Bug 162916 [Undo] [IDE] Invalid thread access from new file wizard
Build: I20061031-0656 1) Create a simple project 2) In the file system, add file "a.txt" to the project 3) Back in Eclipse, do File > New > File, select the project and enter a name of "a.txt". An internal error occurs because it is trying to open an error dialog from a modal context thread: org.eclipse.swt.SWTException: Invalid thread access at org.eclipse.swt.SWT.error(SWT.java:3407) at org.eclipse.swt.SWT.error(SWT.java:3330) at org.eclipse.swt.SWT.error(SWT.java:3301) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Shell.<init>(Shell.java:271) at org.eclipse.swt.widgets.Shell.<init>(Shell.java:357) at org.eclipse.jface.window.Window.createShell(Window.java:482) at org.eclipse.jface.window.Window.create(Window.java:425) at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1111) at org.eclipse.jface.window.Window.open(Window.java:785) at org.eclipse.jface.dialogs.ErrorDialog.open(ErrorDialog.java:296) at org.eclipse.jface.dialogs.ErrorDialog.openError(ErrorDialog.java:360) at org.eclipse.jface.dialogs.ErrorDialog.openError(ErrorDialog.java:325) at org.eclipse.ui.dialogs.WizardNewFileCreationPage$4.run(WizardNewFileCreationPage.java:343) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:113)
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardNewFileCreationPage.java
}
        newFile = newFileHandle;
        return newFile;
    }
    /**
     * Returns the scheduling rule to use when creating the resource at
     * the given container path. The rule should be the creation rule for
     * the top-most non-existing parent.
     * @param resource The resource being created
     * @return The scheduling rule for creating the given resource
     * @since 3.1
     * @deprecated As of 3.3, scheduling rules are provided by the undoable
     * operation that this page creates and executes.
     */
    protected ISchedulingRule createRule(IResource resource) {
		IResource parent = resource.getParent();
    	while (parent != null) {
    		if (parent.exists()) {
				return resource.getWorkspace().getRuleFactory().createRule(resource);
			}
    		resource = parent;
    		parent = parent.getParent();
    	}
		return resource.getWorkspace().getRoot();
	}
	/**
     * Returns the current full path of the containing resource as entered or 
     * selected by the user, or its anticipated initial value.
     *
     * @return the container's full path, anticipated initial value,