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Shelley Vohr
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* chore: patch webrtc to keep the ScreenCast persist mode with the restore token Carries https://webrtc-review.googlesource.com/c/src/+/505860 until it rolls. RestoreTokenManager stores the portal persist mode next to each restore token and BaseCapturerPipeWire::Start() requests that mode when restoring, so a persistent token stays persistent. Existing callers default to transient and behave as before. * feat: allow restoring a desktopCapturer source across launches on Wayland On Wayland desktopCapturer.getSources() shows the xdg-desktop-portal picker on every call, so a screen-capture app has to ask the user again on every launch even though ScreenCast v4 can persist the grant. Add `persistMode` ('transient' | 'persistent') and `restoreToken` options to getSources(), a `restoreToken` property on the returned sources, and desktopCapturer.getRestoreToken(sourceId) to read the token again after it rotates when a stream starts. With a stored persistent token the picker is skipped; a revoked or stale token falls back to the picker. Electron does not store tokens; the docs show how an app can. Other platforms ignore the options and return an empty restoreToken. * docs: say when persistMode is needed with a token and add API history * chore: update the carried webrtc patch to the latest upstream revision The persist mode enum moved to modules/portal/screencast_persist_mode.h upstream, so use it from there instead of including screencast_portal.h. * docs: say how a restored window is matched and handle a cancelled picker GNOME and KDE save a window as its app id and title and restore the open window of that app with the closest title, so a token does not always bring back the window the user picked. The sample now denies the request when the user closes the picker. * docs: format the restore token sample * fix: forward restore tokens from xdg-desktop-portal 1.22.1 Only tokens that parse as a UUID were passed to the portal. Since 1.22.1 it issues 22 character base64 tokens, and accepts those and UUIDs, so every token from a new portal was dropped and the picker came back. Forward what the portal itself accepts. * chore: drop the webrtc patch that has rolled in https://webrtc-review.googlesource.com/c/src/+/505860 is part of the WebRTC that Chromium 157.0.8085.0 pins. * fix: only look up and seed restore tokens for picker sessions Also covers an empty source list and a second request in the docs sample, and adds a round-trip spec. * fix: pass restore tokens through unchecked and require persistMode with them The portal's token grammar changed once already (1.22.1) and copying it here silently dropped valid tokens, so the token now goes to the portal as given: a value it did not issue makes getSources() reject, which the docs and the sample handle. restoreToken without persistMode restored a persistent grant as transient and ended it, so that combination is now an invalid option.
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DesktopCapturerSource Object
idstring - The identifier of a window or screen that can be used as achromeMediaSourceIdconstraint when callingnavigator.getUserMedia. The format of the identifier will bewindow:XX:YYorscreen:ZZ:0. XX is the windowID/handle. YY is 1 for the current process, and 0 for all others. ZZ is a sequential number that represents the screen, and it does not equal to the index in the source's name.namestring - A screen source will be named eitherEntire ScreenorScreen <index>, while the name of a window source will match the window title.thumbnailNativeImage - A thumbnail image. Note: There is no guarantee that the size of the thumbnail is the same as thethumbnailSizespecified in theoptionspassed todesktopCapturer.getSources. The actual size depends on the scale of the screen or window.display_idstring - A unique identifier that will correspond to theidof the matching Display returned by the Screen API. On some platforms, this is equivalent to theXXportion of theidfield above and on others it will differ. It will be an empty string if not available.appIconNativeImage - An icon image of the application that owns the window or null if the source has a type screen. The size of the icon is not known in advance and depends on what the application provides.restoreTokenstring Linux Experimental - A token that lets a laterdesktopCapturer.getSourcescall reopen this source without showing the system picker, or an empty string if the system did not issue one. See Restoring a source on Wayland.