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73 lines
2.6 KiB
73 lines
2.6 KiB
#include "ContentHandler.h" |
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#include "Filter.h" |
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#include "FlateDecode.h" |
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#include <iostream> |
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#include <string> |
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#include <string.h> |
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using namespace merge_lib; |
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using namespace std; |
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//concatenate stream of all objects which contain Content of Page |
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void ContentHandler::_processObjectContent(unsigned int startOfPageElement) |
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{ |
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unsigned int endOfPage = _findEndOfElementContent(startOfPageElement); |
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_concatenatedStream = _retrieveStreamContent(_page, startOfPageElement, endOfPage); |
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FlateDecode flate; |
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flate.encode(_concatenatedStream); |
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} |
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//write concatenated stream to Page object |
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void ContentHandler::_changeObjectContent(unsigned int startOfPageElement) |
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{ |
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unsigned int endOfPage = _findEndOfElementContent(startOfPageElement); |
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_page->forgetAboutChildren(startOfPageElement, endOfPage); |
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_page->eraseContent(startOfPageElement, endOfPage - startOfPageElement); |
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unsigned int endOfObjectDescription = _pageContent.rfind(">>"); |
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const char * length = "/Filter /FlateDecode\n/Length "; |
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unsigned int sizeOfLength = strlen(length); |
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_page->insertToContent(endOfObjectDescription, length, sizeOfLength); |
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_page->insertToContent(endOfObjectDescription + sizeOfLength, Utils::uIntToStr(_concatenatedStream.size()).c_str()); |
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_page->appendContent("\nstream\n"); |
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_page->appendContent(_concatenatedStream); |
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_page->appendContent("endstream\n"); |
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_page->forgetStreamInFile(); |
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} |
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//get content of stream |
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// object - object with stream |
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//leftBound - left bound of object's content |
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//rightBound - right bound of object's content |
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string ContentHandler::_retrieveStreamContent(merge_lib::Object * object, unsigned int leftBound, unsigned int rightBound) |
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{ |
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return (object->hasStream()) ? |
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_getStreamFromContent(object) : |
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_getStreamFromReferencies(object, leftBound, rightBound); |
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} |
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//get stream from Array elements |
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string ContentHandler::_getStreamFromReferencies(merge_lib::Object * objectWithArray, unsigned int leftBound, unsigned int rightBound) |
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{ |
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std::string result; |
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std::vector<Object *> referencies = objectWithArray->getSortedByPositionChildren(leftBound, rightBound); |
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for(size_t i = 0; i < referencies.size(); ++i) |
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{ |
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result.append(_retrieveStreamContent(referencies[i], 0, referencies[i]->getObjectContent().size())); |
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} |
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objectWithArray->forgetAboutChildren(leftBound,rightBound); |
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return result; |
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} |
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//get stream from Object |
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string ContentHandler::_getStreamFromContent(merge_lib::Object * objectWithStream) |
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{ |
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Filter filter(objectWithStream); |
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string decodedStream; |
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filter.getDecodedStream(decodedStream); |
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return decodedStream; |
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}
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