| /******************************************************************************* |
| * Copyright (c) 2008, 2011 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.jdt.internal.ui.text.java; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DefaultTextDoubleClickStrategy; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITypedRegion; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.text.TextUtilities; |
| |
| |
| /** |
| * Double click strategy that selects the partition if double click occurs at the partition |
| * boundaries. |
| * |
| * @since 3.5 |
| */ |
| public class PartitionDoubleClickSelector extends DefaultTextDoubleClickStrategy { |
| |
| private String fPartitioning; |
| |
| int fLeftBorder; |
| int fRightBorder; |
| int fHitDelta; |
| |
| |
| /** |
| * Creates a new partition double click selector for the given document partitioning. |
| * |
| * @param partitioning the document partitioning |
| * @param leftBorder number of characters to ignore from the left border of the partition |
| * @param rightBorder number of characters to ignore from the right border of the partition |
| */ |
| public PartitionDoubleClickSelector(String partitioning, int leftBorder, int rightBorder) { |
| this(partitioning, leftBorder, rightBorder, 1); |
| } |
| |
| /** |
| * Creates a new partition double click selector for the given document partitioning. |
| * |
| * @param partitioning the document partitioning |
| * @param leftBorder number of characters to ignore from the left border of the partition |
| * @param rightBorder number of characters to ignore from the right border of the partition |
| * @param hitDeltaOffset character offset delta relative to partition borders used to define the |
| * trigger character |
| * @since 3.6 |
| */ |
| public PartitionDoubleClickSelector(String partitioning, int leftBorder, int rightBorder, int hitDeltaOffset) { |
| fPartitioning= partitioning; |
| fLeftBorder= leftBorder; |
| fRightBorder= rightBorder; |
| fHitDelta= hitDeltaOffset; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.DefaultTextDoubleClickStrategy#findExtendedDoubleClickSelection(org.eclipse.jface.text.IDocument, int) |
| * @since 3.5 |
| */ |
| @Override |
| protected IRegion findExtendedDoubleClickSelection(IDocument document, int offset) { |
| IRegion match= super.findExtendedDoubleClickSelection(document, offset); |
| if (match != null) |
| return match; |
| |
| try { |
| ITypedRegion region= TextUtilities.getPartition(document, fPartitioning, offset, true); |
| if (offset == region.getOffset() + fHitDelta || offset == region.getOffset() + region.getLength() - fHitDelta) { |
| if (fLeftBorder == 0 && fRightBorder == 0) |
| return region; |
| if (fRightBorder == -1) { |
| String delimiter= document.getLineDelimiter(document.getLineOfOffset(region.getOffset() + region.getLength() - 1)); |
| if (delimiter == null) |
| fRightBorder= 0; |
| else |
| fRightBorder= delimiter.length(); |
| } |
| return new Region(region.getOffset() + fLeftBorder, region.getLength() - fLeftBorder - fRightBorder); |
| } |
| } catch (BadLocationException e) { |
| return null; |
| } |
| return null; |
| } |
| } |