Setting for subtitle margin & fix subtitle opacity settings (#338)

Adds a subtitle style option to set the margin below unstyled subtitles.
This is roughly the percent of the screen below the subtitles. It
applies to both ExoPlayer & MPV.

Also fixes font & background opacity not being applied in some cases.

Fixes #225
Closes #178

app/src/main/java/com/github/damontecres/wholphin/preferences/AppPreferencesSerializer.kt

@@ -152,4 +152,5 @@ fun SubtitlePreferences.Builder.resetSubtitles() {
     backgroundColor = SubtitleSettings.BackgroundColor.defaultValue.toArgb()
     backgroundOpacity = SubtitleSettings.BackgroundOpacity.defaultValue.toInt()
     backgroundStyle = SubtitleSettings.BackgroundStylePref.defaultValue
+    margin = SubtitleSettings.Margin.defaultValue.toInt()
 }

app/src/main/java/com/github/damontecres/wholphin/services/AppUpgradeHandler.kt

@@ -10,7 +10,9 @@ import com.github.damontecres.wholphin.preferences.AppPreference
 import com.github.damontecres.wholphin.preferences.AppPreferences
 import com.github.damontecres.wholphin.preferences.updateInterfacePreferences
 import com.github.damontecres.wholphin.preferences.updatePlaybackOverrides
+import com.github.damontecres.wholphin.preferences.updateSubtitlePreferences
 import com.github.damontecres.wholphin.ui.preferences.PreferencesViewModel
+import com.github.damontecres.wholphin.ui.preferences.subtitle.SubtitleSettings
 import com.github.damontecres.wholphin.util.Version
 import dagger.hilt.android.qualifiers.ApplicationContext
 import timber.log.Timber
@@ -97,7 +99,7 @@ suspend fun upgradeApp(
     current: Version,
     appPreferences: DataStore<AppPreferences>,
 ) {
-    if (previous.isEqualOrBefore(Version.Companion.fromString("0.1.0-2-g0"))) {
+    if (previous.isEqualOrBefore(Version.fromString("0.1.0-2-g0"))) {
         appPreferences.updateData {
             it.updatePlaybackOverrides {
                 ac3Supported = AppPreference.Ac3Supported.defaultValue
@@ -107,21 +109,28 @@ suspend fun upgradeApp(
             }
         }
     }
-    if (previous.isEqualOrBefore(Version.Companion.fromString("0.2.3-6-g0"))) {
+    if (previous.isEqualOrBefore(Version.fromString("0.2.3-6-g0"))) {
         appPreferences.updateData {
             it.updateInterfacePreferences {
                 navDrawerSwitchOnFocus = AppPreference.NavDrawerSwitchOnFocus.defaultValue
             }
         }
     }
-    if (previous.isEqualOrBefore(Version.Companion.fromString("0.2.5-11-g0"))) {
+    if (previous.isEqualOrBefore(Version.fromString("0.2.5-11-g0"))) {
         appPreferences.updateData {
             it.updateInterfacePreferences {
                 showClock = AppPreference.ShowClock.defaultValue
             }
         }
     }
-    if (previous.isEqualOrBefore(Version.Companion.fromString("0.2.7-1-g0"))) {
+    if (previous.isEqualOrBefore(Version.fromString("0.2.7-1-g0"))) {
         PreferencesViewModel.resetSubtitleSettings(appPreferences)
     }
+    if (previous.isEqualOrBefore(Version.fromString("0.3.2-4-g0"))) {
+        appPreferences.updateData {
+            it.updateSubtitlePreferences {
+                margin = SubtitleSettings.Margin.defaultValue.toInt()
+            }
+        }
+    }
 }

app/src/main/java/com/github/damontecres/wholphin/ui/playback/PlaybackPage.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.RectangleShape
 import androidx.compose.ui.input.key.onKeyEvent
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.intl.Locale
@@ -117,6 +118,7 @@ fun PlaybackPage(
         LoadingState.Success -> {
             val prefs = preferences.appPreferences.playbackPreferences
             val scope = rememberCoroutineScope()
+            val configuration = LocalConfiguration.current
             val density = LocalDensity.current
 
             val player = viewModel.player
@@ -142,11 +144,11 @@ fun PlaybackPage(
             val subtitleSearchLanguage by viewModel.subtitleSearchLanguage.observeAsState(Locale.current.language)
 
             var playbackDialog by remember { mutableStateOf<PlaybackDialogType?>(null) }
-
             OneTimeLaunchedEffect {
                 if (prefs.playerBackend == PlayerBackend.MPV) {
                     scope.launch(Dispatchers.Main + ExceptionHandler()) {
                         preferences.appPreferences.interfacePreferences.subtitlesPreferences.applyToMpv(
+                            configuration,
                             density,
                         )
                     }
@@ -322,6 +324,7 @@ fun PlaybackPage(
                                     preferences.appPreferences.interfacePreferences.subtitlesPreferences.let {
                                         setStyle(it.toSubtitleStyle())
                                         setFixedTextSize(Dimension.SP, it.fontSize.toFloat())
+                                        setBottomPaddingFraction(it.margin.toFloat() / 100f)
                                     }
                                 }
                             },

app/src/main/java/com/github/damontecres/wholphin/ui/preferences/PreferencesContent.kt

