/*******************************************************************************
* Copyright (c) 2000, 2017 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.dltk.internal.ui.actions;
import org.eclipse.dltk.internal.ui.editor.ScriptEditor;
import org.eclipse.dltk.internal.ui.text.ScriptWordFinder;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.ITextViewerExtension5;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Point;
public abstract class DLTKQuickMenuAction extends QuickMenuAction {
private ScriptEditor fEditor;
public DLTKQuickMenuAction(String commandId) {
super(commandId);
}
public DLTKQuickMenuAction(ScriptEditor editor, String commandId) {
super(commandId);
fEditor = editor;
}
protected ScriptEditor getScriptEditor() {
return fEditor;
}
@Override
protected Point computeMenuLocation(StyledText text) {
if (fEditor == null || text != fEditor.getViewer().getTextWidget())
return null;
return computeWordStart();
}
private Point computeWordStart() {
ITextSelection selection = (ITextSelection) fEditor
.getSelectionProvider().getSelection();
IRegion textRegion = ScriptWordFinder.findWord(fEditor.getViewer()
.getDocument(), selection.getOffset());
if (textRegion == null)
return null;
IRegion widgetRegion = modelRange2WidgetRange(textRegion);
if (widgetRegion == null)
return null;
int start = widgetRegion.getOffset();
StyledText styledText = fEditor.getViewer().getTextWidget();
Point result = styledText.getLocationAtOffset(start);
result.y += styledText.getLineHeight(start);
if (!styledText.getClientArea().contains(result))
return null;
return result;
}
private IRegion modelRange2WidgetRange(IRegion region) {
ISourceViewer viewer = fEditor.getViewer();
if (viewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
return extension.modelRange2WidgetRange(region);
}
IRegion visibleRegion = viewer.getVisibleRegion();
int start = region.getOffset() - visibleRegion.getOffset();
int end = start + region.getLength();
if (end > visibleRegion.getLength())
end = visibleRegion.getLength();
return new Region(start, end - start);
}
}