core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/text/ScriptSourceViewerConfiguration.java - dltk/org.eclipse.dltk.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2007 IBM Corporation 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
  *

  *******************************************************************************/
 package org.eclipse.dltk.ui.text;

 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.dltk.internal.ui.editor.ModelElementHyperlinkDetector;
 import org.eclipse.dltk.internal.ui.editor.ScriptSourceViewer;
 import org.eclipse.dltk.internal.ui.text.HTMLTextPresenter;
 import org.eclipse.dltk.internal.ui.text.ScriptCompositeReconcilingStrategy;
 import org.eclipse.dltk.internal.ui.text.ScriptElementProvider;
 import org.eclipse.dltk.internal.ui.text.ScriptReconciler;
 import org.eclipse.dltk.internal.ui.text.hover.EditorTextHoverDescriptor;
 import org.eclipse.dltk.internal.ui.text.hover.EditorTextHoverProxy;
 import org.eclipse.dltk.internal.ui.text.hover.ScriptInformationProvider;
 import org.eclipse.dltk.ui.DLTKUIPlugin;
 import org.eclipse.dltk.ui.actions.IScriptEditorActionDefinitionIds;
 import org.eclipse.dltk.ui.text.completion.ContentAssistPreference;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.text.AbstractInformationControlManager;
 import org.eclipse.jface.text.DefaultInformationControl;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.IInformationControl;
 import org.eclipse.jface.text.IInformationControlCreator;
 import org.eclipse.jface.text.ITextHover;
 import org.eclipse.jface.text.ITextViewerExtension2;
 import org.eclipse.jface.text.contentassist.ContentAssistant;
 import org.eclipse.jface.text.contentassist.IContentAssistant;
 import org.eclipse.jface.text.hyperlink.IHyperlinkDetector;
 import org.eclipse.jface.text.information.IInformationPresenter;
 import org.eclipse.jface.text.information.IInformationProvider;
 import org.eclipse.jface.text.information.InformationPresenter;
 import org.eclipse.jface.text.reconciler.IReconciler;
 import org.eclipse.jface.text.source.ISourceViewer;
 import org.eclipse.jface.util.PropertyChangeEvent;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.editors.text.TextSourceViewerConfiguration;
 import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
 import org.eclipse.ui.texteditor.ITextEditor;

 public abstract class ScriptSourceViewerConfiguration extends
 		TextSourceViewerConfiguration {

 	private IColorManager fColorManager;
 	private ITextEditor fTextEditor;
 	private String fDocumentPartitioning;

 	public ScriptSourceViewerConfiguration(IColorManager colorManager,
 			IPreferenceStore preferenceStore, ITextEditor editor,
 			String partitioning) {
 		super(preferenceStore);

 		fColorManager = colorManager;
 		fTextEditor = editor;
 		fDocumentPartitioning = partitioning;

 		initializeScanners();
 	}

 	protected void initializeScanners() {

 	}

 	public String getConfiguredDocumentPartitioning(ISourceViewer sourceViewer) {
 		if (fDocumentPartitioning != null)
 			return fDocumentPartitioning;
 		return super.getConfiguredDocumentPartitioning(sourceViewer);
 	}

 	protected IColorManager getColorManager() {
 		return this.fColorManager;
 	}

 	public ITextEditor getEditor() {
 		return this.fTextEditor;
 	}

 	public IReconciler getReconciler(ISourceViewer sourceViewer) {
 		final ITextEditor editor = getEditor();
 		// if (editor != null && editor.isEditable()) {

 		ScriptCompositeReconcilingStrategy strategy = new ScriptCompositeReconcilingStrategy(
 				editor, getConfiguredDocumentPartitioning(sourceViewer));
 		ScriptReconciler reconciler = new ScriptReconciler(editor, strategy,
 				false);
 		reconciler.setIsIncrementalReconciler(false);
 		reconciler.setProgressMonitor(new NullProgressMonitor());
 		reconciler.setDelay(500);

 		return reconciler;
 		// }
 		// return null;
 	}

 	public  boolean affectsTextPresentation(PropertyChangeEvent event) {
 		return false;
 	}

 	public void handlePropertyChangeEvent(PropertyChangeEvent event) {

 	}

 	/*
 	 * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getDefaultPrefixes(org.eclipse.jface.text.source.ISourceViewer,
 	 *      java.lang.String)
 	 */
 	public String[] getDefaultPrefixes(ISourceViewer sourceViewer,
 			String contentType) {
 		return new String[] { getCommentPrefix(), "" }; //$NON-NLS-1$
 	}

