Introduce VideoComponentFactory as the component override mechanism - #1778
Introduce VideoComponentFactory as the component override mechanism#1778andremion wants to merge 1 commit into
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WalkthroughThe PR adds ChangesComponent factory API
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to The change preserves default rendering behavior, but five intentionally empty customization methods currently trigger static-analysis findings; adding explanatory comments is a small follow-up before merge. Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant StreamCallActivityComposeDelegate
participant VideoTheme
participant CallContent
participant DemoComponentFactory
participant ParticipantVideo
StreamCallActivityComposeDelegate->>VideoTheme: provide componentFactory
VideoTheme->>CallContent: expose componentFactory
CallContent->>DemoComponentFactory: request call and participant content
DemoComponentFactory->>ParticipantVideo: render customized reactions and actions
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Full details: Description checkExplanation The description covers the goal, implementation, compatibility impact, scope decisions, UI impact, and testing results. It is complete and directly related to the pull request, although the repository checklist and GIF sections are not included. ✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
📝 Generate docstrings
🧪 Generate unit tests (beta)
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Inline comments:
In
`@stream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/theme/VideoComponentFactory.kt`:
- Around line 175-177: Add explanatory nested comments to the intentionally
empty bodies of CallContentVideoOverlayContent, CallContentClosedCaptions,
CallContentVideoModerationBlur, ColumnScope.IncomingCallHeaderContent, and
ColumnScope.OutgoingCallHeaderContent, documenting that each is an opt-in
extension point and resolving the empty-body findings without changing their
behavior.
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📒 Files selected for processing (16)
demo-app/src/main/kotlin/io/getstream/video/android/CallActivity.ktdemo-app/src/main/kotlin/io/getstream/video/android/ui/call/CallScreen.ktdemo-app/src/main/kotlin/io/getstream/video/android/ui/call/DemoComponentFactory.ktstream-video-android-ui-compose/api/stream-video-android-ui-compose.apistream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/theme/CompoundComponentFactory.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/theme/VideoComponentFactory.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/theme/VideoComponentFactoryParams.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/theme/VideoTheme.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/StreamCallActivityComposeDelegate.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/CallAppBar.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/activecall/CallContent.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/lobby/CallLobby.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/renderer/ParticipantVideo.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/ringing/RingingCallContent.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/ringing/incomingcall/IncomingCallContent.ktstream-video-android-ui-compose/src/main/kotlin/io/getstream/video/android/compose/ui/components/call/ringing/outgoingcall/OutgoingCallContent.kt
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Add VideoComponentFactory, a public interface with default implementations for the components behind the existing lambda slots on CallContent, ParticipantVideo, ControlActions, CallLobby, CallAppBar and the ringing screens. Each method takes a single params holder class, following the ChatComponentFactory convention from the chat SDK. The factory is provided through VideoTheme(componentFactory) and exposed via VideoTheme.componentFactory. CompoundComponentFactory allows layering overrides per subtree, and StreamCallActivityComposeDelegate exposes an overridable componentFactory used by the screens it renders. All existing lambda slots keep their signatures and now delegate to the factory by default, so the change is source compatible and the snapshot suite is unchanged. The new VideoTheme parameter does change its JVM signature, so consumers need a recompile against this version. The demo app shows a sample override: DemoComponentFactory replaces the inline reaction and participant-action lambdas in CallScreen and is also installed on the activity delegate.
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| content: @Composable () -> Unit, | ||
| ) { | ||
| val currentComponentFactory = LocalComponentFactory.current | ||
| val compoundComponentFactory = remember(currentComponentFactory, *keys) { |
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factory isn't in the key list, so a factory lambda that captures a composable parameter is remembered past the change: currentComponentFactory never changes, keys is empty by default, and the anonymous object keeps whatever it captured on first composition.
Adding factory as a key closes that without giving up memoisation: the Compose compiler memoises a non-composable lambda argument on its captures, so the instance stays stable across recompositions and changes exactly when a capture does.
For reference, the chat equivalent keys on the keys array itself (remember(keys) { ... }), so its memoisation hangs on that array's identity rather than on the factory. This version already tightened that by keying on currentComponentFactory and spreading keys — factory is the one key still missing.
