTextContent containing the initial number |
| * of lines to allocate space for |
| */ |
| public ContentWidthCache(StyledText parent, StyledTextContent content) { |
| this.parent = parent; |
| this.content = content; |
| this.lineCount = content.getLineCount(); |
| lineWidth = new int[lineCount]; |
| reset(0, lineCount, false); |
| } |
| /** |
| * Calculates the width of each line in the given range if it has |
| * not been calculated yet. |
| * If any line in the given range is wider than the currently widest |
| * line, the maximum line width is updated, |
| * <p> |
| * |
| * @param startLine first line to calculate the line width of |
| * @param lineCount number of lines to calculate the line width for |
| */ |
| public void calculate(int startLine, int lineCount) { |
| int caretWidth = 0; |
| int endLine = startLine + lineCount; |
| |
| if (startLine < 0 || endLine > lineWidth.length) { |
| return; |
| } |
| caretWidth = getCaretWidth(); |
| for (int i = startLine; i < endLine; i++) { |
| if (lineWidth[i] == -1) { |
| String line = content.getLine(i); |
| int lineOffset = content.getOffsetAtLine(i); |
| lineWidth[i] = contentWidth(line, lineOffset) + caretWidth; |
| } |
| if (lineWidth[i] > maxWidth) { |
| maxWidth = lineWidth[i]; |
| maxWidthLineIndex = i; |
| } |
| } |
| } |
| /** |
| * Calculates the width of the visible lines in the specified |
| * range. |
| * <p> |
| * |
| * @param startLine the first changed line |
| * @param newLineCount the number of inserted lines |
| */ |
| void calculateVisible(int startLine, int newLineCount) { |
| int topIndex = parent.getTopIndex(); |
| int bottomLine = Math.min(getPartialBottomIndex(), startLine + newLineCount); |
| |
| startLine = Math.max(startLine, topIndex); |
| calculate(startLine, bottomLine - startLine + 1); |
| } |
| /** |
| * Measures the width of the given line. |
| * <p> |
| * |
| * @param line the line to measure |
| * @param lineOffset start offset of the line to measure, relative |
| * to the start of the document |
| * @return the width of the given line |
| */ |
| int contentWidth(String line, int lineOffset) { |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| Rectangle rect = layout.getLineBounds(0); |
| renderer.disposeTextLayout(layout); |
| return rect.x + rect.width + leftMargin + rightMargin; |
| } |
| /** |
| * Grows the <code>lineWidth</code> array to accomodate new line width |
| * information. |
| * <p> |
| * |
| * @param numLines the number of elements to increase the array by |
| */ |
| void expandLines(int numLines) { |
| int size = lineWidth.length; |
| if (size - lineCount >= numLines) { |
| return; |
| } |
| int[] newLines = new int[Math.max(size * 2, size + numLines)]; |
| System.arraycopy(lineWidth, 0, newLines, 0, size); |
| lineWidth = newLines; |
| reset(size, lineWidth.length - size, false); |
| } |
| /** |
| * Returns the width of the longest measured line. |
| * <p> |
| * |
| * @return the width of the longest measured line. |
| */ |
| public int getWidth() { |
| return maxWidth; |
| } |
| /** |
| * Updates the line width array to reflect inserted or deleted lines. |
| * <p> |
| * |
| * @param startLine the starting line of the change that took place |
| * @param delta the number of lines in the change, > 0 indicates lines inserted, |
| * < 0 indicates lines deleted |
| */ |
| void linesChanged(int startLine, int delta) { |
| boolean inserting = delta > 0; |
| |
| if (delta == 0) { |
| return; |
| } |
| if (inserting) { |
| // shift the lines down to make room for new lines |
| expandLines(delta); |
| for (int i = lineCount - 1; i >= startLine; i--) { |
| lineWidth[i + delta] = lineWidth[i]; |
| } |
| // reset the new lines |
| for (int i = startLine + 1; i <= startLine + delta && i < lineWidth.length; i++) { |
| lineWidth[i] = -1; |
| } |
| // have new lines been inserted above the longest line? |
| if (maxWidthLineIndex >= startLine) { |
| maxWidthLineIndex += delta; |
| } |
| } |
| else { |
| // shift up the lines |
| for (int i = startLine - delta; i < lineCount; i++) { |
| lineWidth[i+delta] = lineWidth[i]; |
| } |
| // has the longest line been removed? |
| if (maxWidthLineIndex > startLine && maxWidthLineIndex <= startLine - delta) { |
| maxWidth = 0; |
| maxWidthLineIndex = -1; |
| } |
| else |
| if (maxWidthLineIndex >= startLine - delta) { |
| maxWidthLineIndex += delta; |
| } |
| } |
| lineCount += delta; |
| } |
| /** |
| * Resets the line width of the lines in the specified range. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=if the widest line is being |
| * reset the maximum width of all remaining cached lines is |
| * calculated. false=the maximum width is set to 0 if the |
| * widest line is being reset. |
| */ |
| public void redrawReset(int startLine, int lineCount, boolean calculateMaxWidth) { |
| reset(startLine, lineCount, calculateMaxWidth); |
| } |
| /** |
| * Resets the line width of the lines in the specified range. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=if the widest line is being |
| * reset the maximum width of all remaining cached lines is |
| * calculated. false=the maximum width is set to 0 if the |
| * widest line is being reset. |
| */ |
| public void reset(int startLine, int lineCount, boolean calculateMaxWidth) { |
| int endLine = startLine + lineCount; |
| |
| if (startLine < 0 || endLine > lineWidth.length) { |
| return; |
| } |
| for (int i = startLine; i < endLine; i++) { |
| lineWidth[i] = -1; |
| } |
| // if the longest line is one of the reset lines, the maximum line |
| // width is no longer valid |
| if (maxWidthLineIndex >= startLine && maxWidthLineIndex < endLine) { |
| maxWidth = 0; |
| maxWidthLineIndex = -1; |
| if (calculateMaxWidth) { |
| for (int i = 0; i < lineCount; i++) { |
| if (lineWidth[i] > maxWidth) { |
| maxWidth = lineWidth[i]; |
| maxWidthLineIndex = i; |
| } |
| } |
| } |
| } |
| } |
| /** |
| * Updates the line width array to reflect a text change. |
| * Lines affected by the text change will be reset. |
| * <p> |
| * |
| * @param startOffset the start offset of the text change |
| * @param newLineCount the number of inserted lines |
| * @param replaceLineCount the number of deleted lines |
| * @param newCharCount the number of new characters |
| * @param replaceCharCount the number of deleted characters |
| */ |
| public void textChanged(int startOffset, int newLineCount, int replaceLineCount, int newCharCount, int replaceCharCount) { |
| int startLine = parent.getLineAtOffset(startOffset); |
| boolean removedMaxLine = (maxWidthLineIndex > startLine && maxWidthLineIndex <= startLine + replaceLineCount); |
| // entire text deleted? |
| if (startLine == 0 && replaceLineCount == lineCount) { |
| lineCount = newLineCount; |
| lineWidth = new int[lineCount]; |
| reset(0, lineCount, false); |
| maxWidth = 0; |
| } |
| else { |
| linesChanged(startLine, -replaceLineCount); |
| linesChanged(startLine, newLineCount); |
| lineWidth[startLine] = -1; |
| } |
| // only calculate the visible lines. otherwise measurements of changed lines |
| // outside the visible area may subsequently change again without the |
| // lines ever being visible. |
| calculateVisible(startLine, newLineCount); |
| // maxWidthLineIndex will be -1 (i.e., unknown line width) if the widget has |
| // not been visible yet and the changed lines have therefore not been |
| // calculated above. |
| if (removedMaxLine || |
| (maxWidthLineIndex != -1 && lineWidth[maxWidthLineIndex] < maxWidth)) { |
| // longest line has been removed or changed and is now shorter. |
| // need to recalculate maximum content width for all lines |
| maxWidth = 0; |
| for (int i = 0; i < lineCount; i++) { |
| if (lineWidth[i] > maxWidth) { |
| maxWidth = lineWidth[i]; |
| maxWidthLineIndex = i; |
| } |
| } |
| } |
| } |
| } |
| /** |
| * Updates the line wrapping of the content. |
| * The line wrapping must always be in a consistent state. |
| * Therefore, when <code>reset</code> or <code>redrawReset</code> |
| * is called, the line wrapping is recalculated immediately |
| * instead of in <code>calculate</code>. |
| */ |
| class WordWrapCache implements LineCache { |
| StyledText parent; |
| WrappedContent visualContent; |
| |
| /** |
| * Creates a new <code>WordWrapCache</code> and calculates an initial |
| * line wrapping. |
| * <p> |
| * |
| * @param parent the StyledText widget to wrap content in. |
| * @param content the content provider that does the actual line wrapping. |
| */ |
| public WordWrapCache(StyledText parent, WrappedContent content) { |
| this.parent = parent; |
| visualContent = content; |
| visualContent.wrapLines(); |
| } |
| /** |
| * Do nothing. Lines are wrapped immediately after reset. |
| * <p> |
| * |
| * @param startLine first line to calculate |
| * @param lineCount number of lines to calculate |
| */ |
| public void calculate(int startLine, int lineCount) { |
| } |
| /** |
| * Returns the client area width. Lines are wrapped so there |
| * is no horizontal scroll bar. |
| * <p> |
| * |
| * @return the line width |
| */ |
| public int getWidth() { |
| return parent.getClientArea().width; |
| } |
| /** |
| * Wraps the lines in the specified range. |
| * This method is called in <code>StyledText.redraw()</code>. |
| * A redraw is therefore not necessary. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=implementors should retain a |
| * valid width even if it is affected by the reset operation. |
| * false=the width may be set to 0 |
| */ |
| public void redrawReset(int startLine, int lineCount, boolean calculateMaxWidth) { |
| if (lineCount == visualContent.getLineCount()) { |
| // do a full rewrap if all lines are reset |
| visualContent.wrapLines(); |
| } |
| else { |
| visualContent.reset(startLine, lineCount); |
| } |
| } |
| /** |
| * Rewraps the lines in the specified range and redraws |
| * the widget if the line wrapping has changed. |
| * <p> |
| * |
| * @param startLine the first line to reset |
| * @param lineCount the number of lines to reset |
| * @param calculateMaxWidth true=implementors should retain a |
| * valid width even if it is affected by the reset operation. |
| * false=the width may be set to 0 |
| */ |
| public void reset(int startLine, int lineCount, boolean calculateMaxWidth) { |
| int itemCount = getPartialBottomIndex() - topIndex + 1; |
| int[] oldLineOffsets = new int[itemCount]; |
| |
| for (int i = 0; i < itemCount; i++) { |
| oldLineOffsets[i] = visualContent.getOffsetAtLine(i + topIndex); |
| } |
| redrawReset(startLine, lineCount, calculateMaxWidth); |
| // check for cases which will require a full redraw |
| if (getPartialBottomIndex() - topIndex + 1 != itemCount) { |
| // number of visible lines has changed |
| parent.internalRedraw(); |
| } |
| else { |
| for (int i = 0; i < itemCount; i++) { |
| if (visualContent.getOffsetAtLine(i + topIndex) != oldLineOffsets[i]) { |
| // wrapping of one of the visible lines has changed |
| parent.internalRedraw(); |
| break; |
| } |
| } |
| } |
| } |
| /** |
| * Passes the text change notification to the line wrap content. |
| * <p> |
| * |
| * @param startOffset the start offset of the text change |
| * @param newLineCount the number of inserted lines |
| * @param replaceLineCount the number of deleted lines |
| * @param newCharCount the number of new characters |
| * @param replaceCharCount the number of deleted characters |
| */ |
| public void textChanged(int startOffset, int newLineCount, int replaceLineCount, int newCharCount, int replaceCharCount) { |
| int startLine = visualContent.getLineAtOffset(startOffset); |
| visualContent.textChanged(startOffset, newLineCount, replaceLineCount, newCharCount, replaceCharCount); |
| |
| // if we are wrapping then it is possible for a deletion on the last |
| // line of text to shorten the total text length by a line. If this |
| // occurs then the startIndex must be adjusted such that a redraw will |
| // be performed if a visible region is affected. fixes bug 42947. |
| if (wordWrap) { |
| int lineCount = content.getLineCount(); |
| if (startLine >= lineCount) startLine = lineCount - 1; |
| } |
| if (startLine <= getPartialBottomIndex()) { |
| // only redraw if the text change affects text inside or above |
| // the visible lines. if it is below the visible lines it will |
| // not affect the word wrapping. fixes bug 14047. |
| parent.internalRedraw(); |
| } |
| } |
| } |
| |
| /** |
| * 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 | SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND)); |
| // set the bg/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()); |
| super.setBackground(getBackground()); |
| Display display = getDisplay(); |
| isMirrored = (super.getStyle() & SWT.MIRRORED) != 0; |
| 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; |
| } |
| clipboard = new Clipboard(display); |
| installDefaultContent(); |
| initializeRenderer(); |
| if ((style & SWT.WRAP) != 0) { |
| setWordWrap(true); |
| } |
| else { |
| lineCache = new ContentWidthCache(this, content); |
| } |
| defaultCaret = new Caret(this, SWT.NULL); |
| 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; |
| int lineIndex = getCaretLine(); |
| String line = content.getLine(lineIndex); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| int offsetInLine = caretOffset - lineOffset; |
| int newCaretX = getXAtOffset(line, lineIndex, offsetInLine); |
| setCaretLocation(newCaretX, getCaretLine(), direction); |
| } |
| }; |
| BidiUtil.addLanguageListener(handle, runnable); |
| } |
| setCaret(defaultCaret); |
| calculateScrollBars(); |
| createKeyBindings(); |
| ibeamCursor = new Cursor(display, SWT.CURSOR_IBEAM); |
| setCursor(ibeamCursor); |
| installListeners(); |
| installDefaultLineStyler(); |
| initializeAccessible(); |
| } |
| /** |
| * Adds an extended modify listener. An ExtendedModify event is sent by the |
| * widget when the widget text has changed. |
| * <p> |
| * |
| * @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); |
| } |
| /** |
| * Maps a key to an action. |
| * 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 keyValue = key & SWT.KEY_MASK; |
| int modifierValue = key & SWT.MODIFIER_MASK; |
| char keyChar = (char)keyValue; |
| |
| 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)); |
| } |
| } |
| |
| } |
| /** |
| * Adds a bidirectional segment listener. 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); |
| } |
