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/*******************************************************************************
* Copyright (c) 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.ui.editor;
import java.io.File;
import java.util.Collection;
import javax.script.ScriptException;
import org.eclipse.cdt.internal.qt.ui.Activator;
import org.eclipse.cdt.qt.core.IQMLAnalyzer;
import org.eclipse.cdt.qt.core.QMLTernCompletion;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.CompletionProposal;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContextInformation;
import org.eclipse.jface.text.contentassist.IContextInformationValidator;
import org.eclipse.ui.IFileEditorInput;
public class QMLContentAssistProcessor implements IContentAssistProcessor {
private static final IContextInformation[] NO_CONTEXTS = {};
private static final ICompletionProposal[] NO_COMPLETIONS = {};
private final IQMLAnalyzer analyzer = Activator.getService(IQMLAnalyzer.class);
private final QMLEditor editor;
public QMLContentAssistProcessor(QMLEditor editor) {
this.editor = editor;
}
@Override
public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
if (analyzer == null || !analyzer.isSupported()) {
return NO_COMPLETIONS;
}
IDocument document = viewer.getDocument();
String prefix = lastWord(document, offset);
// Save the file
IFileEditorInput fileInput = (IFileEditorInput) editor.getEditorInput();
String fileName = new File(fileInput.getFile().getLocationURI()).getAbsolutePath();
try {
String contents = document.get();
Collection<QMLTernCompletion> completions = analyzer.getCompletions(fileName, contents, offset);
if (!completions.isEmpty()) {
ICompletionProposal[] proposals = new ICompletionProposal[completions.size()];
int i = 0;
for (QMLTernCompletion completion : completions) {
String name = completion.getName();
String type = completion.getType();
String displayString = name;
if (type != null) {
displayString += " : " + completion.getType(); //$NON-NLS-1$
}
proposals[i++] = new CompletionProposal(name, offset - prefix.length(), prefix.length(),
name.length(), null, displayString, null, completion.getOrigin());
}
return proposals;
}
} catch (NoSuchMethodException | ScriptException e) {
Activator.log(e);
}
return NO_COMPLETIONS;
}
private String lastWord(IDocument document, int offset) {
try {
for (int n = offset - 1; n >= 0; n--) {
char c = document.getChar(n);
if (!Character.isJavaIdentifierPart(c)) {
return document.get(n + 1, offset - n - 1);
}
}
return document.get(0, offset);
} catch (BadLocationException e) {
Activator.log(e);
}
return ""; //$NON-NLS-1$
}
@Override
public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) {
return NO_CONTEXTS;
}
@Override
public char[] getCompletionProposalAutoActivationCharacters() {
return new char[] { '.' };
}
@Override
public char[] getContextInformationAutoActivationCharacters() {
// TODO not sure
return null;
}
@Override
public String getErrorMessage() {
// TODO Auto-generated method stub
return null;
}
@Override
public IContextInformationValidator getContextInformationValidator() {
// TODO Auto-generated method stub
return null;
}
}
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