Cleanup the tagged code

This CL removes the IPDF_Struct* classes in favour of their only implementation.
The tagged code was split out into files matching the classes they contain. The
friendship between CPDF_StructTree and CPDF_StructElement was broken in favour
of accessors.

Bug: pdfium:672
Change-Id: Iade83b608fb7168b3b0f41338d10d5fd8ab91a6e
Reviewed-on: https://pdfium-review.googlesource.com/3820
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/core/fpdfdoc/cpdf_structelement.h b/core/fpdfdoc/cpdf_structelement.h
new file mode 100644
index 0000000000..b227397431
--- /dev/null
+++ b/core/fpdfdoc/cpdf_structelement.h
@@ -0,0 +1,94 @@
+// Copyright 2017 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 CORE_FPDFDOC_CPDF_STRUCTELEMENT_H_
+#define CORE_FPDFDOC_CPDF_STRUCTELEMENT_H_
+
+#include <vector>
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/fx_string.h"
+#include "core/fxge/fx_dib.h"
+
+class CPDF_Dictionary;
+class CPDF_Object;
+class CPDF_StructElement;
+class CPDF_StructTree;
+
+class CPDF_StructKid {
+ public:
+  CPDF_StructKid();
+  CPDF_StructKid(const CPDF_StructKid& that);
+  ~CPDF_StructKid();
+
+  enum { Invalid, Element, PageContent, StreamContent, Object } m_Type;
+
+  CFX_RetainPtr<CPDF_StructElement> m_pElement;  // For Element.
+  CPDF_Dictionary* m_pDict;                      // For Element.
+  uint32_t m_PageObjNum;  // For PageContent, StreamContent, Object.
+  uint32_t m_RefObjNum;   // For StreamContent, Object.
+  uint32_t m_ContentId;   // For PageContent, StreamContent.
+};
+
+class CPDF_StructElement : public CFX_Retainable {
+ public:
+  template <typename T, typename... Args>
+  friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
+
+  CPDF_StructTree* GetTree() const { return m_pTree; }
+  const CFX_ByteString& GetType() const { return m_Type; }
+  CPDF_StructElement* GetParent() const { return m_pParent; }
+  CPDF_Dictionary* GetDict() const { return m_pDict; }
+
+  int CountKids() const;
+  CPDF_StructElement* GetKidIfElement(int index) const;
+  CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
+                       const CFX_ByteStringC& name,
+                       bool bInheritable = false,
+                       float fLevel = 0.0F);
+  CFX_ByteString GetName(const CFX_ByteStringC& owner,
+                         const CFX_ByteStringC& name,
+                         const CFX_ByteStringC& default_value,
+                         bool bInheritable = false,
+                         int subindex = -1);
+  FX_ARGB GetColor(const CFX_ByteStringC& owner,
+                   const CFX_ByteStringC& name,
+                   FX_ARGB default_value,
+                   bool bInheritable = false,
+                   int subindex = -1);
+  float GetNumber(const CFX_ByteStringC& owner,
+                  const CFX_ByteStringC& name,
+                  float default_value,
+                  bool bInheritable = false,
+                  int subindex = -1);
+  int GetInteger(const CFX_ByteStringC& owner,
+                 const CFX_ByteStringC& name,
+                 int default_value,
+                 bool bInheritable = false,
+                 int subindex = -1);
+
+  std::vector<CPDF_StructKid>* GetKids() { return &m_Kids; }
+  void LoadKids(CPDF_Dictionary* pDict);
+  void LoadKid(uint32_t PageObjNum, CPDF_Object* pObj, CPDF_StructKid* pKid);
+  CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
+                       const CFX_ByteStringC& name,
+                       bool bInheritable,
+                       int subindex);
+
+ private:
+  CPDF_StructElement(CPDF_StructTree* pTree,
+                     CPDF_StructElement* pParent,
+                     CPDF_Dictionary* pDict);
+  ~CPDF_StructElement() override;
+
+  CPDF_StructTree* const m_pTree;
+  CPDF_StructElement* const m_pParent;
+  CPDF_Dictionary* const m_pDict;
+  CFX_ByteString m_Type;
+  std::vector<CPDF_StructKid> m_Kids;
+};
+
+#endif  // CORE_FPDFDOC_CPDF_STRUCTELEMENT_H_