plugins/org.eclipse.mat.ui/src/org/eclipse/mat/ui/snapshot/panes/OverviewPane.java - mat/org.eclipse.mat - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008, 2020 SAP AG, 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:
  *    SAP AG - initial API and implementation
  *    Andrew Johnson (IBM Corporation) - comparisons
  *******************************************************************************/
 package org.eclipse.mat.ui.snapshot.panes;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.regex.Pattern;

 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ISelectionProvider;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.mat.SnapshotException;
 import org.eclipse.mat.internal.snapshot.SnapshotQueryContext;
 import org.eclipse.mat.query.IResult;
 import org.eclipse.mat.query.annotations.Category;
 import org.eclipse.mat.query.registry.CommandLine;
 import org.eclipse.mat.query.registry.QueryDescriptor;
 import org.eclipse.mat.query.registry.QueryRegistry;
 import org.eclipse.mat.query.registry.QueryResult;
 import org.eclipse.mat.report.SpecFactory;
 import org.eclipse.mat.snapshot.ISnapshot;
 import org.eclipse.mat.snapshot.SnapshotInfo;
 import org.eclipse.mat.ui.MemoryAnalyserPlugin;
 import org.eclipse.mat.ui.Messages;
 import org.eclipse.mat.ui.QueryExecution;
 import org.eclipse.mat.ui.editor.AbstractEditorPane;
 import org.eclipse.mat.ui.editor.AbstractPaneJob;
 import org.eclipse.mat.ui.editor.EditorPaneRegistry;
 import org.eclipse.mat.ui.editor.MultiPaneEditorSite;
 import org.eclipse.mat.ui.snapshot.editor.HeapEditor;
 import org.eclipse.mat.ui.snapshot.editor.HeapEditorPane;
 import org.eclipse.mat.ui.util.ErrorHelper;
 import org.eclipse.mat.ui.util.ProgressMonitorWrapper;
 import org.eclipse.mat.util.MessageUtil;
 import org.eclipse.mat.util.Units;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.cheatsheets.OpenCheatSheetAction;
 import org.eclipse.ui.forms.events.HyperlinkEvent;
 import org.eclipse.ui.forms.events.IHyperlinkListener;
 import org.eclipse.ui.forms.widgets.FormText;
 import org.eclipse.ui.forms.widgets.FormToolkit;
 import org.eclipse.ui.forms.widgets.ScrolledForm;
 import org.eclipse.ui.forms.widgets.Section;
 import org.eclipse.ui.forms.widgets.TableWrapData;
 import org.eclipse.ui.forms.widgets.TableWrapLayout;

 public class OverviewPane extends HeapEditorPane implements IHyperlinkListener, ISelectionProvider
 {
     private List<ISelectionChangedListener> listeners = new ArrayList<ISelectionChangedListener>();
     private ISelectionProvider delegate;

     private FormToolkit toolkit;
     private AbstractEditorPane pane;
     private ScrolledForm form;

     public void createPartControl(Composite parent)
     {
         toolkit = new FormToolkit(parent.getDisplay());
         form = toolkit.createScrolledForm(parent);

         // TableWrapLayout tends to give vertical scroll bars when needed
         // but fits into horizontal space where possible
         TableWrapLayout layout = new TableWrapLayout();
         layout.numColumns = 3;
         layout.verticalSpacing = 20;
         form.getBody().setLayout(layout);

         Section section = createDetailsSection();
         TableWrapData td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
         section.setLayoutData(td);

         section = createBiggestObjectsSection();
         td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
         section.setLayoutData(td);

         section = createSidecarSection();
         if (section != null)
         {
             td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
             section.setLayoutData(td);
         }

         section = createActionSection();
         td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
         section.setLayoutData(td);

         section = createReportsSection();
         td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
         section.setLayoutData(td);

         section = createStepByStepSection();
         td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
         section.setLayoutData(td);

         form.reflow(true);
     }

     // //////////////////////////////////////////////////////////////
     // details
     // //////////////////////////////////////////////////////////////

     private Section createSidecarSection()
     {
         Section section = null;
         FormText text = null;

         List<QueryDescriptor> queries = QueryRegistry.instance().getQueries(Pattern.compile("supplement_.*")); //$NON-NLS-1$
         if (queries.isEmpty())
             return null;

         Collections.sort(queries, new Comparator<QueryDescriptor>()
         {
             public int compare(QueryDescriptor o1, QueryDescriptor o2)
             {
                 return o1.getName().compareTo(o2.getName());
             }
         });

