Browser control based Rich Text editor for Documentation

Symptom

The GEF control based Rich text editor provided from IBM Rational Software Architect 8.x has limitations w.r.t supporting a certain html tags rendering compared to Browser control based Rich text editor used in IBM Rational Software Architect Standard Edition 7.5.x.

These limitations result in the following types of errors while opening the IBM Rational Software Architect 7.5.x models in IBM Rational Software Architect 8.x or later and also during the usage of the GEF documentation editor.

Symptom 1: Upgrading model with a table in the Documentation, the table cells are rearranged due to unsupported colspan and rowspan attributes in the html contents.

!ENTRY org.eclipse.ui 4 0 2014-11-12 07:33:33.293
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NullPointerException
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout$CellConstraints.access$0(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.resetData(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure$LayoutNotifier.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)

Symptom 2: Upgrading model with a table in the Documentation, the table cells are rearranged due to unsupported colspan and rowspan attributes in the html contents.

java.lang.IllegalArgumentException: TableCells can only be added to FlowTables
    at com.ibm.xtools.richtext.gef.internal.figures.TableCell.checkValidParent(TableCell.java:23)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigure.setParent(FlowFigure.java:207)
    at org.eclipse.draw2d.Figure.add(Figure.java:155)

Symptom 3: Upgrading model with table in Documentation results in table and/or its contents are removed due to the internal errors.

!ENTRY com.ibm.xtools.richtext.gef 4 0 2014-11-24 06:53:16.781
!MESSAGE index=4, size=4
!STACK 0
org.eclipse.emf.common.util.BasicEList$BasicIndexOutOfBoundsException: index=4, size=4
    at org.eclipse.emf.common.util.BasicEList.get(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.TablePart.refreshChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.FlowTypePart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refresh(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.TablePart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addChild(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.FlowTypePart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.BlockContainerPart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refresh(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addChild(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.FlowTypePart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.BodyEditPart.refreshVisuals(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refresh(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(Unknown Source)
    at org.eclipse.gef.editparts.AbstractEditPart.addChild(Unknown Source)
    at org.eclipse.gef.editparts.SimpleRootEditPart.setContents(Unknown Source)
    at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(Unknown Source)
    at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(Unknown Source) ...

AND

!ENTRY org.eclipse.ui 4 0 2014-11-24 06:53:16.806
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Unknown Source)
    at org.eclipse.ui.internal.Workbench.runUI(Unknown Source)
    at org.eclipse.ui.internal.Workbench.access$4(Unknown Source)
    at org.eclipse.ui.internal.Workbench$7.run(Unknown Source)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown Source)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Unknown Source)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Unknown Source)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(Unknown Source)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(Unknown Source)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(Unknown Source)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unknown Source)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Unknown Source)
    at org.eclipse.equinox.launcher.Main.basicRun(Unknown Source)
    at org.eclipse.equinox.launcher.Main.run(Unknown Source)
    at org.eclipse.equinox.launcher.Main.main(Unknown Source)
Caused by: java.lang.NullPointerException
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout$CellConstraints.access$0(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.resetData(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure$LayoutNotifier.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layoutChildren(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.layout(Unknown Source)
    at org.eclipse.draw2d.Figure.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.validate(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.getPreferredSize(Unknown Source)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.getMinimumSize(Unknown Source) .....

Symptom 4: Copying and pasting in the documentation rich text editor, one table row information into another throws the following error in the Error log and nothing happens.

!ENTRY org.eclipse.e4.ui.workbench 4 0 2014-10-24 16:37:38.760
!MESSAGE
!STACK 0
org.eclipse.e4.core.di.InjectionException: java.lang.ClassCastException: com.ibm.xtools.richtext.emf.impl.TableRowImpl incompatible with com.ibm.xtools.richtext.emf.TableColumn
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
    at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:277)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:496)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:547)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:368)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:314)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:83)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1100)
    at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1521)
    at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4640)
    at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345)
    at org.eclipse.swt.widgets.Control.windowProc(Control.java:4528)
    at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
    at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2546)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3756)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1054)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:943)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:88)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:589)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
    at java.lang.reflect.Method.invoke(Method.java:618)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
Caused by: java.lang.ClassCastException: com.ibm.xtools.richtext.emf.impl.TableRowImpl incompatible with com.ibm.xtools.richtext.emf.TableColumn
    at com.ibm.xtools.richtext.gef.internal.editparts.TablePart.refreshChildren(TablePart.java:125)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refreshVisuals(EMFEditPart.java:139)
    at com.ibm.xtools.richtext.gef.internal.editparts.FlowTypePart.refreshVisuals(FlowTypePart.java:93)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refresh(EMFEditPart.java:117)
    at org.eclipse.gef.editparts.AbstractEditPart.addNotify(AbstractEditPart.java:253)
    at org.eclipse.gef.editparts.AbstractGraphicalEditPart.addNotify(AbstractGraphicalEditPart.java:223)
    at com.ibm.xtools.richtext.gef.internal.editparts.TablePart.addNotify(TablePart.java:56)
    at org.eclipse.gef.editparts.AbstractEditPart.addChild(AbstractEditPart.java:212)
    at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:781)
    at com.ibm.xtools.richtext.gef.internal.editparts.EMFEditPart.refreshVisuals(EMFEditPart.java:139)
    at com.ibm.xtools.richtext.gef.internal.editparts.FlowTypePart.refreshVisuals(FlowTypePart.java:93)
    at com.ibm.xtools.richtext.gef.internal.editparts.BodyEditPart.refreshVisuals(BodyEditPart.java:175)
    at com.ibm.xtools.richtext.gef.internal.notification.VisualPropertyUpdate.run(VisualPropertyUpdate.java:42)
    at com.ibm.xtools.richtext.gef.internal.notification.ViewerUpdateStrategy.executeUpdates(ViewerUpdateStrategy.java:68)
    at com.ibm.xtools.richtext.gef.internal.notification.ViewerUpdateStrategy.endBatchProcessing(ViewerUpdateStrategy.java:61)
    at com.ibm.xtools.richtext.gef.internal.notification.DomainNotifier.stackChanged(DomainNotifier.java:52)
    at org.eclipse.gef.commands.CommandStack.notifyListeners(CommandStack.java:329)
    at com.ibm.xtools.richtext.gef.internal.commands.RichTextCommandStack.notifyListeners(RichTextCommandStack.java:57)
    at com.ibm.xtools.richtext.gef.internal.commands.RichTextCommandStack.doExecute(RichTextCommandStack.java:82)
    at com.ibm.xtools.richtext.gef.internal.commands.RichTextCommandStack.execute(RichTextCommandStack.java:65)
    at com.ibm.xtools.richtext.control.internal.GEFRichText.executeCommand(GEFRichText.java:676)
    at com.ibm.xtools.richtext.control.internal.actions.PasteAction.run(PasteAction.java:45)
    at com.ibm.xtools.richtext.control.internal.util.RichtextKeyBindingHandler.execute(RichtextKeyBindingHandler.java:97)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
    at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:81)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
    at java.lang.reflect.Method.invoke(Method.java:618)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
    ... 48 more

