From 99c05650a123180378d877eb9ec4b0b7701a4ac0 Mon Sep 17 00:00:00 2001 From: quarz12 Date: Wed, 24 May 2023 21:05:50 +0200 Subject: [PATCH] -added pako and epub-cfi-resolver as dependencies -cfi resolving is now done by that module, therefore removed validateChildNodes and adjusted cfiToXmlNode --- cps/static/js/libs/epub-cfi-resolver.js | 1062 +++++++++++++++++++++++ cps/static/js/libs/pako.min.js | 2 + cps/static/js/reading/epub-progress.js | 89 +- cps/templates/read.html | 1 + 4 files changed, 1088 insertions(+), 66 deletions(-) create mode 100644 cps/static/js/libs/epub-cfi-resolver.js create mode 100644 cps/static/js/libs/pako.min.js diff --git a/cps/static/js/libs/epub-cfi-resolver.js b/cps/static/js/libs/epub-cfi-resolver.js new file mode 100644 index 00000000..20f4da9c --- /dev/null +++ b/cps/static/js/libs/epub-cfi-resolver.js @@ -0,0 +1,1062 @@ +'use strict'; +// https://github.com/fread-ink/epub-cfi-resolver +// If using node.js +if(typeof Node === 'undefined') { + var ELEMENT_NODE = 1; + var TEXT_NODE = 3; + var CDATA_SECTION_NODE = 4; +} else { // In the browser + var ELEMENT_NODE = Node.ELEMENT_NODE; + var TEXT_NODE = Node.TEXT_NODE; + var CDATA_SECTION_NODE = Node.CDATA_SECTION_NODE; +} + +function cfiEscape(str) { + return str.replace(/[\[\]\^,();]/g, "^$&"); +} + +// Get indices of all matches of regExp in str +// if `add` is non-null, add it to the matched indices +function matchAll(str, regExp, add) { + add = add || 0; + var matches = []; + var offset = 0; + var m; + do { + m = str.match(regExp); + if(!m) break + matches.push(m.index + add); + offset += m.index + m.length; + str = str.slice(m.index + m.length); + } while(offset < str.length); + + return matches; +} + +// Get the number in a that has the smallest diff to n +function closest(a, n) { + var minDiff; + var closest; + var i, diff; + for(i=0; i < a.length; i++) { + diff = Math.abs(a[i] - n); + if(!i || diff < minDiff) { + diff = minDiff; + closest = a[i]; + } + } + return closest; +} + +// Given a set of nodes that are all children +// and a reference to one of those nodes +// calculate the count/index of the node +// according to the CFI spec. +// Also re-calculate offset if supplied and relevant +function calcSiblingCount(nodes, n, offset) { + var count = 0; + var lastWasElement; + var prevOffset = 0; + var firstNode = true; + var i, node; + for(i=0; i < nodes.length; i++) { + node = nodes[i]; + if(node.nodeType === ELEMENT_NODE) { + if(lastWasElement || firstNode) { + count += 2; + firstNode = false; + } else { + count++; + } + + if(n === node) { + if(node.tagName.toLowerCase() === 'img') { + return {count, offset}; + } else { + return {count}; + } + } + prevOffset = 0; + lastWasElement = true; + } else if (node.nodeType === TEXT_NODE || + node.nodeType === CDATA_SECTION_NODE) { + if(lastWasElement || firstNode) { + count++; + firstNode = false; + } + + if(n === node) { + return {count, offset: offset + prevOffset}; + } + + prevOffset += node.textContent.length; + lastWasElement = false; + } else { + continue; + } + } + throw new Error("The specified node was not found in the array of siblings"); +} + +function compareTemporal(a, b) { + const isA = (typeof a === 'number'); + const isB = (typeof b === 'number'); + + if(!isA && !isB) return 0; + if(!isA && isB) return -1; + if(isA && !isB) return 1; + + return (a || 0.0) - (b || 0.0); +} + +function compareSpatial(a, b) { + if(!a && !b) return 0; + if(!a && b) return -1; + if(a && !b) return 1; + + var diff = (a.y || 0) - (b.y || 0); + if(diff) return diff; + + return (a.x || 0) - (b.x || 0); +} + +class CFI { + + constructor(str, opts) { + this.opts = Object.assign({ + // If CFI is a Simple Range, pretend it isn't + // by parsing only the start of the range + flattenRange: false, + // Strip temporal, spatial, offset and textLocationAssertion + // from places where they don't make sense + stricter: true + }, opts || {}); + + this.cfi = str; + const isCFI = new RegExp(/^epubcfi\((.