| // 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 |
| |
| #include "xfa/fxfa/cxfa_ffdoc.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <vector> |
| |
| #include "core/fpdfapi/parser/cpdf_array.h" |
| #include "core/fpdfapi/parser/cpdf_document.h" |
| #include "core/fpdfapi/parser/fpdf_parser_decode.h" |
| #include "core/fpdfdoc/cpdf_nametree.h" |
| #include "core/fxcrt/cfx_checksumcontext.h" |
| #include "core/fxcrt/cfx_memorystream.h" |
| #include "core/fxcrt/fx_extension.h" |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/xml/cfx_xmlelement.h" |
| #include "core/fxcrt/xml/cfx_xmlnode.h" |
| #include "third_party/base/ptr_util.h" |
| #include "xfa/fwl/cfwl_notedriver.h" |
| #include "xfa/fxfa/cxfa_ffapp.h" |
| #include "xfa/fxfa/cxfa_ffdocview.h" |
| #include "xfa/fxfa/cxfa_ffnotify.h" |
| #include "xfa/fxfa/cxfa_ffwidget.h" |
| #include "xfa/fxfa/cxfa_fileread.h" |
| #include "xfa/fxfa/cxfa_fontmgr.h" |
| #include "xfa/fxfa/parser/cxfa_dataexporter.h" |
| #include "xfa/fxfa/parser/cxfa_dataimporter.h" |
| #include "xfa/fxfa/parser/cxfa_document.h" |
| #include "xfa/fxfa/parser/cxfa_node.h" |
| |
| namespace { |
| |
| struct FX_BASE64DATA { |
| uint32_t data1 : 2; |
| uint32_t data2 : 6; |
| uint32_t data3 : 4; |
| uint32_t data4 : 4; |
| uint32_t data5 : 6; |
| uint32_t data6 : 2; |
| uint32_t data7 : 8; |
| }; |
| |
| const uint8_t kStartValuesRemoved = 43; |
| const uint8_t kDecoderMapSize = 80; |
| const uint8_t g_FXBase64DecoderMap[kDecoderMapSize] = { |
| 0x3E, 0xFF, 0xFF, 0xFF, 0x3F, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, |
| 0x3B, 0x3C, 0x3D, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x01, |
| 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, |
| 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, |
| 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, |
| 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, |
| }; |
| |
| uint8_t base64DecoderValue(uint8_t val) { |
| if (val < kStartValuesRemoved || val >= kStartValuesRemoved + kDecoderMapSize) |
| return 0xFF; |
| return g_FXBase64DecoderMap[val - kStartValuesRemoved]; |
| } |
| |
| void Base64DecodePiece(const char src[4], |
| int32_t iChars, |
| FX_BASE64DATA& dst, |
| int32_t& iBytes) { |
| ASSERT(iChars > 0 && iChars < 5); |
| iBytes = 1; |
| dst.data2 = base64DecoderValue(static_cast<uint8_t>(src[0])); |
| if (iChars > 1) { |
| uint8_t b = base64DecoderValue(static_cast<uint8_t>(src[1])); |
| dst.data1 = b >> 4; |
| dst.data4 = b; |
| if (iChars > 2) { |
| iBytes = 2; |
| b = base64DecoderValue(static_cast<uint8_t>(src[2])); |
| dst.data3 = b >> 2; |
| dst.data6 = b; |
| if (iChars > 3) { |
| iBytes = 3; |
| dst.data5 = base64DecoderValue(static_cast<uint8_t>(src[3])); |
| } else { |
| dst.data5 = 0; |
| } |
| } else { |
| dst.data3 = 0; |
| } |
| } else { |
| dst.data1 = 0; |
| } |
| } |
| |
| int32_t Base64DecodeW(const wchar_t* pSrc, int32_t iSrcLen, uint8_t* pDst) { |
| ASSERT(pSrc); |
| if (iSrcLen < 1) { |
| return 0; |
| } |
| while (iSrcLen > 0 && pSrc[iSrcLen - 1] == '=') { |
| iSrcLen--; |
| } |
| if (iSrcLen < 1) { |
| return 0; |
| } |
| if (!pDst) { |
