| /******************************************************************************* |
| * Copyright (c) 2009, 2011 David Green and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * David Green - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.wikitext.ui.util.css.editor; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DocumentEvent; |
| 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.TextAttribute; |
| import org.eclipse.jface.text.TextPresentation; |
| import org.eclipse.jface.text.presentation.IPresentationDamager; |
| import org.eclipse.jface.text.presentation.IPresentationRepairer; |
| import org.eclipse.swt.custom.StyleRange; |
| |
| /** |
| * based on the XML editor example |
| * |
| * @author David Green |
| */ |
| class CommentDamagerRepairer implements IPresentationDamager, IPresentationRepairer { |
| |
| private IDocument document; |
| |
| private final TextAttribute defaultTextAttribute; |
| |
| public CommentDamagerRepairer(TextAttribute defaultTextAttribute) { |
| super(); |
| this.defaultTextAttribute = defaultTextAttribute; |
| } |
| |
| public IRegion getDamageRegion(ITypedRegion partition, DocumentEvent event, boolean documentPartitioningChanged) { |
| if (!documentPartitioningChanged) { |
| try { |
| IRegion lineRegion = document.getLineInformationOfOffset(event.getOffset()); |
| int start = Math.max(lineRegion.getOffset(), partition.getOffset()); |
| int end = event.getOffset(); |
| if (event.getText() == null) { |
| end += event.getLength(); |
| } else { |
| end += event.getText().length(); |
| } |
| if (lineRegion.getOffset() <= end && end <= lineRegion.getOffset() + lineRegion.getLength()) { |
| // same line |
| end = lineRegion.getOffset() + lineRegion.getLength(); |
| } else { |
| end = toLineEnd(end); |
| } |
| int partitionEnd = partition.getOffset() + partition.getLength(); |
| end = Math.min(partitionEnd, end); |
| return new Region(start, end - start); |
| } catch (BadLocationException e) { |
| // ignore |
| } |
| } |
| return partition; |
| } |
| |
| /** |
| * return the offset of the end of the line, or if the offset includes a line terminator then the end of the next |
| * line. |
| */ |
| private int toLineEnd(int offset) throws BadLocationException { |
| IRegion lineRegion = document.getLineInformationOfOffset(offset); |
| int lineEndOffset = lineRegion.getOffset() + lineRegion.getLength(); |
| if (offset <= lineEndOffset) { |
| return lineEndOffset; |
| } |
| |
| int line = document.getLineOfOffset(offset); |
| try { |
| lineRegion = document.getLineInformation(line + 1); |
| lineEndOffset = lineRegion.getOffset() + lineRegion.getLength(); |
| return lineEndOffset; |
| } catch (BadLocationException x) { |
| return document.getLength(); |
| } |
| } |
| |
| public void setDocument(IDocument document) { |
| this.document = document; |
| } |
| |
| public void createPresentation(TextPresentation presentation, ITypedRegion damage) { |
| presentation.addStyleRange(new StyleRange(damage.getOffset(), damage.getLength(), |
| defaultTextAttribute.getForeground(), defaultTextAttribute.getBackground(), |
| defaultTextAttribute.getStyle())); |
| } |
| |
| } |