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control.js
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control.js
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import * as _ from './utils';
import { Options } from './options';
// "leaflet-i18n" fallback
if (!L._ || !L.i18n) {
L._ = L.i18n = (string, data) => string;
}
// Prevent CORS issues for relative locations (dynamic import)
const baseURL = ((document.currentScript && document.currentScript.src) || (import.meta && import.meta.url)).split("/").slice(0,-1).join("/") + '/';
export const Elevation = L.Control.Elevation = L.Control.extend({
includes: L.Evented ? L.Evented.prototype : L.Mixin.Events,
options: Options,
__mileFactor: 0.621371, // 1 km = (0.621371 mi)
__footFactor: 3.28084, // 1 m = (3.28084 ft)
__D3: 'https://unpkg.com/[email protected]/dist/d3.min.js',
__TOGEOJSON: 'https://unpkg.com/@tmcw/[email protected]/dist/togeojson.umd.js',
__LGEOMUTIL: 'https://unpkg.com/[email protected]/src/leaflet.geometryutil.js',
__LALMOSTOVER: 'https://unpkg.com/[email protected]/src/leaflet.almostover.js',
__LHOTLINE: '../libs/leaflet-hotline.min.js',
__LDISTANCEM: '../libs/leaflet-distance-marker.min.js',
__LCHART: '../src/components/chart.js',
__LMARKER: '../src/components/marker.js',
__LSUMMARY: '../src/components/summary.js',
__modulesFolder: '../src/handlers/',
__btnIcon: baseURL + '../images/elevation.svg',
/*
* Add data to the diagram either from GPX or GeoJSON and update the axis domain and data
*/
addData: function(d, layer) {
this.import(this.__D3)
.then(() => {
if (this._modulesLoaded) {
layer = layer ?? (d.on && d);
this._addData(d);
this._addLayer(layer);
this._fireEvt("eledata_added", { data: d, layer: layer, track_info: this.track_info });
} else {
this.once('modules_loaded', () => this.addData(d,layer));
}
});
},
/**
* Adds the control to the given map.
*/
addTo: function(map) {
if (this.options.detached) {
let parent = _.select(this.options.elevationDiv);
let eleDiv = this.onAdd(map);
parent ? _.append(parent, eleDiv) : _.insert(map.getContainer(), eleDiv, 'afterend');
} else {
L.Control.prototype.addTo.call(this, map);
}
return this;
},
/*
* Reset data and display
*/
clear: function() {
if (this._marker) this._marker.remove();
if (this._chart) this._clearChart();
if (this._layers) this._clearLayers(this._layers);
if (this._markers) this._clearLayers(this._markers);
if (this._circleMarkers) this._circleMarkers.remove();
if (this._hotline) this._clearLayers(this._hotline);
this._data = [];
this.track_info = {};
this._fireEvt("eledata_clear");
this._updateChart();
},
_clearChart: function() {
if (this._events && this._events.elechart_updated) {
this._events.elechart_updated.forEach(({fn, ctx}) => this.off('elechart_updated', fn, ctx));
}
if (this._chart && this._chart._container) {
this._chart._container.selectAll('g.point .point').remove();
this._chart.clear();
}
},
_clearLayers: function(l) {
l = l || this._layers;
if (l && l.eachLayer) {
l.eachLayer(f => f.remove())
l.clearLayers();
}
},
/**
* TODO: Create a base class to handle custom data attributes (heart rate, cadence, temperature, ...)
*
* @link https://leafletjs.com/examples/extending/extending-3-controls.html#handlers
*/
// addHandler: function (name, HandlerClass) {
// if (HandlerClass) {
// let handler = this[name] = new HandlerClass(this);
// this.handlers.push(handler);
// if (this.options[name]) {
// handler.enable();
// }
// }
// return this;
// },
/**
* Disable chart brushing.
*/
disableBrush: function() {
this._chart._brushEnabled = false;
this._resetDrag();
},
/**
* Enable chart brushing.
*/
enableBrush: function() {
this._chart._brushEnabled = true;
},
/**
* Disable chart zooming.
*/
disableZoom: function() {
this._chart._zoomEnabled = false;
this._chart._resetZoom();
},
/**
* Enable chart zooming.
*/
enableZoom: function() {
this._chart._zoomEnabled = true;
},
/**
* Sets a map view that contains the given geographical bounds.
