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Unified Diff: core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp

Issue 2392603004: Move core/fpdfapi/fpdf_parser to core/fpdfapi/parser (Closed)
Patch Set: Rebase to master Created 4 years, 2 months ago
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Index: core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp
diff --git a/core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp b/core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp
deleted file mode 100644
index 9afe4e5f13a5e82f256157dd3de5a5e17c8bd833..0000000000000000000000000000000000000000
--- a/core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp
+++ /dev/null
@@ -1,1844 +0,0 @@
-// 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
-
-#include "core/fpdfapi/fpdf_parser/cpdf_data_avail.h"
-
-#include <algorithm>
-#include <memory>
-#include <utility>
-
-#include "core/fpdfapi/cpdf_modulemgr.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_document.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_hint_tables.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_name.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_number.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_reference.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_stream.h"
-#include "core/fpdfapi/fpdf_parser/fpdf_parser_utility.h"
-#include "core/fxcrt/fx_ext.h"
-#include "core/fxcrt/fx_safe_types.h"
-#include "third_party/base/stl_util.h"
-
-CPDF_DataAvail::FileAvail::~FileAvail() {}
-
-CPDF_DataAvail::DownloadHints::~DownloadHints() {}
-
-// static
-int CPDF_DataAvail::s_CurrentDataAvailRecursionDepth = 0;
-
-CPDF_DataAvail::CPDF_DataAvail(FileAvail* pFileAvail,
- IFX_FileRead* pFileRead,
- FX_BOOL bSupportHintTable)
- : m_pFileAvail(pFileAvail), m_pFileRead(pFileRead) {
- m_Pos = 0;
- m_dwFileLen = 0;
- if (m_pFileRead) {
- m_dwFileLen = (uint32_t)m_pFileRead->GetSize();
- }
- m_dwCurrentOffset = 0;
- m_dwXRefOffset = 0;
- m_bufferOffset = 0;
- m_dwFirstPageNo = 0;
- m_bufferSize = 0;
- m_PagesObjNum = 0;
- m_dwCurrentXRefSteam = 0;
- m_dwAcroFormObjNum = 0;
- m_dwInfoObjNum = 0;
- m_pDocument = 0;
- m_dwEncryptObjNum = 0;
- m_dwPrevXRefOffset = 0;
- m_dwLastXRefOffset = 0;
- m_bDocAvail = FALSE;
- m_bMainXRefLoadTried = FALSE;
- m_bDocAvail = FALSE;
- m_bLinearized = FALSE;
- m_bPagesLoad = FALSE;
- m_bPagesTreeLoad = FALSE;
- m_bMainXRefLoadedOK = FALSE;
- m_bAnnotsLoad = FALSE;
- m_bHaveAcroForm = FALSE;
- m_bAcroFormLoad = FALSE;
- m_bPageLoadedOK = FALSE;
- m_bNeedDownLoadResource = FALSE;
- m_bLinearizedFormParamLoad = FALSE;
- m_pLinearized = nullptr;
- m_pRoot = nullptr;
- m_pTrailer = nullptr;
- m_pCurrentParser = nullptr;
- m_pAcroForm = nullptr;
- m_pPageDict = nullptr;
- m_pPageResource = nullptr;
- m_docStatus = PDF_DATAAVAIL_HEADER;
- m_parser.m_bOwnFileRead = false;
- m_bTotalLoadPageTree = FALSE;
- m_bCurPageDictLoadOK = FALSE;
- m_bLinearedDataOK = FALSE;
- m_bSupportHintTable = bSupportHintTable;
-}
-CPDF_DataAvail::~CPDF_DataAvail() {
- m_pHintTables.reset();
- if (m_pLinearized)
- m_pLinearized->Release();
-
- if (m_pRoot)
- m_pRoot->Release();
-
- if (m_pTrailer)
- m_pTrailer->Release();
-
- int iSize = m_arrayAcroforms.GetSize();
- for (int i = 0; i < iSize; ++i)
- m_arrayAcroforms.GetAt(i)->Release();
-}
-
-void CPDF_DataAvail::SetDocument(CPDF_Document* pDoc) {
- m_pDocument = pDoc;
-}
-
-uint32_t CPDF_DataAvail::GetObjectSize(uint32_t objnum, FX_FILESIZE& offset) {
- CPDF_Parser* pParser = m_pDocument->GetParser();
- if (!pParser || !pParser->IsValidObjectNumber(objnum))
- return 0;
-
- if (pParser->GetObjectType(objnum) == 2)
- objnum = pParser->GetObjectPositionOrZero(objnum);
-
- if (pParser->GetObjectType(objnum) != 1 &&
- pParser->GetObjectType(objnum) != 255) {
- return 0;
- }
-
- offset = pParser->GetObjectPositionOrZero(objnum);
- if (offset == 0)
- return 0;
-
- auto it = pParser->m_SortedOffset.find(offset);
- if (it == pParser->m_SortedOffset.end() ||
- ++it == pParser->m_SortedOffset.end()) {
- return 0;
- }
- return *it - offset;
-}
-
-FX_BOOL CPDF_DataAvail::IsObjectsAvail(
- CFX_ArrayTemplate<CPDF_Object*>& obj_array,
- FX_BOOL bParsePage,
- DownloadHints* pHints,
- CFX_ArrayTemplate<CPDF_Object*>& ret_array) {
- if (!obj_array.GetSize())
- return TRUE;
-
- uint32_t count = 0;
- CFX_ArrayTemplate<CPDF_Object*> new_obj_array;
- for (int i = 0; i < obj_array.GetSize(); i++) {
- CPDF_Object* pObj = obj_array[i];
- if (!pObj)
- continue;
-
- int32_t type = pObj->GetType();
- switch (type) {
- case CPDF_Object::ARRAY: {
- CPDF_Array* pArray = pObj->AsArray();
- for (size_t k = 0; k < pArray->GetCount(); ++k)
- new_obj_array.Add(pArray->GetObjectAt(k));
- } break;
- case CPDF_Object::STREAM:
- pObj = pObj->GetDict();
- case CPDF_Object::DICTIONARY: {
- CPDF_Dictionary* pDict = pObj->GetDict();
- if (pDict && pDict->GetStringFor("Type") == "Page" && !bParsePage)
- continue;
-
- for (const auto& it : *pDict) {
- const CFX_ByteString& key = it.first;
- CPDF_Object* value = it.second;
- if (key != "Parent")
- new_obj_array.Add(value);
- }
- } break;
- case CPDF_Object::REFERENCE: {
- CPDF_Reference* pRef = pObj->AsReference();
- uint32_t dwNum = pRef->GetRefObjNum();
-
- FX_FILESIZE offset;
- uint32_t size = GetObjectSize(dwNum, offset);
- if (size == 0 || offset < 0 || offset >= m_dwFileLen)
- break;
-
- if (!IsDataAvail(offset, size, pHints)) {
- ret_array.Add(pObj);
- count++;
- } else if (!pdfium::ContainsKey(m_ObjectSet, dwNum)) {
- m_ObjectSet.insert(dwNum);
- CPDF_Object* pReferred =
- m_pDocument->GetOrParseIndirectObject(pRef->GetRefObjNum());
- if (pReferred)
- new_obj_array.Add(pReferred);
- }
- } break;
- }
- }
-
- if (count > 0) {
- for (int i = 0; i < new_obj_array.GetSize(); ++i) {
- CPDF_Object* pObj = new_obj_array[i];
- if (CPDF_Reference* pRef = pObj->AsReference()) {
- uint32_t dwNum = pRef->GetRefObjNum();
- if (!pdfium::ContainsKey(m_ObjectSet, dwNum))
- ret_array.Add(pObj);
- } else {
- ret_array.Add(pObj);
- }
- }
- return FALSE;
- }
-
- obj_array.RemoveAll();
- obj_array.Append(new_obj_array);
- return IsObjectsAvail(obj_array, FALSE, pHints, ret_array);
-}
-
-CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsDocAvail(
- DownloadHints* pHints) {
- if (!m_dwFileLen && m_pFileRead) {
- m_dwFileLen = (uint32_t)m_pFileRead->GetSize();
- if (!m_dwFileLen)
