mirror of
https://github.com/geometer/FBReaderJ.git
synced 2025-10-05 02:39:23 +02:00
136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
/*
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* Copyright (C) 2009-2012 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 <ZLFile.h>
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#include <ZLFileImage.h>
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#include <ZLXMLNamespace.h>
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#include "OEBCoverReader.h"
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#include "XHTMLImageFinder.h"
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#include "../util/MiscUtil.h"
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OEBCoverReader::OEBCoverReader() {
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}
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shared_ptr<const ZLImage> OEBCoverReader::readCover(const ZLFile &file) {
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myPathPrefix = MiscUtil::htmlDirectoryPrefix(file.path());
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myReadState = READ_NOTHING;
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myImage.reset();
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myCoverXHTML.erase();
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readDocument(file);
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if (myImage.isNull() && !myCoverXHTML.empty()) {
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const ZLFile coverFile(myCoverXHTML);
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const std::string ext = coverFile.extension();
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if (ext == "gif" || ext == "jpeg" || ext == "jpg") {
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myImage = new ZLFileImage(coverFile, "", 0);
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} else {
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myImage = XHTMLImageFinder().readImage(coverFile);
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}
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}
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return myImage;
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}
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static const std::string METADATA = "metadata";
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static const std::string META = "meta";
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static const std::string MANIFEST = "manifest";
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static const std::string ITEM = "item";
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static const std::string GUIDE = "guide";
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static const std::string REFERENCE = "reference";
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static const std::string COVER = "cover";
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static const std::string COVER_IMAGE = "other.ms-coverimage-standard";
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bool OEBCoverReader::processNamespaces() const {
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return true;
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}
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void OEBCoverReader::startElementHandler(const char *tag, const char **attributes) {
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switch (myReadState) {
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case READ_NOTHING:
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if (GUIDE == tag) {
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myReadState = READ_GUIDE;
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} else if (MANIFEST == tag && !myCoverId.empty()) {
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myReadState = READ_MANIFEST;
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} else if (testTag(ZLXMLNamespace::OpenPackagingFormat, METADATA, tag)) {
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myReadState = READ_METADATA;
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}
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break;
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case READ_GUIDE:
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if (REFERENCE == tag) {
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const char *type = attributeValue(attributes, "type");
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if (type != 0) {
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if (COVER == type) {
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const char *href = attributeValue(attributes, "href");
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if (href != 0) {
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myCoverXHTML = myPathPrefix + MiscUtil::decodeHtmlURL(href);
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interrupt();
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}
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} else if (COVER_IMAGE == type) {
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createImage(attributeValue(attributes, "href"));
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}
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}
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}
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break;
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case READ_METADATA:
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if (testTag(ZLXMLNamespace::OpenPackagingFormat, META, tag)) {
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const char *name = attributeValue(attributes, "name");
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if (name != 0 && COVER == name) {
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myCoverId = attributeValue(attributes, "content");
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}
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}
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break;
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case READ_MANIFEST:
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if (ITEM == tag) {
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const char *id = attributeValue(attributes, "id");
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if (id != 0 && myCoverId == id) {
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createImage(attributeValue(attributes, "href"));
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}
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}
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break;
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}
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}
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void OEBCoverReader::createImage(const char *href) {
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if (href != 0) {
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myImage = new ZLFileImage(ZLFile(myPathPrefix + MiscUtil::decodeHtmlURL(href)), "", 0);
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interrupt();
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}
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}
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void OEBCoverReader::endElementHandler(const char *tag) {
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switch (myReadState) {
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case READ_NOTHING:
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break;
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case READ_GUIDE:
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if (GUIDE == tag) {
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myReadState = READ_NOTHING;
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}
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break;
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case READ_METADATA:
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if (testTag(ZLXMLNamespace::OpenPackagingFormat, METADATA, tag)) {
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myReadState = READ_NOTHING;
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}
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break;
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case READ_MANIFEST:
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if (MANIFEST == tag) {
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myReadState = READ_NOTHING;
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}
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break;
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}
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}
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