| StyledTextListener typedListener = new StyledTextListener(listener); |
| addListener(LineGetSegments, typedListener); |
| } |
| /** |
| * Adds a line background listener. A LineGetBackground event is sent by the |
| * widget to determine the background color for a line. |
| * <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 addLineBackgroundListener(LineBackgroundListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (userLineBackground == false) { |
| removeLineBackgroundListener(defaultLineStyler); |
| defaultLineStyler.setLineBackground(0, logicalContent.getLineCount(), null); |
| userLineBackground = true; |
| } |
| StyledTextListener typedListener = new StyledTextListener(listener); |
| addListener(LineGetBackground, typedListener); |
| } |
| /** |
| * Adds a line style listener. A LineGetStyle event is sent by the widget to |
| * determine the styles for a line. |
| * <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 addLineStyleListener(LineStyleListener listener) { |
| checkWidget(); |
| if (listener == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| if (userLineStyle == false) { |
| removeLineStyleListener(defaultLineStyler); |
| defaultLineStyler.setStyleRange(null); |
| userLineStyle = true; |
| } |
| StyledTextListener typedListener = new StyledTextListener(listener); |
| addListener(LineGetStyle, typedListener); |
| } |
| /** |
| * Adds a modify listener. A Modify event is sent by the widget when the widget text |
| * has changed. |
| * <p> |
| * |
| * @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); |
| } |
| TypedListener typedListener = new TypedListener(modifyListener); |
| addListener(SWT.Modify, typedListener); |
| } |
| /** |
| * 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 amd 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); |
| } |
| TypedListener typedListener = new TypedListener(listener); |
| addListener(SWT.Selection, typedListener); |
| } |
| /** |
| * 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. |
| * <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 addVerifyKeyListener(VerifyKeyListener listener) { |
| checkWidget(); |
| if (listener == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| StyledTextListener typedListener = new StyledTextListener(listener); |
| addListener(VerifyKey, typedListener); |
| } |
| /** |
| * 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. |
| * <p> |
| * |
| * @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); |
| } |
| TypedListener typedListener = new TypedListener(verifyListener); |
| addListener(SWT.Verify, typedListener); |
| } |
| /** |
| * Appends a string to the text at the end of the widget. |
| * <p> |
| * |
| * @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 width of the widest visible line. |
| */ |
| void calculateContentWidth() { |
| lineCache = getLineCache(content); |
| lineCache.calculate(topIndex, getPartialBottomIndex() - topIndex + 1); |
| } |
| /** |
| * Calculates the scroll bars |
| */ |
| void calculateScrollBars() { |
| ScrollBar horizontalBar = getHorizontalBar(); |
| ScrollBar verticalBar = getVerticalBar(); |
| |
| setScrollBars(); |
| 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 oldTopIndex = topIndex; |
| int verticalIncrement = getVerticalIncrement(); |
| int clientAreaHeight = getClientArea().height; |
| |
| if (verticalIncrement == 0) { |
| return; |
| } |
| topIndex = Compatibility.ceil(verticalScrollOffset, 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 = verticalScrollOffset + 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; |
| } |
| } |
| if (topIndex != oldTopIndex) { |
| topOffset = content.getOffsetAtLine(topIndex); |
| lineCache.calculate(topIndex, getPartialBottomIndex() - topIndex + 1); |
| setHorizontalScrollBar(); |
| } |
| } |
| /** |
| * 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; |
| } |
| } |
| return style; |
| } |
| /** |
| * Scrolls down the text to use new space made available by a resize or by |
| * deleted lines. |
| */ |
| void claimBottomFreeSpace() { |
| int newVerticalOffset = Math.max(0, content.getLineCount() * lineHeight - getClientArea().height); |
| |
| if (newVerticalOffset < verticalScrollOffset) { |
| // Scroll up so that empty lines below last text line are used. |
| // Fixes 1GEYJM0 |
| setVerticalScrollOffset(newVerticalOffset, true); |
| } |
| } |
| /** |
| * Scrolls text to the right to use new space made available by a resize. |
| */ |
| void claimRightFreeSpace() { |
| int newHorizontalOffset = Math.max(0, lineCache.getWidth() - (getClientArea().width - 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). |
| scrollHorizontalBar(newHorizontalOffset - horizontalScrollOffset); |
| } |
| } |
| /** |
| * Clears the widget margin. |
| * |
| * @param gc GC to render on |
| * @param background background color to use for clearing the margin |
| * @param clientArea widget client area dimensions |
| */ |
| void clearMargin(GC gc, Color background, Rectangle clientArea, int y) { |
| // clear the margin background |
| gc.setBackground(background); |
| if (topMargin > 0) { |
| gc.fillRectangle(0, -y, clientArea.width, topMargin); |
| } |
| if (bottomMargin > 0) { |
| gc.fillRectangle(0, clientArea.height - bottomMargin - y, clientArea.width, bottomMargin); |
| } |
| if (leftMargin > 0) { |
| gc.fillRectangle(0, -y, leftMargin, clientArea.height); |
| } |
| if (rightMargin > 0) { |
| gc.fillRectangle(clientArea.width - rightMargin, -y, rightMargin, clientArea.height); |
| } |
| } |
| /** |
| * Removes the widget selection. |
| * <p> |
| * |
| * @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; |
| int length = content.getCharCount(); |
| |
| resetSelection(); |
| // redraw old selection, if any |
| if (selectionEnd - selectionStart > 0) { |
| // 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, true); |
| } |
| if (sendEvent == true) { |
| sendSelectionEvent(); |
| } |
| } |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| int count, width, height; |
| boolean singleLine = (getStyle() & SWT.SINGLE) != 0; |
| |
| if (singleLine) { |
| count = 1; |
| } else { |
| count = content.getLineCount(); |
| } |
| if (wHint != SWT.DEFAULT) { |
| width = wHint; |
| } |
| else { |
| width = DEFAULT_WIDTH; |
| } |
| if (wHint == SWT.DEFAULT) { |
| LineCache computeLineCache = lineCache; |
| if (wordWrap) { |
| // set non-wrapping content width calculator. Ensures ideal line width |
| // that does not required wrapping. Fixes bug 31195. |
| computeLineCache = new ContentWidthCache(this, logicalContent); |
| if (singleLine == false) { |
| count = logicalContent.getLineCount(); |
| } |
| } |
| // Only calculate what can actually be displayed. |
| // Do this because measuring each text line is a |
| // time-consuming process. |
| int visibleCount = Math.min (count, getDisplay().getBounds().height / lineHeight); |
| computeLineCache.calculate(0, visibleCount); |
| width = computeLineCache.getWidth() + leftMargin + rightMargin; |
| } |
| else |
| if (wordWrap && singleLine == false) { |
| // calculate to wrap to width hint. Fixes bug 20377. |
| // don't wrap live content. Fixes bug 38344. |
| WrappedContent wrappedContent = new WrappedContent(renderer, logicalContent); |
| wrappedContent.wrapLines(width); |
| count = wrappedContent.getLineCount(); |
| } |
| if (hHint != SWT.DEFAULT) { |
| height = hHint; |
| } |
| else { |
| height = count * lineHeight + topMargin + bottomMargin; |
| } |
| // Use default values if no text is defined. |
| if (width == 0) { |
| width = DEFAULT_WIDTH; |
| } |
| if (height == 0) { |
| if (singleLine) { |
| height = lineHeight; |
| } |
| else { |
| height = DEFAULT_HEIGHT; |
| } |
| } |
| Rectangle rect = computeTrim(0, 0, width, height); |
| return new Point (rect.width, rect.height); |
| } |
| /** |
| * Copies the selected text to the <code>DND.CLIPBOARD</code> clipboard. |
| * 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 a string that uses only the line delimiter specified by the |
| * StyledTextContent implementation. |
| * 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) { |
| StringBuffer convertedText; |
| String delimiter = getLineDelimiter(); |
| int length = text.length(); |
| int crIndex = 0; |
| int lfIndex = 0; |
| int i = 0; |
| |
| if (length == 0) { |
| return text; |
| } |
| convertedText = new StringBuffer(length); |
| 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 // CR occurs before LF or no LF present? |
| 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() == false || convertedText.length() == 0)) { |
| convertedText.append(text.substring(i)); |
| } |
| return convertedText.toString(); |
| } |
| /** |
| * Creates default key bindings. |
| */ |
| void createKeyBindings() { |
| // Navigation |
| setKeyBinding(SWT.ARROW_UP, ST.LINE_UP); |
| setKeyBinding(SWT.ARROW_DOWN, ST.LINE_DOWN); |
| setKeyBinding(SWT.HOME, ST.LINE_START); |
| setKeyBinding(SWT.END, ST.LINE_END); |
| setKeyBinding(SWT.PAGE_UP, ST.PAGE_UP); |
| setKeyBinding(SWT.PAGE_DOWN, ST.PAGE_DOWN); |
| setKeyBinding(SWT.HOME | SWT.MOD1, ST.TEXT_START); |
| setKeyBinding(SWT.END | SWT.MOD1, ST.TEXT_END); |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD1, ST.WINDOW_START); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD1, ST.WINDOW_END); |
| if (isMirrored()) { |
| setKeyBinding(SWT.ARROW_LEFT, ST.COLUMN_NEXT); |
| setKeyBinding(SWT.ARROW_RIGHT, ST.COLUMN_PREVIOUS); |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD1, ST.WORD_NEXT); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD1, ST.WORD_PREVIOUS); |
| } |
| else { |
| setKeyBinding(SWT.ARROW_LEFT, ST.COLUMN_PREVIOUS); |
| setKeyBinding(SWT.ARROW_RIGHT, ST.COLUMN_NEXT); |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD1, ST.WORD_PREVIOUS); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD1, ST.WORD_NEXT); |
| } |
| |
| // Selection |
| setKeyBinding(SWT.ARROW_UP | SWT.MOD2, ST.SELECT_LINE_UP); |
| setKeyBinding(SWT.ARROW_DOWN | SWT.MOD2, ST.SELECT_LINE_DOWN); |
| setKeyBinding(SWT.HOME | SWT.MOD2, ST.SELECT_LINE_START); |
| setKeyBinding(SWT.END | SWT.MOD2, ST.SELECT_LINE_END); |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD2, ST.SELECT_PAGE_UP); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD2, ST.SELECT_PAGE_DOWN); |
| setKeyBinding(SWT.HOME | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_START); |
| setKeyBinding(SWT.END | SWT.MOD1 | SWT.MOD2, ST.SELECT_TEXT_END); |
| setKeyBinding(SWT.PAGE_UP | SWT.MOD1 | SWT.MOD2, ST.SELECT_WINDOW_START); |
| setKeyBinding(SWT.PAGE_DOWN | SWT.MOD1 | SWT.MOD2, ST.SELECT_WINDOW_END); |
| if (isMirrored()) { |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD2, ST.SELECT_COLUMN_NEXT); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD2, ST.SELECT_COLUMN_PREVIOUS); |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_NEXT); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_PREVIOUS); |
| } |
| else { |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD2, ST.SELECT_COLUMN_PREVIOUS); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD2, ST.SELECT_COLUMN_NEXT); |
| setKeyBinding(SWT.ARROW_LEFT | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_PREVIOUS); |
| setKeyBinding(SWT.ARROW_RIGHT | SWT.MOD1 | SWT.MOD2, ST.SELECT_WORD_NEXT); |
| } |
| |
| // Modification |
| // Cut, Copy, Paste |
| setKeyBinding('X' | SWT.MOD1, ST.CUT); |
| setKeyBinding('C' | SWT.MOD1, ST.COPY); |
| setKeyBinding('V' | SWT.MOD1, ST.PASTE); |
| // 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(); |
| } |
| 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. |
| * <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 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(); |
| } |
| } |
| /** |
| * 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) { |
| Rectangle area = getClientArea(); |
| |
| if (event.y > area.height) { |
| doAutoScroll(SWT.DOWN, event.y - area.height); |
| } |
| else |
| if (event.y < 0) { |
| doAutoScroll(SWT.UP, -event.y); |
| } |
| else |
| if (event.x < leftMargin && wordWrap == false) { |
| doAutoScroll(ST.COLUMN_PREVIOUS, leftMargin - event.x); |
| } |
| else |
| if (event.x > area.width - leftMargin - rightMargin && wordWrap == false) { |
| doAutoScroll(ST.COLUMN_NEXT, event.x - (area.width - leftMargin - rightMargin)); |
| } |
| else { |
| endAutoScroll(); |
| } |
| } |
| /** |
| * Initiates autoscrolling. |
| * <p> |
| * |
| * @param direction SWT.UP, SWT.DOWN, SWT.COLUMN_NEXT, SWT.COLUMN_PREVIOUS |
| */ |
| void doAutoScroll(int direction, int distance) { |
| Runnable timer = null; |
| final int TIMER_INTERVAL = 50; |
| |
| autoScrollDistance = distance; |
| |
| // If we're already autoscrolling in the given direction do nothing |
| if (autoScrollDirection == direction) { |
| return; |
| } |
| |
| 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) { |
| int lines = (autoScrollDistance / getLineHeight()) + 1; |
| doSelectionPageUp(lines); |
| display.timerExec(TIMER_INTERVAL, this); |
| } |
| } |
| }; |
| } else if (direction == SWT.DOWN) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == SWT.DOWN) { |
| int lines = (autoScrollDistance / getLineHeight()) + 1; |
| doSelectionPageDown(lines); |
| display.timerExec(TIMER_INTERVAL, this); |
| } |
| } |
| }; |
| } else if (direction == ST.COLUMN_NEXT) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == ST.COLUMN_NEXT) { |
| doVisualNext(); |
| setMouseWordSelectionAnchor(); |
| doMouseSelection(); |
| display.timerExec(TIMER_INTERVAL, this); |
| } |
| } |
| }; |
| } else if (direction == ST.COLUMN_PREVIOUS) { |
| timer = new Runnable() { |
| public void run() { |
| if (autoScrollDirection == ST.COLUMN_PREVIOUS) { |
| doVisualPrevious(); |
| setMouseWordSelectionAnchor(); |
| doMouseSelection(); |
| display.timerExec(TIMER_INTERVAL, this); |
| } |
| } |
| }; |
| } |
| if (timer != null) { |
| autoScrollDirection = direction; |
| display.timerExec(TIMER_INTERVAL, 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 line = content.getLineAtOffset(caretOffset); |
| int lineOffset = content.getOffsetAtLine(line); |
| |
| if (caretOffset == lineOffset) { |
| lineOffset = content.getOffsetAtLine(line - 1); |
| event.start = lineOffset + content.getLine(line - 1).length(); |
| event.end = caretOffset; |
| } |
| else { |
| String lineText = content.getLine(line); |
| TextLayout layout = renderer.getTextLayout(lineText, lineOffset); |
| 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. |
