Philip P. Moltmann | 4d3acf4 | 2017-03-20 11:05:52 -0700 | [diff] [blame^] | 1 | // Copyright 2014 PDFium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| 6 | |
| 7 | #include "public/fpdf_save.h" |
| 8 | |
| 9 | #include <memory> |
| 10 | #include <utility> |
| 11 | #include <vector> |
| 12 | |
| 13 | #include "core/fpdfapi/edit/cpdf_creator.h" |
| 14 | #include "core/fpdfapi/parser/cpdf_array.h" |
| 15 | #include "core/fpdfapi/parser/cpdf_document.h" |
| 16 | #include "core/fpdfapi/parser/cpdf_reference.h" |
| 17 | #include "core/fpdfapi/parser/cpdf_stream_acc.h" |
| 18 | #include "core/fpdfapi/parser/cpdf_string.h" |
| 19 | #include "core/fxcrt/fx_ext.h" |
| 20 | #include "fpdfsdk/fsdk_define.h" |
| 21 | #include "public/fpdf_edit.h" |
| 22 | |
| 23 | #ifdef PDF_ENABLE_XFA |
| 24 | #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h" |
| 25 | #include "fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h" |
| 26 | #include "public/fpdf_formfill.h" |
| 27 | #include "xfa/fxfa/cxfa_eventparam.h" |
| 28 | #include "xfa/fxfa/xfa_checksum.h" |
| 29 | #include "xfa/fxfa/xfa_ffapp.h" |
| 30 | #include "xfa/fxfa/xfa_ffdocview.h" |
| 31 | #include "xfa/fxfa/xfa_ffwidgethandler.h" |
| 32 | #endif |
| 33 | |
| 34 | #if _FX_OS_ == _FX_ANDROID_ |
| 35 | #include <time.h> |
| 36 | #else |
| 37 | #include <ctime> |
| 38 | #endif |
| 39 | |
| 40 | class CFX_IFileWrite final : public IFX_WriteStream { |
| 41 | public: |
| 42 | static CFX_RetainPtr<CFX_IFileWrite> Create(); |
| 43 | bool Init(FPDF_FILEWRITE* pFileWriteStruct); |
| 44 | bool WriteBlock(const void* pData, size_t size) override; |
| 45 | |
| 46 | protected: |
| 47 | CFX_IFileWrite(); |
| 48 | ~CFX_IFileWrite() override {} |
| 49 | |
| 50 | FPDF_FILEWRITE* m_pFileWriteStruct; |
| 51 | }; |
| 52 | |
| 53 | CFX_RetainPtr<CFX_IFileWrite> CFX_IFileWrite::Create() { |
| 54 | return CFX_RetainPtr<CFX_IFileWrite>(new CFX_IFileWrite()); |
| 55 | } |
| 56 | |
| 57 | CFX_IFileWrite::CFX_IFileWrite() : m_pFileWriteStruct(nullptr) {} |
| 58 | |
| 59 | bool CFX_IFileWrite::Init(FPDF_FILEWRITE* pFileWriteStruct) { |
| 60 | if (!pFileWriteStruct) |
| 61 | return false; |
| 62 | |
| 63 | m_pFileWriteStruct = pFileWriteStruct; |
| 64 | return true; |
| 65 | } |
| 66 | |
| 67 | bool CFX_IFileWrite::WriteBlock(const void* pData, size_t size) { |
| 68 | if (!m_pFileWriteStruct) |
| 69 | return false; |
| 70 | |
| 71 | m_pFileWriteStruct->WriteBlock(m_pFileWriteStruct, pData, size); |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | namespace { |
| 76 | |
| 77 | #ifdef PDF_ENABLE_XFA |
| 78 | bool SaveXFADocumentData( |
| 79 | CPDFXFA_Context* pContext, |
| 80 | std::vector<CFX_RetainPtr<IFX_SeekableStream>>* fileList) { |
| 81 | if (!pContext) |
| 82 | return false; |
| 83 | |
| 84 | if (pContext->GetDocType() != DOCTYPE_DYNAMIC_XFA && |
| 85 | pContext->GetDocType() != DOCTYPE_STATIC_XFA) |
| 86 | return true; |
| 87 | |
| 88 | CXFA_FFDocView* pXFADocView = pContext->GetXFADocView(); |
| 89 | if (!pXFADocView) |
