org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberChangeRulerColumn.java - platform/eclipse.platform.text - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 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
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jface.text.source;

 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;

 import org.eclipse.core.runtime.Assert;

 import org.eclipse.jface.internal.text.revisions.RevisionPainter;
 import org.eclipse.jface.internal.text.source.DiffPainter;
 import org.eclipse.jface.viewers.ISelectionProvider;

 import org.eclipse.jface.text.revisions.IRevisionListener;
 import org.eclipse.jface.text.revisions.IRevisionRulerColumn;
 import org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension;
 import org.eclipse.jface.text.revisions.RevisionInformation;

 /**
  * A vertical ruler column displaying line numbers and serving as a UI for quick diff.
  * Clients usually instantiate and configure object of this class.
  *
  * @since 3.0
  */
 public final class LineNumberChangeRulerColumn extends LineNumberRulerColumn implements IVerticalRulerInfo, IVerticalRulerInfoExtension, IChangeRulerColumn, IRevisionRulerColumn, IRevisionRulerColumnExtension {
 	/** The ruler's annotation model. */
 	private IAnnotationModel fAnnotationModel;
 	/** <code>true</code> if changes should be displayed using character indications instead of background colors. */
 	private boolean fCharacterDisplay;
 	/**
 	 * The revision painter strategy.
 	 *
 	 * @since 3.2
 	 */
 	private final RevisionPainter fRevisionPainter;
 	/**
 	 * The diff information painter strategy.
 	 *
 	 * @since 3.2
 	 */
 	private final DiffPainter fDiffPainter;
 	/**
 	 * Whether to show number or to behave like a change ruler column.
 	 * @since 3.3
 	 */
 	private boolean fShowNumbers= true;

 	/**
 	 * Creates a new instance.
 	 *
 	 * @param sharedColors the shared colors provider to use
 	 */
 	public LineNumberChangeRulerColumn(ISharedTextColors sharedColors) {
 		Assert.isNotNull(sharedColors);
 		fRevisionPainter= new RevisionPainter(this, sharedColors);
 		fDiffPainter= new DiffPainter(this, sharedColors);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.LineNumberRulerColumn#createControl(org.eclipse.jface.text.source.CompositeRuler, org.eclipse.swt.widgets.Composite)
 	 */
 	public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
 		Control control= super.createControl(parentRuler, parentControl);
 		fRevisionPainter.setParentRuler(parentRuler);
 		fDiffPainter.setParentRuler(parentRuler);
 		return control;
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfo#getLineOfLastMouseButtonActivity()
 	 */
 	public int getLineOfLastMouseButtonActivity() {
 		return getParentRuler().getLineOfLastMouseButtonActivity();
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfo#toDocumentLineNumber(int)
 	 */
 	public int toDocumentLineNumber(int y_coordinate) {
 		return getParentRuler().toDocumentLineNumber(y_coordinate);
 	}

 	/*
 	 * @see IVerticalRulerColumn#setModel(IAnnotationModel)
 	 */
 	public void setModel(IAnnotationModel model) {
 		setAnnotationModel(model);
 		fRevisionPainter.setModel(model);
 		fDiffPainter.setModel(model);
 		updateNumberOfDigits();
 		computeIndentations();
 		layout(true);
 		postRedraw();
 	}

 	private void setAnnotationModel(IAnnotationModel model) {
 		if (fAnnotationModel != model)
 			fAnnotationModel= model;
 	}


