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      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
     59