| 90 | return true; |
| 91 | |
| 92 | CPDF_Document* pPDFDocument = pContext->GetPDFDoc(); |
| 93 | if (!pPDFDocument) |
| 94 | return false; |
| 95 | |
| 96 | CPDF_Dictionary* pRoot = pPDFDocument->GetRoot(); |
| 97 | if (!pRoot) |
| 98 | return false; |
| 99 | |
| 100 | CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm"); |
| 101 | if (!pAcroForm) |
| 102 | return false; |
| 103 | |
| 104 | CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA"); |
| 105 | if (!pXFA) |
| 106 | return true; |
| 107 | |
| 108 | CPDF_Array* pArray = pXFA->AsArray(); |
| 109 | if (!pArray) |
| 110 | return false; |
| 111 | |
| 112 | int size = pArray->GetCount(); |
| 113 | int iFormIndex = -1; |
| 114 | int iDataSetsIndex = -1; |
| 115 | int iTemplate = -1; |
| 116 | int iLast = size - 2; |
| 117 | for (int i = 0; i < size - 1; i++) { |
| 118 | CPDF_Object* pPDFObj = pArray->GetObjectAt(i); |
| 119 | if (!pPDFObj->IsString()) |
| 120 | continue; |
| 121 | if (pPDFObj->GetString() == "form") |
| 122 | iFormIndex = i + 1; |
| 123 | else if (pPDFObj->GetString() == "datasets") |
| 124 | iDataSetsIndex = i + 1; |
| 125 | else if (pPDFObj->GetString() == "template") |
| 126 | iTemplate = i + 1; |
| 127 | } |
| 128 | std::unique_ptr<CXFA_ChecksumContext> pChecksum(new CXFA_ChecksumContext); |
| 129 | pChecksum->StartChecksum(); |
| 130 | |
| 131 | // template |
| 132 | if (iTemplate > -1) { |
| 133 | CPDF_Stream* pTemplateStream = pArray->GetStreamAt(iTemplate); |
| 134 | CPDF_StreamAcc streamAcc; |
| 135 | streamAcc.LoadAllData(pTemplateStream); |
| 136 | uint8_t* pData = (uint8_t*)streamAcc.GetData(); |
| 137 | uint32_t dwSize2 = streamAcc.GetSize(); |
| 138 | CFX_RetainPtr<IFX_SeekableStream> pTemplate = |
| 139 | IFX_MemoryStream::Create(pData, dwSize2); |
| 140 | pChecksum->UpdateChecksum(pTemplate); |
| 141 | } |
| 142 | CPDF_Stream* pFormStream = nullptr; |
| 143 | CPDF_Stream* pDataSetsStream = nullptr; |
| 144 | if (iFormIndex != -1) { |
| 145 | // Get form CPDF_Stream |
| 146 | CPDF_Object* pFormPDFObj = pArray->GetObjectAt(iFormIndex); |
| 147 | if (pFormPDFObj->IsReference()) { |
| 148 | CPDF_Object* pFormDirectObj = pFormPDFObj->GetDirect(); |
| 149 | if (pFormDirectObj && pFormDirectObj->IsStream()) { |
| 150 | pFormStream = (CPDF_Stream*)pFormDirectObj; |
| 151 | } |
| 152 | } else if (pFormPDFObj->IsStream()) { |
| 153 | pFormStream = (CPDF_Stream*)pFormPDFObj; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | if (iDataSetsIndex != -1) { |
| 158 | // Get datasets CPDF_Stream |
| 159 | CPDF_Object* pDataSetsPDFObj = pArray->GetObjectAt(iDataSetsIndex); |
| 160 | if (pDataSetsPDFObj->IsReference()) { |
| 161 | CPDF_Reference* pDataSetsRefObj = (CPDF_Reference*)pDataSetsPDFObj; |
| 162 | CPDF_Object* pDataSetsDirectObj = pDataSetsRefObj->GetDirect(); |
| 163 | if (pDataSetsDirectObj && pDataSetsDirectObj->IsStream()) { |
| 164 | pDataSetsStream = (CPDF_Stream*)pDataSetsDirectObj; |
| 165 | } |
| 166 | } else if (pDataSetsPDFObj->IsStream()) { |
