ui/base/resource/material_design/material_design_controller.h

   1 // Copyright 2015 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 UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
   6 #define UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
   7
   8 #include "base/macros.h"
   9 #include "ui/base/ui_base_export.h"
  10
  11 namespace ui {
  12
  13 namespace test {
  14 class MaterialDesignControllerTestAPI;
  15 }  // namespace test
  16
  17 // Central controller to handle material design modes.
  18 class UI_BASE_EXPORT MaterialDesignController {
  19  public:
  20   // The different material design modes. The order cannot be changed without
  21   // updating references as these are used as array indices.
  22   enum Mode {
  23     // Classic, non-material design.
  24     NON_MATERIAL = 0,
  25     // Basic material design.
  26     MATERIAL_NORMAL = 1,
  27     // Material design targeted at mouse/touch hybrid devices.
  28     MATERIAL_HYBRID = 2
  29   };
  30
  31   // Get the current Mode that should be used by the system.
  32   static Mode GetMode();
  33
  34   // Returns true if the current mode is a material design variant.
  35   static bool IsModeMaterial();
  36
  37  private:
  38   friend class test::MaterialDesignControllerTestAPI;
  39
  40   // Tracks whether |mode_| has been initialized. This is necessary so tests can
  41   // reset the state back to a clean state during tear down.
  42   static bool is_mode_initialized_;
  43
  44   // The current Mode to be used by the system.
  45   static Mode mode_;
  46
  47   // Declarations only. Do not allow construction of an object.
  48   MaterialDesignController();
  49   ~MaterialDesignController();
  50
  51   // Initializes |mode_|.
  52   static void InitializeMode();
  53
  54   // Resets the Mode state to uninitialized. To be used by tests to cleanup
  55   // global state.
  56   static void UninitializeMode();
  57
  58   // Set |mode_| to |mode| and updates |is_mode_initialized_| to true. Can be
  59   // used by tests to directly set the mode.
  60   static void SetMode(Mode mode);
  61
  62   DISALLOW_COPY_AND_ASSIGN(MaterialDesignController);
  63 };
  64
  65 }  // namespace ui
  66
  67 #endif  // UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_