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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.examples.templateeditor.template;
import org.eclipse.swt.graphics.Image;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.templates.TemplateContextType;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.TemplateCompletionProcessor;
import org.eclipse.ui.examples.templateeditor.editors.TemplateEditorUI;
/**
* A completion processor for XML templates.
*/
public class XMLCompletionProcessor extends TemplateCompletionProcessor {
private static final String DEFAULT_IMAGE= "icons/template.gif"; //$NON-NLS-1$
/**
* We watch for angular brackets since those are often part of XML
* templates.
*/
protected String extractPrefix(ITextViewer viewer, int offset) {
IDocument document= viewer.getDocument();
int i= offset;
if (i > document.getLength())
return ""; //$NON-NLS-1$
try {
while (i > 0) {
char ch= document.getChar(i - 1);
if (ch != '<' && !Character.isJavaIdentifierPart(ch))
break;
i--;
}
return document.get(i, offset - i);
} catch (BadLocationException e) {
return ""; //$NON-NLS-1$
}
}
/**
* Cut out angular brackets for relevance sorting, since the template name
* does not contain the brackets.
*/
protected int getRelevance(Template template, String prefix) {
if (prefix.startsWith("<")) //$NON-NLS-1$
prefix= prefix.substring(1);
if (template.getName().startsWith(prefix))
return 90;
return 0;
}
/**
* Simply return all templates.
*/
protected Template[] getTemplates(String contextTypeId) {
return TemplateEditorUI.getDefault().getTemplateStore().getTemplates();
}
/**
* Return the XML context type that is supported by this plugin.
*/
protected TemplateContextType getContextType(ITextViewer viewer, IRegion region) {
return TemplateEditorUI.getDefault().getContextTypeRegistry().getContextType(XMLContextType.XML_CONTEXT_TYPE);
}
/**
* Always return the default image.
*/
protected Image getImage(Template template) {
ImageRegistry registry= TemplateEditorUI.getDefault().getImageRegistry();
Image image= registry.get(DEFAULT_IMAGE);
if (image == null) {
ImageDescriptor desc= TemplateEditorUI.imageDescriptorFromPlugin("org.eclipse.ui.examples.javaeditor", DEFAULT_IMAGE); //$NON-NLS-1$
registry.put(DEFAULT_IMAGE, desc);
image= registry.get(DEFAULT_IMAGE);
}
return image;
}
}
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