1 files changed, 107 insertions, 0 deletions
diff --git a/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/editors/actions/DesignerUndoRedoAction.java b/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/editors/actions/DesignerUndoRedoAction.java
new file mode 100644
index 000000000..c441f649c
--- /dev/null
+++ b/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/editors/actions/DesignerUndoRedoAction.java
@@ -0,0 +1,107 @@
+/*******************************************************************************
+ * Copyright (c) 2006 Sybase, Inc. 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:
+ *     Sybase, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jst.pagedesigner.editors.actions;
+
+import java.text.MessageFormat;
+
+import org.eclipse.emf.common.command.Command;
+import org.eclipse.gef.ui.actions.UpdateAction;
+import org.eclipse.jface.action.Action;
+import org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor;
+import org.eclipse.wst.sse.core.internal.undo.IStructuredTextUndoManager;
+
+/**
+ * SSE has a IDocumentSelectionMediator mechanism, basically it let the viewer
+ * that invoke the redo/undo to reset the selection after redo/undo.
+ * 
+ * To utilize this feature, we can't directly use the undo/redo action of the
+ * text editor for the designer, since in that way it will be the TextEditor to
+ * handle selection after redo/undo.
+ * 
+ * @author mengbo
+ * @version 1.5
+ */
+public class DesignerUndoRedoAction extends Action implements UpdateAction {
+	private boolean _undo = true; // if false means redo
+
+	private SimpleGraphicalEditor _designer;
+
+	/**
+	 * 
+	 */
+	public DesignerUndoRedoAction(boolean undo, SimpleGraphicalEditor designer) {
+		this._undo = undo;
+		this._designer = designer;
+
+		if (undo) {
+			setText(ActionsMessages.getString("DesignerUndoRedoAction.UNDO")); //$NON-NLS-1$
+		} else {
+			setText(ActionsMessages.getString("DesignerUndoRedoAction.REDO")); //$NON-NLS-1$
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.gef.ui.actions.UpdateAction#update()
+	 */
+	public void update() {
+		IStructuredTextUndoManager undoManager = _designer.getHTMLEditor()
+				.getModel().getUndoManager();
+		if (_undo) {
+			Command c = undoManager.getUndoCommand();
+			this.setEnabled(undoManager.undoable());
+			if (c != null) {
+				String label = c.getLabel();
+				this
+						.setText(MessageFormat
+								.format(
+										ActionsMessages
+												.getString("DesignerUndoRedoAction.UNDO_LABEL"), new Object[] { label })); //$NON-NLS-1$
+			} else {
+				this.setText(ActionsMessages
+						.getString("DesignerUndoRedoAction.UNDO")); //$NON-NLS-1$
+			}
+		} else {
+			Command c = undoManager.getRedoCommand();
+			this.setEnabled(undoManager.redoable());
+			if (c != null) {
+				String label = c.getLabel();
+				this
+						.setText(MessageFormat
+								.format(
+										ActionsMessages
+												.getString("DesignerUndoRedoAction.REDO_LABEL"), new Object[] { label })); //$NON-NLS-1$
+			} else {
+				this.setText(ActionsMessages
+						.getString("DesignerUndoRedoAction.REDO")); //$NON-NLS-1$
+			}
+		}
+
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.jface.action.Action#run()
+	 */
+	public void run() {
+		IStructuredTextUndoManager undoManager = _designer.getHTMLEditor()
+				.getModel().getUndoManager();
+		if (_undo) {
+			undoManager.undo(_designer);
+		} else {
+			undoManager.redo(_designer);
+		}
+	}
+
+}