Bug 319305

Description Samantha Chan 2010-07-08 14:49:54 EDT

1) Open a file using the XText editor.
2) In this outline view, toggle the link editor action to checked
3) Open another file using the Xtext editor
4) You will notice that the "Link editor" action is checked, which is as expected
6) Uncheck the "Link Editor" action in the second editor -> editor is not linked -> good
7) Go back to the first editor 

->  Notice that the "Link Editor" action is checked -> which is not expected as the preference is stored in a static value in LinkingHelper

->  Keep the action as checked, and select something in the editor -> Nothing in the outline view is selected.  This is because the editor check state and the LinkingHelper static value have gone into inconsistent state.  

I think there needs to be some "listener" implementation in the LinkingHelper and ask the actions to react to changes to the linking property.  Otherwise, we will easily get into inconsistent state.