| 167 | pDataSetsStream = (CPDF_Stream*)pDataSetsPDFObj; |
| 168 | } |
| 169 | } |
| 170 | // L"datasets" |
| 171 | { |
| 172 | CFX_RetainPtr<IFX_SeekableStream> pDsfileWrite = IFX_MemoryStream::Create(); |
| 173 | if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Datasets, pDsfileWrite, |
| 174 | nullptr) && |
| 175 | pDsfileWrite->GetSize() > 0) { |
| 176 | // Datasets |
| 177 | pChecksum->UpdateChecksum(pDsfileWrite); |
| 178 | pChecksum->FinishChecksum(); |
| 179 | auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>( |
| 180 | pPDFDocument->GetByteStringPool()); |
| 181 | if (iDataSetsIndex != -1) { |
| 182 | if (pDataSetsStream) { |
| 183 | pDataSetsStream->InitStreamFromFile(pDsfileWrite, |
| 184 | std::move(pDataDict)); |
| 185 | } |
| 186 | } else { |
| 187 | CPDF_Stream* pData = pPDFDocument->NewIndirect<CPDF_Stream>(); |
| 188 | pData->InitStreamFromFile(pDsfileWrite, std::move(pDataDict)); |
| 189 | iLast = pArray->GetCount() - 2; |
| 190 | pArray->InsertNewAt<CPDF_String>(iLast, "datasets", false); |
| 191 | pArray->InsertNewAt<CPDF_Reference>(iLast + 1, pPDFDocument, |
| 192 | pData->GetObjNum()); |
| 193 | } |
| 194 | fileList->push_back(std::move(pDsfileWrite)); |
| 195 | } |
| 196 | } |
| 197 | // L"form" |
| 198 | { |
| 199 | CFX_RetainPtr<IFX_SeekableStream> pfileWrite = IFX_MemoryStream::Create(); |
| 200 | if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Form, pfileWrite, |
| 201 | pChecksum.get()) && |
| 202 | pfileWrite->GetSize() > 0) { |
| 203 | auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>( |
| 204 | pPDFDocument->GetByteStringPool()); |
| 205 | if (iFormIndex != -1) { |
| 206 | if (pFormStream) |
| 207 | pFormStream->InitStreamFromFile(pfileWrite, std::move(pDataDict)); |
| 208 | } else { |
| 209 | CPDF_Stream* pData = pPDFDocument->NewIndirect<CPDF_Stream>(); |
| 210 | pData->InitStreamFromFile(pfileWrite, std::move(pDataDict)); |
| 211 | iLast = pArray->GetCount() - 2; |
| 212 | pArray->InsertNewAt<CPDF_String>(iLast, "form", false); |
| 213 | pArray->InsertNewAt<CPDF_Reference>(iLast + 1, pPDFDocument, |
| 214 | pData->GetObjNum()); |
| 215 | } |
| 216 | fileList->push_back(std::move(pfileWrite)); |
| 217 | } |
| 218 | } |
| 219 | return true; |
| 220 | } |
| 221 | |
| 222 | bool SendPostSaveToXFADoc(CPDFXFA_Context* pContext) { |
| 223 | if (!pContext) |
| 224 | return false; |
| 225 | |
| 226 | if (pContext->GetDocType() != DOCTYPE_DYNAMIC_XFA && |
| 227 | pContext->GetDocType() != DOCTYPE_STATIC_XFA) |
| 228 | return true; |
| 229 | |
| 230 | CXFA_FFDocView* pXFADocView = pContext->GetXFADocView(); |
| 231 | if (!pXFADocView) |
| 232 | return false; |
| 233 | |
| 234 | CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler(); |
| 235 | std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator( |
| 236 | pXFADocView->CreateWidgetAccIterator()); |
| 237 | while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) { |
| 238 | CXFA_EventParam preParam; |
| 239 | preParam.m_eType = XFA_EVENT_PostSave; |
| 240 | pWidgetHander->ProcessEvent(pWidgetAcc, &preParam); |
