Let launcher modify window corner radius

Test: Manualy launch an app
Test: Press home when activity is on top of the stack
Test: Quick scrub
Test: Swipe up on the home button, swipe down
Test: Tap on notification on the shade
Test: atest ActivityLaunchAnimatorTest
Bug: 111514493
Change-Id: Ib7e29e7e07bf2a245ff949373af700b319e273fc

2 files changed, 51 insertions, 0 deletions

diff --git a/core/java/com/android/internal/policy/PhoneWindow.java b/core/java/com/android/internal/policy/PhoneWindow.java
index 031377ebe27b..488b9912ee49 100644
--- a/core/java/com/android/internal/policy/PhoneWindow.java
+++ b/core/java/com/android/internal/policy/PhoneWindow.java
@@ -41,6 +41,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.content.res.Resources.Theme;
 import android.content.res.TypedArray;
 import android.graphics.Color;
diff --git a/core/java/com/android/internal/policy/ScreenDecorationsUtils.java b/core/java/com/android/internal/policy/ScreenDecorationsUtils.java
new file mode 100644
index 000000000000..100c6ee6763b
--- /dev/null
+++ b/core/java/com/android/internal/policy/ScreenDecorationsUtils.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2018 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.internal.policy;
+
+import com.android.internal.R;
+
+import android.content.res.Resources;
+
+/**
+ * Utility functions for screen decorations used by both window manager and System UI.
+ */
+public class ScreenDecorationsUtils {
+
+    /**
+     * Corner radius that should be used on windows in order to cover the display.
+     * These values are expressed in pixels because they should not respect display or font
+     * scaling, this means that we don't have to reload them on config changes.
+     */
+    public static float getWindowCornerRadius(Resources resources) {
+        // Radius that should be used in case top or bottom aren't defined.
+        float defaultRadius = resources.getDimension(R.dimen.rounded_corner_radius);
+
+        float topRadius = resources.getDimension(R.dimen.rounded_corner_radius_top);
+        if (topRadius == 0) {
+            topRadius = defaultRadius;
+        }
+        float bottomRadius = resources.getDimension(R.dimen.rounded_corner_radius_bottom);
+        if (bottomRadius == 0) {
+            bottomRadius = defaultRadius;
+        }
+
+        // Always use the smallest radius to make sure the rounded corners will
+        // completely cover the display.
+        return Math.min(topRadius, bottomRadius);
+    }
+}