| /******************************************************************************* |
| * Copyright (c) 2004, 2006 John-Mason P. Shackelford 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: |
| * John-Mason P. Shackelford - initial API and implementation |
| * IBM Corporation - bug 52076, bug 84342 |
| *******************************************************************************/ |
| |
| package org.eclipse.ant.internal.ui.editor.formatter; |
| |
| import java.util.LinkedList; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.TextUtilities; |
| import org.eclipse.jface.text.TypedPosition; |
| import org.eclipse.jface.text.formatter.ContextBasedFormattingStrategy; |
| import org.eclipse.jface.text.formatter.FormattingContextProperties; |
| import org.eclipse.jface.text.formatter.IFormattingContext; |
| |
| public class XmlElementFormattingStrategy extends ContextBasedFormattingStrategy { |
| |
| /** access to the preferences store * */ |
| private final FormattingPreferences prefs; |
| |
| /** Documents to be formatted by this strategy */ |
| private final LinkedList fDocuments= new LinkedList(); |
| /** Partitions to be formatted by this strategy */ |
| private final LinkedList fPartitions= new LinkedList(); |
| |
| public XmlElementFormattingStrategy() { |
| this.prefs = new FormattingPreferences(); |
| } |
| |
| public XmlElementFormattingStrategy(FormattingPreferences prefs) { |
| Assert.isNotNull(prefs); |
| this.prefs=prefs; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.text.formatter.IFormattingStrategyExtension#format() |
| */ |
| public void format() { |
| |
| super.format(); |
| |
| final IDocument document= (IDocument)fDocuments.removeFirst(); |
| final TypedPosition partition= (TypedPosition)fPartitions.removeFirst(); |
| |
| if (document == null || partition == null) { |
| return; |
| } |
| |
| try { |
| String formatted = formatElement(document, partition); |
| String partitionText = document.get(partition.getOffset(), |
| partition.getLength()); |
| |
| if (formatted != null && !formatted.equals(partitionText)) { |
| document.replace(partition.getOffset(), partition.getLength(), |
| formatted); |
| } |
| |
| } catch (BadLocationException e) { |
| } |
| } |
| |
| private String formatElement(IDocument document, TypedPosition partition) |
| throws BadLocationException { |
| |
| String partitionText = document.get(partition.getOffset(), partition.getLength()); |
| |
| IRegion line = document.getLineInformationOfOffset(partition.getOffset()); |
| |
| int indentLength = partition.getOffset() - line.getOffset(); |
| String lineDelimiter= document.getLineDelimiter(document.getLineOfOffset(line.getOffset())); |
| if (lineDelimiter == null) { |
| lineDelimiter= TextUtilities.getDefaultLineDelimiter(document); |
| } |
| return XmlTagFormatter.format(partitionText, prefs, document.get(line.getOffset(), indentLength), lineDelimiter); |
| |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.formatter.ContextBasedFormattingStrategy#formatterStarts(org.eclipse.jface.text.formatter.IFormattingContext) |
| */ |
| public void formatterStarts(final IFormattingContext context) { |
| super.formatterStarts(context); |
| |
| fPartitions.addLast(context.getProperty(FormattingContextProperties.CONTEXT_PARTITION)); |
| fDocuments.addLast(context.getProperty(FormattingContextProperties.CONTEXT_MEDIUM)); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.formatter.ContextBasedFormattingStrategy#formatterStops() |
| */ |
| public void formatterStops() { |
| super.formatterStops(); |
| |
| fPartitions.clear(); |
| fDocuments.clear(); |
| } |
| } |