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

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/ui/actions/SelectionDispatchAction.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/ui/actions/SelectionDispatchAction.java
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+/*******************************************************************************
+ * Copyright (c) 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v0.5 
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.ui.actions;
+
+import org.eclipse.swt.widgets.Shell;
+
+import org.eclipse.jface.action.Action;
+import org.eclipse.jface.text.ITextSelection;
+import org.eclipse.jface.util.Assert;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.ISelectionChangedListener;
+import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.viewers.SelectionChangedEvent;
+
+import org.eclipse.core.runtime.CoreException;
+
+import org.eclipse.ui.IWorkbenchSite;
+import org.eclipse.ui.texteditor.IUpdate;
+
+//import org.eclipse.jdt.internal.ui.actions.ActionMessages;
+import net.sourceforge.phpdt.internal.ui.util.ExceptionHandler;
+
+/**
+ * Action that dispatches the <code>IAction#run()</code> and the 
+ * <code>ISelectionChangedListener#selectionChanged</code> 
+ * according to the type of the selection. 
+ * 
+ * <ul>
+ * 	<li>if selection is of type <code>ITextSelection</code> then
+ * 	<code>run(ITextSelection)</code> and <code>selectionChanged(ITextSelection)</code>
+ * 	is called.</li> 
+ * 	<li>if selection is of type <code>IStructuredSelection</code> then
+ * 	<code>run(IStructuredSelection)</code> and <code>
+ * 	selectionChanged(IStructuredSelection)</code> is called.</li>
+ * 	<li>default is to call <code>run(ISelection)</code> and <code>
+ * 	selectionChanged(ISelection)</code>.</li>
+ * </ul>
+ * 
+ * <p>
+ * Note: This class is not intended to be subclassed outside the JDT UI plugin.
+ * </p>
+ * 
+ * @since 2.0
+ */
+public abstract class SelectionDispatchAction extends Action implements ISelectionChangedListener {
+	
+	private IWorkbenchSite fSite;
+	
+	/**
+	 * Creates a new action with no text and no image.
+	 * <p>
+	 * Configure the action later using the set methods.
+	 * </p>
+	 * 
+	 * @param site the site this action is working on
+	 */
+	protected SelectionDispatchAction(IWorkbenchSite site) {
+		Assert.isNotNull(site);
+		fSite= site;
+	}
+
+	/**
+	 * Returns the site owning this action.
+	 * 
+	 * @return the site owning this action
+	 */
+	public IWorkbenchSite getSite() {
+		return fSite;
+	}
+
+	/**
+	 * Returns the selection provided by the site owning this action.
+	 * 
+	 * @return the site's selection
+	 */	
+	public ISelection getSelection() {
+		return getSelectionProvider().getSelection();
+	}
+
+	/**
+	 * Returns the shell provided by the site owning this action.
+	 * 
+	 * @return the site's shell	
+	 */
+	public  Shell getShell() {
+		return fSite.getShell();
+	}
+	
+	/**
+	 * Returns the selection provider managed by the site owning this action.
+	 * 
+	 * @return the site's selection provider	
+	 */
+	public ISelectionProvider getSelectionProvider() {
+		return fSite.getSelectionProvider();
+	}
+
+	/**
+	 * Updates the action's enablement state according to the given selection. This
+	 * default implementation calls one of the <code>selectionChanged</code>
+	 * methods depending on the type of the passed selection.
+	 * 
+	 * @param selection the selection this action is working on
+	 */
+	public void update(ISelection selection) {
+		dispatchSelectionChanged(selection);
+	}
+
+	/**
+	 * Notifies this action that the given structured selection has changed. This default
+	 * implementation calls <code>selectionChanged(ISelection selection)</code>.
+	 * 
+	 * @param selection the new selection
+ 	 */
+	protected void selectionChanged(IStructuredSelection selection) {
+		selectionChanged((ISelection)selection);
+	}
+
+	/**
+	 * Executes this actions with the given structured selection. This default implementation
+	 * calls <code>run(ISelection selection)</code>.
+	 */
+	protected void run(IStructuredSelection selection) {
+		run((ISelection)selection);
+	}
+	
+	/**
+	 * Notifies this action that the given text selection has changed.  This default
+	 * implementation calls <code>selectionChanged(ISelection selection)</code>.
+	 * 
+	 * @param selection the new selection
+ 	 */
+	protected void selectionChanged(ITextSelection selection) {
+		selectionChanged((ISelection)selection);
+	}
+	
+	/**
+	 * Executes this actions with the given text selection. This default implementation
+	 * calls <code>run(ISelection selection)</code>.
+	 */
+	protected void run(ITextSelection selection) {
+		run((ISelection)selection);
+	}
+	
+	/**
+	 * Notifies this action that the given selection has changed.  This default
+	 * implementation sets the action's enablement state to <code>false</code>.
+	 * 
+	 * @param selection the new selection
+ 	 */
+	protected void selectionChanged(ISelection selection) {
+		setEnabled(false);
+	}
+	
+	/**
+	 * Executes this actions with the given selection. This default implementation
+	 * does nothing.
+	 */
+	protected void run(ISelection selection) {
+	}
+
+	/* (non-Javadoc)
+	 * Method declared on IAction.
+	 */
+	public void run() {
+		dispatchRun(getSelection());
+	}
+	
+	/* (non-Javadoc)
+	 * Method declared on ISelectionChangedListener.
+	 */
+	public void selectionChanged(SelectionChangedEvent event) {
+		dispatchSelectionChanged(event.getSelection());
+	}
+
+	private void dispatchSelectionChanged(ISelection selection) {
+		if (selection instanceof IStructuredSelection) {
+			selectionChanged((IStructuredSelection)selection);
+		} else if (selection instanceof ITextSelection) {
+			selectionChanged((ITextSelection)selection);
+		} else {
+			selectionChanged(selection);
+		}
+	}
+
+	private void dispatchRun(ISelection selection) {
+		if (selection instanceof IStructuredSelection) {
+			run((IStructuredSelection)selection);
+		} else if (selection instanceof ITextSelection) {
+			run((ITextSelection)selection);
+		} else {
+			run(selection);
+		}
+	}
+}
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