         StringBuilder buf = new StringBuilder();
         buf.append("<form>");//$NON-NLS-1$
         for (QueryDescriptor query : queries)
         {
             if (query.accept(getQueryContext()))
             {
                 if (section == null)
                 {
                     section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED
                                     | Section.TWISTIE);
                     section.setText(Messages.OverviewPane_AdditionalInfo);
                     Composite sectionClient = toolkit.createComposite(section);
                     sectionClient.setLayout(new TableWrapLayout());
                     text = toolkit.createFormText(sectionClient, true);
                     text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
                     text.addHyperlinkListener(this);

                     section.setClient(sectionClient);
                 }

                 addButton(buf, text, query.getIdentifier(), null, query.getName(), query.getHelp());
             }
         }
         buf.append("</form>");//$NON-NLS-1$

         if (text != null)
             text.setText(buf.toString(), true, false);

         return section;
     }

     private Section createDetailsSection()
     {
         Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED | Section.TWISTIE);
         section.setText(Messages.OverviewPane_Details);
         Composite sectionClient = toolkit.createComposite(section);
         sectionClient.setLayout(new TableWrapLayout());
         FormText text = toolkit.createFormText(sectionClient, true);
         text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));

         SnapshotInfo info = getSnapshotInput().getSnapshot().getSnapshotInfo();

         StringBuilder buf = new StringBuilder();
         buf.append("<form>");//$NON-NLS-1$

         buf.append("<p>" + Messages.OverviewPane_Size);//$NON-NLS-1$
         long heapSize = info.getUsedHeapSize();
         String size = Units.Storage.of(heapSize).format(heapSize);
         buf.append("<b>" + size + "</b>");//$NON-NLS-1$//$NON-NLS-2$

         buf.append("  " + Messages.OverviewPane_Classes); //$NON-NLS-1$
         buf.append("<b>" + formatNumber(info.getNumberOfClasses()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

         buf.append("  " + Messages.OverviewPane_Objects); //$NON-NLS-1$
         buf.append("<b>" + formatNumber(info.getNumberOfObjects()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

         buf.append("  " + Messages.OverviewPane_ClassLoader); //$NON-NLS-1$
         buf.append("<b>" + formatNumber(info.getNumberOfClassLoaders()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

         QueryDescriptor descriptor = QueryRegistry.instance().getQuery("unreachable_objects"); //$NON-NLS-1$
         if (descriptor != null && descriptor.accept(getQueryContext()))
         {
             buf.append("  <a href=\"").append(descriptor.getIdentifier()) // //$NON-NLS-1$
                             .append("\">").append(descriptor.getName()).append("</a>");//$NON-NLS-1$//$NON-NLS-2$
         }

         buf.append("</p></form>");//$NON-NLS-1$
         text.setText(buf.toString(), true, false);
         text.addHyperlinkListener(this);

         section.setClient(sectionClient);
         return section;
     }

     private String formatNumber(int number)
     {
         return Units.Plain.of(number).format(number);
     }

     // //////////////////////////////////////////////////////////////
     // actions
     // //////////////////////////////////////////////////////////////

     private Section createActionSection()
     {
         Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED | Section.TWISTIE);
         section.setText(Messages.OverviewPane_Actions);

         Composite sectionClient = toolkit.createComposite(section);
         sectionClient.setLayout(new TableWrapLayout());

         FormText text = toolkit.createFormText(sectionClient, true);
         text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
         StringBuilder buf = new StringBuilder();
         buf.append("<form>");//$NON-NLS-1$

         addButton(buf, text, "histogram", null, Messages.OverviewPane_Histogram, Messages.OverviewPane_HistogramInfo); //$NON-NLS-1$
         addButton(buf, text, "dominator_tree", null, Messages.OverviewPane_DominatorTree, //$NON-NLS-1$
                         Messages.OverviewPane_DominatorTreeInfo);
         addButton(buf, text, "top_consumers_html", null, Messages.OverviewPane_TopConsumers, //$NON-NLS-1$
                         Messages.OverviewPane_TopConsumersInfo);
         addButton(buf, text, "duplicate_classes", null, Messages.OverviewPane_DuplicateClasses, //$NON-NLS-1$
                         Messages.OverviewPane_DuplicateClassesInfo);

         buf.append("</form>");//$NON-NLS-1$
         text.setText(buf.toString(), true, false);
         text.addHyperlinkListener(this);

         section.setClient(sectionClient);
         return section;
     }

     private Section createReportsSection()
     {
         Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED | Section.TWISTIE);
         section.setText(Messages.OverviewPane_Reports);

         Composite sectionClient = toolkit.createComposite(section);
         sectionClient.setLayout(new TableWrapLayout());

