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   eUXRebar,
  23   eUXToolbar,
  24   eUXProgress,
  25   eUXTab,
  26   eUXTrackbar,
  27   eUXCombobox,
  28   eUXHeader,
  29   eUXListview,
  30   eUXMenu,
  31   eUXNumClasses
  32 };
  33
  34 class nsUXThemeData {
  35   // This class makes sure we don't attempt to open a theme if the previous
  36   // loading attempt has failed because OpenThemeData is a heavy task and
  37   // it's less likely that the API returns a different result.
  38   class ThemeHandle final {
  39     mozilla::Maybe<HANDLE> mHandle;
  40
  41    public:
  42     ThemeHandle() = default;
  43     ~ThemeHandle();
  44
  45     // Disallow copy and move
  46     ThemeHandle(const ThemeHandle&) = delete;
  47     ThemeHandle(ThemeHandle&&) = delete;
  48     ThemeHandle& operator=(const ThemeHandle&) = delete;
  49     ThemeHandle& operator=(ThemeHandle&&) = delete;
  50
  51     operator HANDLE();
  52     void OpenOnce(HWND aWindow, LPCWSTR aClassList);
  53     void Close();
  54   };
  55
  56   static ThemeHandle sThemes[eUXNumClasses];
  57   static const wchar_t* GetClassName(nsUXThemeClass);
  58
  59  public:
  60   static bool sIsHighContrastOn;
  61
  62   static void Invalidate();
  63   static HANDLE GetTheme(nsUXThemeClass cls);
  64   static HMODULE GetThemeDLL();
  65
  66   static void UpdateNativeThemeInfo();
  67   static bool IsHighContrastOn() { return sIsHighContrastOn; }
  68 };
  69 #endif  // __UXThemeData_h__