*)\)$/); + + str = str.trim(); + var m = str.match(isCFI); + if(!m) throw new Error("Not a valid CFI"); + if(m.length < 2) return; // Empty CFI + + str = m[1]; + this.parts = []; + + var parsed, offset, newDoc; + var subParts = []; + var sawComma = 0; + while(str.length) { + ({parsed, offset, newDoc} = this.parse(str)); + if(!parsed || offset === null) throw new Error("Parsing failed"); + if(sawComma && newDoc) throw new Error("CFI is a range that spans multiple documents. This is not allowed"); + + subParts.push(parsed); + + // Handle end of string + if(newDoc || str.length - offset <= 0) { + // Handle end if this was a range + if(sawComma === 2) { + this.to = subParts; + } else { // not a range + this.parts.push(subParts); + } + subParts = []; + } + + str = str.slice(offset); + + // Handle Simple Ranges + if(str[0] === ',') { + if(sawComma === 0) { + if(subParts.length) { + this.parts.push(subParts); + } + subParts = []; + } else if(sawComma === 1) { + if(subParts.length) { + this.from = subParts; + } + subParts = []; + } + str = str.slice(1); + sawComma++; + } + } + if(this.from && this.from.length) { + if(this.opts.flattenRange || !this.to || !this.to.length) { + this.parts = this.parts.concat(this.from); + delete this.from; + delete this.to; + } else { + this.isRange = true; + } + } + if(this.opts.stricter) { + this.removeIllegalOpts(); + } + } + + removeIllegalOpts(parts) { + if(!parts) { + if(this.from) { + this.removeIllegalOpts(this.from); + if(!this.to) return; + parts = this.to; + } else { + parts = this.parts; + } + } + + var i, j, part, subpart; + for(i=0; i < parts.length; i++) { + part = parts[i]; + for(j=0; j < part.length - 1; j++) { + subpart = part[j]; + delete subpart.temporal; + delete subpart.spatial; + delete subpart.offset; + delete subpart.textLocationAssertion; + } + } + } + + static generatePart(node, offset, extra) { + + var cfi = ''; + var o; + + // The leading path of CFI corresponding to the 'spine' element must be relative + // to the ancestor 'package' element. If this is a spine child element, we need + // to stop traversing when we reach the 'package' node. + var isSpineElement = node.parentNode.nodeName === 'spine' ? true : false; + + while(node.parentNode) { + o = calcSiblingCount(node.parentNode.childNodes, node, offset); + if(!cfi && o.offset) cfi = ':'+o.offset; + + cfi = '/'+o.count+((node.id) ? '['+cfiEscape(node.id)+']' : '') + cfi; + + node = node.parentNode; + + if(isSpineElement && node.nodeName === 'package'){ + break; + } + } + + return cfi; + } + + static generate(node, offset, extra) { + var cfi; + + if(node instanceof Array) { + var strs = []; + for(let o of node) { + strs.push(this.generatePart(o.node, o.offset)); + } + cfi = strs.join('!'); + } else { + cfi = this.generatePart(node, offset, extra); + } + + if(extra) cfi += extra; + + return 'epubcfi('+cfi+')'; + } + + static toParsed(cfi) { + if(typeof cfi === 'string') cfi = new this(cfi); + if(cfi.isRange) { + return cfi.getFrom(); + } else { + return cfi.get(); + } + } + + + // Takes two CFI paths and compares them + static comparePath(a, b) { + const max = Math.max(a.length, b.length); + + var i, cA, cB, diff; + for(i=0; i < max; i++) { + cA = a[i]; + cB = b[i]; + if(!cA) return -1; + if(!cB) return 1; + + diff = this.compareParts(cA, cB); + if(diff) return diff; + } + return 0; + } + + // Sort an array of CFI objects + static sort(a) { + a.sort((a, b) => { + return this.compare(a, b) + }); + } + + // Takes two CFI objects and compares them. + static compare(a, b) { + var oA = a.get(); + var oB = b.get(); + if(a.isRange || b.isRange) { + if(a.isRange && b.isRange) { + var diff = this.comparePath(oA.from, oB.from); + if(diff) return diff; + return this.comparePath(oA.to, oB.to); + } + if(a.isRange) oA = oA.from; + if(b.isRange) oB = oB.from; + + return this.comparePath(oA, oB); + + } else { // neither a nor b is a range + + return this.comparePath(oA, oB); + } + } + + // Takes two parsed path parts (assuming path is split on '!') and compares them. + static compareParts(a, b) { + const max = Math.max(a.length, b.length); + + var i, cA, cB, diff; + for(i=0; i < max; i++) { + cA = a[i]; + cB = b[i]; + if(!cA) return -1; + if(!cB) return 1; + + diff = cA.nodeIndex - cB.nodeIndex; + if(diff) return diff; + + // The paths must be equal if the "before the first node" syntax is used + // and this must be the last subpart (assuming a valid CFI) + if(cA.nodeIndex === 0) { + return 0; + } + + // Don't bother comparing offsets, temporals or spatials + // unless we're on the last element, since they're not + // supposed to be on elements other than the last + if(i < max - 1) continue; + + // Only compare spatials or temporals for element nodes + if(cA.nodeIndex % 2 === 0) { + + diff = compareTemporal(cA.temporal, cB.temporal); + if(diff) return diff; + + diff = compareSpatial(cA.spatial, cB.spatial); + if(diff) return diff; + + } + + diff = (cA.offset || 0) - (cB.offset || 0); + if(diff) return diff; + } + return 0; + } + + decodeEntities(dom, str) { + try { + const el = dom.createElement('textarea'); + el.innerHTML = str; + return el.valueOf(); + } catch(err) { + // TODO fall back to simpler decode? + // e.g. regex match for stuff like   and   + return str; + } + } + + // decode HTML/XML entities and compute length + trueLength(dom, str) { + let x=this.decodeEntities(dom, str); + return x.length; + } + + getFrom() { + if(!this.isRange) throw new Error("Trying to get beginning of non-range CFI"); + if(!this.from) { + return this.deepClone(this.parts); + } + const parts = this.deepClone(this.parts); + parts[parts.length-1] = parts[parts.length-1].concat(this.from); + return parts; + } + + getTo() { + if(!this.isRange) throw new Error("Trying to get end of non-range CFI"); + const parts = this.deepClone(this.parts); + parts[parts.length-1] = parts[parts.length-1].concat(this.to); + return parts + } + + get() { + if(this.isRange) { + return { + from: this.getFrom(), + to: this.getTo(), + isRange: true + }; + } + return this.deepClone(this.parts); + } + + parseSideBias(o, loc) { + if(!loc) return; + const m = loc.trim().match(/^(.*);s=([ba])$/); + if(!m || m.length < 3) { + if(typeof o.textLocationAssertion === 'object') { + o.textLocationAssertion.post = loc; + } else { + o.textLocationAssertion = loc; + } + return; + } + if(m[1]) { + if(typeof o.textLocationAssertion === 'object') { + o.textLocationAssertion.post = m[1]; + } else { + o.textLocationAssertion = m[1]; + } + } + + if(m[2] === 'a') { + o.sideBias = 'after'; + } else { + o.sideBias = 'before'; + } + } + + parseSpatialRange(range) { + if(!range) return undefined; + const m = range.trim().match(/^([\d\.]+):([\d\.]+)$/); + if(!m || m.length < 3) return undefined; + const o = { + x: parseInt(m[1]), + y: parseInt(m[2]), + }; + if(typeof o.x !== 'number' || typeof o.y !== 'number') { + return undefined; + } + return o; + } + + parse(cfi) { + var o = {}; + const isNumber = new RegExp(/[\d]/); + var f; + var state; + var prevState; + var cur, escape; + var seenColon = false; + var seenSlash = false; + var i; + for(i=0; i <= cfi.length; i++) { + if(i < cfi.length) { + cur = cfi[i]; + } else { + cur = ''; + } + if(cur === '^' && !escape) { + escape = true; + continue; + } + + if(state === '/') { + if(cur.match(isNumber)) { + if(!f) { + f = cur; + } else { + f += cur; + } + escape = false; + continue; + } else { + if(f) { + o.nodeIndex = parseInt(f); + f = null; + } + prevState = state; + state = null; + } + } + + if(state === ':') { + if(cur.match(isNumber)) { + if(!f) { + f = cur; + } else { + f += cur; + } + escape = false; + continue; + } else { + if(f) { + o.offset = parseInt(f); + f = null; + } + prevState = state; + state = null; + } + } + + if(state === '@') { + let done = false; + if(cur.match(isNumber) || cur === '.' || cur === ':') { + if(cur === ':') { + if(!seenColon) { + seenColon = true; + } else { + done = true; + } + } + } else { + done = true; + } + if(!done) { + if(!f) { + f = cur; + } else { + f += cur; + } + escape = false; + continue; + } else { + prevState = state; + state = null; + if(f && seenColon) o.spatial = this.parseSpatialRange(f); + f = null; + } + } + + if(state === '~' ) { + if(cur.match(isNumber) || cur === '.') { + if(!f) { + f = cur; + } else { + f += cur; + } + escape = false; + continue; + } else { + if(f) { + o.temporal = parseFloat(f); + } + prevState = state; + state = null; + f = null; + } + } + + if(!state) { + if(cur === '!') { + i++; + state = cur; + break; + } + + if(cur === ',') { + break; + } + + if(cur === '/') { + if(seenSlash) { + break; + } else { + seenSlash = true; + prevState = state; + state = cur; + escape = false; + continue; + } + } + + if(cur === ':' || cur === '~' || cur === '@') { + if(this.opts.stricter) { + // We've already had a temporal or spatial indicator + // and offset does not make sense and the same time + if(cur === ':' && (typeof o.temporal !== 'undefined' || typeof o.spatial !== 'undefined')) { + break; + } + // We've already had an offset + // and temporal or spatial do not make sense at the same time + if((cur === '~' || cur === '@') && (typeof o.offset !== 'undefined')) { + break; + } + } + prevState = state; + state = cur; + escape = false; + seenColon = false; // only relevant for '@' + continue; + } + + if(cur === '[' && !escape && prevState === ':') { + prevState = state; + state = '['; + escape = false; + continue; + } + + if(cur === '[' && !escape && prevState === '/') { + prevState = state; + state = 'nodeID'; + escape = false; + continue; + } + } + + + if(state === '[') { + if(cur === ']' && !escape) { + prevState = state; + state = null; + this.parseSideBias(o, f); + f = null; + } else if(cur === ',' && !escape) { + o.textLocationAssertion = {}; + if(f) { + o.textLocationAssertion.pre = f; + } + f = null; + } else { + if(!f) { + f = cur; + } else { + f += cur; + } + } + escape = false; + continue; + } + + if(state === 'nodeID') { + if(cur === ']' && !escape) { + prevState = state; + state = null; + o.nodeID = f; + f = null; + } else { + if(!f) { + f = cur; + } else { + f += cur; + } + } + escape = false; + continue; + } + + escape = false; + } + + if(!o.nodeIndex && o.nodeIndex !== 0) throw new Error("Missing child node index in CFI"); + + return {parsed: o, offset: i, newDoc: (state === '!')}; + } + + // The CFI counts child nodes differently from the DOM + // Retrive the child of parentNode at the specified index + // according to the CFI standard way of counting + getChildNodeByCFIIndex(dom, parentNode, index, offset) { + const children = parentNode.childNodes; + if(!children.length) return {node: parentNode, offset: 0}; + + // index is pointing to the virtual node before the first node + // as defined in the CFI spec + if(index <= 0) { + return {node: children[0], relativeToNode: 'before', offset: 0} + } + + var cfiCount = 0; + var lastChild; + var i, child; + for(i=0; i < children.length; i++) { + child = children[i]; + switch(child.nodeType) { + case ELEMENT_NODE: + + // If the previous node was also an element node + // then we have to pretend there was a text node in between + // the current and previous nodes (according to the CFI spec) + // so we increment cfiCount by two + if(cfiCount % 2 === 0) { + cfiCount += 2; + if(cfiCount >= index) { + if(child.tagName.toLowerCase() === 'img' && offset) { + return {node: child, offset} + } + return {node: child, offset: 0} + } + } else { // Previous node was a text node + cfiCount += 1; + if(cfiCount === index) { + if(child.tagName.toLowerCase() === 'img' && offset) { + return {node: child, offset} + } + + return {node: child, offset: 0} + + // This happens when offset into the previous text node was greater + // than the number of characters in that text node + // So we return a position at the end of the previous text node + } else if(cfiCount > index) { + if(!lastChild) { + return {node: parentNode, offset: 0}; + } + return {node: lastChild, offset: this.trueLength(dom, lastChild.textContent)}; + } + } + lastChild = child; + break; + case TEXT_NODE: + case CDATA_SECTION_NODE: + // If this is the first node or the previous node was an element node + if(cfiCount === 0 || cfiCount % 2 === 0) { + cfiCount += 1; + } else { + // If previous node was a text node then they should be combined + // so we count them as one, meaning we don't increment the count + } + + if(cfiCount === index) { + // If offset is greater than the length of the current text node + // then we assume that the next node will also be a text node + // and that we'll be combining them with the current node + let trueLength = this.trueLength(dom, child.textContent); + + if(offset >= trueLength) { + offset -= trueLength; + } else { + return {node: child, offset: offset} + } + } + lastChild = child; + break; + default: + continue + } + } + + // index is pointing to the virtual node after the last child + // as defined in the CFI spec + if(index > cfiCount) { + var o = {relativeToNode: 'after', offset: 0}; + if(!lastChild) { + o.node = parentNode; + } else { + o.node = lastChild; + } + if(this.isTextNode(o.node)) { + o.offset = this.trueLength(dom, o.node.textContent.length); + } + return o; + } + } + + isTextNode(node) { + if(!node) return false; + if(node.nodeType === TEXT_NODE || node.nodeType === CDATA_SECTION_NODE) { + return true; + } + return false; + } + + // Use a Text Location Assertion to correct and offset + correctOffset(dom, node, offset, assertion) { + var curNode = node; + + if(typeof assertion === 'string') { + var matchStr = this.decodeEntities(dom, assertion); + } else { + assertion.pre = this.decodeEntities(dom, assertion.pre); + assertion.post = this.decodeEntities(dom, assertion.post); + var matchStr = assertion.pre + '.' + assertion.post; + } + + if(!(this.isTextNode(node))) { + return {node, offset: 0}; + } + + while(this.isTextNode(curNode.previousSibling)) { + curNode = curNode.previousSibling; + } + + const startNode = curNode; + var str; + const nodeLengths = []; + var txt = ''; + var i = 0; + while(this.isTextNode(curNode)) { + + str = this.decodeEntities(dom, curNode.textContent); + nodeLengths[i] = str.length; + txt += str; + + if(!curNode.nextSibling) break; + curNode = curNode.nextSibling; + i++; + } + + // Find all matches to the Text Location Assertion + const matchOffset = (assertion.pre) ? assertion.pre.length : 0; + const m = matchAll(txt, new RegExp(matchStr), matchOffset); + if(!m.length) return {node, offset}; + + // Get the match that has the closest offset to the existing offset + var newOffset = closest(m, offset); + + if(curNode === node && newOffset === offset) { + return {node, offset}; + } + + i = 0; + curNode = startNode; + while(newOffset >= nodeLengths[i]) { + + newOffset -= nodeLengths[i]; + if(newOffset < 0) return {node, offset} + + if(!curNode.nextSibling || i+1 >= nodeOffsets.length) return {node, offset} + i++; + curNode = curNode.nextSibling; + } + + return {node: curNode, offset: newOffset}; + } + + resolveNode(index, subparts, dom, opts) { + opts = Object.assign({}, opts || {}); + if(!dom) throw new Error("Missing DOM argument"); + + // Traverse backwards until a subpart with a valid ID is found + // or the first subpart is reached + var startNode; + if(index === 0) { + startNode = dom.querySelector('package'); + } + + if(!startNode) { + for(let n of dom.childNodes) { + if(n.nodeType === ELEMENT_NODE) { + startNode = n; + break; + } + } + } + if(!startNode) throw new Error("Document incompatible with CFIs"); + + var node = startNode; + var startFrom = 0; + var i, subpart; + for(i=subparts.length-1; i >=0; i--) { + subpart = subparts[i]; + if(!opts.ignoreIDs && subpart.nodeID && (node = dom.getElementById(subpart.nodeID))) { + startFrom = i + 1; + break; + } + } + + if(!node) { + node = startNode; + } + + var o = {node, offset: 0}; + + var nodeIndex; + for(i=startFrom; i < subparts.length; i++) { + subpart = subparts[i]; + + o = this.getChildNodeByCFIIndex(dom, o.node, subpart.nodeIndex, subpart.offset); + + if(subpart.textLocationAssertion) { + o = this.correctOffset(dom, o.node, subpart.offset, subpart.textLocationAssertion); + } + } + + return o; + } + + // Each part of a CFI (as separated by '!') + // references a separate HTML/XHTML/XML document. + // This function takes an index specifying the part + // of the CFI and the appropriate Document or XMLDocument + // that is referenced by the specified part of the CFI + // and returns the URI for the document referenced