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diff --git a/xfa/fde/css/cfde_cssdeclaration.h b/xfa/fde/css/cfde_cssdeclaration.h
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+++ b/xfa/fde/css/cfde_cssdeclaration.h
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+// 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_FDE_CSS_CFDE_CSSDECLARATION_H_
+#define XFA_FDE_CSS_CFDE_CSSDECLARATION_H_
+
+#include <memory>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+#include "xfa/fde/css/fde_cssdatatable.h"
+
+struct FDE_CSSPropertyArgs {
+  std::unordered_map<uint32_t, FX_WCHAR*>* pStringCache;
+  const FDE_CSSPropertyTable* pProperty;
+};
+
+class CFDE_CSSPropertyHolder;
+class CFDE_CSSCustomProperty;
+
+class CFDE_CSSDeclaration {
+ public:
+  using const_prop_iterator =
+      std::vector<std::unique_ptr<CFDE_CSSPropertyHolder>>::const_iterator;
+  using const_custom_iterator =
+      std::vector<std::unique_ptr<CFDE_CSSCustomProperty>>::const_iterator;
+
+  static bool ParseCSSString(const FX_WCHAR* pszValue,
+                             int32_t iValueLen,
+                             int32_t* iOffset,
+                             int32_t* iLength);
+  static bool ParseCSSColor(const FX_WCHAR* pszValue,
+                            int32_t iValueLen,
+                            FX_ARGB* dwColor);
+
+  CFDE_CSSDeclaration();
+  ~CFDE_CSSDeclaration();
+
+  CFDE_CSSValue* GetProperty(FDE_CSSProperty eProperty, bool& bImportant) const;
+
+  const_prop_iterator begin() const { return properties_.begin(); }
+  const_prop_iterator end() const { return properties_.end(); }
+
+  const_custom_iterator custom_begin() const {
+    return custom_properties_.begin();
+  }
+  const_custom_iterator custom_end() const { return custom_properties_.end(); }
+
+  bool empty() const { return properties_.empty(); }
+
+  void AddProperty(const FDE_CSSPropertyArgs* pArgs,
+                   const FX_WCHAR* pszValue,
+                   int32_t iValueLen);
+  void AddProperty(const FDE_CSSPropertyArgs* pArgs,
+                   const FX_WCHAR* pszName,
+                   int32_t iNameLen,
+                   const FX_WCHAR* pszValue,
+                   int32_t iValueLen);
+
+  size_t PropertyCountForTesting() const;
+
+  FX_ARGB ParseColorForTest(const FX_WCHAR* pszValue,
+                            int32_t iValueLen,
+                            FX_ARGB* dwColor) const;
+
+ private:
+  void ParseFontProperty(const FDE_CSSPropertyArgs* pArgs,
+                         const FX_WCHAR* pszValue,
+                         int32_t iValueLen,
+                         bool bImportant);
+  bool ParseBorderProperty(const FX_WCHAR* pszValue,
+                           int32_t iValueLen,
+                           CFX_RetainPtr<CFDE_CSSValue>& pWidth) const;
+  void ParseValueListProperty(const FDE_CSSPropertyArgs* pArgs,
+                              const FX_WCHAR* pszValue,
+                              int32_t iValueLen,
+                              bool bImportant);
+  void Add4ValuesProperty(const std::vector<CFX_RetainPtr<CFDE_CSSValue>>& list,
+                          bool bImportant,
+                          FDE_CSSProperty eLeft,
+                          FDE_CSSProperty eTop,
+                          FDE_CSSProperty eRight,
+                          FDE_CSSProperty eBottom);
+  CFX_RetainPtr<CFDE_CSSValue> ParseNumber(const FDE_CSSPropertyArgs* pArgs,
+                                           const FX_WCHAR* pszValue,
+                                           int32_t iValueLen);
+  CFX_RetainPtr<CFDE_CSSValue> ParseEnum(const FDE_CSSPropertyArgs* pArgs,
+                                         const FX_WCHAR* pszValue,
+                                         int32_t iValueLen);
+  CFX_RetainPtr<CFDE_CSSValue> ParseColor(const FDE_CSSPropertyArgs* pArgs,
+                                          const FX_WCHAR* pszValue,
+                                          int32_t iValueLen);
+  CFX_RetainPtr<CFDE_CSSValue> ParseString(const FDE_CSSPropertyArgs* pArgs,
+                                           const FX_WCHAR* pszValue,
+                                           int32_t iValueLen);
+  const FX_WCHAR* CopyToLocal(const FDE_CSSPropertyArgs* pArgs,
+                              const FX_WCHAR* pszValue,
+                              int32_t iValueLen);
+  void AddPropertyHolder(FDE_CSSProperty eProperty,
+                         CFX_RetainPtr<CFDE_CSSValue> pValue,
+                         bool bImportant);
+
+  std::vector<std::unique_ptr<CFDE_CSSPropertyHolder>> properties_;
+  std::vector<std::unique_ptr<CFDE_CSSCustomProperty>> custom_properties_;
+};
+
+#endif  // XFA_FDE_CSS_CFDE_CSSDECLARATION_H_