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
  11 class nsLookAndFeel;
  12
  13 struct nsLookAndFeelIntPref
  14 {
  15   const char* name;
  16   mozilla::LookAndFeel::IntID id;
  17   bool isSet;
  18   int32_t intVar;
  19 };
  20
  21 struct nsLookAndFeelFloatPref
  22 {
  23   const char* name;
  24   mozilla::LookAndFeel::FloatID id;
  25   bool isSet;
  26   float floatVar;
  27 };
  28
  29 #define CACHE_BLOCK(x)     ((x) >> 5)
  30 #define CACHE_BIT(x)       (1 << ((x) & 31))
  31
  32 #define COLOR_CACHE_SIZE   (CACHE_BLOCK(LookAndFeel::eColorID_LAST_COLOR) + 1)
  33 #define IS_COLOR_CACHED(x) (CACHE_BIT(x) & nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)])
  34 #define CLEAR_COLOR_CACHE(x) nsXPLookAndFeel::sCachedColors[(x)] =0; \
  35               nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)] &= ~(CACHE_BIT(x));
  36 #define CACHE_COLOR(x, y)  nsXPLookAndFeel::sCachedColors[(x)] = y; \
  37               nsXPLookAndFeel::sCachedColorBits[CACHE_BLOCK(x)] |= CACHE_BIT(x);
  38
  39 class nsXPLookAndFeel: public mozilla::LookAndFeel
  40 {
  41 public:
  42   virtual ~nsXPLookAndFeel();
  43
  44   static nsLookAndFeel* GetInstance();
  45   static void Shutdown();
  46
  47   void Init();
  48
  49   //
  50   // All these routines will return NS_OK if they have a value,
  51   // in which case the nsLookAndFeel should use that value;
  52   // otherwise we'll return NS_ERROR_NOT_AVAILABLE, in which case, the
  53   // platform-specific nsLookAndFeel should use its own values instead.
  54   //
  55   nsresult GetColorImpl(ColorID aID, nscolor &aResult);
  56   virtual nsresult GetIntImpl(IntID aID, int32_t &aResult);
  57   virtual nsresult GetFloatImpl(FloatID aID, float &aResult);
  58
  59   // This one is different: there are no override prefs (fixme?), so
  60   // there is no XP implementation, only per-system impls.
  61   virtual bool GetFontImpl(FontID aID, nsString& aName,
  62                            gfxFontStyle& aStyle,
  63                            float aDevPixPerCSSPixel) = 0;
  64
  65   virtual void RefreshImpl();
  66
  67   virtual char16_t GetPasswordCharacterImpl()
  68   {
  69     return char16_t('*');
  70   }
  71
  72   virtual bool GetEchoPasswordImpl()
  73   {
  74     return false;
  75   }
  76
  77   virtual uint32_t GetPasswordMaskDelayImpl()
  78   {
  79     return 600;
  80   }
  81
  82 protected:
  83   nsXPLookAndFeel();
  84
  85   static void IntPrefChanged(nsLookAndFeelIntPref *data);
  86   static void FloatPrefChanged(nsLookAndFeelFloatPref *data);
  87   static void ColorPrefChanged(unsigned int index, const char *prefName);
  88   void InitFromPref(nsLookAndFeelIntPref* aPref);
  89   void InitFromPref(nsLookAndFeelFloatPref* aPref);
  90   void InitColorFromPref(int32_t aIndex);
  91   virtual nsresult NativeGetColor(ColorID aID, nscolor &aResult) = 0;
  92   bool IsSpecialColor(ColorID aID, nscolor &aColor);
  93
  94   static void OnPrefChanged(const char* aPref, void* aClosure);
  95
  96   static bool sInitialized;
  97   static nsLookAndFeelIntPref sIntPrefs[];
  98   static nsLookAndFeelFloatPref sFloatPrefs[];
  99   /* this length must not be shorter than the length of the longest string in the array
 100    * see nsXPLookAndFeel.cpp
 101    */
 102   static const char sColorPrefs[][38];
 103   static int32_t sCachedColors[LookAndFeel::eColorID_LAST_COLOR];
 104   static int32_t sCachedColorBits[COLOR_CACHE_SIZE];
 105   static bool sUseNativeColors;
 106
 107   static nsLookAndFeel* sInstance;
 108   static bool sShutdown;
 109 };
 110
 111 #endif