mirror of
https://github.com/Frooodle/Stirling-PDF.git
synced 2025-10-25 11:17:28 +02:00
sign v2
This commit is contained in:
Anthony Stirling
parent
9af537c985
commit
fd246aac93
@ -66,4 +66,15 @@ public class GeneralWebController {
|
||||
model.addAttribute("currentPage", "split-pdfs");
|
||||
return "split-pdfs";
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
@GetMapping("/sign")
|
||||
@Hidden
|
||||
public String signForm(Model model) {
|
||||
model.addAttribute("currentPage", "sign");
|
||||
return "sign";
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
282
src/main/resources/templates/sign.html
Normal file
282
src/main/resources/templates/sign.html
Normal file
@ -0,0 +1,282 @@
|
||||
<!DOCTYPE html>
|
||||
<html th:lang="${#locale.language}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
|
||||
|
||||
<head>
|
||||
<th:block th:insert="~{fragments/common :: head(title=#{extractImages.title})}"></th:block>
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>PDF Signature App</title>
|
||||
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.0/dist/css/bootstrap.min.css" rel="stylesheet">
|
||||
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.12.313/pdf.min.js"></script>
|
||||
<script src="https://unpkg.com/pdf-lib@1.18.0/dist/umd/pdf-lib.min.js"></script>
|
||||
<script src="https://cdn.jsdelivr.net/npm/signature_pad@4.1.5/dist/signature_pad.umd.min.js"></script>
|
||||
<script src="https://cdnjs.cloudflare.com/ajax/libs/interact.js/1.10.11/interact.min.js"></script>
|
||||
<style>
|
||||
#pdf-container {
|
||||
position: relative;
|
||||
}
|
||||
|
||||
#pdf-canvas {
|
||||
border: 1px solid black;
|
||||
margin-top: 10px;
|
||||
}
|
||||
|
||||
#signature-canvas {
|
||||
border: 1px solid red;
|
||||
position: absolute;
|
||||
touch-action: none;
|
||||
top: 10px; /* Make sure this value matches the margin-top of #pdf-canvas */
|
||||
left: 0;
|
||||
}
|
||||
|
||||
.signature-pad-container {
|
||||
border: 1px solid black;
|
||||
display: none;
|
||||
margin-top: 10px;
|
||||
}
|
||||
|
||||
</style>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<div id="page-container">
|
||||
<div id="content-wrap">
|
||||
<div th:insert="~{fragments/navbar.html :: navbar}"></div>
|
||||
<br> <br>
|
||||
<div class="container">
|
||||
<div class="row justify-content-center">
|
||||
<div class="col-md-6">
|
||||
<h2 th:text="#{extractImages.header}"></h2>
|
||||
<input type="file" id="pdf-upload" accept=".pdf" class="btn btn-outline-primary mb-2" />
|
||||
<input type="file" id="signature-upload" accept="image/*" class="btn btn-outline-primary mb-2" />
|
||||
<button id="toggle-draw-signature" class="btn btn-outline-primary mb-2">Draw signature</button>
|
||||
<button id="download-pdf" class="btn btn-outline-primary mb-2">Download PDF</button>
|
||||
<div id="pdf-container">
|
||||
<canvas id="pdf-canvas"></canvas>
|
||||
<canvas id="signature-canvas" hidden style="position: absolute;" data-scale="1"></canvas>
|
||||
</div>
|
||||
<!-- Signature Pad -->
|
||||
<div class="signature-pad-container">
|
||||
<canvas id="signature-pad-canvas"></canvas>
|
||||
<button id="clear-signature" class="btn btn-outline-danger mt-2">Clear</button>
|
||||
<button id="save-signature" class="btn btn-outline-success mt-2">Save</button>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div th:insert="~{fragments/footer.html :: footer}"></div>
|
||||
</div>
|
||||
<script>
|
||||
document.addEventListener('DOMContentLoaded', () => {
|
||||
const pdfUpload = document.getElementById('pdf-upload');
|
||||
