183638 - Plugin can't be notified when the parent window gets activated again

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect, P3)

Description

[Xiaobin Lu]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Build Identifier: 20021204

Current plugin has no way to know when the parent window get activated. An 
example will be a Java applet has a text field and the user is clicking it to 
get the focus. When the user is using ALT+TAB key to switch to another window 
and when it switch back, the original focus to the textfield has been lost. For 
Active X control, Microsoft provide the interface IOleInPlaceObject, if the 
control implements it, the container will notify it when it gets actiavted 
again. Mozilla Plugin should have the same kind of stuff.

Reproducible: Always

Steps to Reproduce:
1. N/A
2.
3.

Comment 1

[av (gone)]

One of the ways to do that would be to extend NPP_HandleEvent to windowed
plugins. We currently pass focus event to the plugin, but only for windowless
plugins.

Comment 2

[av (gone)]

Also, does not the window get WM_FOCUS message?

Comment 3

[Peter Lubczynski]

How would the NPP_HandleEvent message differ from WM_KILLFOCUS? Could you achive
what you want by grabbing the browser's top level window through the API and
listening for activates?

Comment 4

[rubydoo123]

reassign

Comment 5

[BMO Automation]

Resolving as wont fix, plugin support deprecated in Firefox 85.