*/
fitBounds: function(bounds) {
bounds = bounds || this.getBounds();
if (this._map && bounds.isValid()) this._map.fitBounds(bounds);
},
getBounds: function(data) {
return L.latLngBounds((data || this._data).map((d) => d.latlng));
},
/**
* Get default zoom level (followMarker: true).
*/
getZFollow: function() {
return this.options.zFollow;
},
/**
* Hide current elevation chart profile.
*/
hide: function() {
_.style(this._container, "display", "none");
},
/**
* Initialize chart control "options" and "container".
*/
initialize: function(opts) {
opts = L.setOptions(this, opts);
this._data = [];
this._layers = L.featureGroup();
this._markers = L.featureGroup();
this._hotline = L.featureGroup();
this._circleMarkers = L.featureGroup();
this._markedSegments = L.polyline([]);
this._start = L.circleMarker([0,0], (opts.trkStart || Options.trkStart));
this._end = L.circleMarker([0,0], (opts.trkEnd || Options.trkEnd));
this._chartEnabled = true;
this._yCoordMax = -Infinity;
this.track_info = {};
// this.handlers = [];
if (opts.followMarker) this._setMapView = _.throttle(this._setMapView, 300, this);
if (opts.legend) opts.margins.bottom += 30;
if (opts.theme) opts.polylineSegments.className += ' ' + opts.theme;
if (opts.wptIcons === true) opts.wptIcons = Options.wptIcons;
if (opts.distanceMarkers === true) opts.distanceMarkers = Options.distanceMarkers;
if (opts.trkStart) this._start.addTo(this._circleMarkers);
if (opts.trkEnd) this._end.addTo(this._circleMarkers);
this._markedSegments.setStyle(opts.polylineSegments);
// Leaflet canvas renderer colors
L.extend(_.Colors, opts.colors || {});
// Various stuff
this._fixCanvasPaths();
this._fixTooltipSize();
},
/**
* Javascript scripts downloader (lazy loader)
*/
import: function(src, condition) {
switch(src) {
case this.__D3: condition = typeof d3 !== 'object'; break;
case this.__TOGEOJSON: condition = typeof toGeoJSON !== 'object'; break;
case this.__LGEOMUTIL: condition = typeof L.GeometryUtil !== 'object'; break;
case this.__LALMOSTOVER: condition = typeof L.Handler.AlmostOver !== 'function'; break;
case this.__LDISTANCEM: condition = typeof L.DistanceMarkers !== 'function'; break;
case this.__LHOTLINE: condition = typeof L.Hotline !== 'function'; break;
}
src = (src.startsWith('../') || src.startsWith('./') ? baseURL : '') + src;
return condition !== false ? import(src) : Promise.resolve();
},
/**
* Load elevation data (GPX, GeoJSON, KML or TCX).
*/
load: function(data) {
this._parseFromString(data).then( geojson => geojson ? this._loadLayer(geojson) : this._loadFile(data));
},
/**
* Create container DOM element and related event listeners.
* Called on control.addTo(map).
*/
onAdd: function(map) {
this._map = map;
let container = this._container = _.create("div", "elevation-control " + this.options.theme + " " + (this.options.detached ? 'elevation-detached' : 'leaflet-control'), this.options.detached ? { id: 'elevation-' + _.randomId() } : {});
if (!this.eleDiv) this.eleDiv = container;
this._loadModules(this.options.handlers).then(() => { // Inject here required modules (data handlers)
this._initChart(container);
this._initButton(container);
this._initSummary(container);
this._initMarker(map);
this._initLayer(map);
this._modulesLoaded = true;
this.fire('modules_loaded');
});
this.fire('add');
return container;
},
/**
* Clean up control code and related event listeners.
* Called on control.remove().
*/
onRemove: function(map) {
this._container = null;
map
.off('zoom viewreset zoomanim', this._hideMarker, this)
.off('resize', this._resetView, this)
.off('resize', this._resizeChart, this)
.off('mousedown', this._resetDrag, this);
_.off(map.getContainer(), 'mousewheel', this._resetDrag, this);
_.off(map.getContainer(), 'touchstart', this._resetDrag, this);
_.off(document, 'keydown', this._onKeyDown, this);
this
.off('eledata_added eledata_loaded', this._updateChart, this)
.off('eledata_added eledata_loaded', this._updateSummary, this);
this.fire('remove');
},
/**
* Redraws the chart control. Sometimes useful after screen resize.