 	/**
 	 * Returns the comment prefix.
 	 *
 	 * <p>
 	 * Default implementation returns a <code>#</code>, sub-classes may
 	 * override if their language uses a different prefix.
 	 * </p>
 	 */
 	protected String getCommentPrefix() {
 		return "#"; //$NON-NLS-1$
 	}

 	/**
 	 * Returns the outline presenter control creator. The creator is a factory
 	 * creating outline presenter controls for the given source viewer. This
 	 * implementation always returns a creator for
 	 * <code>ScriptOutlineInformationControl</code> instances.
 	 *
 	 * @param sourceViewer
 	 *            the source viewer to be configured by this configuration
 	 * @param commandId
 	 *            the ID of the command that opens this control
 	 * @return an information control creator
 	 *
 	 */
 	protected IInformationControlCreator getOutlinePresenterControlCreator(
 			ISourceViewer sourceViewer, final String commandId) {
 		return null;
 	}

 	public IInformationPresenter getOutlinePresenter(
 			ScriptSourceViewer sourceViewer, boolean doCodeResolve) {
 		InformationPresenter presenter;
 		if (doCodeResolve)
 			presenter = new InformationPresenter(
 					getOutlinePresenterControlCreator(sourceViewer,
 							IScriptEditorActionDefinitionIds.OPEN_STRUCTURE));
 		else
 			presenter = new InformationPresenter(
 					getOutlinePresenterControlCreator(sourceViewer,
 							IScriptEditorActionDefinitionIds.SHOW_OUTLINE));
 		presenter
 				.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
 		presenter.setAnchor(AbstractInformationControlManager.ANCHOR_GLOBAL);
 		IInformationProvider provider = new ScriptElementProvider(getEditor(),
 				doCodeResolve);
 		presenter.setInformationProvider(provider,
 				IDocument.DEFAULT_CONTENT_TYPE);
 		initializeQuickOutlineContexts(presenter, provider);

 		presenter.setSizeConstraints(50, 20, true, false);
 		return presenter;
 	}

 	protected void initializeQuickOutlineContexts(
 			InformationPresenter presenter, IInformationProvider provider) {
 	}

 	public IInformationPresenter getHierarchyPresenter(
 			ScriptSourceViewer viewer, boolean b) {
 		return null;
 	}

 	protected IDialogSettings getSettings(String sectionName) {
 		IDialogSettings settings = DLTKUIPlugin.getDefault()
 				.getDialogSettings().getSection(sectionName);
 		if (settings == null)
 			settings = DLTKUIPlugin.getDefault().getDialogSettings()
 					.addNewSection(sectionName);

 		return settings;
 	}

 	public IHyperlinkDetector[] getHyperlinkDetectors(ISourceViewer sourceViewer) {
 		if (!fPreferenceStore
 				.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_HYPERLINKS_ENABLED))
 			return null;

 		IHyperlinkDetector[] inheritedDetectors = super
 				.getHyperlinkDetectors(sourceViewer);

 		if (fTextEditor == null) {
 			return inheritedDetectors;
 		}

 		int inheritedDetectorsLength = inheritedDetectors != null ? inheritedDetectors.length
 				: 0;
 		IHyperlinkDetector[] detectors = new IHyperlinkDetector[inheritedDetectorsLength + 1];
 		detectors[0] = new ModelElementHyperlinkDetector(fTextEditor);
 		for (int i = 0; i < inheritedDetectorsLength; i++)
 			detectors[i + 1] = inheritedDetectors[i];

