mirror of
https://github.com/alexadam/save-as-ebook.git
synced 2025-09-05 15:09:08 +00:00
201 lines
7.2 KiB
JavaScript
201 lines
7.2 KiB
JavaScript
var cssFileName = 'ebook.css';
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var ebookTitle = null;
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chrome.runtime.onMessage.addListener((obj, sender, sendResponse) => {
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if (obj.shortcut && obj.shortcut === 'build-ebook') {
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buildEbook(obj.response);
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} else if (obj.alert) {
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console.log(obj.alert);
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alert(obj.alert);
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}
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return true;
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})
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function getImagesIndex(allImages) {
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return allImages.reduce(function(prev, elem, index) {
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return prev + '\n' + '<item href="images/' + elem.filename + '" id="img' + elem.filename + '" media-type="image/' + getImageType(elem.filename) + '"/>';
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}, '');
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}
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function getExternalLinksIndex() { // TODO
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return allExternalLinks.reduce(function(prev, elem, index) {
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return prev + '\n' + '<item href="' + elem + '" />';
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}, '');
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}
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function buildEbookFromChapters() {
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getEbookTitle(function (title) {
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ebookTitle = title;
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if (!ebookTitle || ebookTitle.trim().length === 0) {
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ebookTitle = 'eBook';
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}
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getEbookPages(_buildEbook);
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})
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}
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// FIXME remove - keep one function
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function buildEbook(allPages, fromMenu=false) {
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_buildEbook(allPages, fromMenu);
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}
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// http://ebooks.stackexchange.com/questions/1183/what-is-the-minimum-required-content-for-a-valid-epub
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function _buildEbook(allPages, fromMenu=false) {
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allPages = allPages.filter(function(page) {
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return page !== null;
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});
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console.log('Prepare Content...');
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var ebookFileName = 'eBook.epub';
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if (ebookTitle) {
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// ~TODO a pre-processing function to apply escapeXMLChars to all page.titles
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ebookName = escapeXMLChars(ebookTitle);
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ebookFileName = getEbookFileName(removeSpecialChars(ebookTitle)) + '.epub';
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} else {
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ebookName = escapeXMLChars(allPages[0].title);
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ebookFileName = getEbookFileName(removeSpecialChars(allPages[0].title)) + '.epub';
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}
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var zip = new JSZip();
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zip.file('mimetype', 'application/epub+zip');
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var metaInfFolder = zip.folder("META-INF");
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metaInfFolder.file('container.xml',
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'<?xml version="1.0"?>' +
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'<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">' +
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'<rootfiles>' +
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'<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>' +
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'</rootfiles>' +
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'</container>'
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);
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var oebps = zip.folder("OEBPS");
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oebps.file('toc.xhtml',
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'<?xml version="1.0" encoding="utf-8"?>' +
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'<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">' +
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'<head>' +
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'<title>toc.xhtml</title>' +
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'<link href="' + cssFileName + '" rel="stylesheet" type="text/css" />' +
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'</head>' +
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'<body>' +
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'<nav id="toc" epub:type="toc">' +
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'<h1 class="frontmatter">Table of Contents</h1>' +
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'<ol class="contents">' +
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allPages.reduce(function(prev, page) {
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var tmpPageTitle = escapeXMLChars(page.title);
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return prev + '\n' + '<li><a href="pages/' + page.url + '">' + tmpPageTitle + '</a></li>';
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}, '') +
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'</ol>' +
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'</nav>' +
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'</body>' +
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'</html>'
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);
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oebps.file('toc.ncx',
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'<?xml version="1.0" encoding="UTF-8" ?>' +
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'<ncx version="2005-1" xml:lang="en" xmlns="http://www.daisy.org/z3986/2005/ncx/">' +
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'<head>' +
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'<meta name="dtb:uid" content="isbn"/>' +
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'<meta name="dtb:depth" content="1"/>' +
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'</head>' +
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'<docTitle>' +
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'<text>' + ebookName + '</text>' +
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'</docTitle>' +
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'<navMap>' +
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allPages.reduce(function(prev, page, index) {
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var tmpPageTitle = escapeXMLChars(page.title);
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return prev + '\n' +
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'<navPoint id="ebook' + index + '" playOrder="' + (index + 1) + '">' +
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'<navLabel><text>' + tmpPageTitle + '</text></navLabel>' +
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'<content src="pages/' + page.url + '" />' +
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'</navPoint>';
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}, '') +
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'</navMap>' +
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'</ncx>'
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);
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oebps.file(cssFileName, ''); //TODO
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var styleFolder = oebps.folder('style');
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allPages.forEach(function(page) {
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styleFolder.file(page.styleFileName, page.styleFileContent);
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});
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var pagesFolder = oebps.folder('pages');
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allPages.forEach(function(page) {
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var tmpPageTitle = escapeXMLChars(page.title);
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pagesFolder.file(page.url,
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'<?xml version="1.0" encoding="utf-8"?>' +
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'<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">' +
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'<head>' +
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'<title>' + tmpPageTitle+ '</title>' +
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'<link href="../style/' + page.styleFileName + '" rel="stylesheet" type="text/css" />' +
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'</head><body>' +
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page.content +
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'</body></html>'
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);
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});
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oebps.file('content.opf',
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'<?xml version="1.0" encoding="UTF-8" ?>' +
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'<package xmlns="http://www.idpf.org/2007/opf" xmlns:dc="http://purl.org/dc/elements/1.1/" unique-identifier="db-id" version="3.0">' +
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'<metadata>' +
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'<dc:title id="t1">'+ ebookName + '</dc:title>' +
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'<dc:identifier id="db-id">isbn</dc:identifier>' +
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'<meta property="dcterms:modified">' + new Date().toISOString().replace(/\.[0-9]+Z/i, 'Z') + '</meta>' +
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'<dc:language>en</dc:language>' +
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'</metadata>' +
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'<manifest>' +
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'<item id="toc" properties="nav" href="toc.xhtml" media-type="application/xhtml+xml" />' +
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'<item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml" />' +
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'<item id="template_css" href="' + cssFileName + '" media-type="text/css" />' +
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allPages.reduce(function(prev, page, index) {
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return prev + '\n' + '<item id="ebook' + index + '" href="pages/' + page.url + '" media-type="application/xhtml+xml" />';
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}, '') +
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allPages.reduce(function(prev, page, index) {
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return prev + '\n' + '<item id="style' + index + '" href="style/' + page.styleFileName + '" media-type="text/css" />';
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}, '') +
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allPages.reduce(function(prev, page, index) {
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return prev + '\n' + getImagesIndex(page.images);
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}, '') +
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'</manifest>' +
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'<spine toc="ncx">' +
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allPages.reduce(function(prev, page, index) {
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return prev + '\n' + '<itemref idref="ebook' + index + '" />';
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}, '') +
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'</spine>' +
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'</package>'
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);
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///////////////
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try {
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let imgsFolder = oebps.folder("images");
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allPages.forEach(function(page) {
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for (let i = 0; i < page.images.length; i++) {
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let tmpImg = page.images[i]
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if (tmpImg.isBinary) {
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imgsFolder.file(tmpImg.filename, tmpImg.data, {binary: true})
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} else {
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imgsFolder.file(tmpImg.filename, tmpImg.data, {base64: true})
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}
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}
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});
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} catch (error) {
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console.log(error);
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}
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zip.generateAsync({
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type: "blob"
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})
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.then(function(content) {
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console.log("done !");
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saveAs(content, ebookFileName);
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chrome.runtime.sendMessage({
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type: "done"
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}, (response) => {});
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});
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}
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