*/
redraw: function() {
this._resizeChart();
},
/**
* Set default zoom level (followMarker: true).
*/
setZFollow: function(zoom) {
this.options.zFollow = zoom;
},
/**
* Hide current elevation chart profile.
*/
show: function() {
_.style(this._container, "display", "block");
},
/*
* Parsing data either from GPX or GeoJSON and update the diagram data
*/
_addData: function(d) {
if (!d) {
return;
}
// Standard GeoJSON
if (d.type === "FeatureCollection" ) {
return _.each(d.features, feature => this._addData(feature));
} else if (d.type === "Feature") {
let geom = d.geometry;
if (geom) {
switch (geom.type) {
case 'LineString': return this._addGeoJSONData(geom.coordinates, d.properties);
case 'MultiLineString': return _.each(geom.coordinates, (coords, i) => this._addGeoJSONData(coords, d.properties, i));
case 'Point':
default: return console.warn('Unsopperted GeoJSON feature geometry type:' + geom.type);
}
}
}
// Fallback for leaflet layers (eg. L.Gpx)
if (d._latlngs) {
return this._addGeoJSONData(d._latlngs, d.feature && d.feature.properties);
}
},
/*
* Parsing of GeoJSON data lines and their elevation in z-coordinate
*/
_addGeoJSONData: function(coords, properties, nestingLevel) {
// "coordinateProperties" property is generated inside "@tmcw/toGeoJSON"
let props = (properties && properties.coordinateProperties) || properties;
coords.forEach((point, i) => {
// GARMIN_EXTENSIONS = ["hr", "cad", "atemp", "wtemp", "depth", "course", "bearing"];
point.meta = point.meta ?? { time: null, ele: null };
point.prev = (attr) => (attr ? this._data[i > 0 ? i - 1 : 0][attr] : this._data[i > 0 ? i - 1 : 0]);
this.fire("elepoint_init", { point: point, props: props, id: i, isMulti: nestingLevel });
this._addPoint(
point.lat ?? point[1],
point.lng ?? point[0],
point.alt ?? point.meta.ele ?? point[2]
);
this.fire("elepoint_added", { point: point, index: this._data.length - 1 });
if (this._yCoordMax < this._data[this._data.length - 1][this.options.yAttr]) this._yCoordMax = this._data[this._data.length - 1][this.options.yAttr];
});
this.fire("eletrack_added", { coords: coords, index: this._data.length - 1 });
},
/*
* Parse and push a single (x, y, z) point to current elevation profile.
*/
_addPoint: function(x, y, z) {
if (this.options.reverseCoords) {
[x, y] = [y, x];
}
this._data.push({
x: x,
y: y,
z: z,
latlng: L.latLng(x, y, z)
});
this.fire("eledata_updated", { index: this._data.length - 1 });
},
_addLayer: function(layer) {
if (layer) this._layers.addLayer(layer)
// Postpone adding the distance markers (lazy: true)
if (layer && this.options.distanceMarkers && this.options.distanceMarkers.lazy) {
layer.on('add remove', ({target, type}) => L.DistanceMarkers && target instanceof L.Polyline && target[type + 'DistanceMarkers']());
}
return layer;
},
_addMarker: function(marker) {
if (marker) this._markers.addLayer(marker)
return marker;
},
/**
* Initialize "L.AlmostOver" integration
*/
_initAlmostOverHandler: function(map, layer) {
return (map && this.options.almostOver && !L.Browser.mobile) ? Promise.all([
this.import(this.__LGEOMUTIL),
this.import(this.__LALMOSTOVER)
]).then(() => {
map.addHandler('almostOver', L.Handler.AlmostOver)
if (L.GeometryUtil && map.almostOver && map.almostOver.enabled()) {
map.almostOver.addLayer(layer);
map
.on('almost:move', (e) => this._onMouseMoveLayer(e))
.on('almost:out', (e) => this._onMouseOut(e));
}
}) : Promise.resolve();
},
/**
* Initialize "L.DistanceMarkers" integration
*/
_initDistanceMarkers: function() {
return this.options.distanceMarkers ? Promise.all([this.import(this.__LGEOMUTIL), this.import(this.__LDISTANCEM)]) : Promise.resolve();
},
_initHotLine: function(layer) {
let prop = typeof this.options.hotline == 'string' ? this.options.hotline : 'elevation';
