1 files changed, 395 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Label.java b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Label.java
new file mode 100644
index 0000000000..5a475f7e4b
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/Label.java
@@ -0,0 +1,395 @@
+/*******************************************************************************
+ * 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.carbon.ControlFontStyleRec;
+import org.eclipse.swt.internal.carbon.OS;
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+
+/**
+ * Instances of this class represent a non-selectable
+ * user interface object that displays a string or image.
+ * When SEPARATOR is specified, displays a single
+ * vertical or horizontal line.
+ * <p>
+ * Shadow styles are hints and may not be honored
+ * by the platform.  To create a separator label
+ * with the default shadow style for the platform,
+ * do not specify a shadow style.
+ * </p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd>
+ * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
+ * <dd>CENTER, LEFT, RIGHT, WRAP</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * <p>
+ * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified.
+ * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified.
+ * Only one of CENTER, LEFT and RIGHT may be specified.
+ * </p><p>
+ * IMPORTANT: This class is intended to be subclassed <em>only</em>
+ * within the SWT implementation.
+ * </p>
+ *
+ * @see <a href="http://www.eclipse.org/swt/snippets/#label">Label 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>
+ * @noextend This class is not intended to be subclassed by clients.
+ */
+public class Label extends Control {
+	String text = "";
+	Image image;
+	boolean isImage;
+
+/**
+ * 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 SWT#SEPARATOR
+ * @see SWT#HORIZONTAL
+ * @see SWT#VERTICAL
+ * @see SWT#SHADOW_IN
+ * @see SWT#SHADOW_OUT
+ * @see SWT#SHADOW_NONE
+ * @see SWT#CENTER
+ * @see SWT#LEFT
+ * @see SWT#RIGHT
+ * @see SWT#WRAP
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public Label (Composite parent, int style) {
+	super (parent, checkStyle (style));
+}
+
+void addRelation (Control control) {
+	if (!control.isDescribedByLabel ()) return;
+	
+	int labelElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (handle, 0);
+	String string = OS.kAXTitleUIElementAttribute;  // control LabeledBy this
+	char [] buffer = new char [string.length ()];
+	string.getChars (0, buffer.length, buffer, 0);
+	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
+	OS.HIObjectSetAuxiliaryAccessibilityAttribute(control.focusHandle (), 0, stringRef, labelElement);
+	OS.CFRelease(labelElement);
+	OS.CFRelease(stringRef);
+	
+	int relatedElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (control.focusHandle (), 0);
+	int array = OS.CFArrayCreateMutable(OS.kCFAllocatorDefault, 1, 0);
+	OS.CFArrayAppendValue(array, relatedElement);
+	string = OS.kAXServesAsTitleForUIElementsAttribute;  // this LabelFor control
+	buffer = new char [string.length ()];
+	string.getChars (0, buffer.length, buffer, 0);
+	stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
+	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, array);
+	OS.CFRelease(relatedElement);
+	OS.CFRelease(stringRef);
+	OS.CFRelease(array);
+}
+
+static int checkStyle (int style) {
+	style |= SWT.NO_FOCUS;
+	if ((style & SWT.SEPARATOR) != 0) {
+		style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0);
+		return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0);
+	} 
+	return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
+}
+
+public Point computeSize (int wHint, int hHint, boolean changed) {
+	checkWidget();
+	int width = 0, height = 0;
+	if ((style & SWT.SEPARATOR) != 0) {
+		if ((style & SWT.HORIZONTAL) != 0) {
+			width = DEFAULT_WIDTH;
+			height = 3;
+		} else {
+			width = 3;
+			height = DEFAULT_HEIGHT;
+		}
+	} else {
+		if (isImage && image != null) {
+			Rectangle r = image.getBounds ();
+			width = r.width;
+			height = r.height;
+		} else {			
+			int [] ptr = new int [1];
+			OS.GetControlData (handle, (short) 0 , OS.kControlStaticTextCFStringTag, 4, ptr, null);
+			Point size = textExtent (ptr [0], (style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT ? wHint : 0);
+			if (ptr [0] != 0) OS.CFRelease (ptr [0]);
+			width = size.x;
+			height = size.y;			
+		}
+	}
+	if (wHint != SWT.DEFAULT) width = wHint;
+	if (hHint != SWT.DEFAULT) height = hHint;
+	return new Point (width, height);
+}
+
+void createHandle () {
+	state |= GRAB | THEME_BACKGROUND;
+	int [] outControl = new int [1];
+	int window = OS.GetControlOwner (parent.handle);
+	if ((style & SWT.SEPARATOR) != 0) {
+		OS.CreateSeparatorControl (window, null, outControl);
+	} else {
+		int just = OS.teFlushLeft;
+		if ((style & SWT.CENTER) != 0) just = OS.teCenter;
+		if ((style & SWT.RIGHT) != 0) just = OS.teFlushRight;
+		ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
+		fontStyle.flags |= OS.kControlUseJustMask;
+		fontStyle.just = (short) just;
+		OS.CreateStaticTextControl (window, null, 0, fontStyle, outControl);
+	}
+	if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
+	handle = outControl [0];
+	if ((style & SWT.WRAP) == 0) {
+		OS.SetControlData (handle, OS.kControlEntireControl, OS.kControlStaticTextIsMultilineTag, 1, new byte[] {0});
+	}
+}
+
+int defaultThemeFont () {
+	if (display.smallFonts) return OS.kThemeSmallSystemFont;
+	return OS.kThemePushButtonFont;
+}
+
+void drawBackground (int control, int context) {
+	fillBackground (control, context, null);
+}
+
+void drawWidget (int control, int context, int damageRgn, int visibleRgn, int theEvent) {
+	if (isImage && image != null) {
+		GCData data = new GCData ();
+		data.paintEvent = theEvent;
+		data.visibleRgn = visibleRgn;
+		GC gc = GC.carbon_new (this, data);
+		int x = 0;
+		Point size = getSize ();
+		Rectangle bounds = image.getBounds ();
+		if ((style & SWT.CENTER) != 0) x = (size.x - bounds.width) / 2;
+		if ((style & SWT.RIGHT) != 0) x = size.x - bounds.width;
+		gc.drawImage (image, x, 0);
+		gc.dispose ();
+	}
+	super.drawWidget (control, context, damageRgn, visibleRgn, theEvent);
+}
+
+/**
+ * Returns a value which describes the position of the
+ * text or image in the receiver. The value will be one of
+ * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
+ * unless the receiver is a <code>SEPARATOR</code> label, in 
+ * which case, <code>NONE</code> is returned.