by + // the next part of the CFI + // If the opt `ignoreIDs` is true then IDs + // will not be used while resolving + resolveURI(index, dom, opts) { + opts = opts || {}; + if(index < 0 || index > this.parts.length - 2) { + throw new Error("index is out of bounds"); + } + + const subparts = this.parts[index]; + if(!subparts) throw new Error("Missing CFI part for index: " + index); + + var o = this.resolveNode(index, subparts, dom, opts); + var node = o.node; + + const tagName = node.tagName.toLowerCase(); + if(tagName === 'itemref' + && node.parentNode.tagName.toLowerCase() === 'spine') { + + const idref = node.getAttribute('idref'); + if(!idref) throw new Error("Referenced node had not 'idref' attribute"); + node = dom.getElementById(idref); + if(!node) throw new Error("Specified node is missing from manifest"); + const href = node.getAttribute('href'); + if(!href) throw new Error("Manifest item is missing href attribute"); + + return href; + } + + if(tagName === 'iframe' || tagName === 'embed') { + const src = node.getAttribute('src'); + if(!src) throw new Error(tagName + " element is missing 'src' attribute"); + return src; + } + + if(tagName === 'object') { + const data = node.getAttribute('data'); + if(!data) throw new Error(tagName + " element is missing 'data' attribute"); + return data; + } + + if(tagName === 'image'|| tagName === 'use') { + const href = node.getAttribute('xlink:href'); + if(!href) throw new Error(tagName + " element is missing 'xlink:href' attribute"); + return href; + } + + throw new Error("No URI found"); + } + + deepClone(o) { + return JSON.parse(JSON.stringify(o)); + } + + resolveLocation(dom, parts) { + const index = parts.length - 1; + const subparts = parts[index]; + if(!subparts) throw new Error("Missing CFI part for index: " + index); + var o = this.resolveNode(index, subparts, dom); + + var lastpart = this.deepClone(subparts[subparts.length - 1]); + + delete lastpart.nodeIndex; + if(!lastpart.offset) delete o.offset; + + Object.assign(lastpart, o); + + return lastpart; + } + + // Takes the Document or XMLDocument for the final + // document referenced by the CFI + // and returns the node and offset into that node + resolveLast(dom, opts) { + opts = Object.assign({ + range: false + }, opts || {}); + + if(!this.isRange) { + return this.resolveLocation(dom, this.parts); + } + + if(opts.range) { + const range = dom.createRange(); + const from = this.getFrom(); + if(from.relativeToNode === 'before') { + range.setStartBefore(from.node, from.offset) + } else if(from.relativeToNode === 'after') { + range.setStartAfter(from.node, from.offset) + } else { + range.setStart(from.node, from.offset); + } + + const to = this.getTo(); + if(to.relativeToNode === 'before') { + range.setEndBefore(to.node, to.offset) + } else if(to.relativeToNode === 'after') { + range.setEndAfter(to.node, to.offset) + } else { + range.setEnd(to.node, to.offset); + } + + return range; + } + + return { + from: this.resolveLocation(dom, this.getFrom()), + to: this.resolveLocation(dom, this.getTo()), + isRange: true + }; + } + + async fetchAndParse(uri) { + return new Promise((resolv, reject) => { + + const xhr = new XMLHttpRequest; + + xhr.open('GET', uri); + xhr.responseType = 'document'; + + xhr.onload = function() { + if(xhr.readyState === xhr.DONE) { + if(xhr.status < 200 || xhr.status >= 300) { + reject(new Error("Failed to get: " + uri)); + return; + } + resolv(xhr.responseXML); + } + } + xhr.onerror = function() { + reject(new Error("Failed to get: " + uri)); + } + + xhr.send(); + }); + } + + async resolve(uriOrDoc, fetchCB, opts) { + if(typeof fetchCB !== 'function') { + opts = fetchCB; + fetchCB = null + } + if(!fetchCB) { + if(typeof XMLHttpRequest === 'undefined') { + throw new Error("XMLHttpRequest not available. You must supply a function as the second argument."); + } + fetchCB = this.fetchAndParse; + } + + var uri, doc; + if(typeof uriOrDoc === 'string') { + uri = uriOrDoc; + } else { + doc = uriOrDoc; + } + var i, part, uri; + for(i=0; i < this.parts.length - 1; i++) { + if(uri) doc = await fetchCB(uri); + uri = this.resolveURI(i, doc, opts); + } + + if(uri) doc = await fetchCB(uri); + return this.resolveLast(doc, opts); + } + +} + +//module.exports = CFI; + + diff --git a/cps/static/js/libs/pako.min.js b/cps/static/js/libs/pako.min.js new file mode 100644 index 00000000..2535eafc --- /dev/null +++ b/cps/static/js/libs/pako.min.js @@ -0,0 +1,2 @@ +/*! pako 2.1.0 https://github.com/nodeca/pako @license (MIT AND Zlib) */ +!