const signatureUpload = document.getElementById('signature-upload');
|
||||
const pdfCanvas = document.getElementById('pdf-canvas');
|
||||
const signatureCanvas = document.getElementById('signature-canvas');
|
||||
const downloadPdfBtn = document.getElementById('download-pdf');
|
||||
const toggleDrawSignatureBtn = document.getElementById('toggle-draw-signature');
|
||||
const signaturePadCanvas = document.getElementById('signature-pad-canvas');
|
||||
const clearSignatureBtn = document.getElementById('clear-signature');
|
||||
const saveSignatureBtn = document.getElementById('save-signature');
|
||||
|
||||
const signaturePad = new SignaturePad(signaturePadCanvas, {
|
||||
minWidth: 1,
|
||||
maxWidth: 2,
|
||||
penColor: 'black',
|
||||
});
|
||||
|
||||
|
||||
const pdfCtx = pdfCanvas.getContext('2d');
|
||||
let pdfDoc = null;
|
||||
|
||||
pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.12.313/pdf.worker.min.js';
|
||||
|
||||
async function loadPdf(pdfData) {
|
||||
pdfDoc = await pdfjsLib.getDocument({ data: pdfData }).promise;
|
||||
renderPage(1);
|
||||
}
|
||||
|
||||
pdfUpload.addEventListener('change', async (event) => {
|
||||
const file = event.target.files[0];
|
||||
if (file) {
|
||||
const pdfData = await file.arrayBuffer();
|
||||
loadPdf(pdfData);
|
||||
}
|
||||
});
|
||||
|
||||
signatureUpload.addEventListener('change', async (event) => {
|
||||
const file = event.target.files[0];
|
||||
if (file) {
|
||||
const reader = new FileReader();
|
||||
reader.onload = (e) => {
|
||||
const img = new Image();
|
||||
img.src = e.target.result;
|
||||
img.onload = () => {
|
||||
const ctx = signatureCanvas.getContext('2d');
|
||||
ctx.drawImage(img, 0, 0, img.width, img.height);
|
||||
signatureCanvas.width = img.width;
|
||||
signatureCanvas.height = img.height;
|
||||
signatureCanvas.hidden = false;
|
||||
setTimeout(() => {
|
||||
const x = 0;
|
||||
const y = 0;
|
||||
signatureCanvas.style.transform = `translate(${x}px, ${y}px)`;
|
||||
signatureCanvas.setAttribute('data-x', x);
|
||||
signatureCanvas.setAttribute('data-y', y);
|
||||
}, 0);
|
||||
};
|
||||
};
|
||||
reader.readAsDataURL(file);
|
||||
}
|
||||
});
|
||||
|
||||
|
||||
let usingSignaturePad = false;
|
||||
|
||||
toggleDrawSignatureBtn.addEventListener('click', () => {
|
||||
usingSignaturePad = !usingSignaturePad;
|
||||
if (usingSignaturePad) {
|
||||
signatureCanvas.width = 0;
|
||||
signatureCanvas.height = 0;
|
||||
}
|
||||
document.querySelector('.signature-pad-container').style.display = usingSignaturePad ? 'block' : 'none';
|
||||
toggleDrawSignatureBtn.textContent = usingSignaturePad
|
||||
? 'Import signature image'
|
||||
: 'Draw signature';
|
||||
});
|
||||
|
||||
|
||||
clearSignatureBtn.addEventListener('click', () => {
|
||||
signaturePad.clear();
|
||||
});
|
||||
|
||||
saveSignatureBtn.addEventListener('click', async () => {
|
||||
if (!signaturePad.isEmpty()) {
|
||||
const dataURL = signaturePad.toDataURL();
|
||||
const img = new Image();
|
||||
img.src = dataURL;
|
||||
img.onload = () => {
|
||||
const ctx = signatureCanvas.getContext('2d');
|
||||
ctx.clearRect(0, 0, signatureCanvas.width, signatureCanvas.height);
|
||||
signatureCanvas.width = img.width;
|
||||
signatureCanvas.height = img.height;
|
||||
ctx.drawImage(img, 0, 0, img.width, img.height);
|
||||
signatureCanvas.hidden = false;
|
||||
setTimeout(() => {
|
||||
const x = 0;
|
||||
const y = 0;
|
||||
signatureCanvas.style.transform = `translate(${x}px, ${y}px)`;
|
||||
signatureCanvas.setAttribute('data-x', x);
|
||||
signatureCanvas.setAttribute('data-y', y);