return this.options.hotline ? this.import(this.__LHOTLINE)
.then(() => {
layer.eachLayer((trkseg) => {
if(trkseg.feature.geometry.type != "Point") {
let geo = L.geoJson(trkseg.toGeoJSON(), { coordsToLatLng: (coords) => L.latLng(coords[0], coords[1], coords[2] * (this.options.altitudeFactor || 1))});
let line = L.hotline(geo.toGeoJSON().features[0].geometry.coordinates, {
renderer: L.Hotline.renderer(),
min: isFinite(this.track_info[prop + '_min']) ? this.track_info[prop + '_min'] : 0,
max: isFinite(this.track_info[prop + '_max']) ? this.track_info[prop + '_max'] : 1,
palette: {
0.0: '#008800',
0.5: '#ffff00',
1.0: '#ff0000'
},
weight: 5,
outlineColor: '#000000',
outlineWidth: 1
}).addTo(this._hotline);
let alpha = trkseg.options.style && trkseg.options.style.opacity || 1;
trkseg.on('add remove', ({type}) => {
trkseg.setStyle({opacity: (type == 'add' ? 0 : alpha)});
line[(type == 'add' ? 'addTo' : 'removeFrom')](trkseg._map);
if (line._renderer) line._renderer._container.parentElement.insertBefore(line._renderer._container, line._renderer._container.parentElement.firstChild);
});
}
});
}) : Promise.resolve();
},
/**
* Initialize "L.AlmostOver" and "L.DistanceMarkers"
*/
_initMapIntegrations: function(layer) {
let map = this._map;
if (map) {
if (this._data.length) {
this._start.setLatLng(this._data[0].latlng);
this._end.setLatLng(this._data[this._data.length -1].latlng);
}
Promise.all([
this._initHotLine(layer),
this._initAlmostOverHandler(map, layer),
this._initDistanceMarkers(),
]).then(() => {
if (this.options.polyline) {
layer.addTo(map);
this._circleMarkers.addTo(map);
}
if (this.options.autofitBounds) {
this.fitBounds(layer.getBounds());
}
map.invalidateSize();
});
} else {
this.once('add', () => this._initMapIntegrations(layer));
}
},
/*
* Collapse current chart control.
*/
_collapse: function() {
_.replaceClass(this._container, 'elevation-expanded', 'elevation-collapsed');
if (this._map) this._map.invalidateSize();
},
/*
* Expand current chart control.
*/
_expand: function() {
_.replaceClass(this._container, 'elevation-collapsed', 'elevation-expanded');
if (this._map) this._map.invalidateSize();
},
/**
* Add some basic colors to leaflet canvas renderer (preferCanvas: true).
*/
_fixCanvasPaths: function() {
let oldProto = L.Canvas.prototype._fillStroke;
let control = this;
let theme = this.options.theme.split(' ')[0].replace('-theme', '');
let color = _.Colors[theme] || {};
L.Canvas.include({
_fillStroke: function(ctx, layer) {
if (control._layers.hasLayer(layer)) {
let options = layer.options;
options.color = color.line || color.area || theme;
options.stroke = !!options.color;
oldProto.call(this, ctx, layer);
if (options.stroke && options.weight !== 0) {
let oldVal = ctx.globalCompositeOperation || 'source-over';
ctx.globalCompositeOperation = 'destination-over'
ctx.strokeStyle = color.outline || '#FFF';
ctx.lineWidth = options.weight * 1.75;
ctx.stroke();
ctx.globalCompositeOperation = oldVal;
}
} else {
oldProto.call(this, ctx, layer);
}
}
});
},
/**
* Partial fix for initial tooltip size
*
* @link https://github.com/Raruto/leaflet-elevation/issues/81#issuecomment-713477050
*/
_fixTooltipSize: function() {
this.on('elechart_init', () =>
this.once('elechart_change elechart_hover', ({data, xCoord}) => {
if (this._chartEnabled) {
this._chart._showDiagramIndicator(data, xCoord);
this._chart._showDiagramIndicator(data, xCoord);
}
this._updateMarker(data);
})
);
},
/*
* Finds a data entry for the given LatLng
*/
_findItemForLatLng: function(latlng) {
return this._data[this._chart._findIndexForLatLng(latlng)];
},
/*
* Finds a data entry for the given xDiagCoord
*/
_findItemForX: function(x) {
return this._data[this._chart._findIndexForXCoord(x)];
},
/**
* Fires an event of the specified type.