| * 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) { |
| Event event; |
| |
| if (textLimit > 0 && |
| content.getCharCount() - (selection.y - selection.x) >= textLimit) { |
| return; |
| } |
| 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() == false) { |
| event.text = getLineDelimiter(); |
| } |
| } |
| // no selection and overwrite mode is on and the typed key is not a |
| // tab character (tabs are always inserted without overwriting)? |
| else |
| if (selection.x == selection.y && overwrite == true && key != TAB) { |
| 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. |
| * <p> |
| * |
| * @see #doSelectionCursorPrevious |
| */ |
| void doCursorPrevious() { |
| advancing = false; |
| if (selection.y - selection.x > 0) { |
| int caretLine; |
| |
| caretOffset = selection.x; |
| caretLine = getCaretLine(); |
| showCaret(caretLine); |
| } |
| 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. |
| * <p> |
| * |
| * @see #doSelectionCursorNext |
| */ |
| void doCursorNext() { |
| advancing = true; |
| if (selection.y - selection.x > 0) { |
| int caretLine; |
| |
| caretOffset = selection.y; |
| caretLine = getCaretLine(); |
| showCaret(caretLine); |
| } |
| 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 |
| */ |
| int doLineDown() { |
| if (isSingleLine()) { |
| return 0; |
| } |
| // allow line down action only if receiver is not in single line mode. |
| // fixes 4820. |
| int caretLine = getCaretLine(); |
| if (caretLine < content.getLineCount() - 1) { |
| caretLine++; |
| caretOffset = getOffsetAtMouseLocation(columnX, caretLine); |
| } |
| return caretLine; |
| } |
| /** |
| * Moves the caret to the end of the line. |
| */ |
| void doLineEnd() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| int lineLength = content.getLine(caretLine).length(); |
| int lineEndOffset = lineOffset + lineLength; |
| |
| if (caretOffset < lineEndOffset) { |
| caretOffset = lineEndOffset; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the beginning of the line. |
| */ |
| void doLineStart() { |
| int caretLine = getCaretLine(); |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| if (caretOffset > lineOffset) { |
| caretOffset = lineOffset; |
| showCaret(caretLine); |
| } |
| } |
| /** |
| * 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 |
| */ |
| int doLineUp() { |
| int caretLine = getCaretLine(); |
| if (caretLine > 0) { |
| caretLine--; |
| caretOffset = getOffsetAtMouseLocation(columnX, caretLine); |
| } |
| return caretLine; |
| } |
| /** |
| * Moves the caret to the specified location. |
| * <p> |
| * |
| * @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 = (y + verticalScrollOffset) / lineHeight; |
| int lineCount = content.getLineCount(); |
| int newCaretOffset; |
| int newCaretLine; |
| boolean oldAdvancing = advancing; |
| |
| updateCaretDirection = true; |
| if (line > lineCount - 1) { |
| line = lineCount - 1; |
| } |
| // 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; |
| } |
| newCaretOffset = getOffsetAtMouseLocation(x, line); |
| |
| if (mouseDoubleClick) { |
| // double click word select the previous/next word. fixes bug 15610 |
| newCaretOffset = doMouseWordSelect(x, newCaretOffset, line); |
| } |
| 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 (y >= 0 && y < getClientArea().height && |
| (x >= 0 && x < getClientArea().width || wordWrap || |
| newCaretLine != content.getLineAtOffset(caretOffset))) { |
| if (newCaretOffset != caretOffset || advancing != oldAdvancing) { |
| caretOffset = newCaretOffset; |
| if (select) { |
| doMouseSelection(); |
| } |
| showCaret(); |
| } |
| } |
| if (select == false) { |
| 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) { |
| int wordOffset; |
| |
| // 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 (x >= 0 && x < getClientArea().width) { |
| // 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. |
| * 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 lines) { |
| int lineCount = content.getLineCount(); |
| int oldColumnX = columnX; |
| int oldHScrollOffset = horizontalScrollOffset; |
| int caretLine; |
| |
| // do nothing if in single line mode. fixes 5673 |
| if (isSingleLine()) { |
| return; |
| } |
| caretLine = getCaretLine(); |
| if (caretLine < lineCount - 1) { |
| int verticalMaximum = lineCount * getVerticalIncrement(); |
| int pageSize = getClientArea().height; |
| int scrollLines = Math.min(lineCount - caretLine - 1, lines); |
| int scrollOffset; |
| |
| // ensure that scrollLines never gets negative and at leat one |
| // line is scrolled. fixes bug 5602. |
| scrollLines = Math.max(1, scrollLines); |
| caretLine += scrollLines; |
| caretOffset = getOffsetAtMouseLocation(columnX, caretLine); |
| if (select) { |
| doSelection(ST.COLUMN_NEXT); |
| } |
| // scroll one page down or to the bottom |
| scrollOffset = verticalScrollOffset + scrollLines * getVerticalIncrement(); |
| if (scrollOffset + pageSize > verticalMaximum) { |
| scrollOffset = verticalMaximum - pageSize; |
| } |
| if (scrollOffset > verticalScrollOffset) { |
| setVerticalScrollOffset(scrollOffset, true); |
| } |
| } |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| // restore the original horizontal caret position |
| 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 line = getBottomIndex(); |
| int bottomCaretOffset = content.getOffsetAtLine(line) + content.getLine(line).length(); |
| |
| if (caretOffset < bottomCaretOffset) { |
| caretOffset = bottomCaretOffset; |
| showCaret(); |
| } |
| } |
| } |
| /** |
| * Moves the cursor to the beginning of the first fully visible line. |
| */ |
| void doPageStart() { |
| int topCaretOffset = content.getOffsetAtLine(topIndex); |
| |
| if (caretOffset > topCaretOffset) { |
| caretOffset = topCaretOffset; |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(topIndex); |
| } |
| } |
| /** |
| * 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 lines) { |
| int oldColumnX = columnX; |
| int oldHScrollOffset = horizontalScrollOffset; |
| int caretLine = getCaretLine(); |
| |
| if (caretLine > 0) { |
| int scrollLines = Math.max(1, Math.min(caretLine, lines)); |
| int scrollOffset; |
| |
| caretLine -= scrollLines; |
| caretOffset = getOffsetAtMouseLocation(columnX, caretLine); |
| if (select) { |
| doSelection(ST.COLUMN_PREVIOUS); |
| } |
| // scroll one page up or to the top |
| scrollOffset = Math.max(0, verticalScrollOffset - scrollLines * getVerticalIncrement()); |
| if (scrollOffset < verticalScrollOffset) { |
| setVerticalScrollOffset(scrollOffset, true); |
| } |
| } |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| // restore the original horizontal caret position |
| 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; |
| } |
| } |
| else // test whether selection actually changed. Fixes 1G71EO1 |
| 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; |
| } |
| } |
| else // test whether selection actually changed. Fixes 1G71EO1 |
| 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, true); |
| 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; |
| advancing = true; |
| if (offsetInLine < content.getLine(caretLine).length()) { |
| caretOffset = getClusterNext(caretOffset, caretLine); |
| showCaret(); |
| } |
| else |
| if (caretLine < content.getLineCount() - 1 && isSingleLine() == false) { |
| // only go to next line if not in single line mode. fixes 5673 |
| caretLine++; |
| caretOffset = content.getOffsetAtLine(caretLine); |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| } |
| } |
| /** |
| * 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; |
| advancing = false; |
| if (offsetInLine > 0) { |
| caretOffset = getClusterPrevious(caretOffset, caretLine); |
| showCaret(caretLine); |
| } |
| 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; |
| int caretLine; |
| int lineStartOffset; |
| |
| if (isSingleLine()) { |
| return; |
| } |
| caretLine = getCaretLine(); |
| lineStartOffset = content.getOffsetAtLine(caretLine); |
| // reset columnX on selection |
| oldColumnX = columnX = getXAtOffset( |
| content.getLine(caretLine), caretLine, caretOffset - lineStartOffset); |
| if (caretLine == content.getLineCount() - 1) { |
| caretOffset = content.getCharCount(); |
| } |
| else { |
| caretLine = doLineDown(); |
| } |
| setMouseWordSelectionAnchor(); |
| // select first and then scroll to reduce flash when key |
| // repeat scrolls lots of lines |
| doSelection(ST.COLUMN_NEXT); |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| // save the original horizontal caret position |
| 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; |
| int caretLine = getCaretLine(); |
| int lineStartOffset = content.getOffsetAtLine(caretLine); |
| |
| // reset columnX on selection |
| oldColumnX = columnX = getXAtOffset( |
| content.getLine(caretLine), caretLine, caretOffset - lineStartOffset); |
| if (caretLine == 0) { |
| caretOffset = 0; |
| } |
| else { |
| caretLine = doLineUp(); |
| } |
| setMouseWordSelectionAnchor(); |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| doSelection(ST.COLUMN_PREVIOUS); |
| // save the original horizontal caret position |
| columnX = oldColumnX; |
| } |
| /** |
| * Scrolls one page down so that the last line (truncated or whole) |
| * of the current page becomes the fully visible top 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 end |
| * of the text where a full page scroll is not possible. In this case |
| * the caret is moved after the last character. |
| * <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 lines) { |
| int oldColumnX; |
| int caretLine = getCaretLine(); |
| int lineStartOffset = content.getOffsetAtLine(caretLine); |
| |
| // reset columnX on selection |
| oldColumnX = columnX = getXAtOffset( |
| content.getLine(caretLine), caretLine, caretOffset - lineStartOffset); |
| doPageDown(true, lines); |
| columnX = oldColumnX; |
| } |
| /** |
| * 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. |
| * <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 lines) { |
| int oldColumnX; |
| int caretLine = getCaretLine(); |
| int lineStartOffset = content.getOffsetAtLine(caretLine); |
| |
| // reset columnX on selection |
| oldColumnX = columnX = getXAtOffset( |
| content.getLine(caretLine), caretLine, caretOffset - lineStartOffset); |
| doPageUp(true, lines); |
| 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 |
| advancing = false; |
| // don't change caret position if in single line mode and the cursor |
| // would be on a different line. fixes 5673 |
| if (isSingleLine() == false || |
| content.getLineAtOffset(caretOffset) == content.getLineAtOffset(newCaretOffset)) { |
| caretOffset = newCaretOffset; |
| showCaret(); |
| } |
| } |
| /** |
| * Moves the caret to the start of the previous word. |
| */ |
| void doSelectionWordPrevious() { |
| int caretLine; |
| advancing = false; |
| caretOffset = getWordStart(caretOffset); |
| 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(caretLine); |
| } |
| /** |
| * 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) { |
| int caretLine; |
| |
| caretOffset = selection.y; |
| caretLine = getCaretLine(); |
| showCaret(caretLine); |
| } |
| 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) { |
| int caretLine; |
| |
| caretOffset = selection.x; |
| caretLine = getCaretLine(); |
| showCaret(caretLine); |
| } |
| else { |
| doSelectionWordPrevious(); |
| } |
| } |
| /** |
| * Draws the specified rectangle. |
| * Draw directly without invalidating the affected area when clearBackground is |
| * false. |
| * <p> |
| * |
| * @param x the x position |
| * @param y the y position |
| * @param width the width |
| * @param height the height |
| * @param clearBackground true=clear the background by invalidating the requested |
| * redraw area, false=draw the foreground directly without invalidating the |
| * redraw area. |
| */ |
| void draw(int x, int y, int width, int height, boolean clearBackground) { |
| if (clearBackground) { |
| redraw(x + leftMargin, y + topMargin, width, height, true); |
| } |
| else { |
| int startLine = (y + verticalScrollOffset) / lineHeight; |
| int endY = y + height; |
| int paintYFromTopLine = (startLine - topIndex) * lineHeight; |
| int topLineOffset = (topIndex * lineHeight - verticalScrollOffset); |
| int paintY = paintYFromTopLine + topLineOffset + topMargin; // adjust y position for pixel based scrolling |
| int lineCount = content.getLineCount(); |
| Color background = getBackground(); |
| Color foreground = getForeground(); |
| GC gc = getGC(); |
| |
| if (isSingleLine()) { |
| lineCount = 1; |
| } |
| for (int i = startLine; paintY < endY && i < lineCount; i++, paintY += lineHeight) { |
| String line = content.getLine(i); |
| renderer.drawLine(line, i, paintY, gc, background, foreground, clearBackground); |
| } |
| gc.dispose(); |
| } |
| } |
| /** |
| * 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. |
| * |
| * @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 |
| */ |
| public int getBaseline() { |
| checkWidget(); |
| return renderer.getBaseline(); |
| } |
| /** |
| * 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> |
| * <p> |
| * @deprecated use BidiSegmentListener instead. |
| * </p> |
| */ |
| public boolean getBidiColoring() { |
| checkWidget(); |
| return bidiColoring; |
| } |
| /** |
| * Returns the index of the last fully visible line. |
| * <p> |
| * |
| * @return index of the last fully visible line. |
| */ |
| int getBottomIndex() { |
| int lineCount = 1; |
| |
| if (lineHeight != 0) { |
| // calculate the number of lines that are fully visible |
| int partialTopLineHeight = topIndex * lineHeight - verticalScrollOffset; |
| lineCount = (getClientArea().height - partialTopLineHeight) / lineHeight; |
| } |
| return Math.min(content.getLineCount() - 1, topIndex + Math.max(0, lineCount - 1)); |
| } |
| /** |
| * Returns the caret position relative to the start of the text. |
| * <p> |
| * |
| * @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 offset at the given x location in the line. |
| * The caret offset is the offset of the character where the caret will be |
| * placed when a mouse click occurs. The caret offset will be the offset of |
| * the character after the clicked one if the mouse click occurs at the second |
| * half of a character. |
| * Doesn't properly handle ligatures and other context dependent characters |
| * unless the current locale is a bidi locale. |
