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/*******************************************************************************
* Copyright (c) 2007, 2016 Wind River Systems, Inc. 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:
* Anton Leherbauer (Wind River Systems) - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.corext.template.c;
import java.util.Iterator;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.DefaultLineTracker;
import org.eclipse.jface.text.ILineTracker;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.TemplateBuffer;
import org.eclipse.jface.text.templates.TemplateContext;
import org.eclipse.jface.text.templates.TemplateException;
import org.eclipse.jface.text.templates.TemplateTranslator;
import org.eclipse.jface.text.templates.TemplateVariableResolver;
import org.eclipse.cdt.ui.CUIPlugin;
/**
* A template context for plain file resources.
*
* @since 5.0
*/
public class FileTemplateContext extends TemplateContext {
private String fLineDelimiter;
public FileTemplateContext(String contextTypeId, String lineDelimiter) {
super(CUIPlugin.getDefault().getCodeTemplateContextRegistry().getContextType(contextTypeId));
fLineDelimiter= lineDelimiter;
}
/*
* @see org.eclipse.jface.text.templates.TemplateContext#evaluate(org.eclipse.jface.text.templates.Template)
*/
@Override
public TemplateBuffer evaluate(Template template) throws BadLocationException, TemplateException {
// test that all variables are defined
Iterator<?> iterator= getContextType().resolvers();
while (iterator.hasNext()) {
TemplateVariableResolver var= (TemplateVariableResolver) iterator.next();
if (var.getClass() == FileTemplateContextType.FileTemplateVariableResolver.class) {
Assert.isNotNull(getVariable(var.getType()), "Variable " + var.getType() + " not defined"); //$NON-NLS-1$ //$NON-NLS-2$
}
}
if (!canEvaluate(template))
return null;
String pattern= changeLineDelimiter(template.getPattern(), fLineDelimiter);
TemplateTranslator translator= new TemplateTranslator();
TemplateBuffer buffer= translator.translate(pattern);
getContextType().resolve(buffer, this);
return buffer;
}
private static String changeLineDelimiter(String code, String lineDelim) {
try {
ILineTracker tracker= new DefaultLineTracker();
tracker.set(code);
int nLines= tracker.getNumberOfLines();
if (nLines == 1) {
return code;
}
StringBuilder buf= new StringBuilder();
for (int i= 0; i < nLines; i++) {
if (i != 0) {
buf.append(lineDelim);
}
IRegion region = tracker.getLineInformation(i);
String line= code.substring(region.getOffset(), region.getOffset() + region.getLength());
buf.append(line);
}
return buf.toString();
} catch (BadLocationException e) {
// can not happen
return code;
}
}
/*
* @see org.eclipse.jface.text.templates.TemplateContext#canEvaluate(org.eclipse.jface.text.templates.Template)
*/
@Override
public boolean canEvaluate(Template template) {
return true;
}
public void setResourceVariables(IFile file) {
setVariable(FileTemplateContextType.FILENAME, file.getName());
setVariable(FileTemplateContextType.FILEBASE, new Path(file.getName()).removeFileExtension().lastSegment());
IPath location= file.getLocation();
setVariable(FileTemplateContextType.FILELOCATION, location != null ? location.toOSString() : ""); //$NON-NLS-1$
setVariable(FileTemplateContextType.FILEPATH, file.getFullPath().toString());
setVariable(FileTemplateContextType.PROJECTNAME, file.getProject().getName());
}
}
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