layout improvements

src-tauri/android/src/main/java/com/dtourolle/jellytau/VideoOverlayManager.kt

@@ -15,6 +15,8 @@ import com.dtourolle.jellytau.player.JellyTauPlayer
 object VideoOverlayManager {
 
     private var attachedSurfaceView: SurfaceView? = null
+    private var contentLayoutListener: android.view.View.OnLayoutChangeListener? = null
+    private var listenerContentView: ViewGroup? = null
 
     /**
      * Attach the video SurfaceView to the Activity's content view.
@@ -51,6 +53,23 @@ object VideoOverlayManager {
             contentView.addView(surfaceView, 0, layoutParams)
             attachedSurfaceView = surfaceView
 
+            // Re-fit the video whenever the content view's bounds change (e.g. on
+            // device rotation) so the video is letterboxed to fit instead of being
+            // stretched/cropped by the MATCH_PARENT surface.
+            removeLayoutListener()
+            val listener = android.view.View.OnLayoutChangeListener {
+                _, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
+                if (right - left != oldRight - oldLeft || bottom - top != oldBottom - oldTop) {
+                    player.fitSurfaceToScreen()
+                }
+            }
+            contentView.addOnLayoutChangeListener(listener)
+            contentLayoutListener = listener
+            listenerContentView = contentView
+
+            // Fit once now that the surface is attached and the parent is sized.
+            player.fitSurfaceToScreen()
+
             android.util.Log.d("VideoOverlayManager", "Video surface attached to view hierarchy")
         } catch (e: Exception) {
             android.util.Log.e("VideoOverlayManager", "Failed to attach video surface", e)
@@ -64,6 +83,7 @@ object VideoOverlayManager {
      */
     fun detachVideoSurface(activity: Activity) {
         try {
+            removeLayoutListener()
             attachedSurfaceView?.let { surfaceView ->
                 val contentView = activity.window.decorView.findViewById<ViewGroup>(android.R.id.content)
                 contentView.removeView(surfaceView)
@@ -83,4 +103,12 @@ object VideoOverlayManager {
     fun isVideoSurfaceAttached(): Boolean {
         return attachedSurfaceView != null
     }
+
+    private fun removeLayoutListener() {
+        contentLayoutListener?.let { listener ->
+            listenerContentView?.removeOnLayoutChangeListener(listener)
+        }
+        contentLayoutListener = null
+        listenerContentView = null
+    }
 }

src-tauri/android/src/main/java/com/dtourolle/jellytau/player/JellyTauPlayer.kt

@@ -161,6 +161,9 @@ class JellyTauPlayer(private val appContext: Context) {
     /** SurfaceView for video playback */
     private var surfaceView: SurfaceView? = null
     private var surfaceHolder: SurfaceHolder? = null
+    /** Last reported video frame size, used to fit the surface to the screen preserving aspect ratio */
+    private var videoWidth: Int = 0
+    private var videoHeight: Int = 0
     private var currentMediaType: MediaType = MediaType.AUDIO
     private var currentActivity: java.lang.ref.WeakReference<android.app.Activity>? = null
 
@@ -262,7 +265,11 @@ class JellyTauPlayer(private val appContext: Context) {
             }
 
             override fun onVideoSizeChanged(videoSize: androidx.media3.common.VideoSize) {
-                android.util.Log.d("JellyTauPlayer", "▶ Video size: ${videoSize.width}x${videoSize.height}")
+                android.util.Log.d("JellyTauPlayer", "▶ Video size: ${videoSize.width}x${videoSize.height} par=${videoSize.pixelWidthHeightRatio}")
+                // Apply pixel aspect ratio so anamorphic content isn't distorted
+                videoWidth = (videoSize.width * videoSize.pixelWidthHeightRatio).toInt()
+                videoHeight = videoSize.height
+                fitSurfaceToScreen()
             }
 
             override fun onRenderedFirstFrame() {
@@ -873,17 +880,62 @@ class JellyTauPlayer(private val appContext: Context) {
 
     /**
      * Resize the video surface (for orientation changes).
+     *
+     * Re-fits the surface to the screen preserving the video's aspect ratio so
+     * nothing is cropped when the device rotates.
      */
     fun resizeSurface(width: Int, height: Int) {
+        fitSurfaceToScreen()
+    }
+
+    /**
+     * Size the video SurfaceView so the video fits entirely inside its parent
+     * (the full-screen content view) while preserving aspect ratio (letterbox/
+     * pillarbox). A raw SurfaceView with MATCH_PARENT otherwise stretches the
+     * video to the surface bounds, which crops the bottom on rotation.
+     */
+    fun fitSurfaceToScreen() {
         mainHandler.post {
-            surfaceView?.let { view ->
-                view.layoutParams = view.layoutParams.apply {
-                    this.width = width
-                    this.height = height
-                }
-                view.requestLayout()
-                android.util.Log.d("JellyTauPlayer", "Video surface resized to ${width}x${height}")
+            val view = surfaceView ?: return@post
+            val parent = view.parent as? ViewGroup
+            // Available area: prefer the parent's measured size, fall back to the screen.
+            val availW = parent?.width?.takeIf { it > 0 }
+                ?: appContext.resources.displayMetrics.widthPixels
+            val availH = parent?.height?.takeIf { it > 0 }
+                ?: appContext.resources.displayMetrics.heightPixels
+
+            if (videoWidth <= 0 || videoHeight <= 0 || availW <= 0 || availH <= 0) {
+                return@post
             }
+
+            val videoAspect = videoWidth.toFloat() / videoHeight.toFloat()
+            val viewAspect = availW.toFloat() / availH.toFloat()
+
+            val targetW: Int
+            val targetH: Int
+            if (videoAspect > viewAspect) {
+                // Video is wider than the screen → fit width, letterbox top/bottom
+                targetW = availW
+                targetH = (availW / videoAspect).toInt()
+            } else {
+                // Video is taller than the screen → fit height, pillarbox sides
+                targetH = availH
+                targetW = (availH * videoAspect).toInt()
+            }
+
+            val lp = view.layoutParams
+            // FrameLayout child: center the fitted surface within the full-screen parent.
+            if (lp is FrameLayout.LayoutParams) {
+                lp.gravity = android.view.Gravity.CENTER
+            }
+            lp.width = targetW
+            lp.height = targetH
+            view.layoutParams = lp
+            view.requestLayout()
+            android.util.Log.d(
+                "JellyTauPlayer",
+                "Video surface fitted to ${targetW}x${targetH} (video ${videoWidth}x${videoHeight}, avail ${availW}x${availH})"
+            )
         }
     }