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/*******************************************************************************
* Copyright (c) 2005, 2015 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
* Anton Leherbauer (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.editor;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.ITextOperationTarget;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.cdt.internal.ui.text.contentassist.CompletionProposalCategory;
import org.eclipse.cdt.internal.ui.text.contentassist.CompletionProposalComputerRegistry;
/**
* A content assist executor can invoke content assist for a specific proposal category on an editor.
*
* @since 4.0
*/
public final class SpecificContentAssistExecutor {
private final CompletionProposalComputerRegistry fRegistry;
/**
* Creates a new executor.
*
* @param registry the computer registry to use for the enablement of proposal categories
*/
public SpecificContentAssistExecutor(CompletionProposalComputerRegistry registry) {
Assert.isNotNull(registry);
fRegistry= registry;
}
/**
* Invokes content assist on <code>editor</code>, showing only proposals computed by the
* <code>CompletionProposalCategory</code> with the given <code>categoryId</code>.
*
* @param editor the editor to invoke code assist on
* @param categoryId the id of the proposal category to show proposals for
*/
public void invokeContentAssist(final ITextEditor editor, String categoryId) {
Collection<CompletionProposalCategory> categories= fRegistry.getProposalCategories();
boolean[] inclusionState= new boolean[categories.size()];
boolean[] separateState= new boolean[categories.size()];
int i= 0;
for (Iterator<CompletionProposalCategory> it= categories.iterator(); it.hasNext(); i++) {
CompletionProposalCategory cat= it.next();
inclusionState[i]= cat.isIncluded();
cat.setIncluded(cat.getId().equals(categoryId));
separateState[i]= cat.isSeparateCommand();
cat.setSeparateCommand(false);
}
try {
ITextOperationTarget target= editor.getAdapter(ITextOperationTarget.class);
if (target != null && target.canDoOperation(ISourceViewer.CONTENTASSIST_PROPOSALS))
target.doOperation(ISourceViewer.CONTENTASSIST_PROPOSALS);
} finally {
i= 0;
for (Iterator<CompletionProposalCategory> it= categories.iterator(); it.hasNext(); i++) {
CompletionProposalCategory cat= it.next();
cat.setIncluded(inclusionState[i]);
cat.setSeparateCommand(separateState[i]);
}
}
}
}
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