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/*******************************************************************************
* Copyright (c) 2000, 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
* Sebastian Davids <sdavids@gmx.de> - Bug 37432 getInvertEqualsProposal
* Benjamin Muskalla <b.muskalla@gmx.net> - Bug 36350 convertToStringBufferPropsal
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.text.correction;
import java.util.ArrayList;
import java.util.Collection;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNodeSelector;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.model.ILanguage;
import org.eclipse.cdt.internal.core.model.ASTCache.ASTRunnable;
import org.eclipse.cdt.internal.ui.editor.ASTProvider;
import org.eclipse.cdt.internal.ui.editor.CEditor;
import org.eclipse.cdt.internal.ui.text.correction.proposals.LinkedNamesAssistProposal;
import org.eclipse.cdt.internal.ui.text.correction.proposals.RenameRefactoringProposal;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.ui.text.ICCompletionProposal;
import org.eclipse.cdt.ui.text.IInvocationContext;
import org.eclipse.cdt.ui.text.IProblemLocation;
import org.eclipse.cdt.ui.text.IQuickAssistProcessor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.ui.IEditorPart;
/**
* see org.eclipse.cdt.ui.text.IQuickAssistProcessor
*/
public class QuickAssistProcessor implements IQuickAssistProcessor {
public QuickAssistProcessor() {
super();
}
@Override
public boolean hasAssists(final IInvocationContext context) throws CoreException {
IStatus status = ASTProvider.getASTProvider().runOnAST(context.getTranslationUnit(),
ASTProvider.WAIT_ACTIVE_ONLY, new NullProgressMonitor(), new ASTRunnable() {
@Override
public IStatus runOnAST(ILanguage lang, IASTTranslationUnit astRoot) throws CoreException {
IASTNodeSelector selector = astRoot.getNodeSelector(null);
IASTName name = selector.findEnclosingName(context.getSelectionOffset(),
context.getSelectionLength());
// Activate the proposal only if a simple name is selected.
if (name != null && name == name.getLastName()) {
IBinding binding = name.resolveBinding();
if (binding != null) {
return Status.OK_STATUS;
}
}
return Status.CANCEL_STATUS;
}
});
return status.isOK();
}
@Override
public ICCompletionProposal[] getAssists(final IInvocationContext context,
final IProblemLocation[] problemLocations) throws CoreException {
final ArrayList<ICCompletionProposal> proposals = new ArrayList<>();
ASTProvider.getASTProvider().runOnAST(context.getTranslationUnit(), ASTProvider.WAIT_ACTIVE_ONLY,
new NullProgressMonitor(), new ASTRunnable() {
@Override
public IStatus runOnAST(ILanguage lang, IASTTranslationUnit astRoot) throws CoreException {
if (astRoot == null) {
return Status.CANCEL_STATUS;
}
IASTNodeSelector selector = astRoot.getNodeSelector(null);
IASTName name = selector.findEnclosingName(context.getSelectionOffset(),
context.getSelectionLength());
// Activate the proposal only if a simple name is selected.
if (name != null && name == name.getLastName()) {
IBinding binding = name.resolveBinding();
if (binding != null) {
boolean noErrorsAtLocation = noErrorsAtLocation(problemLocations);
// Quick assists that show up also if there is an error/warning
getRenameLocalProposals(context, problemLocations, noErrorsAtLocation, proposals);
getRenameRefactoringProposal(context, problemLocations, noErrorsAtLocation, proposals);
}
}
return Status.OK_STATUS;
}
});
return proposals.isEmpty() ? null : proposals.toArray(new ICCompletionProposal[proposals.size()]);
}
private boolean noErrorsAtLocation(IProblemLocation[] locations) {
if (locations != null) {
for (int i = 0; i < locations.length; i++) {
if (locations[i].isError()) {
return false;
}
}
}
return true;
}
private static void getRenameLocalProposals(IInvocationContext context, IProblemLocation[] locations,
boolean noErrorsAtLocation, Collection<ICCompletionProposal> proposals) {
LinkedNamesAssistProposal proposal = new LinkedNamesAssistProposal(context.getTranslationUnit());
if (!noErrorsAtLocation) {
proposal.setRelevance(1);
}
proposals.add(proposal);
}
private static boolean getRenameRefactoringProposal(IInvocationContext context, IProblemLocation[] locations,
boolean noErrorsAtLocation, Collection<ICCompletionProposal> proposals) throws CoreException {
IEditorPart editor = CUIPlugin.getActivePage().getActiveEditor();
if (!(editor instanceof CEditor))
return false;
if (proposals == null) {
return true;
}
RenameRefactoringProposal proposal = new RenameRefactoringProposal((CEditor) editor);
if (!noErrorsAtLocation) {
proposal.setRelevance(1);
}
proposals.add(proposal);
return true;
}
}
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