         FormText text = toolkit.createFormText(sectionClient, true);
         StringBuilder buf = new StringBuilder();
         buf.append("<form>");//$NON-NLS-1$

         addReportsByPattern(text, buf, Pattern.compile(".*:suspects"));//$NON-NLS-1$
         addReportsByPattern(text, buf, Pattern.compile(".*:top_components"));//$NON-NLS-1$
         addReportsByPattern2(text, buf, Pattern.compile(".*:suspects2"));//$NON-NLS-1$

         buf.append("</form>");//$NON-NLS-1$
         text.setText(buf.toString(), true, false);
         text.addHyperlinkListener(this);

         section.setClient(sectionClient);
         return section;
     }

     private void addReportsByPattern(FormText text, StringBuilder buf, Pattern pattern)
     {
         for (SpecFactory.Report report : SpecFactory.instance().delegates())
         {
             if (pattern.matcher(report.getExtensionIdentifier()).matches())
                 addButton(buf, text, "create_report", "default_report " + report.getExtensionIdentifier(), report//$NON-NLS-1$//$NON-NLS-2$
                                 .getName(), report.getDescription());
         }
     }

     private void addReportsByPattern2(FormText text, StringBuilder buf, Pattern pattern)
     {
         for (SpecFactory.Report report : SpecFactory.instance().delegates())
         {
             if (pattern.matcher(report.getExtensionIdentifier()).matches())
             {
                 String name = report.getName();
                 // Allow hidden category report, but remove category
                 if (name.startsWith(Category.HIDDEN + "/")) //$NON-NLS-1$
                     name = name.substring(Category.HIDDEN.length() + 1);
                 addButton(buf, text, "create_report", "comparison_report " + report.getExtensionIdentifier(), name, //$NON-NLS-1$//$NON-NLS-2$
                                 report.getDescription());
             }
         }
     }

     private Section createStepByStepSection()
     {
         Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED | Section.TWISTIE);
         section.setText(Messages.OverviewPane_StepByStep);

         Composite sectionClient = toolkit.createComposite(section);
         sectionClient.setLayout(new TableWrapLayout());

         FormText text = toolkit.createFormText(sectionClient, true);
         StringBuilder buf = new StringBuilder();
         buf.append("<form>");//$NON-NLS-1$

         addCheatSheetLink(buf, "org.eclipse.mat.tutorials.component_report", Messages.OverviewPane_ComponentReport, //$NON-NLS-1$
                         Messages.OverviewPane_ComponentReportInfo);

         buf.append("</form>");//$NON-NLS-1$
         text.setText(buf.toString(), true, false);
         text.addHyperlinkListener(new IHyperlinkListener()
         {
             public void linkActivated(HyperlinkEvent e)
             {
                 new OpenCheatSheetAction(String.valueOf(e.getHref())).run();
             }

             public void linkEntered(HyperlinkEvent e)
             {}

             public void linkExited(HyperlinkEvent e)
             {}
         });

         section.setClient(sectionClient);
         return section;
     }

     private void addCheatSheetLink(StringBuilder buf, String cheatSheetId, String title, String help)
     {
         buf.append("<li style=\"text\" value=\"\">");//$NON-NLS-1$
         buf.append("<a href=\"").append(cheatSheetId).append("\">").append(title).append("</a>");//$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
         if (help != null)
             buf.append(": ").append(help);//$NON-NLS-1$
         buf.append("</li>");//$NON-NLS-1$
     }

     private void addButton(StringBuilder buf, FormText formText, String commandId, String command, String title,
                     String help)
     {
         QueryDescriptor descriptor = QueryRegistry.instance().getQuery(commandId);
         if (descriptor == null)
             return;

         if (command == null)
             command = descriptor.getIdentifier();

         Image image = MemoryAnalyserPlugin.getDefault().getImage(descriptor);
         if (image != null)
         {
             buf.append("<li style=\"image\" value=\"").append(descriptor.getIdentifier()).append("\">");//$NON-NLS-1$//$NON-NLS-2$
             formText.setImage(descriptor.getIdentifier(), image);
         }
         else
         {
             buf.append("<li style=\"text\" value=\"\">");//$NON-NLS-1$
         }

         buf.append("<a href=\"").append(command).append("\">").append(title).append("</a>");//$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
         if (help != null)
             buf.append(": ").append(help);//$NON-NLS-1$
         buf.append("</li>");//$NON-NLS-1$
     }

