feat(playback): add independent subtitle text opacity and a gray color option - #413
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…r option White subtitle text against a dark background is uncomfortably bright on an OLED or HDR display. The subtitle appearance settings had no way to dim the text itself: backgroundOpacity only affects the box behind it, and the font color palette had no gray option. Adds a textOpacity field (1-100, default 100) alongside the existing backgroundOpacity, applied to the text color independently of the background, plus a gray swatch in the font color palette, on both phone and TV. Both opacity controls moved from a slider to a typed percent field (phone) or a D-pad picker (TV, matching the existing paradigm) after a slider proved too imprecise to hit low values. Also re-vendors the settings contract at manifest revision 13 and fixes a found bug where the percent field committed on every keystroke instead of on blur, which could leave the displayed value out of sync with what was saved. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change adds subtitle text opacity to shared settings, Android subtitle controls, caption rendering, and server compatibility handling. It also updates settings keys, manifest definitions, and conformance fixtures. ChangesSubtitle Text Opacity
Settings Keys and Manifest
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant SubtitleSettingsControl
participant SubtitleSettingsViewModel
participant AndroidPlayerSettingsStore
participant SettingsContractRevision
participant ServerSettingsFlusher
participant SettingsApi
SubtitleSettingsControl->>SubtitleSettingsViewModel: submit appearance transform
SubtitleSettingsViewModel->>AndroidPlayerSettingsStore: updateSubtitleAppearance(transform)
AndroidPlayerSettingsStore->>SettingsContractRevision: refresh active server revision
AndroidPlayerSettingsStore->>ServerSettingsFlusher: flush subtitle appearance
ServerSettingsFlusher->>SettingsContractRevision: resolve server revision
ServerSettingsFlusher->>SettingsApi: PUT revision-shaped appearance
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The subtitle-opacity changes preserve off-step TV values and concurrent appearance edits, while retaining unsent edits during server refresh. The change is mergeable subject to normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The inspected changes retain existing profile/device permissions and accommodate older servers. A bounded consistency risk remains if a local save fails after its server update has been queued. No new privileged access or broader data exposure was identified in the inspected paths. Retained concerns
Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 31.46% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 89 functions across 27 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches 💡 1🧪 Generate unit tests (beta)
🛠️ Fix failing CI checks 💡
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Review comments at
@androidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/ui/screens/player/TvSubtitleAppearanceOptions.kt:
- Line 53: Update the TV subtitle opacity options used by both the HUD and
Settings pickers to include the current saved opacity when it is not already in
the list, following the existing `delayPicker` pattern. Ensure each picker has a
matching option for the selected value so opening it preserves that value until
the user chooses another.
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android-shared/src/androidMain/kotlin/org/siloserver/silo/common/player/SubtitleManager.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/settings/DeviceCaptioningAppearance.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/SubtitleStyleSheet.ktandroidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/ui/screens/player/TvPlayerHud.ktandroidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/ui/screens/player/TvSubtitleAppearanceOptions.ktandroidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/ui/screens/settings/TvSettingsScreen.ktandroidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/ui/screens/settings/TvSettingsViewModel.ktshared/src/commonMain/kotlin/org/siloserver/silo/model/settings/PlaybackSettingsKeys.ktshared/src/commonMain/kotlin/org/siloserver/silo/model/settings/SettingKeys.ktshared/src/commonMain/kotlin/org/siloserver/silo/model/settings/SubtitleAppearance.ktshared/src/commonMain/kotlin/org/siloserver/silo/model/settings/SubtitleAppearanceProjection.ktshared/src/commonTest/kotlin/org/siloserver/silo/model/settings/SubtitleAppearanceProjectionTest.ktshared/src/commonTest/resources/settings/v1/SOURCEshared/src/commonTest/resources/settings/v1/conformance.jsonshared/src/commonTest/resources/settings/v1/manifest.json
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Addressing the review feedback: CodeRabbit — TV opacity pickers omit the current value when it's off the discrete step cadence. Confirmed: a value set via the phone's free-typed percent field (e.g. 67%) had no matching option in either the HUD or Settings TV picker, so opening it focused the first step and pressing Select would silently overwrite the real value. Fixed with a Kody — closing the subtitle sheet while the opacity field is still focused can lose a typed-but-uncommitted value. Confirmed: dismissing the sheet tears down the composable without firing Rebuilt |
