Override Eclipse File > Save Action - eclipse

Question

I am trying to override the Eclipse File > Save menu action to add some functionality.
I have tried the following things
a) Create a new action and add it to the global action handler
actionBars.setGlobalActionHandler(ActionFactory.SAVE.getId(), mySaveAction);
actionRegistry.registerAction(action);
b) Create a new handler and override the save command
<extension point="org.eclipse.ui.handlers">
<handler commandId="org.eclipse.ui.file.save"
class="com.diagrams.ui.SaveFileHandler">
<enabledWhen>
<with variable="activePartId">
<equals
value="com.diagrams.editors.MultiPageEditor" />
</with>
</enabledWhen>
<activeWhen>
<with variable="activePartId">
<equals
value="com.diagrams.editors.MultiPageEditor" />
</with>
</activeWhen>
</handler>
</extension>
With both these approaches I have been able to override the Keyboard Ctrl+S functionality but the "File > Save" menu seem to work differently.
Would really appreciate any help, Thanks

Answer 1

In an RCP application, you can contribute the Save action in your ActionBarAdvisor. This also registers the action so it is available from the save command.
But as a plugin in the Eclipse IDE, the IDE provides the ActionBarAdvisor and hooks up the Save action in the File menu. Because that's not technically a command (Actions are a step above an SWT.Selection listener) that's why you can't override the File>Save action.
However, each part provides its own save implementation, so you can do whatever you want in your MultiPageEditor.
The other option is to use org.eclipse.ui.commands.ICommandService.addExecutionListener(IExecutionListener) and add an IExecutionListener (or IEL2). That can listen for the save command, the ID is declared in org.eclipse.ui.IWorkbenchCommandConstants.

Answer 2

It might have something to do with the activePartId being different when the main menu is selected versus a keystroke or using the right-click menu. Have you looked at other extension points?