     // //////////////////////////////////////////////////////////////
     // biggest objects
     // //////////////////////////////////////////////////////////////

     private Section createBiggestObjectsSection()
     {
         final Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR | Section.EXPANDED
                         | Section.TWISTIE);
         section.setText(Messages.OverviewPane_BiggestObjectsByRetainedSIze);

         final Composite sectionClient = toolkit.createComposite(section);

         if (Platform.getBundle("org.eclipse.mat.chart.ui") == null)//$NON-NLS-1$
         {
             sectionClient.setLayout(new TableWrapLayout());

             FormText text = toolkit.createFormText(sectionClient, true);
             StringBuilder buf = new StringBuilder(256);

             buf.append("<form><li style=\"text\" value=\"\">"); //$NON-NLS-1$
             buf.append(MessageUtil.format(Messages.OverviewPane_NoPieChartAvailable,
                             "dominator_tree", "top_consumers_html")); //$NON-NLS-1$ //$NON-NLS-2$
             buf.append("</li></form>"); //$NON-NLS-1$

             text.setText(buf.toString(), true, false);
             text.addHyperlinkListener(this);
         }
         else
         {
             FillLayout layout = new FillLayout();
             sectionClient.setLayout(layout);

             final ISnapshot snapshot = getSnapshotInput().getSnapshot();

             new AbstractPaneJob(Messages.OverviewPane_ExtractingBigObjects, this)
             {
                 @Override
                 protected IStatus doRun(IProgressMonitor monitor)
                 {
                     try
                     {
                         SnapshotQueryContext ctx = new SnapshotQueryContext(snapshot);
                         final IResult result = CommandLine.execute(ctx, "pie_biggest_objects",//$NON-NLS-1$
                                         new ProgressMonitorWrapper(monitor));

                         sectionClient.getDisplay().asyncExec(new Runnable()
                         {
                             public void run()
                             {
                                 try
                                 {
                                     pane = EditorPaneRegistry.instance().createNewPane(result, null);

                                     pane.init(getEditorSite(), getEditorInput());
                                     pane.createPartControl(sectionClient);
                                     pane.initWithArgument(new QueryResult(null, "pie_biggest_objects", result));//$NON-NLS-1$
                                     form.reflow(true);

                                     if (pane instanceof ISelectionProvider)
                                     {
                                         delegate = (ISelectionProvider) pane;

                                         for (ISelectionChangedListener l : listeners)
                                             delegate.addSelectionChangedListener(l);
                                     }
                                 }
                                 catch (PartInitException e)
                                 {
                                     ErrorHelper.logThrowableAndShowMessage(e);
                                 }
                             }
                         });

                         return Status.OK_STATUS;
                     }
                     catch (SnapshotException e)
                     {
                         return ErrorHelper.createErrorStatus(e);
                     }

                 }
             }.schedule();
         }

         section.setClient(sectionClient);
         return section;
     }

     // //////////////////////////////////////////////////////////////
     // hyper-link listener
     // //////////////////////////////////////////////////////////////

     public void linkActivated(HyperlinkEvent e)
     {
         String command = String.valueOf(e.getHref());
         runCommand(command);
     }

     private void runCommand(String command)
     {
         try
         {
             HeapEditor heapEditor = (HeapEditor) ((MultiPaneEditorSite) getSite()).getMultiPageEditor();
             QueryExecution.executeCommandLine(heapEditor, this.getPaneState(), command);
         }
         catch (SnapshotException exp)
         {
             ErrorHelper.logThrowableAndShowMessage(exp);
         }
     }

     public void linkEntered(HyperlinkEvent e)
     {}

     public void linkExited(HyperlinkEvent e)
     {}

     // //////////////////////////////////////////////////////////////
     // misc
     // //////////////////////////////////////////////////////////////

     public String getTitle()
     {
         return Messages.OverviewPane_Overview;
     }

     @Override
     public Image getTitleImage()
     {
         return MemoryAnalyserPlugin.getImage(MemoryAnalyserPlugin.ISharedImages.INFO);
     }

     @Override
     public void setFocus()
     {
         form.setFocus();
     }

     // //////////////////////////////////////////////////////////////
     // selection provider
     // //////////////////////////////////////////////////////////////

     public void addSelectionChangedListener(ISelectionChangedListener listener)
     {
         listeners.add(listener);
         if (delegate != null)
             delegate.addSelectionChangedListener(listener);
     }

     public void removeSelectionChangedListener(ISelectionChangedListener listener)
     {
         listeners.remove(listener);
         if (delegate != null)
             delegate.removeSelectionChangedListener(listener);
     }

     public ISelection getSelection()
     {
         if (delegate != null)
             return delegate.getSelection();
         else
             return StructuredSelection.EMPTY;
     }

     public void setSelection(ISelection selection)
     {}

     @Override
     public void dispose()
     {
         super.dispose();
         if (pane != null)
         {
             pane.dispose();
             pane = null;
         }
     }
 }
	/*******************************************************************************
	* Copyright (c) 2008, 2020 SAP AG, 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:
	* SAP AG - initial API and implementation
	* Andrew Johnson (IBM Corporation) - comparisons
	*******************************************************************************/
	package org.eclipse.mat.ui.snapshot.panes;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.List;
	import java.util.regex.Pattern;

