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/*
* Copyright (C) 2004-2012 Geometer Plus <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <ZLFileImage.h>
#include "FB2CoverReader.h"
#include "../../library/Book.h"
FB2CoverReader::FB2CoverReader(const ZLFile &file) : myFile(file) {
}
shared_ptr<const ZLImage> FB2CoverReader::readCover() {
myReadCoverPage = false;
myLookForImage = false;
myImageId.erase();
myImageStart = -1;
readDocument(myFile);
return myImage;
}
bool FB2CoverReader::processNamespaces() const {
return true;
}
void FB2CoverReader::startElementHandler(int tag, const char **attributes) {
switch (tag) {
case _COVERPAGE:
myReadCoverPage = true;
break;
case _IMAGE:
if (myReadCoverPage) {
const char *ref = attributeValue(attributes, myHrefPredicate);
if (ref != 0 && *ref == '#' && *(ref + 1) != '\0') {
myImageId = ref + 1;
}
}
break;
case _BINARY:
{
const char *id = attributeValue(attributes, "id");
const char *contentType = attributeValue(attributes, "content-type");
if (id != 0 && contentType != 0 && myImageId == id) {
myLookForImage = true;
}
}
}
}
void FB2CoverReader::endElementHandler(int tag) {
switch (tag) {
case _COVERPAGE:
myReadCoverPage = false;
break;
case _DESCRIPTION:
if (myImageId.empty()) {
interrupt();
}
break;
case _BINARY:
if (!myImageId.empty() && myImageStart >= 0) {
myImage = new ZLFileImage(myFile, myImageStart, getCurrentPosition() - myImageStart, ZLFileImage::ENCODING_BASE64);
interrupt();
}
break;
}
}
void FB2CoverReader::characterDataHandler(const char *text, std::size_t len) {
if (len > 0 && myLookForImage) {
myImageStart = getCurrentPosition();
myLookForImage = false;
}
}
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