mirror of
https://github.com/john-okeefe/foliate-js.git
synced 2026-09-09 11:29:14 -04:00
Add sample reader
This commit is contained in:
John Factotum
+74
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<!DOCTYPE html>
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<meta charset="utf-8">
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<meta name="color-scheme" content="light dark">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta http-equiv="Content-Security-Policy" content="default-src 'self' blob:; script-src 'self'; style-src 'self' blob: 'unsafe-inline'; img-src 'self' blob: data:; connect-src 'self' blob: data:; frame-src blob: data:; object-src 'none'; form-action 'none';">
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<style>
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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font-family: system-ui, sans-serif;
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}
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#drop-target {
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height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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#nav-bar {
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visibility: hidden;
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position: absolute;
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bottom: 0;
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z-index: 1;
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display: flex;
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align-items: center;
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justify-content: space-between;
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width: 100%;
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height: 48px;
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padding: 6px;
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opacity: .25;
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transition: opacity 250ms ease;
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}
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#nav-bar:hover {
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opacity: 1;
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}
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#nav-bar button {
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padding: 3px;
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border-radius: 6px;
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background: none;
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border: 0;
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}
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#nav-bar button:hover {
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background: rgba(0, 0, 0, .1);
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}
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#progress-label {
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font-size: small;
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font-variant-numeric: tabular-nums;
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}
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.icon {
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display: block;
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fill: none;
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stroke: currentcolor;
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stroke-width: 2px;
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}
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</style>
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<input type="file" id="file-input" hidden>
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<div id="drop-target" class="filter">Drop a file here to open it.</div>
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<div id="nav-bar">
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<button id="left-button" aria-label="Turn left page">
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<svg class="icon" width="24" height="24" aria-hidden="true">
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<path d="M 15 6 L 9 12 L 15 18"/>
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</svg>
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</button>
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<div id="progress-label"></div>
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<button id="right-button" aria-label="Turn right page">
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<svg class="icon" width="24" height="24" aria-hidden="true">
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<path d="M 9 6 L 15 12 L 9 18"/>
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</svg>
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</button>
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</div>
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<script src="vendor/zip-no-worker.min.js"></script>
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<script src="vendor/fflate.min.js"></script>
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<script src="reader.js" type="module"></script>
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/* global zip: false, fflate: false */
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import { View } from './view.js'
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const { ZipReader, BlobReader, TextWriter, BlobWriter } = zip
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zip.configure({ useWebWorkers: false })
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const isZip = async file => {
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const arr = new Uint8Array(await file.slice(0, 4).arrayBuffer())
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return arr[0] === 0x50 && arr[1] === 0x4b && arr[2] === 0x03 && arr[3] === 0x04
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}
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const makeZipLoader = async file => {
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const reader = new ZipReader(new BlobReader(file))
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const entries = await reader.getEntries()
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const map = new Map(entries.map(entry => [entry.filename, entry]))
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const load = f => (name, ...args) =>
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map.has(name) ? f(map.get(name), ...args) : null
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const loadText = load(entry => entry.getData(new TextWriter()))
