ui/gfx/screen_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/screen_win.h"
   6
   7 #include <windows.h>
   8
   9 #include "base/hash.h"
  10 #include "base/logging.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/win/win_util.h"
  13 #include "ui/gfx/display.h"
  14 #include "ui/gfx/win/dpi.h"
  15
  16 namespace {
  17
  18 MONITORINFOEX GetMonitorInfoForMonitor(HMONITOR monitor) {
  19   MONITORINFOEX monitor_info;
  20   ZeroMemory(&monitor_info, sizeof(MONITORINFOEX));
  21   monitor_info.cbSize = sizeof(monitor_info);
  22   GetMonitorInfo(monitor, &monitor_info);
  23   return monitor_info;
  24 }
  25
  26 gfx::Display GetDisplay(MONITORINFOEX& monitor_info) {
  27   // TODO(oshima): Implement Observer.
  28   int64 id = static_cast<int64>(
  29       base::Hash(base::WideToUTF8(monitor_info.szDevice)));
  30   gfx::Rect bounds = gfx::Rect(monitor_info.rcMonitor);
  31   gfx::Display display(id, bounds);
  32   display.set_work_area(gfx::Rect(monitor_info.rcWork));
  33   display.SetScaleAndBounds(gfx::win::GetDeviceScaleFactor(), bounds);
  34   return display;
  35 }
  36
  37 BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
  38                                   HDC hdc,
  39                                   LPRECT rect,
  40                                   LPARAM data) {
  41   std::vector<gfx::Display>* all_displays =
  42       reinterpret_cast<std::vector<gfx::Display>*>(data);
  43   DCHECK(all_displays);
  44
  45   MONITORINFOEX monitor_info = GetMonitorInfoForMonitor(monitor);
  46   gfx::Display display = GetDisplay(monitor_info);
  47   all_displays->push_back(display);
  48   return TRUE;
  49 }
  50
  51 }  // namespace
  52
  53 namespace gfx {
  54
  55 ScreenWin::ScreenWin() {
  56 }
  57
  58 ScreenWin::~ScreenWin() {
  59 }
  60
  61 bool ScreenWin::IsDIPEnabled() {
  62   return IsInHighDPIMode();
  63 }
  64
  65 gfx::Point ScreenWin::GetCursorScreenPoint() {
  66   POINT pt;
  67   GetCursorPos(&pt);
  68   gfx::Point cursor_pos_pixels(pt);
  69   return gfx::win::ScreenToDIPPoint(cursor_pos_pixels);
  70 }
  71
  72 gfx::NativeWindow ScreenWin::GetWindowUnderCursor() {
  73   POINT cursor_loc;
  74   HWND hwnd = GetCursorPos(&cursor_loc) ? WindowFromPoint(cursor_loc) : NULL;
  75   return GetNativeWindowFromHWND(hwnd);
  76 }
  77
  78 gfx::NativeWindow ScreenWin::GetWindowAtScreenPoint(const gfx::Point& point) {
  79   gfx::Point point_in_pixels = gfx::win::DIPToScreenPoint(point);
  80   return GetNativeWindowFromHWND(WindowFromPoint(point_in_pixels.ToPOINT()));
  81 }
  82
  83 int ScreenWin::GetNumDisplays() const {
  84   return GetSystemMetrics(SM_CMONITORS);
  85 }
  86
  87 std::vector<gfx::Display> ScreenWin::GetAllDisplays() const {
  88   std::vector<gfx::Display> all_displays;
  89   EnumDisplayMonitors(NULL, NULL, EnumMonitorCallback,
  90                       reinterpret_cast<LPARAM>(&all_displays));
  91   return all_displays;
  92 }
  93
  94 gfx::Display ScreenWin::GetDisplayNearestWindow(gfx::NativeView window) const {
  95   HWND window_hwnd = GetHWNDFromNativeView(window);
  96   if (!window_hwnd) {
  97     // When |window| isn't rooted to a display, we should just return the
  98     // default display so we get some correct display information like the
  99     // scaling factor.
 100     return GetPrimaryDisplay();
 101   }
 102
 103   MONITORINFOEX monitor_info;
 104   monitor_info.cbSize = sizeof(monitor_info);
 105   GetMonitorInfo(MonitorFromWindow(window_hwnd, MONITOR_DEFAULTTONEAREST),
 106                  &monitor_info);
 107   return GetDisplay(monitor_info);
 108 }
 109
 110 gfx::Display ScreenWin::GetDisplayNearestPoint(const gfx::Point& point) const {
 111   POINT initial_loc = { point.x(), point.y() };
 112   HMONITOR monitor = MonitorFromPoint(initial_loc, MONITOR_DEFAULTTONEAREST);
 113   MONITORINFOEX mi;
 114   ZeroMemory(&mi, sizeof(MONITORINFOEX));
 115   mi.cbSize = sizeof(mi);
 116   if (monitor && GetMonitorInfo(monitor, &mi)) {
 117     return GetDisplay(mi);
 118   }
 119   return gfx::Display();
 120 }
 121
 122 gfx::Display ScreenWin::GetDisplayMatching(const gfx::Rect& match_rect) const {
 123   RECT other_bounds_rect = match_rect.ToRECT();
 124   MONITORINFOEX monitor_info = GetMonitorInfoForMonitor(MonitorFromRect(
 125       &other_bounds_rect, MONITOR_DEFAULTTONEAREST));
 126   return GetDisplay(monitor_info);
 127 }
 128
 129 gfx::Display ScreenWin::GetPrimaryDisplay() const {
 130   MONITORINFOEX mi = GetMonitorInfoForMonitor(
 131       MonitorFromWindow(NULL, MONITOR_DEFAULTTOPRIMARY));
 132   gfx::Display display = GetDisplay(mi);
 133   // TODO(kevers|girard): Test if these checks can be reintroduced for high-DIP
 134   // once more of the app is DIP-aware.
 135   if (!(IsInHighDPIMode() || IsHighDPIEnabled())) {
 136     DCHECK_EQ(GetSystemMetrics(SM_CXSCREEN), display.size().width());
 137     DCHECK_EQ(GetSystemMetrics(SM_CYSCREEN), display.size().height());
 138   }
 139   return display;
 140 }
 141
 142 void ScreenWin::AddObserver(DisplayObserver* observer) {
 143   // TODO(oshima): crbug.com/122863.
 144 }
 145
 146 void ScreenWin::RemoveObserver(DisplayObserver* observer) {
 147   // TODO(oshima): crbug.com/122863.
 148 }
 149
 150 HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
 151   NOTREACHED();
 152   return NULL;
 153 }
 154
 155 NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
 156   NOTREACHED();
 157   return NULL;
 158 }
 159
 160 }  // namespace gfx