| int32_t iDstLen = iSrcLen / 4 * 3; |
| iSrcLen %= 4; |
| if (iSrcLen == 1) { |
| iDstLen += 1; |
| } else if (iSrcLen == 2) { |
| iDstLen += 1; |
| } else if (iSrcLen == 3) { |
| iDstLen += 2; |
| } |
| return iDstLen; |
| } |
| char srcData[4]; |
| FX_BASE64DATA dstData; |
| int32_t iChars = 4, iBytes; |
| uint8_t* pDstEnd = pDst; |
| while (iSrcLen > 0) { |
| if (iSrcLen > 3) { |
| srcData[0] = (char)*pSrc++; |
| srcData[1] = (char)*pSrc++; |
| srcData[2] = (char)*pSrc++; |
| srcData[3] = (char)*pSrc++; |
| iSrcLen -= 4; |
| } else { |
| *((uint32_t*)&dstData) = 0; |
| *((uint32_t*)srcData) = 0; |
| srcData[0] = (char)*pSrc++; |
| if (iSrcLen > 1) { |
| srcData[1] = (char)*pSrc++; |
| } |
| if (iSrcLen > 2) { |
| srcData[2] = (char)*pSrc++; |
| } |
| iChars = iSrcLen; |
| iSrcLen = 0; |
| } |
| Base64DecodePiece(srcData, iChars, dstData, iBytes); |
| *pDstEnd++ = ((uint8_t*)&dstData)[0]; |
| if (iBytes > 1) { |
| *pDstEnd++ = ((uint8_t*)&dstData)[1]; |
| } |
| if (iBytes > 2) { |
| *pDstEnd++ = ((uint8_t*)&dstData)[2]; |
| } |
| } |
| return pDstEnd - pDst; |
| } |
| |
| } // namespace |
| |
| CXFA_FFDoc::CXFA_FFDoc(CXFA_FFApp* pApp, IXFA_DocEnvironment* pDocEnvironment) |
| : m_pDocEnvironment(pDocEnvironment), |
| m_pDocumentParser(nullptr), |
| m_pApp(pApp), |
| m_pNotify(nullptr), |
| m_pPDFDoc(nullptr), |
| m_dwDocType(XFA_DocType::Static) {} |
| |
| CXFA_FFDoc::~CXFA_FFDoc() { |
| CloseDoc(); |
| } |
| |
| int32_t CXFA_FFDoc::StartLoad() { |
| m_pNotify = pdfium::MakeUnique<CXFA_FFNotify>(this); |
| m_pDocumentParser = pdfium::MakeUnique<CXFA_DocumentParser>(m_pNotify.get()); |
| return m_pDocumentParser->StartParse(m_pStream, XFA_XDPPACKET_XDP); |
| } |
| |
| bool XFA_GetPDFContentsFromPDFXML(CFX_XMLNode* pPDFElement, |
| uint8_t*& pByteBuffer, |
| int32_t& iBufferSize) { |
| CFX_XMLElement* pDocumentElement = nullptr; |
| for (CFX_XMLNode* pXMLNode = |
| pPDFElement->GetNodeItem(CFX_XMLNode::FirstChild); |
| pXMLNode; pXMLNode = pXMLNode->GetNodeItem(CFX_XMLNode::NextSibling)) { |
| if (pXMLNode->GetType() == FX_XMLNODE_Element) { |
| CFX_XMLElement* pXMLElement = static_cast<CFX_XMLElement*>(pXMLNode); |
| CFX_WideString wsTagName = pXMLElement->GetName(); |
| if (wsTagName == L"document") { |
| pDocumentElement = pXMLElement; |
| break; |
| } |
| } |
| } |
| if (!pDocumentElement) { |
| return false; |
| } |
| CFX_XMLElement* pChunkElement = nullptr; |
| for (CFX_XMLNode* pXMLNode = |
| pDocumentElement->GetNodeItem(CFX_XMLNode::FirstChild); |
| pXMLNode; pXMLNode = pXMLNode->GetNodeItem(CFX_XMLNode::NextSibling)) { |
| if (pXMLNode->GetType() == FX_XMLNODE_Element) { |
| CFX_XMLElement* pXMLElement = static_cast<CFX_XMLElement*>(pXMLNode); |
| CFX_WideString wsTagName = pXMLElement->GetName(); |
| if (wsTagName == L"chunk") { |
| pChunkElement = pXMLElement; |
| break; |
| } |
| } |
| } |
| if (!pChunkElement) { |
| return false; |
| } |
| CFX_WideString wsPDFContent = pChunkElement->GetTextData(); |
| iBufferSize = |
| Base64DecodeW(wsPDFContent.c_str(), wsPDFContent.GetLength(), nullptr); |
| pByteBuffer = FX_Alloc(uint8_t, iBufferSize + 1); |
| pByteBuffer[iBufferSize] = '0'; // FIXME: I bet this is wrong. |
