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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 GetWindowUnderCursor() OVERRIDE {
     23     NOTIMPLEMENTED();
     24     return NULL;
     25   }
     26 
     27   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
     28       OVERRIDE {
     29     NOTIMPLEMENTED();
     30     return NULL;
     31   }
     32 
     33   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
     34     gfx::DeviceDisplayInfo device_info;
     35     const float device_scale_factor = device_info.GetDIPScale();
     36     // Note: GetPhysicalDisplayWidth/Height() does not subtract window
     37     // decorations etc. Use it instead of GetDisplayWidth/Height() when
     38     // available.
     39     const gfx::Rect bounds_in_pixels =
     40         gfx::Rect(device_info.GetPhysicalDisplayWidth()
     41                       ? device_info.GetPhysicalDisplayWidth()
     42                       : device_info.GetDisplayWidth(),
     43                   device_info.GetPhysicalDisplayHeight()
     44                       ? device_info.GetPhysicalDisplayHeight()
     45                       : device_info.GetDisplayHeight());
     46     const gfx::Rect bounds_in_dip =
     47         gfx::Rect(gfx::ToCeiledSize(gfx::ScaleSize(
     48             bounds_in_pixels.size(), 1.0f / device_scale_factor)));
     49     gfx::Display display(0, bounds_in_dip);
     50     if (!gfx::Display::HasForceDeviceScaleFactor())
     51       display.set_device_scale_factor(device_scale_factor);
     52     display.SetRotationAsDegree(device_info.GetRotationDegrees());
     53     return display;
     54   }
     55 
     56   virtual gfx::Display GetDisplayNearestWindow(
     57       gfx::NativeView view) const OVERRIDE {
     58     return GetPrimaryDisplay();
     59   }
     60 
     61   virtual gfx::Display GetDisplayNearestPoint(
     62       const gfx::Point& point) const OVERRIDE {
     63     return GetPrimaryDisplay();
     64   }
     65 
     66   virtual int GetNumDisplays() const OVERRIDE { return 1; }
     67 
     68   virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE {
     69     return std::vector<gfx::Display>(1, GetPrimaryDisplay());
     70   }
     71 
     72   virtual gfx::Display GetDisplayMatching(
     73       const gfx::Rect& match_rect) const OVERRIDE {
     74     return GetPrimaryDisplay();
     75   }
     76 
     77   virtual void AddObserver(DisplayObserver* observer) OVERRIDE {
     78     // no display change on Android.
     79   }
     80 
     81   virtual void RemoveObserver(DisplayObserver* observer) OVERRIDE {
     82     // no display change on Android.
     83   }
     84 
     85  private:
     86   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
     87 };
     88 
     89 Screen* CreateNativeScreen() {
     90   return new ScreenAndroid;
     91 }
     92 
     93 }  // namespace gfx
     94