widget/windows/nsUXThemeData.cpp

   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
   8 #include "mozilla/ArrayUtils.h"
   9 #include "mozilla/WindowsVersion.h"
  10
  11 #include "nsUXThemeData.h"
  12 #include "nsDebug.h"
  13 #include "nsToolkit.h"
  14 #include "nsUXThemeConstants.h"
  15 #include "gfxWindowsPlatform.h"
  16
  17 using namespace mozilla;
  18 using namespace mozilla::widget;
  19
  20 nsUXThemeData::ThemeHandle nsUXThemeData::sThemes[eUXNumClasses];
  21
  22 nsUXThemeData::ThemeHandle::~ThemeHandle() { Close(); }
  23
  24 void nsUXThemeData::ThemeHandle::OpenOnce(HWND aWindow, LPCWSTR aClassList) {
  25   if (mHandle.isSome()) {
  26     return;
  27   }
  28
  29   mHandle = Some(OpenThemeData(aWindow, aClassList));
  30 }
  31
  32 void nsUXThemeData::ThemeHandle::Close() {
  33   if (mHandle.isNothing()) {
  34     return;
  35   }
  36
  37   if (HANDLE rawHandle = mHandle.extract()) {
  38     CloseThemeData(rawHandle);
  39   }
  40 }
  41
  42 nsUXThemeData::ThemeHandle::operator HANDLE() {
  43   return mHandle.valueOr(nullptr);
  44 }
  45
  46 void nsUXThemeData::Invalidate() {
  47   for (auto& theme : sThemes) {
  48     theme.Close();
  49   }
  50 }
  51
  52 HANDLE
  53 nsUXThemeData::GetTheme(nsUXThemeClass cls) {
  54   NS_ASSERTION(cls < eUXNumClasses, "Invalid theme class!");
  55   sThemes[cls].OpenOnce(nullptr, GetClassName(cls));
  56   return sThemes[cls];
  57 }
  58
  59 const wchar_t* nsUXThemeData::GetClassName(nsUXThemeClass cls) {
  60   switch (cls) {
  61     case eUXButton:
  62       return L"Button";
  63     case eUXEdit:
  64       return L"Edit";
  65     case eUXToolbar:
  66       return L"Toolbar";
  67     case eUXProgress:
  68       return L"Progress";
  69     case eUXTab:
  70       return L"Tab";
  71     case eUXTrackbar:
  72       return L"Trackbar";
  73     case eUXCombobox:
  74       return L"Combobox";
  75     case eUXHeader:
  76       return L"Header";
  77     case eUXListview:
  78       return L"Listview";
  79     case eUXMenu:
  80       return L"Menu";
  81     default:
  82       MOZ_ASSERT_UNREACHABLE("unknown uxtheme class");
  83       return L"";
  84   }
  85 }
  86
  87 bool nsUXThemeData::sIsHighContrastOn = false;
  88
  89 // static
  90 void nsUXThemeData::UpdateNativeThemeInfo() {
  91   HIGHCONTRAST highContrastInfo;
  92   highContrastInfo.cbSize = sizeof(HIGHCONTRAST);
  93   sIsHighContrastOn =
  94       SystemParametersInfo(SPI_GETHIGHCONTRAST, 0, &highContrastInfo, 0) &&
  95       highContrastInfo.dwFlags & HCF_HIGHCONTRASTON;
  96 }