| Base64DecodeW(wsPDFContent.c_str(), wsPDFContent.GetLength(), pByteBuffer); |
| return true; |
| } |
| void XFA_XPDPacket_MergeRootNode(CXFA_Node* pOriginRoot, CXFA_Node* pNewRoot) { |
| CXFA_Node* pChildNode = pNewRoot->GetNodeItem(XFA_NODEITEM_FirstChild); |
| while (pChildNode) { |
| CXFA_Node* pOriginChild = |
| pOriginRoot->GetFirstChildByName(pChildNode->GetNameHash()); |
| if (pOriginChild) { |
| pChildNode = pChildNode->GetNodeItem(XFA_NODEITEM_NextSibling); |
| } else { |
| CXFA_Node* pNextSibling = |
| pChildNode->GetNodeItem(XFA_NODEITEM_NextSibling); |
| pNewRoot->RemoveChild(pChildNode); |
| pOriginRoot->InsertChild(pChildNode); |
| pChildNode = pNextSibling; |
| pNextSibling = nullptr; |
| } |
| } |
| } |
| |
| int32_t CXFA_FFDoc::DoLoad() { |
| int32_t iStatus = m_pDocumentParser->DoParse(); |
| if (iStatus == XFA_PARSESTATUS_Done && !m_pPDFDoc) |
| return XFA_PARSESTATUS_SyntaxErr; |
| return iStatus; |
| } |
| |
| void CXFA_FFDoc::StopLoad() { |
| m_pApp->GetXFAFontMgr()->LoadDocFonts(this); |
| m_dwDocType = XFA_DocType::Static; |
| CXFA_Node* pConfig = ToNode( |
| m_pDocumentParser->GetDocument()->GetXFAObject(XFA_HASHCODE_Config)); |
| if (!pConfig) |
| return; |
| |
| CXFA_Node* pAcrobat = pConfig->GetFirstChildByClass(XFA_Element::Acrobat); |
| if (!pAcrobat) |
| return; |
| |
| CXFA_Node* pAcrobat7 = pAcrobat->GetFirstChildByClass(XFA_Element::Acrobat7); |
| if (!pAcrobat7) |
| return; |
| |
| CXFA_Node* pDynamicRender = |
| pAcrobat7->GetFirstChildByClass(XFA_Element::DynamicRender); |
| if (!pDynamicRender) |
| return; |
| |
| CFX_WideString wsType; |
| if (pDynamicRender->TryContent(wsType) && wsType == L"required") |
| m_dwDocType = XFA_DocType::Dynamic; |
| } |
| |
| CXFA_FFDocView* CXFA_FFDoc::CreateDocView() { |
| if (!m_DocView) |
| m_DocView = pdfium::MakeUnique<CXFA_FFDocView>(this); |
| |
| return m_DocView.get(); |
| } |
| |
| CXFA_FFDocView* CXFA_FFDoc::GetDocView(CXFA_LayoutProcessor* pLayout) { |
| return m_DocView && m_DocView->GetXFALayout() == pLayout ? m_DocView.get() |
| : nullptr; |
| } |
| |
| CXFA_FFDocView* CXFA_FFDoc::GetDocView() { |
| return m_DocView.get(); |
| } |
| |
| bool CXFA_FFDoc::OpenDoc(const CFX_RetainPtr<IFX_SeekableStream>& pStream) { |
| m_pStream = pStream; |
| return true; |
| } |
| |
| bool CXFA_FFDoc::OpenDoc(CPDF_Document* pPDFDoc) { |
| if (!pPDFDoc) |
| return false; |
| |
| CPDF_Dictionary* pRoot = pPDFDoc->GetRoot(); |
| if (!pRoot) |
| return false; |
| |
| CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm"); |
| if (!pAcroForm) |
| return false; |
| |
| CPDF_Object* pElementXFA = pAcroForm->GetDirectObjectFor("XFA"); |
| if (!pElementXFA) |
| return false; |
| |
| std::vector<CPDF_Stream*> xfaStreams; |
| if (pElementXFA->IsArray()) { |
| CPDF_Array* pXFAArray = (CPDF_Array*)pElementXFA; |
| for (size_t i = 0; i < pXFAArray->GetCount() / 2; i++) { |
| if (CPDF_Stream* pStream = pXFAArray->GetStreamAt(i * 2 + 1)) |
| xfaStreams.push_back(pStream); |
| } |
| } else if (pElementXFA->IsStream()) { |
| xfaStreams.push_back((CPDF_Stream*)pElementXFA); |
| } |
| if (xfaStreams.empty()) |
| return false; |
