Bug 29633 [EditorMgmt] "Open" menu should have Open With-->Other
While registering file associations in the preferences page is mostly a reasonable proposition, it seems that having an "Open With --> Other" option would be helpful. This came up originally for me registering .sqlj files with the Java Editor. For unrelated reasons Eclipse is getting locked up by external tools, and I keep having to re-specify my preference since I had to kill Eclipse and the workspace was not saved. The implementation may also be helpful for contributers with editors on non-file resources, as they could reuse whatever dialog pops up when Open With --> Other is presented. -Andrew
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/OpenWithMenu.java
* Returns whether this menu is dynamic.
     */
    public boolean isDynamic() {
        return true;
    }
    /**
     * Opens the given editor on the selected file.
     *
     * @param editor the editor descriptor, or null for the system editor
     */
    private void openEditor(IEditorDescriptor editor) {
        IFile file = getFileResource();
        if (file == null) {
            return;
        }
        try {
            String editorId = editor == null ? IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID
                    : editor.getId();
            ((WorkbenchPage) page).openEditor(new FileEditorInput(file), editorId, true, MATCH_BOTH);
            
            IDE.setDefaultEditor(file, editorId);
        } catch (PartInitException e) {
            DialogUtil.openError(page.getWorkbenchWindow().getShell(),
                    IDEWorkbenchMessages.OpenWithMenu_dialogTitle,
                    e.getMessage(), e);
        }
    }
    /**
     * Creates the menu item for clearing the current selection.
     *