	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.ISelectionProvider;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.mat.SnapshotException;
	import org.eclipse.mat.internal.snapshot.SnapshotQueryContext;
	import org.eclipse.mat.query.IResult;
	import org.eclipse.mat.query.annotations.Category;
	import org.eclipse.mat.query.registry.CommandLine;
	import org.eclipse.mat.query.registry.QueryDescriptor;
	import org.eclipse.mat.query.registry.QueryRegistry;
	import org.eclipse.mat.query.registry.QueryResult;
	import org.eclipse.mat.report.SpecFactory;
	import org.eclipse.mat.snapshot.ISnapshot;
	import org.eclipse.mat.snapshot.SnapshotInfo;
	import org.eclipse.mat.ui.MemoryAnalyserPlugin;
	import org.eclipse.mat.ui.Messages;
	import org.eclipse.mat.ui.QueryExecution;
	import org.eclipse.mat.ui.editor.AbstractEditorPane;
	import org.eclipse.mat.ui.editor.AbstractPaneJob;
	import org.eclipse.mat.ui.editor.EditorPaneRegistry;
	import org.eclipse.mat.ui.editor.MultiPaneEditorSite;
	import org.eclipse.mat.ui.snapshot.editor.HeapEditor;
	import org.eclipse.mat.ui.snapshot.editor.HeapEditorPane;
	import org.eclipse.mat.ui.util.ErrorHelper;
	import org.eclipse.mat.ui.util.ProgressMonitorWrapper;
	import org.eclipse.mat.util.MessageUtil;
	import org.eclipse.mat.util.Units;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.ui.PartInitException;
	import org.eclipse.ui.cheatsheets.OpenCheatSheetAction;
	import org.eclipse.ui.forms.events.HyperlinkEvent;
	import org.eclipse.ui.forms.events.IHyperlinkListener;
	import org.eclipse.ui.forms.widgets.FormText;
	import org.eclipse.ui.forms.widgets.FormToolkit;
	import org.eclipse.ui.forms.widgets.ScrolledForm;
	import org.eclipse.ui.forms.widgets.Section;
	import org.eclipse.ui.forms.widgets.TableWrapData;
	import org.eclipse.ui.forms.widgets.TableWrapLayout;

	public class OverviewPane extends HeapEditorPane implements IHyperlinkListener, ISelectionProvider
	{
	private List<ISelectionChangedListener> listeners = new ArrayList<ISelectionChangedListener>();
	private ISelectionProvider delegate;

	private FormToolkit toolkit;
	private AbstractEditorPane pane;
	private ScrolledForm form;

	public void createPartControl(Composite parent)
	{
	toolkit = new FormToolkit(parent.getDisplay());
	form = toolkit.createScrolledForm(parent);

	// TableWrapLayout tends to give vertical scroll bars when needed
	// but fits into horizontal space where possible
	TableWrapLayout layout = new TableWrapLayout();
	layout.numColumns = 3;
	layout.verticalSpacing = 20;
	form.getBody().setLayout(layout);

	Section section = createDetailsSection();
	TableWrapData td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
	section.setLayoutData(td);

	section = createBiggestObjectsSection();
	td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
	section.setLayoutData(td);

	section = createSidecarSection();
	if (section != null)
	{
	td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 3);
	section.setLayoutData(td);
	}

	section = createActionSection();
	td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
	section.setLayoutData(td);

	section = createReportsSection();
	td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
	section.setLayoutData(td);

	section = createStepByStepSection();
	td = new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.FILL_GRAB, 1, 1);
	section.setLayoutData(td);

	form.reflow(true);
	}

	// //////////////////////////////////////////////////////////////
	// details
	// //////////////////////////////////////////////////////////////

	private Section createSidecarSection()
	{
	Section section = null;
	FormText text = null;

	List<QueryDescriptor> queries = QueryRegistry.instance().getQueries(Pattern.compile("supplement_.*")); //$NON-NLS-1$
	if (queries.isEmpty())
	return null;

	Collections.sort(queries, new Comparator<QueryDescriptor>()
	{
	public int compare(QueryDescriptor o1, QueryDescriptor o2)
	{
	return o1.getName().compareTo(o2.getName());
	}
	});