 	/**
 	 * Sets the display mode of the ruler. If character mode is set to <code>true</code>, diff
 	 * information will be displayed textually on the line number ruler.
 	 *
 	 * @param characterMode <code>true</code> if diff information is to be displayed textually.
 	 */
 	public void setDisplayMode(boolean characterMode) {
 		if (characterMode != fCharacterDisplay) {
 			fCharacterDisplay= characterMode;
 			updateNumberOfDigits();
 			computeIndentations();
 			layout(true);
 		}
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#getModel()
 	 */
 	public IAnnotationModel getModel() {
 		return fAnnotationModel;
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.LineNumberRulerColumn#createDisplayString(int)
 	 */
 	protected String createDisplayString(int line) {
 		StringBuffer buffer= new StringBuffer();
 		if (fShowNumbers)
 			buffer.append(super.createDisplayString(line));
 		if (fCharacterDisplay && getModel() != null)
 			buffer.append(fDiffPainter.getDisplayCharacter(line));
 		return buffer.toString();
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.LineNumberRulerColumn#computeNumberOfDigits()
 	 */
 	protected int computeNumberOfDigits() {
 		int digits;
 		if (fCharacterDisplay && getModel() != null) {
 			if (fShowNumbers)
 				digits= super.computeNumberOfDigits() + 1;
 			else
 				digits= 1;
 		} else {
 			if (fShowNumbers)
 				digits= super.computeNumberOfDigits();
 			else
 				digits= 0;
 		}
 		if (fRevisionPainter.hasInformation())
 			digits+= fRevisionPainter.getRequiredWidth();
 		return digits;
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#addVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
 	 */
 	public void addVerticalRulerListener(IVerticalRulerListener listener) {
 		throw new UnsupportedOperationException();
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#removeVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
 	 */
 	public void removeVerticalRulerListener(IVerticalRulerListener listener) {
 		throw new UnsupportedOperationException();
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.LineNumberRulerColumn#doPaint(org.eclipse.swt.graphics.GC)
 	 */
 	void doPaint(GC gc, ILineRange visibleLines) {
 		Color foreground= gc.getForeground();
 		if (visibleLines != null) {
 			if (fRevisionPainter.hasInformation())
 				fRevisionPainter.paint(gc, visibleLines);
 			else if (fDiffPainter.hasInformation()) // don't paint quick diff colors if revisions are painted
 				fDiffPainter.paint(gc, visibleLines);
 		}
 		gc.setForeground(foreground);
 		if (fShowNumbers || fCharacterDisplay)
 			super.doPaint(gc, visibleLines);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#getHover()
 	 */
 	public IAnnotationHover getHover() {
 		int activeLine= getParentRuler().getLineOfLastMouseButtonActivity();
 		if (fRevisionPainter.hasHover(activeLine))
 			return fRevisionPainter.getHover();
 		if (fDiffPainter.hasHover(activeLine))
 			return fDiffPainter.getHover();
 		return null;
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IChangeRulerColumn#setHover(org.eclipse.jface.text.source.IAnnotationHover)
 	 */
 	public void setHover(IAnnotationHover hover) {
 		fRevisionPainter.setHover(hover);
 		fDiffPainter.setHover(hover);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IChangeRulerColumn#setBackground(org.eclipse.swt.graphics.Color)
 	 */
 	public void setBackground(Color background) {
 		super.setBackground(background);
 		fRevisionPainter.setBackground(background);
 		fDiffPainter.setBackground(background);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IChangeRulerColumn#setAddedColor(org.eclipse.swt.graphics.Color)
 	 */
 	public void setAddedColor(Color addedColor) {
 		fDiffPainter.setAddedColor(addedColor);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IChangeRulerColumn#setChangedColor(org.eclipse.swt.graphics.Color)
 	 */
 	public void setChangedColor(Color changedColor) {
 		fDiffPainter.setChangedColor(changedColor);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.IChangeRulerColumn#setDeletedColor(org.eclipse.swt.graphics.Color)
 	 */
 	public void setDeletedColor(Color deletedColor) {
 		fDiffPainter.setDeletedColor(deletedColor);
 	}

 	/*
 	 * @see org.eclipse.jface.text.revisions.IRevisionRulerColumn#setRevisionInformation(org.eclipse.jface.text.revisions.RevisionInformation)
 	 */
 	public void setRevisionInformation(RevisionInformation info) {
 		fRevisionPainter.setRevisionInformation(info);
 		updateNumberOfDigits();
 		computeIndentations();
 		layout(true);
 		postRedraw();
 	}

     /*
      * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#getRevisionSelectionProvider()
      * @since 3.2
      */
     public ISelectionProvider getRevisionSelectionProvider() {
 	    return fRevisionPainter.getRevisionSelectionProvider();
     }

     /*
      * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#setRenderingMode(org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension.RenderingMode)
      * @since 3.3
      */
     public void setRevisionRenderingMode(RenderingMode renderingMode) {
 		fRevisionPainter.setRenderingMode(renderingMode);
 	}

 	/**
 	 * Sets the line number display mode.
 	 *
 	 * @param showNumbers <code>true</code> to show numbers, <code>false</code> to only show
 	 *        diff / revision info.
 	 * @since 3.3
 	 */
     public void showLineNumbers(boolean showNumbers) {
     	if (fShowNumbers != showNumbers) {
     		fShowNumbers= showNumbers;
 			updateNumberOfDigits();
 			computeIndentations();
 			layout(true);
     	}
     }

