mirror of
https://github.com/geometer/FBReaderJ.git
synced 2025-10-04 02:09:35 +02:00
89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
/*
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* Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <ZLFileImage.h>
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#include "FB2CoverReader.h"
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#include "../../library/Book.h"
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FB2CoverReader::FB2CoverReader(const ZLFile &file) : myFile(file) {
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}
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shared_ptr<ZLImage> FB2CoverReader::readCover() {
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myReadCoverPage = false;
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myLookForImage = false;
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myImageId.erase();
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myImageStart = -1;
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readDocument(myFile);
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return myImage;
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}
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void FB2CoverReader::startElementHandler(int tag, const char **attributes) {
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switch (tag) {
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case _COVERPAGE:
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myReadCoverPage = true;
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break;
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case _IMAGE:
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if (myReadCoverPage) {
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const std::string hrefName = xlinkNamespace() + ":href";
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const char *ref = attributeValue(attributes, hrefName.c_str());
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if (ref != 0 && *ref == '#' && *(ref + 1) != '\0') {
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myImageId = ref + 1;
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}
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}
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break;
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case _BINARY:
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{
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const char *id = attributeValue(attributes, "id");
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const char *contentType = attributeValue(attributes, "content-type");
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if (id != 0 && contentType != 0 && myImageId == id) {
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myLookForImage = true;
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}
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}
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}
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}
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void FB2CoverReader::endElementHandler(int tag) {
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switch (tag) {
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case _COVERPAGE:
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myReadCoverPage = false;
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break;
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case _DESCRIPTION:
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if (myImageId.empty()) {
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interrupt();
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}
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break;
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case _BINARY:
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if (!myImageId.empty() && myImageStart >= 0) {
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myImage = new ZLFileImage(myFile, "base64", myImageStart, getCurrentPosition() - myImageStart);
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interrupt();
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}
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break;
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}
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}
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void FB2CoverReader::characterDataHandler(const char *text, size_t len) {
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if (len > 0 && myLookForImage) {
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myImageStart = getCurrentPosition();
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myLookForImage = false;
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}
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}
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