	StringBuilder buf = new StringBuilder();
	buf.append("<form>");//$NON-NLS-1$
	for (QueryDescriptor query : queries)
	{
	if (query.accept(getQueryContext()))
	{
	if (section == null)
	{
	section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED
	\| Section.TWISTIE);
	section.setText(Messages.OverviewPane_AdditionalInfo);
	Composite sectionClient = toolkit.createComposite(section);
	sectionClient.setLayout(new TableWrapLayout());
	text = toolkit.createFormText(sectionClient, true);
	text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
	text.addHyperlinkListener(this);

	section.setClient(sectionClient);
	}

	addButton(buf, text, query.getIdentifier(), null, query.getName(), query.getHelp());
	}
	}
	buf.append("</form>");//$NON-NLS-1$

	if (text != null)
	text.setText(buf.toString(), true, false);

	return section;
	}

	private Section createDetailsSection()
	{
	Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED \| Section.TWISTIE);
	section.setText(Messages.OverviewPane_Details);
	Composite sectionClient = toolkit.createComposite(section);
	sectionClient.setLayout(new TableWrapLayout());
	FormText text = toolkit.createFormText(sectionClient, true);
	text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));

	SnapshotInfo info = getSnapshotInput().getSnapshot().getSnapshotInfo();

	StringBuilder buf = new StringBuilder();
	buf.append("<form>");//$NON-NLS-1$

	buf.append("<p>" + Messages.OverviewPane_Size);//$NON-NLS-1$
	long heapSize = info.getUsedHeapSize();
	String size = Units.Storage.of(heapSize).format(heapSize);
	buf.append("<b>" + size + "</b>");//$NON-NLS-1$//$NON-NLS-2$

	buf.append(" " + Messages.OverviewPane_Classes); //$NON-NLS-1$
	buf.append("<b>" + formatNumber(info.getNumberOfClasses()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

	buf.append(" " + Messages.OverviewPane_Objects); //$NON-NLS-1$
	buf.append("<b>" + formatNumber(info.getNumberOfObjects()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

	buf.append(" " + Messages.OverviewPane_ClassLoader); //$NON-NLS-1$
	buf.append("<b>" + formatNumber(info.getNumberOfClassLoaders()) + "</b>");//$NON-NLS-1$//$NON-NLS-2$

	QueryDescriptor descriptor = QueryRegistry.instance().getQuery("unreachable_objects"); //$NON-NLS-1$
	if (descriptor != null && descriptor.accept(getQueryContext()))
	{
	buf.append(" <a href=\"").append(descriptor.getIdentifier()) // //$NON-NLS-1$
	.append("\">").append(descriptor.getName()).append("</a>");//$NON-NLS-1$//$NON-NLS-2$
	}

	buf.append("</p></form>");//$NON-NLS-1$
	text.setText(buf.toString(), true, false);
	text.addHyperlinkListener(this);

	section.setClient(sectionClient);
	return section;
	}

	private String formatNumber(int number)
	{
	return Units.Plain.of(number).format(number);
	}

	// //////////////////////////////////////////////////////////////
	// actions
	// //////////////////////////////////////////////////////////////

	private Section createActionSection()
	{
	Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED \| Section.TWISTIE);
	section.setText(Messages.OverviewPane_Actions);

	Composite sectionClient = toolkit.createComposite(section);
	sectionClient.setLayout(new TableWrapLayout());

	FormText text = toolkit.createFormText(sectionClient, true);
	text.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
	StringBuilder buf = new StringBuilder();
	buf.append("<form>");//$NON-NLS-1$

	addButton(buf, text, "histogram", null, Messages.OverviewPane_Histogram, Messages.OverviewPane_HistogramInfo); //$NON-NLS-1$
	addButton(buf, text, "dominator_tree", null, Messages.OverviewPane_DominatorTree, //$NON-NLS-1$
	Messages.OverviewPane_DominatorTreeInfo);
	addButton(buf, text, "top_consumers_html", null, Messages.OverviewPane_TopConsumers, //$NON-NLS-1$
	Messages.OverviewPane_TopConsumersInfo);
	addButton(buf, text, "duplicate_classes", null, Messages.OverviewPane_DuplicateClasses, //$NON-NLS-1$
	Messages.OverviewPane_DuplicateClassesInfo);

	buf.append("</form>");//$NON-NLS-1$
	text.setText(buf.toString(), true, false);
	text.addHyperlinkListener(this);

	section.setClient(sectionClient);
	return section;
	}

	private Section createReportsSection()
	{
	Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED \| Section.TWISTIE);
	section.setText(Messages.OverviewPane_Reports);

