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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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