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((t="undefined"!=typeof globalThis?globalThis:t||self).pako={})}(this,(function(t){"use strict";function e(t){let 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a,i,n;for(;;){if(t.lookahead=3&&(t.ins_h=yt(t,t.ins_h,t.window[t.strstart+3-1]),a=t.prev[t.strstart&t.w_mask]=t.head[t.ins_h],t.head[t.ins_h]=t.strstart),t.prev_length=t.match_length,t.prev_match=t.match_start,t.match_length=2,0!==a&&t.prev_length4096)&&(t.match_length=2)),t.prev_length>=3&&t.match_length<=t.prev_length){n=t.strstart+t.lookahead-3,i=X(t,t.strstart-1-t.prev_match,t.prev_length-3),t.lookahead-=t.prev_length-1,t.prev_length-=2;do{++t.strstart<=n&&(t.ins_h=yt(t,t.ins_h,t.window[t.strstart+3-1]),a=t.prev[t.strstart&t.w_mask]=t.head[t.ins_h],t.head[t.ins_h]=t.strstart)}while(0!=--t.prev_length);if(t.match_available=0,t.match_length=2,t.strstart++,i&&(zt(t,!1),0===t.strm.avail_out))return 1}else if(t.match_available){if(i=X(t,0,t.window[t.strstart-1]),i&&zt(t,!1),t.strstart++,t.lookahead--,0===t.strm.avail_out)return 1}else t.match_available=1,t.strstart++,t.lookahead--}return t.match_available&&(i=X(t,0,t.window[t.strstart-1]),t.match_available=0),t.insert=t.strstart<2?t.strstart:2,e===V?(zt(t,!0),0===t.strm.avail_out?3:4):t.sym_next&&(zt(t,!1),0===t.strm.avail_out)?1:2};function Ot(t,e,a,i,n){this.good_length=t,this.max_lazy=e,this.nice_length=a,this.max_chain=i,this.func=n}const It=[new Ot(0,0,0,0,St),new Ot(4,4,8,4,Dt),new Ot(4,5,16,8,Dt),new Ot(4,6,32,32,Dt),new Ot(4,4,16,16,Tt),new Ot(8,16,32,32,Tt),new Ot(8,16,128,128,Tt),new Ot(8,32,128,256,Tt),new Ot(32,128,258,1024,Tt),new Ot(32,258,258,4096,Tt)];function Ft(){this.strm=null,this.status=0,this.pending_buf=null,this.pending_buf_size=0,this.pending_out=0,this.pending=0,this.wrap=0,this.gzhead=null,this.gzindex=0,this.method=ft,this.last_flush=-1,this.w_size=0,this.w_bits=0,this.w_mask=0,this.window=null,this.window_size=0,this.prev=null,this.head=null,this.ins_h=0,this.hash_size=0,this.hash_bits=0,this.hash_mask=0,this.hash_shift=0,this.block_start=0,this.match_length=0,this.prev_match=0,this.match_available=0,this.strstart=0,this.match_start=0,this.lookahead=0,this.prev_length=0,this.max_chain_length=0,this.max_lazy_match=0,this.level=0,this.strategy=0,this.good_match=0,this.nice_match=0,this.dyn_ltree=new Uint16Array(1146),this.dyn_dtree=new Uint16Array(122),this.bl_tree=new Uint16Array(78),kt(this.dyn_ltree),kt(this.dyn_dtree),kt(this.bl_tree),this.l_desc=null,this.d_desc=null,this.bl_desc=null,this.bl_count=new Uint16Array(16),this.heap=new Uint16Array(573),kt(this.heap),this.heap_len=0,this.heap_max=0,this.depth=new 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i=a.last_flush;if(a.last_flush=e,0!==a.pending){if(xt(t),0===t.avail_out)return a.last_flush=-1,tt}else if(0===t.avail_in&&pt(e)<=pt(i)&&e!==V)return gt(t,nt);if(a.status===bt&&0!==t.avail_in)return gt(t,nt);if(a.status===wt&&0===a.wrap&&(a.status=mt),a.status===wt){let e=ft+(a.w_bits-8<<4)<<8,i=-1;if(i=a.strategy>=ot||a.level<2?0:a.level<6?1:6===a.level?2:3,e|=i<<6,0!==a.strstart&&(e|=32),e+=31-e%31,Et(a,e),0!==a.strstart&&(Et(a,t.adler>>>16),Et(a,65535&t.adler)),t.adler=1,a.status=mt,xt(t),0!