/*
* $Id$
*
* Copyright (c) 2004-2005 by the TeXlapse Team.
* 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
*/
package net.sourceforge.texlipse.actions;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.text.source.projection.ProjectionAnnotationModel;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.texteditor.ITextEditor;
/**
* Action for uncollapsing code folds. Expands all folds contained in the
* selection or the fold the cursor is currently at.
*
* @author Oskar Ojala
*/
public class TexUncollapseAction implements IEditorActionDelegate {
private IEditorPart targetEditor;
/* (non-Javadoc)
* @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction, org.eclipse.ui.IEditorPart)
*/
public void setActiveEditor(IAction action, IEditorPart targetEditor) {
this.targetEditor = targetEditor;
}
/**
* This function returns the text editor.
*/
private ITextEditor getTextEditor() {
if (targetEditor instanceof ITextEditor) {
return (ITextEditor) targetEditor;
} else {
throw new RuntimeException("Expecting text editor. Found:"+targetEditor.getClass().getName());
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
public void run(IAction action) {
TexSelections selection = new TexSelections(getTextEditor());
int firstOffset = selection.getStartLine().getOffset();
int lastOffset = selection.getEndLine().getOffset();
ProjectionAnnotationModel model = (ProjectionAnnotationModel) getTextEditor()
.getAdapter(ProjectionAnnotationModel.class);
if (model != null) {
// the predefined method permits us to do this, even if length=0
model.expandAll(firstOffset, lastOffset - firstOffset);
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
if (selection instanceof TextSelection) {
action.setEnabled(true);
return;
}
action.setEnabled(targetEditor instanceof ITextEditor);
}
}