- return DataError;
- }
-
- while (!m_bDocAvail) {
- if (!CheckDocStatus(pHints))
- return DataNotAvailable;
- }
-
- return DataAvailable;
-}
-
-FX_BOOL CPDF_DataAvail::CheckAcroFormSubObject(DownloadHints* pHints) {
- if (!m_objs_array.GetSize()) {
- m_objs_array.RemoveAll();
- m_ObjectSet.clear();
- CFX_ArrayTemplate<CPDF_Object*> obj_array;
- obj_array.Append(m_arrayAcroforms);
- FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
- if (bRet)
- m_objs_array.RemoveAll();
- return bRet;
- }
-
- CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
- FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
- if (bRet) {
- int32_t iSize = m_arrayAcroforms.GetSize();
- for (int32_t i = 0; i < iSize; ++i) {
- m_arrayAcroforms.GetAt(i)->Release();
- }
- m_arrayAcroforms.RemoveAll();
- } else {
- m_objs_array.RemoveAll();
- m_objs_array.Append(new_objs_array);
- }
- return bRet;
-}
-
-FX_BOOL CPDF_DataAvail::CheckAcroForm(DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- m_pAcroForm = GetObject(m_dwAcroFormObjNum, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_PAGETREE;
- return TRUE;
- }
-
- if (!m_pAcroForm) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
- return FALSE;
- }
-
- m_arrayAcroforms.Add(m_pAcroForm);
- m_docStatus = PDF_DATAAVAIL_PAGETREE;
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckDocStatus(DownloadHints* pHints) {
- switch (m_docStatus) {
- case PDF_DATAAVAIL_HEADER:
- return CheckHeader(pHints);
- case PDF_DATAAVAIL_FIRSTPAGE:
- case PDF_DATAAVAIL_FIRSTPAGE_PREPARE:
- return CheckFirstPage(pHints);
- case PDF_DATAAVAIL_HINTTABLE:
- return CheckHintTables(pHints);
- case PDF_DATAAVAIL_END:
- return CheckEnd(pHints);
- case PDF_DATAAVAIL_CROSSREF:
- return CheckCrossRef(pHints);
- case PDF_DATAAVAIL_CROSSREF_ITEM:
- return CheckCrossRefItem(pHints);
- case PDF_DATAAVAIL_CROSSREF_STREAM:
- return CheckAllCrossRefStream(pHints);
- case PDF_DATAAVAIL_TRAILER:
- return CheckTrailer(pHints);
- case PDF_DATAAVAIL_TRAILER_APPEND:
- return CheckTrailerAppend(pHints);
- case PDF_DATAAVAIL_LOADALLCROSSREF:
- return LoadAllXref(pHints);
- case PDF_DATAAVAIL_LOADALLFILE:
- return LoadAllFile(pHints);
- case PDF_DATAAVAIL_ROOT:
- return CheckRoot(pHints);
- case PDF_DATAAVAIL_INFO:
- return CheckInfo(pHints);
- case PDF_DATAAVAIL_ACROFORM:
- return CheckAcroForm(pHints);
- case PDF_DATAAVAIL_PAGETREE:
- if (m_bTotalLoadPageTree)
- return CheckPages(pHints);
- return LoadDocPages(pHints);
- case PDF_DATAAVAIL_PAGE:
- if (m_bTotalLoadPageTree)
- return CheckPage(pHints);
- m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
- return TRUE;
- case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
- case PDF_DATAAVAIL_PAGE_LATERLOAD:
- m_docStatus = PDF_DATAAVAIL_PAGE;
- default:
- m_bDocAvail = TRUE;
- return TRUE;
- }
-}
-
-FX_BOOL CPDF_DataAvail::CheckPageStatus(DownloadHints* pHints) {
- switch (m_docStatus) {
- case PDF_DATAAVAIL_PAGETREE:
- return CheckPages(pHints);
- case PDF_DATAAVAIL_PAGE:
- return CheckPage(pHints);
- case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
- default:
- m_bPagesTreeLoad = TRUE;
- m_bPagesLoad = TRUE;
- return TRUE;
- }
-}
-
-FX_BOOL CPDF_DataAvail::LoadAllFile(DownloadHints* pHints) {
- if (m_pFileAvail->IsDataAvail(0, (uint32_t)m_dwFileLen)) {
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
- }
-
- pHints->AddSegment(0, (uint32_t)m_dwFileLen);
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::LoadAllXref(DownloadHints* pHints) {
- m_parser.m_pSyntax->InitParser(m_pFileRead, (uint32_t)m_dwHeaderOffset);
- m_parser.m_bOwnFileRead = false;
- if (!m_parser.LoadAllCrossRefV4(m_dwLastXRefOffset) &&
- !m_parser.LoadAllCrossRefV5(m_dwLastXRefOffset)) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return FALSE;
- }
-
- m_dwRootObjNum = m_parser.GetRootObjNum();
- m_dwInfoObjNum = m_parser.GetInfoObjNum();
- m_pCurrentParser = &m_parser;
- m_docStatus = PDF_DATAAVAIL_ROOT;
- return TRUE;
-}
-
-CPDF_Object* CPDF_DataAvail::GetObject(uint32_t objnum,
- DownloadHints* pHints,
- FX_BOOL* pExistInFile) {
- CPDF_Object* pRet = nullptr;
- uint32_t size = 0;
- FX_FILESIZE offset = 0;
- CPDF_Parser* pParser = nullptr;
-
- if (pExistInFile)
- *pExistInFile = TRUE;
-
- if (m_pDocument) {
- size = GetObjectSize(objnum, offset);
- pParser = m_pDocument->GetParser();
- } else {
- size = (uint32_t)m_parser.GetObjectSize(objnum);
- offset = m_parser.GetObjectOffset(objnum);
- pParser = &m_parser;
- }
-
- if (!IsDataAvail(offset, size, pHints))
- return nullptr;
-
- if (pParser)
- pRet = pParser->ParseIndirectObject(nullptr, objnum);
-
- if (!pRet && pExistInFile)
- *pExistInFile = FALSE;
-
- return pRet;
-}
-
-FX_BOOL CPDF_DataAvail::CheckInfo(DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- CPDF_Object* pInfo = GetObject(m_dwInfoObjNum, pHints, &bExist);
- if (!bExist) {
- m_docStatus =
- (m_bHaveAcroForm ? PDF_DATAAVAIL_ACROFORM : PDF_DATAAVAIL_PAGETREE);
- return TRUE;
- }
-
- if (!pInfo) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- if (m_Pos == m_dwFileLen)
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (pInfo)
- pInfo->Release();
-
- m_docStatus =
- (m_bHaveAcroForm ? PDF_DATAAVAIL_ACROFORM : PDF_DATAAVAIL_PAGETREE);
-
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckRoot(DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- m_pRoot = GetObject(m_dwRootObjNum, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- if (!m_pRoot) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
- return FALSE;
- }
-
- CPDF_Dictionary* pDict = m_pRoot->GetDict();
- if (!pDict) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- CPDF_Reference* pRef = ToReference(pDict->GetObjectFor("Pages"));
- if (!pRef) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- m_PagesObjNum = pRef->GetRefObjNum();
- CPDF_Reference* pAcroFormRef =
- ToReference(m_pRoot->GetDict()->GetObjectFor("AcroForm"));
- if (pAcroFormRef) {
- m_bHaveAcroForm = TRUE;
- m_dwAcroFormObjNum = pAcroFormRef->GetRefObjNum();
- }
-
- if (m_dwInfoObjNum) {
- m_docStatus = PDF_DATAAVAIL_INFO;
- } else {
- m_docStatus =
- m_bHaveAcroForm ? PDF_DATAAVAIL_ACROFORM : PDF_DATAAVAIL_PAGETREE;
- }
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::PreparePageItem() {
- CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
- CPDF_Reference* pRef =
- ToReference(pRoot ? pRoot->GetObjectFor("Pages") : nullptr);
