Revert of Move ScreenWin to ui/display

ui/gfx/screen_win.cc

Index: ui/gfx/screen_win.cc
diff --git a/ui/gfx/screen_win.cc b/ui/gfx/screen_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..46bce435e742d3afa9d99a2ff3c87a331d3be19a
--- /dev/null
+++ b/ui/gfx/screen_win.cc
@@ -0,0 +1,243 @@
+// Copyright (c) 2012 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/screen_win.h"
+
+#include <windows.h>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/win/display_info.h"
+#include "ui/gfx/win/dpi.h"
+#include "ui/gfx/win/screen_win_display.h"
+
+namespace {
+
+std::vector<gfx::win::ScreenWinDisplay> DisplayInfosToScreenWinDisplays(
+    const std::vector<gfx::win::DisplayInfo>& display_infos) {
+  std::vector<gfx::win::ScreenWinDisplay> screen_win_displays;
+  for (const auto& display_info : display_infos)
+    screen_win_displays.push_back(gfx::win::ScreenWinDisplay(display_info));
+
+  return screen_win_displays;
+}
+
+std::vector<gfx::Display> ScreenWinDisplaysToDisplays(
+    const std::vector<gfx::win::ScreenWinDisplay>& screen_win_displays) {
+  std::vector<gfx::Display> displays;
+  for (const auto& screen_win_display : screen_win_displays)
+    displays.push_back(screen_win_display.display());
+
+  return displays;
+}
+
+MONITORINFOEX MonitorInfoFromHMONITOR(HMONITOR monitor) {
+  MONITORINFOEX monitor_info;
+  ::ZeroMemory(&monitor_info, sizeof(monitor_info));
+  monitor_info.cbSize = sizeof(monitor_info);
+  ::GetMonitorInfo(monitor, &monitor_info);
+  return monitor_info;
+}
+
+BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
+                                  HDC hdc,
+                                  LPRECT rect,
+                                  LPARAM data) {
+  std::vector<gfx::win::DisplayInfo>* display_infos =
+      reinterpret_cast<std::vector<gfx::win::DisplayInfo>*>(data);
+  DCHECK(display_infos);
+  display_infos->push_back(
+      gfx::win::DisplayInfo(MonitorInfoFromHMONITOR(monitor),
+                            gfx::GetDPIScale()));
+  return TRUE;
+}
+
+std::vector<gfx::win::DisplayInfo> GetDisplayInfosFromSystem() {
+  std::vector<gfx::win::DisplayInfo> display_infos;
+  EnumDisplayMonitors(nullptr, nullptr, EnumMonitorCallback,
+                      reinterpret_cast<LPARAM>(&display_infos));
+  DCHECK_EQ(static_cast<size_t>(::GetSystemMetrics(SM_CMONITORS)),
+            display_infos.size());
+  return display_infos;
+}
+
+}  // namespace
+
+namespace gfx {
+
+ScreenWin::ScreenWin() {
+  Initialize();
+}
+
+ScreenWin::~ScreenWin() = default;
+
+HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
+  NOTREACHED();
+  return nullptr;
+}
+
+NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
+  NOTREACHED();
+  return nullptr;
+}
+
+gfx::Point ScreenWin::GetCursorScreenPoint() {
+  POINT pt;
+  ::GetCursorPos(&pt);
+  gfx::Point cursor_pos_pixels(pt);
+  return gfx::win::ScreenToDIPPoint(cursor_pos_pixels);
+}
+
+gfx::NativeWindow ScreenWin::GetWindowUnderCursor() {
+  POINT cursor_loc;
+  HWND hwnd =
+      ::GetCursorPos(&cursor_loc) ? ::WindowFromPoint(cursor_loc) : nullptr;
+  return GetNativeWindowFromHWND(hwnd);
+}
+
+gfx::NativeWindow ScreenWin::GetWindowAtScreenPoint(const gfx::Point& point) {
+  gfx::Point point_in_pixels = gfx::win::DIPToScreenPoint(point);
+  return GetNativeWindowFromHWND(WindowFromPoint(point_in_pixels.ToPOINT()));
+}
+
+int ScreenWin::GetNumDisplays() const {
+  return static_cast<int>(screen_win_displays_.size());
+}
+
+std::vector<gfx::Display> ScreenWin::GetAllDisplays() const {
+  return ScreenWinDisplaysToDisplays(screen_win_displays_);
+}
+
+gfx::Display ScreenWin::GetDisplayNearestWindow(gfx::NativeView window) const {
+  HWND window_hwnd = GetHWNDFromNativeView(window);
+  if (!window_hwnd) {
+    // When |window| isn't rooted to a display, we should just return the
+    // default display so we get some correct display information like the
+    // scaling factor.
