Adding compat calls for building with UB

Bug: 143965596
Test: Build and verify on ub branch that pip animation still works
Change-Id: I1da328e74403c3d834b41bc12f4c2fcf1f1c3afb

packages/SystemUI/shared/src/com/android/systemui/shared/pip/PipSurfaceTransactionHelper.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.shared.pip;
+
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.view.SurfaceControl;
+
+/**
+ * TODO(b/171721389): unify this class with
+ * {@link com.android.wm.shell.pip.PipSurfaceTransactionHelper}, for instance, there should be one
+ * source of truth on enabling/disabling and the actual value of corner radius.
+ */
+public class PipSurfaceTransactionHelper {
+    private final Matrix mTmpTransform = new Matrix();
+    private final float[] mTmpFloat9 = new float[9];
+    private final RectF mTmpSourceRectF = new RectF();
+    private final Rect mTmpDestinationRect = new Rect();
+
+    public void scaleAndCrop(SurfaceControl.Transaction tx, SurfaceControl leash,
+            Rect sourceBounds, Rect destinationBounds, Rect insets) {
+        mTmpSourceRectF.set(sourceBounds);
+        mTmpDestinationRect.set(sourceBounds);
+        mTmpDestinationRect.inset(insets);
+        // Scale by the shortest edge and offset such that the top/left of the scaled inset
+        // source rect aligns with the top/left of the destination bounds
+        final float scale = sourceBounds.width() <= sourceBounds.height()
+                ? (float) destinationBounds.width() / sourceBounds.width()
+                : (float) destinationBounds.height() / sourceBounds.height();
+        final float left = destinationBounds.left - insets.left * scale;
+        final float top = destinationBounds.top - insets.top * scale;
+        mTmpTransform.setScale(scale, scale);
+        tx.setMatrix(leash, mTmpTransform, mTmpFloat9)
+                .setWindowCrop(leash, mTmpDestinationRect)
+                .setPosition(leash, left, top);
+    }
+
+    public void reset(SurfaceControl.Transaction tx, SurfaceControl leash, Rect destinationBounds) {
+        resetScale(tx, leash, destinationBounds);
+        resetCornerRadius(tx, leash);
+        crop(tx, leash, destinationBounds);
+    }
+
+    public void resetScale(SurfaceControl.Transaction tx, SurfaceControl leash,
+            Rect destinationBounds) {
+        tx.setMatrix(leash, Matrix.IDENTITY_MATRIX, mTmpFloat9)
+                .setPosition(leash, destinationBounds.left, destinationBounds.top);
+    }
+
+    public void resetCornerRadius(SurfaceControl.Transaction tx, SurfaceControl leash) {
+        tx.setCornerRadius(leash, 0);
+    }
+
+    public void crop(SurfaceControl.Transaction tx, SurfaceControl leash,
+            Rect destinationBounds) {
+        tx.setWindowCrop(leash, destinationBounds.width(), destinationBounds.height())
+                .setPosition(leash, destinationBounds.left, destinationBounds.top);
+    }
+}

packages/SystemUI/shared/src/com/android/systemui/shared/system/TaskInfoCompat.java

@@ -17,8 +17,11 @@
 package com.android.systemui.shared.system;
 
 import android.app.ActivityManager;
+import android.app.PictureInPictureParams;
 import android.app.TaskInfo;
 import android.content.ComponentName;
+import android.content.pm.ActivityInfo;
+import android.graphics.Rect;
 
 public class TaskInfoCompat {
 
@@ -34,6 +37,10 @@ public class TaskInfoCompat {
         return info.configuration.windowConfiguration.getWindowingMode();
     }
 
+    public static Rect getWindowConfigurationBounds(TaskInfo info) {
+        return info.configuration.windowConfiguration.getBounds();
+    }
+
     public static boolean supportsSplitScreenMultiWindow(TaskInfo info) {
         return info.supportsSplitScreenMultiWindow;
     }
@@ -45,4 +52,16 @@ public class TaskInfoCompat {
     public static ActivityManager.TaskDescription getTaskDescription(TaskInfo info) {
         return info.taskDescription;
     }
+
+    public static ActivityInfo getTopActivityInfo(TaskInfo info) {
+        return info.topActivityInfo;
+    }
+
+    public static boolean isAutoEnterPipEnabled(PictureInPictureParams params) {
+        return params.isAutoEnterEnabled();
+    }
+
+    public static Rect getPipSourceRectHint(PictureInPictureParams params) {
+        return params.getSourceRectHint();
+    }
 }