 		return detectors;
 	}

 	/*
 	 * @see SourceViewerConfiguration#getConfiguredTextHoverStateMasks(ISourceViewer,
 	 *      String)
 	 *
 	 */
 	public int[] getConfiguredTextHoverStateMasks(ISourceViewer sourceViewer,
 			String contentType) {
 		EditorTextHoverDescriptor[] hoverDescs = DLTKUIPlugin.getDefault()
 				.getEditorTextHoverDescriptors(fPreferenceStore);
 		int stateMasks[] = new int[hoverDescs.length];
 		int stateMasksLength = 0;
 		for (int i = 0; i < hoverDescs.length; i++) {
 			if (hoverDescs[i].isEnabled()) {
 				int j = 0;
 				int stateMask = hoverDescs[i].getStateMask();
 				while (j < stateMasksLength) {
 					if (stateMasks[j] == stateMask)
 						break;
 					j++;
 				}
 				if (j == stateMasksLength)
 					stateMasks[stateMasksLength++] = stateMask;
 			}
 		}
 		if (stateMasksLength == hoverDescs.length)
 			return stateMasks;

 		int[] shortenedStateMasks = new int[stateMasksLength];
 		System.arraycopy(stateMasks, 0, shortenedStateMasks, 0,
 				stateMasksLength);
 		return shortenedStateMasks;
 	}

 	/*
 	 * @see SourceViewerConfiguration#getTextHover(ISourceViewer, String, int)
 	 *
 	 */
 	public ITextHover getTextHover(ISourceViewer sourceViewer,
 			String contentType, int stateMask) {
 		EditorTextHoverDescriptor[] hoverDescs = DLTKUIPlugin.getDefault()
 				.getEditorTextHoverDescriptors(fPreferenceStore);
 		int i = 0;
 		while (i < hoverDescs.length) {
 			if (hoverDescs[i].isEnabled()
 					&& hoverDescs[i].getStateMask() == stateMask)
 				return new EditorTextHoverProxy(hoverDescs[i], getEditor(),
 						fPreferenceStore);
 			i++;
 		}

 		return null;
 	}

 	public ITextHover getTextHover(ISourceViewer sourceViewer,
 			String contentType) {
 		return getTextHover(sourceViewer, contentType,
 				ITextViewerExtension2.DEFAULT_HOVER_STATE_MASK);
 	}

 	/**
 	 * Returns the information presenter control creator. The creator is a
 	 * factory creating the presenter controls for the given source viewer. This
 	 * implementation always returns a creator for
 	 * <code>DefaultInformationControl</code> instances.
 	 *
 	 * @param sourceViewer
 	 *            the source viewer to be configured by this configuration
 	 * @return an information control creator
 	 *
 	 */
 	private IInformationControlCreator getInformationPresenterControlCreator(
 			ISourceViewer sourceViewer) {
 		return new IInformationControlCreator() {
 			public IInformationControl createInformationControl(Shell parent) {
 				int shellStyle = SWT.RESIZE | SWT.TOOL;
 				int style = SWT.V_SCROLL | SWT.H_SCROLL;
 				return new DefaultInformationControl(parent, shellStyle, style,
 						new HTMLTextPresenter(false));
 			}
 		};
 	}

 	public IInformationPresenter getInformationPresenter(
 			ISourceViewer sourceViewer) {
 		InformationPresenter presenter = new InformationPresenter(
 				getInformationPresenterControlCreator(sourceViewer));
 		presenter
 				.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
 		IInformationProvider provider = new ScriptInformationProvider(
 				getEditor());
 		presenter.setInformationProvider(provider,
 				IDocument.DEFAULT_CONTENT_TYPE);

 		presenter.setSizeConstraints(60, 10, true, true);
 		return presenter;
 	}

 	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
 		if (getEditor() != null) {
 			ContentAssistant assistant = new ContentAssistant();

 			assistant
 					.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
 			assistant
 					.setRestoreCompletionProposalSize(getSettings("completion_proposal_size")); //$NON-NLS-1$
 			assistant
 					.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE);
 			assistant
 					.setInformationControlCreator(getInformationControlCreator(sourceViewer));

 			alterContentAssistant(assistant);

 			getContentAssistPreference().configure(assistant, fPreferenceStore);


 			return assistant;
 		}

 		return null;
 	}

 	protected abstract ContentAssistPreference getContentAssistPreference();

 	protected void alterContentAssistant(ContentAssistant assistant) {
 		// empty implementation
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2007 IBM Corporation 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
	*

