mirror of
https://github.com/Alexander-D-Karpov/akarpov
synced 2024-11-11 02:26:36 +03:00
fixed pdf
This commit is contained in:
parent
08cfbc211e
commit
5f2c738373
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@ -3,167 +3,82 @@
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def view(file: File):
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static = """
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<link href="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.4.120/web/pdf_viewer.min.css" rel="stylesheet">
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<style>
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#pdf-viewer {
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width: 100%;
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height: 100%;
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background: rgba(0, 0, 0, 0.1);
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overflow: auto;
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}
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.pdf-page-canvas {
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display: block;
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margin: 5px auto;
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border: 1px solid rgba(0, 0, 0, 0.2);
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}
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</style>
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"""
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content = (
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"""
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<header>
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<div class="col-auto">
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<ul class="navigation">
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<li class="navigation__item">
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<!-- Navigate to the Previous and Next pages -->
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<a href="#" class="previous round" id="prev_page">
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<i class="fas fa-arrow-left"></i>
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</a>
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<!-- Navigate to a specific page -->
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<input type="number" value="1" id="current_page" />
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<a href="#" class="next round" id="next_page">
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<i class="fas fa-arrow-right"></i>
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</a>
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<!-- Page Info -->
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Page
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<span id="page_num"></span>
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of
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<span id="page_count"></span>
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</li>
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<!-- Zoom In and Out -->
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<li class="navigation__item">
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<button class="zoom" id="zoom_in">
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<i class="fas fa-search-plus"></i>
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</button>
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<button class="zoom" id="zoom_out">
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<i class="fas fa-search-minus"></i>
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</button>
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</li>
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</ul>
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</header>
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<!-- Canvas to place the PDF -->
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<canvas id="canvas" class="canvas__container w-50"></canvas>
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<div id="pdf" class="col-auto">
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</div>
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<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.4.120/build/pdf.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.5.141/pdf.min.js"></script>
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<script>
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"""
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+ f"""
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const pdf = '{file.file.url}';
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const url = '{file.file.url}';
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"""
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+ """
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const pageNum = document.querySelector('#page_num');
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const pageCount = document.querySelector('#page_count');
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const currentPage = document.querySelector('#current_page');
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const previousPage = document.querySelector('#prev_page');
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const nextPage = document.querySelector('#next_page');
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const zoomIn = document.querySelector('#zoom_in');
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const zoomOut = document.querySelector('#zoom_out');
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var currPage = 1;
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var numPages = 0;
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var thePDF = null;
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pdfjsLib.GlobalWorkerOptions.workerSrc =
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'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.5.141/pdf.worker.min.js';
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const loadingTask = pdfjsLib.getDocument(url);
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(async () => {
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const pdf = await loadingTask.promise;
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thePDF = pdf;
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numPages = pdf.numPages;
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await handlePages(1);
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const initialState = {
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pdfDoc: null,
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currentPage: 1,
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pageCount: 0,
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zoom: 1,
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async function handlePages(curr) {
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const scale = 1.5;
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const page = await pdf.getPage(curr);
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const viewport = page.getViewport({ scale });
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// Support HiDPI-screens.
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const outputScale = window.devicePixelRatio || 1;
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var canvas = document.createElement("canvas");
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const context = canvas.getContext("2d");
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canvas.width = Math.floor(viewport.width * outputScale);
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canvas.height = Math.floor(viewport.height * outputScale);
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canvas.style.width = Math.floor(viewport.width) + "px";
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canvas.style.height = Math.floor(viewport.height) + "px";
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const transform = outputScale !== 1
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? [outputScale, 0, 0, outputScale, 0, 0]
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: null;
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const renderContext = {
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canvasContext: context,
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transform,
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viewport,
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};
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pdfjsLib
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.getDocument(pdf)
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.promise.then((data) => {
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initialState.pdfDoc = data;
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console.log('pdfDocument', initialState.pdfDoc);
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page.render(renderContext);
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document.getElementById("pdf").appendChild(canvas);
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pageCount.textContent = initialState.pdfDoc.numPages;
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renderPage();
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})
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.catch((err) => {
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alert(err.message);
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});
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const renderPage = () => {
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// Load the first page.
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console.log(initialState.pdfDoc, 'pdfDoc');
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initialState.pdfDoc
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.getPage(initialState.currentPage)
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.then((page) => {
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console.log('page', page);
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const canvas = document.querySelector('#canvas');
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const ctx = canvas.getContext('2d');
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const viewport = page.getViewport({
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scale: initialState.zoom,
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});
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canvas.height = viewport.height;
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canvas.width = viewport.width;
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// Render the PDF page into the canvas context.
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const renderCtx = {
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canvasContext: ctx,
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viewport: viewport,
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};
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page.render(renderCtx);
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pageNum.textContent = initialState.currentPage;
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});
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};
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const showPrevPage = () => {
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if (initialState.pdfDoc === null || initialState.currentPage <= 1)
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return;
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initialState.currentPage--;
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// Render the current page.
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currentPage.value = initialState.currentPage;
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renderPage();
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};
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const showNextPage = () => {
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if (
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initialState.pdfDoc === null ||
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initialState.currentPage >= initialState.pdfDoc._pdfInfo.numPages
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)
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return;
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initialState.currentPage++;
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currentPage.value = initialState.currentPage;
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renderPage();
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};
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// Button events.
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previousPage.addEventListener('click', showPrevPage);
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nextPage.addEventListener('click', showNextPage);
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currentPage.addEventListener('keypress', (event) => {
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if (initialState.pdfDoc === null) return;
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// Get the key code.