==a.pending)return 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ba=ha,ga=da,pa=_a,ka=fa,va=ca,ya=ua,xa=wa,za=ma,Aa=K,Ea={Deflate:ba,deflate:ga,deflateRaw:pa,gzip:ka,Inflate:va,inflate:ya,inflateRaw:xa,ungzip:za,constants:Aa};t.Deflate=ba,t.Inflate=va,t.constants=Aa,t.default=Ea,t.deflate=ga,t.deflateRaw=pa,t.gzip=ka,t.inflate=ya,t.inflateRaw=xa,t.ungzip=za,Object.defineProperty(t,"__esModule",{value:!0})})); diff --git a/cps/static/js/reading/epub-progress.js b/cps/static/js/reading/epub-progress.js index 61015fc5..350fc896 100644 --- a/cps/static/js/reading/epub-progress.js +++ b/cps/static/js/reading/epub-progress.js @@ -6,8 +6,7 @@ class EpubParser { this.encoder = new TextEncoder(); } - - getTotalByteLength() { //TODO unrealistic values + getTotalByteLength() { let size = 0; for (let key of Object.keys(this.files)) { let file = this.files[key]; @@ -36,7 +35,6 @@ class EpubParser { return this.parser.parseFromString(this.decompress(path), "text/xml"); } - getSpine() { return Array.from(this.opfXml.getElementsByTagName("spine")[0].children).map(node => node.getAttribute("idref")); } @@ -81,71 +79,32 @@ class EpubParser { } return bytesize; } + getIdRef(filepath){ return this.opfXml.querySelector(`[href="${filepath}"]`).getAttribute("id"); } /** * 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 + * @param {string} cfistr epub-cfi string in the form: epubcfi(/6/16[id13]!/4[id2]/4/2[doc12]/1:0) + * @return object with attributes "node" and "offset" */ - cfiToXmlNode(cfi) { - let cfiPath = cfi.split("(")[1].split(")")[0]; + cfiToXmlNode(cfistr) { + let cfi = new CFI(cfistr); + let cfiPath = cfistr.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++; - } - + return cfi.resolveLast(this.parser.parseFromString(this.decompress(this.resolveIDref(fileId)),"text/xml")); } /** takes the node that the cfi points at and counts the bytes of all nodes before that */ getCurrentFileProgress(CFI) { - let size = parseInt(CFI.split(":")[1])//text offset in node - let startnode = this.cfiToXmlNode(CFI); //returns text node + let parse=this.cfiToXmlNode(CFI); + let size=parse.offset; + let startnode = parse.node//returns text node let xmlnsLength = startnode.parentNode.namespaceURI.length; let prev = startnode.parentNode.previousElementSibling; while (prev !== null) { - // 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; } @@ -153,9 +112,6 @@ class EpubParser { while (parent !== null) { let parentPrev = parent.previousElementSibling; while (parentPrev !== null) { - // console.log(parentPrev.outerHTML) - // console.log(this.encoder.encode(parentPrev.outerHTML).length - xmlnsLength) - size += this.encoder.encode(parentPrev.outerHTML).length - xmlnsLength; parentPrev = parentPrev.previousElementSibling; } @@ -167,7 +123,7 @@ class EpubParser { /** * @param currentFile filepath * @param CFI - * @return {number} percentage + * @return {number} percentage as decimal */ getProgress(currentFile, CFI) { let percentage = (this.getPreviousFilesSize(currentFile) + this.getCurrentFileProgress(CFI))/this.getTotalByteLength(); @@ -181,6 +137,8 @@ class EpubParser { } } } + +//wait until variable is assigned a value function waitFor(variable, callback) { const interval = setInterval(function() { if (variable!==undefined) { @@ -198,14 +156,9 @@ function calculateProgress(){ let data=reader.rendition.currentLocation().end; return Math.round(epubParser.getProgress(data.href,data.cfi)*100); } -var epubParser; -waitFor(reader.book,()=>{ - epubParser = new EpubParser(reader.book.archive.zip.files); -}); -/* -register new event emitter locationchange that fires on urlchange -source: https://stackoverflow.com/a/52809105/21941129 -*/ + +// register new event emitter locationchange that fires on urlchange +// source: https://stackoverflow.com/a/52809105/21941129 (() => { let oldPushState = history.pushState; history.pushState = function pushState() { @@ -225,10 +178,14 @@ source: https://stackoverflow.com/a/52809105/21941129 window.dispatchEvent(new Event('locationchange')); }); })(); + +var epubParser; +waitFor(reader.book,()=>{ + epubParser = new EpubParser(reader.book.archive.zip.files); +}); let progressDiv=document.getElementById("progress"); + window.addEventListener('locationchange',()=>{ let newPos=calculateProgress(); - console.log(newPos); progressDiv.textContent=newPos+"%"; - //getelement set element value }); diff --git a/cps/templates/read.html b/cps/templates/read.html index cf34249e..20e6d3df 100644 --- a/cps/templates/read.html +++ b/cps/templates/read.html @@ -154,5 +154,6 @@ +