pydoubleclickstrategy.java

Python Development Environment (Python IDE plugin for Eclipse). Features editor, code completion, re

/*
 * Author: atotic, fabioz
 * Created on Apr 14, 2004
 * License: Common Public License v1.0
 */
package org.python.pydev.editor;

import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextDoubleClickStrategy;
import org.eclipse.jface.text.ITextViewer;
import org.python.copiedfromeclipsesrc.PythonPairMatcher;
import org.python.pydev.core.docutils.DocUtils;

/**
 * Our double-click implementation. Based on org.eclipse.jdt.internal.ui.text.java.JavaDoubleClickStrategy.
 */
public class PyDoubleClickStrategy implements ITextDoubleClickStrategy {

	protected PythonPairMatcher fPairMatcher = new PythonPairMatcher(DocUtils.BRACKETS);

	/**
	 * @see ITextDoubleClickStrategy#doubleClicked
	 */
	public void doubleClicked(ITextViewer textViewer) {

		int offset = textViewer.getSelectedRange().x;

		if (offset < 0)
			return;

		IDocument document = textViewer.getDocument();

		IRegion region = fPairMatcher.match(document, offset);
		if (region != null && region.getLength() >= 2){
			textViewer.setSelectedRange(region.getOffset() + 1, region.getLength() - 2);
		}else{
			selectWord(textViewer, document, offset);
		}
	}

	protected void selectWord(ITextViewer textViewer, IDocument document, int anchor) {

		try {

			int offset = anchor;
			char c;

			while (offset >= 0) {
				c = document.getChar(offset);
				if (!Character.isJavaIdentifierPart(c)){
					break;
				}
					
				--offset;
			}

			int start = offset;

			offset = anchor;
			int length = document.getLength();

			while (offset < length) {
				c = document.getChar(offset);
				if (!Character.isJavaIdentifierPart(c)){
					break;
				}
				++offset;
			}

			int end = offset;

			if (start == end){
				textViewer.setSelectedRange(start, 0);
			}else{
				textViewer.setSelectedRange(start + 1, end - start - 1);
			}

		} catch (BadLocationException x) {
		}
	}
}