[Carousel] Update mask size when MaskableFrameLayout size is changed

Author: pubiqq

lib/java/com/google/android/material/carousel/MaskableFrameLayout.java

@@ -65,7 +65,7 @@ public MaskableFrameLayout(
   @Override
   protected void onSizeChanged(int w, int h, int oldw, int oldh) {
     super.onSizeChanged(w, h, oldw, oldh);
-    onMaskChanged();
+    updateMaskRect();
   }
 
   @Override
@@ -123,13 +123,17 @@ public void setMaskXPercentage(float percentage) {
     percentage = MathUtils.clamp(percentage, 0F, 1F);
     if (maskXPercentage != percentage) {
       this.maskXPercentage = percentage;
-      // Translate the percentage into an actual pixel value of how much of this view should be
-      // masked away.
-      float maskWidth = AnimationUtils.lerp(0f, getWidth() / 2F, 0f, 1f, maskXPercentage);
-      setMaskRectF(new RectF(maskWidth, 0F, (getWidth() - maskWidth), getHeight()));
+      updateMaskRect();
     }
   }
 
+  private void updateMaskRect() {
+    // Translate the percentage into an actual pixel value of how much of this view should be
+    // masked away.
+    float maskWidth = AnimationUtils.lerp(0f, getWidth() / 2F, 0f, 1f, maskXPercentage);
+    setMaskRectF(new RectF(maskWidth, 0F, (getWidth() - maskWidth), getHeight()));
+  }
+
   /**
    * Sets the {@link RectF} that this {@link View} will be masked by.
    *