| // Copyright 2016 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_FPDFAPI_PAGE_CPDF_CONTENTPARSER_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_CONTENTPARSER_H_ |
| |
| #include <memory> |
| #include <set> |
| #include <vector> |
| |
| #include "core/fpdfapi/page/cpdf_streamcontentparser.h" |
| #include "core/fxcrt/fx_memory_wrappers.h" |
| #include "core/fxcrt/maybe_owned.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| |
| class CPDF_AllStates; |
| class CPDF_Array; |
| class CPDF_Form; |
| class CPDF_Page; |
| class CPDF_PageObjectHolder; |
| class CPDF_Stream; |
| class CPDF_StreamAcc; |
| class CPDF_Type3Char; |
| class PauseIndicatorIface; |
| |
| class CPDF_ContentParser { |
| public: |
| explicit CPDF_ContentParser(CPDF_Page* pPage); |
| CPDF_ContentParser(CPDF_Form* pForm, |
| const CPDF_AllStates* pGraphicStates, |
| const CFX_Matrix* pParentMatrix, |
| CPDF_Type3Char* pType3Char, |
| std::set<const uint8_t*>* pParsedSet); |
| ~CPDF_ContentParser(); |
| |
| const CPDF_AllStates* GetCurStates() const { |
| return m_pParser ? m_pParser->GetCurStates() : nullptr; |
| } |
| // Returns whether to continue or not. |
| bool Continue(PauseIndicatorIface* pPause); |
| |
| private: |
| enum class Stage : uint8_t { |
| kGetContent = 1, |
| kPrepareContent, |
| kParse, |
| kCheckClip, |
| kComplete, |
| }; |
| |
| Stage GetContent(); |
| Stage PrepareContent(); |
| Stage Parse(); |
| Stage CheckClip(); |
| |
| void HandlePageContentStream(CPDF_Stream* pStream); |
| bool HandlePageContentArray(CPDF_Array* pArray); |
| void HandlePageContentFailure(); |
| |
| Stage m_CurrentStage; |
| UnownedPtr<CPDF_PageObjectHolder> const m_pObjectHolder; |
| UnownedPtr<CPDF_Type3Char> m_pType3Char; // Only used when parsing forms. |
| RetainPtr<CPDF_StreamAcc> m_pSingleStream; |
| std::vector<RetainPtr<CPDF_StreamAcc>> m_StreamArray; |
| std::vector<uint32_t> m_StreamSegmentOffsets; |
| MaybeOwned<uint8_t, FxFreeDeleter> m_pData; |
| uint32_t m_nStreams = 0; |
| uint32_t m_Size = 0; |
| uint32_t m_CurrentOffset = 0; |
| |
| // Only used when parsing pages. |
| std::unique_ptr<std::set<const uint8_t*>> m_pParsedSet; |
| |
| // |m_pParser| has a reference to |m_pParsedSet|, so must be below and thus |
| // destroyed first. |
| std::unique_ptr<CPDF_StreamContentParser> m_pParser; |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_CONTENTPARSER_H_ |