r/org.eclipse.statet.r.ui/srcDebug/org/eclipse/statet/internal/r/debug/ui/assist/RElementInfoControl.java - statet/org.eclipse.statet-r - Git at Google

 /*=============================================================================#
  # Copyright (c) 2009, 2020 Stephan Wahlbrink and others.
  #
  # This program and the accompanying materials are made available under the
  # terms of the Eclipse Public License 2.0 which is available at
  # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
  # which is available at https://www.apache.org/licenses/LICENSE-2.0.
  #
  # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  #
  # Contributors:
  #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
  #=============================================================================*/

 package org.eclipse.statet.internal.r.debug.ui.assist;

 import static org.eclipse.debug.ui.IDebugUIConstants.PREF_DETAIL_PANE_FONT;

 import static org.eclipse.statet.ltk.ui.sourceediting.assist.InfoHover.MODE_FOCUS;

 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.action.ToolBarManager;
 import org.eclipse.jface.resource.JFaceResources;
 import org.eclipse.jface.text.AbstractInformationControl;
 import org.eclipse.jface.text.IInformationControlCreator;
 import org.eclipse.jface.text.IInformationControlExtension2;
 import org.eclipse.jface.util.IPropertyChangeListener;
 import org.eclipse.jface.util.PropertyChangeEvent;
 import org.eclipse.jface.viewers.StyledString;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.StyleRange;
 import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.FontMetrics;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.services.IServiceLocator;

 import org.eclipse.statet.ecommons.ui.SharedUIResources;
 import org.eclipse.statet.ecommons.ui.actions.HandlerCollection;
 import org.eclipse.statet.ecommons.ui.actions.SimpleContributionItem;
 import org.eclipse.statet.ecommons.ui.util.InformationDispatchHandler;
 import org.eclipse.statet.ecommons.ui.util.LayoutUtils;

 import org.eclipse.statet.nico.core.runtime.ToolProcess;
 import org.eclipse.statet.r.core.data.CombinedRElement;
 import org.eclipse.statet.r.core.model.RElementName;
 import org.eclipse.statet.r.ui.RLabelProvider;
 import org.eclipse.statet.r.ui.dataeditor.RDataEditor;
 import org.eclipse.statet.r.ui.dataeditor.RLiveDataEditorInput;
 import org.eclipse.statet.r.ui.rtool.RElementInfoHoverCreator;
 import org.eclipse.statet.r.ui.rtool.RElementInfoTask.RElementInfoData;
 import org.eclipse.statet.rj.ts.core.RTool;


 public class RElementInfoControl extends AbstractInformationControl implements IInformationControlExtension2,
 		IPropertyChangeListener {


 	private class OpenInEditorItem extends SimpleContributionItem {


 		public OpenInEditorItem() {
 			super(Messages.RElementInfo_OpenDataViewer_label, null,
 					PlatformUI.getWorkbench().getEditorRegistry().findEditor(RDataEditor.RDATA_EDITOR_ID)
 							.getImageDescriptor(), null );
 		}


 		@Override
 		public boolean isEnabled() {
 			final RElementInfoData input= getInput();
 			if (input != null) {
 				final CombinedRElement rElement= input.getElement();
 				return (rElement != null
 					&& RLiveDataEditorInput.isSupported(rElement)
 					&& input.getTool() instanceof ToolProcess );
 			}
 			return false;
 		}

 		@Override
 		protected void execute() throws ExecutionException {
 			final RElementInfoData input= getInput();
 			if (input != null) {
 				final RTool tool= input.getTool();
 				final RElementName elementName= input.getElementName();

 				RDataEditor.open(input.getWorkbenchPart().getSite().getPage(),
 						tool, elementName, null );
 				return;
 			}
 		}

