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/*
* Copyright (c) 2014, 2015 QNX Software Systems 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
*/
package org.eclipse.cdt.internal.qt.core.codan;
import java.util.Collection;
import org.eclipse.cdt.codan.core.cxx.model.AbstractIndexAstChecker;
import org.eclipse.cdt.codan.core.model.CheckerLaunchMode;
import org.eclipse.cdt.codan.core.model.ICheckerWithPreferences;
import org.eclipse.cdt.codan.core.model.IProblemWorkingCopy;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTFunctionCallExpression;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.internal.qt.core.ASTUtil;
import org.eclipse.cdt.internal.qt.core.QtFunctionCall;
import org.eclipse.cdt.internal.qt.core.QtMethodReference;
import org.eclipse.cdt.internal.qt.core.QtNature;
import org.eclipse.cdt.internal.qt.core.Activator;
import org.eclipse.cdt.internal.qt.core.index.IQMethod;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.osgi.util.NLS;
/**
* A Codan checker for QObject::connect and QObject::disconnect function calls. The checker
* confirms that SIGNAL and SLOT macro expansions reference a valid Qt signal or slot.
*/
public class QtSyntaxChecker extends AbstractIndexAstChecker implements ICheckerWithPreferences {
private final Checker checker = new Checker();
@Override
public boolean runInEditor() {
return true;
}
@Override
public void initPreferences(IProblemWorkingCopy problem) {
// don't run on full or incremental builds
getTopLevelPreference(problem);
getLaunchModePreference(problem).enableInLaunchModes(
CheckerLaunchMode.RUN_ON_FILE_OPEN,
CheckerLaunchMode.RUN_AS_YOU_TYPE,
CheckerLaunchMode.RUN_ON_DEMAND );
}
@Override
public synchronized boolean processResource(IResource resource) throws OperationCanceledException {
if (QtNature.hasNature(resource.getProject()))
return super.processResource(resource);
return false;
}
@Override
public void processAst(IASTTranslationUnit ast) {
// Run the checker only on Qt-enabled projects.
if (QtNature.hasNature(ASTUtil.getProject(ast)))
ast.accept(checker);
}
private class Checker extends ASTVisitor {
public Checker() {
shouldVisitExpressions = true;
}
@Override
public int visit(IASTExpression expr) {
if (!(expr instanceof IASTFunctionCallExpression))
return PROCESS_CONTINUE;
IASTFunctionCallExpression fncall = (IASTFunctionCallExpression) expr;
Collection<QtMethodReference> refs = QtFunctionCall.getReferences(fncall);
if (refs != null)
for(QtMethodReference ref : refs) {
IQMethod method = ref.getMethod();
if (method != null)
continue;
// Either the macro expansion didn't have an argument, or the argument was not a valid method.
if (ref.getRawSignature().isEmpty())
report(ref, Messages.QtConnect_macro_without_method_1, ref.getType().macroName);
else
report(ref, Messages.QtConnect_macro_method_not_found_3, ref.getType().paramName, ref.getContainingType().getName(), ref.getRawSignature());
}
return PROCESS_CONTINUE;
}
private void report(IASTNode node, String message, Object... args) {
if (args.length <= 0)
reportProblem(Activator.QT_SYNTAX_ERR_ID, node, message);
else
reportProblem(Activator.QT_SYNTAX_ERR_ID, node, NLS.bind(message, args));
}
};
}
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