*/
_fireEvt: function(type, data, propagate) {
if (this.fire) this.fire(type, data, propagate);
if (this._map) this._map.fire(type, data, propagate);
},
/*
* Hides the position/height indicator marker drawn onto the map
*/
_hideMarker: function() {
if (this.options.autohideMarker) {
this._marker.remove();
}
},
/**
* Generate "svg" chart (DOM element).
*/
_initChart: function(container) {
let opts = this.options;
let map = this._map;
if (opts.detached) {
let { offsetWidth, offsetHeight} = this.eleDiv;
if (offsetWidth > 0) opts.width = offsetWidth;
if (offsetHeight > 20) opts.height = offsetHeight - 20; // 20 = horizontal scrollbar size.
} else {
let { clientWidth } = map.getContainer();
opts._maxWidth = opts._maxWidth > opts.width ? opts._maxWidth : opts.width;
this._container.style.maxWidth = opts._maxWidth + 'px';
if (opts._maxWidth > clientWidth) opts.width = clientWidth - 30;
}
Promise.all([
this.import(this.__D3),
this.import(this.__LCHART)
]).then((m) => {
let chart = this._chart = new (m[1] || Elevation).Chart(opts, this);
this._x = this._chart._x;
this._y = this._chart._y;
d3
.select(container)
.call(chart.render())
chart
.on('reset_drag', this._hideMarker, this)
.on('mouse_enter', this._onMouseEnter, this)
.on('dragged', this._onDragEnd, this)
.on('mouse_move', this._onMouseMove, this)
.on('mouse_out', this._onMouseOut, this)
.on('ruler_filter', this._onRulerFilter, this)
.on('zoom', this._updateChart, this)
.on('elepath_toggle', this._onToggleChart, this)
.on('margins_updated', this._resizeChart, this);
this.fire("elechart_init");
map
.on('zoom viewreset zoomanim', this._hideMarker, this)
.on('resize', this._resetView, this)
.on('resize', this._resizeChart, this)
.on('rotate', this._rotateMarker, this)
.on('mousedown', this._resetDrag, this);
_.on(map.getContainer(), 'mousewheel', this._resetDrag, this);
_.on(map.getContainer(), 'touchstart', this._resetDrag, this);
_.on(document, 'keydown', this._onKeyDown, this);
this
.on('eledata_added eledata_loaded', this._updateChart, this)
.on('eledata_added eledata_loaded', this._updateSummary, this);
this._updateChart();
this._updateSummary();
});
},
_initLayer: function() {
this._layers
.on('layeradd layerremove', ({layer, type}) => {
let node = layer.getElement && layer.getElement();
_.toggleClass(node, this.options.polyline.className + ' ' + this.options.theme, type == 'layeradd');
_.toggleEvent(layer, "mousemove", this._onMouseMoveLayer.bind(this), type == 'layeradd')
_.toggleEvent(layer, "mouseout", this._onMouseOut.bind(this), type == 'layeradd');
});
},
_initMarker: function(map) {
let pane = map.getPane('elevationPane');
if (!pane) {
pane = this._pane = map.createPane('elevationPane', map.getPane('norotatePane') || map.getPane('mapPane'));
pane.style.zIndex = 625; // This pane is above markers but below popups.
pane.style.pointerEvents = 'none';
}
if (this._renderer) this._renderer.remove()
this._renderer = L.svg({ pane: "elevationPane" }).addTo(this._map); // default leaflet svg renderer
Promise.all([
this.import(this.__D3),
this.import(this.__LMARKER)
]).then((m) => {
this._marker = new (m[1] || Elevation).Marker(this.options, this);
this.fire("elechart_marker");
});
},
/**
* Inspired by L.Control.Layers
*/
_initButton: function(container) {
L.DomEvent
.disableClickPropagation(container)
.disableScrollPropagation(container);
this.options.collapsed ? this._collapse() : this._expand();
if (this.options.autohide) {
_.on(container, 'mouseover', this._expand, this);
_.on(container, 'mouseout', this._collapse, this);
this._map.on('click', this._collapse, this);
}
if (this.options.closeBtn) {
let link = this._button = _.create('a', "elevation-toggle-icon", { href: '#', title: L._('Elevation'), }, container);
_.on(link, 'click', L.DomEvent.stop);
_.on(link, 'click', this._toggle, this);
_.on(link, 'focus', this._toggle, this);
fetch(this.__btnIcon).then(r => r.ok && r.text().then(img => link.innerHTML = img));
}
},
_initSummary: function(container) {
this.import(this.__LSUMMARY).then((m)=>{
this._summary = new (m || Elevation).Summary({ summary: this.options.summary }, this);
this.on('elechart_init', () => {
d3.select(container).call(this._summary.render());
});
});
},
/**
* Retrieve data from a remote url (HTTP).