 	}


 	private final int mode;

 	private RLabelProvider labelProvider;

 	private Composite contentComposite;
 	private Label titleImage;
 	private StyledText titleText;
 	private StyledText infoText;

 	private boolean layoutWorkaround;
 	private boolean layoutHint;

 	private RElementInfoData input;
 	private boolean inputChanged;


 	public RElementInfoControl(final Shell shell, final int mode) {
 		super(shell, ""); //$NON-NLS-1$
 		assert ((mode & MODE_FOCUS) == 0);
 		this.mode= mode;

 		JFaceResources.getFontRegistry().addListener(this);
 		create();
 	}

 	public RElementInfoControl(final Shell shell, final int mode, final boolean dummy) {
 		super(shell, new ToolBarManager(SWT.FLAT));
 		assert ((mode & MODE_FOCUS) != 0);
 		this.mode= mode;

 		create();
 	}


 	@Override
 	public void setInput(final Object input) {
 		this.inputChanged= true;
 		if (input instanceof RElementInfoData) {
 			this.input= (RElementInfoData) input;
 		}
 		else {
 			this.input= null;
 		}
 	}

 	public RElementInfoData getInput() {
 		return this.input;
 	}

 	@Override
 	public boolean hasContents() {
 		return (this.input != null);
 	}

 	@Override
 	protected void createContent(final Composite parent) {
 		this.contentComposite= new Composite(parent, SWT.NONE) {
 			@Override
 			public Point computeSize(final int width, final int height, final boolean changed) {
 				return super.computeSize(width, height, changed || width != getSize().x);
 			}
 		};
 		this.contentComposite.setBackgroundMode(SWT.INHERIT_FORCE);

 		final GridLayout gridLayout= LayoutUtils.newCompositeGrid(2);
 		gridLayout.horizontalSpacing= (int) ((gridLayout.horizontalSpacing) / 1.5);
 		this.contentComposite.setLayout(gridLayout);

 		final int vIndent= Math.max(1, LayoutUtils.defaultVSpacing() / 4);
 		final int hIndent= Math.max(3, LayoutUtils.defaultHSpacing() / 2);

 		{	// Title image
 			this.titleImage= new Label(this.contentComposite, SWT.NULL);
 			final Image image= SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID);
 			this.titleImage.setImage(image);

 			final GridData textGd= new GridData(SWT.FILL, SWT.TOP, false, false);
 			this.titleText= new StyledText(this.contentComposite, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP) {
 				@Override
 				public Point computeSize(int width, final int height, final boolean changed) {
 					if (!RElementInfoControl.this.layoutHint && width <= 0 && RElementInfoControl.this.contentComposite.getSize().x > 0) {
 						width= RElementInfoControl.this.contentComposite.getSize().x -
 								LayoutUtils.defaultHMargin() - RElementInfoControl.this.titleImage.getSize().x - LayoutUtils.defaultHSpacing() - 10;
 					}

 					final Point size= super.computeSize(width, -1, true);
 //					if (width >= 0) {
 //						size.x= Math.min(size.x, width);
 //					}
 					return size;
 				}
 			};

 			this.titleText.setFont(JFaceResources.getDialogFont());
 			final GC gc= new GC(this.titleText);
 			final FontMetrics fontMetrics= gc.getFontMetrics();
 			final GridData imageGd= new GridData(SWT.FILL, SWT.TOP, false, false);
 			imageGd.horizontalIndent= hIndent;
 			final int textHeight= fontMetrics.getAscent() + fontMetrics.getLeading();
 			final int imageHeight= image.getBounds().height;
 			final int shift= Math.max(3, (int) ((fontMetrics.getDescent()) / 1.5));
 			if (textHeight+shift < imageHeight) {
 				imageGd.verticalIndent= vIndent+shift;
 				textGd.verticalIndent= vIndent+(imageHeight-textHeight);
 			}
 			else {
 				imageGd.verticalIndent= vIndent+(textHeight-imageHeight)+shift;
 				textGd.verticalIndent= vIndent;
 			}
 			this.titleImage.setLayoutData(imageGd);
 			this.titleText.setLayoutData(textGd);
 			this.layoutWorkaround= true;

