How can I hook into Eclipse editor events in my own plugin?

I don't want to create my own editor but I开发者_开发技巧 would like to extend existing editors by hooking into their editing events.

For example whenever the text changes in a text or xml editor I would get a callback and be able to react to the change.

Does such a suitable extension point exist?

You can do this by accessing the IEditorPart, use getAdapter(IDocument.class) and then add a listener to this...

But this is really a hack... ;-)

EDIT: On request, here is a little more code.

public void hookToEditor() {
    IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
    if (page == null) return;
    IEditorPart editor = page.getActiveEditor();
    if (editor == null) return;
    IDocument doc = (IDocument) editor.getAdapter(IDocument.class);
    if (doc == null) return;

    doc.addDocumentListener(new IDocumentListener() {
        @Override
        public void documentChanged(DocumentEvent event) {
            // Do something
        }

        @Override
        public void documentAboutToBeChanged(DocumentEvent event) {
            // About to do something
        }
    });
}

Note that

• there are many ways to get the page - e.g. via the current site
• there are just as many ways to get the editor part - e.g. via a handler
• many editors don't have a embedded document - e.g. PDE editors

You can add resource change listener.

IResourceChangeListener listener =  new IResourceChangeListener() {
    @Override
    public void resourceChanged(IResourceChangeEvent arg0) {
        System.out.println("Text changed");
    }   
};
ResourcesPlugin.getWorkspace().addResourceChangeListener(listener);