eminuxandCursor
b84321346f
Traccia i movimenti aggregati, overlay a gradienti sull’iframe della pagina e toggle click/move in admin. Co-authored-by: Cursor <cursoragent@cursor.com>
68 lines
2.1 KiB
JavaScript
68 lines
2.1 KiB
JavaScript
/*! Admin heatmap overlay renderer (Hotjar-like radial blobs over page preview). */
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(function () {
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function colorFor(t) {
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// green -> yellow -> red
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if (t < 0.33) {
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var k = t / 0.33;
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return [67 + (255 - 67) * k, 160 + (235 - 160) * k, 71 * (1 - k)];
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}
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if (t < 0.66) {
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var k2 = (t - 0.33) / 0.33;
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return [255, 235 - (235 - 152) * k2, 0];
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}
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var k3 = (t - 0.66) / 0.34;
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return [255, 152 * (1 - k3), 0];
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}
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function paint() {
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var canvas = document.getElementById("admin-heatmap");
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var stage = document.getElementById("admin-heatmap-stage");
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if (!canvas || !stage) return;
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var grid = parseInt(canvas.getAttribute("data-grid"), 10) || 40;
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var max = parseInt(canvas.getAttribute("data-max"), 10) || 1;
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var cells = [];
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try {
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cells = JSON.parse(canvas.getAttribute("data-cells") || "[]");
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} catch (e) {
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cells = [];
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}
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var width = Math.max(stage.clientWidth, 320);
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var height = Math.max(stage.clientHeight, 480);
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canvas.width = width;
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canvas.height = height;
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canvas.style.width = width + "px";
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canvas.style.height = height + "px";
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var ctx = canvas.getContext("2d");
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ctx.clearRect(0, 0, width, height);
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var cellW = width / grid;
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var cellH = height / grid;
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var radius = Math.max(cellW, cellH) * 1.8;
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cells.forEach(function (cell) {
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var intensity = Math.min(1, cell.c / max);
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if (intensity <= 0) return;
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var cx = (cell.x + 0.5) * cellW;
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var cy = (cell.y + 0.5) * cellH;
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var rgb = colorFor(intensity);
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var grd = ctx.createRadialGradient(cx, cy, 0, cx, cy, radius);
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grd.addColorStop(0, "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + "," + (0.2 + intensity * 0.55) + ")");
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grd.addColorStop(1, "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + ",0)");
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ctx.fillStyle = grd;
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ctx.beginPath();
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ctx.arc(cx, cy, radius, 0, Math.PI * 2);
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ctx.fill();
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});
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}
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if (document.readyState === "loading") {
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document.addEventListener("DOMContentLoaded", paint);
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} else {
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paint();
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}
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window.addEventListener("resize", paint);
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})();
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