 			gc.dispose();
 		}

 		this.infoText= new StyledText(this.contentComposite, ((this.mode & MODE_FOCUS) != 0) ?
 				(SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL) :
 				(SWT.MULTI | SWT.READ_ONLY) );
 		this.infoText.setIndent(hIndent);
 		this.infoText.setFont(JFaceResources.getFont(PREF_DETAIL_PANE_FONT));

 		final GridData gd= new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
 //		gd.widthHint= LayoutUtils.hintWidth(fInfoText, INFO_FONT, 50);
 		this.infoText.setLayoutData(gd);

 		setBackgroundColor(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));
 		setForegroundColor(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_FOREGROUND));

 		if ((this.mode & MODE_FOCUS) != 0) {
 			final ToolBarManager toolBarManager= getToolBarManager();
 			contributeToActionBars(PlatformUI.getWorkbench(), toolBarManager, null);
 		}

 		updateInput();
 	}

 	protected void contributeToActionBars(final IServiceLocator serviceLocator,
 			final ToolBarManager toolBarManager, final HandlerCollection handlers) {
 		toolBarManager.add(new OpenInEditorItem());
 	}


 	@Override
 	public void setBackgroundColor(final Color background) {
 		super.setBackgroundColor(background);
 		this.contentComposite.setBackground(background);
 	}

 	@Override
 	public void setForegroundColor(final Color foreground) {
 		super.setForegroundColor(foreground);
 		this.contentComposite.setForeground(foreground);
 		this.titleText.setForeground(foreground);
 		this.infoText.setForeground(foreground);
 	}


 	@Override
 	public Rectangle computeTrim() {
 		final Rectangle trim= super.computeTrim();

 		final Rectangle textTrim= this.infoText.computeTrim(0, 0, 0, 0);
 		trim.x += textTrim.x;
 		trim.y += textTrim.y;
 		trim.width += textTrim.width;
 		trim.height += textTrim.height;

 		return trim;
 	}

 	@Override
 	public Point computeSizeHint() {
 		updateInput();
 		final Point sizeConstraints= getSizeConstraints();
 		final Rectangle trim= computeTrim();

 //		int charWidth= 20;
 //		if (fInput.detailInfo != null) {
 //			final int count= Math.min(6, fInfoText.getLineCount());
 //			for (int i= 0; i < count; i++) {
 //				charWidth= Math.max(charWidth, fInfoText.getLine(i).length());
 //			}
 //		}
 		int widthHint= this.infoText.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x + LayoutUtils.defaultHSpacing();
 		final int widthMax2= LayoutUtils.hintWidth(this.infoText, PREF_DETAIL_PANE_FONT, 80);
 		final int widthMax= ((sizeConstraints != null && sizeConstraints.x != SWT.DEFAULT) ?
 				sizeConstraints.x : widthMax2) - trim.width;
 		this.layoutHint= true;
 		final int titleHint= LayoutUtils.defaultHMargin() + this.titleImage.getSize().x + LayoutUtils.defaultHSpacing() + this.titleText.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
 		this.layoutHint= false;
 		if (titleHint > widthHint && widthMax2 > widthHint) {
 			widthHint= Math.min(widthMax2, titleHint);
 		}
 		if (widthMax < widthHint) {
 			widthHint= widthMax;
 		}
 		// avoid change of wrapping caused by scrollbar
 		if (widthHint < titleHint && widthHint + this.infoText.computeTrim(0, 0, 0, 0).width >= titleHint) {
 			widthHint= titleHint;
 		}

 		final int heightMax= ((sizeConstraints != null && sizeConstraints.y != SWT.DEFAULT) ?
 				sizeConstraints.y :
 				this.infoText.getLineHeight()*12) - trim.height;

 		final Point size= this.contentComposite.computeSize(widthHint, SWT.DEFAULT, true);
 		size.y += LayoutUtils.defaultVSpacing();
 		size.x= Math.max(Math.min(size.x, widthMax), 200) + trim.width;
 		size.y= Math.max(Math.min(size.y, heightMax), 100) + trim.height;
 		return size;
 	}

