283 lines
11 KiB
HTML
283 lines
11 KiB
HTML
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<!DOCTYPE html>
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<html th:lang="${#locale.language}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
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<head>
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<th:block th:insert="~{fragments/common :: head(title=#{extractImages.title})}"></th:block>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>PDF Signature App</title>
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.0/dist/css/bootstrap.min.css" rel="stylesheet">
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<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.12.313/pdf.min.js"></script>
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<script src="https://unpkg.com/pdf-lib@1.18.0/dist/umd/pdf-lib.min.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/signature_pad@4.1.5/dist/signature_pad.umd.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/interact.js/1.10.11/interact.min.js"></script>
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<style>
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#pdf-container {
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position: relative;
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}
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#pdf-canvas {
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border: 1px solid black;
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margin-top: 10px;
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}
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#signature-canvas {
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border: 1px solid red;
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position: absolute;
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touch-action: none;
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top: 10px; /* Make sure this value matches the margin-top of #pdf-canvas */
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left: 0;
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}
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.signature-pad-container {
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border: 1px solid black;
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display: none;
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margin-top: 10px;
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}
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</style>
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</head>
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<body>
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<div id="page-container">
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<div id="content-wrap">
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<div th:insert="~{fragments/navbar.html :: navbar}"></div>
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<br> <br>
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<div class="container">
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<div class="row justify-content-center">
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<div class="col-md-6">
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<h2 th:text="#{extractImages.header}"></h2>
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<input type="file" id="pdf-upload" accept=".pdf" class="btn btn-outline-primary mb-2" />
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<input type="file" id="signature-upload" accept="image/*" class="btn btn-outline-primary mb-2" />
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<button id="toggle-draw-signature" class="btn btn-outline-primary mb-2">Draw signature</button>
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<button id="download-pdf" class="btn btn-outline-primary mb-2">Download PDF</button>
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<div id="pdf-container">
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<canvas id="pdf-canvas"></canvas>
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<canvas id="signature-canvas" hidden style="position: absolute;" data-scale="1"></canvas>
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</div>
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<!-- Signature Pad -->
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<div class="signature-pad-container">
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<canvas id="signature-pad-canvas"></canvas>
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<button id="clear-signature" class="btn btn-outline-danger mt-2">Clear</button>
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<button id="save-signature" class="btn btn-outline-success mt-2">Save</button>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div th:insert="~{fragments/footer.html :: footer}"></div>
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</div>
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<script>
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document.addEventListener('DOMContentLoaded', () => {
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const pdfUpload = document.getElementById('pdf-upload');
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const signatureUpload = document.getElementById('signature-upload');
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const pdfCanvas = document.getElementById('pdf-canvas');
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const signatureCanvas = document.getElementById('signature-canvas');
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const downloadPdfBtn = document.getElementById('download-pdf');
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const toggleDrawSignatureBtn = document.getElementById('toggle-draw-signature');
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const signaturePadCanvas = document.getElementById('signature-pad-canvas');
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const clearSignatureBtn = document.getElementById('clear-signature');
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const saveSignatureBtn = document.getElementById('save-signature');
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const signaturePad = new SignaturePad(signaturePadCanvas, {
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minWidth: 1,
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maxWidth: 2,
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penColor: 'black',
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});
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const pdfCtx = pdfCanvas.getContext('2d');
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let pdfDoc = null;
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pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.12.313/pdf.worker.min.js';
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async function loadPdf(pdfData) {
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pdfDoc = await pdfjsLib.getDocument({ data: pdfData }).promise;
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renderPage(1);
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}
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pdfUpload.addEventListener('change', async (event) => {
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const file = event.target.files[0];
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if (file) {
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const pdfData = await file.arrayBuffer();
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loadPdf(pdfData);
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}
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});
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signatureUpload.addEventListener('change', async (event) => {
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const file = event.target.files[0];
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if (file) {
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const reader = new FileReader();
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reader.onload = (e) => {
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const img = new Image();
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img.src = e.target.result;
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img.onload = () => {
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const ctx = signatureCanvas.getContext('2d');
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ctx.drawImage(img, 0, 0, img.width, img.height);
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signatureCanvas.width = img.width;
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signatureCanvas.height = img.height;
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signatureCanvas.hidden = false;
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setTimeout(() => {
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const x = 0;
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const y = 0;
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signatureCanvas.style.transform = `translate(${x}px, ${y}px)`;
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signatureCanvas.setAttribute('data-x', x);
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signatureCanvas.setAttribute('data-y', y);
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}, 0);
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};
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};
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reader.readAsDataURL(file);
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}
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});
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let usingSignaturePad = false;
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toggleDrawSignatureBtn.addEventListener('click', () => {
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usingSignaturePad = !usingSignaturePad;
