| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.widgets; |
| |
| import org.eclipse.swt.internal.cocoa.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class represent a selectable |
| * user interface object that displays a text with |
| * links. |
| * <p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#link">Link snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.1 |
| */ |
| public class Link extends Control { |
| NSScrollView scrollView; |
| String text; |
| Point [] offsets; |
| Point selection; |
| String [] ids; |
| int [] mnemonics; |
| |
| /** |
| * 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 composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control 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> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Link (Composite parent, int style) { |
| super (parent, style); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the control is selected by the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is called when the control is selected by the user. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * |
| * @param listener the listener which should be notified |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</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> |
| * |
| * @see SelectionListener |
| * @see #removeSelectionListener |
| * @see SelectionEvent |
| */ |
| public void addSelectionListener (SelectionListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Selection, typedListener); |
| addListener (SWT.DefaultSelection, typedListener); |
| } |
| |
| boolean clickOnLink(int textView, int link, int charIndex) { |
| NSString str = new NSString (link); |
| char [] buffer = new char [str.length ()]; |
| str.getCharacters_ (buffer); |
| Event event = new Event (); |
| event.text = new String (buffer); |
| sendEvent (SWT.Selection, event); |
| return true; |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0; |
| if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0; |
| int width, height; |
| //TODO wrapping, wHint |
| int borderStyle = hasBorder() ? OS.NSBezelBorder : OS.NSNoBorder; |
| NSSize borderSize = NSScrollView.frameSizeForContentSize(new NSSize(), false, false, borderStyle); |
| NSTextView widget = (NSTextView)view; |
| NSSize size = widget.textStorage().size(); |
| width = (int)(size.width + borderSize.width); |
| height = (int)(size.height + borderSize.height); |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| int border = getBorderWidth (); |
| width += border * 2; |
| height += border * 2; |
| return new Point (width, height); |
| } |
| |
| void createHandle () { |
| SWTScrollView scrollWidget = (SWTScrollView)new SWTScrollView().alloc(); |
| scrollWidget.initWithFrame(new NSRect ()); |
| scrollWidget.setDrawsBackground(false); |
| scrollWidget.setBorderType(hasBorder() ? OS.NSBezelBorder : OS.NSNoBorder); |
| scrollWidget.setTag(jniRef); |
| |
| SWTTextView widget = (SWTTextView)new SWTTextView().alloc(); |
| widget.initWithFrame(new NSRect()); |
| widget.setEditable(false); |
| widget.setDrawsBackground(false); |
| widget.setDelegate(widget); |
| widget.setAutoresizingMask (OS.NSViewWidthSizable | OS.NSViewHeightSizable); |
| widget.setTag(jniRef); |
| widget.textContainer().setLineFragmentPadding(0); |
| |
| scrollView = scrollWidget; |
| view = widget; |
| scrollView.addSubview_(view); |
| scrollView.setDocumentView(view); |
| parent.contentView().addSubview_(scrollView); |
| } |
| |
| void createWidget () { |
| super.createWidget (); |
| text = ""; |
| } |
| |
| String getNameText () { |
| return getText (); |
| } |
| |
| |
| /** |
| * Returns the receiver's text, which will be an empty |
| * string if it has never been set. |
| * |
| * @return the receiver's 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 String getText () { |
| checkWidget (); |
| return text; |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| offsets = null; |
| ids = null; |
| mnemonics = null; |
| text = null; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected by the user. |
| * |
| * @param listener the listener which should no longer be notified |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</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> |
| * |
| * @see SelectionListener |
| * @see #addSelectionListener |
| */ |
| public void removeSelectionListener (SelectionListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Selection, listener); |
| eventTable.unhook (SWT.DefaultSelection, listener); |
| } |
| |
| String parse (String string) { |
| int length = string.length (); |
| offsets = new Point [length / 4]; |
| ids = new String [length / 4]; |
| mnemonics = new int [length / 4 + 1]; |
| StringBuffer result = new StringBuffer (); |
| char [] buffer = new char [length]; |
| string.getChars (0, string.length (), buffer, 0); |
| int index = 0, state = 0, linkIndex = 0; |
| int start = 0, tagStart = 0, linkStart = 0, endtagStart = 0, refStart = 0; |
| while (index < length) { |
| char c = Character.toLowerCase (buffer [index]); |
| switch (state) { |
| case 0: |