 	@Override
 	public Point computeSizeConstraints(final int widthInChars, final int heightInChars) {
 		final int titleWidth= LayoutUtils.hintWidth(this.titleText, JFaceResources.DIALOG_FONT, widthInChars);
 		final int titleHeight= this.titleText.getLineHeight();
 		final int infoWidth= LayoutUtils.hintWidth(this.infoText, PREF_DETAIL_PANE_FONT, widthInChars);
 		final int infoHeight= this.infoText.getLineHeight() * (heightInChars);

 		return new Point(Math.max(titleWidth, infoWidth),
 				titleHeight + LayoutUtils.defaultVSpacing() + infoHeight );
 	}

 	@Override
 	public void setVisible(final boolean visible) {
 		if (visible) {
 			updateInput();

 			if (this.layoutWorkaround) {
 				this.contentComposite.layout(true, true);
 				this.layoutWorkaround= false;
 			}

 			if (Platform.WS_WIN32.equals(SWT.getPlatform())) {
 				final Shell shell= getShell();
 				if (shell != null) {
 					shell.moveAbove(null);
 				}
 			}
 		}
 		super.setVisible(visible);
 	}

 	@Override
 	public void setFocus() {
 		this.infoText.setFocus();
 	}

 	private void updateInput() {
 		if (this.infoText == null || !this.inputChanged) {
 			return;
 		}
 		if (this.labelProvider == null) {
 			this.labelProvider= new RLabelProvider(RLabelProvider.LONG | RLabelProvider.HEADER | RLabelProvider.NAMESPACE);
 		}
 		if (this.input != null) {
 			final Image image= this.labelProvider.getImage(this.input.getElement());
 			this.titleImage.setImage((image != null) ? image : SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID));
 			final StyledString styleString= this.labelProvider.getStyledText(this.input.getElement(), this.input.getElementName(), this.input.getElementAttr());
 			if (this.input.isElementOfActiveBinding()) {
 				styleString.append(" (active binding)", StyledString.QUALIFIER_STYLER);
 			}
 			this.titleText.setText(styleString.getString());
 			this.titleText.setStyleRanges(styleString.getStyleRanges());
 			if (this.input.hasDetail()) {
 				this.infoText.setText(this.input.getDetailTitle() + '\n' + ((this.input.getDetailInfo() != null) ? this.input.getDetailInfo() : "")); //$NON-NLS-1$
 				final StyleRange title= new StyleRange(0, this.input.getDetailTitle().length(), null, null);
 				title.underline= true;
 				this.infoText.setStyleRange(title);
 			}
 			else {
 				this.infoText.setText(""); //$NON-NLS-1$
 			}
 		}
 		else {
 			this.titleImage.setImage(SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID));
 			this.titleText.setText(""); //$NON-NLS-1$
 			this.infoText.setText(""); //$NON-NLS-1$
 		}
 		if ((this.mode & MODE_FOCUS) != 0) {
 			getToolBarManager().update(true);
 		}
 		else {
 			setStatusText((this.input.getControl() != null
 							&& this.input.getControl().isFocusControl() ) ?
 					InformationDispatchHandler.getTooltipAffordanceString() : "" ); //$NON-NLS-1$
 		}
 		this.inputChanged= false;
 	}


 	@Override
 	public IInformationControlCreator getInformationPresenterControlCreator() {
 		// enriched mode
 		return new RElementInfoHoverCreator(this.mode | MODE_FOCUS);
 	}

 	@Override
 	public void propertyChange(final PropertyChangeEvent event) {
 		final String property= event.getProperty();
 		if (property.equals(PREF_DETAIL_PANE_FONT) || property.equals(JFaceResources.DEFAULT_FONT)) {
 			dispose();
 		}
 	}

