Initial commit

2026-07-14 11:11:36 +08:00
commit 656499cf94
604 changed files with 119518 additions and 0 deletions
@@ -0,0 +1,124 @@
+import 'package:flutter/foundation.dart';
+
+import '../../../core/contracts/playback.dart';
+import '../../../providers/subtitle_settings_provider.dart';
+
+enum InitialSubtitleSelectionType { unchanged, disabled, track }
+
+
+class InitialSubtitleSelection {
+  final InitialSubtitleSelectionType type;
+  final EmbySubtitleTrack? track;
+
+  const InitialSubtitleSelection._({required this.type, this.track});
+
+  static const unchanged = InitialSubtitleSelection._(
+    type: InitialSubtitleSelectionType.unchanged,
+  );
+
+  static const disabled = InitialSubtitleSelection._(
+    type: InitialSubtitleSelectionType.disabled,
+  );
+
+  const InitialSubtitleSelection.track(EmbySubtitleTrack selectedTrack)
+    : this._(type: InitialSubtitleSelectionType.track, track: selectedTrack);
+}
+
+
+InitialSubtitleSelection resolveInitialSubtitleSelection({
+  required List<EmbySubtitleTrack> subtitles,
+  required int? preferredSubtitleStreamIndex,
+  required int? defaultSubtitleStreamIndex,
+  required RememberedSubtitleTrack? rememberedSubtitle,
+}) {
+  if (preferredSubtitleStreamIndex != null &&
+      preferredSubtitleStreamIndex >= 0) {
+    return _selectionForStreamIndex(subtitles, preferredSubtitleStreamIndex);
+  }
+
+  if (rememberedSubtitle != null) {
+    if (rememberedSubtitle.isNone) {
+      return InitialSubtitleSelection.disabled;
+    }
+
+    final rememberedStreamIndex = matchRememberedSubtitle(
+      rememberedSubtitle,
+      subtitles,
+    );
+    if (rememberedStreamIndex != null) {
+      return _selectionForStreamIndex(subtitles, rememberedStreamIndex);
+    }
+  }
+
+  if (preferredSubtitleStreamIndex != null &&
+      preferredSubtitleStreamIndex < 0) {
+    return InitialSubtitleSelection.disabled;
+  }
+
+  if (defaultSubtitleStreamIndex != null && defaultSubtitleStreamIndex >= 0) {
+    return _selectionForStreamIndex(subtitles, defaultSubtitleStreamIndex);
+  }
+
+  if (defaultSubtitleStreamIndex == -1) {
+    return InitialSubtitleSelection.disabled;
+  }
+
+  return InitialSubtitleSelection.unchanged;
+}
+
+InitialSubtitleSelection _selectionForStreamIndex(
+  List<EmbySubtitleTrack> subtitles,
+  int streamIndex,
+) {
+  final selectedTrack = subtitles
+      .where((subtitle) => subtitle.index == streamIndex)
+      .firstOrNull;
+  return selectedTrack == null
+      ? InitialSubtitleSelection.unchanged
+      : InitialSubtitleSelection.track(selectedTrack);
+}
+
+
+@visibleForTesting
+int? matchRememberedSubtitle(
+  RememberedSubtitleTrack remembered,
+  List<EmbySubtitleTrack> subtitles,
+) {
+  if (subtitles.isEmpty) return null;
+
+  final wantedLanguage = remembered.language?.toLowerCase();
+  final wantedTitle = remembered.title?.toLowerCase();
+
+  if (wantedLanguage != null && wantedTitle != null) {
+    for (final subtitle in subtitles) {
+      if (subtitle.language?.toLowerCase() == wantedLanguage &&
+          subtitle.title?.toLowerCase() == wantedTitle) {
+        return subtitle.index;
+      }
+    }
+  }
+
+  if (wantedTitle != null) {
+    for (final subtitle in subtitles) {
+      if (subtitle.title?.toLowerCase() == wantedTitle) {
+        return subtitle.index;
+      }
+    }
+  }
+
+  if (wantedLanguage != null) {
+    for (final subtitle in subtitles) {
+      if (subtitle.language?.toLowerCase() == wantedLanguage) {
+        return subtitle.index;
+      }
+    }
+  }
+
+  for (final subtitle in subtitles) {
+    if (subtitle.index == remembered.streamIndex) {
+      return subtitle.index;
+    }
+  }
+
+  return null;
+}