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https://github.com/janeczku/calibre-web
synced 2024-12-19 06:30:29 +00:00
switched to using epub.min.js, deleted now unnecessary dependencies
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quarz12
parent
99c05650a1
commit
d0551274dc
1062
cps/static/js/libs/epub-cfi-resolver.js
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1062
cps/static/js/libs/epub-cfi-resolver.js
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Load Diff
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cps/static/js/libs/pako.min.js
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2
cps/static/js/libs/pako.min.js
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@ -1,160 +1,19 @@
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class EpubParser {
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constructor(filesList) {
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this.files = filesList;
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this.parser = new DOMParser();
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this.opfXml = this.getOPFXml();
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this.encoder = new TextEncoder();
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}
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getTotalByteLength() {
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let size = 0;
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for (let key of Object.keys(this.files)) {
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let file = this.files[key];
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if (file.name.endsWith("html")) {
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// console.log(file.name + " " + file._data.uncompressedSize)
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size += file._data.uncompressedSize;
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}
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}
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return size;
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}
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/**
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* gets file from files and returns decompressed content as string
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* @param {string} filename name of the file in filelist
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* @return {string} string representation of decompressed bytes
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*/
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decompress(filename) {
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return pako.inflate(this.files[filename]._data.compressedContent, {raw: true, to: "string"});
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}
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getOPFXml() {
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let content = this.decompress("META-INF/container.xml");
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let xml = this.parser.parseFromString(content, "text/xml");
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let path = xml.getElementsByTagName("rootfile")[0].getAttribute("full-path");
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this.opfDir = path.split("/").slice(0, -1).join("/");
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return this.parser.parseFromString(this.decompress(path), "text/xml");
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}
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getSpine() {
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return Array.from(this.opfXml.getElementsByTagName("spine")[0].children).map(node => node.getAttribute("idref"));
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}
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/**
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resolves an idref in content.opf to its file
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*/
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resolveIDref(idref) {
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return this.absPath(this.opfXml.getElementById(idref).getAttribute("href"));
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}
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/**
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* returns absolute path from path relative to content.opf
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* @param path
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*/
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absPath(path) {
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if (this.opfDir) {
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return [this.opfDir, path].join("/");
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} else {
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return path;
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}
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}
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/**
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returns the sum of the bytesize of all html files that are located before it in the spine
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@param {string} filepath path of the current file, also part of the CFI, e.g. here: #epubcfi(/6/2[titlepage]!/4/1:0) it would be "titlepage"
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*/
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getPreviousFilesSize(filepath) {
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let currentFile=this.getIdRef(filepath);
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let bytesize = 0;
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for (let file of this.getSpine()) {
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if (file !== currentFile) {
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let filepath = this.resolveIDref(file);
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//ignore non text files
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if (filepath.endsWith("html")) {
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// console.log(filepath + " " + bytesize)
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bytesize += this.files[filepath]._data.uncompressedSize;
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}
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} else {
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break;
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}
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}
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return bytesize;
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}
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getIdRef(filepath){
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return this.opfXml.querySelector(`[href="${filepath}"]`).getAttribute("id");
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}
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/**
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* resolves the given cfi to the xml node it points to
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* @param {string} cfistr epub-cfi string in the form: epubcfi(/6/16[id13]!/4[id2]/4/2[doc12]/1:0)
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* @return object with attributes "node" and "offset"
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*/
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cfiToXmlNode(cfistr) {
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let cfi = new CFI(cfistr);
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let cfiPath = cfistr.split("(")[1].split(")")[0];
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let fileId = cfiPath.split("!")[0].split("[")[1].split("]")[0];
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return cfi.resolveLast(this.parser.parseFromString(this.decompress(this.resolveIDref(fileId)),"text/xml"));
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}
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/**
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takes the node that the cfi points at and counts the bytes of all nodes before that
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*/
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getCurrentFileProgress(CFI) {
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let parse=this.cfiToXmlNode(CFI);
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let size=parse.offset;
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let startnode = parse.node//returns text node
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let xmlnsLength = startnode.parentNode.namespaceURI.length;
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let prev = startnode.parentNode.previousElementSibling;
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while (prev !== null) {
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size += this.encoder.encode(prev.outerHTML).length - xmlnsLength;
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prev = prev.previousElementSibling;
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}
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let parent = startnode.parentElement.parentElement;
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while (parent !== null) {
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let parentPrev = parent.previousElementSibling;
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while (parentPrev !== null) {
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size += this.encoder.encode(parentPrev.outerHTML).length - xmlnsLength;
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parentPrev = parentPrev.previousElementSibling;
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}
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parent = parent.parentElement;
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}
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return size;
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}
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/**
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* @param currentFile filepath
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* @param CFI
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* @return {number} percentage as decimal
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*/
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getProgress(currentFile, CFI) {
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let percentage = (this.getPreviousFilesSize(currentFile) + this.getCurrentFileProgress(CFI))/this.getTotalByteLength();
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if (percentage === Infinity) {
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return 0;
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} else if (percentage>1){
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return 1;
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}
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else{
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return percentage;
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}
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}
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}
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//wait until variable is assigned a value
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function waitFor(variable, callback) {
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const interval = setInterval(function() {
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if (variable!==undefined) {
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clearInterval(interval);
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callback();
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}
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}, 200);
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}
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/**
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* returns progress percentage
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* @return {number}
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* waits until queue is finished, meaning the book is done loading
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* @param callback
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*/
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function qFinished(callback){
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let timeout=setInterval(()=>{
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if(reader.rendition.q.running===undefined)
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clearInterval(timeout);
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callback();
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},300
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)
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}
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function calculateProgress(){
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let data=reader.rendition.currentLocation().end;
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return Math.round(epubParser.getProgress(data.href,data.cfi)*100);
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let data=reader.rendition.location.end;
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return Math.round(epub.locations.percentageFromCfi(data.cfi)*100);
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}
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// register new event emitter locationchange that fires on urlchange
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@ -179,13 +38,21 @@ function calculateProgress(){
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});
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})();
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var epubParser;
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waitFor(reader.book,()=>{
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epubParser = new EpubParser(reader.book.archive.zip.files);
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});
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let progressDiv=document.getElementById("progress");
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window.addEventListener('locationchange',()=>{
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let newPos=calculateProgress();
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progressDiv.textContent=newPos+"%";
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});
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var epub=ePub(calibre.bookUrl)
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let progressDiv=document.getElementById("progress");
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qFinished(()=>{
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epub.locations.generate().then(()=> {
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window.dispatchEvent(new Event('locationchange'))
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});
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})
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@ -152,8 +152,8 @@
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<script src="{{ url_for('static', filename='js/libs/screenfull.min.js') }}"></script>
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<script src="{{ url_for('static', filename='js/libs/reader.min.js') }}"></script>
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<script src="{{ url_for('static', filename='js/reading/epub.js') }}"></script>
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<script src="{{ url_for('static', filename='js/libs/epub.min.js') }}"></script>
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<script src="{{ url_for('static', filename='js/reading/epub-progress.js') }}"></script>
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<script src="{{ url_for('static', filename='js/libs/pako.min.js') }}"></script>
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<script src="{{ url_for('static', filename='js/libs/epub-cfi-resolver.js') }}"></script>
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</body>
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</html>
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