| /******************************************************************************* |
| * Copyright (c) 2008, 2010 Standards for Technology in Automotive Retail 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: |
| * David Carver - initial API and implementation, bug 212330 |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.ui.internal.handlers; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.commands.IHandler; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.TextSelection; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.ISelectionProvider; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.ui.texteditor.ITextEditorExtension; |
| import org.eclipse.ui.texteditor.ITextEditorExtension2; |
| import org.eclipse.wst.xml.ui.internal.Logger; |
| |
| public class CommentHandler extends AbstractHandler implements IHandler { |
| static final String CLOSE_COMMENT = "-->"; //$NON-NLS-1$ |
| static final String OPEN_COMMENT = "<!--"; //$NON-NLS-1$ |
| |
| public CommentHandler() { |
| super(); |
| } |
| |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| IEditorPart editor = HandlerUtil.getActiveEditor(event); |
| ITextEditor textEditor = null; |
| if (editor instanceof ITextEditor) |
| textEditor = (ITextEditor) editor; |
| else { |
| Object o = editor.getAdapter(ITextEditor.class); |
| if (o != null) |
| textEditor = (ITextEditor) o; |
| } |
| if (textEditor != null && validateEditorInput(textEditor)) { |
| IDocument document = textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput()); |
| if (document != null) { |
| // get current text selection |
| ITextSelection textSelection = getCurrentSelection(textEditor); |
| if (textSelection.isEmpty()) { |
| return null; |
| } |
| |
| processAction(textEditor, document, textSelection); |
| } |
| } |
| |
| return null; |
| } |
| |
| protected boolean validateEditorInput(ITextEditor textEditor) { |
| if (textEditor instanceof ITextEditorExtension2) |
| return ((ITextEditorExtension2)textEditor).validateEditorInputState(); |
| else if (textEditor instanceof ITextEditorExtension) |
| return ((ITextEditorExtension)textEditor).isEditorInputReadOnly(); |
| else if (textEditor != null) |
| return textEditor.isEditable(); |
| return true; |
| |
| } |
| |
| protected ITextSelection getCurrentSelection(ITextEditor textEditor) { |
| ISelectionProvider provider = textEditor.getSelectionProvider(); |
| if (provider != null) { |
| ISelection selection = provider.getSelection(); |
| if (selection instanceof ITextSelection) { |
| return (ITextSelection) selection; |
| } |
| } |
| return TextSelection.emptySelection(); |
| } |
| |
| void processAction(ITextEditor textEditor, IDocument document, ITextSelection textSelection) { |
| // Implementations to over ride. |
| } |
| |
| protected void removeOpenCloseComments(IDocument document, int offset, int length) { |
| try { |
| int adjusted_length = length; |
| |
| // remove open comments |
| String string = document.get(offset, length); |
| int index = string.lastIndexOf(OPEN_COMMENT); |
| while (index != -1) { |
| document.replace(offset + index, OPEN_COMMENT.length(), ""); //$NON-NLS-1$ |
| index = string.lastIndexOf(OPEN_COMMENT, index - 1); |
| adjusted_length -= OPEN_COMMENT.length(); |
| } |
| |
| // remove close comments |
| string = document.get(offset, adjusted_length); |
| index = string.lastIndexOf(CLOSE_COMMENT); |
| while (index != -1) { |
| document.replace(offset + index, CLOSE_COMMENT.length(), ""); //$NON-NLS-1$ |
| index = string.lastIndexOf(CLOSE_COMMENT, index - 1); |
| } |
| } |
| catch (BadLocationException e) { |
| Logger.log(Logger.WARNING_DEBUG, e.getMessage(), e); |
| } |
| } |
| } |