Introduce ViewRoot forwarding input/view events to native

ui/android/view_android_unittest.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/android/view_client.h"
+#include "ui/android/view_root.h"
+
+namespace ui {
+
+using base::android::JavaParamRef;
+
+class TestViewRoot : public ViewRoot {
+ public:
+  TestViewRoot() : ViewRoot(0L) {}
+
+  // Overrides |OnTouchEvent| to skip getting dip scale
+  // and UMA record update not necessary for this test).
+  jboolean OnTouchEvent(JNIEnv* env,
+                        const JavaParamRef<jobject>& obj,
+                        const JavaParamRef<jobject>& motion_event,
+                        jlong time_ms,
+                        jint android_action,
+                        jint pointer_count,
+                        jint history_size,
+                        jint action_index,
+                        jfloat pos_x_0,
+                        jfloat pos_y_0,
+                        jfloat pos_x_1,
+                        jfloat pos_y_1,
+                        jint pointer_id_0,
+                        jint pointer_id_1,
+                        jfloat touch_major_0,
+                        jfloat touch_major_1,
+                        jfloat touch_minor_0,
+                        jfloat touch_minor_1,
+                        jfloat orientation_0,
+                        jfloat orientation_1,
+                        jfloat tilt_0,
+                        jfloat tilt_1,
+                        jfloat raw_pos_x,
+                        jfloat raw_pos_y,
+                        jint android_tool_type_0,
+                        jint android_tool_type_1,
+                        jint android_button_state,
+                        jint android_meta_state,
+                        jboolean is_touch_handle_event) {
+
+    MotionEventAndroid::Pointer pointer0(pointer_id_0,
+                                         pos_x_0,
+                                         pos_y_0,
+                                         touch_major_0,
+                                         touch_minor_0,
+                                         orientation_0,
+                                         tilt_0,
+                                         android_tool_type_0);
+    MotionEventAndroid::Pointer pointer1(pointer_id_1,
+                                         pos_x_1,
+                                         pos_y_1,
+                                         touch_major_1,
+                                         touch_minor_1,
+                                         orientation_1,
+                                         tilt_1,
+                                         android_tool_type_1);
+    MotionEventAndroid event(1.f,
+                             env,
+                             motion_event,
+                             time_ms,
+                             android_action,
+                             pointer_count,
+                             history_size,
+                             action_index,
+                             android_button_state,
+                             android_meta_state,
+                             raw_pos_x - pos_x_0,
+                             raw_pos_y - pos_y_0,
+                             &pointer0,
+                             &pointer1);
+
+    return OnTouchEventInternal(event, is_touch_handle_event);
+  }
+};
+
+class TestViewClient : public ViewClient {
+ public:
+  TestViewClient() : handle_event_(true),
+                     called_(false) {}
+
+  bool OnTouchEvent(const MotionEventAndroid& event,
+                    bool is_touch_handle_event) override {
+    called_ = true;
+    return handle_event_;
+  }
+
+  void SetHandleEvent(bool handle_event) { handle_event_ = handle_event; }
+  bool EventHandled() { return handle_event_ && called_; }
+  void Reset() { called_ = false; }
+
+ private:
+  bool handle_event_;
+  bool called_;
+};
+
+class ViewAndroidBoundsTest : public testing::Test {
+ public:
+  ViewAndroidBoundsTest() : view1_(&client1_),
+                            view2_(&client2_),
+                            view3_(&client3_) {}
+  void Reset() {
+    client1_.Reset();
+    client2_.Reset();
+    client3_.Reset();
+  }
+
+  void GenerateTouchEventAt(float x, float y) {
+    root_.OnTouchEvent(nullptr,
+                       base::android::JavaParamRef<jobject>(nullptr),
+                       base::android::JavaParamRef<jobject>(nullptr),
+                       0L, // time
+                       0, 1, 0, 0,
+                       x, y, 0.f, 0.f, // pos
+                       0, 0,  // pointer_id
+                       0.f, 0.f, 0.f, 0.f,  // touch
+                       0.f, 0.f, 0.f, 0.f,
+                       0.f, 0.f,
+                       0, 0, 0, 0,
+                       false);
+  }
+
+  TestViewRoot root_;
+  TestViewClient client1_;
+  TestViewClient client2_;
+  TestViewClient client3_;
+  ViewAndroid view1_;
+  ViewAndroid view2_;
+  ViewAndroid view3_;
+};
+
+TEST_F(ViewAndroidBoundsTest, MatchesViewInFront) {
+  view1_.SetBounds(gfx::Point(50, 50), 400, 600);
+  view2_.SetBounds(gfx::Point(50, 50), 400, 600);
+  root_.AddChild(&view2_);
+  root_.AddChild(&view1_);
+
+  // root
+  //   +-------+
+  //   |       |
+  // view1_  view2_
+
+  GenerateTouchEventAt(100.f, 100.f);
+  EXPECT_TRUE(client1_.EventHandled());
+  EXPECT_FALSE(client2_.EventHandled());
+
+  Reset();
+
+  // View 2 moves up to front, and events should hit it from now.