 	@Override
 	public void dispose() {
 		JFaceResources.getFontRegistry().removeListener(this);
 		super.dispose();
 	}

 }
	/*=============================================================================#
	# Copyright (c) 2009, 2020 Stephan Wahlbrink and others.
	#
	# This program and the accompanying materials are made available under the
	# terms of the Eclipse Public License 2.0 which is available at
	# https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
	# which is available at https://www.apache.org/licenses/LICENSE-2.0.
	#
	# SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
	#
	# Contributors:
	# Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
	#=============================================================================*/

	package org.eclipse.statet.internal.r.debug.ui.assist;

	import static org.eclipse.debug.ui.IDebugUIConstants.PREF_DETAIL_PANE_FONT;

	import static org.eclipse.statet.ltk.ui.sourceediting.assist.InfoHover.MODE_FOCUS;

	import org.eclipse.core.commands.ExecutionException;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.jface.action.ToolBarManager;
	import org.eclipse.jface.resource.JFaceResources;
	import org.eclipse.jface.text.AbstractInformationControl;
	import org.eclipse.jface.text.IInformationControlCreator;
	import org.eclipse.jface.text.IInformationControlExtension2;
	import org.eclipse.jface.util.IPropertyChangeListener;
	import org.eclipse.jface.util.PropertyChangeEvent;
	import org.eclipse.jface.viewers.StyledString;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.StyleRange;
	import org.eclipse.swt.custom.StyledText;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.FontMetrics;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.services.IServiceLocator;

	import org.eclipse.statet.ecommons.ui.SharedUIResources;
	import org.eclipse.statet.ecommons.ui.actions.HandlerCollection;
	import org.eclipse.statet.ecommons.ui.actions.SimpleContributionItem;
	import org.eclipse.statet.ecommons.ui.util.InformationDispatchHandler;
	import org.eclipse.statet.ecommons.ui.util.LayoutUtils;

	import org.eclipse.statet.nico.core.runtime.ToolProcess;
	import org.eclipse.statet.r.core.data.CombinedRElement;
	import org.eclipse.statet.r.core.model.RElementName;
	import org.eclipse.statet.r.ui.RLabelProvider;
	import org.eclipse.statet.r.ui.dataeditor.RDataEditor;
	import org.eclipse.statet.r.ui.dataeditor.RLiveDataEditorInput;
	import org.eclipse.statet.r.ui.rtool.RElementInfoHoverCreator;
	import org.eclipse.statet.r.ui.rtool.RElementInfoTask.RElementInfoData;
	import org.eclipse.statet.rj.ts.core.RTool;


	public class RElementInfoControl extends AbstractInformationControl implements IInformationControlExtension2,
	IPropertyChangeListener {


	private class OpenInEditorItem extends SimpleContributionItem {


	public OpenInEditorItem() {
	super(Messages.RElementInfo_OpenDataViewer_label, null,
	PlatformUI.getWorkbench().getEditorRegistry().findEditor(RDataEditor.RDATA_EDITOR_ID)
	.getImageDescriptor(), null );
	}


	@Override
	public boolean isEnabled() {
	final RElementInfoData input= getInput();
	if (input != null) {
	final CombinedRElement rElement= input.getElement();
	return (rElement != null
	&& RLiveDataEditorInput.isSupported(rElement)
	&& input.getTool() instanceof ToolProcess );
	}
	return false;
	}

	@Override
	protected void execute() throws ExecutionException {
	final RElementInfoData input= getInput();
	if (input != null) {
	final RTool tool= input.getTool();
	final RElementName elementName= input.getElementName();

	RDataEditor.open(input.getWorkbenchPart().getSite().getPage(),
	tool, elementName, null );
	return;
	}
	}