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const loadBlob = load((entry, type) => entry.getData(new BlobWriter(type)))
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const getSize = name => map.get(name)?.uncompressedSize ?? 0
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return { entries, loadText, loadBlob, getSize }
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}
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const isCBZ = ({ name, type }) =>
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type === 'application/vnd.comicbook+zip' || name.endsWith('.cbz')
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const isFB2 = ({ name, type }) =>
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type === 'application/x-fictionbook+xml' || name.endsWith('.fb2')
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const isFBZ = ({ name, type }) =>
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type === 'application/x-zip-compressed-fb2'
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|| name.endsWith('.fb2.zip') || name.endsWith('.fbz')
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globalThis.open = async (file, emit) => {
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if (!file.size) throw new Error('File not found')
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let book
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if (await isZip(file)) {
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const loader = await makeZipLoader(file)
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if (isCBZ(file)) {
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const { makeComicBook } = await import('./comic-book.js')
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book = makeComicBook(loader, file)
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} else if (isFBZ(file)) {
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const { makeFB2 } = await import('./fb2.js')
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const { entries } = loader
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const entry = entries.find(entry => entry.filename.endsWith('.fb2'))
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const blob = await loader.loadBlob((entry ?? entries[0]).filename)
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book = await makeFB2(blob)
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} else {
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const { EPUB } = await import('./epub.js')
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book = await new EPUB(loader).init()
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}
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} else {
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const { isMOBI, MOBI } = await import('./mobi.js')
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if (await isMOBI(file))
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book = await new MOBI({ unzlib: fflate.unzlibSync }).open(file)
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else if (isFB2(file)) {
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const { makeFB2 } = await import('./fb2.js')
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book = await makeFB2(file)
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}
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}
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if (!book) throw new Error('File type not supported')
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const view = new View(book, emit)
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const element = await view.display()
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document.body.append(element)
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return view
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}
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const getCSS = ({ spacing, justify, hyphenate }) => `
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@namespace epub "http://www.idpf.org/2007/ops";
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html {
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color-scheme: light dark;
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}
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/* https://github.com/whatwg/html/issues/5426 */
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@media (prefers-color-scheme: dark) {
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a:link {
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color: lightblue;
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}
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}
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p, li, blockquote, dd {
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line-height: ${spacing};
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text-align: ${justify ? 'justify' : 'start'};
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-webkit-hyphens: ${hyphenate ? 'auto' : 'manual'};
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-webkit-hyphenate-limit-before: 3;
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-webkit-hyphenate-limit-after: 2;
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-webkit-hyphenate-limit-lines: 2;
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hanging-punctuation: allow-end last;
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widows: 2;
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}
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pre {
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white-space: pre-wrap !important;
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}
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aside[epub|type~="endnote"],
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aside[epub|type~="footnote"],
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aside[epub|type~="note"],
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aside[epub|type~="rearnote"] {
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display: none;
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}
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`
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const $ = document.querySelector.bind(document)
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const locales = 'en'
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const percentFormat = new Intl.NumberFormat(locales, { style: 'percent' })
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const emit = obj => {