	*******************************************************************************/
	package org.eclipse.dltk.ui.text;

	import org.eclipse.core.runtime.NullProgressMonitor;
	import org.eclipse.dltk.internal.ui.editor.ModelElementHyperlinkDetector;
	import org.eclipse.dltk.internal.ui.editor.ScriptSourceViewer;
	import org.eclipse.dltk.internal.ui.text.HTMLTextPresenter;
	import org.eclipse.dltk.internal.ui.text.ScriptCompositeReconcilingStrategy;
	import org.eclipse.dltk.internal.ui.text.ScriptElementProvider;
	import org.eclipse.dltk.internal.ui.text.ScriptReconciler;
	import org.eclipse.dltk.internal.ui.text.hover.EditorTextHoverDescriptor;
	import org.eclipse.dltk.internal.ui.text.hover.EditorTextHoverProxy;
	import org.eclipse.dltk.internal.ui.text.hover.ScriptInformationProvider;
	import org.eclipse.dltk.ui.DLTKUIPlugin;
	import org.eclipse.dltk.ui.actions.IScriptEditorActionDefinitionIds;
	import org.eclipse.dltk.ui.text.completion.ContentAssistPreference;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.text.AbstractInformationControlManager;
	import org.eclipse.jface.text.DefaultInformationControl;
	import org.eclipse.jface.text.IDocument;
	import org.eclipse.jface.text.IInformationControl;
	import org.eclipse.jface.text.IInformationControlCreator;
	import org.eclipse.jface.text.ITextHover;
	import org.eclipse.jface.text.ITextViewerExtension2;
	import org.eclipse.jface.text.contentassist.ContentAssistant;
	import org.eclipse.jface.text.contentassist.IContentAssistant;
	import org.eclipse.jface.text.hyperlink.IHyperlinkDetector;
	import org.eclipse.jface.text.information.IInformationPresenter;
	import org.eclipse.jface.text.information.IInformationProvider;
	import org.eclipse.jface.text.information.InformationPresenter;
	import org.eclipse.jface.text.reconciler.IReconciler;
	import org.eclipse.jface.text.source.ISourceViewer;
	import org.eclipse.jface.util.PropertyChangeEvent;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.editors.text.TextSourceViewerConfiguration;
	import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
	import org.eclipse.ui.texteditor.ITextEditor;

	public abstract class ScriptSourceViewerConfiguration extends
	TextSourceViewerConfiguration {

	private IColorManager fColorManager;
	private ITextEditor fTextEditor;
	private String fDocumentPartitioning;

	public ScriptSourceViewerConfiguration(IColorManager colorManager,
	IPreferenceStore preferenceStore, ITextEditor editor,
	String partitioning) {
	super(preferenceStore);

	fColorManager = colorManager;
	fTextEditor = editor;
	fDocumentPartitioning = partitioning;

	initializeScanners();
	}

	protected void initializeScanners() {

	}

	public String getConfiguredDocumentPartitioning(ISourceViewer sourceViewer) {
	if (fDocumentPartitioning != null)
	return fDocumentPartitioning;
	return super.getConfiguredDocumentPartitioning(sourceViewer);
	}

	protected IColorManager getColorManager() {
	return this.fColorManager;
	}

	public ITextEditor getEditor() {
	return this.fTextEditor;
	}

	public IReconciler getReconciler(ISourceViewer sourceViewer) {
	final ITextEditor editor = getEditor();
	// if (editor != null && editor.isEditable()) {