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if (usingSignaturePad) {
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signatureCanvas.width = 0;
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signatureCanvas.height = 0;
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}
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document.querySelector('.signature-pad-container').style.display = usingSignaturePad ? 'block' : 'none';
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toggleDrawSignatureBtn.textContent = usingSignaturePad
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? 'Import signature image'
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: 'Draw signature';
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});
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clearSignatureBtn.addEventListener('click', () => {
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signaturePad.clear();
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});
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saveSignatureBtn.addEventListener('click', async () => {
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if (!signaturePad.isEmpty()) {
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const dataURL = signaturePad.toDataURL();
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const img = new Image();
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img.src = dataURL;
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img.onload = () => {
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const ctx = signatureCanvas.getContext('2d');
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ctx.clearRect(0, 0, signatureCanvas.width, signatureCanvas.height);
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signatureCanvas.width = img.width;
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signatureCanvas.height = img.height;
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ctx.drawImage(img, 0, 0, img.width, img.height);
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signatureCanvas.hidden = false;
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setTimeout(() => {
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const x = 0;
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const y = 0;
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signatureCanvas.style.transform = `translate(${x}px, ${y}px)`;
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signatureCanvas.setAttribute('data-x', x);
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signatureCanvas.setAttribute('data-y', y);
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}, 0);
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};
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}
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});
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function renderPage(pageNum) {
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pdfDoc.getPage(pageNum).then((page) => {
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const viewport = page.getViewport({ scale: 1 });
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pdfCanvas.width = viewport.width;
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pdfCanvas.height = viewport.height;
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const renderCtx = {
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canvasContext: pdfCtx,
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viewport: viewport,
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};
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page.render(renderCtx);
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});
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}
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interact('#signature-canvas')
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.draggable({
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listeners: {
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move: (event) => {
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const target = event.target;
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const x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
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const y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
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target.style.transform = `translate(${x}px, ${y}px)`;
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target.setAttribute('data-x', x);
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target.setAttribute('data-y', y);
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},
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},
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})
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.resizable({
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edges: { left: true, right: true, bottom: true, top: true },
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listeners: {
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move: (event) => {
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const target = event.target;
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const x = (parseFloat(target.getAttribute('data-x')) || 0);
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const y = (parseFloat(target.getAttribute('data-y')) || 0);
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const newWidth = event.rect.width;
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const newHeight = event.rect.height;
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const scale = newWidth / target.width;
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target.style.width = newWidth + 'px';
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target.style.height = newHeight + 'px';
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target.setAttribute('data-scale', scale);
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target.style.transform = `translate(${x}px, ${y}px)`;
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},
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},
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modifiers: [
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interact.modifiers.restrictSize({
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min: { width: 50, height: 50 },
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}),
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],
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inertia: true,
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});
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async function getSignatureImage() {
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const dataURL = signatureCanvas.toDataURL();
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return dataURLToArrayBuffer(dataURL);
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}
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downloadPdfBtn.addEventListener('click', async () => {
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if (pdfDoc) {
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const pdfBytes = await pdfDoc.getData();
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const pdfDocModified = await PDFLib.PDFDocument.load(pdfBytes);
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if (signatureCanvas) {
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const signatureBytes = await getSignatureImage();
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const signatureImageObject = await pdfDocModified.embedPng(signatureBytes);
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const pageIndex = 0; // Choose the page index where the signature should be added (0 is the first page)
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const page = pdfDocModified.getPages()[pageIndex];
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const targetElement = signatureCanvas;
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const x = parseFloat(targetElement.getAttribute('data-x')) || 0;
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const y = parseFloat(targetElement.getAttribute('data-y')) || 0;
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const scale = parseFloat(targetElement.getAttribute('data-scale')) || 1;
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page.drawImage(signatureImageObject, {
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x: x,
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y: page.getHeight() - y - (targetElement.height * scale),
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width: targetElement.width * scale,
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height: targetElement.height * scale,
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});
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}
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const modifiedPdfBytes = await pdfDocModified.save();
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const blob = new Blob([modifiedPdfBytes], { type: 'application/pdf' });
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const link = document.createElement('a');
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link.href = URL.createObjectURL(blob);
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link.download = 'signed-document.pdf';
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link.click();
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}
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});
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async function dataURLToArrayBuffer(dataURL) {
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const response = await fetch(dataURL);
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return response.arrayBuffer();
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}
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});
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</script>
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