| 241 | } |
| 242 | pXFADocView->UpdateDocView(); |
| 243 | pContext->ClearChangeMark(); |
| 244 | return true; |
| 245 | } |
| 246 | |
| 247 | bool SendPreSaveToXFADoc( |
| 248 | CPDFXFA_Context* pContext, |
| 249 | std::vector<CFX_RetainPtr<IFX_SeekableStream>>* fileList) { |
| 250 | if (pContext->GetDocType() != DOCTYPE_DYNAMIC_XFA && |
| 251 | pContext->GetDocType() != DOCTYPE_STATIC_XFA) |
| 252 | return true; |
| 253 | |
| 254 | CXFA_FFDocView* pXFADocView = pContext->GetXFADocView(); |
| 255 | if (!pXFADocView) |
| 256 | return true; |
| 257 | |
| 258 | CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler(); |
| 259 | std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator( |
| 260 | pXFADocView->CreateWidgetAccIterator()); |
| 261 | while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) { |
| 262 | CXFA_EventParam preParam; |
| 263 | preParam.m_eType = XFA_EVENT_PreSave; |
| 264 | pWidgetHander->ProcessEvent(pWidgetAcc, &preParam); |
| 265 | } |
| 266 | pXFADocView->UpdateDocView(); |
| 267 | return SaveXFADocumentData(pContext, fileList); |
| 268 | } |
| 269 | #endif // PDF_ENABLE_XFA |
| 270 | |
| 271 | bool FPDF_Doc_Save(FPDF_DOCUMENT document, |
| 272 | FPDF_FILEWRITE* pFileWrite, |
| 273 | FPDF_DWORD flags, |
| 274 | FPDF_BOOL bSetVersion, |
| 275 | int fileVerion) { |
| 276 | CPDF_Document* pPDFDoc = CPDFDocumentFromFPDFDocument(document); |
| 277 | if (!pPDFDoc) |
| 278 | return 0; |
| 279 | |
| 280 | #ifdef PDF_ENABLE_XFA |
| 281 | CPDFXFA_Context* pContext = static_cast<CPDFXFA_Context*>(document); |
| 282 | std::vector<CFX_RetainPtr<IFX_SeekableStream>> fileList; |
| 283 | SendPreSaveToXFADoc(pContext, &fileList); |
| 284 | #endif // PDF_ENABLE_XFA |
| 285 | |
| 286 | if (flags < FPDF_INCREMENTAL || flags > FPDF_REMOVE_SECURITY) |
| 287 | flags = 0; |
| 288 | |
| 289 | CPDF_Creator FileMaker(pPDFDoc); |
| 290 | if (bSetVersion) |
| 291 | FileMaker.SetFileVersion(fileVerion); |
| 292 | if (flags == FPDF_REMOVE_SECURITY) { |
| 293 | flags = 0; |
| 294 | FileMaker.RemoveSecurity(); |
| 295 | } |
| 296 | |
| 297 | CFX_RetainPtr<CFX_IFileWrite> pStreamWrite = CFX_IFileWrite::Create(); |
| 298 | pStreamWrite->Init(pFileWrite); |
| 299 | bool bRet = FileMaker.Create(pStreamWrite, flags); |
| 300 | #ifdef PDF_ENABLE_XFA |
| 301 | SendPostSaveToXFADoc(pContext); |
| 302 | #endif // PDF_ENABLE_XFA |
| 303 | return bRet; |
| 304 | } |
| 305 | |
| 306 | } // namespace |
| 307 | |
| 308 | DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveAsCopy(FPDF_DOCUMENT document, |
| 309 | FPDF_FILEWRITE* pFileWrite, |
| 310 | FPDF_DWORD flags) { |
| 311 | return FPDF_Doc_Save(document, pFileWrite, flags, false, 0); |
| 312 | } |
| 313 | |
| 314 | DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveWithVersion(FPDF_DOCUMENT document, |
| 315 | FPDF_FILEWRITE* pFileWrite, |
| 316 | FPDF_DWORD flags, |
| 317 | int fileVersion) { |
| 318 | return FPDF_Doc_Save(document, pFileWrite, flags, true, fileVersion); |
| 319 | } |