	ScriptCompositeReconcilingStrategy strategy = new ScriptCompositeReconcilingStrategy(
	editor, getConfiguredDocumentPartitioning(sourceViewer));
	ScriptReconciler reconciler = new ScriptReconciler(editor, strategy,
	false);
	reconciler.setIsIncrementalReconciler(false);
	reconciler.setProgressMonitor(new NullProgressMonitor());
	reconciler.setDelay(500);

	return reconciler;
	// }
	// return null;
	}

	public boolean affectsTextPresentation(PropertyChangeEvent event) {
	return false;
	}

	public void handlePropertyChangeEvent(PropertyChangeEvent event) {

	}

	/*
	* @see org.eclipse.jface.text.source.SourceViewerConfiguration#getDefaultPrefixes(org.eclipse.jface.text.source.ISourceViewer,
	* java.lang.String)
	*/
	public String[] getDefaultPrefixes(ISourceViewer sourceViewer,
	String contentType) {
	return new String[] { getCommentPrefix(), "" }; //$NON-NLS-1$
	}

	/**
	* Returns the comment prefix.
	*
	* <p>
	* Default implementation returns a <code>#</code>, sub-classes may
	* override if their language uses a different prefix.
	* </p>
	*/
	protected String getCommentPrefix() {
	return "#"; //$NON-NLS-1$
	}

	/**
	* Returns the outline presenter control creator. The creator is a factory
	* creating outline presenter controls for the given source viewer. This
	* implementation always returns a creator for
	* <code>ScriptOutlineInformationControl</code> instances.
	*
	* @param sourceViewer
	* the source viewer to be configured by this configuration
	* @param commandId
	* the ID of the command that opens this control
	* @return an information control creator
	*
	*/
	protected IInformationControlCreator getOutlinePresenterControlCreator(
	ISourceViewer sourceViewer, final String commandId) {
	return null;
	}

	public IInformationPresenter getOutlinePresenter(
	ScriptSourceViewer sourceViewer, boolean doCodeResolve) {
	InformationPresenter presenter;
	if (doCodeResolve)
	presenter = new InformationPresenter(
	getOutlinePresenterControlCreator(sourceViewer,
	IScriptEditorActionDefinitionIds.OPEN_STRUCTURE));
	else
	presenter = new InformationPresenter(
	getOutlinePresenterControlCreator(sourceViewer,
	IScriptEditorActionDefinitionIds.SHOW_OUTLINE));
	presenter
	.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
	presenter.setAnchor(AbstractInformationControlManager.ANCHOR_GLOBAL);
	IInformationProvider provider = new ScriptElementProvider(getEditor(),
	doCodeResolve);
	presenter.setInformationProvider(provider,
	IDocument.DEFAULT_CONTENT_TYPE);
	initializeQuickOutlineContexts(presenter, provider);

	presenter.setSizeConstraints(50, 20, true, false);
	return presenter;
	}

	protected void initializeQuickOutlineContexts(
	InformationPresenter presenter, IInformationProvider provider) {
	}

	public IInformationPresenter getHierarchyPresenter(
	ScriptSourceViewer viewer, boolean b) {
	return null;
	}

	protected IDialogSettings getSettings(String sectionName) {
	IDialogSettings settings = DLTKUIPlugin.getDefault()
	.getDialogSettings().getSection(sectionName);
	if (settings == null)
	settings = DLTKUIPlugin.getDefault().getDialogSettings()
	.addNewSection(sectionName);

	return settings;
	}

	public IHyperlinkDetector[] getHyperlinkDetectors(ISourceViewer sourceViewer) {
	if (!fPreferenceStore
	.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_HYPERLINKS_ENABLED))
	return null;

	IHyperlinkDetector[] inheritedDetectors = super
	.getHyperlinkDetectors(sourceViewer);

	if (fTextEditor == null) {
	return inheritedDetectors;
	}

	int inheritedDetectorsLength = inheritedDetectors != null ? inheritedDetectors.length
	: 0;
	IHyperlinkDetector[] detectors = new IHyperlinkDetector[inheritedDetectorsLength + 1];
	detectors[0] = new ModelElementHyperlinkDetector(fTextEditor);
	for (int i = 0; i < inheritedDetectorsLength; i++)
	detectors[i + 1] = inheritedDetectors[i];

