remove jquery all together
This commit is contained in:
Aaron Qian
parent
b0f5b0b059
commit
8580a1f463
61 changed files with 4113 additions and 684 deletions
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@ -1,171 +1,165 @@
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import { insertScript } from '../../core';
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import { insertScript } from '../../core'
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const PDFJS_BUNDLE = "https://cdn.jsdelivr.net/npm/pdfjs-dist@3.0.279/build/pdf.min.js";
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const WORKER_BUNDLE = "https://cdn.jsdelivr.net/npm/pdfjs-dist@3.0.279/build/pdf.worker.min.js";
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const PDFJS_BUNDLE = 'https://cdn.jsdelivr.net/npm/pdfjs-dist@3.0.279/build/pdf.min.js'
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const WORKER_BUNDLE = 'https://cdn.jsdelivr.net/npm/pdfjs-dist@3.0.279/build/pdf.worker.min.js'
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class PDFViewer {
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constructor(el) {
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constructor (el) {
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const {
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url,
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hidePaginator,
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hideLoader,
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scale,
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pageNum
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} = el.dataset;
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} = el.dataset
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if(url == null) {
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throw new Error('Cannot load PDF! Attribute `data-url` is not set.');
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if (url == null) {
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throw new Error('Cannot load PDF! Attribute `data-url` is not set.')
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}
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// props
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this.url = url;
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this.hidePaginator = hidePaginator !== 'false';
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this.hideLoader = hideLoader !== 'false';
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this.scale = scale || 3;
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this.url = url
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this.hidePaginator = hidePaginator !== 'false'
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this.hideLoader = hideLoader !== 'false'
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this.scale = scale || 3
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// initial state
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this.pageNum = parseInt(pageNum ,10) || 1;
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this.loaded = false;
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this.pageRendering = false;
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this.pageNumPending = null;
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this.pageNum = parseInt(pageNum, 10) || 1
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this.loaded = false
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this.pageRendering = false
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this.pageNumPending = null
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// DOM elements
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this.$canvas = el.getElementsByClassName('pdf-canvas')[0];
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if(this.$canvas == null) {
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throw new Error('canvas element not found!');
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this.canvas = el.getElementsByClassName('pdf-canvas')[0]
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if (this.canvas == null) {
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throw new Error('canvas element not found!')
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};
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this.$paginator = el.getElementsByClassName("paginator")[0];
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this.$loadingWrapper = el.getElementsByClassName('loading-wrapper')[0];
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this.$next = el.getElementsByClassName('next')[0];
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this.$prev = el.getElementsByClassName('prev')[0];
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this.$pageNum = el.getElementsByClassName('page-num')[0];
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this.$pageCount = el.getElementsByClassName('page-count')[0];
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this.paginator = el.getElementsByClassName('paginator')[0]
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this.loadingWrapper = el.getElementsByClassName('loading-wrapper')[0]
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this.next = el.getElementsByClassName('next')[0]
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this.prev = el.getElementsByClassName('prev')[0]
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this.pageNum = el.getElementsByClassName('page-num')[0]
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this.pageCount = el.getElementsByClassName('page-count')[0]
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// context
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this.ctx = this.$canvas.getContext('2d');
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this.ctx = this.canvas.getContext('2d')
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// events
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this.$next.addEventListener('click', this.handleNextPage.bind(this));
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this.$prev.addEventListener('click', this.handlePrevPage.bind(this));
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this.next.addEventListener('click', this.handleNextPage.bind(this))
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this.prev.addEventListener('click', this.handlePrevPage.bind(this))
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this.showPaginator();
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this.showLoader();
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this.loadPDF();
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this.showPaginator()
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this.showLoader()
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this.loadPDF()
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}
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/**
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* If we haven't disabled the loader, show loader and hide canvas
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*/
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showLoader() {
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if(this.hideLoader) return;
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this.$loadingWrapper.style.display = 'flex';
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this.$canvas.style.display = 'none';
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showLoader () {
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if (this.hideLoader) return
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this.loadingWrapper.style.display = 'flex'
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this.canvas.style.display = 'none'
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}
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/**
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* If we haven't disabled the paginator, show paginator
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*/
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showPaginator() {
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if(this.hidePaginator) return;
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this.$paginator.style.display = 'block';
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showPaginator () {
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if (this.hidePaginator) return
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this.paginator.style.display = 'block'
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}
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/**
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* Hides loader and shows canvas
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*/
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showContent() {
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this.$loadingWrapper.style.display = 'none';
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this.$canvas.style.display = 'block';
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showContent () {
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this.loadingWrapper.style.display = 'none'
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this.canvas.style.display = 'block'
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}
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/**
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* Asynchronously downloads PDF.
