Home | History | Annotate | Download | only in css
      1 // Copyright 2014 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef _FDE_CSSCACHE
      8 #define _FDE_CSSCACHE
      9 typedef struct _FDE_CSSCACHEITEM : public CFX_Target {
     10   _FDE_CSSCACHEITEM(IFDE_CSSStyleSheet* p);
     11   ~_FDE_CSSCACHEITEM();
     12   IFDE_CSSStyleSheet* pStylesheet;
     13   FX_DWORD dwActivity;
     14 } FDE_CSSCACHEITEM, *FDE_LPCSSCACHEITEM;
     15 class CFDE_CSSStyleSheetCache : public IFDE_CSSStyleSheetCache,
     16                                 public CFX_ThreadLock,
     17                                 public CFX_Target {
     18  public:
     19   CFDE_CSSStyleSheetCache();
     20   ~CFDE_CSSStyleSheetCache();
     21   virtual void Release() { delete this; }
     22 
     23   virtual void SetMaxItems(int32_t iMaxCount = 5) {
     24     FXSYS_assert(iMaxCount >= 3);
     25     m_iMaxItems = iMaxCount;
     26   }
     27 
     28   virtual void AddStyleSheet(const CFX_ByteStringC& szKey,
     29                              IFDE_CSSStyleSheet* pStyleSheet);
     30   virtual IFDE_CSSStyleSheet* GetStyleSheet(const CFX_ByteStringC& szKey) const;
     31   virtual void RemoveStyleSheet(const CFX_ByteStringC& szKey);
     32 
     33  protected:
     34   void RemoveLowestActivityItem();
     35   std::map<CFX_ByteString, FDE_LPCSSCACHEITEM> m_Stylesheets;
     36   IFX_MEMAllocator* m_pFixedStore;
     37   int32_t m_iMaxItems;
     38 };
     39 typedef struct _FDE_CSSTAGCACHE : public CFX_Target {
     40  public:
     41   _FDE_CSSTAGCACHE(_FDE_CSSTAGCACHE* parent, IFDE_CSSTagProvider* tag);
     42   _FDE_CSSTAGCACHE(const _FDE_CSSTAGCACHE& it);
     43   _FDE_CSSTAGCACHE* GetParent() const { return pParent; }
     44   IFDE_CSSTagProvider* GetTag() const { return pTag; }
     45   FX_DWORD HashID() const { return dwIDHash; }
     46   FX_DWORD HashTag() const { return dwTagHash; }
     47   int32_t CountHashClass() const { return dwClassHashs.GetSize(); }
     48   void SetClassIndex(int32_t index) { iClassIndex = index; }
     49   FX_DWORD HashClass() const {
     50     return iClassIndex < dwClassHashs.GetSize()
     51                ? dwClassHashs.GetAt(iClassIndex)
     52                : 0;
     53   }
     54 
     55  protected:
     56   IFDE_CSSTagProvider* pTag;
     57   _FDE_CSSTAGCACHE* pParent;
     58   FX_DWORD dwIDHash;
     59   FX_DWORD dwTagHash;
     60   int32_t iClassIndex;
     61   CFDE_DWordArray dwClassHashs;
     62 } FDE_CSSTAGCACHE, *FDE_LPCSSTAGCACHE;
     63 typedef CFX_ObjectStackTemplate<FDE_CSSTAGCACHE> CFDE_CSSTagStack;
     64 class CFDE_CSSAccelerator : public IFDE_CSSAccelerator, public CFX_Target {
     65  public:
     66   virtual void OnEnterTag(IFDE_CSSTagProvider* pTag);
     67   virtual void OnLeaveTag(IFDE_CSSTagProvider* pTag);
     68   void Clear() { m_Stack.RemoveAll(); }
     69   FDE_LPCSSTAGCACHE GetTopElement() const { return m_Stack.GetTopElement(); }
     70 
     71  protected:
     72   CFDE_CSSTagStack m_Stack;
     73 };
     74 #endif
     75