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console.debug(obj)
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switch (obj.type) {
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case 'relocated': {
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const { fraction, location, pageItem } = obj
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const percent = percentFormat.format(fraction)
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const loc = pageItem
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? `Page ${pageItem.label}`
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: `Loc ${location.current}`
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$('#progress-label').innerText = `${percent} · ${loc}`
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break
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}
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}
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}
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const dragOverHandler = e => e.preventDefault()
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const dropHandler = e => {
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e.preventDefault()
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const file = Array.from(e.dataTransfer.items)
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.find(item => item.kind === 'file')?.getAsFile()
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if (file) {
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document.body.removeChild($('#drop-target'))
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open(file, emit)
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.then(view => {
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const style = {
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spacing: 1.4,
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justify: true,
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hyphenate: true,
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}
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view.setAppearance({ css: getCSS(style) })
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view.renderer.next()
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$('#nav-bar').style.visibility = 'visible'
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$('#left-button').addEventListener('click', () => view.goLeft())
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$('#right-button').addEventListener('click', () => view.goRight())
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})
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.catch(e => emit(e))
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}
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}
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const dropTarget = $('#drop-target')
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dropTarget.addEventListener('drop', dropHandler)
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dropTarget.addEventListener('dragover', dragOverHandler)
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Vendored
+1
File diff suppressed because one or more lines are too long
Vendored
+1
File diff suppressed because one or more lines are too long
@@ -0,0 +1,267 @@
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import * as CFI from './epubcfi.js'
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import { TOCProgress, SectionProgress } from './progress.js'
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const textWalker = function* (doc, func) {
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const filter = NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT
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| NodeFilter.SHOW_CDATA_SECTION
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const { FILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP } = NodeFilter
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const acceptNode = node => {
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const name = node.localName?.toLowerCase()
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if (name === 'script' || name === 'style') return FILTER_REJECT
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if (node.nodeType === 1) return FILTER_SKIP
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return FILTER_ACCEPT
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}
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const walker = doc.createTreeWalker(doc.body, filter, { acceptNode })
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const nodes = []
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for (let node = walker.nextNode(); node; node = walker.nextNode())
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nodes.push(node)
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const strs = nodes.map(node => node.nodeValue)
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const makeRange = (startIndex, startOffset, endIndex, endOffset) => {
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const range = doc.createRange()
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range.setStart(nodes[startIndex], startOffset)
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range.setEnd(nodes[endIndex], endOffset)
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return range
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}
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for (const match of func(strs, makeRange)) yield match
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}
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const frameRect = (frame, rect) => {
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const left = rect.left + frame.left
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const right = rect.right + frame.left
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const top = rect.top + frame.top
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const bottom = rect.bottom + frame.top
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return { left, right, top, bottom }
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}
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const pointIsInView = ({ x, y }) =>
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x > 0 && y > 0 && x < window.innerWidth && y < window.innerHeight
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export const getPosition = target => {
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// TODO: vertical text
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const frameElement = (target.getRootNode?.() ?? target?.endContainer?.getRootNode?.())
