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/*******************************************************************************
* Copyright (c) 2000, 2007 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
*
*******************************************************************************/
package org.eclipse.dltk.internal.ui.editor;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.ModelException;
import org.eclipse.dltk.internal.ui.actions.SelectionConverter;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.TextSelection;
/**
* A special text selection that gives access to the resolved and
* enclosing element.
*/
public class ModelTextSelection extends TextSelection {
private IModelElement fElement;
private IModelElement[] fResolvedElements;
private boolean fEnclosingElementRequested;
private IModelElement fEnclosingElement;
/**
* Creates a new text selection at the given offset and length.
*/
public ModelTextSelection(IModelElement element, IDocument document, int offset, int length) {
super(document, offset, length);
fElement= element;
}
/**
* Resolves the <code>IModelElement</code>s at the current offset. Returns
* an empty array if the string under the offset doesn't resolve to a
* <code>IModelElement</code>.
*
* @return the resolvedscriptelements at the current offset
* @throws ModelException passed from the underlying code resolve API
*/
public IModelElement[] resolveElementAtOffset() throws ModelException {
if (fResolvedElements != null)
return fResolvedElements;
// long start= System.currentTimeMillis();
fResolvedElements= SelectionConverter.codeResolve(fElement, this);
// System.out.println("Time resolving element: " + (System.currentTimeMillis() - start));
return fResolvedElements;
}
public IModelElement resolveEnclosingElement() throws ModelException {
if (fEnclosingElementRequested)
return fEnclosingElement;
fEnclosingElementRequested= true;
fEnclosingElement= SelectionConverter.resolveEnclosingElement(fElement, this);
return fEnclosingElement;
}
}