	return detectors;
	}

	/*
	* @see SourceViewerConfiguration#getConfiguredTextHoverStateMasks(ISourceViewer,
	* String)
	*
	*/
	public int[] getConfiguredTextHoverStateMasks(ISourceViewer sourceViewer,
	String contentType) {
	EditorTextHoverDescriptor[] hoverDescs = DLTKUIPlugin.getDefault()
	.getEditorTextHoverDescriptors(fPreferenceStore);
	int stateMasks[] = new int[hoverDescs.length];
	int stateMasksLength = 0;
	for (int i = 0; i < hoverDescs.length; i++) {
	if (hoverDescs[i].isEnabled()) {
	int j = 0;
	int stateMask = hoverDescs[i].getStateMask();
	while (j < stateMasksLength) {
	if (stateMasks[j] == stateMask)
	break;
	j++;
	}
	if (j == stateMasksLength)
	stateMasks[stateMasksLength++] = stateMask;
	}
	}
	if (stateMasksLength == hoverDescs.length)
	return stateMasks;

	int[] shortenedStateMasks = new int[stateMasksLength];
	System.arraycopy(stateMasks, 0, shortenedStateMasks, 0,
	stateMasksLength);
	return shortenedStateMasks;
	}

	/*
	* @see SourceViewerConfiguration#getTextHover(ISourceViewer, String, int)
	*
	*/
	public ITextHover getTextHover(ISourceViewer sourceViewer,
	String contentType, int stateMask) {
	EditorTextHoverDescriptor[] hoverDescs = DLTKUIPlugin.getDefault()
	.getEditorTextHoverDescriptors(fPreferenceStore);
	int i = 0;
	while (i < hoverDescs.length) {
	if (hoverDescs[i].isEnabled()
	&& hoverDescs[i].getStateMask() == stateMask)
	return new EditorTextHoverProxy(hoverDescs[i], getEditor(),
	fPreferenceStore);
	i++;
	}

	return null;
	}

	public ITextHover getTextHover(ISourceViewer sourceViewer,
	String contentType) {
	return getTextHover(sourceViewer, contentType,
	ITextViewerExtension2.DEFAULT_HOVER_STATE_MASK);
	}

	/**
	* Returns the information presenter control creator. The creator is a
	* factory creating the presenter controls for the given source viewer. This
	* implementation always returns a creator for
	* <code>DefaultInformationControl</code> instances.
	*
	* @param sourceViewer
	* the source viewer to be configured by this configuration
	* @return an information control creator
	*
	*/
	private IInformationControlCreator getInformationPresenterControlCreator(
	ISourceViewer sourceViewer) {
	return new IInformationControlCreator() {
	public IInformationControl createInformationControl(Shell parent) {
	int shellStyle = SWT.RESIZE \| SWT.TOOL;
	int style = SWT.V_SCROLL \| SWT.H_SCROLL;
	return new DefaultInformationControl(parent, shellStyle, style,
	new HTMLTextPresenter(false));
	}
	};
	}

	public IInformationPresenter getInformationPresenter(
	ISourceViewer sourceViewer) {
	InformationPresenter presenter = new InformationPresenter(
	getInformationPresenterControlCreator(sourceViewer));
	presenter
	.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
	IInformationProvider provider = new ScriptInformationProvider(
	getEditor());
	presenter.setInformationProvider(provider,
	IDocument.DEFAULT_CONTENT_TYPE);

	presenter.setSizeConstraints(60, 10, true, true);
	return presenter;
	}

	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
	if (getEditor() != null) {
	ContentAssistant assistant = new ContentAssistant();

	assistant
	.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
	assistant
	.setRestoreCompletionProposalSize(getSettings("completion_proposal_size")); //$NON-NLS-1$
	assistant
	.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE);
	assistant
	.setInformationControlCreator(getInformationControlCreator(sourceViewer));

	alterContentAssistant(assistant);

	getContentAssistPreference().configure(assistant, fPreferenceStore);


	return assistant;
	}

	return null;
	}

	protected abstract ContentAssistPreference getContentAssistPreference();

	protected void alterContentAssistant(ContentAssistant assistant) {
	// empty implementation
	}
	}