LGTM2
On 2/24/23 5:52 AM, Yoav Weiss wrote:
LGTM1
On Thu, Feb 23, 2023 at 3:13 PM 'François Beaufort' via blink-dev
<[email protected]> wrote:
Contact emails
[email protected] <mailto:[email protected]>
Explainer
https://github.com/WICG/capability-delegation#allowing-display-capture-from-cross-origin-iframe-click
<https://github.com/WICG/capability-delegation#allowing-display-capture-from-cross-origin-iframe-click>
Specification
https://wicg.github.io/capability-delegation/spec.html#monkey-patch-to-screen-capture
<https://wicg.github.io/capability-delegation/spec.html#monkey-patch-to-screen-capture>
https://github.com/WICG/capability-delegation/pull/32
<https://github.com/WICG/capability-delegation/pull/32>
Summary
This feature is based on the general delegation mechanism
(https://chromestatus.com/feature/5708770829139968) shipped on M100.
Display-Capture Capability Delegation allows a Window to transfer
the ability to call navigator.mediaDevices.getDisplayMedia() to
another Window it trusts after relinquishing the transient user
activation at the sender Window.
Blink component
Blink>GetDisplayMedia
TAG review
Covered by the review for the general delegation mechanism:
https://github.com/w3ctag/design-reviews/issues/655
<https://github.com/w3ctag/design-reviews/issues/655>
Risks
Interoperability and Compatibility risks remain unchanged from the
general delegation mechanism; see:
https://groups.google.com/a/chromium.org/g/blink-dev/c/PHT_2X7oRBE/m/gR9UiZxBAQAJ
External signals
Gecko: Positive
(https://github.com/mozilla/standards-positions/issues/565
<https://github.com/mozilla/standards-positions/issues/565>
WebKit: No signal
(https://github.com/WebKit/standards-positions/issues/137
<https://github.com/WebKit/standards-positions/issues/137>)
Web developers: Positive
(https://github.com/w3c/mediacapture-screen-share/issues/258
<https://github.com/w3c/mediacapture-screen-share/issues/258>)
Debuggability
This remains unchanged from the general intent:
https://groups.google.com/a/chromium.org/g/blink-dev/c/PHT_2X7oRBE/m/gR9UiZxBAQAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/PHT_2X7oRBE/m/gR9UiZxBAQAJ>
Ongoing technical constraints
None.
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
No - Supported on all Desktop platforms.
Is this feature fully tested by web-platform-tests?
Yes.
Flag name
--enable-blink-features=CapabilityDelegationDisplayCaptureRequest
Requires code in //chrome?
No.
Tracking bug
https://crbug.com/1412770 <https://crbug.com/1412770>
Estimated milestone
113
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5147589575442432
<https://chromestatus.com/feature/5147589575442432>
Links to previous Intent discussions
Intent for the general delegation mechanism with Payment Request:
https://groups.google.com/a/chromium.org/g/blink-dev/c/PHT_2X7oRBE/m/gR9UiZxBAQAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/PHT_2X7oRBE/m/gR9UiZxBAQAJ>
Intent for the general delegation mechanism with Fullscreen Request:
https://groups.google.com/a/chromium.org/g/blink-dev/c/7YkubntWi3Y/m/tyB2H5a0AwAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/7YkubntWi3Y/m/tyB2H5a0AwAJ>
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