DGNum/Stirling-PDF
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WIP: Adds textarea and multi line support for pdf sign.

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This commit is contained in:
Dimitrios Kaitantzidis 2023-10-07 22:54:11 +03:00
parent 7205801e76
commit 88a90f22a3
1 changed files with 46 additions and 5 deletions
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51
src/main/resources/templates/sign.html
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@ -179,7 +179,7 @@ select#font-select, select#font-select option {
</div>
<div class="tab-container" th:title="#{sign.text}">
<label class="form-check-label" for="sigText" th:text="#{text}"></label>
<input type="text" class="form-control" id="sigText" name="sigText">
<textarea class="form-control" id="sigText" name="sigText" rows="3"></textarea>
<label th:text="#{font}"></label>
<select class="form-control" name="font" id="font-select">
<option th:each="font : ${fonts}"
@ -188,7 +188,13 @@ select#font-select, select#font-select option {
th:class="${font.name.toLowerCase()+'-font'}">
</option>
</select>
<!--TODO add specific key for font size-->
<!-- <label for="form-select" th:text="#{watermark.selectText.3}"></label>-->
<!-- <select class="form-control" name="size" id="form-select">-->
<!-- <option value="16">16px</option>-->
<!-- <option value="32">32px</option>-->
<!-- <option value="64">64px</option>-->
<!-- </select>-->
<div class="margin-auto-parent">
<button id="save-text-signature" class="btn btn-outline-success mt-2 margin-center" onclick="addDraggableFromText()" th:text="#{sign.add}"></button>
</div>
@ -196,18 +202,53 @@ select#font-select, select#font-select option {
function addDraggableFromText() {
const sigText = document.getElementById('sigText').value;
const font = document.querySelector('select[name=font]').value;
// const fontSize = document.querySelector('select[name=size]').value;
// console.log("fontSize: " + fontSize)
const fontSize = 100;
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
ctx.font = `${fontSize}px ${font}`;
const textWidth = ctx.measureText(sigText).width;
const textHeight = fontSize;
let yAxis = fontSize * .4;
let paragraphs = sigText.split(/\r?\n/);
let lengthiestParagraph = paragraphs[0];
for (let i = 0; i < paragraphs.length; i++) {
let previousParagraph;
let currentParagraph = paragraphs[i];
if (i === 0) {
previousParagraph = '';
} else {
previousParagraph = paragraphs[i-1];
}
if (currentParagraph.length > previousParagraph.length)
lengthiestParagraph = currentParagraph;
ctx.fillText(currentParagraph, 0, yAxis, fontSize);
yAxis += fontSize * .8;
}
console.log("lengthiest pagragraph: " + lengthiestParagraph);
const textWidth = ctx.measureText(lengthiestParagraph).width;
// const textHeight = fontSize;
const textHeight = fontSize * 1.6;
canvas.width = textWidth;
canvas.height = textHeight*1.35; //for tails
ctx.font = `${fontSize}px ${font}`;
ctx.fillText(sigText, 0, fontSize);
// console.log(sigText);
console.log(sigText.split(/\r?\n/));
// ctx.fillText(sigText, 0, fontSize);
const dataURL = canvas.toDataURL();
DraggableUtils.createDraggableCanvasFromUrl(dataURL);