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/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core.manipulation;
import java.util.Iterator;
import org.eclipse.core.runtime.Assert;
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.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.manipulation.JavaManipulation;
public class CodeTemplateContext extends TemplateContext {
private String fLineDelimiter;
private IJavaProject fProject;
public CodeTemplateContext(String contextTypeName, IJavaProject project, String lineDelim) {
super(JavaManipulation.getCodeTemplateContextRegistry().getContextType(contextTypeName));
fLineDelimiter= lineDelim;
fProject= project;
}
public IJavaProject getJavaProject() {
return fProject;
}
/*
* @see org.eclipse.jdt.internal.corext.template.TemplateContext#evaluate(org.eclipse.jdt.internal.corext.template.Template)
*/
@Override
public TemplateBuffer evaluate(Template template) throws BadLocationException, TemplateException {
// test that all variables are defined
Iterator<TemplateVariableResolver> iterator= getContextType().resolvers();
while (iterator.hasNext()) {
TemplateVariableResolver var= iterator.next();
if (var instanceof CodeTemplateContextType.CodeTemplateVariableResolver) {
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;
}
}
@Override
public boolean canEvaluate(Template template) {
return true;
}
public void setCompilationUnitVariables(ICompilationUnit cu) {
setVariable(CodeTemplateContextType.FILENAME, cu.getElementName());
setVariable(CodeTemplateContextType.PACKAGENAME, cu.getParent().getElementName());
setVariable(CodeTemplateContextType.PROJECTNAME, cu.getJavaProject().getElementName());
}
}
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