[Gnash-commit] [bug #37223] JavaScript call didn't reach the ExternalInterface callback

[Nutchanon Wetchasit]

Follow-up Comment #2, bug #37223 (project gnash):

This issue is still reproducible under current git version of Gnash.

The root cause of this issue seems to be that Gnash uses the first argument
in
`ExternalInterface.addCallback(methodName,instance,method)` to make the
browser
aware of the registered callback, *but not using it to look up for a real
ActionScript function to call*.

Instead, Gnash tries to call `_root.methodName`, which is incorrect.

I've created HTML file and test flash file (using MTASC) to demonstrate the
root cause, by using two anonymous function, one registered as
ExternalInterface call named `script_call`, another one assigned to a
variable
`_root.script_call`.

When running `js2flash-rootcb.html` on browser with Adobe Flash Player
<http://i.imgur.com/QMswMpr.png>:

callee: starting
callee: adding ExternalInterface callback
callee: adding _root.script_call callback
caller: _root.script_call: function
callee: finished initializing
callee: entering ExternalInterface callback
callee: ExternalInterface callback succeeded, expected (Hello,World) got
(Hello,World)
callee: ExternalInterface callback finished

After 3 sec, you'd see that ExternalInterface-registered callback is called
correctly.

When running `js2flash-rootcb.html` on browser with Gnash current 0.8.11dev
git <http://i.imgur.com/8qArEK3.png>:

68 TRACE: callee: starting
68 TRACE: callee: adding ExternalInterface callback
68 TRACE: callee: adding _root.script_call callback
68 TRACE: caller: _root.script_call: function
68 TRACE: callee: finished initializing
2963 TRACE: callee: entering _root.script_call callback
2963 TRACE: callee: _root.script_call callback succeeded, expected
(Hello,World) got (Hello,World)
2963 TRACE: callee: _root.script_call callback finished

After 3 sec, you'd see that callback in _root is called instead of
ExternalInterface-registered one.

Test Flash/HTML file, source code, build scripts and full debug logs with
screenshots of both cases are attached (js2flash-rootcb.zip).


Gnash: 0.8.11dev (git 6b269f9 24-May-2015) NPAPI
Adobe Flash Player: 11.2 r202 (11.2.202.491) NPAPI binary
Browser: Iceweasel 10.0.12 (debian)
System: Debian GNU/Linux 7.0 Wheezy i386


(file #34574)
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Additional Item Attachment:

File name: js2flash-rootcb.zip            Size:7 KB


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