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/*******************************************************************************
* Copyright (c) 2000, 2008 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.ui.internal.editors.quickdiff;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.source.ILineDiffInfo;
import org.eclipse.jface.text.source.ILineDiffer;
import org.eclipse.ui.internal.editors.text.NLSUtility;
import org.eclipse.ui.texteditor.ITextEditor;
/**
* Action that will restore a block of deleted lines at the current caret position in an editor.
*
* @since 3.1
*/
public class RestoreAction extends QuickDiffRestoreAction {
/** Resource key prefix. */
private static final String PREFIX= "RestoreAction."; //$NON-NLS-1$
/** The line to be restored. Set in <code>update()</code>. */
private int fLine;
/**
* Creates a new instance.
*
* @param editor the editor this action belongs to
* @param isRulerAction <code>true</code> if this is a ruler action
*/
public RestoreAction(ITextEditor editor, boolean isRulerAction) {
super(QuickDiffMessages.getResourceBundle(), PREFIX, editor, isRulerAction);
}
@Override
public boolean computeEnablement() {
if (!super.computeEnablement())
return false;
fLine= getLastLine();
if (fLine == -1)
return false;
ILineDiffer differ= getDiffer();
if (differ == null)
return false;
ILineDiffInfo info= differ.getLineInfo(fLine);
if (info == null || (info.getRemovedLinesAbove() <= 0 && info.getRemovedLinesBelow() <= 0))
return false;
if (info.getRemovedLinesBelow() == 0) {
fLine--;
} else if (info.getRemovedLinesAbove() != 0) {
// take the line below
}
info= differ.getLineInfo(fLine);
if (info == null)
return false;
if (info.getRemovedLinesBelow() == 1)
setText(QuickDiffMessages.getString("RestoreAction.label")); //$NON-NLS-1$
else
setText(NLSUtility.format(QuickDiffMessages.getString("RestoreAction.multiple.label"), String.valueOf(info.getRemovedLinesBelow()))); //$NON-NLS-1$
return true;
}
@Override
public void runCompoundChange() {
if (!isEnabled())
return;
ILineDiffer differ= getDiffer();
if (differ != null) {
try {
differ.restoreAfterLine(fLine);
} catch (BadLocationException e) {
setStatus(e.getMessage());
}
}
}
}
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