bool OleMainStream::readParagraphStyleTable(const char *headerBuffer, const OleEntry &tableEntry) {
//PlcBtePapx structure is table with formatting for all paragraphs
unsigned int beginParagraphInfo = OleUtil::getU4Bytes(headerBuffer, 0x102); // address of PlcBtePapx structure
std::size_t paragraphInfoLength = (std::size_t)OleUtil::getU4Bytes(headerBuffer, 0x106); // length of PlcBtePapx structure
if (paragraphInfoLength < 4) {
return false;
}
OleStream tableStream(myStorage, tableEntry, myBaseStream);
std::string buffer;
if (!readToBuffer(buffer, beginParagraphInfo, paragraphInfoLength, tableStream)) {
return false;
}
static const unsigned int PAPX_SIZE = 4;
std::size_t size = calcCountOfPLC(paragraphInfoLength, PAPX_SIZE);
std::vector<unsigned int> paragraphBlocks;
for (std::size_t index = 0, tOffset = (size + 1) * 4; index < size; ++index, tOffset += PAPX_SIZE) {
paragraphBlocks.push_back(OleUtil::getU4Bytes(buffer.c_str(), tOffset));
}
char *formatPageBuffer = new char[OleStorage::BBD_BLOCK_SIZE];
for (std::size_t index = 0; index < paragraphBlocks.size(); ++index) {
seek(paragraphBlocks.at(index) * OleStorage::BBD_BLOCK_SIZE, true);
if (read(formatPageBuffer, OleStorage::BBD_BLOCK_SIZE) != OleStorage::BBD_BLOCK_SIZE) {
return false;
}
const unsigned int paragraphsCount = OleUtil::getU1Byte(formatPageBuffer, 0x1ff); //offset with 'cpara' value (count of paragraphs)
for (unsigned int index2 = 0; index2 < paragraphsCount; ++index2) {
const unsigned int offset = OleUtil::getU4Bytes(formatPageBuffer, index2 * 4);
unsigned int papxOffset = OleUtil::getU1Byte(formatPageBuffer, (paragraphsCount + 1) * 4 + index2 * 13) * 2;
if (papxOffset <= 0) {
continue;
}
unsigned int len = OleUtil::getU1Byte(formatPageBuffer, papxOffset) * 2;
if (len == 0) {
++papxOffset;
len = OleUtil::getU1Byte(formatPageBuffer, papxOffset) * 2;
}
const unsigned int styleId = OleUtil::getU2Bytes(formatPageBuffer, papxOffset + 1);
Style styleInfo = getStyleFromStylesheet(styleId, myStyleSheet);
if (len >= 3) {
getStyleInfo(papxOffset, formatPageBuffer + 3, len - 3, styleInfo);
}
unsigned int charPos = 0;
if (!offsetToCharPos(offset, charPos, myPieces)) {
continue;
}
myStyleInfoList.push_back(CharPosToStyle(charPos, styleInfo));
}
}
delete[] formatPageBuffer;
return true;
}
bool OleMainStream::readCharInfoTable(const char *headerBuffer, const OleEntry &tableEntry) {
//PlcfbteChpx structure is table with formatting for particular run of text
unsigned int beginCharInfo = OleUtil::getU4Bytes(headerBuffer, 0xfa); // address of PlcfbteChpx structure
std::size_t charInfoLength = (std::size_t)OleUtil::getU4Bytes(headerBuffer, 0xfe); // length of PlcfbteChpx structure
if (charInfoLength < 4) {
return false;
}
OleStream tableStream(myStorage, tableEntry, myBaseStream);
std::string buffer;
if (!readToBuffer(buffer, beginCharInfo, charInfoLength, tableStream)) {
return false;
}
static const unsigned int CHPX_SIZE = 4;
std::size_t size = calcCountOfPLC(charInfoLength, CHPX_SIZE);
std::vector<unsigned int> charBlocks;
for (std::size_t index = 0, offset = (size + 1) * 4; index < size; ++index, offset += CHPX_SIZE) {
charBlocks.push_back(OleUtil::getU4Bytes(buffer.c_str(), offset));
}
char *formatPageBuffer = new char[OleStorage::BBD_BLOCK_SIZE];
for (std::size_t index = 0; index < charBlocks.size(); ++index) {
seek(charBlocks.at(index) * OleStorage::BBD_BLOCK_SIZE, true);
if (read(formatPageBuffer, OleStorage::BBD_BLOCK_SIZE) != OleStorage::BBD_BLOCK_SIZE) {
return false;
}
unsigned int crun = OleUtil::getU1Byte(formatPageBuffer, 0x1ff); //offset with crun (count of 'run of text')
for (unsigned int index2 = 0; index2 < crun; ++index2) {
unsigned int offset = OleUtil::getU4Bytes(formatPageBuffer, index2 * 4);
unsigned int chpxOffset = 2 * OleUtil::getU1Byte(formatPageBuffer, (crun + 1) * 4 + index2);