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?.defaultView?.frameElement
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const frame = frameElement?.getBoundingClientRect() ?? { top: 0, left: 0 }
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const rects = Array.from(target.getClientRects())
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const first = frameRect(frame, rects[0])
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const last = frameRect(frame, rects.at(-1))
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const start = {
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point: { x: (first.left + first.right) / 2, y: first.top },
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dir: 'up',
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}
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const end = {
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point: { x: (last.left + last.right) / 2, y: last.bottom },
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dir: 'down',
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}
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const startInView = pointIsInView(start.point)
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const endInView = pointIsInView(end.point)
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if (!startInView && !endInView) return { point: { x: 0, y: 0 } }
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if (!startInView) return end
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if (!endInView) return start
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return start.point.y > window.innerHeight - end.point.y ? start : end
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}
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// https://www.w3.org/TR/epub-ssv-11/
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const SSV = Object.fromEntries(Array.from(Object.entries({
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isRef: ['annoref', 'biblioref', 'glossref', 'noteref'],
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isLink: ['backlink'],
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isNote: ['annotation', 'note', 'footnote', 'endnote', 'rearnote'],
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}), ([k, v]) => [k, el =>
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el.getAttributeNS('http://www.idpf.org/2007/ops', 'type')
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?.split(/s/)?.some(t => v.includes(t))]))
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export class View {
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#sectionProgress
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#tocProgress
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#pageProgress
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language = 'en'
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textDirection = ''
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isCJK = false
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isFixedLayout = false
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#css
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constructor(book, emit) {
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this.book = book
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this.emit = emit
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if (book.metadata?.language) try {
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const language = book.metadata.language
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book.metadata.language = Intl.getCanonicalLocales(language)[0]
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const tag = typeof language === 'string' ? language : language[0]
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const locale = new Intl.Locale(tag)
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this.isCJK = ['zh', 'ja', 'kr'].includes(locale.language)
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this.textDirection = locale.textInfo.direction
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} catch(e) {
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console.warn(e)
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|
}
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||||||
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if (book.splitTOCHref && book.getTOCFragment) {
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const ids = book.sections.map(s => s.id)
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this.#sectionProgress = new SectionProgress(book.sections, 150, 1600)
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const splitHref = book.splitTOCHref.bind(book)
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const getFragment = book.getTOCFragment.bind(book)
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this.#tocProgress = new TOCProgress({
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toc: book.toc ?? [], ids, splitHref, getFragment })
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this.#pageProgress = new TOCProgress({
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toc: book.pageList ?? [], ids, splitHref, getFragment })
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}
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|
}
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async display() {
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const opts = {
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book: this.book,
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onLoad: this.#onLoad.bind(this),
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onRelocated: this.#onRelocated.bind(this),
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}
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this.isFixedLayout = this.book.rendition?.layout === 'pre-paginated'
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if (this.isFixedLayout) {
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const { FixedLayout } = await import('./fixed-layout.js')
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||||||
|
this.renderer = new FixedLayout(opts)
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||||||
|
} else {
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||||||
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const { Paginator } = await import('./paginator.js')
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|
this.renderer = new Paginator(opts)
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||||||
|
}
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|
return this.renderer.element