+  root_.MoveToFront(&view2_);
+  GenerateTouchEventAt(100.f, 100.f);
+
+  EXPECT_FALSE(client1_.EventHandled());
+  EXPECT_TRUE(client2_.EventHandled());
+}
+
+TEST_F(ViewAndroidBoundsTest, MatchesViewArea) {
+  //  +----------------+
+  //  |  view2_        |
+  //  |                |
+  //  |   +--------+   |
+  //  |   | x      |   | -> (100, 100)
+  //  |   | view1_ |   |
+  //  |   |        |   |
+  //  |   +--------+   |
+  //  |             x  | -> (300, 400)
+  //  +----------------+
+  view1_.SetBounds(gfx::Point(50, 50), 200, 200);
+  view2_.SetBounds(gfx::Point(20, 20), 400, 600);
+
+  // root
+  //   +-------+
+  //   |       |
+  // view1_  view2_
+  root_.AddChild(&view2_);
+  root_.AddChild(&view1_);
+
+  // Falls within |view1_|'s bounds
+  GenerateTouchEventAt(100.f, 100.f);
+  EXPECT_TRUE(client1_.EventHandled());
+  EXPECT_FALSE(client2_.EventHandled());
+  Reset();
+
+  // Falls within |view2_|'s bounds
+  GenerateTouchEventAt(300.f, 400.f);
+  EXPECT_FALSE(client1_.EventHandled());
+  EXPECT_TRUE(client2_.EventHandled());
+}
+
+TEST_F(ViewAndroidBoundsTest, MatchesViewAfterMove) {
+  //  +----------------+
+  //  |  view2_        |
+  //  |                |
+  //  |   +--------+   |
+  //  |   | x      |   | -> (100, 100)
+  //  |   |        |   |
+  //  |   +--------+   |
+  //  |                |
+  //  +----------------+
+  view1_.SetBounds(gfx::Point(50, 50), 200, 200);
+  view2_.SetBounds(gfx::Point(20, 20), 400, 600);
+  root_.AddChild(&view2_);
+  root_.AddChild(&view1_);
+
+  GenerateTouchEventAt(100.f, 100.f);
+  EXPECT_TRUE(client1_.EventHandled());
+  EXPECT_FALSE(client2_.EventHandled());
+
+  Reset();
+
+  // The front view moved, so the same event now should hit the view below it.
+  //  +----------------+
+  //  |  view2_        |
+  //  |                |
+  //  |   x            | -> (100, 100)
+  //  |     +--------+ |
+  //  |     |        | |
+  //  |     |        | |
+  //  |     +--------+ |
+  //  +----------------+
+  view1_.SetBounds(gfx::Point(150, 150), 200, 200);
+  GenerateTouchEventAt(100.f, 100.f);
+  EXPECT_FALSE(client1_.EventHandled());
+  EXPECT_TRUE(client2_.EventHandled());
+}
+
+TEST_F(ViewAndroidBoundsTest, MatchesViewSizeOfkMatchParent) {
+  //  +----------------+
+  //  |  view1_/view3_ |
+  //  |                |
+  //  |   +--------+   |
+  //  |   |        |   |
+  //  |   | view2_ |   |
+  //  |   |      x |   | -> (100, 100)
+  //  |   +--------+   |
+  //  |             x  | -> (300, 400)
+  //  +----------------+
+
+  view1_.SetBounds(gfx::Point(20, 20), 400, 600);
+  view3_.SetBounds(gfx::Point(),
+                   ViewAndroid::Bounds::kMatchParent,
+                   ViewAndroid::Bounds::kMatchParent);
+  view2_.SetBounds(gfx::Point(50, 50), 200, 200);
+
+  // root
+  //   +-------+
+  //   |       |
+  // view2_  view1_
+  //           |
+  //         view3_
+
+  root_.AddChild(&view1_);
+  root_.AddChild(&view2_);
+  view1_.AddChild(&view3_);
+
+  GenerateTouchEventAt(100.f, 100.f);
+  EXPECT_FALSE(client1_.EventHandled());
+  EXPECT_TRUE(client2_.EventHandled());
+  EXPECT_FALSE(client3_.EventHandled());
+  Reset();
+
+  // |view3_|'s bounds matches with that of |view1_|. The event should hit
+  // |view3_| since |view1_|'s client does not handle events.
+  client1_.SetHandleEvent(false);
+  GenerateTouchEventAt(300.f, 400.f);
+  EXPECT_FALSE(client1_.EventHandled());
+  EXPECT_FALSE(client2_.EventHandled());
+  EXPECT_TRUE(client3_.EventHandled());
+}
+
+}  // namespace ui