@@ -69,6 +69,7 @@ fun PreferencesContent(
     modifier: Modifier = Modifier,
     viewModel: PreferencesViewModel = hiltViewModel(),
     updateVM: UpdateViewModel = hiltViewModel(),
+    onFocus: (Int, Int) -> Unit = { _, _ -> },
 ) {
     val context = LocalContext.current
     val scope = rememberCoroutineScope()
@@ -216,6 +217,7 @@ fun PreferencesContent(
                             if (focused) {
                                 focusedIndex = Pair(groupIndex, prefIndex)
                                 if (movementSounds) playOnClickSound(context)
+                                onFocus.invoke(groupIndex, prefIndex)
                             }
                         }
                         when (pref) {

app/src/main/java/com/github/damontecres/wholphin/ui/preferences/subtitle/SubtitleSettings.kt

@@ -1,10 +1,12 @@
 package com.github.damontecres.wholphin.ui.preferences.subtitle
 
+import android.content.res.Configuration
 import android.graphics.Typeface
 import androidx.annotation.OptIn
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.media3.common.util.UnstableApi
 import androidx.media3.ui.CaptionStyleCompat
@@ -21,6 +23,7 @@ import com.github.damontecres.wholphin.ui.indexOfFirstOrNull
 import com.github.damontecres.wholphin.ui.preferences.PreferenceGroup
 import com.github.damontecres.wholphin.util.mpv.MPVLib
 import com.github.damontecres.wholphin.util.mpv.setPropertyColor
+import timber.log.Timber
 
 object SubtitleSettings {
     val FontSize =
@@ -183,6 +186,23 @@ object SubtitleSettings {
             valueToIndex = { it.number },
         )
 
+    val Margin =
+        AppSliderPreference(
+            title = R.string.subtitle_margin,
+            defaultValue = 8,
+            min = 0,
+            max = 100,
+            interval = 1,
+            getter = {
+                it.interfacePreferences.subtitlesPreferences.margin
+                    .toLong()
+            },
+            setter = { prefs, value ->
+                prefs.updateSubtitlePreferences { margin = value.toInt() }
+            },
+            summarizer = { value -> value?.let { "$it%" } },
+        )
+
     val Reset =
         AppClickablePreference(
             title = R.string.reset,
@@ -223,16 +243,23 @@ object SubtitleSettings {
             PreferenceGroup(
                 title = R.string.more,
                 preferences =
-                    listOf(Reset),
+                    listOf(
+                        Margin,
+                        Reset,
+                    ),
             ),
         )
 
+    private fun combine(
+        color: Int,
+        opacity: Int,
+    ) = ((opacity / 100.0 * 255).toInt().shl(24)).or(color.and(0x00FFFFFF))
+
     @OptIn(UnstableApi::class)
     fun SubtitlePreferences.toSubtitleStyle(): CaptionStyleCompat {
-        val fo = (fontOpacity / 100.0 * 255).toInt().shl(24)
+        val bg = combine(backgroundColor, backgroundOpacity)
-        val bg = (backgroundOpacity / 100.0 * 255).toInt().shl(24).or(backgroundColor)
         return CaptionStyleCompat(
-            fo.or(fontColor),
+            combine(fontColor, fontOpacity),
             if (backgroundStyle == BackgroundStyle.BG_WRAP)bg else 0,
             if (backgroundStyle == BackgroundStyle.BG_BOXED) bg else 0,
             when (edgeStyle) {
@@ -240,7 +267,7 @@ object SubtitleSettings {
                 EdgeStyle.EDGE_SOLID -> CaptionStyleCompat.EDGE_TYPE_OUTLINE
                 EdgeStyle.EDGE_SHADOW -> CaptionStyleCompat.EDGE_TYPE_DROP_SHADOW
             },
-            fo.or(edgeColor),
+            combine(edgeColor, fontOpacity),
             when {
                 fontBold && fontItalic -> Typeface.defaultFromStyle(Typeface.BOLD_ITALIC)
                 fontBold -> Typeface.defaultFromStyle(Typeface.BOLD)
@@ -250,11 +277,14 @@ object SubtitleSettings {
         )
     }
 
