mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
456 lines
15 KiB
Vue
456 lines
15 KiB
Vue
<template>
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<div id="epub-reader" class="h-full w-full">
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<div class="h-full flex items-center justify-center">
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<button type="button" aria-label="Previous page" class="w-24 max-w-24 h-full hidden sm:flex items-center overflow-x-hidden justify-center opacity-50 hover:opacity-100">
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<span v-if="hasPrev" class="material-icons text-6xl" @mousedown.prevent @click="prev">chevron_left</span>
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</button>
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<div id="frame" class="w-full" style="height: 80%">
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<div id="viewer"></div>
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</div>
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<button type="button" aria-label="Next page" class="w-24 max-w-24 h-full hidden sm:flex items-center justify-center overflow-x-hidden opacity-50 hover:opacity-100">
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<span v-if="hasNext" class="material-icons text-6xl" @mousedown.prevent @click="next">chevron_right</span>
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</button>
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</div>
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</div>
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</template>
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<script>
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import ePub from 'epubjs'
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/**
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* @typedef {object} EpubReader
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* @property {ePub.Book} book
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* @property {ePub.Rendition} rendition
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*/
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export default {
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props: {
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libraryItem: {
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type: Object,
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default: () => {}
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},
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playerOpen: Boolean,
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keepProgress: Boolean,
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fileId: String
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},
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data() {
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return {
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windowWidth: 0,
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windowHeight: 0,
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/** @type {ePub.Book} */
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book: null,
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/** @type {ePub.Rendition} */
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rendition: null,
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chapters: [],
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ereaderSettings: {
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theme: 'dark',
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font: 'serif',
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fontScale: 100,
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lineSpacing: 115,
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spread: 'auto',
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textStroke: 0
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}
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}
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},
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watch: {
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playerOpen() {
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this.resize()
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}
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},
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computed: {
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userToken() {
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return this.$store.getters['user/getToken']
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},
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/** @returns {string} */
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libraryItemId() {
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return this.libraryItem?.id
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},
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allowScriptedContent() {
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return this.$store.getters['libraries/getLibraryEpubsAllowScriptedContent']
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},
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hasPrev() {
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return !this.rendition?.location?.atStart
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},
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hasNext() {
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return !this.rendition?.location?.atEnd
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},
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userMediaProgress() {
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if (!this.libraryItemId) return
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return this.$store.getters['user/getUserMediaProgress'](this.libraryItemId)
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},
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savedEbookLocation() {
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if (!this.keepProgress) return null
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if (!this.userMediaProgress?.ebookLocation) return null
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// Validate ebookLocation is an epubcfi
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if (!String(this.userMediaProgress.ebookLocation).startsWith('epubcfi')) return null
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return this.userMediaProgress.ebookLocation
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},
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localStorageLocationsKey() {
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return `ebookLocations-${this.libraryItemId}`
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},
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readerWidth() {
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if (this.windowWidth < 640) return this.windowWidth
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return this.windowWidth - 200
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},
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readerHeight() {
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if (this.windowHeight < 400 || !this.playerOpen) return this.windowHeight
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return this.windowHeight - 164
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},
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ebookUrl() {
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if (this.fileId) {
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return `/api/items/${this.libraryItemId}/ebook/${this.fileId}`
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}
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return `/api/items/${this.libraryItemId}/ebook`
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},
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themeRules() {
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const isDark = this.ereaderSettings.theme === 'dark'
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const fontColor = isDark ? '#fff' : '#000'
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const backgroundColor = isDark ? 'rgb(35 35 35)' : 'rgb(255, 255, 255)'
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const lineSpacing = this.ereaderSettings.lineSpacing / 100
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const fontScale = this.ereaderSettings.fontScale / 100
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const textStroke = this.ereaderSettings.textStroke / 100
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return {
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'*': {
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color: `${fontColor}!important`,
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'background-color': `${backgroundColor}!important`,
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'line-height': lineSpacing * fontScale + 'rem!important',
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'-webkit-text-stroke': textStroke + 'px ' + fontColor + '!important'
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},
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a: {
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color: `${fontColor}!important`
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}
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}
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}
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},
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methods: {
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updateSettings(settings) {
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this.ereaderSettings = settings
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if (!this.rendition) return
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this.applyTheme()
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const fontScale = settings.fontScale || 100
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this.rendition.themes.fontSize(`${fontScale}%`)
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this.rendition.themes.font(settings.font)
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this.rendition.spread(settings.spread || 'auto')
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},
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prev() {
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if (!this.rendition?.manager) return
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return this.rendition?.prev()
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},
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next() {
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if (!this.rendition?.manager) return
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return this.rendition?.next()
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},
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goToChapter(href) {
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if (!this.rendition?.manager) return
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return this.rendition?.display(href)
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},
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/** @returns {object} Returns the chapter that the `position` in the book is in */
