bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Link.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2009 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
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class Link extends Control {
 	NSScrollView scrollView;
 	String text;
 	Point [] offsets;
 	Point selection;
 	String [] ids;
 	int [] mnemonics;
 	NSColor linkColor;

 /**
  * 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 textView_clickOnLink_atIndex(int /*long*/ id, int /*long*/ sel, int /*long*/ textView, int /*long*/ link, int /*long*/ charIndex) {
 	NSString str = new NSString (link);
 	Event event = new Event ();
 	event.text = str.getString();
 	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;

 	// TODO is this true?  if so, can this rounding be turned off?
 	/*
 	 * Bug in Cocoa.  NSTextStorage.size() seems to return a width
 	 * value that is rounded down, because its result is never
 	 * fractional.  The workaround is to increment width by 1
 	 * to ensure that it is wide enough to show the full text.
 	 */
 	width += 1;
 	return new Point (width, height);
 }

 void createHandle () {
 	state |= THEME_BACKGROUND;
 	NSScrollView scrollWidget = (NSScrollView)new SWTScrollView().alloc();
 	scrollWidget.init();
 	scrollWidget.setDrawsBackground(false);
 	scrollWidget.setBorderType(hasBorder() ? OS.NSBezelBorder : OS.NSNoBorder);

 	NSTextView widget = (NSTextView)new SWTTextView().alloc();
 	widget.init();
 	widget.setEditable(false);
 	widget.setDrawsBackground(false);
 	widget.setDelegate(widget);
 	widget.setAutoresizingMask (OS.NSViewWidthSizable | OS.NSViewHeightSizable);
 	widget.textContainer().setLineFragmentPadding(0);

 	scrollView = scrollWidget;
 	view = widget;
 }

 void createWidget () {
 	super.createWidget ();
 	text = "";
 	NSDictionary dict = ((NSTextView)view).linkTextAttributes();
 	linkColor = new NSColor(dict.valueForKey(OS.NSForegroundColorAttributeName));
 }

 NSFont defaultNSFont () {
 	return display.textViewFont;
 }

 void deregister () {
 	super.deregister ();
 	if (scrollView != null) display.removeWidget (scrollView);
 }

 void enableWidget (boolean enabled) {
 	super.enableWidget (enabled);
 	NSColor nsColor = null;
 	if (enabled) {
 		if (foreground == null) {
 			nsColor = NSColor.textColor ();
 		} else {
 			nsColor = NSColor.colorWithDeviceRed (foreground [0], foreground [1], foreground [2], foreground[3]);
 		}
 	} else {
 		nsColor = NSColor.disabledControlTextColor();
 	}
 	NSTextView widget = (NSTextView)view;
 	widget.setTextColor(nsColor);
 	NSDictionary linkTextAttributes = widget.linkTextAttributes();
 	int count = (int)/*64*/linkTextAttributes.count();
 	NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity(count);
 	dict.setDictionary(linkTextAttributes);
 	dict.setValue(enabled ? linkColor : nsColor, OS.NSForegroundColorAttributeName);
 	widget.setLinkTextAttributes(dict);
 }

 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 register () {
 	super.register ();
 	if (scrollView != null) display.addWidget (scrollView, this);
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	offsets = null;
 	ids = null;
 	mnemonics = null;
 	text = null;
 	linkColor = 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;
 }

 void updateBackground () {
 	NSColor nsColor = null;
 	if (backgroundImage != null) {
 		nsColor = NSColor.colorWithPatternImage(backgroundImage.handle);
 	} else if (background != null) {
 		nsColor = NSColor.colorWithDeviceRed(background[0], background[1], background[2], background[3]);
 	}
 	setBackground(nsColor);
 }

 void setBackground(NSColor nsColor) {
 	NSTextView widget = (NSTextView)view;
 	if (nsColor == null) {
 		widget.setDrawsBackground(false);
 	} else {
 		widget.setDrawsBackground(true);
 		widget.setBackgroundColor (nsColor);
 	}
 }

 void setFont(NSFont font) {
 	((NSTextView) view).setFont(font);
 }

 void setForeground (float /*double*/ [] color) {
 	if (!getEnabled ()) return;
 	NSColor nsColor;
 	if (color == null) {
 		nsColor = NSColor.textColor ();
 	} else {
 		nsColor = NSColor.colorWithDeviceRed (color [0], color [1], color [2], 1);
 	}
 	((NSTextView) view).setTextColor (nsColor);
 }

 /**
  * Sets the receiver's text.
  * <p>
  * The string can contain both regular text and hyperlinks.  A hyperlink
  * is delimited by an anchor tag, &lt;A&gt; and &lt;/A&gt;.  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 attribute can be used to distinguish between them.  The string may
  * include the mnemonic character and line delimiters. The only delimiter
  * the HREF attribute supports is the quotation mark (").
  * </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);
 	}
 }

 void setZOrder () {
 	super.setZOrder ();
 	if (scrollView != null) scrollView.setDocumentView (view);
 }

 NSView topView () {
 	return scrollView;
 }

 void updateCursorRects (boolean enabled) {
 	super.updateCursorRects (enabled);
 	if (scrollView == null) return;
 	updateCursorRects (enabled, scrollView);
 	NSClipView contentView = scrollView.contentView ();
 	updateCursorRects (enabled, contentView);
 	contentView.setDocumentCursor (enabled ? NSCursor.IBeamCursor () : null);
 }