| |
| m_pPDFDoc = pPDFDoc; |
| m_pStream = pdfium::MakeRetain<CXFA_FileRead>(xfaStreams); |
| return true; |
| } |
| |
| void CXFA_FFDoc::CloseDoc() { |
| if (m_DocView) { |
| m_DocView->RunDocClose(); |
| m_DocView.reset(); |
| } |
| CXFA_Document* doc = |
| m_pDocumentParser ? m_pDocumentParser->GetDocument() : nullptr; |
| if (doc) |
| doc->ClearLayoutData(); |
| |
| m_pNotify.reset(); |
| m_pApp->GetXFAFontMgr()->ReleaseDocFonts(this); |
| m_HashToDibDpiMap.clear(); |
| m_pApp->ClearEventTargets(); |
| } |
| |
| CFX_RetainPtr<CFX_DIBitmap> CXFA_FFDoc::GetPDFNamedImage( |
| const CFX_WideStringC& wsName, |
| int32_t& iImageXDpi, |
| int32_t& iImageYDpi) { |
| if (!m_pPDFDoc) |
| return nullptr; |
| |
| uint32_t dwHash = FX_HashCode_GetW(wsName, false); |
| auto it = m_HashToDibDpiMap.find(dwHash); |
| if (it != m_HashToDibDpiMap.end()) { |
| iImageXDpi = it->second.iImageXDpi; |
| iImageYDpi = it->second.iImageYDpi; |
| return it->second.pDibSource.As<CFX_DIBitmap>(); |
| } |
| |
| CPDF_Dictionary* pRoot = m_pPDFDoc->GetRoot(); |
| if (!pRoot) |
| return nullptr; |
| |
| CPDF_Dictionary* pNames = pRoot->GetDictFor("Names"); |
| if (!pNames) |
| return nullptr; |
| |
| CPDF_Dictionary* pXFAImages = pNames->GetDictFor("XFAImages"); |
| if (!pXFAImages) |
| return nullptr; |
| |
| CPDF_NameTree nametree(pXFAImages); |
| CPDF_Object* pObject = nametree.LookupValue(CFX_WideString(wsName)); |
| if (!pObject) { |
| for (size_t i = 0; i < nametree.GetCount(); i++) { |
| CFX_WideString wsTemp; |
| CPDF_Object* pTempObject = nametree.LookupValueAndName(i, &wsTemp); |
| if (wsTemp == wsName) { |
| pObject = pTempObject; |
| break; |
| } |
| } |
| } |
| |
| CPDF_Stream* pStream = ToStream(pObject); |
| if (!pStream) |
| return nullptr; |
| |
| auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream); |
| pAcc->LoadAllData(); |
| |
| CFX_RetainPtr<IFX_SeekableStream> pImageFileRead = |
| pdfium::MakeRetain<CFX_MemoryStream>( |
| const_cast<uint8_t*>(pAcc->GetData()), pAcc->GetSize(), false); |
| |
| CFX_RetainPtr<CFX_DIBitmap> pDibSource = XFA_LoadImageFromBuffer( |
| pImageFileRead, FXCODEC_IMAGE_UNKNOWN, iImageXDpi, iImageYDpi); |
| m_HashToDibDpiMap[dwHash] = {pDibSource, iImageXDpi, iImageYDpi}; |
| return pDibSource; |
| } |
| |
| bool CXFA_FFDoc::SavePackage(XFA_HashCode code, |
| const CFX_RetainPtr<IFX_SeekableStream>& pFile, |
| CFX_ChecksumContext* pCSContext) { |
| CXFA_Document* doc = m_pDocumentParser->GetDocument(); |
| auto pExport = pdfium::MakeUnique<CXFA_DataExporter>(doc); |
| CXFA_Node* pNode = code == XFA_HASHCODE_Xfa ? doc->GetRoot() |
| : ToNode(doc->GetXFAObject(code)); |
| if (!pNode) |
| return !!pExport->Export(pFile); |
| |
| CFX_ByteString bsChecksum; |
| if (pCSContext) |
| bsChecksum = pCSContext->GetChecksum(); |
| |
| return !!pExport->Export( |
| pFile, pNode, 0, bsChecksum.GetLength() ? bsChecksum.c_str() : nullptr); |
| } |
| |
| bool CXFA_FFDoc::ImportData(const CFX_RetainPtr<IFX_SeekableStream>& pStream, |
| bool bXDP) { |
| auto importer = |
| pdfium::MakeUnique<CXFA_DataImporter>(m_pDocumentParser->GetDocument()); |
| return importer->ImportData(pStream); |
| } |