widget/windows/nsUXThemeData.h

   1 /* vim: se cin sw=2 ts=2 et : */
   2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7 #ifndef __UXThemeData_h__
   8 #define __UXThemeData_h__
   9 #include <windows.h>
  10 #include <uxtheme.h>
  11
  12 #include "nscore.h"
  13 #include "mozilla/LookAndFeel.h"
  14 #include "mozilla/Maybe.h"
  15 #include "WinUtils.h"
  16
  17 #include "nsWindowDefs.h"
  18
  19 enum nsUXThemeClass {
  20   eUXButton = 0,
  21   eUXEdit,
  22   eUXToolbar,
  23   eUXProgress,
  24   eUXTab,
  25   eUXTrackbar,
  26   eUXCombobox,
  27   eUXHeader,
  28   eUXListview,
  29   eUXMenu,
  30   eUXNumClasses
  31 };
  32
  33 class nsUXThemeData {
  34   // This class makes sure we don't attempt to open a theme if the previous
  35   // loading attempt has failed because OpenThemeData is a heavy task and
  36   // it's less likely that the API returns a different result.
  37   class ThemeHandle final {
  38     mozilla::Maybe<HANDLE> mHandle;
  39
  40    public:
  41     ThemeHandle() = default;
  42     ~ThemeHandle();
  43
  44     // Disallow copy and move
  45     ThemeHandle(const ThemeHandle&) = delete;
  46     ThemeHandle(ThemeHandle&&) = delete;
  47     ThemeHandle& operator=(const ThemeHandle&) = delete;
  48     ThemeHandle& operator=(ThemeHandle&&) = delete;
  49
  50     operator HANDLE();
  51     void OpenOnce(HWND aWindow, LPCWSTR aClassList);
  52     void Close();
  53   };
  54
  55   static ThemeHandle sThemes[eUXNumClasses];
  56   static const wchar_t* GetClassName(nsUXThemeClass);
  57
  58  public:
  59   static bool sIsHighContrastOn;
  60
  61   static void Invalidate();
  62   static HANDLE GetTheme(nsUXThemeClass cls);
  63   static HMODULE GetThemeDLL();
  64
  65   static void UpdateNativeThemeInfo();
  66   static bool IsHighContrastOn() { return sIsHighContrastOn; }
  67 };
  68 #endif  // __UXThemeData_h__