- if (!pRef) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- m_PagesObjNum = pRef->GetRefObjNum();
- m_pCurrentParser = m_pDocument->GetParser();
- m_docStatus = PDF_DATAAVAIL_PAGETREE;
- return TRUE;
-}
-
-bool CPDF_DataAvail::IsFirstCheck(uint32_t dwPage) {
- return m_pageMapCheckState.insert(dwPage).second;
-}
-
-void CPDF_DataAvail::ResetFirstCheck(uint32_t dwPage) {
- m_pageMapCheckState.erase(dwPage);
-}
-
-FX_BOOL CPDF_DataAvail::CheckPage(DownloadHints* pHints) {
- uint32_t iPageObjs = m_PageObjList.GetSize();
- CFX_ArrayTemplate<uint32_t> UnavailObjList;
- for (uint32_t i = 0; i < iPageObjs; ++i) {
- uint32_t dwPageObjNum = m_PageObjList.GetAt(i);
- FX_BOOL bExist = FALSE;
- CPDF_Object* pObj = GetObject(dwPageObjNum, pHints, &bExist);
- if (!pObj) {
- if (bExist)
- UnavailObjList.Add(dwPageObjNum);
- continue;
- }
-
- CPDF_Array* pArray = ToArray(pObj);
- if (pArray) {
- for (CPDF_Object* pArrayObj : *pArray) {
- if (CPDF_Reference* pRef = ToReference(pArrayObj))
- UnavailObjList.Add(pRef->GetRefObjNum());
- }
- }
-
- if (!pObj->IsDictionary()) {
- pObj->Release();
- continue;
- }
-
- CFX_ByteString type = pObj->GetDict()->GetStringFor("Type");
- if (type == "Pages") {
- m_PagesArray.Add(pObj);
- continue;
- }
- pObj->Release();
- }
-
- m_PageObjList.RemoveAll();
- if (UnavailObjList.GetSize()) {
- m_PageObjList.Append(UnavailObjList);
- return FALSE;
- }
-
- uint32_t iPages = m_PagesArray.GetSize();
- for (uint32_t i = 0; i < iPages; i++) {
- CPDF_Object* pPages = m_PagesArray.GetAt(i);
- if (!pPages)
- continue;
-
- if (!GetPageKids(m_pCurrentParser, pPages)) {
- pPages->Release();
- while (++i < iPages) {
- pPages = m_PagesArray.GetAt(i);
- pPages->Release();
- }
- m_PagesArray.RemoveAll();
-
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
- pPages->Release();
- }
-
- m_PagesArray.RemoveAll();
- if (!m_PageObjList.GetSize())
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages) {
- if (!pParser) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- CPDF_Dictionary* pDict = pPages->GetDict();
- CPDF_Object* pKids = pDict ? pDict->GetObjectFor("Kids") : nullptr;
- if (!pKids)
- return TRUE;
-
- switch (pKids->GetType()) {
- case CPDF_Object::REFERENCE:
- m_PageObjList.Add(pKids->AsReference()->GetRefObjNum());
- break;
- case CPDF_Object::ARRAY: {
- CPDF_Array* pKidsArray = pKids->AsArray();
- for (size_t i = 0; i < pKidsArray->GetCount(); ++i) {
- if (CPDF_Reference* pRef = ToReference(pKidsArray->GetObjectAt(i)))
- m_PageObjList.Add(pRef->GetRefObjNum());
- }
- } break;
- default:
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckPages(DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- CPDF_Object* pPages = GetObject(m_PagesObjNum, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- if (!pPages) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
- return FALSE;
- }
-
- if (!GetPageKids(m_pCurrentParser, pPages)) {
- pPages->Release();
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- pPages->Release();
- m_docStatus = PDF_DATAAVAIL_PAGE;
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckHeader(DownloadHints* pHints) {
- ASSERT(m_dwFileLen >= 0);
- const uint32_t kReqSize = std::min(static_cast<uint32_t>(m_dwFileLen), 1024U);
-
- if (m_pFileAvail->IsDataAvail(0, kReqSize)) {
- uint8_t buffer[1024];
- m_pFileRead->ReadBlock(buffer, 0, kReqSize);
-
- if (IsLinearizedFile(buffer, kReqSize)) {
- m_docStatus = PDF_DATAAVAIL_FIRSTPAGE;
- } else {
- if (m_docStatus == PDF_DATAAVAIL_ERROR)
- return FALSE;
- m_docStatus = PDF_DATAAVAIL_END;
- }
- return TRUE;
- }
-
- pHints->AddSegment(0, kReqSize);
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckFirstPage(DownloadHints* pHints) {
- CPDF_Dictionary* pDict = m_pLinearized->GetDict();
- CPDF_Object* pEndOffSet = pDict ? pDict->GetObjectFor("E") : nullptr;
- if (!pEndOffSet) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- CPDF_Object* pXRefOffset = pDict ? pDict->GetObjectFor("T") : nullptr;
- if (!pXRefOffset) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- CPDF_Object* pFileLen = pDict ? pDict->GetObjectFor("L") : nullptr;
- if (!pFileLen) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- FX_BOOL bNeedDownLoad = FALSE;
- if (pEndOffSet->IsNumber()) {
- uint32_t dwEnd = pEndOffSet->GetInteger();
- dwEnd += 512;
- if ((FX_FILESIZE)dwEnd > m_dwFileLen)
- dwEnd = (uint32_t)m_dwFileLen;
-
- int32_t iStartPos = (int32_t)(m_dwFileLen > 1024 ? 1024 : m_dwFileLen);
- int32_t iSize = dwEnd > 1024 ? dwEnd - 1024 : 0;
- if (!m_pFileAvail->IsDataAvail(iStartPos, iSize)) {
- pHints->AddSegment(iStartPos, iSize);
- bNeedDownLoad = TRUE;
- }
- }
-
- m_dwLastXRefOffset = 0;
- FX_FILESIZE dwFileLen = 0;
- if (pXRefOffset->IsNumber())
- m_dwLastXRefOffset = pXRefOffset->GetInteger();
-
- if (pFileLen->IsNumber())
- dwFileLen = pFileLen->GetInteger();
-
- if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset,
- (uint32_t)(dwFileLen - m_dwLastXRefOffset))) {
- if (m_docStatus == PDF_DATAAVAIL_FIRSTPAGE) {
- uint32_t dwSize = (uint32_t)(dwFileLen - m_dwLastXRefOffset);
- FX_FILESIZE offset = m_dwLastXRefOffset;
- if (dwSize < 512 && dwFileLen > 512) {
- dwSize = 512;
- offset = dwFileLen - 512;
- }
- pHints->AddSegment(offset, dwSize);
- }
- } else {
- m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
- }
-
- if (bNeedDownLoad || m_docStatus != PDF_DATAAVAIL_FIRSTPAGE_PREPARE) {
- m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
- return FALSE;
- }
-
- m_docStatus =
- m_bSupportHintTable ? PDF_DATAAVAIL_HINTTABLE : PDF_DATAAVAIL_DONE;
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::IsDataAvail(FX_FILESIZE offset,
- uint32_t size,
- DownloadHints* pHints) {
- if (offset < 0 || offset > m_dwFileLen)
- return TRUE;
-
- FX_SAFE_FILESIZE safeSize = offset;
- safeSize += size;
- safeSize += 512;
- if (!safeSize.IsValid() || safeSize.ValueOrDie() > m_dwFileLen)
- size = m_dwFileLen - offset;
- else
- size += 512;
-
- if (!m_pFileAvail->IsDataAvail(offset, size)) {
- pHints->AddSegment(offset, size);
- return FALSE;
- }
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckHintTables(DownloadHints* pHints) {
- CPDF_Dictionary* pDict = m_pLinearized->GetDict();
- if (!pDict) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- // The actual value is not required here, but validate its existence and type.