| * Ligatures are handled properly as long as they don't occur at lineXOffset. |
| * <p> |
| * |
| * @param line text of the line to calculate the offset in |
| * @param lineOffset offset of the first character in the line. |
| * 0 based from the beginning of the document. |
| * @param lineXOffset x location in the line |
| * @return caret offset at the x location relative to the start of the line. |
| */ |
| int getOffsetAtX(String line, int lineOffset, int lineXOffset) { |
| int x = lineXOffset - leftMargin + horizontalScrollOffset; |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| int[] trailing = new int[1]; |
| int offsetInLine = layout.getOffset(x, 0, trailing); |
| advancing = false; |
| if (trailing[0] != 0) { |
| int lineLength = line.length(); |
| if (offsetInLine + trailing[0] >= lineLength) { |
| offsetInLine = lineLength; |
| advancing = true; |
| } else { |
| 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; |
| advancing = (level ^ trailingLevel) != 0; |
| } |
| } |
| renderer.disposeTextLayout(layout); |
| return offsetInLine; |
| } |
| /** |
| * Returns the caret width. |
| * <p> |
| * |
| * @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) { |
| String line = content.getLine(lineIndex); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| offset -= lineOffset; |
| offset = layout.getNextOffset(offset, SWT.MOVEMENT_CLUSTER); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| return offset; |
| } |
| int getClusterPrevious(int offset, int lineIndex) { |
| String line = content.getLine(lineIndex); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| 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. |
| * <p> |
| * |
| * @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 logicalContent; |
| } |
| /** |
| * Returns whether the widget implements double click mouse behavior. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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; |
| } |
| /** |
| * Return a GC to use for rendering and update the cached font style to |
| * represent the current style. |
| * <p> |
| * |
| * @return GC. |
| */ |
| GC getGC() { |
| return new GC(this); |
| } |
| /** |
| * Returns the horizontal scroll increment. |
| * <p> |
| * |
| * @return horizontal scroll increment. |
| */ |
| int getHorizontalIncrement() { |
| GC gc = getGC(); |
| int increment = gc.getFontMetrics().getAverageCharWidth(); |
| |
| gc.dispose(); |
| return increment; |
| } |
| /** |
| * Returns the horizontal scroll offset relative to the start of the line. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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 action assigned to the key. |
| * Returns SWT.NULL if there is no action associated with the key. |
| * <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. |
| * @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)); |
| int intAction; |
| |
| if (action == null) { |
| intAction = SWT.NULL; |
| } |
| else { |
| intAction = action.intValue(); |
| } |
| return intAction; |
| } |
| /** |
| * Gets the number of characters. |
| * <p> |
| * |
| * @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 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(); |
| Color lineBackground = null; |
| |
| if (index < 0 || index > logicalContent.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| if (userLineBackground == false) { |
| lineBackground = defaultLineStyler.getLineBackground(index); |
| } |
| return lineBackground; |
| } |
| /** |
| * Returns the line background data for the given line or null if |
| * there is none. |
| * <p> |
| * @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. |
| * <p> |
| * |
| * @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 getLineAtOffset(getCharCount()) + 1; |
| } |
| /** |
| * Returns the number of lines that can be completely displayed in the |
| * widget client area. |
| * <p> |
| * |
| * @return number of lines that can be completely displayed in the widget |
| * client area. |
| */ |
| int getLineCountWhole() { |
| int lineCount; |
| |
| if (lineHeight != 0) { |
| lineCount = getClientArea().height / lineHeight; |
| } |
| else { |
| lineCount = 1; |
| } |
| return lineCount; |
| } |
| /** |
| * 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 logicalContent.getLineAtOffset(offset); |
| } |
| /** |
| * Returns the line delimiter used for entering new lines by key down |
| * or paste operation. |
| * <p> |
| * |
| * @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 a StyledTextEvent that can be used to request data such |
| * as styles and background color for a line. |
| * 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(logicalContent); |
| if (wordWrap) { |
| // if word wrap is on, the line offset and text may be visual (wrapped) |
| int lineIndex = logicalContent.getLineAtOffset(lineOffset); |
| |
| event.detail = logicalContent.getOffsetAtLine(lineIndex); |
| event.text = logicalContent.getLine(lineIndex); |
| } |
| else { |
| event.detail = lineOffset; |
| event.text = line; |
| } |
| notifyListeners(eventType, event); |
| } |
| return event; |
| } |
| /** |
| * Returns the line height. |
| * <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> |
| */ |
| public int getLineHeight() { |
| checkWidget(); |
| return lineHeight; |
| } |
| /** |
| * Returns a LineCache implementation. Depending on whether or not |
| * word wrap is on this may be a line wrapping or line width |
| * calculating implementaiton. |
| * <p> |
| * |
| * @param content StyledTextContent to create the LineCache on. |
| * @return a LineCache implementation |
| */ |
| LineCache getLineCache(StyledTextContent content) { |
| LineCache lineCache; |
| |
| if (wordWrap) { |
| lineCache = new WordWrapCache(this, (WrappedContent) content); |
| } |
| else { |
| lineCache = new ContentWidthCache(this, content); |
| } |
| return lineCache; |
| } |
| /** |
| * Returns the line style data for the given line or null if there is |
| * none. 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 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. |
| * <p> |
| * |
| * @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); |
| } |
| int line = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(line); |
| String lineContent = content.getLine(line); |
| int x = getXAtOffset(lineContent, line, offset - lineOffset); |
| int y = line * lineHeight - verticalScrollOffset; |
| |
| return new Point(x, y); |
| } |
| /** |
| * Returns the character offset of the first character of the given line. |
| * <p> |
| * |
| * @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 >= logicalContent.getLineCount())) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| return logicalContent.getOffsetAtLine(lineIndex); |
| } |
| /** |
| * Returns the offset of the character at the given location relative |
| * to the first character in the document. |
| * 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(); |
| TextLayout layout; |
| int line; |
| int lineOffset; |
| int offsetInLine; |
| String lineText; |
| |
| if (point == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| // is y above first line or is x before first column? |
| if (point.y + verticalScrollOffset < 0 || point.x + horizontalScrollOffset < 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| line = (getTopPixel() + point.y) / lineHeight; |
| // does the referenced line exist? |
| if (line >= content.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| lineText = content.getLine(line); |
| lineOffset = content.getOffsetAtLine(line); |
| |
| int x = point.x - leftMargin + horizontalScrollOffset; |
| layout = renderer.getTextLayout(lineText, lineOffset); |
| Rectangle rect = layout.getLineBounds(0); |
| if (x > rect.x + rect.width) { |
| renderer.disposeTextLayout(layout); |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| int[] trailing = new int[1]; |
| offsetInLine = layout.getOffset(x, 0, trailing); |
| if (offsetInLine != lineText.length() - 1) { |
| offsetInLine = Math.min(lineText.length(), offsetInLine + trailing[0]); |
| } |
| renderer.disposeTextLayout(layout); |
| return lineOffset + offsetInLine; |
| } |
| /** |
| * Returns the offset at the specified x location in the specified line. |
| * <p> |
| * |
| * @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 getOffsetAtMouseLocation(int x, int line) { |
| String lineText = content.getLine(line); |
| int lineOffset = content.getOffsetAtLine(line); |
| return getOffsetAtX(lineText, lineOffset, x) + lineOffset; |
| } |
| /** |
| * Return 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() { |
| int partialLineCount = Compatibility.ceil(getClientArea().height, lineHeight); |
| return Math.min(content.getLineCount(), topIndex + partialLineCount) - 1; |
| } |
| /** |
| * Returns the content in the specified range using the platform line |
| * delimiter to separate lines. |
| * <p> |
| * |
| * @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 = logicalContent.getLineAtOffset(writer.getStart()); |
| int endLine = logicalContent.getLineAtOffset(end); |
| String endLineText = logicalContent.getLine(endLine); |
| int endLineOffset = logicalContent.getOffsetAtLine(endLine); |
| |
| for (int i = startLine; i <= endLine; i++) { |
| writer.writeLine(logicalContent.getLine(i), logicalContent.getOffsetAtLine(i)); |
| if (i < endLine) { |
| writer.writeLineDelimiter(PlatformLineDelimiter); |
| } |
| } |
| if (end > endLineOffset + endLineText.length()) { |
| writer.writeLineDelimiter(PlatformLineDelimiter); |
| } |
| writer.close(); |
| return writer.toString(); |
| } |
| /** |
| * 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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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 (isListening(LineGetSegments) == false) { |
| 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) { |
| StyledTextEvent event; |
| StyleRange [] styles = new StyleRange [0]; |
| int lineLength = line.length(); |
| if (bidiColoring == false) { |
| return new int[] {0, lineLength}; |
| } |
| event = renderer.getLineStyleData(lineOffset, line); |
| if (event != null) { |
| styles = event.styles; |
| } |
| if (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. |
| * 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 (userLineStyle == false) { |
| return defaultLineStyler.getStyleRangeAtOffset(offset); |
| } |
| return null; |
| } |
| /** |
| * Returns the styles. |
| * 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> |
| * |
| * @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> |
| */ |
| public StyleRange [] getStyleRanges() { |
| checkWidget(); |
| StyleRange styles[]; |
| |
| if (userLineStyle == false) { |
| styles = defaultLineStyler.getStyleRanges(); |
| } |
| else { |
| styles = new StyleRange[0]; |
| } |
| return styles; |
| } |
| /** |
| * Returns the styles for the given text range. |
| * 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. |
| * |
| * @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> |
| * |
| * @since 3.0 |
| */ |
| public StyleRange [] getStyleRanges(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); |
| } |
| StyleRange styles[]; |
| |
| if (userLineStyle == false) { |
| styles = defaultLineStyler.getStyleRangesFor(start, length); |
| if (styles == null) return new StyleRange[0]; |
| // adjust the first and last style to reflect the specified |
| // range, clone these styles since the returned styles are the |
| // styles cached by the widget |
| if (styles.length == 1) { |
| StyleRange style = styles[0]; |
| if (style.start < start) { |
| StyleRange newStyle = (StyleRange)styles[0].clone(); |
| newStyle.length = newStyle.length - (start - newStyle.start); |
| newStyle.start = start; |
| styles[0] = newStyle; |
| } |
| if (style.start + style.length > (start + length)) { |
| StyleRange newStyle = (StyleRange)styles[0].clone(); |
| newStyle.length = start + length - newStyle.start; |
| styles[0] = newStyle; |
| } |
| } else if (styles.length > 1) { |
| StyleRange style = styles[0]; |
| if (style.start < start) { |
| StyleRange newStyle = (StyleRange)styles[0].clone(); |
| newStyle.length = newStyle.length - (start - newStyle.start); |
| newStyle.start = start; |
| styles[0] = newStyle; |
| } |
| style = styles[styles.length - 1]; |
| if (style.start + style.length > (start + length)) { |
| StyleRange newStyle = (StyleRange)styles[styles.length - 1].clone(); |
| newStyle.length = start + length - newStyle.start; |
| styles[styles.length - 1] = newStyle; |
| } |
| } |
| } |
| else { |
| styles = new StyleRange[0]; |
| } |
| return styles; |
| } |
| /** |
| * 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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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 = lineStart * lineHeight; |
| int height = (lineEnd + 1) * lineHeight - y; |
| int left = 0x7fffffff, right = 0; |
| for (int i = lineStart; i <= lineEnd; i++) { |
| int lineOffset = content.getOffsetAtLine(i); |
| String line = content.getLine(i); |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| if (i == lineStart && i == lineEnd) { |
| rect = layout.getBounds(start - lineOffset, end - lineOffset); |
| } else if (i == lineStart) { |
| rect = layout.getBounds(start - lineOffset, line.length()); |
| } else if (i == lineEnd) { |
| rect = layout.getBounds(0, end - lineOffset); |
| } else { |
| rect = layout.getLineBounds(0); |
| } |
| left = Math.min (left, rect.x); |
| right = Math.max (right, rect.x + rect.width); |
| renderer.disposeTextLayout(layout); |
| } |
| rect = new Rectangle (left, y, right-left, height); |
| rect.x += leftMargin - horizontalScrollOffset; |
| rect.y -= verticalScrollOffset; |
| return rect; |
| } |
| /** |
| * Returns the widget content starting at start for length characters. |
| * <p> |
| * |
| * @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. 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(); |
| int logicalTopIndex = topIndex; |
| |
| if (wordWrap) { |
| int visualLineOffset = content.getOffsetAtLine(topIndex); |
| logicalTopIndex = logicalContent.getLineAtOffset(visualLineOffset); |
| } |
| return logicalTopIndex; |
| } |
| /** |
| * Gets the top pixel. 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 verticalScrollOffset; |
| } |
| /** |
| * Returns the vertical scroll increment. |
| * <p> |
| * |
| * @return vertical scroll increment. |
| */ |
