Onboarding / Deployment Scripts / Marketing updates
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<script lang="ts">
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import { onMount } from 'svelte';
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export let value = '';
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export let disabled = false;
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let canvas: HTMLCanvasElement;
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let isDrawing = false;
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let hasSigned = false;
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let activePointerId: number | null = null;
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let lines: { x: number; y: number }[][] = [];
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function resizeCanvas() {
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if (!canvas) return;
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const ratio = Math.max(window.devicePixelRatio || 1, 1);
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const rect = canvas.getBoundingClientRect();
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canvas.width = Math.max(1, Math.round(rect.width * ratio));
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canvas.height = Math.max(1, Math.round(rect.height * ratio));
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const ctx = canvas.getContext('2d');
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if (!ctx) return;
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ctx.setTransform(ratio, 0, 0, ratio, 0, 0);
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drawAllLines();
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syncValue();
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}
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function getContext() {
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return canvas?.getContext('2d') ?? null;
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}
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function drawAllLines() {
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const ctx = getContext();
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if (!ctx || !canvas) return;
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const width = canvas.width / Math.max(window.devicePixelRatio || 1, 1);
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const height = canvas.height / Math.max(window.devicePixelRatio || 1, 1);
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ctx.clearRect(0, 0, width, height);
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ctx.lineCap = 'round';
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ctx.lineJoin = 'round';
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ctx.strokeStyle = '#213021';
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ctx.lineWidth = 3;
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for (const line of lines) {
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if (!line.length) continue;
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ctx.beginPath();
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ctx.moveTo(line[0].x, line[0].y);
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if (line.length === 1) {
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ctx.lineTo(line[0].x + 0.01, line[0].y + 0.01);
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} else {
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for (const point of line.slice(1)) {
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ctx.lineTo(point.x, point.y);
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}
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}
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ctx.stroke();
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}
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}
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function pointFromEvent(event: PointerEvent) {
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const rect = canvas.getBoundingClientRect();
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return {
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x: event.clientX - rect.left,
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y: event.clientY - rect.top
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};
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}
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function syncValue() {
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value = hasSigned && canvas ? canvas.toDataURL('image/png') : '';
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}
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function startDrawing(event: PointerEvent) {
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if (disabled) return;
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activePointerId = event.pointerId;
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isDrawing = true;
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canvas.setPointerCapture(event.pointerId);
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const point = pointFromEvent(event);
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lines = [...lines, [point]];
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hasSigned = true;
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drawAllLines();
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syncValue();
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}
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function continueDrawing(event: PointerEvent) {
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if (!isDrawing || disabled || activePointerId !== event.pointerId) return;
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const point = pointFromEvent(event);
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const nextLines = [...lines];
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const currentLine = nextLines[nextLines.length - 1];
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if (!currentLine) return;
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currentLine.push(point);
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lines = nextLines;
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drawAllLines();
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syncValue();
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}
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function stopDrawing(event?: PointerEvent) {
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if (event && activePointerId === event.pointerId && canvas.hasPointerCapture(event.pointerId)) {
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canvas.releasePointerCapture(event.pointerId);
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}
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activePointerId = null;
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isDrawing = false;
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syncValue();
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}
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export function clear() {
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lines = [];
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hasSigned = false;
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drawAllLines();
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syncValue();
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}
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onMount(() => {
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resizeCanvas();
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window.addEventListener('resize', resizeCanvas);
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return () => {
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window.removeEventListener('resize', resizeCanvas);
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};
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});
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</script>
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<div class:signature-disabled={disabled} class="signature-shell">
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<canvas
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bind:this={canvas}
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class="signature-canvas"
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aria-label="Draw your signature"
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on:pointerdown={startDrawing}
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on:pointermove={continueDrawing}
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on:pointerup={stopDrawing}
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on:pointerleave={stopDrawing}
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on:pointercancel={stopDrawing}
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></canvas>
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{#if !value}
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<div class="signature-hint" aria-hidden="true">Sign here</div>
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{/if}
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</div>
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<style>
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.signature-shell {
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position: relative;
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width: 100%;
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min-height: 180px;
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border-radius: 18px;
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background: #fff;
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overflow: hidden;
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}
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.signature-shell.signature-disabled {
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opacity: 0.7;
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}
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.signature-canvas {
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display: block;
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width: 100%;
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height: 180px;
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touch-action: none;
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cursor: crosshair;
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}
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.signature-disabled .signature-canvas {
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cursor: not-allowed;
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}
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.signature-hint {
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position: absolute;
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inset: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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font-family: var(--font-head);
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font-size: 24px;
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color: rgba(33, 48, 33, 0.22);
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pointer-events: none;
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}
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@media (max-width: 768px) {
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.signature-shell {
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min-height: 160px;
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}
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.signature-canvas {
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height: 160px;
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}
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.signature-hint {
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font-size: 21px;
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}
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}
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</style>
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