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/*
* Copyright (C) 2008-2012 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 <map>
#include <ZLFile.h>
#include <ZLXMLReader.h>
#include <ZLUnicodeUtil.h>
#include "OEBTextStream.h"
#include "../util/MiscUtil.h"
#include "../util/XMLTextStream.h"
class XHTMLFilesCollector : public ZLXMLReader {
public:
XHTMLFilesCollector(std::vector<std::string> &xhtmlFileNames);
private:
void startElementHandler(const char *tag, const char **attributes);
void endElementHandler(const char *tag);
private:
std::vector<std::string> &myXHTMLFileNames;
std::map<std::string,std::string> myIdToHref;
enum {
READ_NONE,
READ_MANIFEST,
READ_SPINE
} myState;
};
XHTMLFilesCollector::XHTMLFilesCollector(std::vector<std::string> &xhtmlFileNames) : myXHTMLFileNames(xhtmlFileNames), myState(READ_NONE) {
}
static const std::string MANIFEST = "manifest";
static const std::string SPINE = "spine";
static const std::string ITEM = "item";
static const std::string ITEMREF = "itemref";
void XHTMLFilesCollector::startElementHandler(const char *tag, const char **xmlattributes) {
const std::string tagString = ZLUnicodeUtil::toLower(tag);
if (MANIFEST == tagString) {
myState = READ_MANIFEST;
} else if (SPINE == tagString) {
myState = READ_SPINE;
} else if ((myState == READ_MANIFEST) && (ITEM == tagString)) {
const char *id = attributeValue(xmlattributes, "id");
const char *href = attributeValue(xmlattributes, "href");
if ((id != 0) && (href != 0)) {
myIdToHref[id] = href;
}
} else if ((myState == READ_SPINE) && (ITEMREF == tagString)) {
const char *id = attributeValue(xmlattributes, "idref");
if (id != 0) {
const std::string &fileName = myIdToHref[id];
if (!fileName.empty()) {
myXHTMLFileNames.push_back(fileName);
}
}
}
}
void XHTMLFilesCollector::endElementHandler(const char *tag) {
if (SPINE == ZLUnicodeUtil::toLower(tag)) {
interrupt();
}
}
OEBTextStream::OEBTextStream(const ZLFile &opfFile) {
myFilePrefix = MiscUtil::htmlDirectoryPrefix(opfFile.path());
XHTMLFilesCollector(myXHTMLFileNames).readDocument(opfFile);
}
void OEBTextStream::resetToStart() {
myIndex = 0;
}
shared_ptr<ZLInputStream> OEBTextStream::nextStream() {
if (myIndex >= myXHTMLFileNames.size()) {
return 0;
}
ZLFile xhtmlFile(myFilePrefix + myXHTMLFileNames[myIndex++]);
return new XMLTextStream(xhtmlFile.inputStream(), "body");
}
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