widget/nsXPLookAndFeel.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef __nsXPLookAndFeel
   7 #define __nsXPLookAndFeel
   8
   9 #include "mozilla/LookAndFeel.h"
  10 #include "nsTArray.h"
  11
  12 class nsLookAndFeel;
  13
  14 struct nsLookAndFeelIntPref
  15 {
  16   const char* name;
  17   mozilla::LookAndFeel::IntID id;
  18   bool isSet;
  19   int32_t intVar;
  20 };
  21
  22 struct nsLookAndFeelFloatPref
  23 {
  24   const char* name;
  25   mozilla::LookAndFeel::FloatID id;
  26   bool isSet;
  27   float floatVar;
  28 };
  29
  30 #define CACHE_BLOCK(x)     ((x) >> 5)
  31 #define CACHE_BIT(x)       (1 << ((x) & 31))
  32
  33 #define COLOR_CACHE_SIZE   (CACHE_BLOCK(LookAndFeel::eColorID_LAST_COLOR) + 1)
  34 #define IS_COLOR_CACHED(x) (CACHE_BIT(x) & nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)])
  35 #define CLEAR_COLOR_CACHE(x) nsXPLookAndFeel::sCachedColors[(x)] =0; \
  36               nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)] &= ~(CACHE_BIT(x));
  37 #define CACHE_COLOR(x, y)  nsXPLookAndFeel::sCachedColors[(x)] = y; \
  38               nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)] |= CACHE_BIT(x);
  39
  40 class nsXPLookAndFeel: public mozilla::LookAndFeel
  41 {
  42 public:
  43   virtual ~nsXPLookAndFeel();
  44
  45   static nsXPLookAndFeel* GetInstance();
  46   static void Shutdown();
  47
  48   void Init();
  49
  50   //
  51   // All these routines will return NS_OK if they have a value,
  52   // in which case the nsLookAndFeel should use that value;
  53   // otherwise we'll return NS_ERROR_NOT_AVAILABLE, in which case, the
  54   // platform-specific nsLookAndFeel should use its own values instead.
  55   //
  56   nsresult GetColorImpl(ColorID aID, bool aUseStandinsForNativeColors,
  57                         nscolor &aResult);
  58   virtual nsresult GetIntImpl(IntID aID, int32_t &aResult);
  59   virtual nsresult GetFloatImpl(FloatID aID, float &aResult);
  60
  61   // This one is different: there are no override prefs (fixme?), so
  62   // there is no XP implementation, only per-system impls.
  63   virtual bool GetFontImpl(FontID aID, nsString& aName,
  64                            gfxFontStyle& aStyle,
  65                            float aDevPixPerCSSPixel) = 0;
  66
  67   virtual void RefreshImpl();
  68
  69   virtual char16_t GetPasswordCharacterImpl()
  70   {
  71     return char16_t('*');
  72   }
  73
  74   virtual bool GetEchoPasswordImpl()
  75   {
  76     return false;
  77   }
  78
  79   virtual uint32_t GetPasswordMaskDelayImpl()
  80   {
  81     return 600;
  82   }
  83
  84   virtual nsTArray<LookAndFeelInt> GetIntCacheImpl();
  85   virtual void SetIntCacheImpl(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache) {}
  86
  87   virtual void NativeInit() = 0;
  88
  89 protected:
  90   nsXPLookAndFeel();
  91
  92   static void IntPrefChanged(nsLookAndFeelIntPref *data);
  93   static void FloatPrefChanged(nsLookAndFeelFloatPref *data);
  94   static void ColorPrefChanged(unsigned int index, const char *prefName);
  95   void InitFromPref(nsLookAndFeelIntPref* aPref);
  96   void InitFromPref(nsLookAndFeelFloatPref* aPref);
  97   void InitColorFromPref(int32_t aIndex);
  98   virtual nsresult NativeGetColor(ColorID aID, nscolor &aResult) = 0;
  99   bool IsSpecialColor(ColorID aID, nscolor &aColor);
 100   bool ColorIsNotCSSAccessible(ColorID aID);
 101   nscolor GetStandinForNativeColor(ColorID aID);
 102
 103   static void OnPrefChanged(const char* aPref, void* aClosure);
 104
 105   static bool sInitialized;
 106   static nsLookAndFeelIntPref sIntPrefs[];
 107   static nsLookAndFeelFloatPref sFloatPrefs[];
 108   /* this length must not be shorter than the length of the longest string in the array
 109    * see nsXPLookAndFeel.cpp
 110    */
 111   static const char sColorPrefs[][41];
 112   static int32_t sCachedColors[LookAndFeel::eColorID_LAST_COLOR];
 113   static int32_t sCachedColorBits[COLOR_CACHE_SIZE];
 114   static bool sUseNativeColors;
 115   static bool sUseStandinsForNativeColors;
 116   static bool sFindbarModalHighlight;
 117
 118   static nsXPLookAndFeel* sInstance;
 119   static bool sShutdown;
 120 };
 121
 122 #endif