Move Screen, its impls, DisplayObserver and DisplayChangeNotifier to ui/display

ui/gfx/display_change_notifier_unittest.cc

-// Copyright 2014 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 "ui/gfx/display_change_notifier.h"
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/display_observer.h"
-
-namespace gfx {
-
-class MockDisplayObserver : public DisplayObserver {
- public:
-  MockDisplayObserver()
-    : display_added_(0),
-      display_removed_(0),
-      display_changed_(0),
-      latest_metrics_change_(DisplayObserver::DISPLAY_METRIC_NONE)
-  {}
-
-  ~MockDisplayObserver() override {}
-
-  void OnDisplayAdded(const Display& display) override { display_added_++; }
-
-  void OnDisplayRemoved(const Display& display) override { display_removed_++; }
-
-  void OnDisplayMetricsChanged(const Display& display,
-                               uint32_t metrics) override {
-    display_changed_++;
-    latest_metrics_change_ = metrics;
-  }
-
-  int display_added() const {
-    return display_added_;
-  }
-
-  int display_removed() const {
-    return display_removed_;
-  }
-
-  int display_changed() const {
-    return display_changed_;
-  }
-
-  uint32_t latest_metrics_change() const {
-    return latest_metrics_change_;
-  }
-
- protected:
-  int display_added_;
-  int display_removed_;
-  int display_changed_;
-  uint32_t latest_metrics_change_;
-
-  DISALLOW_COPY_AND_ASSIGN(MockDisplayObserver);
-};
-
-TEST(DisplayChangeNotifierTest, AddObserver_Smoke) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-
-  change_notifier.NotifyDisplaysChanged(
-    std::vector<Display>(), std::vector<Display>(1, Display()));
-  EXPECT_EQ(0, observer.display_added());
-
-  change_notifier.AddObserver(&observer);
-  change_notifier.NotifyDisplaysChanged(
-    std::vector<Display>(), std::vector<Display>(1, Display()));
-  EXPECT_EQ(1, observer.display_added());
-}
-
-TEST(DisplayChangeNotifier, RemoveObserver_Smoke) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-
-  change_notifier.NotifyDisplaysChanged(
-    std::vector<Display>(), std::vector<Display>(1, Display()));
-  EXPECT_EQ(0, observer.display_added());
-
-  change_notifier.AddObserver(&observer);
-  change_notifier.RemoveObserver(&observer);
-
-  change_notifier.NotifyDisplaysChanged(
-    std::vector<Display>(), std::vector<Display>(1, Display()));
-  EXPECT_EQ(0, observer.display_added());
-}
-
-TEST(DisplayChangeNotifierTest, RemoveObserver_Unknown) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-
-  change_notifier.RemoveObserver(&observer);
-  // Should not crash.
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Removed) {
-  DisplayChangeNotifier change_notifier;
-
-  // If the previous display array is empty, no removal.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    new_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_removed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the previous and new display array are empty, no removal.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_removed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the new display array is empty, there are as many removal as old
-  // displays.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display());
-    old_displays.push_back(Display());
-    old_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(3, observer.display_removed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If displays don't use ids, as long as the new display array has one
-  // element, there are no removals.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display());
-    old_displays.push_back(Display());
-    old_displays.push_back(Display());
-    new_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_removed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If displays use ids (and they are unique), ids not present in the new
-  // display array will be marked as removed.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1));
-    old_displays.push_back(Display(2));
-    old_displays.push_back(Display(3));
-    new_displays.push_back(Display(2));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(2, observer.display_removed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Added) {
-  DisplayChangeNotifier change_notifier;
-
-  // If the new display array is empty, no addition.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_added());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the old and new display arrays are empty, no addition.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_added());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the old display array is empty, there are as many addition as new
-  // displays.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    new_displays.push_back(Display());
-    new_displays.push_back(Display());
-    new_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(3, observer.display_added());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If displays don't use ids, as long as the old display array has one
-  // element, there are no additions.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display());
-    new_displays.push_back(Display());
-    new_displays.push_back(Display());
-    new_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_added());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If displays use ids (and they are unique), ids not present in the old
-  // display array will be marked as added.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1));
-    new_displays.push_back(Display(1));
-    new_displays.push_back(Display(2));
-    new_displays.push_back(Display(3));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(2, observer.display_added());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Smoke) {
-  DisplayChangeNotifier change_notifier;
-
-  // If the old display array is empty, no change.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    new_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_changed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the new display array is empty, no change.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display());
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_changed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If the old and new display arrays are empty, no change.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_changed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  // If there is an intersection between old and new displays but there are no
-  // metrics changes, there is no display change.