- CPDF_Number* pFirstPage = ToNumber(pDict->GetDirectObjectFor("O"));
- if (!pFirstPage || !pFirstPage->IsInteger()) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- CPDF_Number* pPageCount = ToNumber(pDict->GetDirectObjectFor("N"));
- if (!pPageCount || !pPageCount->IsInteger()) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- int nPageCount = pPageCount->GetInteger();
- if (nPageCount <= 1) {
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
- }
-
- CPDF_Array* pHintStreamRange = pDict->GetArrayFor("H");
- size_t nHintStreamSize = pHintStreamRange ? pHintStreamRange->GetCount() : 0;
- if (nHintStreamSize != 2 && nHintStreamSize != 4) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- for (const CPDF_Object* pArrayObject : *pHintStreamRange) {
- const CPDF_Number* pNumber = ToNumber(pArrayObject->GetDirect());
- if (!pNumber || !pNumber->IsInteger()) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
- }
-
- FX_FILESIZE szHintStart = pHintStreamRange->GetIntegerAt(0);
- FX_FILESIZE szHintLength = pHintStreamRange->GetIntegerAt(1);
- if (szHintStart < 0 || szHintLength <= 0) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!IsDataAvail(szHintStart, szHintLength, pHints))
- return FALSE;
-
- m_syntaxParser.InitParser(m_pFileRead, m_dwHeaderOffset);
-
- std::unique_ptr<CPDF_HintTables> pHintTables(
- new CPDF_HintTables(this, pDict));
- std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pHintStream(
- ParseIndirectObjectAt(szHintStart, 0));
- CPDF_Stream* pStream = ToStream(pHintStream.get());
- if (pStream && pHintTables->LoadHintStream(pStream))
- m_pHintTables = std::move(pHintTables);
-
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
-}
-
-CPDF_Object* CPDF_DataAvail::ParseIndirectObjectAt(
- FX_FILESIZE pos,
- uint32_t objnum,
- CPDF_IndirectObjectHolder* pObjList) {
- FX_FILESIZE SavedPos = m_syntaxParser.SavePos();
- m_syntaxParser.RestorePos(pos);
-
- bool bIsNumber;
- CFX_ByteString word = m_syntaxParser.GetNextWord(&bIsNumber);
- if (!bIsNumber)
- return nullptr;
-
- uint32_t parser_objnum = FXSYS_atoui(word.c_str());
- if (objnum && parser_objnum != objnum)
- return nullptr;
-
- word = m_syntaxParser.GetNextWord(&bIsNumber);
- if (!bIsNumber)
- return nullptr;
-
- uint32_t gennum = FXSYS_atoui(word.c_str());
- if (m_syntaxParser.GetKeyword() != "obj") {
- m_syntaxParser.RestorePos(SavedPos);
- return nullptr;
- }
-
- CPDF_Object* pObj =
- m_syntaxParser.GetObject(pObjList, parser_objnum, gennum, true);
- m_syntaxParser.RestorePos(SavedPos);
- return pObj;
-}
-
-CPDF_DataAvail::DocLinearizationStatus CPDF_DataAvail::IsLinearizedPDF() {
- const uint32_t kReqSize = 1024;
- if (!m_pFileAvail->IsDataAvail(0, kReqSize))
- return LinearizationUnknown;
-
- if (!m_pFileRead)
- return NotLinearized;
-
- FX_FILESIZE dwSize = m_pFileRead->GetSize();
- if (dwSize < (FX_FILESIZE)kReqSize)
- return LinearizationUnknown;
-
- uint8_t buffer[1024];
- m_pFileRead->ReadBlock(buffer, 0, kReqSize);
- if (IsLinearizedFile(buffer, kReqSize))
- return Linearized;
-
- return NotLinearized;
-}
-
-FX_BOOL CPDF_DataAvail::IsLinearized() {
- return m_bLinearized;
-}
-
-FX_BOOL CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, uint32_t dwLen) {
- if (m_pLinearized)
- return m_bLinearized;
-
- ScopedFileStream file(FX_CreateMemoryStream(pData, (size_t)dwLen, FALSE));
-
- int32_t offset = GetHeaderOffset(file.get());
- if (offset == -1) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- m_dwHeaderOffset = offset;
- m_syntaxParser.InitParser(file.get(), offset);
- m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9);
-
- bool bNumber;
- CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(&bNumber);
- if (!bNumber)
- return FALSE;
-
- uint32_t objnum = FXSYS_atoui(wordObjNum.c_str());
- m_pLinearized =
- ParseIndirectObjectAt(m_syntaxParser.m_HeaderOffset + 9, objnum);
- if (!m_pLinearized)
- return FALSE;
-
- CPDF_Dictionary* pDict = m_pLinearized->GetDict();
- if (!pDict || !pDict->GetObjectFor("Linearized"))
- return FALSE;
-
- CPDF_Object* pLen = pDict->GetObjectFor("L");
- if (!pLen)
- return FALSE;
-
- if ((FX_FILESIZE)pLen->GetInteger() != m_pFileRead->GetSize())
- return FALSE;
-
- m_bLinearized = TRUE;
-
- if (CPDF_Number* pNo = ToNumber(pDict->GetObjectFor("P")))
- m_dwFirstPageNo = pNo->GetInteger();
-
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckEnd(DownloadHints* pHints) {
- uint32_t req_pos = (uint32_t)(m_dwFileLen > 1024 ? m_dwFileLen - 1024 : 0);
- uint32_t dwSize = (uint32_t)(m_dwFileLen - req_pos);
-
- if (m_pFileAvail->IsDataAvail(req_pos, dwSize)) {
- uint8_t buffer[1024];
- m_pFileRead->ReadBlock(buffer, req_pos, dwSize);
-
- ScopedFileStream file(FX_CreateMemoryStream(buffer, (size_t)dwSize, FALSE));
- m_syntaxParser.InitParser(file.get(), 0);
- m_syntaxParser.RestorePos(dwSize - 1);
-
- if (m_syntaxParser.SearchWord("startxref", TRUE, FALSE, dwSize)) {
- m_syntaxParser.GetNextWord(nullptr);
-
- bool bNumber;
- CFX_ByteString xrefpos_str = m_syntaxParser.GetNextWord(&bNumber);
- if (!bNumber) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- m_dwXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str.c_str());
- if (!m_dwXRefOffset || m_dwXRefOffset > m_dwFileLen) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- m_dwLastXRefOffset = m_dwXRefOffset;
- SetStartOffset(m_dwXRefOffset);
- m_docStatus = PDF_DATAAVAIL_CROSSREF;
- return TRUE;
- }
-
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- pHints->AddSegment(req_pos, dwSize);
- return FALSE;
