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/*******************************************************************************
* Copyright (c) 2014 Jayant Gupta
* 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:
* Jayant Gupta (initial contribution)
*
*
*******************************************************************************/
package org.eclipse.etrice.ui.behavior.actioneditor.modelaware;
import org.eclipse.etrice.expressions.detailcode.IDetailExpressionProvider;
import org.eclipse.etrice.expressions.ui.highlight.ExpressionRuleFactory;
import org.eclipse.etrice.expressions.ui.highlight.TargetLanguageRuleFactory;
import org.eclipse.etrice.ui.behavior.actioneditor.sourceviewer.ActionCodeAssistProcessor;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.ContentAssistant;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.presentation.IPresentationReconciler;
import org.eclipse.jface.text.presentation.PresentationReconciler;
import org.eclipse.jface.text.rules.DefaultDamagerRepairer;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.ITokenScanner;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import com.google.common.collect.Iterables;
/**
* An extension of {@link ActionCodeEditorConfiguration} with adds to it a model
* cum language(general) aware scanner and model aware content assist processor.
*
* @author jayant
*/
public class ModelAwareActionCodeEditorConfiguration extends SourceViewerConfiguration {
/** token scanner for syntax highlighting */
private RuleBasedScanner tokenScanner;
/** content assist processor for content assistance */
private ActionCodeAssistProcessor actionCodeAssistProcessor;
private IDetailExpressionProvider exprProvider;
public ModelAwareActionCodeEditorConfiguration(IDetailExpressionProvider exprProvider) {
this.exprProvider = exprProvider;
}
/**
* Constructs and returns an instance of the {@link ITokenScanner}. Same
* instance of the scanner is returned on subsequent invocations.
*
* @return the token scanner for the configuration
*/
private RuleBasedScanner getTokenScanner() {
if (tokenScanner == null) {
JFaceHighlightStyles styles = new JFaceHighlightStyles();
tokenScanner = new RuleBasedScanner();
tokenScanner.setRules(Iterables.toArray(Iterables.concat(
TargetLanguageRuleFactory.getGeneralLiteralRules(styles),
ExpressionRuleFactory.getInitialExpressionRules(exprProvider, styles),
TargetLanguageRuleFactory.getGeneralKeywordRules(styles))
, IRule.class));
tokenScanner.setDefaultReturnToken(new Token(styles.getDefault()));
}
return tokenScanner;
}
/**
* Constructs and returns an instance of the {@link IContentAssistProcessor}
* . Same instance of the processor is returned on subsequent invocations.
*
* @return the content assist processor for the configuration
*/
private ActionCodeAssistProcessor getContextAssistProcessor() {
if (actionCodeAssistProcessor == null) {
actionCodeAssistProcessor = new ActionCodeAssistProcessor(exprProvider);
}
return actionCodeAssistProcessor;
}
public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) {
PresentationReconciler reconciler = new PresentationReconciler();
DefaultDamagerRepairer dr = new DefaultDamagerRepairer(getTokenScanner());
reconciler.setDamager(dr, IDocument.DEFAULT_CONTENT_TYPE);
reconciler.setRepairer(dr, IDocument.DEFAULT_CONTENT_TYPE);
return reconciler;
}
public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
ContentAssistant assistant = new ContentAssistant();
assistant.setContentAssistProcessor(getContextAssistProcessor(), IDocument.DEFAULT_CONTENT_TYPE);
assistant.setEmptyMessage("No Proposals.");
assistant.enableAutoActivation(true);
assistant.setAutoActivationDelay(500);
return assistant;
}
}
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