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59 lines
1.9 KiB
59 lines
1.9 KiB
#if !defined AbstractBoxElementHandler_h
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#define AbstractBoxElementHandler_h
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#include "PageElementHandler.h"
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namespace merge_lib
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{
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//class for processing MediaBox field of Page object
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class AbstractBoxElementHandler: public PageElementHandler
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{
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public:
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AbstractBoxElementHandler(Object * page): PageElementHandler(page)
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{
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}
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virtual ~AbstractBoxElementHandler()
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{
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}
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protected:
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void _retrieveBoxFromParent()
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{
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std::string content = _page->getObjectContent();
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std::string mediaBox;
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Object * parent = _page;
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while(1)
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{
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unsigned int startOfParent = content.find("/Parent");
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unsigned int endOfParent = content.find(" R", startOfParent);
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if(startOfParent == std::string::npos)
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break;
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std::vector <Object *> parents = parent->getChildrenByBounds(startOfParent, endOfParent);
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if(parents.size() != 1)
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break;
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parent = parents[0];
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std::string parentContent = parent->getObjectContent();
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unsigned int startOfMediaBox = parentContent.find(_handlerName);
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if(startOfMediaBox == std::string::npos)
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{
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content = parentContent;
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continue;
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}
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unsigned int endOfMediaBox = parentContent.find("]", startOfMediaBox);
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mediaBox = parentContent.substr(startOfMediaBox, endOfMediaBox - startOfMediaBox + 1);
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break;
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}
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if(!mediaBox.empty())
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{
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unsigned int startOfMediaBox = _page->getObjectContent().rfind(">>");
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_page->insertToContent(startOfMediaBox, mediaBox);
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_changeObjectContent(startOfMediaBox);
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}
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}
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private:
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virtual void _changeObjectContent(unsigned int startOfPageElement) = 0;
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};
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}
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#endif
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