+ *
+ * @return the alignment 
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getAlignment () {
+	checkWidget();
+	if ((style & SWT.SEPARATOR) != 0) return SWT.LEFT;
+	if ((style & SWT.CENTER) != 0) return SWT.CENTER;
+	if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
+	return SWT.LEFT;
+}
+
+/**
+ * Returns the receiver's image if it has one, or null
+ * if it does not.
+ *
+ * @return the receiver's image
+ *
+ * @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 Image getImage () {
+	checkWidget();
+	return image;
+}
+
+String getNameText () {
+	return getText ();
+}
+
+/**
+ * Returns the receiver's text, which will be an empty
+ * string if it has never been set or if the receiver is
+ * a <code>SEPARATOR</code> label.
+ *
+ * @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();
+	if ((style & SWT.SEPARATOR) != 0) return "";
+	return text;
+}
+
+boolean isDescribedByLabel () {
+	return false;
+}
+
+/*
+ * Remove "Label for" relations from the receiver.
+ */
+void removeRelation () {
+	String string = OS.kAXServesAsTitleForUIElementsAttribute;
+	char [] buffer = new char [string.length ()];
+	string.getChars (0, buffer.length, buffer, 0);
+	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
+	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, 0);
+	OS.CFRelease(stringRef);
+}
+
+/**
+ * Controls how text and images will be displayed in the receiver.
+ * The argument should be one of <code>LEFT</code>, <code>RIGHT</code>
+ * or <code>CENTER</code>.  If the receiver is a <code>SEPARATOR</code>
+ * label, the argument is ignored and the alignment is not changed.
+ *
+ * @param alignment the new alignment 
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setAlignment (int alignment) {
+	checkWidget();
+	if ((style & SWT.SEPARATOR) != 0) return;
+	if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
+	style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
+	style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
+	int just = OS.teFlushLeft;
+	if ((alignment & SWT.CENTER) != 0) just = OS.teCenter;
+	if ((alignment & SWT.RIGHT) != 0) just = OS.teFlushRight;
+	ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
+	OS.GetControlData (handle, (short) OS.kControlEntireControl, OS.kControlFontStyleTag, ControlFontStyleRec.sizeof, fontStyle, null);
+	fontStyle.flags |= OS.kControlUseJustMask;
+	fontStyle.just = (short) just;
+	OS.SetControlFontStyle (handle, fontStyle);
+	redraw ();
+}
+
+/**
+ * Sets the receiver's image to the argument, which may be
+ * null indicating that no image should be displayed.
+ *
+ * @param image the image to display on the receiver (may be null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the image 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>
+ */
+public void setImage (Image image) {
+	checkWidget();
+	if ((style & SWT.SEPARATOR) != 0) return;
+	if (image != null && image.isDisposed ()) {
+		error (SWT.ERROR_INVALID_ARGUMENT);
+	}
+	this.image = image;
+	isImage = true;
+	if (image == null) {
+		setText (text);
+		return;
+	}
+	if (text.length () > 0) {
+		int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, null, 0);
+		if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
+		OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
+		OS.CFRelease (ptr);
+	}
+	redraw ();
+}
+
+/**
+ * Sets the receiver's text.
+ * <p>
+ * This method sets the widget label.  The label may include
+ * the mnemonic character and line delimiters.
+ * </p>
+ * <p>
+ * Mnemonics are indicated by an '&amp;' that causes the next
+ * character to be the mnemonic.  When the user presses a
+ * key sequence that matches the mnemonic, focus is assigned
+ * to the control that follows the label. On most platforms,
+ * the mnemonic appears underlined but may be emphasised in a
+ * platform specific manner.  The mnemonic indicator character
+ * '&amp;' can be escaped by doubling it in the string, causing
+ * a single '&amp;' to be displayed.
+ * </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 ((style & SWT.SEPARATOR) != 0) return;
+	isImage = false;
+	text = string;
+	char [] buffer = new char [text.length ()];
+	text.getChars (0, buffer.length, buffer, 0);
+	int length = fixMnemonic (buffer);
+	int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, length);
+	if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
+	OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
+	OS.CFRelease (ptr);
+	redraw ();
+}
+
+}