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||||||
|
}
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||||||
|
#onRelocated(range, index, fraction) {
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|
if (!this.#sectionProgress) return
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const progress = this.#sectionProgress.getProgress(index, fraction)
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const tocItem = this.#tocProgress.getProgress(index, range)
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const pageItem = this.#pageProgress.getProgress(index, range)
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const cfi = this.getCFI(index, range)
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this.emit?.({ type: 'relocated', ...progress, tocItem, pageItem, cfi })
|
||||||
|
}
|
||||||
|
#onLoad(doc, index) {
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||||||
|
const { book } = this
|
||||||
|
|
||||||
|
// set language and dir if not already set
|
||||||
|
doc.documentElement.lang ||= this.language
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||||||
|
doc.documentElement.dir ||= this.isCJK ? '' : this.textDirection
|
||||||
|
|
||||||
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this.renderer.setStyle(this.#css)
|
||||||
|
|
||||||
|
// set `document` background to `doc` background
|
||||||
|
// this is needed cause the iframe does not fill the whole viewport
|
||||||
|
const bodyStyle = doc.defaultView.getComputedStyle(doc.body)
|
||||||
|
document.body.style.background =
|
||||||
|
bodyStyle.backgroundColor === 'rgba(0, 0, 0, 0)'
|
||||||
|
&& bodyStyle.backgroundImage === 'none'
|
||||||
|
? doc.defaultView.getComputedStyle(doc.documentElement).background
|
||||||
|
: bodyStyle.background
|
||||||
|
|
||||||
|
// set handlers for links
|
||||||
|
const section = book.sections[index]
|
||||||
|
for (const a of doc.querySelectorAll('a[href]'))
|
||||||
|
a.addEventListener('click', e => {
|
||||||
|
e.preventDefault()
|
||||||
|
const href = a.getAttribute('href')
|
||||||
|
const uri = section?.resolveHref?.(href) ?? href
|
||||||
|
if (book?.isExternal?.(uri))
|
||||||
|
this.emit?.({ type: 'external-link', uri })
|
||||||
|
else if (SSV.isRef(a)) {
|
||||||
|
const { index, anchor } = book.resolveHref(uri)
|
||||||
|
const pos = getPosition(a)
|
||||||
|
Promise.resolve(book.sections[index].createDocument())
|
||||||
|
.then(doc => [anchor(doc), doc.contentType])
|
||||||
|
.then(([el, type]) =>
|
||||||
|
[el?.innerHTML, type, SSV.isNote(el)])
|
||||||
|
.then(([content, contentType, isNote]) => content
|
||||||
|
? this.emit?.({
|
||||||
|
type: 'reference',
|
||||||
|
href: isNote ? null : uri,
|
||||||
|
content, contentType, pos,
|
||||||
|
}) : null)
|
||||||
|
.catch(e => console.error(e))
|
||||||
|
return
|
||||||
|
} else this.goTo(uri)
|
||||||
|
})
|
||||||
|
}
|
||||||
|
getCFI(index, range) {
|
||||||
|
if (!range) return ''
|
||||||
|
const baseCFI = this.book.sections[index].cfi ?? CFI.fake.fromIndex(index)
|
||||||
|
return CFI.joinIndir(baseCFI, CFI.fromRange(range))
|
||||||
|
}
|
||||||
|
resolveCFI(cfi) {
|
||||||
|
if (this.book.resolveCFI)
|
||||||
|
return this.book.resolveCFI(cfi)
|
||||||
|
else {
|
||||||
|
const parts = CFI.parse(cfi)
|
||||||
|
const index = CFI.fake.toIndex((parts.parent ?? parts).shift())
|
||||||
|
const anchor = doc => CFI.toRange(doc, parts)
|
||||||
|
return { index, anchor }
|
||||||
|
}
|
||||||
|
}
|
||||||
|
resolveNavigation(target) {
|
||||||
|
try {
|
||||||
|
if (typeof target === 'number') return { index: target }
|
||||||
|
if (CFI.isCFI.test(target)) return this.resolveCFI(target)
|
||||||
|
return this.book.resolveHref(target)
|
||||||
|
} catch (e) {
|
||||||
|
console.error(e)
|
||||||
|
console.error(`Could not resolve target ${target}`)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
async goTo(target) {
|
||||||
|
const resolved = this.resolveNavigation(target)
|
||||||
|
try {
|
||||||
|
await this.renderer.goTo(resolved)
|
||||||
|
return resolved
|
||||||
|
} catch(e) {
|
||||||
|
console.error(e)
|
||||||
|
console.error(`Could not go to ${target}`)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
async goToFraction(frac) {
|
||||||
|
const [index, anchor] = this.#sectionProgress.getSection(frac)
|
||||||
|
return this.renderer.goTo({ index, anchor })
|
||||||
|
}
|
||||||
|
async select(target) {
|
||||||
|
try {
|
||||||
|
const obj = await this.resolveNavigation(target)
|
||||||
|
await this.renderer.goTo({ ...obj, select: true })
|
||||||
|
} catch(e) {
|
||||||
|
console.error(e)
|
||||||
|
console.error(`Could not go to ${target}`)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
goLeft() {
|
||||||
|
return this.book.dir === 'rtl' ? this.renderer.next() : this.renderer.prev()
|
||||||
|
}
|
||||||
|
goRight() {
|
||||||
|
return this.book.dir === 'rtl' ? this.renderer.prev() : this.renderer.next()
|
||||||
|
}
|
||||||
|
setAppearance({ layout, css }) {
|
||||||
|
if (this.isFixedLayout) return
|
||||||
|
Object.assign(this.renderer.layout, layout)
|
||||||
|
this.#css = css
|
||||||
|
this.renderer.setStyle(css)
|
||||||
|
this.renderer.render()
|
||||||
|
}
|
||||||
|
async * #searchSection(matcher, query, index) {
|
||||||
|
const doc = await this.book.sections[index].createDocument()
|
||||||
|
for (const { range, excerpt } of matcher(doc, query))
|
||||||
|
yield { cfi: this.getCFI(index, range), excerpt }
|
||||||
|
}
|
||||||
|
async * #searchBook(matcher, query) {
|
||||||
|
const { sections } = this.book
|
||||||
|
for (const [index, { createDocument }] of sections.entries()) {
|
||||||
|
if (!createDocument) continue
|
||||||
|
const doc = await createDocument()
|
||||||
|
const subitems = Array.from(matcher(doc, query), ({ range, excerpt }) =>
|
||||||
|
({ cfi: this.getCFI(index, range), excerpt }))
|
||||||
|
const progress = (index + 1) / sections.length
|
||||||
|
yield { progress }
|
||||||
|
if (subitems.length) yield { index, subitems }
|
||||||
|
}
|
||||||
|
}
|
||||||
|
async * search(opts) {
|
||||||
|
const { searchMatcher } = await import('./search.js')
|
||||||
|
const { query, index } = opts
|
||||||
|
const matcher = searchMatcher(textWalker,
|
||||||
|
{ defaultLocale: this.language, ...opts })
|
||||||
|
const iter = index != null
|
||||||
|
? this.#searchSection(matcher, query, index)
|
||||||
|
: this.#searchBook(matcher, query)
|
||||||
|
for await (const result of iter) yield 'subitems' in result ? {
|
||||||
|
label: this.#tocProgress.getProgress(result.index)?.label ?? '',
|
||||||
|
subitems: result.subitems,
|
||||||
|
} : result
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user