*/
_loadFile: function(url) {
fetch(url)
.then((response) => response.text())
.then((data) => {
this._downloadURL = url; // TODO: handle multiple urls?
this._parseFromString(data)
.then( geojson => geojson && this._loadLayer(geojson));
}).catch((err) => console.warn(err));
},
/**
* Dynamically import only required javascript modules (code splitting)
*/
_loadModules: function(handlers) {
// First map known classnames (eg. "Altitude" --> L.Control.Elevation.Altitude)
handlers = handlers.map((h) => typeof h === 'string' && typeof Elevation[h] !== "undefined" ? Elevation[h] : h);
// Then load optional classes and custom imports (eg. "Cadence" --> import('../src/handlers/cadence.js'))
let modules = handlers.map(file => (typeof file === 'string' && this.import(this.__modulesFolder + file.toLowerCase() + '.js')) || (file instanceof Promise && file) || Promise.resolve());
return Promise.all(modules).then((m) => {
_.each(m, (exported, i) => {
let fn = exported && Object.keys(exported)[0];
if (fn) {
handlers[i] = Elevation[fn] = (Elevation[fn] ?? exported[fn]);
}
});
_.each(handlers, h => ["function", "object"].includes(typeof h) && this._registerHandler(h));
});
},
/**
* Simple GeoJSON data loader (L.GeoJSON).
*/
_loadLayer: function(geojson) {
let { polyline, theme, waypoints, wptIcons, wptLabels, distanceMarkers } = this.options;
let style = L.extend({}, polyline);
if (theme) {
style.className += ' ' + theme;
}
if (geojson.name) {
this.track_info.name = geojson.name;
}
let layer = L.geoJson(geojson, {
distanceMarkers: distanceMarkers,
style: style,
pointToLayer: (feature, latlng) => {
if (waypoints) {
let { desc, name, sym } = feature.properties;
desc = desc || '';
name = name || '';
// Handle chart waypoints (dots)
if ([true, 'dots'].includes(waypoints)) {
this._registerCheckPoint({
latlng: latlng,
label : ([true, 'dots'].includes(wptLabels) ? name : '')
});
}
// Handle map waypoints (markers)
if ([true, 'markers'].includes(waypoints) && wptIcons != false) {
return this._registerMarker({
latlng : latlng,
sym : (sym ?? name).replace(' ', '-').replace('"', '').replace("'", '').toLowerCase(),
content: [true, 'markers'].includes(wptLabels) && (name || desc) && decodeURI("<b>" + name + "</b>" + (desc.length > 0 ? '<br>' + desc : ''))
});
}
}
},
onEachFeature: (feature, layer) => feature.geometry && feature.geometry.type != 'Point' && this.addData(feature, layer),
});
this.import(this.__D3).then(() => {
this._initMapIntegrations(layer);
this._fireEvt("eledata_loaded", { data: geojson, layer: layer, name: this.track_info.name, track_info: this.track_info });
});
return layer;
},
_onDragEnd: function({ dragstart, dragend}) {
this._hideMarker();
this.fitBounds(L.latLngBounds([dragstart.latlng, dragend.latlng]));
this.fire("elechart_dragged");
},
_onKeyDown: function({key}) {
if(!this.options.detached && key === "Escape"){
this._collapse()
};
},
/**
* Trigger mouseenter event.
*/
_onMouseEnter: function() {
this.fire('elechart_enter');
},
/*
* Handles the moueseover the chart and displays distance and altitude level.
*/
_onMouseMove: function({xCoord}) {
if (this._chartEnabled && this._data.length) {
let item = this._findItemForX(xCoord);
if (item) {
if (this._chartEnabled) this._chart._showDiagramIndicator(item, xCoord);
this._updateMarker(item);
this._setMapView(item);
if (this._map) {
_.addClass(this._map.getContainer(), 'elechart-hover');
}
this.fire("elechart_change", { data: item, xCoord: xCoord });
this.fire("elechart_hover", { data: item, xCoord: xCoord });
}
}
},
/*
* Handles mouseover events of the data layers on the map.