| int getVerticalIncrement() { |
| return lineHeight; |
| } |
| 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 (advancing && 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(line, lineOffset); |
| 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. |
| * When in word wrap mode and at the end of one wrapped line/ |
| * beginning of the continuing wrapped line the caret offset |
| * is not sufficient to determine the caret line. |
| * |
| * @return the index of the line the caret is on. |
| */ |
| int getCaretLine() { |
| int caretLine = content.getLineAtOffset(caretOffset); |
| int leftColumnX = leftMargin; |
| if (wordWrap && columnX <= leftColumnX && |
| caretLine < content.getLineCount() - 1 && |
| caretOffset == content.getOffsetAtLine(caretLine + 1)) { |
| caretLine++; |
| } |
| return caretLine; |
| } |
| /** |
| * 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) { |
| int line = logicalContent.getLineAtOffset(offset); |
| int lineOffset = logicalContent.getOffsetAtLine(line); |
| String lineText = logicalContent.getLine(line); |
| int lineLength = lineText.length(); |
| |
| if (offset >= getCharCount()) { |
| return offset; |
| } |
| if (offset == lineOffset + lineLength) { |
| line++; |
| offset = logicalContent.getOffsetAtLine(line); |
| } |
| else { |
| TextLayout layout = renderer.getTextLayout(lineText, lineOffset); |
| 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) { |
| int line = logicalContent.getLineAtOffset(offset); |
| int lineOffset = logicalContent.getOffsetAtLine(line); |
| String lineText = logicalContent.getLine(line); |
| int lineLength = lineText.length(); |
| |
| if (offset >= getCharCount()) { |
| return offset; |
| } |
| if (offset == lineOffset + lineLength) { |
| line++; |
| offset = logicalContent.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) == false) { |
| offset++; |
| ch = lineText.charAt(offset); |
| } |
| if (offset == lineLength - 1 && Compatibility.isLetterOrDigit(ch) == letterOrDigit && Compatibility.isSpaceChar(ch) == false) { |
| 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) { |
| int line = logicalContent.getLineAtOffset(offset); |
| int lineOffset = logicalContent.getOffsetAtLine(line); |
| String lineText = logicalContent.getLine(line); |
| |
| if (offset <= 0) { |
| return offset; |
| } |
| if (offset == lineOffset) { |
| line--; |
| lineText = logicalContent.getLine(line); |
| offset = logicalContent.getOffsetAtLine(line) + lineText.length(); |
| } |
| else { |
| TextLayout layout = renderer.getTextLayout(lineText, lineOffset); |
| offset -= lineOffset; |
| offset = layout.getPreviousOffset(offset, SWT.MOVEMENT_WORD); |
| offset += lineOffset; |
| renderer.disposeTextLayout(layout); |
| } |
| return offset; |
| } |
| /** |
| * Returns whether the widget wraps lines. |
| * <p> |
| * |
| * @return true if widget wraps lines, false otherwise |
| * @since 2.0 |
| */ |
| public boolean getWordWrap() { |
| checkWidget(); |
| return wordWrap; |
| } |
| /** |
| * Returns the x location of the character at the give offset in the line. |
| * <b>NOTE:</b> Does not return correct values for true italic fonts (vs. slanted fonts). |
| * <p> |
| * |
| * @return x location of the character at the given offset in the line. |
| */ |
| int getXAtOffset(String line, int lineIndex, int offsetInLine) { |
| int x = 0; |
| int lineLength = line.length(); |
| if (lineIndex < content.getLineCount() - 1) { |
| int endLineOffset = content.getOffsetAtLine(lineIndex + 1) - 1; |
| if (lineLength < offsetInLine && offsetInLine <= endLineOffset) { |
| offsetInLine = lineLength; |
| } |
| } |
| if (lineLength != 0 && offsetInLine <= lineLength) { |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| if (!advancing || offsetInLine == 0) { |
| x = layout.getLocation(offsetInLine, false).x; |
| } else { |
| x = layout.getLocation(offsetInLine - 1, true).x; |
| } |
| renderer.disposeTextLayout(layout); |
| } |
| return x + leftMargin - horizontalScrollOffset; |
| } |
| /** |
| * Inserts a string. The old selection is replaced with the new text. |
| * <p> |
| * |
| * @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); |
| } |
| }; |
| logicalContent = content = new DefaultContent(); |
| content.addTextChangeListener(textChangeListener); |
| } |
| /** |
| * Creates a default line style listener. |
| * Used to store line background colors and styles. |
| * Removed when the user sets a LineStyleListener. |
| * <p> |
| * |
| * @see #addLineStyleListener |
| */ |
| void installDefaultLineStyler() { |
| defaultLineStyler = new DefaultLineStyler(logicalContent); |
| StyledTextListener typedListener = new StyledTextListener(defaultLineStyler); |
| if (userLineStyle == false) { |
| addListener(LineGetStyle, typedListener); |
| } |
| if (userLineBackground == false) { |
| addListener(LineGetBackground, typedListener); |
| } |
| } |
| /** |
| * 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.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); |
| 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); |
| } |
| }); |
| } |
| } |
| StyledTextContent internalGetContent() { |
| return content; |
| } |
| int internalGetHorizontalPixel() { |
| return horizontalScrollOffset; |
| } |
| LineCache internalGetLineCache() { |
| return lineCache; |
| } |
| Point internalGetSelection() { |
| return selection; |
| } |
| boolean internalGetWordWrap() { |
| return wordWrap; |
| } |
| /** |
| * Used by WordWrapCache to bypass StyledText.redraw which does |
| * an unwanted cache reset. |
| */ |
| void internalRedraw() { |
| super.redraw(); |
| } |
| /** |
| * Redraws the specified text range. |
| * <p> |
| * |
| * @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. |
| */ |
| void internalRedrawRange(int start, int length, boolean clearBackground) { |
| int end = start + length; |
| int firstLine = content.getLineAtOffset(start); |
| int lastLine = content.getLineAtOffset(end); |
| int offsetInFirstLine; |
| int partialBottomIndex = getPartialBottomIndex(); |
| int partialTopIndex = verticalScrollOffset / lineHeight; |
| // do nothing if redraw range is completely invisible |
| if (firstLine > partialBottomIndex || lastLine < partialTopIndex) { |
| return; |
| } |
| // only redraw visible lines |
| if (partialTopIndex > firstLine) { |
| firstLine = partialTopIndex; |
| offsetInFirstLine = 0; |
| } |
| else { |
| offsetInFirstLine = start - content.getOffsetAtLine(firstLine); |
| } |
| if (partialBottomIndex + 1 < lastLine) { |
| lastLine = partialBottomIndex + 1; // + 1 to redraw whole bottom line, including line break |
| end = content.getOffsetAtLine(lastLine); |
| } |
| redrawLines(firstLine, offsetInFirstLine, lastLine, end, clearBackground); |
| |
| // redraw entire center lines if redraw range includes more than two lines |
| if (lastLine - firstLine > 1) { |
| Rectangle clientArea = getClientArea(); |
| int redrawStopY = lastLine * lineHeight - verticalScrollOffset; |
| int redrawY = (firstLine + 1) * lineHeight - verticalScrollOffset; |
| draw(0, redrawY, clientArea.width, redrawStopY - redrawY, clearBackground); |
| } |
| } |
| /** |
| * Returns the widget text with style information encoded using RTF format |
| * specification version 1.5. |
| * |
| * @return the widget text with style information encoded using 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> |
| */ |
| String getRtf(){ |
| checkWidget(); |
| RTFWriter rtfWriter = new RTFWriter(0, getCharCount()); |
| return getPlatformDelimitedText(rtfWriter); |
| } |
| /** |
| * Frees resources. |
| */ |
| void handleDispose(Event event) { |
| removeListener(SWT.Dispose, listener); |
| notifyListeners(SWT.Dispose, event); |
| event.type = SWT.None; |
| |
| clipboard.dispose(); |
| ibeamCursor.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 (defaultLineStyler != null) { |
| defaultLineStyler.release(); |
| defaultLineStyler = null; |
| } |
| if (isBidiCaret()) { |
| BidiUtil.removeLanguageListener(handle); |
| } |
| selectionBackground = null; |
| selectionForeground = null; |
| logicalContent = null; |
| textChangeListener = null; |
| lineCache = null; |
| ibeamCursor = null; |
| selection = null; |
| doubleClickSelection = null; |
| keyActionMap = null; |
| background = null; |
| foreground = null; |
| clipboard = null; |
| } |
| /** |
| * Scrolls the widget horizontally. |
| */ |
| void handleHorizontalScroll(Event event) { |
| int scrollPixel = getHorizontalBar().getSelection() - horizontalScrollOffset; |
| scrollHorizontal(scrollPixel); |
| } |
| /** |
| * 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. |
| * <p> |
| * |
| * @param event keyboard event |
| */ |
| void handleKey(Event event) { |
| int action; |
| advancing = true; |
| 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); |
| } |
| } |
| else { |
| invokeAction(action); |
| } |
| } |
| /** |
| * If a VerifyKey listener exists, verify that the key that was entered |
| * should be processed. |
| * <p> |
| * |
| * @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 == true) { |
| handleKey(event); |
| } |
| } |
| /** |
| * Update the Selection Clipboard. |
| * <p> |
| * |
| * @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 == false) { |
| return; |
| } |
| event.y -= topMargin; |
| 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) { |
| mouseDown = true; |
| mouseDoubleClick = false; |
| if (event.button == 2) { |
| String text = (String)getClipboardContent(DND.SELECTION_CLIPBOARD); |
| if (text != null && text.length() > 0) { |
| // position cursor |
| int x = event.x; |
| int y = event.y - topMargin; |
| doMouseLocationChange(x, 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; |
| event.y -= topMargin; |
| 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; |
| } |
| event.y -= topMargin; |
| 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; |
| event.y -= topMargin; |
| endAutoScroll(); |
| 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. |
| * <p> |
| * |
| * @param event paint event |
| */ |
| void handlePaint(Event event) { |
| int startLine = Math.max(0, (event.y - topMargin + verticalScrollOffset) / lineHeight); |
| int paintYFromTopLine = (startLine - topIndex) * lineHeight; |
| int topLineOffset = topIndex * lineHeight - verticalScrollOffset; |
| int startY = paintYFromTopLine + topLineOffset + topMargin; // adjust y position for pixel based scrolling and top margin |
| int renderHeight = event.y + event.height - startY; |
| |
| // Check if there is work to do |
| if (event.height == 0) { |
| return; |
| } |
| performPaint(event.gc, startLine, startY, renderHeight); |
| } |
| /** |
| * Recalculates the scroll bars. Rewraps all lines when in word |
| * wrap mode. |
| * <p> |
| * |
| * @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; |
| redraw(x, 0, rightMargin, oldHeight, false); |
| } |
| } |
| if (oldHeight != clientAreaHeight) { |
| if (bottomMargin > 0) { |
| int y = (oldHeight < clientAreaHeight ? oldHeight : clientAreaHeight)- bottomMargin; |
| redraw(0, y, oldWidth, bottomMargin, false); |
| } |
| } |
| if (wordWrap) { |
| if (oldWidth != clientAreaWidth) { |
| wordWrapResize(oldWidth); |
| } |
| } |
| else |
| if (clientAreaHeight > oldHeight) { |
| int lineCount = content.getLineCount(); |
| int oldBottomIndex = topIndex + oldHeight / lineHeight; |
| int newItemCount = Compatibility.ceil(clientAreaHeight - oldHeight, lineHeight); |
| |
| oldBottomIndex = Math.min(oldBottomIndex, lineCount); |
| newItemCount = Math.min(newItemCount, lineCount - oldBottomIndex); |
| lineCache.calculate(oldBottomIndex, newItemCount); |
| } |
| setScrollBars(); |
| claimBottomFreeSpace(); |
| claimRightFreeSpace(); |
| if (oldHeight != clientAreaHeight) { |
| calculateTopIndex(); |
| } |
| } |
| /** |
| * Updates the caret position and selection and the scroll bars to reflect |
| * the content change. |
| * <p> |
| */ |
| void handleTextChanged(TextChangedEvent event) { |
| lineCache.textChanged(lastTextChangeStart, |
| lastTextChangeNewLineCount, |
| lastTextChangeReplaceLineCount, |
| lastTextChangeNewCharCount, |
| lastTextChangeReplaceCharCount); |
| setScrollBars(); |
| // 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. |
| // fixes 1GB93QT |
| updateSelection( |
| lastTextChangeStart, |
| lastTextChangeReplaceCharCount, |
| lastTextChangeNewCharCount); |
| |
| if (lastTextChangeReplaceLineCount > 0) { |
| // Only check for unused space when lines are deleted. |
| // Fixes 1GFL4LY |
| // Scroll up so that empty lines below last text line are used. |
| // Fixes 1GEYJM0 |
| claimBottomFreeSpace(); |
| } |
| if (lastTextChangeReplaceCharCount > 0) { |
| // fixes bug 8273 |
| claimRightFreeSpace(); |
| } |
| // do direct drawing if the text change is confined to a single line. |
| // optimization and fixes bug 13999. see also handleTextChanging. |
| if (lastTextChangeNewLineCount == 0 && lastTextChangeReplaceLineCount == 0) { |
| int startLine = content.getLineAtOffset(lastTextChangeStart); |
| int startY = startLine * lineHeight - verticalScrollOffset + topMargin; |
| |
| if (DOUBLE_BUFFER) { |
| GC gc = getGC(); |
| Caret caret = getCaret(); |
| boolean caretVisible = false; |
| |
| if (caret != null) { |
| caretVisible = caret.getVisible(); |
| caret.setVisible(false); |
| } |
| performPaint(gc, startLine, startY, lineHeight); |
| if (caret != null) { |
| caret.setVisible(caretVisible); |
| } |
| gc.dispose(); |
| } else { |
| redraw(0, startY, getClientArea().width, lineHeight, false); |
| update(); |
| } |
| } |
| } |
| /** |
| * Updates the screen to reflect a pending content change. |
| * <p> |
| * |
| * @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) { |
| int firstLine; |
| int textChangeY; |
| boolean isMultiLineChange = event.replaceLineCount > 0 || event.newLineCount > 0; |
| |
| 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; |
| firstLine = content.getLineAtOffset(event.start); |
| textChangeY = firstLine * lineHeight - verticalScrollOffset + topMargin; |
| if (isMultiLineChange) { |
| redrawMultiLineChange(textChangeY, event.newLineCount, event.replaceLineCount); |
| } |
| // notify default line styler about text change |
| if (defaultLineStyler != null) { |
| defaultLineStyler.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. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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) { |
| setVerticalScrollOffset(getVerticalBar().getSelection(), false); |
