| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.wst.xsd.ui.internal.refactor.actions; |
| |
| 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.IStructuredSelection; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| |
| |
| |
| /** |
| * 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> |
| * adapted from <code>org.eclipse.jdt.ui.actions.SelectionDispatchAction</code> |
| * </p> |
| * |
| * |
| */ |
| public abstract class SelectionDispatchAction extends Action implements ISelectionChangedListener { |
| |
| private ISelection selection; |
| |
| private Object model; |
| |
| protected SelectionDispatchAction(ISelection selection) { |
| Assert.isNotNull(selection); |
| this.selection = selection; |
| |
| } |
| |
| /** |
| * Returns the selection provided by the site owning this action. |
| * |
| * @return the site's selection |
| */ |
| public ISelection getSelection() { |
| return selection; |
| } |
| |
| /** |
| * 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 |
| */ |
| public void selectionChanged(IStructuredSelection selection) { |
| if (selection.size() == 1) { |
| Object object = selection.getFirstElement(); |
| setEnabled(canEnable(object)); |
| } |
| else{ |
| setEnabled(false); |
| } |
| } |
| |
| protected boolean canEnable(Object selectedObject){ |
| return false; |
| } |
| |
| /** |
| * Executes this actions with the given structured selection. This default implementation |
| * calls <code>run(ISelection selection)</code>. |
| */ |
| public 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 |
| */ |
| public void selectionChanged(ITextSelection selection) { |
| selectionChanged((ISelection)selection); |
| } |
| |
| /** |
| * Executes this actions with the given text selection. This default implementation |
| * calls <code>run(ISelection selection)</code>. |
| */ |
| public 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 |
| */ |
| public void selectionChanged(ISelection selection) { |
| setEnabled(false); |
| } |
| |
| /** |
| * Executes this actions with the given selection. This default implementation |
| * does nothing. |
| */ |
| public 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); |
| } |
| } |
| |
| protected void dispatchRun(ISelection selection) { |
| if (selection instanceof IStructuredSelection) { |
| run((IStructuredSelection)selection); |
| } else if (selection instanceof ITextSelection) { |
| run((ITextSelection)selection); |
| } else { |
| run(selection); |
| } |
| } |
| |
| public final Object getModel() |
| { |
| return model; |
| } |
| |
| public final void setModel(Object model) |
| { |
| this.model = model; |
| } |
| |
| public boolean canRun() { |
| |
| return true; |
| } |
| |
| |
| |
| } |