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
*
     * @param menu the menu to add the item to
     * @param file the file bing edited
     */
    private void createDefaultMenuItem(Menu menu, final IFile file) {
        final MenuItem menuItem = new MenuItem(menu, SWT.RADIO);
        menuItem.setSelection(IDE.getDefaultEditor(file) == null);
        menuItem.setText(IDEWorkbenchMessages.DefaultEditorDescription_name);
        Listener listener = new Listener() {
            public void handleEvent(Event event) {
                switch (event.type) {
                case SWT.Selection:
                    if (menuItem.getSelection()) {
                        IDE.setDefaultEditor(file, null);
                        try {
                            IDE.openEditor(page, file, true);
                        } catch (PartInitException e) {
                            DialogUtil.openError(page.getWorkbenchWindow()
                                    .getShell(), IDEWorkbenchMessages.OpenWithMenu_dialogTitle,
                                    e.getMessage(), e);
                        }
                    }
                    break;
                }
            }
        };
        menuItem.addListener(SWT.Selection, listener);
    }
}