NPE in outline when activating confluence editor

[Bananeweizen]

Have crazy outline active.
Switch to a Mylyn wikitext editor. NPE

That editor is a bit special in that it has different line heights and similar stuff.

eclipse.buildId=4.4.1.M20140925-0400
java.version=1.7.0_25
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE
Framework arguments:  -product org.eclipse.epp.package.modeling.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -data ..\workspace -product org.eclipse.epp.package.modeling.product

org.eclipse.ui.workbench
Error
Wed Feb 11 13:28:57 CET 2015
Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".

java.lang.NullPointerException
    at net.jeeeyul.pdetools.crazyoutline.CrazyCanvas.hook(CrazyCanvas.java:248)
    at net.jeeeyul.pdetools.crazyoutline.CrazyCanvas.<init>(CrazyCanvas.java:74)
    at net.jeeeyul.pdetools.crazyoutline.CrazyPage.createControl(CrazyPage.java:31)
    at net.jeeeyul.pdetools.crazyoutline.CrazyOutlineView.doCreatePage(CrazyOutlineView.java:39)
    at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:422)
    at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:768)
    at org.eclipse.ui.part.PageBookView$4.partActivated(PageBookView.java:1076)
    at org.eclipse.ui.internal.WorkbenchPage$17.run(WorkbenchPage.java:4870)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4867)
    at org.eclipse.ui.internal.WorkbenchPage.access$18(WorkbenchPage.java:4846)
    at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:210)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:236)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:233)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:684)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:615)
    at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:106)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:61)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070)
    at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1453)
    at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1416)
    at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2855)
    at org.eclipse.swt.widgets.Widget.wmSetFocus(Widget.java:2425)
    at org.eclipse.swt.widgets.Control.WM_SETFOCUS(Control.java:5236)
    at org.eclipse.swt.widgets.Canvas.WM_SETFOCUS(Canvas.java:456)
    at org.eclipse.swt.widgets.Control.windowProc(Control.java:4680)
    at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)
    at org.eclipse.swt.widgets.Display.windowProc(Display.java:5023)
    at org.eclipse.swt.internal.win32.OS.SetFocus(Native Method)
    at org.eclipse.swt.widgets.Control.forceFocus(Control.java:1097)
    at org.eclipse.swt.widgets.Control.setFocus(Control.java:3322)
    at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1041)
    at org.eclipse.ui.texteditor.AbstractTextEditor.setFocus(AbstractTextEditor.java:6221)
    at org.eclipse.ui.texteditor.StatusTextEditor.setFocus(StatusTextEditor.java:122)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.delegateSetFocus(CompatibilityPart.java:191)
    at sun.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:247)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:253)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:225)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:107)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.focusGui(PartRenderingEngine.java:795)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$2.setFocus(ContributedPartRenderer.java:100)
    at org.eclipse.swt.custom.CTabItem.setFocus(CTabItem.java:332)
    at org.eclipse.swt.custom.CTabFolder.setFocus(CTabFolder.java:2555)
    at org.eclipse.swt.widgets.Control.fixFocus(Control.java:1052)
    at org.eclipse.swt.widgets.Control.setVisible(Control.java:3818)
    at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3098)
    at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3106)
    at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1794)
    at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:283)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:832)
    at org.eclipse.jface.window.Window.open(Window.java:808)
    at org.eclipse.ui.internal.views.log.EventDetailsDialog.open(EventDetailsDialog.java:181)
    at org.eclipse.ui.internal.views.log.EventDetailsDialogAction.run(EventDetailsDialogAction.java:98)
    at org.eclipse.ui.internal.views.log.LogView$15.doubleClick(LogView.java:537)
    at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:831)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
    at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
    at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:828)
    at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1472)
    at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1237)
    at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:252)
    at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:249)
    at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:311)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
    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(Main.java:648)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1438)