From 1fe1d13c600b7dfe421b3b99b833b7d5d1232724 Mon Sep 17 00:00:00 2001
From: Dennis Fink
Date: Thu, 23 Jul 2026 00:18:21 +0200
Subject: Add GPX trail maps to blog posts

This adds a trail flow block so posts can include attached GPX files as
interactive maps with route display, elevation charts, activity
summaries, and start/finish markers.

The trail assets are loaded only when needed, keeping the shared
templates clean while vendoring the Leaflet dependencies required for
offline, self-hosted map rendering.
---
 .../leaflet-elevation/src/handlers/acceleration.js | 64 ++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 assets/static/vendor/leaflet-elevation/src/handlers/acceleration.js

(limited to 'assets/static/vendor/leaflet-elevation/src/handlers/acceleration.js')

diff --git a/assets/static/vendor/leaflet-elevation/src/handlers/acceleration.js b/assets/static/vendor/leaflet-elevation/src/handlers/acceleration.js
new file mode 100644
index 0000000..9b31b5c
--- /dev/null
+++ b/assets/static/vendor/leaflet-elevation/src/handlers/acceleration.js
@@ -0,0 +1,64 @@
+export function Acceleration() {
+
+	const _ = L.Control.Elevation.Utils;
+
+	let opts         = this.options;
+	let acceleration = {};
+
+	acceleration.label      = opts.accelerationLabel  || L._(opts.imperial ? 'ft/s²' : 'm/s²');
+	opts.accelerationFactor = opts.accelerationFactor || 1;
+
+	return {
+		name: 'acceleration',
+		unit: acceleration.label,
+		deltaMax: this.options.accelerationDeltaMax,
+		clampRange: this.options.accelerationRange,
+		decimals: 2,
+		pointToAttr: (_, i) => {
+			let dv     = (this._data[i].speed - this._data[i > 0 ? i - 1 : i].speed) * (1000 / opts.timeFactor);
+			let dt     = (this._data[i].time - this._data[i > 0 ? i - 1 : i].time) / 1000;
+			return dt > 0 ? Math.abs((dv / dt)) * opts.accelerationFactor : NaN;
+		},
+		stats: { max: _.iMax, min: _.iMin, avg: _.iAvg },
+		scale: {
+			axis       : "y",
+			position   : "right",
+			scale      : { min: 0, max: +1 },
+			tickPadding: 16,
+			labelX     : 25,
+			labelY     : -8,
+		},
+		path: {
+			label        : 'Acceleration',
+			yAttr        : 'acceleration',
+			scaleX       : 'distance',
+			scaleY       : 'acceleration',
+			color        : '#050402',
+			strokeColor  : '#000',
+			strokeOpacity: "0.5",
+			fillOpacity  : "0.25",
+		},
+		tooltip: {
+			chart: (item) => L._("a: ") + item.acceleration + " " + acceleration.label,
+			marker: (item) => Math.round(item.acceleration) + " " + acceleration.label,
+			order: 60,
+		},
+		summary: {
+			"minacceleration"  : {
+				label: "Min Acceleration: ",
+				value: (track, unit) => Math.round(track.acceleration_min || 0) + ' ' + unit,
+				order: 60
+			},
+			"maxacceleration"  : {
+				label: "Max Acceleration: ",
+				value: (track, unit) => Math.round(track.acceleration_max || 0) + ' ' + unit,
+				order: 61
+			},
+			"avgacceleration": {
+				label: "Avg Acceleration: ",
+				value: (track, unit) => Math.round(track.acceleration_avg || 0) + ' ' + unit,
+				order: 62
+			},
+		}
+	};
+}
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