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      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.h"
      6 
      7 #import <UIKit/UIKit.h>
      8 
      9 #include "base/logging.h"
     10 #include "ui/gfx/display.h"
     11 
     12 namespace {
     13 
     14 class ScreenIos : public gfx::Screen {
     15   virtual bool IsDIPEnabled() OVERRIDE {
     16     return true;
     17   }
     18 
     19   virtual gfx::Point GetCursorScreenPoint() OVERRIDE {
     20     NOTIMPLEMENTED();
     21     return gfx::Point(0, 0);
     22   }
     23 
     24   virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE {
     25     NOTIMPLEMENTED();
     26     return gfx::NativeWindow();
     27   }
     28 
     29   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
     30       OVERRIDE {
     31     NOTIMPLEMENTED();
     32     return gfx::NativeWindow();
     33   }
     34 
     35   virtual int GetNumDisplays() const OVERRIDE {
     36 #if TARGET_IPHONE_SIMULATOR
     37     // UIScreen does not reliably return correct results on the simulator.
     38     return 1;
     39 #else
     40     return [[UIScreen screens] count];
     41 #endif
     42   }
     43 
     44   virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE {
     45     NOTIMPLEMENTED();
     46     return std::vector<gfx::Display>(1, GetPrimaryDisplay());
     47   }
     48 
     49   // Returns the display nearest the specified window.
     50   virtual gfx::Display GetDisplayNearestWindow(
     51       gfx::NativeView view) const OVERRIDE {
     52     NOTIMPLEMENTED();
     53     return gfx::Display();
     54   }
     55 
     56   // Returns the the display nearest the specified point.
     57   virtual gfx::Display GetDisplayNearestPoint(
     58       const gfx::Point& point) const OVERRIDE {
     59     NOTIMPLEMENTED();
     60     return gfx::Display();
     61   }
     62 
     63   // Returns the display that most closely intersects the provided bounds.
     64   virtual gfx::Display GetDisplayMatching(
     65       const gfx::Rect& match_rect) const OVERRIDE {
     66     NOTIMPLEMENTED();
     67     return gfx::Display();
     68   }
     69 
     70   // Returns the primary display.
     71   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
     72     UIScreen* mainScreen = [UIScreen mainScreen];
     73     CHECK(mainScreen);
     74     gfx::Display display(0, gfx::Rect(mainScreen.bounds));
     75     display.set_device_scale_factor([mainScreen scale]);
     76     return display;
     77   }
     78 
     79   virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE {
     80     // no display change on iOS.
     81   }
     82 
     83   virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE {
     84     // no display change on iOS.
     85   }
     86 };
     87 
     88 }  // namespace
     89 
     90 namespace gfx {
     91 
     92 Screen* CreateNativeScreen() {
     93   return new ScreenIos;
     94 }
     95 
     96 }  // namespace gfx
     97