From 3c47f21337e3be7e8ccb09bc06b6ffec38ffa893 Mon Sep 17 00:00:00 2001
From: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>
Date: Sat, 6 May 2023 00:48:56 +0100
Subject: [PATCH] sign with text init

---
 src/main/resources/messages_en_GB.properties |  5 ++
 src/main/resources/static/images/flatten.svg | 41 ++++++++++++
 src/main/resources/templates/sign.html       | 70 ++++++++++++++++++--
 3 files changed, 110 insertions(+), 6 deletions(-)
 create mode 100644 src/main/resources/static/images/flatten.svg

diff --git a/src/main/resources/messages_en_GB.properties b/src/main/resources/messages_en_GB.properties
index 6ac9683c..54a12f76 100644
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -108,6 +108,11 @@ home.PDFToXML.desc=Convert PDF to XML format
 home.ScannerImageSplit.title=Detect/Split Scanned photos
 home.ScannerImageSplit.desc=Splits multiple photos from within a photo/PDF
 
+home.sign.title=Sign
+home.sign.desc=Adds signature to PDF by drawing, text or image
+
+home.flatten.title=Flatten
+home.flatten.desc=Remove all interactive elements and forms from a PDF
 
 
 ScannerImageSplit.selectText.1=Angle Threshold:
diff --git a/src/main/resources/static/images/flatten.svg b/src/main/resources/static/images/flatten.svg
new file mode 100644
index 00000000..944240cf
--- /dev/null
+++ b/src/main/resources/static/images/flatten.svg
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   width="16"
+   height="16"
+   fill="currentColor"
+   class="bi bi-ui-checks"
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg826"
+   sodipodi:docname="no-checklist-black.svg"
+   inkscape:version="1.1.1 (3bf5ae0d25, 2021-09-20)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs830" />
+  <sodipodi:namedview
+     id="namedview828"
+     pagecolor="#ffffff"
+     bordercolor="#999999"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="55.8125"
+     inkscape:cx="12.452408"
+     inkscape:cy="11.950728"
+     inkscape:current-layer="svg826" />
+  <path
+     d="M 7,2.5 C 7,2.2238576 7.2238576,2 7.5,2 h 7 C 14.776142,2 15,2.2238576 15,2.5 v 1 C 15,3.7761424 14.776142,4 14.5,4 h -7 C 7.2238576,4 7,3.7761424 7,3.5 Z M 2,1 C 0.8954305,1 0,1.8954305 0,3 V 5 C 0,6.1045695 0.8954305,7 2,7 H 4 C 5.1045695,7 6,6.1045695 6,5 V 3 C 6,1.8954305 5.1045695,1 4,1 Z M 2,9 C 0.8954305,9 0,9.8954305 0,11 v 2 c 0,1.104569 0.8954305,2 2,2 h 2 c 1.1045695,0 2,-0.895431 2,-2 V 11 C 6,9.8954305 5.1045695,9 4,9 Z M 2.854,5.354 c -0.1953639,0.1958584 -0.5126361,0.1958584 -0.708,0 l -1,-1 C 0.6740002,3.8820002 1.3820002,3.1740002 1.854,3.646 L 2.5,4.293 4.146,2.646 C 4.6179998,2.1740002 5.3259998,2.8820002 4.854,3.354 Z m 0,8 c -0.1953639,0.195858 -0.5126361,0.195858 -0.708,0 l -1,-1 C 0.67400022,11.882 1.3820002,11.174 1.854,11.646 L 2.5,12.293 4.146,10.646 c 0.4719998,-0.472 1.1799998,0.236 0.708,0.708 z M 7,10.5 C 7,10.223858 7.2238576,10 7.5,10 h 7 c 0.276142,0 0.5,0.223858 0.5,0.5 v 1 c 0,0.276142 -0.223858,0.5 -0.5,0.5 h -7 C 7.2238576,12 7,11.776142 7,11.5 Z m 0,-5 C 7,5.2238576 7.2238576,5 7.5,5 h 5 c 0.666666,0 0.666666,1 0,1 h -5 C 7.2238576,6 7,5.7761424 7,5.5 Z m 0,8 C 7,13.223858 7.2238576,13 7.5,13 h 5 c 0.666666,0 0.666666,1 0,1 h -5 C 7.2238576,14 7,13.776142 7,13.5 Z"
+     id="path824"
+     sodipodi:nodetypes="sssssssssssssssssssssssssssccscccscccscccscsssssssssssssssssssss"
+     style="fill:#000000" />
+  <path
+     d="m 0.14896862,0.16984545 c 0.1879493,-0.2023109 0.51141627,-0.22131574 0.7066285,-0.026004 L 15.795251,15.091111 c 0.471284,0.471524 -0.209339,1.204159 -0.680625,0.732632 L 0.17497212,0.87647378 C -0.02024026,0.68116189 -0.03898081,0.37215613 0.14896862,0.16984545 Z"
+     id="path937"
+     sodipodi:nodetypes="ssssss"
+     style="fill:#000000" />
+</svg>
diff --git a/src/main/resources/templates/sign.html b/src/main/resources/templates/sign.html
index cc9d2dfc..34ec5ad3 100644
--- a/src/main/resources/templates/sign.html
+++ b/src/main/resources/templates/sign.html
@@ -10,6 +10,11 @@
     <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>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Estonia&family=Tangerine&family=Windsong&display=swap" rel="stylesheet">
+        
+    
     <style>
        #pdf-container {
             position: relative;
@@ -59,9 +64,11 @@
 
