'use strict'
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import Rbush from 'rbush'
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function init (L) {
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var CanvasIconLayer = (L.Layer ? L.Layer : L.Class).extend({
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// Add event listeners to initialized section.
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initialize: function (options) {
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L.setOptions(this, options)
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this._onClickListeners = []
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this._onHoverListeners = []
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},
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setOptions: function (options) {
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L.setOptions(this, options)
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return this.redraw()
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},
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redraw: function () {
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this._redraw(true)
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},
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// Multiple layers at a time for rBush performance
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addMarkers: function (markers) {
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var self = this
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var tmpMark = []
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var tmpLatLng = []
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markers.forEach(function (marker) {
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if (!((marker.options.pane === 'markerPane') && marker.options.icon)) {
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console.error('Layer isn\'t a marker')
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return
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}
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var latlng = marker.getLatLng()
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var isDisplaying = self._map.getBounds().contains(latlng)
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var s = self._addMarker(marker, latlng, isDisplaying)
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// Only add to Point Lookup if we are on map
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if (isDisplaying === true) tmpMark.push(s[0])
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tmpLatLng.push(s[1])
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})
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self._markers.load(tmpMark)
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self._latlngMarkers.load(tmpLatLng)
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},
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// Adds single layer at a time. Less efficient for rBush
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addMarker: function (marker) {
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var self = this
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var latlng = marker.getLatLng()
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var isDisplaying = self._map.getBounds().contains(latlng)
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var dat = self._addMarker(marker, latlng, isDisplaying)
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// Only add to Point Lookup if we are on map
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if (isDisplaying === true) self._markers.insert(dat[0])
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self._latlngMarkers.insert(dat[1])
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},
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addLayer: function (layer) {
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if ((layer.options.pane === 'markerPane') && layer.options.icon) this.addMarker(layer)
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else console.error('Layer isn\'t a marker')
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},
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addLayers: function (layers) {
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this.addMarkers(layers)
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},
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removeLayer: function (layer) {
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this.removeMarker(layer, true)
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},
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removeMarker: function (marker, redraw) {
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var self = this
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// If we are removed point
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if (marker.minX) marker = marker.data
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var latlng = marker.getLatLng()
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var isDisplaying = self._map.getBounds().contains(latlng)
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var markerData = {
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minX: latlng.lng,
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minY: latlng.lat,
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maxX: latlng.lng,
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maxY: latlng.lat,
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data: marker
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}
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self._latlngMarkers.remove(markerData, function (a, b) {
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return a.data._leaflet_id === b.data._leaflet_id
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})
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self._latlngMarkers.total--
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self._latlngMarkers.dirty++
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if (isDisplaying === true && redraw === true) {
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self._redraw(true)
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}
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},
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onAdd: function (map) {
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this._map = map
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if (!this._canvas) this._initCanvas()
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if (this.options.pane) this.getPane().appendChild(this._canvas)
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else map._panes.overlayPane.appendChild(this._canvas)
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map.on('moveend', this._reset, this)
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map.on('resize', this._reset, this)
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map.on('click', this._executeListeners, this)
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map.on('mousemove', this._executeListeners, this)
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map.on('zoomstart', this._canvasHide, this)
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map.on('zoomend', this._canvasShow, this)
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},
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onRemove: function (map) {
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if (this.options.pane) this.getPane().removeChild(this._canvas)
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else map.getPanes().overlayPane.removeChild(this._canvas)
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map.off('click', this._executeListeners, this)
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map.off('mousemove', this._executeListeners, this)
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map.off('moveend', this._reset, this)
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map.off('resize', this._reset, this)
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map.off('zoomstart', this._canvasHide, this)
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map.off('zoomend', this._canvasShow, this)
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},
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addTo: function (map) {
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map.addLayer(this)
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return this
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},
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clearLayers: function () {
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this._latlngMarkers = null
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this._markers = null
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this._redraw(true)
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},
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_canvasHide: function () {
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this._canvas.style.visibility = 'hidden'
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},
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_canvasShow: function () {
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this._canvas.style.visibility = 'visible'
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},
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_addMarker: function (marker, latlng, isDisplaying) {
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var self = this
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// Needed for pop-up & tooltip to work.
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marker._map = self._map
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// _markers contains Points of markers currently displaying on map
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if (!self._markers) self._markers = new Rbush()
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// _latlngMarkers contains Lat\Long coordinates of all markers in layer.
