| /******************************************************************************* |
| * 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.actions.range; |
| |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.viewers.ISelectionChangedListener; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jst.pagedesigner.dom.DOMPositionHelper; |
| import org.eclipse.jst.pagedesigner.dom.DOMRange; |
| import org.eclipse.jst.pagedesigner.viewer.DesignRange; |
| import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer; |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| /** |
| * @author mengbo |
| */ |
| public abstract class DesignerToolBarAction extends Action implements IUpdate, |
| ISelectionChangedListener { |
| private IHTMLGraphicalViewer _viewer; |
| |
| /** |
| * @param text |
| * @param style |
| */ |
| public DesignerToolBarAction(String text, int style) { |
| super(text, style); |
| } |
| |
| /** |
| * @param text |
| * @param image |
| */ |
| public DesignerToolBarAction(String text, ImageDescriptor image) { |
| super(text, image); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) |
| */ |
| public void selectionChanged(SelectionChangedEvent event) { |
| update(); |
| } |
| |
| /** |
| * |
| */ |
| public void update() { |
| if (canRun(this._viewer)) { |
| setEnabled(true); |
| updateStatus(); |
| } else { |
| setEnabled(false); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.texteditor.IUpdate#update() |
| */ |
| public void updateStatus() { |
| DesignRange range = _viewer.getRangeSelection(); |
| DOMRange domRange = null; |
| if (range != null) { |
| domRange = new DOMRange(DOMPositionHelper.toDOMPosition(range |
| .getStartPosition()), DOMPositionHelper.toDOMPosition(range |
| .getEndPosition())); |
| if (isApplied(domRange)) { |
| this.setChecked(true); |
| } else { |
| this.setChecked(false); |
| } |
| } |
| } |
| |
| protected abstract boolean isApplied(DOMRange range); |
| |
| protected boolean canRun(IHTMLGraphicalViewer viewer) { |
| if (viewer != null && viewer.isInRangeMode() |
| && viewer.getModel().getDocument().hasChildNodes()) { |
| DesignRange range = viewer.getRangeSelection(); |
| if (range != null && range.isValid()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void setViewer(IHTMLGraphicalViewer viewer) { |
| if (viewer == _viewer) { |
| return; |
| } else { |
| if (_viewer != null) { |
| _viewer.removeSelectionChangedListener(this); |
| } |
| _viewer = viewer; |
| if (_viewer != null) { |
| _viewer.addSelectionChangedListener(this); |
| } |
| update(); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.action.IAction#run() |
| */ |
| public void run() { |
| // Assert.isTrue(_viewer != null && _viewer.isInRangeMode()); |
| DesignRange range = _viewer.getRangeSelection(); |
| if (range == null || !range.isValid()) { |
| return; |
| } |
| Command command = getCommand(); |
| if (command != null) { |
| command.execute(); |
| } |
| } |
| |
| protected abstract Command getCommand(); |
| |
| /** |
| * @return Returns the _viewer. |
| */ |
| public IHTMLGraphicalViewer getViewer() { |
| return _viewer; |
| } |
| |
| } |