The TV background/text opacity pickers only listed their fixed step values (0/25/50/75/100 or every 5), so a value set via the phone's free-typed percent field could have no matching option. Opening the picker then selected the first step, and pressing Select silently overwrote the real value. Fixed with a shared helper that unions the step list with the current value, matching the existing delayPicker pattern. Also commits a pending opacity edit when the subtitle sheet is dismissed while the field is still focused, since that tears the composable down without firing onFocusChanged(false). Found by CodeRabbit and Kody review on PR Silo-Server#413. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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textOpacity was added to playback.subtitle_appearance's schema at manifest revision 13, but the key itself has been servable since revision 1 — a server between those (or one this session hasn't confirmed yet) has a schema validator that rejects the whole write for the one unknown member, failing every subtitle-appearance edit rather than just the new field. PlayerSettings now caches the manifest revision from each batched effective-values read and omits textOpacity from the wire payload below revision 13. The chosen value still applies locally. Also fixes the same off-cadence opacity picker issue found on the Android companion PR (Silo-Server/silo-android#413) at all four tvOS/macOS discrete pickers, commits a pending PercentField edit on view teardown (the number pad has no Done key), and merges upstream/main to resolve a conflict from Silo-Server#546 with the slider this PR already replaced. Found by CodeRabbit and Kody review on PR Silo-Server#539. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
…snapshot Every control in the phone subtitle-style sheet built its update as appearance.copy(field = value) against a composable-captured appearance snapshot, then wrote the whole object back. Two edits that both go through that snapshot in the same composition pass — most reachably, the two opacity fields committing independently as the sheet is dismissed, since the sheet can tear down both PercentInputRows before either write round-trips back into the read appearance would race: whichever write lands first can be clobbered by the second, which was still building its new value from the appearance the sheet had before the first write applied. SubtitleStyleSheet's onUpdate now takes a transform, not a precomputed value, and PlayerViewModel/SettingsViewModel apply it against the freshest value read from the store immediately before writing — the same pattern TvSettingsViewModel.editAppearance already used for the identical reason. Found by Kody review on PR Silo-Server#413, after the previous commit's fix for lost edits on sheet dismissal made this reachable. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Kody (high) — the two opacity rows' dispose-commits can race and clobber each other. Confirmed: both Fixed by switching Rebuilt |
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Inline comments:
Review comments at
@androidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/PlayerViewModel.kt:
- Around line 4290-4291: Update the appearance-transform flows to use an atomic
store update instead of reading from the flow and writing a complete object, so
concurrent edits to different fields are preserved. In
androidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/PlayerViewModel.kt,
lines 4290-4291, pass the transform directly to the store’s atomic update; in
androidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/settings/SettingsViewModel.kt,
lines 515-516, use the same update before flushing the projection.
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androidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/PlayerOverlay.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/PlayerViewModel.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/player/SubtitleStyleSheet.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/settings/SettingsScreen.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/settings/SettingsViewModel.kt
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Reading subtitleAppearanceFlow.first() and then writing the transformed
result back separately narrowed the race the previous commit targeted, but
didn't close it: two concurrent callers (e.g. both opacity fields committing
as the sheet is dismissed, each in its own launched coroutine) could still
both read the same value before either write landed, and the second write
would discard the first edit.
Adds PlayerSettingsStore.updateSubtitleAppearance(transform), which reads
the current appearance from DataStore's own preferences snapshot inside the
same edit {} transaction that writes the result. DataStore serializes edit
calls against each other, so this is an actual fix rather than a smaller
window: no other write can land between the read and the write. The
interface keeps a default (read-then-write) implementation for test fakes
that only need to capture a value, not real atomicity.
PlayerViewModel, SettingsViewModel, and TvSettingsViewModel.editAppearance
(which had the identical read-then-write pattern, predating this feature)
all move to the atomic method.
