/*******************************************************************************
* Copyright (c) 2000, 2015 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
* Anton Leherbauer (Wind River Systems)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.text;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Map;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
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;
import org.eclipse.text.edits.MalformedTreeException;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.cdt.core.formatter.CodeFormatter;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.internal.corext.util.CodeFormatterUtil;
/**
* @author AChapiro
*/
public class CFormattingStrategy extends ContextBasedFormattingStrategy {
private static class WorkItem {
final IDocument document;
final TypedPosition partition;
WorkItem(IDocument document, TypedPosition partition) {
this.document = document;
this.partition = partition;
}
}
private final Deque<WorkItem> fWorkItems= new ArrayDeque<>();
/**
* Creates a new formatting strategy.
*/
public CFormattingStrategy() {
super();
}
@Override
public void format() {
super.format();
WorkItem workItem = fWorkItems.getFirst();
IDocument document= workItem.document;
TypedPosition partition= workItem.partition;
if (document == null || partition == null)
return;
Map<String, String> preferences = getPreferences();
try {
TextEdit edit = CodeFormatterUtil.format(
CodeFormatter.K_TRANSLATION_UNIT, document.get(),
partition.getOffset(), partition.getLength(), 0,
TextUtilities.getDefaultLineDelimiter(document),
preferences);
if (edit != null)
edit.apply(document);
} catch (MalformedTreeException e) {
CUIPlugin.log(e);
} catch (BadLocationException e) {
// Can only happen on concurrent document modification - log and bail out.
CUIPlugin.log(e);
}
}
@Override
public void formatterStarts(final IFormattingContext context) {
super.formatterStarts(context);
TypedPosition partition = (TypedPosition) context.getProperty(FormattingContextProperties.CONTEXT_PARTITION);
IDocument document= (IDocument) context.getProperty(FormattingContextProperties.CONTEXT_MEDIUM);
fWorkItems.addLast(new WorkItem(document, partition));
}
@Override
public void formatterStops() {
super.formatterStops();
fWorkItems.clear();
}
}