-}
-
-int32_t CPDF_DataAvail::CheckCrossRefStream(DownloadHints* pHints,
- FX_FILESIZE& xref_offset) {
- xref_offset = 0;
- uint32_t req_size =
- (uint32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
-
- if (m_pFileAvail->IsDataAvail(m_Pos, req_size)) {
- int32_t iSize = (int32_t)(m_Pos + req_size - m_dwCurrentXRefSteam);
- CFX_BinaryBuf buf(iSize);
- uint8_t* pBuf = buf.GetBuffer();
-
- m_pFileRead->ReadBlock(pBuf, m_dwCurrentXRefSteam, iSize);
-
- ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
- m_parser.m_pSyntax->InitParser(file.get(), 0);
-
- bool bNumber;
- CFX_ByteString objnum = m_parser.m_pSyntax->GetNextWord(&bNumber);
- if (!bNumber)
- return -1;
-
- uint32_t objNum = FXSYS_atoui(objnum.c_str());
- CPDF_Object* pObj = m_parser.ParseIndirectObjectAt(nullptr, 0, objNum);
- if (!pObj) {
- m_Pos += m_parser.m_pSyntax->SavePos();
- return 0;
- }
-
- CPDF_Dictionary* pDict = pObj->GetDict();
- CPDF_Name* pName = ToName(pDict ? pDict->GetObjectFor("Type") : nullptr);
- if (pName) {
- if (pName->GetString() == "XRef") {
- m_Pos += m_parser.m_pSyntax->SavePos();
- xref_offset = pObj->GetDict()->GetIntegerFor("Prev");
- pObj->Release();
- return 1;
- }
- }
- pObj->Release();
- return -1;
- }
- pHints->AddSegment(m_Pos, req_size);
- return 0;
-}
-
-void CPDF_DataAvail::SetStartOffset(FX_FILESIZE dwOffset) {
- m_Pos = dwOffset;
-}
-
-FX_BOOL CPDF_DataAvail::GetNextToken(CFX_ByteString& token) {
- uint8_t ch;
- if (!GetNextChar(ch))
- return FALSE;
-
- while (1) {
- while (PDFCharIsWhitespace(ch)) {
- if (!GetNextChar(ch))
- return FALSE;
- }
-
- if (ch != '%')
- break;
-
- while (1) {
- if (!GetNextChar(ch))
- return FALSE;
- if (PDFCharIsLineEnding(ch))
- break;
- }
- }
-
- uint8_t buffer[256];
- uint32_t index = 0;
- if (PDFCharIsDelimiter(ch)) {
- buffer[index++] = ch;
- if (ch == '/') {
- while (1) {
- if (!GetNextChar(ch))
- return FALSE;
-
- if (!PDFCharIsOther(ch) && !PDFCharIsNumeric(ch)) {
- m_Pos--;
- CFX_ByteString ret(buffer, index);
- token = ret;
- return TRUE;
- }
-
- if (index < sizeof(buffer))
- buffer[index++] = ch;
- }
- } else if (ch == '<') {
- if (!GetNextChar(ch))
- return FALSE;
-
- if (ch == '<')
- buffer[index++] = ch;
- else
- m_Pos--;
- } else if (ch == '>') {
- if (!GetNextChar(ch))
- return FALSE;
-
- if (ch == '>')
- buffer[index++] = ch;
- else
- m_Pos--;
- }
-
- CFX_ByteString ret(buffer, index);
- token = ret;
- return TRUE;
- }
-
- while (1) {
- if (index < sizeof(buffer))
- buffer[index++] = ch;
-
- if (!GetNextChar(ch))
- return FALSE;
-
- if (PDFCharIsDelimiter(ch) || PDFCharIsWhitespace(ch)) {
- m_Pos--;
- break;
- }
- }
-
- token = CFX_ByteString(buffer, index);
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::GetNextChar(uint8_t& ch) {
- FX_FILESIZE pos = m_Pos;
- if (pos >= m_dwFileLen)
- return FALSE;
-
- if (m_bufferOffset >= pos ||
- (FX_FILESIZE)(m_bufferOffset + m_bufferSize) <= pos) {
- FX_FILESIZE read_pos = pos;
- uint32_t read_size = 512;
- if ((FX_FILESIZE)read_size > m_dwFileLen)
- read_size = (uint32_t)m_dwFileLen;
-
- if ((FX_FILESIZE)(read_pos + read_size) > m_dwFileLen)
- read_pos = m_dwFileLen - read_size;
-
- if (!m_pFileRead->ReadBlock(m_bufferData, read_pos, read_size))
- return FALSE;
-
- m_bufferOffset = read_pos;
- m_bufferSize = read_size;
- }
- ch = m_bufferData[pos - m_bufferOffset];
- m_Pos++;
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckCrossRefItem(DownloadHints* pHints) {
- int32_t iSize = 0;
- CFX_ByteString token;
- while (1) {
- if (!GetNextToken(token)) {
- iSize = (int32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
- pHints->AddSegment(m_Pos, iSize);
- return FALSE;
- }
-
- if (token == "trailer") {
- m_dwTrailerOffset = m_Pos;
- m_docStatus = PDF_DATAAVAIL_TRAILER;
- return TRUE;
- }
- }
-}
-
-FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(DownloadHints* pHints) {
- FX_FILESIZE xref_offset = 0;
-
- int32_t nRet = CheckCrossRefStream(pHints, xref_offset);
- if (nRet == 1) {
- if (!xref_offset) {
- m_docStatus = PDF_DATAAVAIL_LOADALLCROSSREF;
- } else {
- m_dwCurrentXRefSteam = xref_offset;
- m_Pos = xref_offset;
- }
- return TRUE;
- }
-
- if (nRet == -1)
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckCrossRef(DownloadHints* pHints) {
- int32_t iSize = 0;
- CFX_ByteString token;
- if (!GetNextToken(token)) {
- iSize = (int32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
- pHints->AddSegment(m_Pos, iSize);
- return FALSE;
- }
-
- if (token == "xref") {
- while (1) {
- if (!GetNextToken(token)) {
- iSize =
- (int32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
- pHints->AddSegment(m_Pos, iSize);
- m_docStatus = PDF_DATAAVAIL_CROSSREF_ITEM;
- return FALSE;
- }
-
- if (token == "trailer") {
- m_dwTrailerOffset = m_Pos;
- m_docStatus = PDF_DATAAVAIL_TRAILER;
- return TRUE;
- }
- }
- } else {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckTrailerAppend(DownloadHints* pHints) {
- if (m_Pos < m_dwFileLen) {
- FX_FILESIZE dwAppendPos = m_Pos + m_syntaxParser.SavePos();
- int32_t iSize = (int32_t)(
- dwAppendPos + 512 > m_dwFileLen ? m_dwFileLen - dwAppendPos : 512);
-
- if (!m_pFileAvail->IsDataAvail(dwAppendPos, iSize)) {
- pHints->AddSegment(dwAppendPos, iSize);
- return FALSE;
- }
- }
-
- if (m_dwPrevXRefOffset) {
- SetStartOffset(m_dwPrevXRefOffset);
- m_docStatus = PDF_DATAAVAIL_CROSSREF;
- } else {
- m_docStatus = PDF_DATAAVAIL_LOADALLCROSSREF;
- }
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckTrailer(DownloadHints* pHints) {
- int32_t iTrailerSize =