| } |
| /** |
| * Add accessibility support for the widget. |
| */ |
| void initializeAccessible() { |
| final Accessible accessible = getAccessible(); |
| accessible.addAccessibleListener(new AccessibleAdapter() { |
| public void getHelp(AccessibleEvent e) { |
| e.result = getToolTipText(); |
| } |
| }); |
| 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() == false) state |= ACC.STATE_INVISIBLE; |
| if (getEditable() == false) 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); |
| } |
| }); |
| } |
| /** |
| * Initializes the fonts used to render font styles. |
| * Presently only regular and bold fonts are supported. |
| */ |
| void initializeRenderer() { |
| if (renderer != null) { |
| renderer.dispose(); |
| } |
| renderer = new DisplayRenderer(getDisplay(), getFont(), this, tabLength); |
| lineHeight = renderer.getLineHeight(); |
| if (wordWrap) { |
| content = new WrappedContent(renderer, logicalContent); |
| } |
| } |
| /** |
| * Executes the action. |
| * <p> |
| * |
| * @param action one of the actions defined in ST.java |
| */ |
| public void invokeAction(int action) { |
| int oldColumnX, oldHScrollOffset, hScrollChange; |
| int caretLine; |
| |
| checkWidget(); |
| updateCaretDirection = true; |
| switch (action) { |
| // Navigation |
| case ST.LINE_UP: |
| caretLine = doLineUp(); |
| oldColumnX = columnX; |
| oldHScrollOffset = horizontalScrollOffset; |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| // restore the original horizontal caret position |
| hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| clearSelection(true); |
| break; |
| case ST.LINE_DOWN: |
| caretLine = doLineDown(); |
| oldColumnX = columnX; |
| oldHScrollOffset = horizontalScrollOffset; |
| // explicitly go to the calculated caret line. may be different |
| // from content.getLineAtOffset(caretOffset) when in word wrap mode |
| showCaret(caretLine); |
| // restore the original horizontal caret position |
| hScrollChange = oldHScrollOffset - horizontalScrollOffset; |
| columnX = oldColumnX + hScrollChange; |
| 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, getLineCountWhole()); |
| clearSelection(true); |
| break; |
| case ST.PAGE_DOWN: |
| doPageDown(false, getLineCountWhole()); |
| 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(getLineCountWhole()); |
| break; |
| case ST.SELECT_PAGE_DOWN: |
| doSelectionPageDown(getLineCountWhole()); |
| 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; |
| } |
| /** |
| * 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 or not the given lines are visible. |
| * <p> |
| * |
| * @return true if any of the lines is visible |
| * false if none of the lines is visible |
| */ |
| boolean isAreaVisible(int firstLine, int lastLine) { |
| int partialBottomIndex = getPartialBottomIndex(); |
| int partialTopIndex = verticalScrollOffset / lineHeight; |
| boolean notVisible = firstLine > partialBottomIndex || lastLine < partialTopIndex; |
| return !notVisible; |
| } |
| /** |
| * Returns whether the widget can have only one line. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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(logicalContent); |
| 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); |
| String lineText = content.getLine(lineIndex); |
| TextLayout layout = renderer.getTextLayout(lineText, lineOffset); |
| int levelStart = layout.getLevel(event.start - lineOffset); |
| int lineIndexEnd = content.getLineAtOffset(event.end); |
| if (lineIndex != lineIndexEnd) { |
| renderer.disposeTextLayout(layout); |
| lineOffset = content.getOffsetAtLine(lineIndexEnd); |
| lineText = content.getLine(lineIndexEnd); |
| layout = renderer.getTextLayout(lineText, lineOffset); |
| } |
| int levelEnd = layout.getLevel(event.end - lineOffset); |
| renderer.disposeTextLayout(layout); |
| advancing = levelStart != levelEnd; |
| } |
| } |
| 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 |
| internalSetSelection(event.start + event.text.length(), 0, true); |
| showCaret(); |
| } |
| sendModifyEvent(event); |
| if (isListening(ExtendedModify)) { |
| notifyListeners(ExtendedModify, styledTextEvent); |
| } |
| } |
| } |
| /** |
| * 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. |
| * <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 paste(){ |
| checkWidget(); |
| String text; |
| 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); |
| } |
| } |
| /** |
| * Render the specified area. Broken out as its own method to support |
| * direct drawing. |
| * <p> |
| * |
| * @param gc GC to render on |
| * @param startLine first line to render |
| * @param startY y pixel location to start rendering at |
| * @param renderHeight renderHeight widget area that needs to be filled with lines |
| */ |
| void performPaint(GC gc,int startLine,int startY, int renderHeight) { |
| Rectangle clientArea = getClientArea(); |
| Color background = getBackground(); |
| |
| // Check if there is work to do. We never want to try and create |
| // an Image with 0 width or 0 height. |
| if (clientArea.width == 0) { |
| return; |
| } |
| if (renderHeight > 0) { |
| // renderHeight will be negative when only top margin needs redrawing |
| Color foreground = getForeground(); |
| int lineCount = content.getLineCount(); |
| int gcStyle = isMirrored() ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT; |
| if (isSingleLine()) { |
| lineCount = 1; |
| } |
| int paintY, paintHeight; |
| Image lineBuffer; |
| GC lineGC; |
| boolean doubleBuffer = DOUBLE_BUFFER && lastPaintTopIndex == topIndex; |
| lastPaintTopIndex = topIndex; |
| if (doubleBuffer) { |
| paintY = 0; |
| paintHeight = renderHeight; |
| lineBuffer = new Image(getDisplay(), clientArea.width, renderHeight); |
| lineGC = new GC(lineBuffer, gcStyle); |
| lineGC.setFont(getFont()); |
| lineGC.setForeground(foreground); |
| lineGC.setBackground(background); |
| } else { |
| paintY = startY; |
| paintHeight = startY + renderHeight; |
| lineBuffer = null; |
| lineGC = gc; |
| } |
| for (int i = startLine; paintY < paintHeight && i < lineCount; i++, paintY += lineHeight) { |
| String line = content.getLine(i); |
| renderer.drawLine(line, i, paintY, lineGC, background, foreground, true); |
| } |
| if (paintY < paintHeight) { |
| lineGC.setBackground(background); |
| lineGC.fillRectangle(0, paintY, clientArea.width, paintHeight - paintY); |
| } |
| if (doubleBuffer) { |
| clearMargin(lineGC, background, clientArea, startY); |
| gc.drawImage(lineBuffer, 0, startY); |
| lineGC.dispose(); |
| lineBuffer.dispose(); |
| } |
| } |
| clearMargin(gc, background, clientArea, 0); |
| } |
| /** |
| * 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(); |
| StyledTextPrintOptions options = new StyledTextPrintOptions(); |
| options.printTextForeground = true; |
| options.printTextBackground = true; |
| options.printTextFontStyle = true; |
| options.printLineBackground = true; |
| if (printer == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| 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() { |
| int itemCount; |
| |
| super.redraw(); |
| itemCount = getPartialBottomIndex() - topIndex + 1; |
| lineCache.redrawReset(topIndex, itemCount, true); |
| lineCache.calculate(topIndex, itemCount); |
| setHorizontalScrollBar(); |
| } |
| /** |
| * 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 lineCount = content.getLineCount(); |
| int startLine = (getTopPixel() + y) / lineHeight; |
| int endLine = startLine + Compatibility.ceil(height, lineHeight); |
| int itemCount; |
| |
| // reset all lines in the redraw rectangle |
| startLine = Math.min(startLine, lineCount); |
| itemCount = Math.min(endLine, lineCount) - startLine; |
| lineCache.reset(startLine, itemCount, true); |
| // only calculate the visible lines |
| itemCount = getPartialBottomIndex() - topIndex + 1; |
| lineCache.calculate(topIndex, itemCount); |
| setHorizontalScrollBar(); |
| } |
| } |
| /** |
| * Redraw the given line. |
| * <p> |
| * |
| * @param line index of the line to redraw |
| * @param offset offset in line to start redrawing |
| */ |
| void redrawLine(int line, int offset) { |
| int redrawX = 0; |
| if (offset > 0) { |
| String lineText = content.getLine(line); |
| redrawX = getXAtOffset(lineText, line, offset); |
| } |
| int redrawY = line * lineHeight - verticalScrollOffset; |
| super.redraw( |
| redrawX + leftMargin, redrawY + topMargin, |
| getClientArea().width - leftMargin - rightMargin, lineHeight, true); |
| } |
| /** |
| * Redraws a text range in the specified lines |
| * <p> |
| * |
| * @param firstLine first line to redraw at the specified offset |
| * @param offsetInFirstLine offset in firstLine to start redrawing |
| * @param lastLine last line to redraw |
| * @param endOffset offset in the last where redrawing should stop |
| * @param clearBackground true=clear the background by invalidating |
| * the requested redraw range. 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. |
| * false=draw the foreground directly without invalidating the |
| * redraw range. |
| */ |
| void redrawLines(int firstLine, int offsetInFirstLine, int lastLine, int endOffset, boolean clearBackground) { |
| String line = content.getLine(firstLine); |
| int lineCount = lastLine - firstLine + 1; |
| int redrawY, redrawWidth; |
| int lineOffset = content.getOffsetAtLine(firstLine); |
| boolean fullLineRedraw; |
| Rectangle clientArea = getClientArea(); |
| |
| fullLineRedraw = ((getStyle() & SWT.FULL_SELECTION) != 0 && lastLine > firstLine); |
| // if redraw range includes last character on the first line, |
| // clear background to right widget border. fixes bug 19595. |
| if (clearBackground && endOffset - lineOffset >= line.length()) { |
| fullLineRedraw = true; |
| } |
| TextLayout layout = renderer.getTextLayout(line, lineOffset); |
| Rectangle rect = layout.getBounds(offsetInFirstLine, Math.min(endOffset, line.length()) - 1); |
| renderer.disposeTextLayout(layout); |
| rect.x -= horizontalScrollOffset; |
| rect.intersect(clientArea); |
| redrawY = firstLine * lineHeight - verticalScrollOffset; |
| redrawWidth = fullLineRedraw ? clientArea.width - leftMargin - rightMargin : rect.width; |
| draw(rect.x, redrawY, redrawWidth, lineHeight, clearBackground); |
| |
| // redraw last line if more than one line needs redrawing |
| if (lineCount > 1) { |
| lineOffset = content.getOffsetAtLine(lastLine); |
| int offsetInLastLine = endOffset - lineOffset; |
| // no redraw necessary if redraw offset is 0 |
| if (offsetInLastLine > 0) { |
| line = content.getLine(lastLine); |
| // if redraw range includes last character on the last line, |
| // clear background to right widget border. fixes bug 19595. |
| if (clearBackground && offsetInLastLine >= line.length()) { |
| fullLineRedraw = true; |
| } |
| line = content.getLine(lastLine); |
| layout = renderer.getTextLayout(line, lineOffset); |
| rect = layout.getBounds(0, offsetInLastLine - 1); |
| renderer.disposeTextLayout(layout); |
| rect.x -= horizontalScrollOffset; |
| rect.intersect(clientArea); |
| redrawY = lastLine * lineHeight - verticalScrollOffset; |
| redrawWidth = fullLineRedraw ? clientArea.width - leftMargin - rightMargin : rect.width; |
| draw(rect.x, redrawY, redrawWidth, lineHeight, clearBackground); |
| } |
| } |
| } |
| /** |
| * Fixes the widget to display a text change. |
| * Bit blitting and redrawing is done as necessary. |
| * <p> |
| * |
| * @param y y location of the text change |
| * @param newLineCount number of new lines. |
| * @param replacedLineCount number of replaced lines. |
| */ |
| void redrawMultiLineChange(int y, int newLineCount, int replacedLineCount) { |
| Rectangle clientArea = getClientArea(); |
| int lineCount = newLineCount - replacedLineCount; |
| int sourceY; |
| int destinationY; |
| |
| if (lineCount > 0) { |
| sourceY = Math.max(0, y + lineHeight); |
| destinationY = sourceY + lineCount * lineHeight; |
| } |
| else { |
| destinationY = Math.max(0, y + lineHeight); |
| sourceY = destinationY - lineCount * lineHeight; |
| } |
| scroll( |
| 0, destinationY, // destination x, y |
| 0, sourceY, // source x, y |
| clientArea.width, clientArea.height, true); |
| // Always redrawing causes the bottom line to flash when a line is |
| // deleted. This is because SWT merges the paint area of the scroll |
| // with the paint area of the redraw call below. |
| // To prevent this we could call update after the scroll. However, |
| // adding update can cause even more flash if the client does other |
| // redraw/update calls (ie. for syntax highlighting). |
| // We could also redraw only when a line has been added or when |
| // contents has been added to a line. This would require getting |
| // line index info from the content and is not worth the trouble |
| // (the flash is only on the bottom line and minor). |
| // Specifying the NO_MERGE_PAINTS style bit prevents the merged |
| // redraw but could cause flash/slowness elsewhere. |
| if (y + lineHeight > 0 && y <= clientArea.height) { |
| // redraw first changed line in case a line was split/joined |
| super.redraw(0, y, clientArea.width, lineHeight, true); |
| } |
| if (newLineCount > 0) { |
| int redrawStartY = y + lineHeight; |
| int redrawHeight = newLineCount * lineHeight; |
| |
| if (redrawStartY + redrawHeight > 0 && redrawStartY <= clientArea.height) { |
| // display new text |
| super.redraw(0, redrawStartY, clientArea.width, redrawHeight, true); |
| } |
| } |
| } |
| /** |
| * Redraws the specified text range. |
| * <p> |
| * |
| * @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(); |
| int firstLine; |
| int lastLine; |
| |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| firstLine = content.getLineAtOffset(start); |
| lastLine = content.getLineAtOffset(end); |
| // reset all affected lines but let the redraw recalculate only |
| // those that are visible. |
| lineCache.reset(firstLine, lastLine - firstLine + 1, true); |
| internalRedrawRange(start, length, clearBackground); |
| } |
| /** |
| * Removes the specified bidirectional segment listener. |
| * <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> |
| * @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. |
| * <p> |
| * |
| * @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. |
| * <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 removeLineBackgroundListener(LineBackgroundListener listener) { |
| checkWidget(); |