-    fun SubtitlePreferences.applyToMpv(density: Density) {
+    fun SubtitlePreferences.applyToMpv(
+        configuration: Configuration,
+        density: Density,
+    ) {
         val fo = (fontOpacity / 100.0 * 255).toInt().shl(24)
-        val fc = Color(fo.or(fontColor))
+        val fc = Color(combine(fontColor, fontOpacity))
-        val bg = Color((backgroundOpacity / 100.0 * 255).toInt().shl(24).or(backgroundColor))
+        val bg = Color(combine(backgroundColor, backgroundOpacity))
-        val edge = Color(fo.or(edgeColor))
+        val edge = Color(combine(edgeColor, fontOpacity))
 
         // TODO weird, but seems to get the size to be very close to matching sizes between renderers
         val fontSizePx = with(density) { fontSize.sp.toPx() * .8 }.toInt()
@@ -262,6 +292,11 @@ object SubtitleSettings {
         MPVLib.setPropertyColor("sub-color", fc)
         MPVLib.setPropertyColor("sub-outline-color", edge)
 
+        val heightInPx = with(density) { configuration.screenHeightDp.dp.toPx() }
+        val margin = (heightInPx * (margin.toFloat() / 100f) * .8).toInt()
+        MPVLib.setPropertyInt("sub-margin-y", margin)
+        Timber.d("MPV subtitles: fontSizePx=%s, margin=$margin", fontSizePx, margin)
+
         when (edgeStyle) {
             EdgeStyle.EDGE_NONE,
             EdgeStyle.UNRECOGNIZED,

app/src/main/java/com/github/damontecres/wholphin/ui/preferences/subtitle/SubtitleStylePage.kt

@@ -33,7 +33,6 @@ import com.github.damontecres.wholphin.ui.preferences.PreferenceScreenOption
 import com.github.damontecres.wholphin.ui.preferences.PreferencesContent
 import com.github.damontecres.wholphin.ui.preferences.PreferencesViewModel
 import com.github.damontecres.wholphin.ui.preferences.subtitle.SubtitleSettings.toSubtitleStyle
-import timber.log.Timber
 
 @OptIn(UnstableApi::class)
 @Composable
@@ -48,8 +47,9 @@ fun SubtitleStylePage(
             preferences = it
         }
     }
-    Timber.v("SubtitleStylePage")
     val prefs = preferences.interfacePreferences.subtitlesPreferences
+    var focusedOnMargin by remember { mutableStateOf(false) }
+
     Row(
         modifier = modifier,
     ) {
@@ -68,6 +68,7 @@ fun SubtitleStylePage(
                     Modifier
                         .fillMaxSize(),
             )
+            if (!focusedOnMargin) {
                 Column(
                     verticalArrangement = Arrangement.SpaceBetween,
                     modifier =
@@ -103,10 +104,38 @@ fun SubtitleStylePage(
                         )
                     }
                 }
+            } else {
+                // Margin
+                AndroidView(
+                    factory = { context ->
+                        SubtitleView(context)
+                    },
+                    update = {
+                        it.setStyle(prefs.toSubtitleStyle())
+                        it.setFixedTextSize(Dimension.SP, prefs.fontSize.toFloat())
+                        it.setCues(
+                            listOf(
+                                Cue.Builder().setText("Subtitles margin below here").build(),
+                            ),
+                        )
+                        it.setBottomPaddingFraction(prefs.margin.toFloat() / 100f)
+                    },
+                    modifier =
+                        Modifier
+                            .fillMaxSize(),
+                )
+            }
         }
         PreferencesContent(
             initialPreferences = preferences,
             preferenceScreenOption = PreferenceScreenOption.SUBTITLES,
+            onFocus = { groupIndex, prefIndex ->
+
+                focusedOnMargin =
+                    SubtitleSettings.preferences.getOrNull(groupIndex)?.preferences?.getOrNull(
+                        prefIndex,
+                    ) == SubtitleSettings.Margin
+            },
             modifier =
                 Modifier
                     .fillMaxHeight()

app/src/main/proto/WholphinDataStore.proto

@@ -119,6 +119,7 @@ message SubtitlePreferences{
   BackgroundStyle background_style = 8;
   bool font_bold = 9;
   bool font_italic = 10;
+  int32 margin = 11;
 }
 
 message InterfacePreferences {

app/src/main/res/values/strings.xml

@@ -326,6 +326,7 @@
     <string name="remove">Remove</string>
     <string name="dolby_vision">Dolby Vision</string>
     <string name="dolby_atmos">Dolby Atmos</string>
+    <string name="subtitle_margin">Margin</string>
 
     <string-array name="theme_song_volume">
         <item>Disabled</item>