+    return GetPrimaryDisplay();
+  }
+  gfx::win::ScreenWinDisplay screen_win_display =
+      GetScreenWinDisplayNearestHWND(window_hwnd);
+  return screen_win_display.display();
+}
+
+gfx::Display ScreenWin::GetDisplayNearestPoint(const gfx::Point& point) const {
+  gfx::Point screen_point(gfx::win::DIPToScreenPoint(point));
+  gfx::win::ScreenWinDisplay screen_win_display =
+      GetScreenWinDisplayNearestScreenPoint(screen_point);
+  return screen_win_display.display();
+}
+
+gfx::Display ScreenWin::GetDisplayMatching(const gfx::Rect& match_rect) const {
+  gfx::win::ScreenWinDisplay screen_win_display =
+      GetScreenWinDisplayNearestScreenRect(match_rect);
+  return screen_win_display.display();
+}
+
+gfx::Display ScreenWin::GetPrimaryDisplay() const {
+  return GetPrimaryScreenWinDisplay().display();
+}
+
+void ScreenWin::AddObserver(DisplayObserver* observer) {
+  change_notifier_.AddObserver(observer);
+}
+
+void ScreenWin::RemoveObserver(DisplayObserver* observer) {
+  change_notifier_.RemoveObserver(observer);
+}
+
+void ScreenWin::UpdateFromDisplayInfos(
+    const std::vector<gfx::win::DisplayInfo>& display_infos) {
+  screen_win_displays_ = DisplayInfosToScreenWinDisplays(display_infos);
+}
+
+void ScreenWin::Initialize() {
+  singleton_hwnd_observer_.reset(
+      new gfx::SingletonHwndObserver(
+          base::Bind(&ScreenWin::OnWndProc, base::Unretained(this))));
+  UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
+}
+
+MONITORINFOEX ScreenWin::MonitorInfoFromScreenPoint(
+    const gfx::Point& screen_point) const {
+  POINT initial_loc = { screen_point.x(), screen_point.y() };
+  return MonitorInfoFromHMONITOR(::MonitorFromPoint(initial_loc,
+                                                    MONITOR_DEFAULTTONEAREST));
+}
+
+MONITORINFOEX ScreenWin::MonitorInfoFromScreenRect(const gfx::Rect& screen_rect)
+    const {
+  RECT win_rect = screen_rect.ToRECT();
+  return MonitorInfoFromHMONITOR(::MonitorFromRect(&win_rect,
+                                                   MONITOR_DEFAULTTONEAREST));
+}
+
+MONITORINFOEX ScreenWin::MonitorInfoFromWindow(HWND hwnd,
+                                               DWORD default_options) const {
+  return MonitorInfoFromHMONITOR(::MonitorFromWindow(hwnd, default_options));
+}
+
+HWND ScreenWin::GetRootWindow(HWND hwnd) const {
+  return ::GetAncestor(hwnd, GA_ROOT);
+}
+
+void ScreenWin::OnWndProc(HWND hwnd,
+                          UINT message,
+                          WPARAM wparam,
+                          LPARAM lparam) {
+  if (message != WM_DISPLAYCHANGE)
+    return;
+
+  std::vector<gfx::Display> old_displays = GetAllDisplays();
+  UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
+  change_notifier_.NotifyDisplaysChanged(old_displays, GetAllDisplays());
+}
+
+gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestHWND(HWND hwnd)
+    const {
+  return GetScreenWinDisplay(MonitorInfoFromWindow(hwnd,
+                                                   MONITOR_DEFAULTTONEAREST));
+}
+
+gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenRect(
+    const Rect& screen_rect) const {
+  return GetScreenWinDisplay(MonitorInfoFromScreenRect(screen_rect));
+}
+
+gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenPoint(
+    const Point& screen_point) const {
+  return GetScreenWinDisplay(MonitorInfoFromScreenPoint(screen_point));
+}
+
+gfx::win::ScreenWinDisplay ScreenWin::GetPrimaryScreenWinDisplay() const {
+  MONITORINFOEX monitor_info = MonitorInfoFromWindow(nullptr,
+                                                     MONITOR_DEFAULTTOPRIMARY);
+  gfx::win::ScreenWinDisplay screen_win_display =
+      GetScreenWinDisplay(monitor_info);
+  gfx::Display display = screen_win_display.display();
+  // The Windows primary monitor is defined to have an origin of (0, 0).
+  DCHECK_EQ(0, display.bounds().origin().x());
+  DCHECK_EQ(0, display.bounds().origin().y());
+  return screen_win_display;
+}
+
+gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplay(
+    const MONITORINFOEX& monitor_info) const {
+  int64_t id =
+      gfx::win::DisplayInfo::DeviceIdFromDeviceName(monitor_info.szDevice);
+  for (const auto& screen_win_display : screen_win_displays_) {
+    if (screen_win_display.display().id() == id)
+      return screen_win_display;
+  }
+  // There is 1:1 correspondence between MONITORINFOEX and ScreenWinDisplay.
+  // If we make it here, it means we have no displays and we should hand out the
+  // default display.
+  DCHECK_EQ(screen_win_displays_.size(), 0u);
+  return gfx::win::ScreenWinDisplay();
+}
+
+}  // namespace gfx