Merge "Added shade bottom corner radius transition for predictive back" into udc-dev

packages/SystemUI/src/com/android/systemui/scrim/ScrimDrawable.java

@@ -203,7 +203,10 @@ public class ScrimDrawable extends Drawable {
     }
 
     public void setBottomEdgeRadius(float radius) {
+        if (mBottomEdgeRadius != radius) {
             mBottomEdgeRadius = radius;
+            invalidateSelf();
+        }
     }
 
     @Override

packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java

@@ -2206,6 +2206,7 @@ public final class NotificationPanelViewController implements ShadeSurface, Dump
         // TODO: non-linearly transform progress fraction into squish amount (ease-in, linear out)
         mCurrentBackProgress = progressFraction;
         applyBackScaling(progressFraction);
+        mQsController.setClippingBounds();
     }
 
     /** Resets back progress. */

packages/SystemUI/src/com/android/systemui/shade/QuickSettingsController.java

@@ -114,6 +114,8 @@ import javax.inject.Inject;
 public class QuickSettingsController implements Dumpable {
     public static final String TAG = "QuickSettingsController";
 
+    public static final int SHADE_BACK_ANIM_SCALE_MULTIPLIER = 100;
+
     private QS mQs;
     private final Lazy<NotificationPanelViewController> mPanelViewControllerLazy;
 
@@ -1128,7 +1130,7 @@ public class QuickSettingsController implements Dumpable {
      * Updates scrim bounds, QS clipping, notifications clipping and keyguard status view clipping
      * as well based on the bounds of the shade and QS state.
      */
-    private void setClippingBounds() {
+    void setClippingBounds() {
         float qsExpansionFraction = computeExpansionFraction();
         final int qsPanelBottomY = calculateBottomPosition(qsExpansionFraction);
         // Split shade has no QQS
@@ -1216,7 +1218,10 @@ public class QuickSettingsController implements Dumpable {
                             ? 0 : mScreenCornerRadius;
             radius = (int) MathUtils.lerp(screenCornerRadius, mScrimCornerRadius,
                     Math.min(top / (float) mScrimCornerRadius, 1f));
-            mScrimController.setNotificationBottomRadius(radius);
+
+            float bottomRadius = mExpanded ? screenCornerRadius :
+                    calculateBottomCornerRadius(screenCornerRadius);
+            mScrimController.setNotificationBottomRadius(bottomRadius);
         }
         if (isQsFragmentCreated()) {
             float qsTranslation = 0;
@@ -1279,6 +1284,28 @@ public class QuickSettingsController implements Dumpable {
                 nsslLeft, nsslTop, nsslRight, nsslBottom, topRadius, bottomRadius);
     }
 
+    /**
+     * Bottom corner radius should follow screen corner radius unless
+     * predictive back is running. We want a smooth transition from screen
+     * corner radius to scrim corner radius as the notification scrim is scaled down,
+     * but the transition should be brief enough to accommodate very short back gestures.
+     */
+    @VisibleForTesting
+    int calculateBottomCornerRadius(float screenCornerRadius) {
+        return (int) MathUtils.lerp(screenCornerRadius, mScrimCornerRadius,
+                Math.min(calculateBottomRadiusProgress(), 1f));
+    }
+
+    @VisibleForTesting
+    float calculateBottomRadiusProgress() {
+        return (1 - mScrimController.getBackScaling()) * SHADE_BACK_ANIM_SCALE_MULTIPLIER;
+    }
+
+    @VisibleForTesting
+    int getScrimCornerRadius() {
+        return mScrimCornerRadius;
+    }
+
     void setDisplayInsets(int leftInset, int rightInset) {
         mDisplayLeftInset = leftInset;
         mDisplayRightInset = rightInset;

packages/SystemUI/src/com/android/systemui/statusbar/phone/ScrimController.java

@@ -602,6 +602,10 @@ public class ScrimController implements ViewTreeObserver.OnPreDrawListener, Dump
         mNotificationsScrim.setScaleY(scale);
     }
 
+    public float getBackScaling() {
+        return mNotificationsScrim.getScaleY();
+    }
+
     public void onTrackingStarted() {
         mDarkenWhileDragging = !mKeyguardStateController.canDismissLockScreen();
         if (!mKeyguardUnlockAnimationController.isPlayingCannedUnlockAnimation()) {

packages/SystemUI/tests/src/com/android/systemui/shade/QuickSettingsControllerTest.java

@@ -580,6 +580,30 @@ public class QuickSettingsControllerTest extends SysuiTestCase {
         verify(mQs).setQsVisible(true);
     }
 
+    @Test
+    public void calculateBottomCornerRadius_scrimScaleMax() {
+        when(mScrimController.getBackScaling()).thenReturn(1.0f);
+        assertThat(mQsController.calculateBottomCornerRadius(0.0f)).isEqualTo(0);
+    }
+
+    @Test
+    public void calculateBottomCornerRadius_scrimScaleMin() {
+        when(mScrimController.getBackScaling())
+                .thenReturn(mNotificationPanelViewController.SHADE_BACK_ANIM_MIN_SCALE);
+        assertThat(mQsController.calculateBottomCornerRadius(0.0f))
+                .isEqualTo(mQsController.getScrimCornerRadius());
+    }
+
+    @Test
+    public void calculateBottomCornerRadius_scrimScaleCutoff() {
+        float ratio = 1 / mQsController.calculateBottomRadiusProgress();
+        float cutoffScale = 1 - mNotificationPanelViewController.SHADE_BACK_ANIM_MIN_SCALE / ratio;
+        when(mScrimController.getBackScaling())
+                .thenReturn(cutoffScale);
+        assertThat(mQsController.calculateBottomCornerRadius(0.0f))
+                .isEqualTo(mQsController.getScrimCornerRadius());
+    }
+
     private void lockScreen() {
         mQsController.setBarState(KEYGUARD);
     }