| if (c == '<') { |
| tagStart = index; |
| state++; |
| } |
| break; |
| case 1: |
| if (c == 'a') state++; |
| break; |
| case 2: |
| switch (c) { |
| case 'h': |
| state = 7; |
| break; |
| case '>': |
| linkStart = index + 1; |
| state++; |
| break; |
| default: |
| if (Character.isWhitespace(c)) break; |
| else state = 13; |
| } |
| break; |
| case 3: |
| if (c == '<') { |
| endtagStart = index; |
| state++; |
| } |
| break; |
| case 4: |
| state = c == '/' ? state + 1 : 3; |
| break; |
| case 5: |
| state = c == 'a' ? state + 1 : 3; |
| break; |
| case 6: |
| if (c == '>') { |
| mnemonics [linkIndex] = parseMnemonics (buffer, start, tagStart, result); |
| int offset = result.length (); |
| parseMnemonics (buffer, linkStart, endtagStart, result); |
| offsets [linkIndex] = new Point (offset, result.length () - 1); |
| if (ids [linkIndex] == null) { |
| ids [linkIndex] = new String (buffer, linkStart, endtagStart - linkStart); |
| } |
| linkIndex++; |
| start = tagStart = linkStart = endtagStart = refStart = index + 1; |
| state = 0; |
| } else { |
| state = 3; |
| } |
| break; |
| case 7: |
| state = c == 'r' ? state + 1 : 0; |
| break; |
| case 8: |
| state = c == 'e' ? state + 1 : 0; |
| break; |
| case 9: |
| state = c == 'f' ? state + 1 : 0; |
| break; |
| case 10: |
| state = c == '=' ? state + 1 : 0; |
| break; |
| case 11: |
| if (c == '"') { |
| state++; |
| refStart = index + 1; |
| } else { |
| state = 0; |
| } |
| break; |
| case 12: |
| if (c == '"') { |
| ids[linkIndex] = new String (buffer, refStart, index - refStart); |
| state = 2; |
| } |
| break; |
| case 13: |
| if (Character.isWhitespace (c)) { |
| state = 0; |
| } else if (c == '='){ |
| state++; |
| } |
| break; |
| case 14: |
| state = c == '"' ? state + 1 : 0; |
| break; |
| case 15: |
| if (c == '"') state = 2; |
| break; |
| default: |
| state = 0; |
| break; |
| } |
| index++; |
| } |
| if (start < length) { |
| int tmp = parseMnemonics (buffer, start, tagStart, result); |
| int mnemonic = parseMnemonics (buffer, Math.max (tagStart, linkStart), length, result); |
| if (mnemonic == -1) mnemonic = tmp; |
| mnemonics [linkIndex] = mnemonic; |
| } else { |
| mnemonics [linkIndex] = -1; |
| } |
| if (offsets.length != linkIndex) { |
| Point [] newOffsets = new Point [linkIndex]; |
| System.arraycopy (offsets, 0, newOffsets, 0, linkIndex); |
| offsets = newOffsets; |
| String [] newIDs = new String [linkIndex]; |
| System.arraycopy (ids, 0, newIDs, 0, linkIndex); |
| ids = newIDs; |
| int [] newMnemonics = new int [linkIndex + 1]; |
| System.arraycopy (mnemonics, 0, newMnemonics, 0, linkIndex + 1); |
| mnemonics = newMnemonics; |
| } |
| return result.toString (); |
| } |
| |
| int parseMnemonics (char[] buffer, int start, int end, StringBuffer result) { |
| int mnemonic = -1, index = start; |
| while (index < end) { |
| if (buffer [index] == '&') { |
| if (index + 1 < end && buffer [index + 1] == '&') { |
| result.append (buffer [index]); |
| index++; |
| } else { |
| mnemonic = result.length(); |
| } |
| } else { |
| result.append (buffer [index]); |
| } |
| index++; |
| } |
| return mnemonic; |
| } |
| |
| /** |
| * Sets the receiver's text. |
| * <p> |
| * The string can contain both regular text and hyperlinks. A hyperlink |
| * is delimited by an anchor tag, <A> and </A>. Within an |
| * anchor, a single HREF attribute is supported. When a hyperlink is |
| * selected, the text field of the selection event contains either the |
| * text of the hyperlink or the value of its HREF, if one was specified. |
| * In the rare case of identical hyperlinks within the same string, the |
| * HREF tag can be used to distinguish between them. The string may |
| * include the mnemonic character and line delimiters. |
| * </p> |
| * |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text is null</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> |
| */ |
| public void setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (string.equals (text)) return; |
| text = string; |
| NSTextView widget = (NSTextView)view; |
| widget.setString(NSString.stringWith(parse(string))); |
| NSTextStorage textStorage = widget.textStorage(); |
| NSRange range = new NSRange(); |
| for (int i = 0; i < offsets.length; i++) { |
| range.location = offsets[i].x; |
| range.length = offsets[i].y - offsets[i].x + 1; |
| textStorage.addAttribute(OS.NSLinkAttributeName(), NSString.stringWith(ids[i]), range); |
| } |
| } |
| |
| NSView topView () { |
| return scrollView; |
| } |
| |
| //int traversalCode (int key, int theEvent) { |
| // if (offsets.length == 0) return 0; |
| // int bits = super.traversalCode (key, theEvent); |
| // if (key == 48 /* Tab */ && theEvent != 0) { |
| // int [] modifiers = new int [1]; |
| // OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers); |
| // boolean next = (modifiers [0] & OS.shiftKey) == 0; |
| // if (next && focusIndex < offsets.length - 1) { |
| // return bits & ~ SWT.TRAVERSE_TAB_NEXT; |
| // } |
| // if (!next && focusIndex > 0) { |
| // return bits & ~ SWT.TRAVERSE_TAB_PREVIOUS; |
| // } |
| // } |
| // return bits; |
| //} |
| |
| } |