implemented current file process, needs testing but looks good
This commit is contained in:
parent
b25c024b66
commit
dbac685985
|
@ -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
|
* @param {string} filename name of the file in filelist
|
||||||
* @return {string} string representation of decompressed bytes
|
* @return {string} string representation of decompressed bytes
|
||||||
*/
|
*/
|
||||||
|
@ -44,7 +45,7 @@ class EpubParser {
|
||||||
resolves an idref in content.opf to its file
|
resolves an idref in content.opf to its file
|
||||||
*/
|
*/
|
||||||
resolveIDref(idref) {
|
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;
|
let bytesize = 0;
|
||||||
for (let file of this.getSpine()) {
|
for (let file of this.getSpine()) {
|
||||||
if (file !== currentFile) {
|
if (file !== currentFile) {
|
||||||
let filepath = this.absPath(this.resolveIDref(file));
|
let filepath = this.resolveIDref(file);
|
||||||
//ignore non text files
|
//ignore non text files
|
||||||
if (filepath.endsWith("html")) {
|
if (filepath.endsWith("html")) {
|
||||||
console.log(filepath + " " + bytesize)
|
console.log(filepath + " " + bytesize)
|
||||||
|
@ -79,25 +80,80 @@ class EpubParser {
|
||||||
}
|
}
|
||||||
return bytesize;
|
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) {
|
getCurrentFileProgress(CFI) {
|
||||||
let size = 0
|
let size = parseInt(CFI.split(":")[1])//text offset in node
|
||||||
let startnode = this.cfiToXmlNode(currentFile,CFI);
|
let startnode = this.cfiToXmlNode(CFI); //returns text node
|
||||||
let prev = startnode.previousElementSibling;
|
let xmlnsLength = startnode.parentNode.namespaceURI.length;
|
||||||
|
let prev = startnode.parentNode.previousElementSibling;
|
||||||
while (prev !== null) {
|
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;
|
prev = prev.previousElementSibling;
|
||||||
}
|
}
|
||||||
let parent = startnode.parentElement;
|
let parent = startnode.parentElement.parentElement;
|
||||||
while (parent !== null) {
|
while (parent !== null) {
|
||||||
let parentPrev = parent.previousElementSibling;
|
let parentPrev = parent.previousElementSibling;
|
||||||
while (parentPrev !== null) {
|
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;
|
parentPrev = parentPrev.previousElementSibling;
|
||||||
}
|
}
|
||||||
parent = parent.parentElement;
|
parent = parent.parentElement;
|
||||||
|
@ -106,7 +162,7 @@ class EpubParser {
|
||||||
}
|
}
|
||||||
|
|
||||||
getProgress(currentFile, CFI) {
|
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) {
|
if (percentage === Infinity) {
|
||||||
return 0;
|
return 0;
|
||||||
} else {
|
} else {
|
||||||
|
@ -114,3 +170,5 @@ class EpubParser {
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
e = new EpubParser(reader.book.archive.zip.files)
|
||||||
|
|
Loading…
Reference in New Issue
Block a user