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sign v2

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This commit is contained in:
Anthony Stirling 2023-05-02 22:59:16 +01:00
parent 9af537c985
commit fd246aac93
2 changed files with 293 additions and 0 deletions
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11
src/main/java/stirling/software/SPDF/controller/web/GeneralWebController.java
View file

@ -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
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@ -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>