chrome/browser/fullscreen_win.cc

   1 // Copyright (c) 2011 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 "chrome/browser/fullscreen.h"
   6
   7 #include <windows.h>
   8 #include <shellapi.h>
   9
  10 #include "base/logging.h"
  11 #include "base/win/win_util.h"
  12 #include "base/win/windows_version.h"
  13
  14 #if defined(USE_ASH)
  15 #include "ash/root_window_controller.h"
  16 #include "chrome/browser/ui/host_desktop.h"
  17 #endif
  18
  19 static bool IsPlatformFullScreenMode() {
  20   // SHQueryUserNotificationState is only available for Vista and above.
  21 #if defined(NTDDI_VERSION) && (NTDDI_VERSION >= NTDDI_VISTA)
  22   if (base::win::GetVersion() < base::win::VERSION_VISTA)
  23     return false;
  24
  25   typedef HRESULT(WINAPI *SHQueryUserNotificationStatePtr)(
  26       QUERY_USER_NOTIFICATION_STATE* state);
  27
  28   HMODULE shell32_base = ::GetModuleHandle(L"shell32.dll");
  29   if (!shell32_base) {
  30     NOTREACHED();
  31     return false;
  32   }
  33   SHQueryUserNotificationStatePtr query_user_notification_state_ptr =
  34         reinterpret_cast<SHQueryUserNotificationStatePtr>
  35             (::GetProcAddress(shell32_base, "SHQueryUserNotificationState"));
  36   if (!query_user_notification_state_ptr) {
  37     NOTREACHED();
  38     return false;
  39   }
  40
  41   QUERY_USER_NOTIFICATION_STATE state;
  42   if (FAILED((*query_user_notification_state_ptr)(&state)))
  43     return false;
  44   return state == QUNS_RUNNING_D3D_FULL_SCREEN ||
  45          state == QUNS_PRESENTATION_MODE;
  46 #else
  47   return false;
  48 #endif
  49 }
  50
  51 static bool IsFullScreenWindowMode() {
  52   // Get the foreground window which the user is currently working on.
  53   HWND wnd = ::GetForegroundWindow();
  54   if (!wnd)
  55     return false;
  56
  57   // Get the monitor where the window is located.
  58   RECT wnd_rect;
  59   if (!::GetWindowRect(wnd, &wnd_rect))
  60     return false;
  61   HMONITOR monitor = ::MonitorFromRect(&wnd_rect, MONITOR_DEFAULTTONULL);
  62   if (!monitor)
  63     return false;
  64   MONITORINFO monitor_info = { sizeof(monitor_info) };
  65   if (!::GetMonitorInfo(monitor, &monitor_info))
  66     return false;
  67
  68   // It should be the main monitor.
  69   if (!(monitor_info.dwFlags & MONITORINFOF_PRIMARY))
  70     return false;
  71
  72   // The window should be at least as large as the monitor.
  73   if (!::IntersectRect(&wnd_rect, &wnd_rect, &monitor_info.rcMonitor))
  74     return false;
  75   if (!::EqualRect(&wnd_rect, &monitor_info.rcMonitor))
  76     return false;
  77
  78   // At last, the window style should not have WS_DLGFRAME and WS_THICKFRAME and
  79   // its extended style should not have WS_EX_WINDOWEDGE and WS_EX_TOOLWINDOW.
  80   LONG style = ::GetWindowLong(wnd, GWL_STYLE);
  81   LONG ext_style = ::GetWindowLong(wnd, GWL_EXSTYLE);
  82   return !((style & (WS_DLGFRAME | WS_THICKFRAME)) ||
  83            (ext_style & (WS_EX_WINDOWEDGE | WS_EX_TOOLWINDOW)));
  84 }
  85
  86 static bool IsFullScreenConsoleMode() {
  87   // We detect this by attaching the current process to the console of the
  88   // foreground window and then checking if it is in full screen mode.
  89   DWORD pid = 0;
  90   ::GetWindowThreadProcessId(::GetForegroundWindow(), &pid);
  91   if (!pid)
  92     return false;
  93
  94   if (!::AttachConsole(pid))
  95     return false;
  96
  97   DWORD modes = 0;
  98   ::GetConsoleDisplayMode(&modes);
  99   ::FreeConsole();
 100
 101   return (modes & (CONSOLE_FULLSCREEN | CONSOLE_FULLSCREEN_HARDWARE)) != 0;
 102 }
 103
 104 bool IsFullScreenMode() {
 105 #if defined(USE_ASH)
 106   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH) {
 107     ash::RootWindowController* controller =
 108         ash::RootWindowController::ForTargetRootWindow();
 109     return controller && controller->GetWindowForFullscreenMode();
 110   }
 111 #endif
 112   return IsPlatformFullScreenMode() ||
 113          IsFullScreenWindowMode() ||
 114          IsFullScreenConsoleMode();
 115 }