unsigned int len = OleUtil::getU1Byte(formatPageBuffer, chpxOffset);
unsigned int charPos = 0;
if (!offsetToCharPos(offset, charPos, myPieces)) {
continue;
}
unsigned int styleId = getStyleIdByCharPos(charPos, myStyleInfoList);
CharInfo charInfo = getStyleFromStylesheet(styleId, myStyleSheet).CurrentCharInfo;
if (chpxOffset != 0) {
getCharInfo(chpxOffset, styleId, formatPageBuffer + 1, len - 1, charInfo);
}
myCharInfoList.push_back(CharPosToCharInfo(charPos, charInfo));
if (chpxOffset != 0) {
InlineImageInfo pictureInfo;
if (getInlineImageInfo(chpxOffset, formatPageBuffer + 1, len - 1, pictureInfo)) {
myInlineImageInfoList.push_back(CharPosToInlineImageInfo(charPos, pictureInfo));
}
}
}
}
delete[] formatPageBuffer;
return true;
}
bool OleMainStream::readFloatingImages(const char *headerBuffer, const OleEntry &tableEntry) {
//Plcspa structure is a table with information for FSPA (File Shape Address)
unsigned int beginPicturesInfo = OleUtil::getU4Bytes(headerBuffer, 0x01DA); // address of Plcspa structure
if (beginPicturesInfo == 0) {
return true; //there's no office art objects
}
unsigned int picturesInfoLength = OleUtil::getU4Bytes(headerBuffer, 0x01DE); // length of Plcspa structure
if (picturesInfoLength < 4) {
return false;
}
OleStream tableStream(myStorage, tableEntry, myBaseStream);
std::string buffer;
if (!readToBuffer(buffer, beginPicturesInfo, picturesInfoLength, tableStream)) {
return false;
}
static const unsigned int SPA_SIZE = 26;
size_t size = calcCountOfPLC(picturesInfoLength, SPA_SIZE);
std::vector<unsigned int> picturesBlocks;
for (size_t index = 0, tOffset = 0; index < size; ++index, tOffset += 4) {
picturesBlocks.push_back(OleUtil::getU4Bytes(buffer.c_str(), tOffset));
}
for (size_t index = 0, tOffset = (size + 1) * 4; index < size; ++index, tOffset += SPA_SIZE) {
unsigned int spid = OleUtil::getU4Bytes(buffer.c_str(), tOffset);
FloatImageInfo info;
unsigned int charPos = picturesBlocks.at(index);
info.ShapeId = spid;
myFloatImageInfoList.push_back(CharPosToFloatImageInfo(charPos, info));
}
//DggInfo structure is office art object table data
unsigned int beginOfficeArtContent = OleUtil::getU4Bytes(headerBuffer, 0x22A); // address of DggInfo structure
if (beginOfficeArtContent == 0) {
return true; //there's no office art objects
}
unsigned int officeArtContentLength = OleUtil::getU4Bytes(headerBuffer, 0x022E); // length of DggInfo structure
if (officeArtContentLength < 4) {
return false;
}
shared_ptr<OleStream> newTableStream = new OleStream(myStorage, tableEntry, myBaseStream);
shared_ptr<OleStream> newMainStream = new OleStream(myStorage, myOleEntry, myBaseStream);
if (newTableStream->open() && newMainStream->open()) {
myFLoatImageReader = new DocFloatImageReader(beginOfficeArtContent, officeArtContentLength, newTableStream, newMainStream);
myFLoatImageReader->readAll();
}
return true;
}
bool OleMainStream::readSectionsInfoTable(const char *headerBuffer, const OleEntry &tableEntry) {
//PlcfSed structure is a section table
unsigned int beginOfText = OleUtil::getU4Bytes(headerBuffer, 0x18); //address of text's begin in main stream
unsigned int beginSectInfo = OleUtil::getU4Bytes(headerBuffer, 0xca); //address if PlcfSed structure
std::size_t sectInfoLen = (std::size_t)OleUtil::getU4Bytes(headerBuffer, 0xce); //length of PlcfSed structure
if (sectInfoLen < 4) {
return false;
}
OleStream tableStream(myStorage, tableEntry, myBaseStream);
std::string buffer;
if (!readToBuffer(buffer, beginSectInfo, sectInfoLen, tableStream)) {
return false;
}
static const unsigned int SED_SIZE = 12;
std::size_t decriptorsCount = calcCountOfPLC(sectInfoLen, SED_SIZE);
//saving the section offsets (in character positions)
std::vector<unsigned int> charPos;
for (std::size_t index = 0, tOffset = 0; index < decriptorsCount; ++index, tOffset += 4) {