                         <div class = "btn-group">
                             <input type="radio" class="btn-check" name="signature-type" id="draw-signature" autocomplete="off" checked>
-                            <label class="btn btn-outline-secondary" for="draw-signature">Draw signature</label>
+                            <label class="btn btn-outline-secondary" for="draw-signature">Draw</label>
                             <input type="radio" class="btn-check" name="signature-type" id="import-image" autocomplete="off">
-                            <label class="btn btn-outline-secondary" for="import-image">Import image</label>
+                            <label class="btn btn-outline-secondary" for="import-image">Import</label>
+                            <input type="radio" class="btn-check" name="signature-type" id="type-signature" autocomplete="off">
+                            <label class="btn btn-outline-secondary" for="type-signature">Type</label>
                         </div>
                         
                         <div th:replace="~{fragments/common :: fileSelector(name='signature-upload', multiple=false, accept='image/*', inputText=#{imgPrompt})}"></div>
@@ -73,6 +80,18 @@
                             <button id="save-signature" class="btn btn-outline-success mt-2">Save</button>
                         </div>
 
+                        <div id="signature-type-container">
+                            <label class="form-check-label" for="sigText">Signature</label> 
+                            <input type="text" class="form-control" id="sigText" name="sigText">
+                            <label>Font:</label> 
+                            <select class="form-control" name="font" id="font-select">
+                                <option value="Estonia" class="estonia-font">Estonia</option>
+                                <option value="Tangerine" class="tangerine-font">Tangerine</option>
+                                <option value="Windsong" class="windsong-font">Windsong</option>
+                            </select>
+                            <button id="save-text-signature" class="btn btn-outline-success mt-2">Save</button>
+                        </div>
+                        
                         <div id="pdf-container">
                             <canvas id="pdf-canvas"></canvas>
                             <canvas id="signature-canvas" hidden style="position: absolute;" data-scale="1"></canvas>
@@ -87,6 +106,15 @@
     </div>
     <script>
         document.addEventListener('DOMContentLoaded', () => {
+        	
+        	const fontSelect = document.getElementById('font-select');
+        	fontSelect.addEventListener('change', (event) => {
+        	    const selectedFont = event.target.value;
+        	    fontSelect.style.fontFamily = selectedFont;
+        	});
+
+        	fontSelect.style.fontFamily = fontSelect.value; // Set the initial font family
+
             const pdfUpload = document.querySelector('input[name=pdf-upload]');
             const signatureUpload = document.querySelector('input[name=signature-upload]');
             const pdfCanvas = document.getElementById('pdf-canvas');
@@ -96,9 +124,9 @@
             const signaturePadCanvas = document.getElementById('signature-pad-canvas');
             const clearSignatureBtn = document.getElementById('clear-signature');
             const saveSignatureBtn = document.getElementById('save-signature');
-
+            const signatureTypeContainer = document.getElementById('signature-type-container');
             document.querySelector('input[name=signature-upload]').closest(".custom-file-chooser").style.display = "none"
-
+            signatureTypeContainer.style.display =  'none';
             const signaturePad = new SignaturePad(signaturePadCanvas, {
                 minWidth: 1,
                 maxWidth: 2,
@@ -126,15 +154,44 @@
 
             $("input[name=signature-type]").change(function() {
                 const drawSignatureInput = document.getElementById('draw-signature');
+                const importImageInput = document.getElementById('import-image');
+                const typeSignatureInput = document.getElementById('type-signature');
+                
                 signaturePadContainer.style.display = drawSignatureInput.checked ? 'block' : 'none';
-                document.querySelector('input[name=signature-upload]').closest(".custom-file-chooser").style.display = drawSignatureInput.checked ? 'none' : 'block';
+                signatureTypeContainer.style.display = typeSignatureInput.checked ? 'block' : 'none';
+                document.querySelector('input[name=signature-upload]').closest(".custom-file-chooser").style.display = importImageInput.checked ? 'block' : 'none';
 
                 if (drawSignatureInput.checked) {
                     populateSignatureFromPad();
-                } else {
+                } else if (importImageInput.checked) {
                     populateSignatureFromFileUpload();
                 }
             });
+
+            
+            const saveTextSignatureBtn = document.getElementById('save-text-signature');
+            saveTextSignatureBtn.addEventListener('click', () => {
+                if (!document.getElementById('type-signature').checked) return;
+
+                const sigText = document.getElementById('sigText').value;
+                const font = document.querySelector('select[name=font]').value;
+                const fontSize = 50;
+
+                const canvas = document.createElement('canvas');
+                const ctx = canvas.getContext('2d');
+                ctx.font = `${fontSize}px ${font}`;
+                const textWidth = ctx.measureText(sigText).width;
+                const textHeight = fontSize;
+
+                canvas.width = textWidth;
+                canvas.height = textHeight*1.35; //for tails
+                ctx.font = `${fontSize}px ${font}`;
+                ctx.fillText(sigText, 0, fontSize);
+
+                const dataURL = canvas.toDataURL();
+                populateSignature(dataURL);
+            });
+
             
             function populateSignature(imgUrl) {
                 const img = new Image();
@@ -178,6 +235,7 @@
                 reader.readAsDataURL(file);
             }
             function populateSignatureFromPad() {
+            	if (!document.getElementById('draw-signature').checked) return;
                 if (signaturePad.isEmpty()) return;
 
                 const dataURL = signaturePad.toDataURL();