layout/style/PreferenceSheet.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* Some prefable colors for style system use */
   8
   9 #ifndef mozilla_ColorPreferences_h
  10 #define mozilla_ColorPreferences_h
  11
  12 #include "nsColor.h"
  13 #include "mozilla/ColorScheme.h"
  14
  15 namespace mozilla {
  16
  17 namespace dom {
  18 class Document;
  19 }
  20
  21 struct PreferenceSheet {
  22   struct Prefs {
  23     struct Colors {
  24       nscolor mLink = NS_RGB(0x00, 0x00, 0xEE);
  25       nscolor mActiveLink = NS_RGB(0xEE, 0x00, 0x00);
  26       nscolor mVisitedLink = NS_RGB(0x55, 0x1A, 0x8B);
  27
  28       nscolor mDefault = NS_RGB(0, 0, 0);
  29       nscolor mDefaultBackground = NS_RGB(0xFF, 0xFF, 0xFF);
  30     } mLightColors, mDarkColors;
  31
  32     const Colors& ColorsFor(ColorScheme aScheme) const {
  33       return mMustUseLightColorSet || aScheme == ColorScheme::Light
  34                  ? mLightColors
  35                  : mDarkColors;
  36     }
  37
  38     bool mIsChrome = false;
  39     bool mUseAccessibilityTheme = false;
  40     bool mUseDocumentColors = true;
  41     bool mUsePrefColors = false;
  42     bool mUseStandins = false;
  43     bool mMustUseLightColorSet = false;
  44     bool mMustUseLightSystemColors = false;
  45
  46     ColorScheme mColorScheme = ColorScheme::Light;
  47
  48     // Whether the non-native theme should use real system colors for widgets.
  49     bool NonNativeThemeShouldBeHighContrast() const;
  50
  51     void Load(bool aIsChrome);
  52     void LoadColors(bool aIsLight);
  53   };
  54
  55   static void EnsureInitialized() {
  56     if (sInitialized) {
  57       return;
  58     }
  59     Initialize();
  60   }
  61
  62   static void Refresh() {
  63     sInitialized = false;
  64     Initialize();
  65   }
  66
  67   static bool AffectedByPref(const nsACString&);
  68
  69   enum class ChromeColorSchemeSetting { Light, Dark, System };
  70   static ChromeColorSchemeSetting ColorSchemeSettingForChrome();
  71
  72   static ColorScheme ColorSchemeForChrome() {
  73     MOZ_ASSERT(sInitialized);
  74     return ChromePrefs().mColorScheme;
  75   }
  76
  77   static ColorScheme PreferredColorSchemeForContent() {
  78     MOZ_ASSERT(sInitialized);
  79     return ContentPrefs().mColorScheme;
  80   }
  81   static ColorScheme ThemeDerivedColorSchemeForContent();
  82
  83   static Prefs& ContentPrefs() {
  84     MOZ_ASSERT(sInitialized);
  85     return sContentPrefs;
  86   }
  87
  88   static Prefs& ChromePrefs() {
  89     MOZ_ASSERT(sInitialized);
  90     return sChromePrefs;
  91   }
  92
  93   static Prefs& PrintPrefs() {
  94     MOZ_ASSERT(sInitialized);
  95     return sPrintPrefs;
  96   }
  97
  98   enum class PrefsKind {
  99     Chrome,
 100     Print,
 101     Content,
 102   };
 103
 104   static PrefsKind PrefsKindFor(const dom::Document&);
 105
 106   static bool ShouldUseChromePrefs(const dom::Document& aDocument) {
 107     return PrefsKindFor(aDocument) == PrefsKind::Chrome;
 108   }
 109
 110   static bool MayForceColors() { return !ContentPrefs().mUseDocumentColors; }
 111
 112   static const Prefs& PrefsFor(const dom::Document& aDocument) {
 113     switch (PrefsKindFor(aDocument)) {
 114       case PrefsKind::Chrome:
 115         return ChromePrefs();
 116       case PrefsKind::Print:
 117         return PrintPrefs();
 118       case PrefsKind::Content:
 119         break;
 120     }
 121     return ContentPrefs();
 122   }
 123
 124  private:
 125   static bool sInitialized;
 126   static Prefs sChromePrefs;
 127   static Prefs sPrintPrefs;
 128   static Prefs sContentPrefs;
 129
 130   static void Initialize();
 131 };
 132
 133 }  // namespace mozilla
 134
 135 #endif