9.7. Existing Commands
So far this discussion has covered XUL, AOM, and XPCOM aspects of command delivery in the Mozilla Platform. Mozilla, however, is a finished application (Classic Mozilla) as well as a platform. Some application commands are provided with the platform. Application programmers sometimes reuse or exploit these platform features. There are several opportunities to do so.
The focus controller is a very simple example of reusing existing technology. This controller is always available in a XUL window. The command dispatcher contains advanceFocus() and rewindFocus() methods that automate Tab-style navigation that the user normally does. These methods effectively send commands to the focus controller. The controller can also be ...
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