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| @Test | ||
| fun `factory incoming call content in dark mode`() { |
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Non-blocking: this golden is byte-identical to factory incoming call content (both md5 6ef5603c…), and the outgoing pair below is the same story (7a6788e0…). Both pairs also match the existing CallContentTest_… with minimum parameters goldens.
Across the commit, 8 of the 14 new PNGs duplicate another image byte-for-byte. The null-branch coverage these previews add is real, but a pixel assertion can't see it — worth dropping the redundant ones or saying in the comment what they actually pin.
| * @param call The call that contains all the participants state and tracks. | ||
| * @param title The title shown in the app bar. When `null`, the default title is used. | ||
| */ | ||
| public data class CallAppBarCenterContentParams( |
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Non-blocking: title is nullable and documented as "when null, the default title is used", but no SDK path can pass null — CallAppBar's own title defaults to a non-null stringResource and forwards it, and the factory's CallAppBar already resolves params.title ?: stringResource(...) before calling it. Could be non-null, dropping one of the two fallbacks.
2 participants
Goal
Resolves AND-762.
Introduce
VideoComponentFactoryas the single component override mechanism for the Compose Video SDK, mirroringChatComponentFactoryfrom the Chat SDK so the customization model is the same across both products. Today customization is spread across per-composable lambda slots, the style layer and the activity delegate; the factory gives one place to override components globally.Stacked on #1776 (AND-1417). The base will be retargeted to
developafter that PR merges, so only the last commit is relevant for review.Implementation
VideoComponentFactory: a public interface with 29@Composablemethods, each with a default implementation that renders the built-in component. It covers the components behind the existing lambda slots onCallContent,ParticipantVideo,ControlActions,CallLobby,CallAppBarand the ringing screens.VideoComponentFactoryParams.kt: one params holder class per method (29), so methods can grow without breaking overrides. This follows the chat convention, including the params classes from day one (chat had to retrofit them in AND-1119).CompoundComponentFactory: layers overrides on top of the current factory for a subtree. Note: chat's version usesremember(keys), which treats the vararg array as a single identity-compared key. This PR usesremember(currentComponentFactory, *keys)instead; the same fix probably applies to the chat SDK.componentFactoryparameter onVideoTheme, a publicLocalComponentFactory, and aVideoTheme.componentFactoryaccessor.StreamCallActivityComposeDelegateexposes an overridablecomponentFactoryused by the screens it renders. Screen-level overrides stay on the delegate, component-level overrides live in the factory.DemoComponentFactoryreplaces the inline reaction and participant-action lambdas thatCallScreenpassed in two places, and is installed on the demo activity delegate.Compatibility:
develop.VideoThemeparameter changes its JVM signature, so consumers need a recompile against this version. The rest of the api dump diff is additions only.Decisions that deviate from a literal 1:1 slot mapping:
CallAppBarleading/center/trailing slots are separate factory methods instead of nullable fields onCallAppBarParams, because a null field could not distinguish "hide" from "use the default".ParticipantLabel'ssoundIndicatorContentslot is not covered, because its two overloads have different default paddings, so one factory method could not serve both without a visual change.ControlActionsmethod on purpose, so overriding the in-call bar does not change the pre-join lobby bar.Out of scope, per the ticket ("Initial method coverage: the slots that already exist as lambdas"): internal render paths that never had lambda slots still call components directly, so a factory override of
ParticipantVideoapplies to the main grid but not inside the default floating self tile, the default picture-in-picture content or the screen share renderer, andAudioCallContenthas no factory methods yet. Tracked in the follow-up ticket AND-1441.🎨 UI Changes
No visual changes. This is a refactor of how the default slot content is resolved; the snapshot suite must stay identical and it does (no golden regenerated).
Testing
:stream-video-android-ui-compose:verifyPaparazziDebugpasses with no golden regenerated, which is the acceptance criterion for identical rendering of all default paths.apiDumpupdated andapiCheckpasses.DemoComponentFactorydrives the custom reaction and the Kick participant action through the factory instead of inline lambdas, on the grid tiles and now also on the floating self tile (Kick excludes the local participant).To test an override without the demo app, pass a factory to the theme:
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