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1));
-    new_displays.push_back(Display(1));
-    new_displays.push_back(Display(2));
-    new_displays.push_back(Display(3));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_changed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Bounds) {
-  DisplayChangeNotifier change_notifier;
-
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-    new_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(0, observer.display_changed());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-    new_displays.push_back(Display(1, Rect(10, 10, 300, 300)));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(1, observer.display_changed());
-    uint32_t metrics_change = DisplayObserver::DISPLAY_METRIC_BOUNDS |
-                                  DisplayObserver::DISPLAY_METRIC_WORK_AREA;
-    EXPECT_EQ(metrics_change, observer.latest_metrics_change());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-
-  {
-    MockDisplayObserver observer;
-    change_notifier.AddObserver(&observer);
-
-    std::vector<Display> old_displays, new_displays;
-    old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-    new_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-    new_displays[0].set_bounds(Rect(10, 10, 300, 300));
-
-    change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-    EXPECT_EQ(1, observer.display_changed());
-    EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_BOUNDS,
-              observer.latest_metrics_change());
-
-    change_notifier.RemoveObserver(&observer);
-  }
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Rotation) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-  change_notifier.AddObserver(&observer);
-
-  std::vector<Display> old_displays, new_displays;
-  old_displays.push_back(Display(1));
-  old_displays[0].SetRotationAsDegree(0);
-  new_displays.push_back(Display(1));
-  new_displays[0].SetRotationAsDegree(180);
-
-  change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-  EXPECT_EQ(1, observer.display_changed());
-  EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_ROTATION,
-            observer.latest_metrics_change());
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_WorkArea) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-  change_notifier.AddObserver(&observer);
-
-  std::vector<Display> old_displays, new_displays;
-  old_displays.push_back(Display(1));
-  old_displays[0].set_work_area(Rect(0, 0, 200, 200));
-  new_displays.push_back(Display(1));
-  new_displays[0].set_work_area(Rect(20, 20, 300, 300));
-
-  change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-  EXPECT_EQ(1, observer.display_changed());
-  EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_WORK_AREA,
-            observer.latest_metrics_change());
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_DSF) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-  change_notifier.AddObserver(&observer);
-
-  std::vector<Display> old_displays, new_displays;
-  old_displays.push_back(Display(1));
-  old_displays[0].set_device_scale_factor(1.f);
-  new_displays.push_back(Display(1));
-  new_displays[0].set_device_scale_factor(2.f);
-
-  change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-  EXPECT_EQ(1, observer.display_changed());
-  EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR,
-            observer.latest_metrics_change());
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Multi_Displays) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-  change_notifier.AddObserver(&observer);
-
-  std::vector<Display> old_displays, new_displays;
-  old_displays.push_back(Display(1));
-  old_displays.push_back(Display(2));
-  old_displays.push_back(Display(3));
-  new_displays.push_back(Display(1));
-  new_displays.push_back(Display(2));
-  new_displays.push_back(Display(3));
-
-  old_displays[0].set_device_scale_factor(1.f);
-  new_displays[0].set_device_scale_factor(2.f);
-
-  old_displays[1].set_bounds(Rect(0, 0, 200, 200));
-  new_displays[1].set_bounds(Rect(0, 0, 400, 400));
-
-  old_displays[2].SetRotationAsDegree(0);
-  new_displays[2].SetRotationAsDegree(90);
-
-  change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-  EXPECT_EQ(3, observer.display_changed());
-}
-
-TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Multi_Metrics) {
-  DisplayChangeNotifier change_notifier;
-  MockDisplayObserver observer;
-  change_notifier.AddObserver(&observer);
-
-  std::vector<Display> old_displays, new_displays;
-  old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
-  old_displays[0].set_device_scale_factor(1.f);
-  old_displays[0].SetRotationAsDegree(0);
-
-  new_displays.push_back(Display(1, Rect(100, 100, 200, 200)));
-  new_displays[0].set_device_scale_factor(2.f);
-  new_displays[0].SetRotationAsDegree(90);
-
-  change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
-  EXPECT_EQ(1, observer.display_changed());
-  uint32_t metrics = DisplayObserver::DISPLAY_METRIC_BOUNDS |
-                         DisplayObserver::DISPLAY_METRIC_ROTATION |
-                         DisplayObserver::DISPLAY_METRIC_WORK_AREA |
-                         DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
-  EXPECT_EQ(metrics, observer.latest_metrics_change());
-}
-
-} // namespace gfx