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   eUXMediaRebar,
  24   eUXCommunicationsRebar,
  25   eUXBrowserTabBarRebar,
  26   eUXToolbar,
  27   eUXMediaToolbar,
  28   eUXCommunicationsToolbar,
  29   eUXProgress,
  30   eUXTab,
  31   eUXTrackbar,
  32   eUXSpin,
  33   eUXStatus,
  34   eUXCombobox,
  35   eUXHeader,
  36   eUXListview,
  37   eUXMenu,
  38   eUXWindowFrame,
  39   eUXNumClasses
  40 };
  41
  42 enum CmdButtonIdx {
  43   CMDBUTTONIDX_MINIMIZE = 0,
  44   CMDBUTTONIDX_RESTORE,
  45   CMDBUTTONIDX_CLOSE,
  46   CMDBUTTONIDX_BUTTONBOX
  47 };
  48
  49 class nsUXThemeData {
  50   // This class makes sure we don't attempt to open a theme if the previous
  51   // loading attempt has failed because OpenThemeData is a heavy task and
  52   // it's less likely that the API returns a different result.
  53   class ThemeHandle final {
  54     mozilla::Maybe<HANDLE> mHandle;
  55
  56    public:
  57     ThemeHandle() = default;
  58     ~ThemeHandle();
  59
  60     // Disallow copy and move
  61     ThemeHandle(const ThemeHandle&) = delete;
  62     ThemeHandle(ThemeHandle&&) = delete;
  63     ThemeHandle& operator=(const ThemeHandle&) = delete;
  64     ThemeHandle& operator=(ThemeHandle&&) = delete;
  65
  66     operator HANDLE();
  67     void OpenOnce(HWND aWindow, LPCWSTR aClassList);
  68     void Close();
  69   };
  70
  71   static ThemeHandle sThemes[eUXNumClasses];
  72
  73   // We initialize sCommandButtonBoxMetrics separately as a performance
  74   // optimization to avoid fetching dummy values for sCommandButtonMetrics
  75   // when we don't need those.
  76   static SIZE sCommandButtonMetrics[3];
  77   static bool sCommandButtonMetricsInitialized;
  78   static SIZE sCommandButtonBoxMetrics;
  79   static bool sCommandButtonBoxMetricsInitialized;
  80
  81   static const wchar_t* GetClassName(nsUXThemeClass);
  82   static void EnsureCommandButtonMetrics();
  83   static void EnsureCommandButtonBoxMetrics();
  84
  85  public:
  86   static bool sTitlebarInfoPopulatedAero;
  87   static bool sTitlebarInfoPopulatedThemed;
  88   static bool sIsDefaultWindowsTheme;
  89   static bool sIsHighContrastOn;
  90
  91   static void Invalidate();
  92   static HANDLE GetTheme(nsUXThemeClass cls);
  93   static HMODULE GetThemeDLL();
  94
  95   // nsWindow calls this to update desktop settings info
  96   static void UpdateTitlebarInfo(HWND aWnd);
  97
  98   static SIZE GetCommandButtonMetrics(CmdButtonIdx aMetric) {
  99     EnsureCommandButtonMetrics();
 100     return sCommandButtonMetrics[aMetric];
 101   }
 102   static SIZE GetCommandButtonBoxMetrics() {
 103     EnsureCommandButtonBoxMetrics();
 104     return sCommandButtonBoxMetrics;
 105   }
 106   static void UpdateNativeThemeInfo();
 107   static bool IsDefaultWindowTheme();
 108   static bool IsHighContrastOn();
 109
 110   static bool AreFlatMenusEnabled();
 111   static bool IsAppThemed();
 112 };
 113 #endif  // __UXThemeData_h__