Closed Bug 659071 Opened 9 years ago Closed 7 years ago

Ctrl + scrollwheel doesn't zoom when hovering a <video> element


(Core :: User events and focus handling, defect)

Not set





(Reporter: dholbert, Assigned: masayuki)





(1 file)

 1. Load video w/ embedded <video>, e.g.
 2. Position cursor over page background.
 3. Ctrl-Scrollwheel
     --> Page zooms in/out
 4. Position cursor over <video> element
 4. Ctrl-Scrollwheel
     --> Page DOES NOT ZOOM
 5. Ctrl-+
     --> Page zooms in/out

ACTUAL RESULTS: Scrollwheel zoom is broken when cursor is above a <video>.

NOTE: Flash videos don't have this problem -- e.g. Ctrl-scrollwheel zooms just fine when I hover the video at (without experimental-html5-video-opt-in)
Summary: Ctrl + scrollwheel doesn't zoom when hovering a video → Ctrl + scrollwheel doesn't zoom when hovering a <video> element
Version info:
Mozilla/5.0 (X11; Linux x86_64; rv:6.0a1) Gecko/20110522 Firefox/6.0a1

This bug also reproduces when you're viewing a video directly, too -- e.g. I can repro it here:
The problem is here:

if (content &&
    !content->IsNodeOfType(nsINode::eHTML_FORM_CONTROL) &&

!content->IsXUL() returns false when content is a <audio> or <video> element
So it looks like the problem is the controls of the audio and video element. When they are visible and you try to zoom in using the scroll wheel over one of the elements, the controls become the "content" parameter I mentioned in comment 2. 

Not sure wht the best solution is. we could add a special condition to the if statement up there for media elements, or we could somehow get the event to ignore the controls and get the video frame as content
Shouldn't we check whether the document is XUL?
Yeah. I think that shouldn't be !content->IsXUL() but
Thanks, I'll fix this after bug 719320.
Component: Video/Audio → Event Handling
Depends on: 719320
Assignee: nobody → masayuki
Attached patch PatchSplinter Review
If the test is performed in the iframe of the harness, some tests after it will fail :-(
Attachment #651330 - Flags: review?(bugs)
Attachment #651330 - Flags: review?(bugs) → review+
OS: Linux → All
Hardware: x86_64 → All
Closed: 7 years ago
Resolution: --- → FIXED
Component: Event Handling → User events and focus handling
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