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findChapterFromPosition(chapters, position) {
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let foundChapter
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for (let i = 0; i < chapters.length; i++) {
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if (position >= chapters[i].start && (!chapters[i + 1] || position < chapters[i + 1].start)) {
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foundChapter = chapters[i]
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if (chapters[i].subitems && chapters[i].subitems.length > 0) {
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return this.findChapterFromPosition(chapters[i].subitems, position, foundChapter)
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}
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break
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}
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}
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return foundChapter
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},
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/** @returns {Array} Returns an array of chapters that only includes chapters with query results */
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async searchBook(query) {
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const chapters = structuredClone(await this.chapters)
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const searchResults = await Promise.all(this.book.spine.spineItems.map((item) => item.load(this.book.load.bind(this.book)).then(item.find.bind(item, query)).finally(item.unload.bind(item))))
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const mergedResults = [].concat(...searchResults)
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mergedResults.forEach((chapter) => {
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chapter.start = this.book.locations.percentageFromCfi(chapter.cfi)
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const foundChapter = this.findChapterFromPosition(chapters, chapter.start)
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if (foundChapter) foundChapter.searchResults.push(chapter)
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})
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let filteredResults = chapters.filter(function f(o) {
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if (o.searchResults.length) return true
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if (o.subitems.length) {
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return (o.subitems = o.subitems.filter(f)).length
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}
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})
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return filteredResults
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},
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keyUp(e) {
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const rtl = this.book.package.metadata.direction === 'rtl'
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if ((e.keyCode || e.which) == 37) {
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return rtl ? this.next() : this.prev()
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} else if ((e.keyCode || e.which) == 39) {
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return rtl ? this.prev() : this.next()
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}
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},
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/**
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* @param {object} payload
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* @param {string} payload.ebookLocation - CFI of the current location
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* @param {string} payload.ebookProgress - eBook Progress Percentage
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*/
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updateProgress(payload) {
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if (!this.keepProgress) return
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this.$axios.$patch(`/api/me/progress/${this.libraryItemId}`, payload, { progress: false }).catch((error) => {
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console.error('EpubReader.updateProgress failed:', error)
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})
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},
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getAllEbookLocationData() {
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const locations = []
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let totalSize = 0 // Total in bytes
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for (const key in localStorage) {
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if (!localStorage.hasOwnProperty(key) || !key.startsWith('ebookLocations-')) {
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continue
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}
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try {
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const ebookLocations = JSON.parse(localStorage[key])
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if (!ebookLocations.locations) throw new Error('Invalid locations object')
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ebookLocations.key = key
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ebookLocations.size = (localStorage[key].length + key.length) * 2
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locations.push(ebookLocations)
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totalSize += ebookLocations.size
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} catch (error) {
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console.error('Failed to parse ebook locations', key, error)
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localStorage.removeItem(key)
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}
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}
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// Sort by oldest lastAccessed first
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locations.sort((a, b) => a.lastAccessed - b.lastAccessed)
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return {
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locations,
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totalSize
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}
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},
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/** @param {string} locationString */
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checkSaveLocations(locationString) {
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const maxSizeInBytes = 3000000 // Allow epub locations to take up to 3MB of space
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const newLocationsSize = JSON.stringify({ lastAccessed: Date.now(), locations: locationString }).length * 2
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// Too large overall
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if (newLocationsSize > maxSizeInBytes) {
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console.error('Epub locations are too large to store. Size =', newLocationsSize)
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return
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}
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const ebookLocationsData = this.getAllEbookLocationData()
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let availableSpace = maxSizeInBytes - ebookLocationsData.totalSize
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// Remove epub locations until there is room for locations
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while (availableSpace < newLocationsSize && ebookLocationsData.locations.length) {
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const oldestLocation = ebookLocationsData.locations.shift()
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console.log(`Removing cached locations for epub "${oldestLocation.key}" taking up ${oldestLocation.size} bytes`)
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availableSpace += oldestLocation.size
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localStorage.removeItem(oldestLocation.key)
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}
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console.log(`Cacheing epub locations with key "${this.localStorageLocationsKey}" taking up ${newLocationsSize} bytes`)
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this.saveLocations(locationString)
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},
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/** @param {string} locationString */
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saveLocations(locationString) {
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localStorage.setItem(
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this.localStorageLocationsKey,
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JSON.stringify({
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lastAccessed: Date.now(),
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locations: locationString
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})
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)
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},
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loadLocations() {
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const locationsObjString = localStorage.getItem(this.localStorageLocationsKey)
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if (!locationsObjString) return null
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const locationsObject = JSON.parse(locationsObjString)
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// Remove invalid location objects
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if (!locationsObject.locations) {
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console.error('Invalid epub locations stored', this.localStorageLocationsKey)
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localStorage.removeItem(this.localStorageLocationsKey)
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return null
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}
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// Update lastAccessed
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this.saveLocations(locationsObject.locations)
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return locationsObject.locations
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},
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/** @param {string} location - CFI of the new location */
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relocated(location) {
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if (this.savedEbookLocation === location.start.cfi) {
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return
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}
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if (location.end.percentage) {
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this.updateProgress({
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ebookLocation: location.start.cfi,