- (int32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
- if (m_pFileAvail->IsDataAvail(m_Pos, iTrailerSize)) {
- int32_t iSize = (int32_t)(m_Pos + iTrailerSize - m_dwTrailerOffset);
- CFX_BinaryBuf buf(iSize);
- uint8_t* pBuf = buf.GetBuffer();
- if (!pBuf) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!m_pFileRead->ReadBlock(pBuf, m_dwTrailerOffset, iSize))
- return FALSE;
-
- ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
- m_syntaxParser.InitParser(file.get(), 0);
-
- std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pTrailer(
- m_syntaxParser.GetObject(nullptr, 0, 0, true));
- if (!pTrailer) {
- m_Pos += m_syntaxParser.SavePos();
- pHints->AddSegment(m_Pos, iTrailerSize);
- return FALSE;
- }
-
- if (!pTrailer->IsDictionary())
- return FALSE;
-
- CPDF_Dictionary* pTrailerDict = pTrailer->GetDict();
- CPDF_Object* pEncrypt = pTrailerDict->GetObjectFor("Encrypt");
- if (ToReference(pEncrypt)) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- return TRUE;
- }
-
- uint32_t xrefpos = GetDirectInteger(pTrailerDict, "Prev");
- if (xrefpos) {
- m_dwPrevXRefOffset = GetDirectInteger(pTrailerDict, "XRefStm");
- if (m_dwPrevXRefOffset) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- } else {
- m_dwPrevXRefOffset = xrefpos;
- if (m_dwPrevXRefOffset >= m_dwFileLen) {
- m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
- } else {
- SetStartOffset(m_dwPrevXRefOffset);
- m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
- }
- }
- return TRUE;
- }
- m_dwPrevXRefOffset = 0;
- m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
- return TRUE;
- }
- pHints->AddSegment(m_Pos, iTrailerSize);
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckPage(uint32_t dwPage, DownloadHints* pHints) {
- while (TRUE) {
- switch (m_docStatus) {
- case PDF_DATAAVAIL_PAGETREE:
- if (!LoadDocPages(pHints))
- return FALSE;
- break;
- case PDF_DATAAVAIL_PAGE:
- if (!LoadDocPage(dwPage, pHints))
- return FALSE;
- break;
- case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
- default:
- m_bPagesTreeLoad = TRUE;
- m_bPagesLoad = TRUE;
- m_bCurPageDictLoadOK = TRUE;
- m_docStatus = PDF_DATAAVAIL_PAGE;
- return TRUE;
- }
- }
-}
-
-FX_BOOL CPDF_DataAvail::CheckArrayPageNode(uint32_t dwPageNo,
- PageNode* pPageNode,
- DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- CPDF_Object* pPages = GetObject(dwPageNo, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!pPages) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
- return FALSE;
- }
-
- CPDF_Array* pArray = pPages->AsArray();
- if (!pArray) {
- pPages->Release();
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- pPageNode->m_type = PDF_PAGENODE_PAGES;
- for (size_t i = 0; i < pArray->GetCount(); ++i) {
- CPDF_Reference* pKid = ToReference(pArray->GetObjectAt(i));
- if (!pKid)
- continue;
-
- PageNode* pNode = new PageNode();
- pPageNode->m_childNode.Add(pNode);
- pNode->m_dwPageNo = pKid->GetRefObjNum();
- }
- pPages->Release();
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(uint32_t dwPageNo,
- PageNode* pPageNode,
- DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- CPDF_Object* pPage = GetObject(dwPageNo, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!pPage) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR)
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (pPage->IsArray()) {
- pPageNode->m_dwPageNo = dwPageNo;
- pPageNode->m_type = PDF_PAGENODE_ARRAY;
- pPage->Release();
- return TRUE;
- }
-
- if (!pPage->IsDictionary()) {
- pPage->Release();
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- pPageNode->m_dwPageNo = dwPageNo;
- CPDF_Dictionary* pDict = pPage->GetDict();
- CFX_ByteString type = pDict->GetStringFor("Type");
- if (type == "Pages") {
- pPageNode->m_type = PDF_PAGENODE_PAGES;
- CPDF_Object* pKids = pDict->GetObjectFor("Kids");
- if (!pKids) {
- m_docStatus = PDF_DATAAVAIL_PAGE;
- return TRUE;
- }
-
- switch (pKids->GetType()) {
- case CPDF_Object::REFERENCE: {
- CPDF_Reference* pKid = pKids->AsReference();
- PageNode* pNode = new PageNode();
- pPageNode->m_childNode.Add(pNode);
- pNode->m_dwPageNo = pKid->GetRefObjNum();
- } break;
- case CPDF_Object::ARRAY: {
- CPDF_Array* pKidsArray = pKids->AsArray();
- for (size_t i = 0; i < pKidsArray->GetCount(); ++i) {
- CPDF_Reference* pKid = ToReference(pKidsArray->GetObjectAt(i));
- if (!pKid)
- continue;
-
- PageNode* pNode = new PageNode();
- pPageNode->m_childNode.Add(pNode);
- pNode->m_dwPageNo = pKid->GetRefObjNum();
- }
- } break;
- default:
- break;
- }
- } else if (type == "Page") {
- pPageNode->m_type = PDF_PAGENODE_PAGE;
- } else {
- pPage->Release();
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
- pPage->Release();
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_DataAvail::PageNode& pageNodes,
- int32_t iPage,
- int32_t& iCount,
- DownloadHints* pHints,
- int level) {
- if (level >= kMaxPageRecursionDepth)
- return FALSE;
-
- int32_t iSize = pageNodes.m_childNode.GetSize();
- if (iSize <= 0 || iPage >= iSize) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- for (int32_t i = 0; i < iSize; ++i) {
- PageNode* pNode = pageNodes.m_childNode.GetAt(i);
- if (!pNode)
- continue;
-
- switch (pNode->m_type) {
- case PDF_PAGENODE_UNKNOWN:
- if (!CheckUnkownPageNode(pNode->m_dwPageNo, pNode, pHints)) {
- return FALSE;
- }
- --i;
- break;
- case PDF_PAGENODE_PAGE:
- iCount++;
- if (iPage == iCount && m_pDocument)
- m_pDocument->SetPageObjNum(iPage, pNode->m_dwPageNo);
- break;
- case PDF_PAGENODE_PAGES:
- if (!CheckPageNode(*pNode, iPage, iCount, pHints, level + 1))
- return FALSE;
- break;
- case PDF_PAGENODE_ARRAY:
- if (!CheckArrayPageNode(pNode->m_dwPageNo, pNode, pHints))
- return FALSE;
- --i;
- break;
- }
-
- if (iPage == iCount) {
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
- }
- }
- return TRUE;
-}
-
-FX_BOOL CPDF_DataAvail::LoadDocPage(uint32_t dwPage, DownloadHints* pHints) {
- FX_SAFE_INT32 safePage = pdfium::base::checked_cast<int32_t>(dwPage);
- int32_t iPage = safePage.ValueOrDie();
- if (m_pDocument->GetPageCount() <= iPage ||
- m_pDocument->IsPageLoaded(iPage)) {
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
- }
-
- if (m_pageNodes.m_type == PDF_PAGENODE_PAGE) {
- if (iPage == 0) {
- m_docStatus = PDF_DATAAVAIL_DONE;
- return TRUE;
- }
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return TRUE;
- }
- int32_t iCount = -1;
- return CheckPageNode(m_pageNodes, iPage, iCount, pHints, 0);
-}
-
-FX_BOOL CPDF_DataAvail::CheckPageCount(DownloadHints* pHints) {
- FX_BOOL bExist = FALSE;
- CPDF_Object* pPages = GetObject(m_PagesObjNum, pHints, &bExist);
- if (!bExist) {
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!pPages)
- return FALSE;
-
- CPDF_Dictionary* pPagesDict = pPages->GetDict();
- if (!pPagesDict) {
- pPages->Release();
- m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
-
- if (!pPagesDict->KeyExist("Kids")) {
- pPages->Release();
- return TRUE;
- }
-
- int count = pPagesDict->GetIntegerFor("Count");
- if (count > 0) {
- pPages->Release();
- return TRUE;
- }
-
- pPages->Release();
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::LoadDocPages(DownloadHints* pHints) {
- if (!CheckUnkownPageNode(m_PagesObjNum, &m_pageNodes, pHints))
- return FALSE;
-
- if (CheckPageCount(pHints)) {
- m_docStatus = PDF_DATAAVAIL_PAGE;
- return TRUE;
- }
-
- m_bTotalLoadPageTree = TRUE;
- return FALSE;
-}
-
-FX_BOOL CPDF_DataAvail::LoadPages(DownloadHints* pHints) {
- while (!m_bPagesTreeLoad) {
- if (!CheckPageStatus(pHints))
- return FALSE;
- }
-
- if (m_bPagesLoad)
- return TRUE;
-
- m_pDocument->LoadPages();
- return FALSE;
-}
-
-CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedData(
- DownloadHints* pHints) {
- if (m_bLinearedDataOK)
- return DataAvailable;
-
- if (!m_bMainXRefLoadTried) {
- FX_SAFE_UINT32 data_size = m_dwFileLen;
- data_size -= m_dwLastXRefOffset;
- if (!data_size.IsValid())
- return DataError;
-
- if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset,
- data_size.ValueOrDie())) {
- pHints->AddSegment(m_dwLastXRefOffset, data_size.ValueOrDie());
- return DataNotAvailable;
- }
-
- CPDF_Parser::Error eRet =
- m_pDocument->GetParser()->LoadLinearizedMainXRefTable();
- m_bMainXRefLoadTried = TRUE;
- if (eRet != CPDF_Parser::SUCCESS)
- return DataError;
-
- if (!PreparePageItem())
- return DataNotAvailable;
-
- m_bMainXRefLoadedOK = TRUE;
- m_bLinearedDataOK = TRUE;
- }
-
- return m_bLinearedDataOK ? DataAvailable : DataNotAvailable;
-}
-
-FX_BOOL CPDF_DataAvail::CheckPageAnnots(uint32_t dwPage,
- DownloadHints* pHints) {
- if (!m_objs_array.GetSize()) {
- m_objs_array.RemoveAll();
- m_ObjectSet.clear();
-
- FX_SAFE_INT32 safePage = pdfium::base::checked_cast<int32_t>(dwPage);
- CPDF_Dictionary* pPageDict = m_pDocument->GetPage(safePage.ValueOrDie());
- if (!pPageDict)
- return TRUE;
-
- CPDF_Object* pAnnots = pPageDict->GetObjectFor("Annots");
- if (!pAnnots)
- return TRUE;
-
- CFX_ArrayTemplate<CPDF_Object*> obj_array;
- obj_array.Add(pAnnots);
-
- FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
- if (bRet)
- m_objs_array.RemoveAll();
-
- return bRet;
- }
-
- CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
- FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
- m_objs_array.RemoveAll();
- if (!bRet)
- m_objs_array.Append(new_objs_array);
-
- return bRet;
-}
-
-CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedFirstPage(
- uint32_t dwPage,
- DownloadHints* pHints) {
- if (!m_bAnnotsLoad) {
- if (!CheckPageAnnots(dwPage, pHints))
- return DataNotAvailable;
- m_bAnnotsLoad = TRUE;
- }
-
- DocAvailStatus nRet = CheckLinearizedData(pHints);
- if (nRet == DataAvailable)
- m_bPageLoadedOK = FALSE;
- return nRet;
-}
-
-FX_BOOL CPDF_DataAvail::HaveResourceAncestor(CPDF_Dictionary* pDict) {
- CFX_AutoRestorer<int> restorer(&s_CurrentDataAvailRecursionDepth);
- if (++s_CurrentDataAvailRecursionDepth > kMaxDataAvailRecursionDepth)
- return FALSE;
-
- CPDF_Object* pParent = pDict->GetObjectFor("Parent");
- if (!pParent)
- return FALSE;
-
- CPDF_Dictionary* pParentDict = pParent->GetDict();
- if (!pParentDict)
- return FALSE;
-
- CPDF_Object* pRet = pParentDict->GetObjectFor("Resources");
- if (pRet) {
- m_pPageResource = pRet;
- return TRUE;
- }
-
- return HaveResourceAncestor(pParentDict);
-}
-
-CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
- uint32_t dwPage,
- DownloadHints* pHints) {
- if (!m_pDocument)
- return DataError;
-
- if (IsFirstCheck(dwPage)) {
- m_bCurPageDictLoadOK = FALSE;
- m_bPageLoadedOK = FALSE;
- m_bAnnotsLoad = FALSE;
- m_bNeedDownLoadResource = FALSE;
- m_objs_array.RemoveAll();
- m_ObjectSet.clear();
- }
-
- if (pdfium::ContainsKey(m_pagesLoadState, dwPage))
- return DataAvailable;
-
- if (m_bLinearized) {
- if (dwPage == m_dwFirstPageNo) {
- DocAvailStatus nRet = CheckLinearizedFirstPage(dwPage, pHints);
- if (nRet == DataAvailable)
- m_pagesLoadState.insert(dwPage);
- return nRet;
- }
-
- DocAvailStatus nResult = CheckLinearizedData(pHints);
- if (nResult != DataAvailable)
- return nResult;
-