     /*
      * @see org.eclipse.jface.text.source.LineNumberRulerColumn#getWidth()
      * @since 3.3
      */
     public int getWidth() {
    		int width= super.getWidth();
 		return width > 0 ? width : 8; // minimal width to display quick diff / revisions if no textual info is shown
     }

     /**
 	 * Returns <code>true</code> if the ruler is showing line numbers, <code>false</code>
 	 * otherwise
 	 *
 	 * @return <code>true</code> if line numbers are shown, <code>false</code> otherwise
 	 * @since 3.3
 	 */
 	public boolean isShowingLineNumbers() {
 		return fShowNumbers;
 	}

 	/**
 	 * Returns <code>true</code> if the ruler is showing revision information, <code>false</code>
 	 * otherwise
 	 *
 	 * @return <code>true</code> if revision information is shown, <code>false</code> otherwise
 	 * @since 3.3
 	 */
 	public boolean isShowingRevisionInformation() {
 		return fRevisionPainter.hasInformation();
 	}

 	/**
 	 * Returns <code>true</code> if the ruler is showing change information, <code>false</code>
 	 * otherwise
 	 *
 	 * @return <code>true</code> if change information is shown, <code>false</code> otherwise
 	 * @since 3.3
 	 */
 	public boolean isShowingChangeInformation() {
 		return fDiffPainter.hasInformation();
 	}

 	/*
 	 * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#showRevisionAuthor(boolean)
 	 * @since 3.3
 	 */
 	public void showRevisionAuthor(boolean show) {
 		fRevisionPainter.showRevisionAuthor(show);
 		updateNumberOfDigits();
 		computeIndentations();
 		layout(true);
 		postRedraw();
 	}

 	/*
 	 * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#showRevisionId(boolean)
 	 * @since 3.3
 	 */
 	public void showRevisionId(boolean show) {
 		fRevisionPainter.showRevisionId(show);
 		updateNumberOfDigits();
 		computeIndentations();
 		layout(true);
 		postRedraw();
 	}

 	/*
 	 * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#addRevisionListener(org.eclipse.jface.text.revisions.IRevisionListener)
 	 * @since 3.3
 	 */
 	public void addRevisionListener(IRevisionListener listener) {
 		fRevisionPainter.addRevisionListener(listener);
 	}

 	/*
 	 * @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#removeRevisionListener(org.eclipse.jface.text.revisions.IRevisionListener)
 	 * @since 3.3
 	 */
 	public void removeRevisionListener(IRevisionListener listener) {
 		fRevisionPainter.removeRevisionListener(listener);
 	}

 	/*
 	 * @see org.eclipse.jface.text.source.LineNumberRulerColumn#handleDispose()
 	 * @since 3.3
 	 */
 	protected void handleDispose() {
 		fRevisionPainter.setParentRuler(null);
 		fRevisionPainter.setModel(null);
 		fDiffPainter.setParentRuler(null);
 		fDiffPainter.setModel(null);
 		super.handleDispose();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 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
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jface.text.source;

	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;

	import org.eclipse.core.runtime.Assert;

	import org.eclipse.jface.internal.text.revisions.RevisionPainter;
	import org.eclipse.jface.internal.text.source.DiffPainter;
	import org.eclipse.jface.viewers.ISelectionProvider;

	import org.eclipse.jface.text.revisions.IRevisionListener;
	import org.eclipse.jface.text.revisions.IRevisionRulerColumn;
	import org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension;
	import org.eclipse.jface.text.revisions.RevisionInformation;

	/**
	* A vertical ruler column displaying line numbers and serving as a UI for quick diff.
	* Clients usually instantiate and configure object of this class.
	*
	* @since 3.0
	*/
	public final class LineNumberChangeRulerColumn extends LineNumberRulerColumn implements IVerticalRulerInfo, IVerticalRulerInfoExtension, IChangeRulerColumn, IRevisionRulerColumn, IRevisionRulerColumnExtension {
	/** The ruler's annotation model. */
	private IAnnotationModel fAnnotationModel;
	/** <code>true</code> if changes should be displayed using character indications instead of background colors. */
	private boolean fCharacterDisplay;
	/**
	* The revision painter strategy.
	*
	* @since 3.2
	*/
	private final RevisionPainter fRevisionPainter;
	/**
	* The diff information painter strategy.
	*
	* @since 3.2
	*/
	private final DiffPainter fDiffPainter;
	/**
	* Whether to show number or to behave like a change ruler column.
	* @since 3.3
	*/
	private boolean fShowNumbers= true;

