1 files changed, 84 insertions, 0 deletions
diff --git a/xfa/src/fde/css/fde_csscache.h b/xfa/src/fde/css/fde_csscache.h
new file mode 100644
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+++ b/xfa/src/fde/css/fde_csscache.h
@@ -0,0 +1,84 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_SRC_FDE_CSS_FDE_CSSCACHE_H_
+#define XFA_SRC_FDE_CSS_FDE_CSSCACHE_H_
+
+#include <map>
+
+#include "xfa/src/fde/css/fde_css.h"
+#include "xfa/src/fgas/crt/fgas_memory.h"
+
+struct FDE_CSSCACHEITEM : public CFX_Target {
+  FDE_CSSCACHEITEM(IFDE_CSSStyleSheet* p);
+  ~FDE_CSSCACHEITEM();
+
+  IFDE_CSSStyleSheet* pStylesheet;
+  FX_DWORD dwActivity;
+};
+
+class CFDE_CSSStyleSheetCache : public IFDE_CSSStyleSheetCache,
+                                public CFX_Target {
+ public:
+  CFDE_CSSStyleSheetCache();
+  ~CFDE_CSSStyleSheetCache();
+  virtual void Release() { delete this; }
+
+  virtual void SetMaxItems(int32_t iMaxCount = 5) {
+    FXSYS_assert(iMaxCount >= 3);
+    m_iMaxItems = iMaxCount;
+  }
+
+  virtual void AddStyleSheet(const CFX_ByteStringC& szKey,
+                             IFDE_CSSStyleSheet* pStyleSheet);
+  virtual IFDE_CSSStyleSheet* GetStyleSheet(const CFX_ByteStringC& szKey) const;
+  virtual void RemoveStyleSheet(const CFX_ByteStringC& szKey);
+
+ protected:
+  void RemoveLowestActivityItem();
+  std::map<CFX_ByteString, FDE_CSSCACHEITEM*> m_Stylesheets;
+  IFX_MEMAllocator* m_pFixedStore;
+  int32_t m_iMaxItems;
+};
+
+struct FDE_CSSTAGCACHE : public CFX_Target {
+ public:
+  FDE_CSSTAGCACHE(FDE_CSSTAGCACHE* parent, IFDE_CSSTagProvider* tag);
+  FDE_CSSTAGCACHE(const FDE_CSSTAGCACHE& it);
+  FDE_CSSTAGCACHE* GetParent() const { return pParent; }
+  IFDE_CSSTagProvider* GetTag() const { return pTag; }
+  FX_DWORD HashID() const { return dwIDHash; }
+  FX_DWORD HashTag() const { return dwTagHash; }
+  int32_t CountHashClass() const { return dwClassHashs.GetSize(); }
+  void SetClassIndex(int32_t index) { iClassIndex = index; }
+  FX_DWORD HashClass() const {
+    return iClassIndex < dwClassHashs.GetSize()
+               ? dwClassHashs.GetAt(iClassIndex)
+               : 0;
+  }
+
+ protected:
+  IFDE_CSSTagProvider* pTag;
+  FDE_CSSTAGCACHE* pParent;
+  FX_DWORD dwIDHash;
+  FX_DWORD dwTagHash;
+  int32_t iClassIndex;
+  CFDE_DWordArray dwClassHashs;
+};
+typedef CFX_ObjectStackTemplate<FDE_CSSTAGCACHE> CFDE_CSSTagStack;
+
+class CFDE_CSSAccelerator : public IFDE_CSSAccelerator, public CFX_Target {
+ public:
+  virtual void OnEnterTag(IFDE_CSSTagProvider* pTag);
+  virtual void OnLeaveTag(IFDE_CSSTagProvider* pTag);
+  void Clear() { m_Stack.RemoveAll(); }
+  FDE_CSSTAGCACHE* GetTopElement() const { return m_Stack.GetTopElement(); }
+
+ protected:
+  CFDE_CSSTagStack m_Stack;
+};
+
+#endif  // XFA_SRC_FDE_CSS_FDE_CSSCACHE_H_