- if (m_pHintTables) {
- nResult = m_pHintTables->CheckPage(dwPage, pHints);
- if (nResult != DataAvailable)
- return nResult;
- m_pagesLoadState.insert(dwPage);
- return DataAvailable;
- }
-
- if (m_bMainXRefLoadedOK) {
- if (m_bTotalLoadPageTree) {
- if (!LoadPages(pHints))
- return DataNotAvailable;
- } else {
- if (!m_bCurPageDictLoadOK && !CheckPage(dwPage, pHints))
- return DataNotAvailable;
- }
- } else {
- if (!LoadAllFile(pHints))
- return DataNotAvailable;
- m_pDocument->GetParser()->RebuildCrossRef();
- ResetFirstCheck(dwPage);
- return DataAvailable;
- }
- } else {
- if (!m_bTotalLoadPageTree && !m_bCurPageDictLoadOK &&
- !CheckPage(dwPage, pHints)) {
- return DataNotAvailable;
- }
- }
-
- if (m_bHaveAcroForm && !m_bAcroFormLoad) {
- if (!CheckAcroFormSubObject(pHints))
- return DataNotAvailable;
- m_bAcroFormLoad = TRUE;
- }
-
- if (!m_bPageLoadedOK) {
- if (!m_objs_array.GetSize()) {
- m_objs_array.RemoveAll();
- m_ObjectSet.clear();
-
- FX_SAFE_INT32 safePage = pdfium::base::checked_cast<int32_t>(dwPage);
- m_pPageDict = m_pDocument->GetPage(safePage.ValueOrDie());
- if (!m_pPageDict) {
- ResetFirstCheck(dwPage);
- return DataAvailable;
- }
-
- CFX_ArrayTemplate<CPDF_Object*> obj_array;
- obj_array.Add(m_pPageDict);
- FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
- if (!bRet)
- return DataNotAvailable;
-
- m_objs_array.RemoveAll();
- } else {
- CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
- FX_BOOL bRet =
- IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
-
- m_objs_array.RemoveAll();
- if (!bRet) {
- m_objs_array.Append(new_objs_array);
- return DataNotAvailable;
- }
- }
- m_bPageLoadedOK = TRUE;
- }
-
- if (!m_bAnnotsLoad) {
- if (!CheckPageAnnots(dwPage, pHints))
- return DataNotAvailable;
- m_bAnnotsLoad = TRUE;
- }
-
- if (m_pPageDict && !m_bNeedDownLoadResource) {
- m_pPageResource = m_pPageDict->GetObjectFor("Resources");
- m_bNeedDownLoadResource =
- m_pPageResource || HaveResourceAncestor(m_pPageDict);
- }
-
- if (m_bNeedDownLoadResource) {
- if (!CheckResources(pHints))
- return DataNotAvailable;
- m_bNeedDownLoadResource = FALSE;
- }
-
- m_bPageLoadedOK = FALSE;
- m_bAnnotsLoad = FALSE;
- m_bCurPageDictLoadOK = FALSE;
-
- ResetFirstCheck(dwPage);
- m_pagesLoadState.insert(dwPage);
- return DataAvailable;
-}
-
-FX_BOOL CPDF_DataAvail::CheckResources(DownloadHints* pHints) {
- if (!m_objs_array.GetSize()) {
- m_objs_array.RemoveAll();
- CFX_ArrayTemplate<CPDF_Object*> obj_array;
- obj_array.Add(m_pPageResource);
-
- FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
- if (bRet)
- m_objs_array.RemoveAll();
- return bRet;
- }
-
- CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
- FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
- m_objs_array.RemoveAll();
- if (!bRet)
- m_objs_array.Append(new_objs_array);
- return bRet;
-}
-
-void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE* pPos,
- uint32_t* pSize) {
- if (pPos)
- *pPos = m_dwLastXRefOffset;
- if (pSize)
- *pSize = (uint32_t)(m_dwFileLen - m_dwLastXRefOffset);
-}
-
-int CPDF_DataAvail::GetPageCount() const {
- if (m_pLinearized) {
- CPDF_Dictionary* pDict = m_pLinearized->GetDict();
- CPDF_Object* pObj = pDict ? pDict->GetDirectObjectFor("N") : nullptr;
- return pObj ? pObj->GetInteger() : 0;
- }
- return m_pDocument ? m_pDocument->GetPageCount() : 0;
-}
-
-CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) {
- if (!m_pDocument || index < 0 || index >= GetPageCount())
- return nullptr;
-
- if (m_pLinearized) {
- CPDF_Dictionary* pDict = m_pLinearized->GetDict();
- CPDF_Object* pObj = pDict ? pDict->GetDirectObjectFor("P") : nullptr;
-
- int pageNum = pObj ? pObj->GetInteger() : 0;
- if (m_pHintTables && index != pageNum) {
- FX_FILESIZE szPageStartPos = 0;
- FX_FILESIZE szPageLength = 0;
- uint32_t dwObjNum = 0;
- bool bPagePosGot = m_pHintTables->GetPagePos(index, &szPageStartPos,
- &szPageLength, &dwObjNum);
- if (!bPagePosGot)
- return nullptr;
-
- m_syntaxParser.InitParser(m_pFileRead, (uint32_t)szPageStartPos);
- CPDF_Object* pPageDict = ParseIndirectObjectAt(0, dwObjNum, m_pDocument);
- if (!pPageDict)
- return nullptr;
-
- if (!m_pDocument->ReplaceIndirectObjectIfHigherGeneration(dwObjNum,
- pPageDict)) {
- return nullptr;
- }
- return pPageDict->GetDict();
- }
- }
- return m_pDocument->GetPage(index);
-}
-
-CPDF_DataAvail::DocFormStatus CPDF_DataAvail::IsFormAvail(
- DownloadHints* pHints) {
- if (!m_pDocument)
- return FormAvailable;
-
- if (!m_bLinearizedFormParamLoad) {
- CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
- if (!pRoot)
- return FormAvailable;
-
- CPDF_Object* pAcroForm = pRoot->GetObjectFor("AcroForm");
- if (!pAcroForm)
- return FormNotExist;
-
- DocAvailStatus nDocStatus = CheckLinearizedData(pHints);
- if (nDocStatus == DataError)
- return FormError;
- if (nDocStatus == DataNotAvailable)
- return FormNotAvailable;
-
- if (!m_objs_array.GetSize())
- m_objs_array.Add(pAcroForm->GetDict());
- m_bLinearizedFormParamLoad = TRUE;
- }
-
- CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
- FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
- m_objs_array.RemoveAll();
- if (!bRet) {
- m_objs_array.Append(new_objs_array);
- return FormNotAvailable;
- }
- return FormAvailable;
-}
-
-CPDF_DataAvail::PageNode::PageNode() : m_type(PDF_PAGENODE_UNKNOWN) {}
-
-CPDF_DataAvail::PageNode::~PageNode() {
- for (int32_t i = 0; i < m_childNode.GetSize(); ++i)
- delete m_childNode[i];
- m_childNode.RemoveAll();
-}
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