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ebookProgress: location.end.percentage
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})
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} else {
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this.updateProgress({
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ebookLocation: location.start.cfi
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})
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}
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},
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initEpub() {
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/** @type {EpubReader} */
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const reader = this
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/** @type {ePub.Book} */
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reader.book = new ePub(reader.ebookUrl, {
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width: this.readerWidth,
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height: this.readerHeight - 50,
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openAs: 'epub',
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requestHeaders: {
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Authorization: `Bearer ${this.userToken}`
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}
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})
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/** @type {ePub.Rendition} */
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reader.rendition = reader.book.renderTo('viewer', {
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width: this.readerWidth,
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height: this.readerHeight * 0.8,
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allowScriptedContent: this.allowScriptedContent,
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spread: 'auto',
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snap: true,
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manager: 'continuous',
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flow: 'paginated'
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})
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// load saved progress
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reader.rendition.display(this.savedEbookLocation || reader.book.locations.start)
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reader.rendition.on('rendered', () => {
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this.applyTheme()
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})
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reader.book.ready.then(() => {
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// set up event listeners
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reader.rendition.on('relocated', reader.relocated)
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reader.rendition.on('keydown', reader.keyUp)
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reader.rendition.on('touchstart', (event) => {
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this.$emit('touchstart', event)
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})
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reader.rendition.on('touchend', (event) => {
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this.$emit('touchend', event)
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})
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// load ebook cfi locations
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const savedLocations = this.loadLocations()
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if (savedLocations) {
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reader.book.locations.load(savedLocations)
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} else {
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reader.book.locations.generate().then(() => {
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this.checkSaveLocations(reader.book.locations.save())
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})
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}
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this.getChapters()
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})
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},
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getChapters() {
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// Load the list of chapters in the book. See https://github.com/futurepress/epub.js/issues/759
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const toc = this.book?.navigation?.toc || []
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const tocTree = []
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const resolveURL = (url, relativeTo) => {
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// see https://github.com/futurepress/epub.js/issues/1084
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// HACK-ish: abuse the URL API a little to resolve the path
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// the base needs to be a valid URL, or it will throw a TypeError,
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// so we just set a random base URI and remove it later
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const base = 'https://example.invalid/'
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return new URL(url, base + relativeTo).href.replace(base, '')
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}
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const basePath = this.book.packaging.navPath || this.book.packaging.ncxPath
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const createTree = async (toc, parent) => {
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const promises = toc.map(async (tocItem, i) => {
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const href = resolveURL(tocItem.href, basePath)
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const id = href.split('#')[1]
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const item = this.book.spine.get(href)
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await item.load(this.book.load.bind(this.book))
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const el = id ? item.document.getElementById(id) : item.document.body
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const cfi = item.cfiFromElement(el)
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parent[i] = {
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title: tocItem.label.trim(),
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subitems: [],
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href,
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cfi,
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start: this.book.locations.percentageFromCfi(cfi),
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end: null, // set by flattenChapters()
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id: null, // set by flattenChapters()
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searchResults: []
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}
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if (tocItem.subitems) {
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await createTree(tocItem.subitems, parent[i].subitems)
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}
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})
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await Promise.all(promises)
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}
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return createTree(toc, tocTree).then(() => {
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this.chapters = tocTree
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})
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},
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flattenChapters(chapters) {
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// Convert the nested epub chapters into something that looks like audiobook chapters for player-ui
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const unwrap = (chapters) => {
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return chapters.reduce((acc, chapter) => {
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return chapter.subitems ? [...acc, chapter, ...unwrap(chapter.subitems)] : [...acc, chapter]
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}, [])
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}
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let flattenedChapters = unwrap(chapters)
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flattenedChapters = flattenedChapters.sort((a, b) => a.start - b.start)
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for (let i = 0; i < flattenedChapters.length; i++) {
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flattenedChapters[i].id = i
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if (i < flattenedChapters.length - 1) {
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flattenedChapters[i].end = flattenedChapters[i + 1].start
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} else {
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flattenedChapters[i].end = 1
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}
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}
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return flattenedChapters
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},
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resize() {
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this.windowWidth = window.innerWidth
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this.windowHeight = window.innerHeight
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this.rendition?.resize(this.readerWidth, this.readerHeight * 0.8)
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},
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applyTheme() {
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if (!this.rendition) return
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this.rendition.getContents().forEach((c) => {
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c.addStylesheetRules(this.themeRules)
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})
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}
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},
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mounted() {
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this.windowWidth = window.innerWidth
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this.windowHeight = window.innerHeight
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window.addEventListener('resize', this.resize)
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this.initEpub()
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},
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beforeDestroy() {
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window.removeEventListener('resize', this.resize)
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this.book?.destroy()
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}
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}
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</script>
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