1214583 - loadFramescript loads into things without messageManager

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, defect)

Description

[noitidart]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0
Build ID: 20151008162217

Steps to reproduce:

I attached a delayed framescript, and it seems to add into things that don't have a message manager.

Like for instance:
<iframe type="content" src="resource://nimbusscreencaptureff-at-everhelper-dot-me/nimbus-screen-capture/data/popup.html" flex="1" transparent="transparent" autocompleteenabled="true">

So it's not possible to communicate to that with aMsgEvent.target.messageManager.sendAsyncMessage

Comment 1

[Olli Pettay [:smaug][[e-mail]]]

I assume that iframe is somewhere in chrome.
You should be able to access its message manager using
             var owner = aMsgEvent.target.QueryInterface(Components.interfaces.nsIFrameLoaderOwner);
             if (owner.frameLoader) {
               return owner.frameLoader.messageManager
             }

Note, xul:browser just has a helper method for this.
http://mxr.mozilla.org/mozilla-central/source/toolkit/content/widgets/browser.xml#314

Comment 2

[noitidart]

Ah thanks Olli! Is this mentioned somewhere in docs, else where would it be best to update?

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

Well https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/browser does mention messageManager and
https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/iframe doesn't, so it is sort of documented.