unsigned int ulTextOffset = OleUtil::getU4Bytes(buffer.c_str(), tOffset);
charPos.push_back(beginOfText + ulTextOffset);
}
//saving sepx offsets
std::vector<unsigned int> sectPage;
for (std::size_t index = 0, tOffset = (decriptorsCount + 1) * 4; index < decriptorsCount; ++index, tOffset += SED_SIZE) {
sectPage.push_back(OleUtil::getU4Bytes(buffer.c_str(), tOffset + 2));
}
//reading the section properties
char tmpBuffer[2];
for (std::size_t index = 0; index < sectPage.size(); ++index) {
if (sectPage.at(index) == 0xffffffffUL) { //check for invalid record, to make default section info
SectionInfo sectionInfo;
sectionInfo.CharPosition = charPos.at(index);
mySectionInfoList.push_back(sectionInfo);
continue;
}
//getting number of bytes to read
if (!seek(sectPage.at(index), true)) {
continue;
}
if (read(tmpBuffer, 2) != 2) {
continue;
}
std::size_t bytes = 2 + (std::size_t)OleUtil::getU2Bytes(tmpBuffer, 0);
if (!seek(sectPage.at(index), true)) {
continue;
}
char *formatPageBuffer = new char[bytes];
if (read(formatPageBuffer, bytes) != bytes) {
delete[] formatPageBuffer;
continue;
}
SectionInfo sectionInfo;
sectionInfo.CharPosition = charPos.at(index);
getSectionInfo(formatPageBuffer + 2, bytes - 2, sectionInfo);
mySectionInfoList.push_back(sectionInfo);
delete[] formatPageBuffer;
}
return true;
}
bool OleMainStream::readBookmarks(const char *headerBuffer, const OleEntry &tableEntry) {
//SttbfBkmk structure is a table of bookmark name strings
unsigned int beginNamesInfo = OleUtil::getU4Bytes(headerBuffer, 0x142); // address of SttbfBkmk structure
std::size_t namesInfoLength = (std::size_t)OleUtil::getU4Bytes(headerBuffer, 0x146); // length of SttbfBkmk structure
if (namesInfoLength == 0) {
return true; //there's no bookmarks
}
OleStream tableStream(myStorage, tableEntry, myBaseStream);
std::string buffer;
if (!readToBuffer(buffer, beginNamesInfo, namesInfoLength, tableStream)) {
return false;
}
unsigned int recordsNumber = OleUtil::getU2Bytes(buffer.c_str(), 0x2); //count of records
std::vector<std::string> names;
unsigned int offset = 0x6; //initial offset
for (unsigned int i = 0; i < recordsNumber; ++i) {
if (buffer.size() < offset + 2) {
ZLLogger::Instance().println("DocPlugin", "problmes with reading bookmarks names");
break;
}
unsigned int length = OleUtil::getU2Bytes(buffer.c_str(), offset) * 2; //length of string in bytes
ZLUnicodeUtil::Ucs2String name;
for (unsigned int j = 0; j < length; j+=2) {
char ch1 = buffer.at(offset + 2 + j);
char ch2 = buffer.at(offset + 2 + j + 1);
ZLUnicodeUtil::Ucs2Char ucs2Char = (unsigned int)ch1 | ((unsigned int)ch2 << 8);
name.push_back(ucs2Char);
}
std::string utf8Name;
ZLUnicodeUtil::ucs2ToUtf8(utf8Name, name);
names.push_back(utf8Name);
offset += length + 2;
}
//plcfBkmkf structure is table recording beginning CPs of bookmarks
unsigned int beginCharPosInfo = OleUtil::getU4Bytes(headerBuffer, 0x14A); // address of plcfBkmkf structure
std::size_t charPosInfoLen = (std::size_t)OleUtil::getU4Bytes(headerBuffer, 0x14E); // length of plcfBkmkf structure
if (charPosInfoLen == 0) {
return true; //there's no bookmarks
}
if (!readToBuffer(buffer, beginCharPosInfo, charPosInfoLen, tableStream)) {
return false;
}
static const unsigned int BKF_SIZE = 4;
std::size_t size = calcCountOfPLC(charPosInfoLen, BKF_SIZE);
std::vector<unsigned int> charPage;
for (std::size_t index = 0, offset = 0; index < size; ++index, offset += 4) {
charPage.push_back(OleUtil::getU4Bytes(buffer.c_str(), offset));
}
for (std::size_t i = 0; i < names.size(); ++i) {
if (i >= charPage.size()) {
break; //for the case if something in these structures goes wrong, to not to lose all bookmarks
}
Bookmark bookmark;
bookmark.CharPosition = charPage.at(i);
bookmark.Name = names.at(i);
myBookmarks.push_back(bookmark);
}
return true;
}
