| /******************************************************************************* |
| * 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 org.eclipse.jface.action.Action; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jst.pagedesigner.commands.DesignerCommand; |
| import org.eclipse.jst.pagedesigner.commands.range.ApplyStyleCommand; |
| import org.eclipse.jst.pagedesigner.range.RangeUtil; |
| import org.eclipse.jst.pagedesigner.viewer.DesignRange; |
| import org.eclipse.jst.pagedesigner.viewer.HTMLGraphicalViewerListenenerAdapter; |
| import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer; |
| import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewerListener; |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| /** |
| * @author mengbo |
| */ |
| public abstract class ChangeStyleAction extends Action implements IUpdate { |
| private IHTMLGraphicalViewer _viewer; |
| |
| private String _expectedTag; |
| |
| private IHTMLGraphicalViewerListener _listener = new HTMLGraphicalViewerListenenerAdapter() |
| { |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewerListener#selectionChangeFinished() |
| */ |
| public void selectionChangeFinished() { |
| update(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) |
| */ |
| public void selectionChanged(SelectionChangedEvent event) { |
| update(); |
| } |
| }; |
| |
| /** |
| * @param text |
| * @param name |
| * @param image |
| * @param style |
| */ |
| public ChangeStyleAction(String text, String name, ImageDescriptor image, |
| int style) { |
| super(text, style); |
| _expectedTag = name; |
| this.setImageDescriptor(image); |
| } |
| |
| /** |
| * @param viewer |
| */ |
| public void setViewer(IHTMLGraphicalViewer viewer) { |
| if (viewer == _viewer) { |
| return; |
| } |
| if (_viewer != null) { |
| _viewer.removeHTMLViewerListener(_listener); |
| } |
| _viewer = viewer; |
| if (_viewer != null) { |
| _viewer.addHTMLViewerListener(_listener); |
| } |
| update(); |
| } |
| |
| /** |
| * |
| */ |
| public void update() |
| { |
| boolean update = checkForUpdateAndMaybeDisableState(); |
| |
| if (update) |
| { |
| updateState(); |
| } |
| } |
| |
| /** |
| * Update the state |
| */ |
| protected void updateState() |
| { |
| DesignRange range = _viewer.getRangeSelection(); |
| updateStatus(RangeUtil.normalize(range)); |
| } |
| |
| /** |
| * Update the checked/enabled state |
| * @return true if we should update status |
| */ |
| protected final boolean checkForUpdateAndMaybeDisableState() |
| { |
| if (_viewer == null) { |
| this.setChecked(false); |
| this.setEnabled(false); |
| return false; |
| } |
| if (!_viewer.isInRangeMode()) { |
| // XXX: later we may support in range mode. |
| this.setChecked(false); |
| this.setEnabled(false); |
| return false; |
| } |
| DesignRange range = _viewer.getRangeSelection(); |
| if (range == null || !range.isValid()) { |
| this.setChecked(false); |
| this.setEnabled(false); |
| return false; |
| } |
| return true; |
| } |
| |
| |
| /** |
| * @return the viewer's current design range |
| */ |
| protected final DesignRange getDesignRange() |
| { |
| return _viewer.getRangeSelection(); |
| } |
| /** |
| * @param range |
| */ |
| private void updateStatus(DesignRange range) { |
| if (range.isEmpty()) { |
| this.setEnabled(false); |
| this.setChecked(false); // FIXME: not handling checked status yet. |
| } else { |
| this.setEnabled(true); |
| this.setChecked(false); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.action.Action#run() |
| */ |
| public void run() { |
| if (_viewer == null || !_viewer.isInRangeMode()) { |
| return; |
| } |
| DesignRange range = _viewer.getRangeSelection(); |
| if (range == null || !range.isValid()) { |
| return; |
| } |
| if (range.isEmpty()) |
| return; // nothing to do to empty range. |
| |
| // if currently checked, means unapply the style. If current not |
| // checked, means apply the style |
| boolean apply = !this.isChecked(); |
| if (apply) { |
| applyStyle(); |
| } else { |
| // not supported yet. |
| } |
| } |
| |
| /** |
| * |
| */ |
| private void applyStyle() { |
| DesignerCommand command = new ApplyStyleCommand(_viewer, |
| getExpectedTag(), getExpectedCSSProperty(), |
| getExpectedCSSPropertyValue()); |
| command.execute(); |
| } |
| |
| /** |
| * @return the expected property value |
| */ |
| protected abstract String getExpectedCSSPropertyValue(); |
| |
| /** |
| * @return the expected property |
| */ |
| protected abstract String getExpectedCSSProperty(); |
| |
| /** |
| * @return the expected tag |
| */ |
| protected String getExpectedTag() { |
| return _expectedTag; |
| } |
| } |