|
||||
}, 0);
|
||||
};
|
||||
}
|
||||
});
|
||||
|
||||
|
||||
function renderPage(pageNum) {
|
||||
pdfDoc.getPage(pageNum).then((page) => {
|
||||
const viewport = page.getViewport({ scale: 1 });
|
||||
pdfCanvas.width = viewport.width;
|
||||
pdfCanvas.height = viewport.height;
|
||||
|
||||
const renderCtx = {
|
||||
canvasContext: pdfCtx,
|
||||
viewport: viewport,
|
||||
};
|
||||
|
||||
page.render(renderCtx);
|
||||
});
|
||||
}
|
||||
|
||||
interact('#signature-canvas')
|
||||
.draggable({
|
||||
listeners: {
|
||||
move: (event) => {
|
||||
const target = event.target;
|
||||
const x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
|
||||
const y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
|
||||
|
||||
target.style.transform = `translate(${x}px, ${y}px)`;
|
||||
target.setAttribute('data-x', x);
|
||||
target.setAttribute('data-y', y);
|
||||
},
|
||||
},
|
||||
})
|
||||
.resizable({
|
||||
edges: { left: true, right: true, bottom: true, top: true },
|
||||
listeners: {
|
||||
move: (event) => {
|
||||
const target = event.target;
|
||||
const x = (parseFloat(target.getAttribute('data-x')) || 0);
|
||||
const y = (parseFloat(target.getAttribute('data-y')) || 0);
|
||||
|
||||
const newWidth = event.rect.width;
|
||||
const newHeight = event.rect.height;
|
||||
const scale = newWidth / target.width;
|
||||
|
||||
target.style.width = newWidth + 'px';
|
||||
target.style.height = newHeight + 'px';
|
||||
target.setAttribute('data-scale', scale);
|
||||
|
||||
target.style.transform = `translate(${x}px, ${y}px)`;
|
||||
},
|
||||
},
|
||||
modifiers: [
|
||||
interact.modifiers.restrictSize({
|
||||
min: { width: 50, height: 50 },
|
||||
}),
|
||||
],
|
||||
inertia: true,
|
||||
});
|
||||
|
||||
|
||||
async function getSignatureImage() {
|
||||
const dataURL = signatureCanvas.toDataURL();
|
||||
return dataURLToArrayBuffer(dataURL);
|
||||
}
|
||||
|
||||
downloadPdfBtn.addEventListener('click', async () => {
|
||||
if (pdfDoc) {
|
||||
const pdfBytes = await pdfDoc.getData();
|
||||
const pdfDocModified = await PDFLib.PDFDocument.load(pdfBytes);
|
||||
|
||||
if (signatureCanvas) {
|
||||
const signatureBytes = await getSignatureImage();
|
||||
const signatureImageObject = await pdfDocModified.embedPng(signatureBytes);
|
||||
|
||||
const pageIndex = 0; // Choose the page index where the signature should be added (0 is the first page)
|
||||
const page = pdfDocModified.getPages()[pageIndex];
|
||||
|
||||
const targetElement = signatureCanvas;
|
||||
const x = parseFloat(targetElement.getAttribute('data-x')) || 0;
|
||||
const y = parseFloat(targetElement.getAttribute('data-y')) || 0;
|
||||
const scale = parseFloat(targetElement.getAttribute('data-scale')) || 1;
|
||||
|
||||
page.drawImage(signatureImageObject, {
|
||||
x: x,
|
||||
y: page.getHeight() - y - (targetElement.height * scale),
|
||||
width: targetElement.width * scale,
|
||||
height: targetElement.height * scale,
|
||||
});
|
||||
|
||||
}
|
||||
|
||||
const modifiedPdfBytes = await pdfDocModified.save();
|
||||
const blob = new Blob([modifiedPdfBytes], { type: 'application/pdf' });
|
||||
const link = document.createElement('a');
|
||||
link.href = URL.createObjectURL(blob);
|
||||
link.download = 'signed-document.pdf';
|
||||
link.click();
|
||||
}
|
||||
});
|
||||
|
||||
|
||||
|
||||
async function dataURLToArrayBuffer(dataURL) {
|
||||
const response = await fetch(dataURL);
|
||||
return response.arrayBuffer();
|
||||
}
|
||||
|
||||
|
||||
});
|
||||
</script>
|
||||
Loading…
Reference in New Issue
Block a user