| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.texteditor.quickdiff; |
| |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.source.ILineDiffInfo; |
| import org.eclipse.jface.text.source.ILineDiffer; |
| import org.eclipse.jface.text.source.IVerticalRulerInfo; |
| |
| import org.eclipse.ui.texteditor.ITextEditor; |
| |
| /** |
| * Action that will revert the added, deleted and changes lines in the selection on the currently |
| * displayed document to the state in the reference document. |
| * |
| * @since 3.0 |
| */ |
| public class RevertSelectionAction extends QuickDiffRestoreAction { |
| /** The first line to be restored. Set in <code>update()</code>. */ |
| private int fStartLine; |
| /** The last line to be restored. Set in <code>update()</code>. */ |
| private int fEndLine; |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param editor the editor this action belongs to |
| */ |
| public RevertSelectionAction(ITextEditor editor) { |
| super(QuickDiffMessages.getResourceBundle(), "RevertSelectionAction.", editor); //$NON-NLS-1$ |
| } |
| |
| /* |
| * @see org.eclipse.ui.texteditor.IUpdate#update() |
| */ |
| public void update() { |
| super.update(); |
| |
| if (!isEnabled()) |
| return; |
| |
| setEnabled(false); |
| |
| ITextSelection selection= getSelection(); |
| if (selection == null) |
| return; |
| fStartLine= selection.getStartLine(); |
| fEndLine= selection.getEndLine(); |
| |
| // only enable if mouse activity is inside line range |
| IVerticalRulerInfo ruler= getRuler(); |
| if (ruler == null) |
| return; |
| int activityLine= ruler.getLineOfLastMouseButtonActivity(); |
| if (activityLine < fStartLine || activityLine > fEndLine + 1) |
| // + 1 to cover the case where the selection goes to the offset of the next line |
| return; |
| |
| ILineDiffer differ= getDiffer(); |
| if (differ == null) |
| return; |
| |
| // only enable if selection covers at least two lines |
| if (fEndLine > fStartLine) { |
| for (int i= fStartLine; i <= fEndLine; i++) { |
| ILineDiffInfo info= differ.getLineInfo(i); |
| if (info != null && info.hasChanges()) { |
| setEnabled(true); |
| } |
| } |
| } |
| } |
| |
| /* |
| * @see org.eclipse.ui.internal.editors.quickdiff.QuickDiffRestoreAction#runCompoundChange() |
| */ |
| public void runCompoundChange() { |
| // recheck if run without being enabled |
| if (!isEnabled()) |
| return; |
| |
| ILineDiffer differ= getDiffer(); |
| if (differ != null) { |
| try { |
| differ.revertSelection(fStartLine, fEndLine - fStartLine + 1); |
| } catch (BadLocationException e) { |
| setStatus(e.getMessage()); |
| } |
| } |
| } |
| |
| } |