/* * @Author: hisense.fanchunxiang * @Date: 2021-12-15 17:28:49 * @LastEditors: hisense.fanchunxiang * @LastEditTime: 2021-12-16 09:42:28 * @Description: file content */ /* (c) 2014, Vladimir Agafonkin simpleheat, a tiny JavaScript library for drawing heatmaps with Canvas https://github.com/mourner/simpleheat */ !(function () { 'use strict' function t(i) { return this instanceof t ? ((this._canvas = i = 'string' == typeof i ? document.getElementById(i) : i), (this._ctx = i.getContext('2d')), (this._width = i.width), (this._height = i.height), (this._max = 1), void this.clear()) : new t(i) } ;(t.prototype = { defaultRadius: 25, defaultGradient: { 0.4: 'blue', 0.6: 'cyan', 0.7: 'lime', 0.8: 'yellow', 1: 'red', }, data: function (t, i) { return (this._data = t), this }, max: function (t) { return (this._max = t), this }, add: function (t) { return this._data.push(t), this }, clear: function () { return (this._data = []), this }, radius: function (t, i) { i = i || 15 var a = (this._circle = document.createElement('canvas')), s = a.getContext('2d'), e = (this._r = t + i) return ( (a.width = a.height = 2 * e), (s.shadowOffsetX = s.shadowOffsetY = 200), (s.shadowBlur = i), (s.shadowColor = 'black'), s.beginPath(), s.arc(e - 200, e - 200, t, 0, 2 * Math.PI, !0), s.closePath(), s.fill(), this ) }, gradient: function (t) { var i = document.createElement('canvas'), a = i.getContext('2d'), s = a.createLinearGradient(0, 0, 0, 256) ;(i.width = 1), (i.height = 256) for (var e in t) s.addColorStop(e, t[e]) return ( (a.fillStyle = s), a.fillRect(0, 0, 1, 256), (this._grad = a.getImageData(0, 0, 1, 256).data), this ) }, draw: function (t) { this._circle || this.radius(this.defaultRadius), this._grad || this.gradient(this.defaultGradient) var i = this._ctx i.clearRect(0, 0, this._width, this._height) for (var a, s = 0, e = this._data.length; e > s; s++) (a = this._data[s]), (i.globalAlpha = Math.max(a[2] / this._max, t || 0.05)), i.drawImage(this._circle, a[0] - this._r, a[1] - this._r) var n = i.getImageData(0, 0, this._width, this._height) return this._colorize(n.data, this._grad), i.putImageData(n, 0, 0), this }, _colorize: function (t, i) { for (var a, s = 3, e = t.length; e > s; s += 4) (a = 4 * t[s]), a && ((t[s - 3] = i[a]), (t[s - 2] = i[a + 1]), (t[s - 1] = i[a + 2])) }, }), (window.simpleheat = t) })() /* (c) 2014, Vladimir Agafonkin Leaflet.heat, a tiny and fast heatmap plugin for Leaflet. https://github.com/Leaflet/Leaflet.heat */, (L.HeatLayer = (L.Layer ? L.Layer : L.Class).extend({ initialize: function (t, i) { ;(this._latlngs = t), L.setOptions(this, i) }, setLatLngs: function (t) { return (this._latlngs = t), this.redraw() }, addLatLng: function (t) { return this._latlngs.push(t), this.redraw() }, setOptions: function (t) { return ( L.setOptions(this, t), this._heat && this._updateOptions(), this.redraw() ) }, redraw: function () { return ( !this._heat || this._frame || this._map._animating || (this._frame = L.Util.requestAnimFrame(this._redraw, this)), this ) }, onAdd: function (t) { ;(this._map = t), this._canvas || this._initCanvas(), t._panes.overlayPane.appendChild(this._canvas), t.on('moveend', this._reset, this), t.options.zoomAnimation && L.Browser.any3d && t.on('zoomanim', this._animateZoom, this), this._reset() }, onRemove: function (t) { t.getPanes().overlayPane.removeChild(this._canvas), t.off('moveend', this._reset, this), t.options.zoomAnimation && t.off('zoomanim', this._animateZoom, this) }, addTo: function (t) { return t.addLayer(this), this }, _initCanvas: function () { var t = (this._canvas = L.DomUtil.create( 'canvas', 'leaflet-heatmap-layer leaflet-layer' )), i = L.DomUtil.testProp([ 'transformOrigin', 'WebkitTransformOrigin', 'msTransformOrigin', ]) t.style[i] = '50% 50%' var a = this._map.getSize() ;(t.width = a.x), (t.height = a.y) var s = this._map.options.zoomAnimation && L.Browser.any3d L.DomUtil.addClass(t, 'leaflet-zoom-' + (s ? 'animated' : 'hide')), (this._heat = simpleheat(t)), this._updateOptions() }, _updateOptions: function () { this._heat.radius( this.options.radius || this._heat.defaultRadius, this.options.blur ), this.options.gradient && this._heat.gradient(this.options.gradient), this.options.max && this._heat.max(this.options.max) }, _reset: function () { var t = this._map.containerPointToLayerPoint([0, 0]) L.DomUtil.setPosition(this._canvas, t) var i = this._map.getSize() this._heat._width !== i.x && (this._canvas.width = this._heat._width = i.x), this._heat._height !== i.y && (this._canvas.height = this._heat._height = i.y), this._redraw() }, _redraw: function () { var t, i, a, s, e, n, h, o, r, d = [], _ = this._heat._r, l = this._map.getSize(), m = new L.Bounds(L.point([-_, -_]), l.add([_, _])), c = void 0 === this.options.max ? 1 : this.options.max, u = void 0 === this.options.maxZoom ? this._map.getMaxZoom() : this.options.maxZoom, f = 1 / Math.pow(2, Math.max(0, Math.min(u - this._map.getZoom(), 12))), g = _ / 2, p = [], v = this._map._getMapPanePos(), w = v.x % g, y = v.y % g for (t = 0, i = this._latlngs.length; i > t; t++) if ( ((a = this._map.latLngToContainerPoint(this._latlngs[t])), m.contains(a)) ) { ;(e = Math.floor((a.x - w) / g) + 2), (n = Math.floor((a.y - y) / g) + 2) var x = void 0 !== this._latlngs[t].alt ? this._latlngs[t].alt : void 0 !== this._latlngs[t][2] ? +this._latlngs[t][2] : 1 ;(r = x * f), (p[n] = p[n] || []), (s = p[n][e]), s ? ((s[0] = (s[0] * s[2] + a.x * r) / (s[2] + r)), (s[1] = (s[1] * s[2] + a.y * r) / (s[2] + r)), (s[2] += r)) : (p[n][e] = [a.x, a.y, r]) } for (t = 0, i = p.length; i > t; t++) if (p[t]) for (h = 0, o = p[t].length; o > h; h++) (s = p[t][h]), s && d.push([Math.round(s[0]), Math.round(s[1]), Math.min(s[2], c)]) this._heat.data(d).draw(this.options.minOpacity), (this._frame = null) }, _animateZoom: function (t) { var i = this._map.getZoomScale(t.zoom), a = this._map ._getCenterOffset(t.center) ._multiplyBy(-i) .subtract(this._map._getMapPanePos()) L.DomUtil.setTransform ? L.DomUtil.setTransform(this._canvas, a, i) : (this._canvas.style[L.DomUtil.TRANSFORM] = L.DomUtil.getTranslateString(a) + ' scale(' + i + ')') }, })), (L.heatLayer = function (t, i) { return new L.HeatLayer(t, i) })