Merge "Ensured that all players have the same size" into rvc-dev am: 96c2a56a06

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12018784

Change-Id: Idd7d79a2d8a0085138713b66ead5535e07b05ea7

packages/SystemUI/src/com/android/systemui/media/MediaCarouselController.kt

@@ -299,6 +299,7 @@ class MediaCarouselController @Inject constructor(
         if (numPages == 1) {
             pageIndicator.setLocation(0f)
         }
+        updatePageIndicatorAlpha()
     }
 
     /**

packages/SystemUI/src/com/android/systemui/media/MediaHost.kt

@@ -1,6 +1,5 @@
 package com.android.systemui.media
 
-import android.graphics.PointF
 import android.graphics.Rect
 import android.util.ArraySet
 import android.view.View
@@ -101,7 +100,7 @@ class MediaHost @Inject constructor(
                 }
                 // This will trigger a state change that ensures that we now have a state available
                 state.measurementInput = input
-                return mediaHostStatesManager.getPlayerDimensions(state)
+                return mediaHostStatesManager.updateCarouselDimensions(location, state)
             }
         }
 

packages/SystemUI/src/com/android/systemui/media/MediaHostStatesManager.kt

@@ -31,6 +31,12 @@ class MediaHostStatesManager @Inject constructor() {
     private val callbacks: MutableSet<Callback> = mutableSetOf()
     private val controllers: MutableSet<MediaViewController> = mutableSetOf()
 
+    /**
+     * The overall sizes of the carousel. This is needed to make sure all players in the carousel
+     * have equal size.
+     */
+    val carouselSizes: MutableMap<Int, MeasurementOutput> = mutableMapOf()
+
     /**
      * A map with all media states of all locations.
      */
@@ -45,6 +51,7 @@ class MediaHostStatesManager @Inject constructor() {
         if (!hostState.equals(currentState)) {
             val newState = hostState.copy()
             mediaHostStates.put(location, newState)
+            updateCarouselDimensions(location, hostState)
             // First update all the controllers to ensure they get the chance to measure
             for (controller in controllers) {
                 controller.stateCallback.onHostStateChanged(location, newState)
@@ -61,7 +68,10 @@ class MediaHostStatesManager @Inject constructor() {
      * Get the dimensions of all players combined, which determines the overall height of the
      * media carousel and the media hosts.
      */
-    fun getPlayerDimensions(hostState: MediaHostState): MeasurementOutput {
+    fun updateCarouselDimensions(
+        @MediaLocation location: Int,
+        hostState: MediaHostState
+    ): MeasurementOutput {
         val result = MeasurementOutput(0, 0)
         for (controller in controllers) {
             val measurement = controller.getMeasurementsForState(hostState)
@@ -74,6 +84,7 @@ class MediaHostStatesManager @Inject constructor() {
                 }
             }
         }
+        carouselSizes[location] = result
         return result
     }
 

packages/SystemUI/src/com/android/systemui/media/MediaViewController.kt

@@ -78,6 +78,16 @@ class MediaViewController @Inject constructor(
      */
     private val tmpState = TransitionViewState()
 
+    /**
+     * A temporary state used to store intermediate measurements.
+     */
+    private val tmpState2 = TransitionViewState()
+
+    /**
+     * A temporary state used to store intermediate measurements.
+     */
+    private val tmpState3 = TransitionViewState()
+
     /**
      * A temporary cache key to be used to look up cache entries
      */
@@ -304,8 +314,8 @@ class MediaViewController @Inject constructor(
         // Obtain the view state that we'd want to be at the end
         // The view might not be bound yet or has never been measured and in that case will be
         // reset once the state is fully available
-        val endViewState = obtainViewState(endHostState) ?: return
-
+        var endViewState = obtainViewState(endHostState) ?: return
+        endViewState = updateViewStateToCarouselSize(endViewState, endLocation, tmpState2)!!
         layoutController.setMeasureState(endViewState)
 
         // If the view isn't bound, we can drop the animation, otherwise we'll execute it
@@ -315,7 +325,8 @@ class MediaViewController @Inject constructor(
         }
 
         val result: TransitionViewState
-        val startViewState = obtainViewState(startHostState)
+        var startViewState = obtainViewState(startHostState)
+        startViewState = updateViewStateToCarouselSize(startViewState, startLocation, tmpState3)
 
         if (!endHostState.visible) {
             // Let's handle the case where the end is gone first. In this case we take the
@@ -350,6 +361,22 @@ class MediaViewController @Inject constructor(
                 animationDelay)
     }
 
+    private fun updateViewStateToCarouselSize(
+        viewState: TransitionViewState?,
+        location: Int,
+        outState: TransitionViewState
+    ) : TransitionViewState? {
+        val result = viewState?.copy(outState) ?: return null
+        val overrideSize = mediaHostStatesManager.carouselSizes[location]
+        overrideSize?.let {
+            // To be safe we're using a maximum here. The override size should always be set
+            // properly though.
+            result.height = Math.max(it.measuredHeight, result.height)
+            result.width = Math.max(it.measuredWidth, result.width)
+        }
+        return result
+    }
+
     /**
      * Retrieves the [TransitionViewState] and [MediaHostState] of a [@MediaLocation].
      * In the event of [location] not being visible, [locationWhenHidden] will be used instead.