1 files changed, 19 insertions, 0 deletions
diff --git a/app/src/main/java/org/terst/feedreader/data/Settings.kt b/app/src/main/java/org/terst/feedreader/data/Settings.kt
index 2e7eaae..be3e809 100644
--- a/app/src/main/java/org/terst/feedreader/data/Settings.kt
+++ b/app/src/main/java/org/terst/feedreader/data/Settings.kt
@@ -28,8 +28,16 @@ private object SettingsKeys {
     val LAST_FETCH_AT = longPreferencesKey("last_fetch_at")
     val LAST_FETCH_NEW_ARTICLES = intPreferencesKey("last_fetch_new_articles")
     val LAST_ACKNOWLEDGED_FETCH_AT = longPreferencesKey("last_acknowledged_fetch_at")
+    val READER_FONT_SIZE_PX = intPreferencesKey("reader_font_size_px")
 }
 
+// Matches the size ReaderWebView hardcoded before this setting existed, so an upgrading
+// user's reader looks exactly the same until they deliberately change it.
+const val DEFAULT_READER_FONT_SIZE_PX = 18
+private const val READER_FONT_SIZE_MIN_PX = 14
+private const val READER_FONT_SIZE_MAX_PX = 28
+val READER_FONT_SIZE_RANGE_PX = READER_FONT_SIZE_MIN_PX..READER_FONT_SIZE_MAX_PX
+
 /** Stash connection settings, configured on the Settings screen. Both blank until set. */
 class Settings(private val context: Context) {
     val stashBaseUrl: Flow<String> =
@@ -109,4 +117,15 @@ class Settings(private val context: Context) {
     suspend fun acknowledgeFetch(at: Long) {
         context.settingsDataStore.edit { prefs -> prefs[SettingsKeys.LAST_ACKNOWLEDGED_FETCH_AT] = at }
     }
+
+    val readerFontSizePx: Flow<Int> =
+        context.settingsDataStore.data.map { it[SettingsKeys.READER_FONT_SIZE_PX] ?: DEFAULT_READER_FONT_SIZE_PX }
+
+    suspend fun readerFontSizePxNow(): Int = readerFontSizePx.first()
+
+    suspend fun setReaderFontSizePx(px: Int) {
+        context.settingsDataStore.edit { prefs ->
+            prefs[SettingsKeys.READER_FONT_SIZE_PX] = px.coerceIn(READER_FONT_SIZE_RANGE_PX.first, READER_FONT_SIZE_RANGE_PX.last)
+        }
+    }
 }