*/
_onMouseMoveLayer: function({latlng}) {
if (this._data.length) {
let item = this._findItemForLatLng(latlng);
if (item) {
let xCoord = item.xDiagCoord;
if (this._chartEnabled) this._chart._showDiagramIndicator(item, xCoord);
this._updateMarker(item);
this.fire("elechart_change", { data: item, xCoord: xCoord });
}
}
},
/*
* Handles the moueseout over the chart.
*/
_onMouseOut: function() {
if (!this.options.detached) {
this._hideMarker();
this._chart._hideDiagramIndicator();
}
if (this._map) {
_.removeClass(this._map.getContainer(), 'elechart-hover');
}
this.fire("elechart_leave");
},
/**
* Handles the drag event over the ruler filter.
*/
_onRulerFilter: function({coords}) {
this._updateMapSegments(coords);
},
/**
* Toggle chart data on legend click
*/
_onToggleChart: function({ name, enabled }) {
this._chartEnabled = this._chart._hasActiveLayers();
// toggle layer visibility on empty chart
this._layers.eachLayer(layer => _.toggleClass(layer.getElement && layer.getElement(), this.options.polyline.className + ' ' + this.options.theme, this._chartEnabled));
// toggle option value (eg. altitude = { 'disabled' || 'enabled' })
this.options[name] = !enabled && this.options[name] == 'disabled' ? 'enabled' : 'disabled';
// remove marker on empty chart
if (!this._chartEnabled) {
this._chart._hideDiagramIndicator();
this._marker.remove();
}
},
/**
* Simple GeoJSON Parser
*/
_parseFromGeoJSONString: function(data) {
try {
return JSON.parse(data);
} catch (e) { }
},
/**
* Attempt to parse raw response data (GeoJSON or XML > GeoJSON)
*/
_parseFromString: function(data) {
return new Promise(resolve =>
this.import(this.__TOGEOJSON).then(() => {
let geojson;
try {
geojson = this._parseFromXMLString(data.trim());
} catch (e) {
geojson = this._parseFromGeoJSONString(data.toString());
}
if (geojson) {
geojson.name = geojson.name || (this._downloadURL || '').split('/').pop().split('#')[0].split('?')[0];
}
resolve(geojson);
})
);
},
/**
* Simple XML Parser (GPX, KML, TCX)
*/
_parseFromXMLString: function(data) {
if (data.indexOf("<") != 0) {
throw 'Invalid XML';
}
let xml = (new DOMParser()).parseFromString(data, "text/xml");
let type = xml.documentElement.tagName.toLowerCase(); // "kml" or "gpx"
let name = xml.getElementsByTagName('name');
if (xml.getElementsByTagName('parsererror').length) {
throw 'Invalid XML';
}
if (!(type in toGeoJSON)) {
type = xml.documentElement.tagName == "TrainingCenterDatabase" ? 'tcx' : 'gpx';
}
let geojson = toGeoJSON[type](xml);
geojson.name = name.length > 0 ? (Array.from(name).find(tag => tag.parentElement.tagName == "trk") ?? name[0]).textContent : '';
return geojson;
},
/**
* Add chart profile to diagram
*/
_registerAreaPath: function(props) {
this.on("elechart_init", () => this._chart._registerAreaPath(props));
},
/**
* Add chart grid to diagram
*/
_registerAxisGrid: function(props) {
this.on("elechart_axis", () => this._chart._registerAxisGrid(props));
},
/**
* Add chart axis to diagram
*/
_registerAxisScale: function(props) {
this.on("elechart_axis", () => this._chart._registerAxisScale(props));
},
/**
* Add a point of interest over the diagram
*/
_registerCheckPoint: function(props) {
this.on("elechart_updated", () => this._chart._registerCheckPoint(props));
},
/**
* Base handler for iterative track statistics (dist, time, z, slope, speed, acceleration, ...)
*/
_registerDataAttribute: function(props) {
// parse of "coordinateProperties" for later usage
if (props.coordPropsToMeta) {
this.on("elepoint_init", (e) => props.coordPropsToMeta.call(this, e));
}
// prevent excessive variabile instanstations
let i, curr, prev, attr = props.attr || props.name;
// save here a reference to last used point
let lastValid = {};
// iteration
this.on("elepoint_added", ({index, point}) => {
i = index;