!ENTRY org.eclipse.ui 4 0 2014-10-24 16:37:38.822
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
    at org.eclipse.swt.SWT.error(SWT.java:4361)
    at org.eclipse.swt.SWT.error(SWT.java:4276)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1054)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:943)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:88)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:589)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
    at java.lang.reflect.Method.invoke(Method.java:618)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
Caused by: java.lang.NullPointerException
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout$CellConstraints.access$0(FlowTableLayout.java:318)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.resetData(FlowTableLayout.java:207)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowTableLayout.layoutChildren(FlowTableLayout.java:145)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(FlowContainerLayout.java:97)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(FlowFigureLayout.java:100)
    at org.eclipse.draw2d.Figure$LayoutNotifier.layout(Figure.java:1976)
    at org.eclipse.draw2d.Figure.layout(Figure.java:1093)
    at org.eclipse.draw2d.Figure.validate(Figure.java:1896)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(BlockFlow.java:321)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layoutChildren(FlowContainerLayout.java:111)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowContainerLayout.layout(FlowContainerLayout.java:97)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowFigureLayout.layout(FlowFigureLayout.java:100)
    at org.eclipse.draw2d.Figure.layout(Figure.java:1093)
    at org.eclipse.draw2d.Figure.validate(Figure.java:1896)
    at com.ibm.xtools.richtext.gef.internal.figures.BlockFlow.validate(BlockFlow.java:321)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.validate(FlowPage.java:155)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.getPreferredSize(FlowPage.java:92)
    at com.ibm.xtools.richtext.gef.internal.figures.FlowPage.getMinimumSize(FlowPage.java:62)
    at org.eclipse.draw2d.StackLayout.calculateMinimumSize(StackLayout.java:44)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.BorderLayout.calculateMinimumSize(BorderLayout.java:94)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.StackLayout.calculateMinimumSize(StackLayout.java:44)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.StackLayout.calculateMinimumSize(StackLayout.java:44)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.StackLayout.calculateMinimumSize(StackLayout.java:44)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.ScalableLayeredPane.getMinimumSize(ScalableLayeredPane.java:46)
    at org.eclipse.draw2d.StackLayout.calculateMinimumSize(StackLayout.java:44)
    at org.eclipse.draw2d.AbstractHintLayout.getMinimumSize(AbstractHintLayout.java:73)
    at org.eclipse.draw2d.Figure.getMinimumSize(Figure.java:779)
    at org.eclipse.draw2d.ViewportLayout.calculatePreferredSize(ViewportLayout.java:70)
    at org.eclipse.draw2d.AbstractLayout.getPreferredSize(AbstractLayout.java:110)
    at org.eclipse.draw2d.AbstractHintLayout.getPreferredSize(AbstractHintLayout.java:90)
    at org.eclipse.draw2d.Figure.getPreferredSize(Figure.java:807)
    at org.eclipse.draw2d.ScrollPaneSolver.solve(ScrollPaneSolver.java:82)
    at org.eclipse.draw2d.FigureCanvas.layoutViewport(FigureCanvas.java:325)
    at org.eclipse.draw2d.FigureCanvas.access$4(FigureCanvas.java:323)
    at org.eclipse.draw2d.FigureCanvas$3.notifyValidating(FigureCanvas.java:292)
    at org.eclipse.draw2d.UpdateManager.fireValidating(UpdateManager.java:143)
    at org.eclipse.draw2d.DeferredUpdateManager.performValidation(DeferredUpdateManager.java:214)
    at org.eclipse.draw2d.DeferredUpdateManager.performUpdate(DeferredUpdateManager.java:190)
    at org.eclipse.draw2d.DeferredUpdateManager$UpdateRequest.run(DeferredUpdateManager.java:44)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
    ... 24 more