ui/views/win/scoped_fullscreen_visibility.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/views/win/scoped_fullscreen_visibility.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace views {
  10
  11 // static
  12 std::map<HWND, int>* ScopedFullscreenVisibility::full_screen_windows_ = NULL;
  13
  14 ScopedFullscreenVisibility::ScopedFullscreenVisibility(HWND hwnd)
  15     : hwnd_(hwnd) {
  16   if (!full_screen_windows_)
  17     full_screen_windows_ = new FullscreenHWNDs;
  18   FullscreenHWNDs::iterator it = full_screen_windows_->find(hwnd_);
  19   if (it != full_screen_windows_->end()) {
  20     it->second++;
  21   } else {
  22     full_screen_windows_->insert(std::make_pair(hwnd_, 1));
  23     // NOTE: Be careful not to activate any windows here (for example, calling
  24     // ShowWindow(SW_HIDE) will automatically activate another window).  This
  25     // code can be called while a window is being deactivated, and activating
  26     // another window will screw up the activation that is already in progress.
  27     SetWindowPos(hwnd_, NULL, 0, 0, 0, 0,
  28                  SWP_HIDEWINDOW | SWP_NOACTIVATE | SWP_NOMOVE |
  29                  SWP_NOREPOSITION | SWP_NOSIZE | SWP_NOZORDER);
  30   }
  31 }
  32
  33 ScopedFullscreenVisibility::~ScopedFullscreenVisibility() {
  34   FullscreenHWNDs::iterator it = full_screen_windows_->find(hwnd_);
  35   DCHECK(it != full_screen_windows_->end());
  36   if (--it->second == 0) {
  37     full_screen_windows_->erase(it);
  38     ShowWindow(hwnd_, SW_SHOW);
  39   }
  40   if (full_screen_windows_->empty()) {
  41     delete full_screen_windows_;
  42     full_screen_windows_ = NULL;
  43   }
  44 }
  45
  46 // static
  47 bool ScopedFullscreenVisibility::IsHiddenForFullscreen(HWND hwnd) {
  48   if (!full_screen_windows_)
  49     return false;
  50   return full_screen_windows_->find(hwnd) != full_screen_windows_->end();
  51 }
  52
  53 }  // namespace views