 //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;
 //}

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2009 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
	* @noextend This class is not intended to be subclassed by clients.
	*/
	public class Link extends Control {
	NSScrollView scrollView;
	String text;
	Point [] offsets;
	Point selection;
	String [] ids;
	int [] mnemonics;
	NSColor linkColor;

	/**
	* 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 textView_clickOnLink_atIndex(int /long/ id, int /long/ sel, int /long/ textView, int /long/ link, int /long/ charIndex) {
	NSString str = new NSString (link);
	Event event = new Event ();
	event.text = str.getString();
	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;

	// TODO is this true? if so, can this rounding be turned off?
	/*
	* Bug in Cocoa. NSTextStorage.size() seems to return a width
	* value that is rounded down, because its result is never
	* fractional. The workaround is to increment width by 1
	* to ensure that it is wide enough to show the full text.
	*/
	width += 1;
	return new Point (width, height);
	}

	void createHandle () {
	state \|= THEME_BACKGROUND;
	NSScrollView scrollWidget = (NSScrollView)new SWTScrollView().alloc();
	scrollWidget.init();
	scrollWidget.setDrawsBackground(false);
	scrollWidget.setBorderType(hasBorder() ? OS.NSBezelBorder : OS.NSNoBorder);

	NSTextView widget = (NSTextView)new SWTTextView().alloc();
	widget.init();
	widget.setEditable(false);
	widget.setDrawsBackground(false);
	widget.setDelegate(widget);
	widget.setAutoresizingMask (OS.NSViewWidthSizable \| OS.NSViewHeightSizable);
	widget.textContainer().setLineFragmentPadding(0);

	scrollView = scrollWidget;
	view = widget;
	}

	void createWidget () {
	super.createWidget ();
	text = "";
	NSDictionary dict = ((NSTextView)view).linkTextAttributes();
	linkColor = new NSColor(dict.valueForKey(OS.NSForegroundColorAttributeName));
	}

	NSFont defaultNSFont () {
	return display.textViewFont;
	}

	void deregister () {
	super.deregister ();
	if (scrollView != null) display.removeWidget (scrollView);
	}

	void enableWidget (boolean enabled) {
	super.enableWidget (enabled);
	NSColor nsColor = null;
	if (enabled) {
	if (foreground == null) {
	nsColor = NSColor.textColor ();
	} else {
	nsColor = NSColor.colorWithDeviceRed (foreground [0], foreground [1], foreground [2], foreground[3]);
	}
	} else {
	nsColor = NSColor.disabledControlTextColor();
	}
	NSTextView widget = (NSTextView)view;
	widget.setTextColor(nsColor);
	NSDictionary linkTextAttributes = widget.linkTextAttributes();
	int count = (int)/64/linkTextAttributes.count();
	NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity(count);
	dict.setDictionary(linkTextAttributes);
	dict.setValue(enabled ? linkColor : nsColor, OS.NSForegroundColorAttributeName);
	widget.setLinkTextAttributes(dict);
	}

	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 register () {
	super.register ();
	if (scrollView != null) display.addWidget (scrollView, this);
	}

	void releaseWidget () {
	super.releaseWidget ();
	offsets = null;
	ids = null;
	mnemonics = null;
	text = null;
	linkColor = 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;
	}

	void updateBackground () {
	NSColor nsColor = null;
	if (backgroundImage != null) {
	nsColor = NSColor.colorWithPatternImage(backgroundImage.handle);
	} else if (background != null) {
	nsColor = NSColor.colorWithDeviceRed(background[0], background[1], background[2], background[3]);
	}
	setBackground(nsColor);
	}

	void setBackground(NSColor nsColor) {
	NSTextView widget = (NSTextView)view;
	if (nsColor == null) {
	widget.setDrawsBackground(false);
	} else {
	widget.setDrawsBackground(true);
	widget.setBackgroundColor (nsColor);
	}
	}

	void setFont(NSFont font) {
	((NSTextView) view).setFont(font);
	}

	void setForeground (float /double/ [] color) {
	if (!getEnabled ()) return;
	NSColor nsColor;
	if (color == null) {
	nsColor = NSColor.textColor ();
	} else {
	nsColor = NSColor.colorWithDeviceRed (color [0], color [1], color [2], 1);
	}
	((NSTextView) view).setTextColor (nsColor);
	}

	/**
	* 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 attribute can be used to distinguish between them. The string may
	* include the mnemonic character and line delimiters. The only delimiter
	* the HREF attribute supports is the quotation mark (").
	* </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);
	}
	}

	void setZOrder () {
	super.setZOrder ();
	if (scrollView != null) scrollView.setDocumentView (view);
	}

	NSView topView () {
	return scrollView;
	}

	void updateCursorRects (boolean enabled) {
	super.updateCursorRects (enabled);
	if (scrollView == null) return;
	updateCursorRects (enabled, scrollView);
	NSClipView contentView = scrollView.contentView ();
	updateCursorRects (enabled, contentView);
	contentView.setDocumentCursor (enabled ? NSCursor.IBeamCursor () : null);
	}

	//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;
	//}

	}