ui/gfx/screen.cc

   1 // Copyright 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 "base/logging.h"
   6 #include "ui/gfx/screen.h"
   7 #include "ui/gfx/screen_type_delegate.h"
   8
   9 namespace gfx {
  10
  11 namespace {
  12
  13 Screen* g_screen_[SCREEN_TYPE_LAST + 1];
  14 ScreenTypeDelegate* g_screen_type_delegate_ = NULL;
  15
  16 }  // namespace
  17
  18 Screen::Screen() {
  19 }
  20
  21 Screen::~Screen() {
  22 }
  23
  24 // static
  25 Screen* Screen::GetScreenFor(NativeView view) {
  26   ScreenType type = SCREEN_TYPE_NATIVE;
  27   if (g_screen_type_delegate_)
  28     type = g_screen_type_delegate_->GetScreenTypeForNativeView(view);
  29   if (type == SCREEN_TYPE_NATIVE)
  30     return GetNativeScreen();
  31   DCHECK(g_screen_[type]);
  32   return g_screen_[type];
  33 }
  34
  35 // static
  36 void Screen::SetScreenInstance(ScreenType type, Screen* instance) {
  37   DCHECK_LE(type, SCREEN_TYPE_LAST);
  38   g_screen_[type] = instance;
  39 }
  40
  41 // static
  42 Screen* Screen::GetScreenByType(ScreenType type) {
  43   return g_screen_[type];
  44 }
  45
  46 // static
  47 void Screen::SetScreenTypeDelegate(ScreenTypeDelegate* delegate) {
  48   g_screen_type_delegate_ = delegate;
  49 }
  50
  51 // static
  52 Screen* Screen::GetNativeScreen() {
  53   if (!g_screen_[SCREEN_TYPE_NATIVE])
  54     g_screen_[SCREEN_TYPE_NATIVE] = CreateNativeScreen();
  55   return g_screen_[SCREEN_TYPE_NATIVE];
  56 }
  57
  58 }  // namespace gfx