	}


	private final int mode;

	private RLabelProvider labelProvider;

	private Composite contentComposite;
	private Label titleImage;
	private StyledText titleText;
	private StyledText infoText;

	private boolean layoutWorkaround;
	private boolean layoutHint;

	private RElementInfoData input;
	private boolean inputChanged;


	public RElementInfoControl(final Shell shell, final int mode) {
	super(shell, ""); //$NON-NLS-1$
	assert ((mode & MODE_FOCUS) == 0);
	this.mode= mode;

	JFaceResources.getFontRegistry().addListener(this);
	create();
	}

	public RElementInfoControl(final Shell shell, final int mode, final boolean dummy) {
	super(shell, new ToolBarManager(SWT.FLAT));
	assert ((mode & MODE_FOCUS) != 0);
	this.mode= mode;

	create();
	}


	@Override
	public void setInput(final Object input) {
	this.inputChanged= true;
	if (input instanceof RElementInfoData) {
	this.input= (RElementInfoData) input;
	}
	else {
	this.input= null;
	}
	}

	public RElementInfoData getInput() {
	return this.input;
	}

	@Override
	public boolean hasContents() {
	return (this.input != null);
	}

	@Override
	protected void createContent(final Composite parent) {
	this.contentComposite= new Composite(parent, SWT.NONE) {
	@Override
	public Point computeSize(final int width, final int height, final boolean changed) {
	return super.computeSize(width, height, changed \|\| width != getSize().x);
	}
	};
	this.contentComposite.setBackgroundMode(SWT.INHERIT_FORCE);

	final GridLayout gridLayout= LayoutUtils.newCompositeGrid(2);
	gridLayout.horizontalSpacing= (int) ((gridLayout.horizontalSpacing) / 1.5);
	this.contentComposite.setLayout(gridLayout);

	final int vIndent= Math.max(1, LayoutUtils.defaultVSpacing() / 4);
	final int hIndent= Math.max(3, LayoutUtils.defaultHSpacing() / 2);

	{ // Title image
	this.titleImage= new Label(this.contentComposite, SWT.NULL);
	final Image image= SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID);
	this.titleImage.setImage(image);

	final GridData textGd= new GridData(SWT.FILL, SWT.TOP, false, false);
	this.titleText= new StyledText(this.contentComposite, SWT.MULTI \| SWT.READ_ONLY \| SWT.WRAP) {
	@Override
	public Point computeSize(int width, final int height, final boolean changed) {
	if (!RElementInfoControl.this.layoutHint && width <= 0 && RElementInfoControl.this.contentComposite.getSize().x > 0) {
	width= RElementInfoControl.this.contentComposite.getSize().x -
	LayoutUtils.defaultHMargin() - RElementInfoControl.this.titleImage.getSize().x - LayoutUtils.defaultHSpacing() - 10;
	}

	final Point size= super.computeSize(width, -1, true);
	// if (width >= 0) {
	// size.x= Math.min(size.x, width);
	// }
	return size;
	}
	};

	this.titleText.setFont(JFaceResources.getDialogFont());
	final GC gc= new GC(this.titleText);
	final FontMetrics fontMetrics= gc.getFontMetrics();
	final GridData imageGd= new GridData(SWT.FILL, SWT.TOP, false, false);
	imageGd.horizontalIndent= hIndent;
	final int textHeight= fontMetrics.getAscent() + fontMetrics.getLeading();
	final int imageHeight= image.getBounds().height;
	final int shift= Math.max(3, (int) ((fontMetrics.getDescent()) / 1.5));
	if (textHeight+shift < imageHeight) {
	imageGd.verticalIndent= vIndent+shift;
	textGd.verticalIndent= vIndent+(imageHeight-textHeight);
	}
	else {
	imageGd.verticalIndent= vIndent+(textHeight-imageHeight)+shift;
	textGd.verticalIndent= vIndent;
	}
	this.titleImage.setLayoutData(imageGd);
	this.titleText.setLayoutData(textGd);
	this.layoutWorkaround= true;