	Composite sectionClient = toolkit.createComposite(section);
	sectionClient.setLayout(new TableWrapLayout());

	FormText text = toolkit.createFormText(sectionClient, true);
	StringBuilder buf = new StringBuilder();
	buf.append("<form>");//$NON-NLS-1$

	addReportsByPattern(text, buf, Pattern.compile(".*:suspects"));//$NON-NLS-1$
	addReportsByPattern(text, buf, Pattern.compile(".*:top_components"));//$NON-NLS-1$
	addReportsByPattern2(text, buf, Pattern.compile(".*:suspects2"));//$NON-NLS-1$

	buf.append("</form>");//$NON-NLS-1$
	text.setText(buf.toString(), true, false);
	text.addHyperlinkListener(this);

	section.setClient(sectionClient);
	return section;
	}

	private void addReportsByPattern(FormText text, StringBuilder buf, Pattern pattern)
	{
	for (SpecFactory.Report report : SpecFactory.instance().delegates())
	{
	if (pattern.matcher(report.getExtensionIdentifier()).matches())
	addButton(buf, text, "create_report", "default_report " + report.getExtensionIdentifier(), report//$NON-NLS-1$//$NON-NLS-2$
	.getName(), report.getDescription());
	}
	}

	private void addReportsByPattern2(FormText text, StringBuilder buf, Pattern pattern)
	{
	for (SpecFactory.Report report : SpecFactory.instance().delegates())
	{
	if (pattern.matcher(report.getExtensionIdentifier()).matches())
	{
	String name = report.getName();
	// Allow hidden category report, but remove category
	if (name.startsWith(Category.HIDDEN + "/")) //$NON-NLS-1$
	name = name.substring(Category.HIDDEN.length() + 1);
	addButton(buf, text, "create_report", "comparison_report " + report.getExtensionIdentifier(), name, //$NON-NLS-1$//$NON-NLS-2$
	report.getDescription());
	}
	}
	}

	private Section createStepByStepSection()
	{
	Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED \| Section.TWISTIE);
	section.setText(Messages.OverviewPane_StepByStep);

	Composite sectionClient = toolkit.createComposite(section);
	sectionClient.setLayout(new TableWrapLayout());

	FormText text = toolkit.createFormText(sectionClient, true);
	StringBuilder buf = new StringBuilder();
	buf.append("<form>");//$NON-NLS-1$

	addCheatSheetLink(buf, "org.eclipse.mat.tutorials.component_report", Messages.OverviewPane_ComponentReport, //$NON-NLS-1$
	Messages.OverviewPane_ComponentReportInfo);

	buf.append("</form>");//$NON-NLS-1$
	text.setText(buf.toString(), true, false);
	text.addHyperlinkListener(new IHyperlinkListener()
	{
	public void linkActivated(HyperlinkEvent e)
	{
	new OpenCheatSheetAction(String.valueOf(e.getHref())).run();
	}

	public void linkEntered(HyperlinkEvent e)
	{}

	public void linkExited(HyperlinkEvent e)
	{}
	});

	section.setClient(sectionClient);
	return section;
	}

	private void addCheatSheetLink(StringBuilder buf, String cheatSheetId, String title, String help)
	{
	buf.append("<li style=\"text\" value=\"\">");//$NON-NLS-1$
	buf.append("<a href=\"").append(cheatSheetId).append("\">").append(title).append("</a>");//$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
	if (help != null)
	buf.append(": ").append(help);//$NON-NLS-1$
	buf.append("</li>");//$NON-NLS-1$
	}

	private void addButton(StringBuilder buf, FormText formText, String commandId, String command, String title,
	String help)
	{
	QueryDescriptor descriptor = QueryRegistry.instance().getQuery(commandId);
	if (descriptor == null)
	return;

	if (command == null)
	command = descriptor.getIdentifier();

	Image image = MemoryAnalyserPlugin.getDefault().getImage(descriptor);
	if (image != null)
	{
	buf.append("<li style=\"image\" value=\"").append(descriptor.getIdentifier()).append("\">");//$NON-NLS-1$//$NON-NLS-2$
	formText.setImage(descriptor.getIdentifier(), image);
	}
	else
	{
	buf.append("<li style=\"text\" value=\"\">");//$NON-NLS-1$
	}

	buf.append("<a href=\"").append(command).append("\">").append(title).append("</a>");//$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
	if (help != null)
	buf.append(": ").append(help);//$NON-NLS-1$
	buf.append("</li>");//$NON-NLS-1$
	}

