ash/display/display_layout.h

   1 // Copyright (c) 2013 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 #ifndef ASH_DISPLAY_DISPLAY_LAYOUT_H_
   6 #define ASH_DISPLAY_DISPLAY_LAYOUT_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "ash/ash_export.h"
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14
  15 namespace base {
  16 class Value;
  17 template <typename T> class JSONValueConverter;
  18 }
  19
  20 namespace ash {
  21
  22 typedef std::pair<int64, int64> DisplayIdPair;
  23
  24 struct ASH_EXPORT DisplayLayout {
  25   // Layout options where the secondary display should be positioned.
  26   enum Position {
  27     TOP,
  28     RIGHT,
  29     BOTTOM,
  30     LEFT
  31   };
  32
  33   // Factory method to create DisplayLayout from ints. The |mirrored| is
  34   // set to false and |primary_id| is set to gfx::Display::kInvalidDisplayId.
  35   // Used for persistence and webui.
  36   static DisplayLayout FromInts(int position, int offsets);
  37
  38   DisplayLayout();
  39   DisplayLayout(Position position, int offset);
  40
  41   // Returns an inverted display layout.
  42   DisplayLayout Invert() const WARN_UNUSED_RESULT;
  43
  44   // Converter functions to/from base::Value.
  45   static bool ConvertFromValue(const base::Value& value, DisplayLayout* layout);
  46   static bool ConvertToValue(const DisplayLayout& layout, base::Value* value);
  47
  48   // This method is used by base::JSONValueConverter, you don't need to call
  49   // this directly. Instead consider using converter functions above.
  50   static void RegisterJSONConverter(
  51       base::JSONValueConverter<DisplayLayout>* converter);
  52
  53   Position position;
  54
  55   // The offset of the position of the secondary display.  The offset is
  56   // based on the top/left edge of the primary display.
  57   int offset;
  58
  59   // True if displays are mirrored.
  60   bool mirrored;
  61
  62   // The id of the display used as a primary display.
  63   int64 primary_id;
  64
  65   // Returns string representation of the layout for debugging/testing.
  66   std::string ToString() const;
  67 };
  68
  69 }  // namespace ash
  70
  71 #endif