[Webkit-unassigned] [Bug 29183] New: refactor event handling code in WI.Object to make it mixin-able

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=29183

           Summary: refactor event handling code in WI.Object to make it
                    mixin-able
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pmuellr at yahoo.com


The current event handling logic in WebInspector.Object (Object.js) is quite
nice, but could be made more consumable.

Rather than require someone who wants to use it to subclass this class, seems
like it would be nice to able to "mixin" the functionality, at an event level. 
For instance, conceptually I might have a class which has some events, and for
each event I might be able to do something like:

    WebInspector.EventMixin.add(myClass, "fooBar")

which would add the methods to the class's prototype

   addFooBarListener(...)
   removeFooBarListener(...)
   _dispatchFooBarEvent(...)

These messages would lazily create a _fooBarEventListeners property as needed. 
Or something.

This would then be useful to use instead of the current single-listener event
handlers like onattach, onpopulate, etc, in TreeOutline, so that you could have
more than one listener without jumping through nasty hoops like daisy chaining
them (I assume you could daisy chain them in simple cases).

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