Bug 2345 [Editor Mgmt] Open with a different type of editor has no effect if file already open (1GEWMSQ)
Reproduce the steps in: 1GEWMOZ: ITPUI:WIN2000 - Scripted resource editor example opens on XML files by default - new basic project - new file test.xml - the editor used is the scripted resource editor example, which totally ignores the XML file content - select test.xml in Navigator - choose Open With... / Default Text Editor - nothing happens; it's reactivating the scripted resource editor example Searching for an existing open file should also consider editor types. It should open a new editor on the file, because the editor type is different. NOTES:
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/OpenWithMenu.java
createMenuItem(menu, defaultEditor, preferredEditor);
        }
        
        IEditorDescriptor descriptor = registry
                .findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID);
        createMenuItem(menu, descriptor, preferredEditor);
        
        descriptor = registry
                .findEditor(IEditorRegistry.SYSTEM_INPLACE_EDITOR_ID);
        if (descriptor != null) {
            createMenuItem(menu, descriptor, preferredEditor);
        }
        createDefaultMenuItem(menu, file);
    }
	
    /**
     * Converts the IAdaptable file to IFile or null.
     */
    private IFile getFileResource() {
        if (this.file instanceof IFile) {
            return (IFile) this.file;
        }
        IResource resource = (IResource) this.file
                .getAdapter(IResource.class);
        if (resource instanceof IFile) {
            return (IFile) resource;
        }
       
        return null;
    }