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/*******************************************************************************
* Copyright (c) 2005, 2012 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
* QNX Software Systems
* Anton Leherbauer (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.corext.template.c;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.TextUtilities;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.TemplateBuffer;
import org.eclipse.jface.text.templates.TemplateContextType;
import org.eclipse.jface.text.templates.TemplateException;
import org.eclipse.jface.text.templates.TemplateTranslator;
import org.eclipse.cdt.core.model.ICProject;
import org.eclipse.cdt.core.model.ITranslationUnit;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.ui.PreferenceConstants;
/**
* A context for C/C++.
*/
public class CContext extends TranslationUnitContext {
/**
* Creates a C/C++ code template context.
*
* @param type the context type
* @param document the document
* @param completionOffset the completion position within the document
* @param completionLength the length of the context
* @param translationUnit the translation unit represented by the document
*/
public CContext(TemplateContextType type, IDocument document, int completionOffset, int completionLength,
ITranslationUnit translationUnit) {
super(type, document, completionOffset, completionLength, translationUnit);
}
/**
* Creates a C/C++ code template context.
*
* @param type the context type.
* @param document the document.
* @param completionPosition the completion position within the document
* @param translationUnit the translation unit (may be <code>null</code>).
*/
public CContext(TemplateContextType type, IDocument document, Position completionPosition,
ITranslationUnit translationUnit) {
super(type, document, completionPosition, translationUnit);
}
@Override
public int getStart() {
if (fIsManaged && getCompletionLength() > 0)
return super.getStart();
try {
IDocument document = getDocument();
int start = getCompletionOffset();
int end = getCompletionOffset() + getCompletionLength();
while (start != 0 && isUnicodeIdentifierPartOrPoundSign(document.getChar(start - 1)))
start--;
while (start != end && Character.isWhitespace(document.getChar(start)))
start++;
if (start == end)
start = getCompletionOffset();
return start;
} catch (BadLocationException e) {
return super.getStart();
}
}
@Override
public int getEnd() {
if (fIsManaged || getCompletionLength() == 0)
return super.getEnd();
try {
IDocument document = getDocument();
int start = getCompletionOffset();
int end = getCompletionOffset() + getCompletionLength();
while (start != end && Character.isWhitespace(document.getChar(end - 1)))
end--;
return end;
} catch (BadLocationException e) {
return super.getEnd();
}
}
@Override
public TemplateBuffer evaluate(Template template) throws BadLocationException, TemplateException {
if (!canEvaluate(template))
return null;
TemplateTranslator translator = new TemplateTranslator();
TemplateBuffer buffer = translator.translate(template.getPattern());
getContextType().resolve(buffer, this);
IPreferenceStore prefs = CUIPlugin.getDefault().getPreferenceStore();
boolean useCodeFormatter = prefs.getBoolean(PreferenceConstants.TEMPLATES_USE_CODEFORMATTER);
ICProject project = getCProject();
int indentationLevel = isReadOnly() ? 0 : getIndentationLevel();
CFormatter formatter = new CFormatter(TextUtilities.getDefaultLineDelimiter(getDocument()), indentationLevel,
useCodeFormatter, project);
formatter.format(buffer, this);
return buffer;
}
private boolean isUnicodeIdentifierPartOrPoundSign(char c) {
return Character.isUnicodeIdentifierPart(c) || c == '#';
}
}
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