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/*
* <copyright>
*
* Copyright (c) 2005-2006 Sven Efftinge (http://www.efftinge.de) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sven Efftinge (http://www.efftinge.de) - Initial API and implementation
*
* </copyright>
*/
package org.eclipse.xpand.ui.editor.codeassist;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.core.resources.IFile;
import org.eclipse.internal.xpand2.codeassist.ExpandProposalComputer;
import org.eclipse.internal.xpand2.codeassist.FastAnalyzer;
import org.eclipse.internal.xpand2.codeassist.KeywordProposalComputer;
import org.eclipse.internal.xpand2.codeassist.NamespaceProposalComputer;
import org.eclipse.internal.xpand2.codeassist.StatementProposalComputer;
import org.eclipse.internal.xpand2.codeassist.XpandPartition;
import org.eclipse.internal.xpand2.codeassist.XpandTokens;
import org.eclipse.internal.xpand2.model.XpandDefinition;
import org.eclipse.internal.xtend.expression.codeassist.ExpressionProposalComputer;
import org.eclipse.internal.xtend.expression.codeassist.ExtensionImportProposalComputer;
import org.eclipse.internal.xtend.expression.codeassist.ProposalFactory;
import org.eclipse.internal.xtend.expression.codeassist.TypeProposalComputer;
import org.eclipse.internal.xtend.xtend.XtendFile;
import org.eclipse.internal.xtend.xtend.codeassist.Partition;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.contentassist.IContextInformation;
import org.eclipse.jface.text.contentassist.IContextInformationValidator;
import org.eclipse.ui.IEditorPart;
import org.eclipse.xpand.ui.XpandEditorPlugin;
import org.eclipse.xpand.ui.core.IXpandResource;
import org.eclipse.xpand.ui.internal.XpandLog;
import org.eclipse.xpand2.XpandExecutionContext;
import org.eclipse.xtend.shared.ui.Activator;
import org.eclipse.xtend.shared.ui.core.IXtendXpandProject;
import org.eclipse.xtend.shared.ui.core.IXtendXpandResource;
import org.eclipse.xtend.shared.ui.expression.editor.codeassist.AbstractExtXptContentAssistProcessor;
import org.eclipse.xtend.shared.ui.expression.editor.codeassist.ProposalComparator;
/**
* Computes the Code Completion Proposals when CTRL+SPACE is pressed.
*
* @author Sven Efftinge (http://www.efftinge.de)
* @since 4.0
*/
public class XpandContentAssistProcessor extends AbstractExtXptContentAssistProcessor {
public XpandContentAssistProcessor(final IEditorPart editor) {
super(editor);
}
@Override
protected ICompletionProposal[] internalComputeCompletionProposals(final ITextViewer viewer,
final int documentOffset) {
try {
final String txt = viewer.getDocument().get().substring(0, documentOffset);
XpandDefinition[] defs = new XpandDefinition[0];
final IFile file = getFile();
final IXpandResource tpl = (IXpandResource) Activator.getExtXptModelManager().findExtXptResource(file);
if (tpl != null) {
defs = tpl.getDefinitions();
}
XpandExecutionContext ctx = XpandEditorPlugin.getExecutionContext(getJavaProject());
final Partition p = FastAnalyzer.computePartition(txt);
// Shortcut: No proposals within comments
if (p == Partition.COMMENT) {
return new ICompletionProposal[0];
}
List<Object> proposals = new ArrayList<Object>();
final ProposalFactory f = new XpandProposalFactoryEclipseImpl(documentOffset);
if (p == Partition.TYPE_DECLARATION) {
ctx = FastAnalyzer.computeExecutionContext(txt, ctx, defs);
proposals = new TypeProposalComputer().computeProposals(txt, ctx, f);
} else if (p == Partition.EXPRESSION) {
ctx = FastAnalyzer.computeExecutionContext(txt, ctx, defs);
// the current expression begins at the last opening Xpand
// bracket
final String expression = txt.substring(txt.lastIndexOf(XpandTokens.LT_CHAR));
proposals.addAll(new ExpressionProposalComputer().computeProposals(expression, ctx, f));
proposals.addAll(new KeywordProposalComputer().computeProposals(txt, ctx, f));
} else if (p == XpandPartition.EXPAND_STATEMENT) {
ctx = FastAnalyzer.computeExecutionContext(txt, ctx, defs);
proposals.addAll(new ExpandProposalComputer().computeProposals(txt, ctx, f));
proposals.add(new org.eclipse.jface.text.contentassist.CompletionProposal(XpandTokens.LT
+ XpandTokens.RT, documentOffset, 0, 1));
} else if (p == Partition.NAMESPACE_IMPORT) {
ctx = FastAnalyzer.computeExecutionContext(txt, ctx, defs);
proposals.addAll(new NamespaceProposalComputer().computeProposals(txt, ctx, f));
} else if (p == Partition.EXTENSION_IMPORT) {
IXtendXpandProject project = Activator.getExtXptModelManager().findProject(getFile());
IXtendXpandResource[] resources = project.getAllRegisteredResources();
Set<String> extensionNames = new HashSet<String>();
for (IXtendXpandResource resource : resources) {
if (resource instanceof XtendFile) {
extensionNames.add(resource.getFullyQualifiedName());
}
}
List<Object> extensionProposals = new ExtensionImportProposalComputer().computeProposals(txt, ctx, f, extensionNames);
proposals.addAll(extensionProposals);
} else if (p == Partition.DEFAULT) {
ctx = FastAnalyzer.computeExecutionContext(txt, ctx, defs);
proposals.addAll(new StatementProposalComputer().computeProposals(txt, ctx, f));
proposals.add(new org.eclipse.jface.text.contentassist.CompletionProposal(XpandTokens.LT
+ XpandTokens.RT, documentOffset, 0, 1));
}
Collections.sort(proposals, new ProposalComparator());
return proposals.toArray(new ICompletionProposal[proposals.size()]);
} catch (final Exception e) {
XpandLog.logError(e);
}
return null;
}
/**
* {@inheritDoc}
*/
public IContextInformation[] computeContextInformation(final ITextViewer viewer, final int documentOffset) {
return null;
}
/**
* {@inheritDoc}
*/
public char[] getCompletionProposalAutoActivationCharacters() {
return new char[] { '.', XpandTokens.LT_CHAR };
}
/**
* {@inheritDoc}
*/
public char[] getContextInformationAutoActivationCharacters() {
return null;
}
/**
* {@inheritDoc}
*/
public String getErrorMessage() {
return null;
}
/**
* {@inheritDoc}
*/
public IContextInformationValidator getContextInformationValidator() {
return null;
}
}
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