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*/
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async loadPDF() {
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this.pdfDoc = await window.pdfjsLib.getDocument(this.url).promise;
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async loadPDF () {
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this.pdfDoc = await window.pdfjsLib.getDocument(this.url).promise
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this.$pageCount.textContent = this.pdfDoc.numPages;
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this.pageCount.textContent = this.pdfDoc.numPages
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// If the user passed in a number that is out of range, render the last page.
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if(this.pageNum > this.pdfDoc.numPages) {
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if (this.pageNum > this.pdfDoc.numPages) {
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this.pageNum = this.pdfDoc.numPages
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}
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this.renderPage(this.pageNum);
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this.renderPage(this.pageNum)
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}
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/**
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* Get page info from document, resize canvas accordingly, and render page.
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* @param num Page number.
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*/
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async renderPage(num) {
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this.pageRendering = true;
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async renderPage (num) {
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this.pageRendering = true
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const page = await this.pdfDoc.getPage(num)
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const viewport = page.getViewport({ scale: this.scale })
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this.canvas.height = viewport.height
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this.canvas.width = viewport.width
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const page = await this.pdfDoc.getPage(num);
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const viewport = page.getViewport({ scale: this.scale });
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this.$canvas.height = viewport.height;
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this.$canvas.width = viewport.width;
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// Wait for rendering to finish
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await page.render({
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canvasContext: this.ctx,
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viewport,
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}).promise;
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viewport
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}).promise
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this.pageRendering = false;
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this.showContent();
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this.pageRendering = false
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this.showContent()
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if (this.pageNumPending !== null) {
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// New page rendering is pending
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this.renderPage(this.pageNumPending);
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this.pageNumPending = null;
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this.renderPage(this.pageNumPending)
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this.pageNumPending = null
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}
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// Update page counters
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this.$pageNum.textContent = num;
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this.pageNum.textContent = num
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}
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/**
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* If another page rendering in progress, waits until the rendering is
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* finished. Otherwise, executes rendering immediately.
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*/
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queueRenderPage(num) {
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queueRenderPage (num) {
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if (this.pageRendering) {
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this.pageNumPending = num;
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this.pageNumPending = num
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} else {
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this.renderPage(num);
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this.renderPage(num)
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}
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}
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/**
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* Displays previous page.
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*/
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handlePrevPage() {
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handlePrevPage () {
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if (this.pageNum <= 1) {
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return;
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return
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}
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this.pageNum--;
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this.queueRenderPage(this.pageNum);
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this.pageNum--
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this.queueRenderPage(this.pageNum)
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}
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/**
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* Displays next page.
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*/
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handleNextPage() {
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handleNextPage () {
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if (this.pageNum >= this.pdfDoc.numPages) {
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return;
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return
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}
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this.pageNum++;
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this.queueRenderPage(this.pageNum);
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this.pageNum++
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this.queueRenderPage(this.pageNum)
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}
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}
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insertScript('pdfjs', PDFJS_BUNDLE, () => {
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window.pdfjsLib.GlobalWorkerOptions.workerSrc = WORKER_BUNDLE;
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Array.from(document.getElementsByClassName('pdf-viewer')).forEach(el => {
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console.log(el);
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new PDFViewer(el);
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});
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});
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window.pdfjsLib.GlobalWorkerOptions.workerSrc = WORKER_BUNDLE
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Array.from(document.getElementsByClassName('pdf-viewer')).forEach(el => new PDFViewer(el))
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})
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