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const keycode = event.keyCode ? event.keyCode : event.which;
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if (keycode === 13) {
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// Get the new page number and render it.
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let desiredPage = currentPage.valueAsNumber;
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initialState.currentPage = Math.min(
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Math.max(desiredPage, 1),
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initialState.pdfDoc._pdfInfo.numPages,
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);
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currentPage.value = initialState.currentPage;
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renderPage();
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curr++;
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if (thePDF !== null && curr <= numPages) {
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await handlePages(curr+1);
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}
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});
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zoomIn.addEventListener('click', () => {
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if (initialState.pdfDoc === null) return;
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initialState.zoom *= 4 / 3;
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renderPage();
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});
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}
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})();
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</script>
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zoomOut.addEventListener('click', () => {
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if (initialState.pdfDoc === null) return;
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initialState.zoom *= 2 / 3;
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renderPage();
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});
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</script>
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"""
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"""
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)
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return static, content
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169
akarpov/files/previews/application/pdf_controls.py
Normal file
169
akarpov/files/previews/application/pdf_controls.py
Normal file
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@ -0,0 +1,169 @@
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from akarpov.files.models import File
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def view(file: File):
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static = """
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<link href="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.4.120/web/pdf_viewer.min.css" rel="stylesheet">
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"""
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content = (
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"""
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<header>
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<div class="col-auto">
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<ul class="navigation">
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<li class="navigation__item">
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<!-- Navigate to the Previous and Next pages -->
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<a href="#" class="previous round" id="prev_page">
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<i class="fas fa-arrow-left"></i>
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</a>
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<!-- Navigate to a specific page -->
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<input type="number" value="1" id="current_page" />
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<a href="#" class="next round" id="next_page">
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<i class="fas fa-arrow-right"></i>
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</a>
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<!-- Page Info -->
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Page
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<span id="page_num"></span>
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of
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<span id="page_count"></span>
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</li>
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<!-- Zoom In and Out -->
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<li class="navigation__item">
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<button class="zoom" id="zoom_in">
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<i class="fas fa-search-plus"></i>
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</button>
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<button class="zoom" id="zoom_out">
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<i class="fas fa-search-minus"></i>
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</button>
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</li>
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</ul>
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</header>
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<!-- Canvas to place the PDF -->
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<canvas id="canvas" class="canvas__container w-50"></canvas>
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</div>
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<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.4.120/build/pdf.min.js"></script>
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<script>
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"""
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+ f"""
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const pdf = '{file.file.url}';
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"""
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+ """
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const pageNum = document.querySelector('#page_num');
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const pageCount = document.querySelector('#page_count');
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const currentPage = document.querySelector('#current_page');
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const previousPage = document.querySelector('#prev_page');
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const nextPage = document.querySelector('#next_page');
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const zoomIn = document.querySelector('#zoom_in');
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const zoomOut = document.querySelector('#zoom_out');
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const initialState = {
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pdfDoc: null,
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currentPage: 1,
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pageCount: 0,
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zoom: 1,
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};
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pdfjsLib
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.getDocument(pdf)
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.promise.then((data) => {
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initialState.pdfDoc = data;
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console.log('pdfDocument', initialState.pdfDoc);
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pageCount.textContent = initialState.pdfDoc.numPages;
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renderPage();
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})
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.catch((err) => {
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alert(err.message);
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});
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const renderPage = () => {
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// Load the first page.
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console.log(initialState.pdfDoc, 'pdfDoc');
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initialState.pdfDoc
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.getPage(initialState.currentPage)
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.then((page) => {
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console.log('page', page);
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const canvas = document.querySelector('#canvas');
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const ctx = canvas.getContext('2d');
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const viewport = page.getViewport({
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scale: initialState.zoom,
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});
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canvas.height = viewport.height;
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canvas.width = viewport.width;
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// Render the PDF page into the canvas context.
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const renderCtx = {
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canvasContext: ctx,
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viewport: viewport,
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};
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page.render(renderCtx);
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pageNum.textContent = initialState.currentPage;
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});
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};
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const showPrevPage = () => {
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if (initialState.pdfDoc === null || initialState.currentPage <= 1)
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return;
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initialState.currentPage--;
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// Render the current page.
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currentPage.value = initialState.currentPage;
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renderPage();
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};
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const showNextPage = () => {
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if (
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initialState.pdfDoc === null ||
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initialState.currentPage >= initialState.pdfDoc._pdfInfo.numPages
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)
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return;
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initialState.currentPage++;
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currentPage.value = initialState.currentPage;
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renderPage();
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};
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// Button events.
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previousPage.addEventListener('click', showPrevPage);
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nextPage.addEventListener('click', showNextPage);
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currentPage.addEventListener('keypress', (event) => {
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if (initialState.pdfDoc === null) return;
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// Get the key code.
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const keycode = event.keyCode ? event.keyCode : event.which;
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if (keycode === 13) {
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// Get the new page number and render it.
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let desiredPage = currentPage.valueAsNumber;
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initialState.currentPage = Math.min(
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Math.max(desiredPage, 1),
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initialState.pdfDoc._pdfInfo.numPages,
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);
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currentPage.value = initialState.currentPage;
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renderPage();
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}
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});
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zoomIn.addEventListener('click', () => {
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if (initialState.pdfDoc === null) return;
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initialState.zoom *= 4 / 3;
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renderPage();
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});
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zoomOut.addEventListener('click', () => {
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if (initialState.pdfDoc === null) return;
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initialState.zoom *= 2 / 3;
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renderPage();
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});
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</script>
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"""
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)
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return static, content
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