	/**
	* Creates a new instance.
	*
	* @param sharedColors the shared colors provider to use
	*/
	public LineNumberChangeRulerColumn(ISharedTextColors sharedColors) {
	Assert.isNotNull(sharedColors);
	fRevisionPainter= new RevisionPainter(this, sharedColors);
	fDiffPainter= new DiffPainter(this, sharedColors);
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#createControl(org.eclipse.jface.text.source.CompositeRuler, org.eclipse.swt.widgets.Composite)
	*/
	public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
	Control control= super.createControl(parentRuler, parentControl);
	fRevisionPainter.setParentRuler(parentRuler);
	fDiffPainter.setParentRuler(parentRuler);
	return control;
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfo#getLineOfLastMouseButtonActivity()
	*/
	public int getLineOfLastMouseButtonActivity() {
	return getParentRuler().getLineOfLastMouseButtonActivity();
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfo#toDocumentLineNumber(int)
	*/
	public int toDocumentLineNumber(int y_coordinate) {
	return getParentRuler().toDocumentLineNumber(y_coordinate);
	}

	/*
	* @see IVerticalRulerColumn#setModel(IAnnotationModel)
	*/
	public void setModel(IAnnotationModel model) {
	setAnnotationModel(model);
	fRevisionPainter.setModel(model);
	fDiffPainter.setModel(model);
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	postRedraw();
	}

	private void setAnnotationModel(IAnnotationModel model) {
	if (fAnnotationModel != model)
	fAnnotationModel= model;
	}


	/**
	* Sets the display mode of the ruler. If character mode is set to <code>true</code>, diff
	* information will be displayed textually on the line number ruler.
	*
	* @param characterMode <code>true</code> if diff information is to be displayed textually.
	*/
	public void setDisplayMode(boolean characterMode) {
	if (characterMode != fCharacterDisplay) {
	fCharacterDisplay= characterMode;
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	}
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#getModel()
	*/
	public IAnnotationModel getModel() {
	return fAnnotationModel;
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#createDisplayString(int)
	*/
	protected String createDisplayString(int line) {
	StringBuffer buffer= new StringBuffer();
	if (fShowNumbers)
	buffer.append(super.createDisplayString(line));
	if (fCharacterDisplay && getModel() != null)
	buffer.append(fDiffPainter.getDisplayCharacter(line));
	return buffer.toString();
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#computeNumberOfDigits()
	*/
	protected int computeNumberOfDigits() {
	int digits;
	if (fCharacterDisplay && getModel() != null) {
	if (fShowNumbers)
	digits= super.computeNumberOfDigits() + 1;
	else
	digits= 1;
	} else {
	if (fShowNumbers)
	digits= super.computeNumberOfDigits();
	else
	digits= 0;
	}
	if (fRevisionPainter.hasInformation())
	digits+= fRevisionPainter.getRequiredWidth();
	return digits;
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#addVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
	*/
	public void addVerticalRulerListener(IVerticalRulerListener listener) {
	throw new UnsupportedOperationException();
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#removeVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
	*/
	public void removeVerticalRulerListener(IVerticalRulerListener listener) {
	throw new UnsupportedOperationException();
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#doPaint(org.eclipse.swt.graphics.GC)
	*/
	void doPaint(GC gc, ILineRange visibleLines) {
	Color foreground= gc.getForeground();
	if (visibleLines != null) {
	if (fRevisionPainter.hasInformation())
	fRevisionPainter.paint(gc, visibleLines);
	else if (fDiffPainter.hasInformation()) // don't paint quick diff colors if revisions are painted
	fDiffPainter.paint(gc, visibleLines);
	}
	gc.setForeground(foreground);
	if (fShowNumbers \|\| fCharacterDisplay)
	super.doPaint(gc, visibleLines);
	}

	/*
	* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#getHover()
	*/
	public IAnnotationHover getHover() {
	int activeLine= getParentRuler().getLineOfLastMouseButtonActivity();
	if (fRevisionPainter.hasHover(activeLine))
	return fRevisionPainter.getHover();
	if (fDiffPainter.hasHover(activeLine))
	return fDiffPainter.getHover();
	return null;
	}

	/*
	* @see org.eclipse.jface.text.source.IChangeRulerColumn#setHover(org.eclipse.jface.text.source.IAnnotationHover)
	*/
	public void setHover(IAnnotationHover hover) {
	fRevisionPainter.setHover(hover);
	fDiffPainter.setHover(hover);
	}

	/*
	* @see org.eclipse.jface.text.source.IChangeRulerColumn#setBackground(org.eclipse.swt.graphics.Color)
	*/
	public void setBackground(Color background) {
	super.setBackground(background);
	fRevisionPainter.setBackground(background);
	fDiffPainter.setBackground(background);
	}

