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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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84
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)
@ -79,34 +80,89 @@ 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
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;
parent = parent.parentElement;
}
return size;
}
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)