Hello,
To elaborate a bit more on this, it's a small IDL change to make the
CaptureController interface derive from the EventTarget interface:
https://github.com/w3c/mediacapture-screen-share/issues/268
https://docs.google.com/presentation/d/1lti3-GFsJ1iU2pXFjfSzeK8xyKj6Ohng9D6HndPNPLc/edit#slide=id.g2547a9cc7f2_1_15
The main use case is to implement CapturedMouseEvent, but that extra
inheritance cannot be controlled by a runtime flag.
https://groups.google.com/a/chromium.org/g/blink-dev/c/DYb5fXICJvo
This change was discussed in today's WebRTC WG meeting (with other
potential use cases mentioned) and approved, with PR pending to be merged:
https://docs.google.com/presentation/d/1lti3-GFsJ1iU2pXFjfSzeK8xyKj6Ohng9D6HndPNPLc/edit#slide=id.g2547a9cc7f2_1_15
https://github.com/w3c/mediacapture-screen-share/pull/269
https://github.com/w3c/mediacapture-screen-share/issues/268
In general Web developers from the Screen Capture CG are supportive of
this and interested in related future applications. Some members of
Mozilla and Apple were also present in W3C meetings where this was
discussed and they OK'ed the change. However, since I didn't open a
Mozilla/Apple position to get official stance for such a small feature,
I left "No Signal".
Chromium's CL is
https://chromium-review.googlesource.com/c/chromium/src/+/4542243/12
Thanks,
On 27/06/2023 19:19, Frédéric Wang wrote:
Contact emails
fw...@chromium.org
Explainer
None
Specification
https://w3c.github.io/mediacapture-screen-share/#dom-capturecontroller
Summary
The CaptureController interface enables further manipulation of a
screen capture session. In the future, it is expected that the events
related to a capture session are dispatched on that controller. To be
able to manage listeners for such events, the EventTarget methods are
made available on CaptureController.
Blink component
Blink>GetDisplayMedia
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink>GetDisplayMedia>
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
/Gecko/: No signal
/WebKit/: No signal
/Web developers/: Positive
(https://github.com/screen-share/mouse-events/issues/1)
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
Debuggability
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Yes
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
Flag name on chrome://flags
Finch feature name
Non-finch justification
Small IDL change that don't affect existing use cases of
CaptureController.
Requires code in //chrome?
False
Estimated milestones
Shipping on desktop 117
Shipping on Android 117
Shipping on WebView 117
Shipping on WebView 117
Anticipated spec changes
Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github
issues in the project for the feature specification) whose resolution
may introduce web compat/interop risk (e.g., changing to naming or
structure of the API in a non-backward-compatible way).
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5139210809376768
Links to previous Intent discussions
This intent message was generated by Chrome Platform Status
<https://chromestatus.com>.
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Frédéric Wang
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