	gc.dispose();
	}

	this.infoText= new StyledText(this.contentComposite, ((this.mode & MODE_FOCUS) != 0) ?
	(SWT.MULTI \| SWT.READ_ONLY \| SWT.V_SCROLL \| SWT.H_SCROLL) :
	(SWT.MULTI \| SWT.READ_ONLY) );
	this.infoText.setIndent(hIndent);
	this.infoText.setFont(JFaceResources.getFont(PREF_DETAIL_PANE_FONT));

	final GridData gd= new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
	// gd.widthHint= LayoutUtils.hintWidth(fInfoText, INFO_FONT, 50);
	this.infoText.setLayoutData(gd);

	setBackgroundColor(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));
	setForegroundColor(getShell().getDisplay().getSystemColor(SWT.COLOR_INFO_FOREGROUND));

	if ((this.mode & MODE_FOCUS) != 0) {
	final ToolBarManager toolBarManager= getToolBarManager();
	contributeToActionBars(PlatformUI.getWorkbench(), toolBarManager, null);
	}

	updateInput();
	}

	protected void contributeToActionBars(final IServiceLocator serviceLocator,
	final ToolBarManager toolBarManager, final HandlerCollection handlers) {
	toolBarManager.add(new OpenInEditorItem());
	}


	@Override
	public void setBackgroundColor(final Color background) {
	super.setBackgroundColor(background);
	this.contentComposite.setBackground(background);
	}

	@Override
	public void setForegroundColor(final Color foreground) {
	super.setForegroundColor(foreground);
	this.contentComposite.setForeground(foreground);
	this.titleText.setForeground(foreground);
	this.infoText.setForeground(foreground);
	}


	@Override
	public Rectangle computeTrim() {
	final Rectangle trim= super.computeTrim();

	final Rectangle textTrim= this.infoText.computeTrim(0, 0, 0, 0);
	trim.x += textTrim.x;
	trim.y += textTrim.y;
	trim.width += textTrim.width;
	trim.height += textTrim.height;

	return trim;
	}

	@Override
	public Point computeSizeHint() {
	updateInput();
	final Point sizeConstraints= getSizeConstraints();
	final Rectangle trim= computeTrim();

	// int charWidth= 20;
	// if (fInput.detailInfo != null) {
	// final int count= Math.min(6, fInfoText.getLineCount());
	// for (int i= 0; i < count; i++) {
	// charWidth= Math.max(charWidth, fInfoText.getLine(i).length());
	// }
	// }
	int widthHint= this.infoText.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x + LayoutUtils.defaultHSpacing();
	final int widthMax2= LayoutUtils.hintWidth(this.infoText, PREF_DETAIL_PANE_FONT, 80);
	final int widthMax= ((sizeConstraints != null && sizeConstraints.x != SWT.DEFAULT) ?
	sizeConstraints.x : widthMax2) - trim.width;
	this.layoutHint= true;
	final int titleHint= LayoutUtils.defaultHMargin() + this.titleImage.getSize().x + LayoutUtils.defaultHSpacing() + this.titleText.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
	this.layoutHint= false;
	if (titleHint > widthHint && widthMax2 > widthHint) {
	widthHint= Math.min(widthMax2, titleHint);
	}
	if (widthMax < widthHint) {
	widthHint= widthMax;
	}
	// avoid change of wrapping caused by scrollbar
	if (widthHint < titleHint && widthHint + this.infoText.computeTrim(0, 0, 0, 0).width >= titleHint) {
	widthHint= titleHint;
	}

	final int heightMax= ((sizeConstraints != null && sizeConstraints.y != SWT.DEFAULT) ?
	sizeConstraints.y :
	this.infoText.getLineHeight()*12) - trim.height;

	final Point size= this.contentComposite.computeSize(widthHint, SWT.DEFAULT, true);
	size.y += LayoutUtils.defaultVSpacing();
	size.x= Math.max(Math.min(size.x, widthMax), 200) + trim.width;
	size.y= Math.max(Math.min(size.y, heightMax), 100) + trim.height;
	return size;
	}

