X-Git-Url: http://secure.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ImageDescriptorRegistry.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ImageDescriptorRegistry.java
new file mode 100644
index 0000000..4b3f09b
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ImageDescriptorRegistry.java
@@ -0,0 +1,93 @@
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+package net.sourceforge.phpdt.internal.ui.viewsupport;
+
+import java.util.HashMap;
+import java.util.Iterator;
+
+import net.sourceforge.phpdt.internal.ui.util.SWTUtil;
+
+import org.eclipse.jface.resource.ImageDescriptor;
+//incastrix
+//import org.eclipse.jface.text.Assert;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.widgets.Display;
+
+/**
+ * A registry that maps <code>ImageDescriptors</code> to <code>Image</code>.
+ */
+public class ImageDescriptorRegistry {
+
+	private HashMap fRegistry = new HashMap(10);
+
+	private Display fDisplay;
+
+	/**
+	 * Creates a new image descriptor registry for the current or default
+	 * display, respectively.
+	 */
+	public ImageDescriptorRegistry() {
+		this(SWTUtil.getStandardDisplay());
+	}
+
+	/**
+	 * Creates a new image descriptor registry for the given display. All images
+	 * managed by this registry will be disposed when the display gets disposed.
+	 * 
+	 * @param diaplay
+	 *            the display the images managed by this registry are allocated
+	 *            for
+	 */
+	public ImageDescriptorRegistry(Display display) {
+		fDisplay = display;
+		Assert.isNotNull(fDisplay);
+		hookDisplay();
+	}
+
+	/**
+	 * Returns the image assiciated with the given image descriptor.
+	 * 
+	 * @param descriptor
+	 *            the image descriptor for which the registry manages an image
+	 * @return the image associated with the image descriptor or
+	 *         <code>null</code> if the image descriptor can't create the
+	 *         requested image.
+	 */
+	public Image get(ImageDescriptor descriptor) {
+		if (descriptor == null)
+			descriptor = ImageDescriptor.getMissingImageDescriptor();
+
+		Image result = (Image) fRegistry.get(descriptor);
+		if (result != null)
+			return result;
+
+		Assert.isTrue(fDisplay == SWTUtil.getStandardDisplay(),
+				"Allocating image for wrong display."); //$NON-NLS-1$
+		result = descriptor.createImage();
+		if (result != null)
+			fRegistry.put(descriptor, result);
+		return result;
+	}
+
+	/**
+	 * Disposes all images managed by this registry.
+	 */
+	public void dispose() {
+		for (Iterator iter = fRegistry.values().iterator(); iter.hasNext();) {
+			Image image = (Image) iter.next();
+			image.dispose();
+		}
+		fRegistry.clear();
+	}
+
+	private void hookDisplay() {
+		fDisplay.disposeExec(new Runnable() {
+			public void run() {
+				dispose();
+			}
+		});
+	}
+}