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Code Issues Releases Wiki Activity

implemented current file process, needs testing but looks good

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This commit is contained in:
quarz12 2023-05-18 22:37:09 +02:00
parent b25c024b66
commit dbac685985
1 changed files with 71 additions and 13 deletions
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80
cps/static/js/reading/epub-progress.js
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@ -20,6 +20,7 @@ class EpubParser {
}
/**
* gets file from files and returns decompressed content as string
* @param {string} filename name of the file in filelist
* @return {string} string representation of decompressed bytes
*/
@ -44,7 +45,7 @@ class EpubParser {
resolves an idref in content.opf to its file
*/
resolveIDref(idref) {
return this.opfXml.getElementById(idref).getAttribute("href");
return this.absPath(this.opfXml.getElementById(idref).getAttribute("href"));
}
/**
@ -67,7 +68,7 @@ class EpubParser {
let bytesize = 0;
for (let file of this.getSpine()) {
if (file !== currentFile) {
let filepath = this.absPath(this.resolveIDref(file));
let filepath = this.resolveIDref(file);
//ignore non text files
if (filepath.endsWith("html")) {
console.log(filepath + " " + bytesize)
@ -79,25 +80,80 @@ class EpubParser {
}
return bytesize;
}
cfiToXmlNode(file,cfi){
/**
* resolves the given cfi to the xml node it points to
* @param {string} cfi epub-cfi string in the form: epubcfi(/6/16[id13]!/4[id2]/4/2[doc12]/1:0)
* @return XML Text-Node
*/
cfiToXmlNode(cfi) {
let cfiPath = cfi.split("(")[1].split(")")[0];
let fileId = cfiPath.split("!")[0].split("[")[1].split("]")[0];
let xml = this.parser.parseFromString(this.decompress(this.resolveIDref(fileId)), "text/xml");
let components = cfiPath.split("!")[1].split("/").slice(1);
let currentNode = xml.getElementsByTagName("html")[0];
for (const component of components) {
this.validateChildNodes(currentNode);
console.log(currentNode);
console.log(component);
let index = 0;
if (component.includes("[")) {
index = parseInt(component.split("[")[0]) - 1;
currentNode = currentNode.childNodes[index];
console.assert(currentNode.getAttribute("id") === component.split("[")[1].split("]")[0], "failed to resolve node");
} else if (component.includes(":")) {
index = component.split(":")[0] - 1;
return currentNode.childNodes[index]; //exit point
} else {
index = parseInt(component);
currentNode = currentNode.childNodes[index - 1];
}
}
}
/**
* inserts missing text/element nodes to keep them alternating
* @param {*} parentNode
*/
validateChildNodes(parentNode) {
for (let index = 0; index < parentNode.childNodes.length;) {
const element = parentNode.childNodes[index];
if (index % 2 === 0 && element.nodeType === 1) {
element.parentNode.insertBefore(parentNode.ownerDocument.createTextNode(""), element);
continue;
}
if (index % 2 === 1 && element.nodeType === 3) {
element.insertBefore(parentNode.ownerDocument.createElement("")); //TODO check
continue;
}
index++;
}
}
/**
takes the node that the cfi points at and counts the bytes of all nodes before that
*/
getCurrentFileProgress(currentFile, CFI) {
let size = 0
let startnode = this.cfiToXmlNode(currentFile,CFI);
let prev = startnode.previousElementSibling;
getCurrentFileProgress(CFI) {
let size = parseInt(CFI.split(":")[1])//text offset in node
let startnode = this.cfiToXmlNode(CFI); //returns text node
let xmlnsLength = startnode.parentNode.namespaceURI.length;
let prev = startnode.parentNode.previousElementSibling;
while (prev !== null) {
size += this.encoder.encode(prev.outerHTML).length;
console.log("size: "+size)
console.log(prev.outerHTML)
console.log(this.encoder.encode(prev.outerHTML).length - xmlnsLength)
size += this.encoder.encode(prev.outerHTML).length - xmlnsLength;
prev = prev.previousElementSibling;
}
let parent = startnode.parentElement;
let parent = startnode.parentElement.parentElement;
while (parent !== null) {
let parentPrev = parent.previousElementSibling;
while (parentPrev !== null) {
size += this.encoder.encode(parentPrev.outerHTML).length;
console.log(parentPrev.outerHTML)
console.log(this.encoder.encode(parentPrev.outerHTML).length - xmlnsLength)
size += this.encoder.encode(parentPrev.outerHTML).length - xmlnsLength;
parentPrev = parentPrev.previousElementSibling;
}
parent = parent.parentElement;
@ -106,7 +162,7 @@ class EpubParser {
}
getProgress(currentFile, CFI) {
let percentage = this.getTotalByteLength() / (this.getPreviousFilesSize(currentFile) + this.getCurrentFileProgress(currentFile, CFI));
let percentage = this.getTotalByteLength() / (this.getPreviousFilesSize(currentFile) + this.getCurrentFileProgress(CFI));
if (percentage === Infinity) {
return 0;
} else {
@ -114,3 +170,5 @@ class EpubParser {
}
}
}
e = new EpubParser(reader.book.archive.zip.files)