	@Override
	public Point computeSizeConstraints(final int widthInChars, final int heightInChars) {
	final int titleWidth= LayoutUtils.hintWidth(this.titleText, JFaceResources.DIALOG_FONT, widthInChars);
	final int titleHeight= this.titleText.getLineHeight();
	final int infoWidth= LayoutUtils.hintWidth(this.infoText, PREF_DETAIL_PANE_FONT, widthInChars);
	final int infoHeight= this.infoText.getLineHeight() * (heightInChars);

	return new Point(Math.max(titleWidth, infoWidth),
	titleHeight + LayoutUtils.defaultVSpacing() + infoHeight );
	}

	@Override
	public void setVisible(final boolean visible) {
	if (visible) {
	updateInput();

	if (this.layoutWorkaround) {
	this.contentComposite.layout(true, true);
	this.layoutWorkaround= false;
	}

	if (Platform.WS_WIN32.equals(SWT.getPlatform())) {
	final Shell shell= getShell();
	if (shell != null) {
	shell.moveAbove(null);
	}
	}
	}
	super.setVisible(visible);
	}

	@Override
	public void setFocus() {
	this.infoText.setFocus();
	}

	private void updateInput() {
	if (this.infoText == null \|\| !this.inputChanged) {
	return;
	}
	if (this.labelProvider == null) {
	this.labelProvider= new RLabelProvider(RLabelProvider.LONG \| RLabelProvider.HEADER \| RLabelProvider.NAMESPACE);
	}
	if (this.input != null) {
	final Image image= this.labelProvider.getImage(this.input.getElement());
	this.titleImage.setImage((image != null) ? image : SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID));
	final StyledString styleString= this.labelProvider.getStyledText(this.input.getElement(), this.input.getElementName(), this.input.getElementAttr());
	if (this.input.isElementOfActiveBinding()) {
	styleString.append(" (active binding)", StyledString.QUALIFIER_STYLER);
	}
	this.titleText.setText(styleString.getString());
	this.titleText.setStyleRanges(styleString.getStyleRanges());
	if (this.input.hasDetail()) {
	this.infoText.setText(this.input.getDetailTitle() + '\n' + ((this.input.getDetailInfo() != null) ? this.input.getDetailInfo() : "")); //$NON-NLS-1$
	final StyleRange title= new StyleRange(0, this.input.getDetailTitle().length(), null, null);
	title.underline= true;
	this.infoText.setStyleRange(title);
	}
	else {
	this.infoText.setText(""); //$NON-NLS-1$
	}
	}
	else {
	this.titleImage.setImage(SharedUIResources.getImages().get(SharedUIResources.PLACEHOLDER_IMAGE_ID));
	this.titleText.setText(""); //$NON-NLS-1$
	this.infoText.setText(""); //$NON-NLS-1$
	}
	if ((this.mode & MODE_FOCUS) != 0) {
	getToolBarManager().update(true);
	}
	else {
	setStatusText((this.input.getControl() != null
	&& this.input.getControl().isFocusControl() ) ?
	InformationDispatchHandler.getTooltipAffordanceString() : "" ); //$NON-NLS-1$
	}
	this.inputChanged= false;
	}


	@Override
	public IInformationControlCreator getInformationPresenterControlCreator() {
	// enriched mode
	return new RElementInfoHoverCreator(this.mode \| MODE_FOCUS);
	}

	@Override
	public void propertyChange(final PropertyChangeEvent event) {
	final String property= event.getProperty();
	if (property.equals(PREF_DETAIL_PANE_FONT) \|\| property.equals(JFaceResources.DEFAULT_FONT)) {
	dispose();
	}
	}

	@Override
	public void dispose() {
	JFaceResources.getFontRegistry().removeListener(this);
	super.dispose();
	}

	}