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