	/*
	* @see org.eclipse.jface.text.source.IChangeRulerColumn#setAddedColor(org.eclipse.swt.graphics.Color)
	*/
	public void setAddedColor(Color addedColor) {
	fDiffPainter.setAddedColor(addedColor);
	}

	/*
	* @see org.eclipse.jface.text.source.IChangeRulerColumn#setChangedColor(org.eclipse.swt.graphics.Color)
	*/
	public void setChangedColor(Color changedColor) {
	fDiffPainter.setChangedColor(changedColor);
	}

	/*
	* @see org.eclipse.jface.text.source.IChangeRulerColumn#setDeletedColor(org.eclipse.swt.graphics.Color)
	*/
	public void setDeletedColor(Color deletedColor) {
	fDiffPainter.setDeletedColor(deletedColor);
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumn#setRevisionInformation(org.eclipse.jface.text.revisions.RevisionInformation)
	*/
	public void setRevisionInformation(RevisionInformation info) {
	fRevisionPainter.setRevisionInformation(info);
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	postRedraw();
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#getRevisionSelectionProvider()
	* @since 3.2
	*/
	public ISelectionProvider getRevisionSelectionProvider() {
	return fRevisionPainter.getRevisionSelectionProvider();
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#setRenderingMode(org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension.RenderingMode)
	* @since 3.3
	*/
	public void setRevisionRenderingMode(RenderingMode renderingMode) {
	fRevisionPainter.setRenderingMode(renderingMode);
	}

	/**
	* Sets the line number display mode.
	*
	* @param showNumbers <code>true</code> to show numbers, <code>false</code> to only show
	* diff / revision info.
	* @since 3.3
	*/
	public void showLineNumbers(boolean showNumbers) {
	if (fShowNumbers != showNumbers) {
	fShowNumbers= showNumbers;
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	}
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#getWidth()
	* @since 3.3
	*/
	public int getWidth() {
	int width= super.getWidth();
	return width > 0 ? width : 8; // minimal width to display quick diff / revisions if no textual info is shown
	}

	/**
	* Returns <code>true</code> if the ruler is showing line numbers, <code>false</code>
	* otherwise
	*
	* @return <code>true</code> if line numbers are shown, <code>false</code> otherwise
	* @since 3.3
	*/
	public boolean isShowingLineNumbers() {
	return fShowNumbers;
	}

	/**
	* Returns <code>true</code> if the ruler is showing revision information, <code>false</code>
	* otherwise
	*
	* @return <code>true</code> if revision information is shown, <code>false</code> otherwise
	* @since 3.3
	*/
	public boolean isShowingRevisionInformation() {
	return fRevisionPainter.hasInformation();
	}

	/**
	* Returns <code>true</code> if the ruler is showing change information, <code>false</code>
	* otherwise
	*
	* @return <code>true</code> if change information is shown, <code>false</code> otherwise
	* @since 3.3
	*/
	public boolean isShowingChangeInformation() {
	return fDiffPainter.hasInformation();
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#showRevisionAuthor(boolean)
	* @since 3.3
	*/
	public void showRevisionAuthor(boolean show) {
	fRevisionPainter.showRevisionAuthor(show);
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	postRedraw();
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#showRevisionId(boolean)
	* @since 3.3
	*/
	public void showRevisionId(boolean show) {
	fRevisionPainter.showRevisionId(show);
	updateNumberOfDigits();
	computeIndentations();
	layout(true);
	postRedraw();
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#addRevisionListener(org.eclipse.jface.text.revisions.IRevisionListener)
	* @since 3.3
	*/
	public void addRevisionListener(IRevisionListener listener) {
	fRevisionPainter.addRevisionListener(listener);
	}

	/*
	* @see org.eclipse.jface.text.revisions.IRevisionRulerColumnExtension#removeRevisionListener(org.eclipse.jface.text.revisions.IRevisionListener)
	* @since 3.3
	*/
	public void removeRevisionListener(IRevisionListener listener) {
	fRevisionPainter.removeRevisionListener(listener);
	}

	/*
	* @see org.eclipse.jface.text.source.LineNumberRulerColumn#handleDispose()
	* @since 3.3
	*/
	protected void handleDispose() {
	fRevisionPainter.setParentRuler(null);
	fRevisionPainter.setModel(null);
	fDiffPainter.setParentRuler(null);
	fDiffPainter.setModel(null);
	super.handleDispose();
	}
	}