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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 #include "base/logging.h"
      8 #include "ui/gfx/android/device_display_info.h"
      9 #include "ui/gfx/display.h"
     10 #include "ui/gfx/size_conversions.h"
     11 
     12 namespace gfx {
     13 
     14 class ScreenAndroid : public Screen {
     15  public:
     16   ScreenAndroid() {}
     17 
     18   virtual bool IsDIPEnabled() OVERRIDE { return true; }
     19 
     20   virtual gfx::Point GetCursorScreenPoint() OVERRIDE { return gfx::Point(); }
     21 
     22   virtual gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
     23     NOTIMPLEMENTED();
     24     return NULL;
     25   }
     26 
     27   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
     28     gfx::DeviceDisplayInfo device_info;
     29     const float device_scale_factor = device_info.GetDIPScale();
     30     const gfx::Rect bounds_in_pixels =
     31         gfx::Rect(
     32             device_info.GetDisplayWidth(),
     33             device_info.GetDisplayHeight());
     34     const gfx::Rect bounds_in_dip =
     35         gfx::Rect(gfx::ToCeiledSize(gfx::ScaleSize(
     36             bounds_in_pixels.size(), 1.0f / device_scale_factor)));
     37     gfx::Display display(0, bounds_in_dip);
     38     if (!gfx::Display::HasForceDeviceScaleFactor())
     39       display.set_device_scale_factor(device_scale_factor);
     40     return display;
     41   }
     42 
     43   virtual gfx::Display GetDisplayNearestWindow(
     44       gfx::NativeView view) const OVERRIDE {
     45     return GetPrimaryDisplay();
     46   }
     47 
     48   virtual gfx::Display GetDisplayNearestPoint(
     49       const gfx::Point& point) const OVERRIDE {
     50     return GetPrimaryDisplay();
     51   }
     52 
     53   virtual int GetNumDisplays() OVERRIDE { return 1; }
     54 
     55   virtual gfx::Display GetDisplayMatching(
     56       const gfx::Rect& match_rect) const OVERRIDE {
     57     return GetPrimaryDisplay();
     58   }
     59 
     60   virtual void AddObserver(DisplayObserver* observer) OVERRIDE {
     61     // no display change on Android.
     62   }
     63 
     64   virtual void RemoveObserver(DisplayObserver* observer) OVERRIDE {
     65     // no display change on Android.
     66   }
     67 
     68  private:
     69   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
     70 };
     71 
     72 Screen* CreateNativeScreen() {
     73   return new ScreenAndroid;
     74 }
     75 
     76 }  // namespace gfx
     77