| if (listener == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| removeListener(LineGetBackground, listener); |
| // use default line styler if last user line styler was removed. |
| if (isListening(LineGetBackground) == false && userLineBackground) { |
| StyledTextListener typedListener = new StyledTextListener(defaultLineStyler); |
| addListener(LineGetBackground, typedListener); |
| userLineBackground = false; |
| } |
| } |
| /** |
| * Removes the specified line style listener. |
| * <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 removeLineStyleListener(LineStyleListener listener) { |
| checkWidget(); |
| if (listener == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| removeListener(LineGetStyle, listener); |
| // use default line styler if last user line styler was removed. Fixes 1G7B1X2 |
| if (isListening(LineGetStyle) == false && userLineStyle) { |
| StyledTextListener typedListener = new StyledTextListener(defaultLineStyler); |
| addListener(LineGetStyle, typedListener); |
| userLineStyle = false; |
| } |
| } |
| /** |
| * Removes the specified modify listener. |
| * <p> |
| * |
| * @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 selection listener. |
| * <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 removeSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| removeListener(SWT.Selection, listener); |
| } |
| /** |
| * Removes the specified verify listener. |
| * <p> |
| * |
| * @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. |
| * <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 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> |
| * 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 string is null</li> |
| * </ul> |
| * @since 2.0 |
| */ |
| public void replaceStyleRanges(int start, int length, StyleRange[] ranges) { |
| checkWidget(); |
| if (userLineStyle) { |
| return; |
| } |
| if (ranges == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| if (ranges.length == 0) { |
| setStyleRange(new StyleRange(start, length, null, null)); |
| return; |
| } |
| int end = start + length; |
| if (start > end || start < 0 || end > getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| int firstLine = content.getLineAtOffset(start); |
| int lastLine = content.getLineAtOffset(end); |
| |
| defaultLineStyler.replaceStyleRanges(start, length, ranges); |
| lineCache.reset(firstLine, lastLine - firstLine + 1, true); |
| |
| // if the area is not visible, there is no need to redraw |
| if (isAreaVisible(firstLine, lastLine)) { |
| int redrawY = firstLine * lineHeight - verticalScrollOffset; |
| int redrawStopY = (lastLine + 1) * lineHeight - verticalScrollOffset; |
| draw(0, redrawY, getClientArea().width, redrawStopY - redrawY, true); |
| } |
| |
| // make sure that the caret is positioned correctly. |
| // caret location may change if font style changes. |
| // fixes 1G8FODP |
| setCaretLocation(); |
| } |
| /** |
| * 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(); |
| int contentLength = getCharCount(); |
| int end = start + length; |
| Event event = new Event(); |
| |
| if (start > end || start < 0 || end > contentLength) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| if (text == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| 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; |
| topOffset = 0; |
| verticalScrollOffset = 0; |
| horizontalScrollOffset = 0; |
| resetSelection(); |
| // discard any styles that may have been set by creating a |
| // new default line styler |
| if (defaultLineStyler != null) { |
| removeLineBackgroundListener(defaultLineStyler); |
| removeLineStyleListener(defaultLineStyler); |
| installDefaultLineStyler(); |
| } |
| calculateContentWidth(); |
| if (verticalBar != null) { |
| verticalBar.setSelection(0); |
| } |
| if (horizontalBar != null) { |
| horizontalBar.setSelection(0); |
| } |
| setScrollBars(); |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * Resets the selection. |
| */ |
| void resetSelection() { |
| selection.x = selection.y = caretOffset; |
| selectionAnchor = -1; |
| } |
| /** |
| * Scrolls the widget horizontally. |
| * <p> |
| * |
| * @param pixels number of pixels to scroll, > 0 = scroll left, |
| * < 0 scroll right |
| */ |
| void scrollHorizontal(int pixels) { |
| Rectangle clientArea; |
| |
| if (pixels == 0) { |
| return; |
| } |
| clientArea = getClientArea(); |
| if (pixels > 0) { |
| int sourceX = leftMargin + pixels; |
| int scrollWidth = clientArea.width - sourceX - rightMargin; |
| int scrollHeight = clientArea.height - topMargin - bottomMargin; |
| scroll( |
| leftMargin, topMargin, // destination x, y |
| sourceX, topMargin, // source x, y |
| scrollWidth, scrollHeight, true); |
| if (sourceX > scrollWidth) { |
| // redraw from end of scrolled area to beginning of scroll |
| // invalidated area |
| super.redraw( |
| leftMargin + scrollWidth, topMargin, |
| pixels - scrollWidth, scrollHeight, true); |
| } |
| } |
| else { |
| int destinationX = leftMargin - pixels; |
| int scrollWidth = clientArea.width - destinationX - rightMargin; |
| int scrollHeight = clientArea.height - topMargin - bottomMargin; |
| scroll( |
| destinationX, topMargin, // destination x, y |
| leftMargin, topMargin, // source x, y |
| scrollWidth, scrollHeight, true); |
| if (destinationX > scrollWidth) { |
| // redraw from end of scroll invalidated area to scroll |
| // destination |
| super.redraw( |
| leftMargin + scrollWidth, topMargin, |
| -pixels - scrollWidth, scrollHeight, true); |
| } |
| } |
| horizontalScrollOffset += pixels; |
| int oldColumnX = columnX - pixels; |
| setCaretLocation(); |
| // restore the original horizontal caret index |
| columnX = oldColumnX; |
| } |
| /** |
| * Scrolls the widget horizontally and adjust the horizontal scroll |
| * bar to reflect the new horizontal offset.. |
| * <p> |
| * |
| * @param pixels number of pixels to scroll, > 0 = scroll left, |
| * < 0 scroll right |
| * @return |
| * true=the widget was scrolled |
| * false=the widget was not scrolled, the given offset is not valid. |
| */ |
| boolean scrollHorizontalBar(int pixels) { |
| if (pixels == 0) { |
| return false; |
| } |
| ScrollBar horizontalBar = getHorizontalBar(); |
| if (horizontalBar != null) { |
| horizontalBar.setSelection(horizontalScrollOffset + pixels); |
| } |
| scrollHorizontal(pixels); |
| return true; |
| } |
| /** |
| * Selects all the text. |
| * <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 selectAll() { |
| checkWidget(); |
| setSelection(0, Math.max(getCharCount(),0)); |
| } |
| /** |
| * Replaces/inserts text as defined by the event. |
| * <p> |
| * |
| * @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 == false) { |
| return; |
| } |
| modifyContent(event, true); |
| } |
| 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 whether the widget wraps lines. |
| * 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 (wrap != wordWrap) { |
| ScrollBar horizontalBar = getHorizontalBar(); |
| |
| wordWrap = wrap; |
| if (wordWrap) { |
| logicalContent = content; |
| content = new WrappedContent(renderer, logicalContent); |
| } |
| else { |
| content = logicalContent; |
| } |
| calculateContentWidth(); |
| horizontalScrollOffset = 0; |
| if (horizontalBar != null) { |
| horizontalBar.setVisible(!wordWrap); |
| } |
| setScrollBars(); |
| setCaretLocation(); |
| 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(); |
| } |
| } |
| /** |
| * @see org.eclipse.swt.widgets.Control#setBackground |
| */ |
| public void setBackground(Color color) { |
| checkWidget(); |
| background = color; |
| super.setBackground(getBackground()); |
| redraw(); |
| } |
| /** |
| * 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> |
| * <p> |
| * @deprecated use BidiSegmentListener instead. |
| * </p> |
| */ |
| public void setBidiColoring(boolean mode) { |
| checkWidget(); |
| bidiColoring = mode; |
| } |
| void setCaretLocation(int newCaretX, int line, int direction) { |
| Caret caret = getCaret(); |
| if (caret != null) { |
| boolean updateImage = caret == defaultCaret; |
| int imageDirection = direction; |
| if (isMirrored()) { |
| if (imageDirection == SWT.LEFT) { |
| imageDirection = SWT.RIGHT; |
| } else if (imageDirection == SWT.RIGHT) { |
| imageDirection = SWT.LEFT; |
| } |
| } |
| if (updateImage && imageDirection == SWT.RIGHT) { |
| newCaretX -= (caret.getSize().x - 1); |
| } |
| int newCaretY = line * lineHeight - verticalScrollOffset + topMargin; |
| caret.setLocation(newCaretX, newCaretY); |
| getAccessible().textCaretMoved(getCaretOffset()); |
| if (direction != caretDirection) { |
| caretDirection = direction; |
| if (updateImage) { |
| if (imageDirection == SWT.DEFAULT) { |
| defaultCaret.setImage(null); |
| } else if (imageDirection == SWT.LEFT) { |
| defaultCaret.setImage(leftCaretBitmap); |
| } else if (imageDirection == SWT.RIGHT) { |
| defaultCaret.setImage(rightCaretBitmap); |
| } |
| } |
| caret.setSize(caret.getSize().x, lineHeight); |
| if (caretDirection == SWT.LEFT) { |
| BidiUtil.setKeyboardLanguage(BidiUtil.KEYBOARD_NON_BIDI); |
| } else if (caretDirection == SWT.RIGHT) { |
| BidiUtil.setKeyboardLanguage(BidiUtil.KEYBOARD_BIDI); |
| } |
| } |
| } |
| columnX = newCaretX; |
| } |
| /** |
| * Moves the Caret to the current caret offset. |
| */ |
| void setCaretLocation() { |
| int lineIndex = getCaretLine(); |
| String line = content.getLine(lineIndex); |
| int lineOffset = content.getOffsetAtLine(lineIndex); |
| int offsetInLine = caretOffset - lineOffset; |
| int newCaretX = getXAtOffset(line, lineIndex, offsetInLine); |
| setCaretLocation(newCaretX, lineIndex, getCaretDirection()); |
| } |
| /** |
| * 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); |
| } |
| // always update the caret location. fixes 1G8FODP |
| setCaretLocation(); |
| } |
| /** |
| * Copies the specified text range to the clipboard. The text will be placed |
| * in the clipboard in plain text format and RTF format. |
| * <p> |
| * |
| * @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. |
| * <p> |
| * |
| * @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); |
| } |
| logicalContent = newContent; |
| if (wordWrap) { |
| content = new WrappedContent(renderer, logicalContent); |
| } |
| else { |
| content = logicalContent; |
| } |
| 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) { |
| super.setCursor(ibeamCursor); |
| } 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 = lineHeight; |
| |
| super.setFont(font); |
| initializeRenderer(); |
| // keep the same top line visible. fixes 5815 |
| if (lineHeight != oldLineHeight) { |
| setVerticalScrollOffset(verticalScrollOffset * lineHeight / oldLineHeight, true); |
| claimBottomFreeSpace(); |
| } |
| calculateContentWidth(); |
| calculateScrollBars(); |
| if (isBidiCaret()) createCaretBitmaps(); |
| caretDirection = SWT.NULL; |
| // always set the caret location. Fixes 6685 |
| setCaretLocation(); |
| super.redraw(); |
| } |
| /** |
| * @see org.eclipse.swt.widgets.Control#setForeground |
| */ |
| public void setForeground(Color color) { |
| checkWidget(); |
| foreground = color; |
| super.setForeground(getForeground()); |
| 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(); |
| int clientAreaWidth = getClientArea().width; |
| 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 = lineCache.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); |
| } |
| } |
| scrollHorizontalBar(offset - horizontalScrollOffset); |
| } |
| /** |
| * 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(); |
| int clientAreaWidth = getClientArea().width; |
| 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 = lineCache.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); |
| } |
| } |
| scrollHorizontalBar(pixel - horizontalScrollOffset); |
| } |
| /** |
| * Adjusts the maximum and the page size of the horizontal scroll bar |
| * to reflect content width changes. |
| */ |
| void setHorizontalScrollBar() { |
| ScrollBar horizontalBar = getHorizontalBar(); |
| |
| if (horizontalBar != null && horizontalBar.getVisible()) { |
| final int INACTIVE = 1; |
| Rectangle clientArea = getClientArea(); |
| // 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 (clientArea.width < lineCache.getWidth()) { |
| horizontalBar.setValues( |
| horizontalBar.getSelection(), |
| horizontalBar.getMinimum(), |
| lineCache.getWidth(), // maximum |
| clientArea.width - leftMargin - rightMargin, // thumb size |
| horizontalBar.getIncrement(), |
| clientArea.width - 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 background color of the specified lines. |
| * 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. Should not be called if a LineBackgroundListener |
| * has been set since the listener maintains the line backgrounds. |
| * <p> |
| * Line background colors 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 |
| * background colors 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 |
| * background takes precedence and the color of the bottom line is deleted. |
| * For all other text changes line background colors 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(); |
| int partialBottomIndex = getPartialBottomIndex(); |
| |
| // this API can not be used if the client is providing the line background |
| if (userLineBackground) { |
| return; |
| } |
| if (startLine < 0 || startLine + lineCount > logicalContent.getLineCount()) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| defaultLineStyler.setLineBackground(startLine, lineCount, background); |
| // do nothing if redraw range is completely invisible |
| 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; |
| super.redraw( |
| leftMargin, startLine * lineHeight + topMargin, |
| getClientArea().width - leftMargin - rightMargin, lineCount * lineHeight, true); |
| } |
| /** |
| * Flips selection anchor based on word selection direction. |
| */ |
| void setMouseWordSelectionAnchor() { |
| if (mouseDoubleClick == false) { |
| return; |
| } |
| 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>. |
| * <p> |
| * |
| * @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() == false) { |
| return; |
| } |
| if (BidiUtil.setOrientation(handle, orientation) == false) { |
| return; |
| } |
| isMirrored = (orientation & SWT.RIGHT_TO_LEFT) != 0; |
| initializeRenderer(); |
| 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. |
| */ |
| void setScrollBars() { |
| ScrollBar verticalBar = getVerticalBar(); |
| |
