source/libs/poppler/poppler-src/poppler/PopplerCache.h

   1 //========================================================================
   2 //
   3 // PopplerCache.h
   4 //
   5 // This file is licensed under the GPLv2 or later
   6 //
   7 // Copyright (C) 2009 Koji Otani <sho@bbr.jp>
   8 // Copyright (C) 2009, 2010 Albert Astals Cid <aacid@kde.org>
   9 // Copyright (C) 2010 Carlos Garcia Campos <carlosgc@gnome.org>
  10 //
  11 //========================================================================
  12
  13 #ifndef POPPLER_CACHE_H
  14 #define POPPLER_CACHE_H
  15
  16 #include "Object.h"
  17
  18 class PopplerCacheItem
  19 {
  20   public:
  21    virtual ~PopplerCacheItem();
  22 };
  23
  24 class PopplerCacheKey
  25 {
  26   public:
  27     virtual ~PopplerCacheKey();
  28     virtual bool operator==(const PopplerCacheKey &key) const = 0;
  29 };
  30
  31 class PopplerCache
  32 {
  33   public:
  34     PopplerCache(int cacheSizeA);
  35     ~PopplerCache();
  36
  37     /* The item returned is owned by the cache */
  38     PopplerCacheItem *lookup(const PopplerCacheKey &key);
  39
  40     /* The key and item pointers ownership is taken by the cache */
  41     void put(PopplerCacheKey *key, PopplerCacheItem *item);
  42
  43     /* The max size of the cache */
  44     int size();
  45
  46     /* The number of items in the cache */
  47     int numberOfItems();
  48
  49     /* The n-th item in the cache */
  50     PopplerCacheItem *item(int index);
  51
  52     /* The n-th key in the cache */
  53     PopplerCacheKey *key(int index);
  54
  55   private:
  56     PopplerCache(const PopplerCache &cache); // not allowed
  57
  58     PopplerCacheKey **keys;
  59     PopplerCacheItem **items;
  60     int lastValidCacheIndex;
  61     int cacheSize;
  62 };
  63
  64 class PopplerObjectCache
  65 {
  66   public:
  67     PopplerObjectCache (int cacheSizeA, XRef *xrefA);
  68     ~PopplerObjectCache();
  69
  70     Object *put(const Ref &ref);
  71     Object *lookup(const Ref &ref, Object *obj);
  72
  73   private:
  74     XRef *xref;
  75     PopplerCache *cache;
  76 };
  77
  78 #endif