Found by Kody (critical) and CodeRabbit (major) review on PR Silo-Server#413, after the
previous commit's snapshot-based fix made the race reachable but not closed.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Kody (critical) and CodeRabbit (major) — the previous fix narrowed the race but didn't close it. Right: reading Fixed properly this time: added Rebuilt and retested |
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The server moved subtitle textOpacity to revision 14 because revision 13 went to the advisory_age overlay id. Re-vendor manifest.json and conformance.json from the server and regenerate SettingKeys. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The server schema for playback.subtitle_appearance only accepts textOpacity from manifest revision 14 and rejects unknown properties. A server below 14 answers a write that carries it with a contract error, the flusher drops the op, and the next refresh reverts every subtitle edit in that write. The flusher now decides at send time: it strips textOpacity for a server known to be below 14, sends it whole from 14, and holds the write (kept queued and retried) while the revision is unknown, so a value queued before the probe answers neither fails on an old server nor resets the stored value on a new one. The revision comes from a shared SettingsContractRevision cache that refreshFromServer re-reads before it pushes. The phone style sheet, TV HUD, and TV settings hide the Text Opacity control when the server is known to be below 14. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
updateSubtitleAppearance applied its transform inside the DataStore edit but enqueued the result after the edit returned. The flusher keeps the last value enqueued per key, so two concurrent edits that committed A then B could enqueue B then A, and the server kept the older composite. The enqueue now runs inside the transaction, in updateSubtitleAppearance, flushProjectedSubtitleAppearance, and the override-enable path, so the queued value is always the one the latest commit wrote. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Pressing Done in the Text Opacity or Background Opacity field committed the value but left the field focused and the keyboard open over the sheet. Done now commits, clears focus, and hides the keyboard. Commit on blur stays, and the row skips the repeat commit that clearing focus triggers. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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The capabilities request goes to whichever server is active when it is sent. A server switch during the fetch cached the new server's revision under the old URL, so the flusher could strip textOpacity for a server that stores it, or send it to one that rejects it. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
1% reads as no subtitles. The HUD now offers 25-100% and Settings 5-100%, matching the tvOS app; a stored value between steps is still offered. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Thanks for this. I pushed maintainer follow-ups to your branch: merged main, re-vendored the contract at revision 14 (the server's revision 13 went to another change), and made the flusher leave |
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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…r option (#539) * feat(playback): add independent subtitle text opacity and a gray color option White subtitle text against a dark background is uncomfortably bright on an OLED or HDR display. The subtitle appearance settings had no way to dim the text itself: backgroundOpacity only affects the box behind it, and the font color palette had no gray option. Adds a textOpacity field (1-100, default 100) alongside the existing backgroundOpacity, applied to the text color independently of the background, plus a gray swatch in the font color palette, across iOS, tvOS, and macOS. Both opacity controls moved from a slider to a typed percent field (iOS/macOS) or a D-pad picker (tvOS, matching the existing paradigm) after a slider proved too imprecise to hit low values; the new PercentField is now a single shared component instead of two copies that had already drifted. Also re-vendors the settings contract at manifest revision 13 (adding the missing per-key revision entries this exposed), extends the low-legibility warning to fire on near-zero text opacity, and fixes two contract tests that assumed every revision introduces a new key, which does not hold for a schema-only widening like this one. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(playback): hold back textOpacity from servers that don't know it yet textOpacity was added to playback.subtitle_appearance's schema at manifest revision 13, but the key itself has been servable since revision 1 — a server between those (or one this session hasn't confirmed yet) has a schema validator that rejects the whole write for the one unknown member, failing every subtitle-appearance edit rather than just the new field. PlayerSettings now caches the manifest revision from each batched effective-values read and omits textOpacity from the wire payload below revision 13. The chosen value still applies locally. Also fixes the same off-cadence opacity picker issue found on the Android companion PR (Silo-Server/silo-android#413) at all four tvOS/macOS discrete pickers, commits a pending PercentField edit on view teardown (the number pad has no Done key), and merges upstream/main to resolve a conflict from #546 with the slider this PR already replaced. Found by CodeRabbit and Kody review on PR #539. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(playback): clear the known manifest revision on every refresh knownManifestRevision lives on PlayerSettings.shared, which survives server and profile switches. A revision confirmed for the previous scope stayed cached if the new scope's refresh failed or hadn't completed, so a subtitle appearance edit right after switching to an older server could still send textOpacity and get the whole write rejected — exactly the failure the previous commit meant to prevent, just from a different angle. Clearing the cached revision at the top of refreshFromServer(), before anything else runs, means a failed or pending refresh always falls back to the conservative "unknown" gate. Found independently by CodeRabbit and Kody review on PR #539. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore(settings): re-vendor the settings contract at revision 14 The server moved subtitle textOpacity from manifest revision 13 to 14, because revision 13 went to the advisory_age overlay id. Copy manifest.json and conformance.json byte-for-byte from the server commit that made the move, regenerate the Swift bindings from it, and point SOURCE at that commit. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(playback): decide textOpacity at send time, from revision 14 A server below manifest revision 14 rejects any subtitle_appearance write that contains textOpacity, then the next refresh reverts the whole appearance. The client stripped the member at enqueue time against a gate of 13, so a revision-13 server still received it. Stripping at enqueue also lost data: refreshFromServer clears the known revision before it reads, so an edit made during that read queued a stripped object that replaced the stored one on a current server. The flusher now records the revision from each effective-values read and decides at send time. It strips members the server's revision predates and holds a subtitle_appearance write while the revision is unknown. A refresh flushes the held write once its read succeeds. The one-time legacy import goes through the same path and compares its value as the server would store it. The gated members and their revisions live in SettingKeyRevisions.swift, and a conformance test ties them to the vendored manifest's notes. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(tvos): offer 25-100% text opacity in the player HUD The HUD built its text opacity options with a 25-point stride starting at 1, which yields 1, 26, 51 and 76. Once the value changed, 100% could not be picked again, and 1% (invisible text) was offered. Text opacity now offers 25, 50, 75 and 100. Background opacity keeps Off through 100. Both pickers still add the current value when another client stored one between the steps. The HUD and tvOS Settings pickers now share one helper for the option values, with a unit test. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(playback): hide text opacity on servers older than revision 14 A server below manifest revision 14 never receives textOpacity, so a value picked there only lasts until the next refresh. Hide the control on the iOS and macOS subtitle settings screen, the in-player settings sheet, tvOS subtitle settings and the tvOS player HUD when the server is known to predate it. While the revision is unknown, the control stays visible. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(ui): make the percent field commit once, with a Done key - iOS: the number pad has no return key, so add a keyboard toolbar Done button that commits and ends editing. - Commit only a draft the user typed. onSubmit, focus loss and onDisappear can all fire for one edit. The later calls no longer repeat the write or put a stale draft back over a value synced in the meantime. - A synced value replaces the draft unless the user is mid-edit. - macOS: accept surrounding whitespace and a trailing "%". Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(playback): keep the settings revision across a failed refresh A refresh cleared the known manifest revision before reading it again, so one refresh that failed offline held every later subtitle appearance write until the next successful read. The revision is now forgotten only when the server, profile or device changes. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * chore(settings): point the vendored contract at its merged server commit Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * fix(playback): keep a settings revision only for the scope that read it A refresh awaits a flush and a read, and the read goes to whichever server, profile and device are active when it is sent. If the scope changed in between, the revision was recorded for the old scope, and returning to it reused the other server's revision. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Kamil Gielas <kamilgielas@MacBook-Pro-Kamil.local> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com> Co-authored-by: Quick104 <31828688+Quick104@users.noreply.github.com>
2 participants
Problem
Related issue: Silo-Server/silo-server#369
Validation tasks: changes #323 C1; changes #324 C1
White subtitle text is uncomfortably bright on an OLED or HDR TV in a dark room, and there was no way to dim it:
backgroundOpacityonly affects the box behind the text, and the color list had no gray. Silo-Server/silo-server#369 asked for a gray default for this reason.This adds
textOpacity(1–100, default 100) toSubtitleAppearance, applied to the caption text color independently of the background, and a gray swatch, on phone and TV. It needs Silo-Server/silo-server#1652, which adds the field to the settings contract at manifest revision 14.Approach
textOpacityfollows the same clamp asbackgroundOpacity, but floors at 1: fully invisible text is not a state the picker should offer.SubtitleManager.buildCaptionStyle()applies it as the foreground color's alpha.A server below revision 14 rejects a subtitle appearance that includes
textOpacity, and a rejected write is dropped and then reverted by the next refresh. So the flusher decides at send time: below 14 it sends the appearance withouttextOpacity; while the server's revision is not known yet it holds that write and sends it once the revision is read. On a server known to be older, the Text Opacity control is hidden. The server's revision is cached per server URL and re-read on each settings refresh.Subtitle appearance edits are now queued for sync inside the same DataStore transaction that applies them, so two quick edits reach the server in the order they were made.
On phone, both opacity controls are typed percent fields instead of sliders; a slider is too coarse at the low end. Done commits the value and closes the keyboard. TV keeps its D-pad pickers, which include a stored value that falls between the standard steps.
Re-vendors the settings contract fixtures at revision 14.
Validation
:shared:testDebugUnitTest,:android-shared:testDebugUnitTest, and the phone and TV app unit tests: pass (1447, 1611, 694 and 1159 tests), including new tests for the revision gate, holding a write until the revision is known, edit ordering and the caption alpha:androidApp:assembleDebugand:androidTvApp:assembleDebug: passtextOpacity, with no rejected writeRisks
AI Disclosure
/code-review(high effort) and fixed a percent field that committed on every keystroke, a missing clamp test and a duplicated alpha formula. A maintainer review with claude-opus-5-5 found thattextOpacitywas sent to servers that reject it, dropping the whole appearance write, and that concurrent edits could reach the server out of order; both are fixed here and were re-checked against revision 13 and revision 14 servers.🤖 Generated with Claude Code
Note
Add independent subtitle text opacity and gray color option in playback
Registers one shared
SettingsContractRevisioninstance in PlayerInfraModule.kt, built fromSettingsApicapability probes and the activeTokenManagerserver URL. Injects it intoDefaultServerSettingsFlusherandAndroidPlayerSettingsStoreso settings capability state is shared across the settings store, settings UI, and server flusher.Macroscope summarized 2f76d5f.