	// //////////////////////////////////////////////////////////////
	// biggest objects
	// //////////////////////////////////////////////////////////////

	private Section createBiggestObjectsSection()
	{
	final Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR \| Section.EXPANDED
	\| Section.TWISTIE);
	section.setText(Messages.OverviewPane_BiggestObjectsByRetainedSIze);

	final Composite sectionClient = toolkit.createComposite(section);

	if (Platform.getBundle("org.eclipse.mat.chart.ui") == null)//$NON-NLS-1$
	{
	sectionClient.setLayout(new TableWrapLayout());

	FormText text = toolkit.createFormText(sectionClient, true);
	StringBuilder buf = new StringBuilder(256);

	buf.append("<form><li style=\"text\" value=\"\">"); //$NON-NLS-1$
	buf.append(MessageUtil.format(Messages.OverviewPane_NoPieChartAvailable,
	"dominator_tree", "top_consumers_html")); //$NON-NLS-1$ //$NON-NLS-2$
	buf.append("</li></form>"); //$NON-NLS-1$

	text.setText(buf.toString(), true, false);
	text.addHyperlinkListener(this);
	}
	else
	{
	FillLayout layout = new FillLayout();
	sectionClient.setLayout(layout);

	final ISnapshot snapshot = getSnapshotInput().getSnapshot();

	new AbstractPaneJob(Messages.OverviewPane_ExtractingBigObjects, this)
	{
	@Override
	protected IStatus doRun(IProgressMonitor monitor)
	{
	try
	{
	SnapshotQueryContext ctx = new SnapshotQueryContext(snapshot);
	final IResult result = CommandLine.execute(ctx, "pie_biggest_objects",//$NON-NLS-1$
	new ProgressMonitorWrapper(monitor));

	sectionClient.getDisplay().asyncExec(new Runnable()
	{
	public void run()
	{
	try
	{
	pane = EditorPaneRegistry.instance().createNewPane(result, null);

	pane.init(getEditorSite(), getEditorInput());
	pane.createPartControl(sectionClient);
	pane.initWithArgument(new QueryResult(null, "pie_biggest_objects", result));//$NON-NLS-1$
	form.reflow(true);

	if (pane instanceof ISelectionProvider)
	{
	delegate = (ISelectionProvider) pane;

	for (ISelectionChangedListener l : listeners)
	delegate.addSelectionChangedListener(l);
	}
	}
	catch (PartInitException e)
	{
	ErrorHelper.logThrowableAndShowMessage(e);
	}
	}
	});

	return Status.OK_STATUS;
	}
	catch (SnapshotException e)
	{
	return ErrorHelper.createErrorStatus(e);
	}

	}
	}.schedule();
	}

	section.setClient(sectionClient);
	return section;
	}

	// //////////////////////////////////////////////////////////////
	// hyper-link listener
	// //////////////////////////////////////////////////////////////

	public void linkActivated(HyperlinkEvent e)
	{
	String command = String.valueOf(e.getHref());
	runCommand(command);
	}

	private void runCommand(String command)
	{
	try
	{
	HeapEditor heapEditor = (HeapEditor) ((MultiPaneEditorSite) getSite()).getMultiPageEditor();
	QueryExecution.executeCommandLine(heapEditor, this.getPaneState(), command);
	}
	catch (SnapshotException exp)
	{
	ErrorHelper.logThrowableAndShowMessage(exp);
	}
	}

	public void linkEntered(HyperlinkEvent e)
	{}

	public void linkExited(HyperlinkEvent e)
	{}

	// //////////////////////////////////////////////////////////////
	// misc
	// //////////////////////////////////////////////////////////////

	public String getTitle()
	{
	return Messages.OverviewPane_Overview;
	}

	@Override
	public Image getTitleImage()
	{
	return MemoryAnalyserPlugin.getImage(MemoryAnalyserPlugin.ISharedImages.INFO);
	}

	@Override
	public void setFocus()
	{
	form.setFocus();
	}

	// //////////////////////////////////////////////////////////////
	// selection provider
	// //////////////////////////////////////////////////////////////

	public void addSelectionChangedListener(ISelectionChangedListener listener)
	{
	listeners.add(listener);
	if (delegate != null)
	delegate.addSelectionChangedListener(listener);
	}

	public void removeSelectionChangedListener(ISelectionChangedListener listener)
	{
	listeners.remove(listener);
	if (delegate != null)
	delegate.removeSelectionChangedListener(listener);
	}

	public ISelection getSelection()
	{
	if (delegate != null)
	return delegate.getSelection();
	else
	return StructuredSelection.EMPTY;
	}

	public void setSelection(ISelection selection)
	{}

	@Override
	public void dispose()
	{
	super.dispose();
	if (pane != null)
	{
	pane.dispose();
	pane = null;
	}
	}
	}