| if (verticalBar != null) { |
| Rectangle clientArea = getClientArea(); |
| final int INACTIVE = 1; |
| int maximum = content.getLineCount() * getVerticalIncrement(); |
| |
| // 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 (clientArea.height < maximum) { |
| verticalBar.setValues( |
| verticalBar.getSelection(), |
| verticalBar.getMinimum(), |
| maximum, |
| clientArea.height, // thumb size |
| verticalBar.getIncrement(), |
| clientArea.height); // page size |
| } |
| else |
| if (verticalBar.getThumb() != INACTIVE || verticalBar.getMaximum() != INACTIVE) { |
| verticalBar.setValues( |
| verticalBar.getSelection(), |
| verticalBar.getMinimum(), |
| INACTIVE, |
| INACTIVE, |
| verticalBar.getIncrement(), |
| INACTIVE); |
| } |
| } |
| setHorizontalScrollBar(); |
| } |
| /** |
| * Sets the selection to the given position and scrolls it into view. Equivalent to setSelection(start,start). |
| * <p> |
| * |
| * @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; |
| 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; |
| 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) { |
| // checkWidget test done in setSelectionRange |
| setSelectionRange(start, end - start); |
| showSelection(); |
| } |
| /** |
| * Sets the selection. 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); |
| } |
| internalSetSelection(start, length, false); |
| // always update the caret location. fixes 1G8FODP |
| setCaretLocation(); |
| } |
| /** |
| * Sets the selection. |
| * 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 internalSetSelection(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, true); |
| } |
| } |
| /** |
| * Adds the specified style. 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> |
| * 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(); |
| |
| // this API can not be used if the client is providing the line styles |
| if (userLineStyle) { |
| return; |
| } |
| // check the range, make sure it falls within the range of the text |
| if (range != null && range.start + range.length > content.getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| defaultLineStyler.setStyleRange(range); |
| if (range != null) { |
| int firstLine = content.getLineAtOffset(range.start); |
| int lastLine = content.getLineAtOffset(range.start + range.length); |
| lineCache.reset(firstLine, lastLine - firstLine + 1, true); |
| |
| // if the style is not visible, there is no need to redraw |
| if (isAreaVisible(firstLine, lastLine)) { |
| int redrawY = firstLine * lineHeight - verticalScrollOffset; |
| int redrawStopY = (lastLine + 1) * lineHeight - verticalScrollOffset; |
| draw(0, redrawY, getClientArea().width, redrawStopY - redrawY, true); |
| } |
| } else { |
| // clearing all styles |
| lineCache.reset(0, content.getLineCount(), false); |
| redraw(); |
| } |
| |
| // make sure that the caret is positioned correctly. |
| // caret location may change if font style changes. |
| // fixes 1G8FODP |
| 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> |
| * 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 listener is null</li> |
| * <li>ERROR_INVALID_RANGE when the last of the style ranges is outside the valid range (> getCharCount())</li> |
| * </ul> |
| */ |
| public void setStyleRanges(StyleRange[] ranges) { |
| checkWidget(); |
| // this API can not be used if the client is providing the line styles |
| if (userLineStyle) { |
| return; |
| } |
| if (ranges == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| // check the last range, make sure it falls within the range of the |
| // current text |
| if (ranges.length != 0) { |
| StyleRange last = ranges[ranges.length-1]; |
| int lastEnd = last.start + last.length; |
| int firstLine = content.getLineAtOffset(ranges[0].start); |
| int lastLine; |
| if (lastEnd > content.getCharCount()) { |
| SWT.error(SWT.ERROR_INVALID_RANGE); |
| } |
| lastLine = content.getLineAtOffset(lastEnd); |
| // reset all lines affected by the style change |
| lineCache.reset(firstLine, lastLine - firstLine + 1, true); |
| } |
| else { |
| // reset all lines |
| lineCache.reset(0, content.getLineCount(), false); |
| } |
| defaultLineStyler.setStyleRanges(ranges); |
| redraw(); // should only redraw affected area to avoid flashing |
| // make sure that the caret is positioned correctly. |
| // caret location may change if font style changes. |
| // fixes 1G8FODP |
| setCaretLocation(); |
| } |
| /** |
| * Sets the tab width. |
| * <p> |
| * |
| * @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.setTabLength(tabLength); |
| if (caretOffset > 0) { |
| caretOffset = 0; |
| showCaret(); |
| clearSelection(false); |
| } |
| // reset all line widths when the tab width changes |
| lineCache.reset(0, content.getLineCount(), false); |
| 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(); |
| Event event = new Event(); |
| |
| if (text == null) { |
| SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| } |
| 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(logicalContent); |
| 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(); |
| int lineCount = logicalContent.getLineCount(); |
| int pageSize = Math.max(1, Math.min(lineCount, getLineCountWhole())); |
| |
| if (getCharCount() == 0) { |
| return; |
| } |
| if (topIndex < 0) { |
| topIndex = 0; |
| } |
| else |
| if (topIndex > lineCount - pageSize) { |
| topIndex = lineCount - pageSize; |
| } |
| if (wordWrap) { |
| int logicalLineOffset = logicalContent.getOffsetAtLine(topIndex); |
| topIndex = content.getLineAtOffset(logicalLineOffset); |
| } |
| setVerticalScrollOffset(topIndex * getVerticalIncrement(), 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(); |
| int lineCount =content.getLineCount(); |
| int height = getClientArea().height; |
| int maxTopPixel = Math.max(0, lineCount * getVerticalIncrement() - height); |
| |
| if (getCharCount() == 0) { |
| return; |
| } |
| if (pixel < 0) { |
| pixel = 0; |
| } |
| else |
| if (pixel > maxTopPixel) { |
| pixel = maxTopPixel; |
| } |
| setVerticalScrollOffset(pixel, true); |
| } |
| /** |
| * Scrolls the widget vertically. |
| * <p> |
| * |
| * @param pixelOffset 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, the given offset is not valid. |
| */ |
| boolean setVerticalScrollOffset(int pixelOffset, boolean adjustScrollBar) { |
| Rectangle clientArea; |
| ScrollBar verticalBar = getVerticalBar(); |
| |
| if (pixelOffset == verticalScrollOffset) { |
| return false; |
| } |
| if (verticalBar != null && adjustScrollBar) { |
| verticalBar.setSelection(pixelOffset); |
| } |
| clientArea = getClientArea(); |
| scroll( |
| 0, 0, // destination x, y |
| 0, pixelOffset - verticalScrollOffset, // source x, y |
| clientArea.width, clientArea.height, true); |
| |
| verticalScrollOffset = pixelOffset; |
| calculateTopIndex(); |
| int oldColumnX = columnX; |
| setCaretLocation(); |
| // restore the original horizontal caret index |
| columnX = oldColumnX; |
| return true; |
| } |
| /** |
| * Scrolls the specified location into view. |
| * <p> |
| * |
| * @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(int x, int line) { |
| int clientAreaWidth = getClientArea().width - leftMargin; |
| int verticalIncrement = getVerticalIncrement(); |
| int horizontalIncrement = clientAreaWidth / 4; |
| boolean scrolled = false; |
| |
| if (x < leftMargin) { |
| // always make 1/4 of a page visible |
| x = Math.max(horizontalScrollOffset * -1, x - horizontalIncrement); |
| scrolled = scrollHorizontalBar(x); |
| } |
| else |
| if (x >= clientAreaWidth) { |
| // always make 1/4 of a page visible |
| x = Math.min(lineCache.getWidth() - horizontalScrollOffset, x + horizontalIncrement); |
| scrolled = scrollHorizontalBar(x - clientAreaWidth); |
| } |
| if (line < topIndex) { |
| scrolled = setVerticalScrollOffset(line * verticalIncrement, true); |
| } |
| else |
| if (line > getBottomIndex()) { |
| scrolled = setVerticalScrollOffset((line + 1) * verticalIncrement - getClientArea().height, true); |
| } |
| return scrolled; |
| } |
| /** |
| * Sets the caret location and scrolls the caret offset into view. |
| */ |
| void showCaret() { |
| int caretLine = content.getLineAtOffset(caretOffset); |
| |
| showCaret(caretLine); |
| } |
| /** |
| * Sets the caret location and scrolls the caret offset into view. |
| */ |
| void showCaret(int caretLine) { |
| int lineOffset = content.getOffsetAtLine(caretLine); |
| String line = content.getLine(caretLine); |
| int offsetInLine = caretOffset - lineOffset; |
| int newCaretX = getXAtOffset(line, caretLine, offsetInLine); |
| boolean scrolled = showLocation(newCaretX, caretLine); |
| boolean setWrapCaretLocation = false; |
| Caret caret = getCaret(); |
| |
| if (wordWrap && caret != null) { |
| int caretY = caret.getLocation().y; |
| if ((caretY + verticalScrollOffset) / getVerticalIncrement() - 1 != caretLine) { |
| setWrapCaretLocation = true; |
| } |
| } |
| if (scrolled == false || setWrapCaretLocation) { |
| // set the caret location if a scroll operation did not set it (as a |
| // sideeffect of scrolling) or when in word wrap mode and the caret |
| // line was explicitly specified (i.e., because getWrapCaretLine does |
| // not return the desired line causing scrolling to not set it correctly) |
| setCaretLocation(newCaretX, caretLine, getCaretDirection()); |
| } |
| } |
| /** |
| * Scrolls the specified offset into view. |
| * <p> |
| * |
| * @param offset offset that should be scolled into view |
| */ |
| void showOffset(int offset) { |
| int line = content.getLineAtOffset(offset); |
| int lineOffset = content.getOffsetAtLine(line); |
| int offsetInLine = offset - lineOffset; |
| String lineText = content.getLine(line); |
| int xAtOffset = getXAtOffset(lineText, line, offsetInLine); |
| |
| showLocation(xAtOffset, line); |
| } |
| /** |
| /** |
| * Scrolls the selection into view. 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(); |
| boolean selectionFits; |
| int startOffset, startLine, startX, endOffset, endLine, endX, offsetInLine; |
| |
| // is selection from right-to-left? |
| boolean rightToLeft = caretOffset == selection.x; |
| |
| if (rightToLeft) { |
| startOffset = selection.y; |
| endOffset = selection.x; |
| } else { |
| startOffset = selection.x; |
| endOffset = selection.y; |
| } |
| |
| // calculate the logical start and end values for the selection |
| startLine = content.getLineAtOffset(startOffset); |
| offsetInLine = startOffset - content.getOffsetAtLine(startLine); |
| startX = getXAtOffset(content.getLine(startLine), startLine, offsetInLine); |
| endLine = content.getLineAtOffset(endOffset); |
| offsetInLine = endOffset - content.getOffsetAtLine(endLine); |
| endX = getXAtOffset(content.getLine(endLine), endLine, offsetInLine); |
| |
| // can the selection be fully displayed within the widget's visible width? |
| int w = getClientArea().width; |
| if (rightToLeft) { |
| selectionFits = startX - endX <= w; |
| } else { |
| selectionFits = endX - startX <= w; |
| } |
| |
| if (selectionFits) { |
| // show as much of the selection as possible by first showing |
| // the start of the selection |
| showLocation(startX, startLine); |
| // endX value could change if showing startX caused a scroll to occur |
| endX = getXAtOffset(content.getLine(endLine), endLine, offsetInLine); |
| showLocation(endX, endLine); |
| } else { |
| // just show the end of the selection since the selection start |
| // will not be visible |
| showLocation(endX, endLine); |
| } |
| } |
| boolean isBidiCaret() { |
| return BidiUtil.isBidiPlatform(); |
| } |
| /** |
| * Updates the selection and caret position depending on the text change. |
| * 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, true); |
| } |
| 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, true); |
| } |
| if (selection.y > startOffset && selection.x < startOffset + replacedLength) { |
| // selection intersects replaced text. set caret behind text change |
| internalSetSelection(startOffset + newLength, 0, true); |
| // always update the caret location. fixes 1G8FODP |
| setCaretLocation(); |
| } |
| else { |
| // move selection to keep same text selected |
| internalSetSelection(selection.x + newLength - replacedLength, selection.y - selection.x, true); |
| // always update the caret location. fixes 1G8FODP |
| setCaretLocation(); |
| } |
| } |
| /** |
| * Rewraps all lines |
| * <p> |
| * |
| * @param oldClientAreaWidth client area width before resize |
| * occurred |
| */ |
| void wordWrapResize(int oldClientAreaWidth) { |
| WrappedContent wrappedContent = (WrappedContent) content; |
| int newTopIndex; |
| |
| // all lines are wrapped and no rewrap required if widget has already |
| // been visible, client area is now wider and visual (wrapped) line |
| // count equals logical line count. |
| if (oldClientAreaWidth != 0 && clientAreaWidth > oldClientAreaWidth && |
| wrappedContent.getLineCount() == logicalContent.getLineCount()) { |
| return; |
| } |
| wrappedContent.wrapLines(); |
| |
| // adjust the top index so that top line remains the same |
| newTopIndex = content.getLineAtOffset(topOffset); |
| // topOffset is the beginning of the top line. therefore it |
| // needs to be adjusted because in a wrapped line this is also |
| // the end of the preceeding line. |
| if (newTopIndex < content.getLineCount() - 1 && |
| topOffset == content.getOffsetAtLine(newTopIndex + 1)) { |
| newTopIndex++; |
| } |
| if (newTopIndex != topIndex) { |
| ScrollBar verticalBar = getVerticalBar(); |
| // adjust index and pixel offset manually instead of calling |
| // setVerticalScrollOffset because the widget does not actually need |
| // to be scrolled. causes flash otherwise. |
| verticalScrollOffset += (newTopIndex - topIndex) * getVerticalIncrement(); |
| // verticalScrollOffset may become negative if first line was |
| // partially visible and second line was top line. prevent this from |
| // happening to fix 8503. |
| if (verticalScrollOffset < 0) { |
| verticalScrollOffset = 0; |
| } |
| topIndex = newTopIndex; |
| topOffset = content.getOffsetAtLine(topIndex); |
| if (verticalBar != null) { |
| verticalBar.setSelection(verticalScrollOffset); |
| } |
| } |
| // caret may be on a different line after a rewrap. |
| // call setCaretLocation after fixing vertical scroll offset. |
| setCaretLocation(); |
| // word wrap may have changed on one of the visible lines |
| super.redraw(); |
| } |
| } |