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if (!self._latlngMarkers) {
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self._latlngMarkers = new Rbush()
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self._latlngMarkers.dirty = 0
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self._latlngMarkers.total = 0
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}
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L.Util.stamp(marker)
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var pointPos = self._map.latLngToContainerPoint(latlng)
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var iconSize = marker.options.icon.options.iconSize
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var adjX = iconSize[0] / 2
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var adjY = iconSize[1] / 2
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var ret = [({
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minX: (pointPos.x - adjX),
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minY: (pointPos.y - adjY),
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maxX: (pointPos.x + adjX),
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maxY: (pointPos.y + adjY),
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data: marker
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}), ({
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minX: latlng.lng,
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minY: latlng.lat,
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maxX: latlng.lng,
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maxY: latlng.lat,
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data: marker
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})]
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self._latlngMarkers.dirty++
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self._latlngMarkers.total++
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// Only draw if we are on map
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if (isDisplaying === true) self._drawMarker(marker, pointPos)
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return ret
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},
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_drawMarker: function (marker, pointPos) {
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var self = this
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if (!this._imageLookup) this._imageLookup = {}
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if (!pointPos) {
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pointPos = self._map.latLngToContainerPoint(marker.getLatLng())
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}
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var iconUrl = marker.options.icon.options.iconUrl
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if (marker.canvas_img) {
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self._drawImage(marker, pointPos)
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} else {
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if (self._imageLookup[iconUrl]) {
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marker.canvas_img = self._imageLookup[iconUrl][0]
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if (self._imageLookup[iconUrl][1] === false) {
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self._imageLookup[iconUrl][2].push([marker, pointPos])
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} else {
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self._drawImage(marker, pointPos)
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}
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} else {
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var i = new Image()
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i.src = iconUrl
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marker.canvas_img = i
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// Image,isLoaded,marker\pointPos ref
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self._imageLookup[iconUrl] = [i, false, [[marker, pointPos]]]
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i.onload = function () {
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self._imageLookup[iconUrl][1] = true
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self._imageLookup[iconUrl][2].forEach(function (e) {
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self._drawImage(e[0], e[1])
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})
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}
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}
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}
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},
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_drawImage: function (marker, pointPos) {
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var options = marker.options.icon.options
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this._context.drawImage(
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marker.canvas_img,
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pointPos.x - options.iconAnchor[0],
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pointPos.y - options.iconAnchor[1],
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options.iconSize[0],
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options.iconSize[1]
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)
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},
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_reset: function () {
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var topLeft = this._map.containerPointToLayerPoint([0, 0])
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L.DomUtil.setPosition(this._canvas, topLeft)
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var size = this._map.getSize()
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this._canvas.width = size.x
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this._canvas.height = size.y
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this._redraw()
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},
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_redraw: function (clear) {
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var self = this
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if (clear) this._context.clearRect(0, 0, this._canvas.width, this._canvas.height)
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if (!this._map || !this._latlngMarkers) return
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var tmp = []
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// If we are 10% individual inserts\removals, reconstruct lookup for efficiency
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if (self._latlngMarkers.dirty / self._latlngMarkers.total >= 0.1) {
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self._latlngMarkers.all().forEach(function (e) {
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tmp.push(e)
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})
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self._latlngMarkers.clear()
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self._latlngMarkers.load(tmp)
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self._latlngMarkers.dirty = 0
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tmp = []
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}
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var mapBounds = self._map.getBounds()
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// Only re-draw what we are showing on the map.
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var mapBoxCoords = {
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minX: mapBounds.getWest(),
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minY: mapBounds.getSouth(),
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maxX: mapBounds.getEast(),
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maxY: mapBounds.getNorth()
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}
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self._latlngMarkers.search(mapBoxCoords).forEach(function (e) {
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// Readjust Point Map
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var pointPos = self._map.latLngToContainerPoint(e.data.getLatLng())
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var iconSize = e.data.options.icon.options.iconSize
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var adjX = iconSize[0] / 2
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var adjY = iconSize[1] / 2
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var newCoords = {
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minX: (pointPos.x - adjX),
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minY: (pointPos.y - adjY),
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maxX: (pointPos.x + adjX),
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maxY: (pointPos.y + adjY),
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data: e.data
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}
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tmp.push(newCoords)
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// Redraw points
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self._drawMarker(e.data, pointPos)
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})
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// Clear rBush & Bulk Load for performance
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this._markers.clear()
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this._markers.load(tmp)
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},
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_initCanvas: function () {
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this._canvas = L.DomUtil.create('canvas', 'leaflet-canvas-icon-layer leaflet-layer')
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var originProp = L.DomUtil.testProp(['transformOrigin', 'WebkitTransformOrigin', 'msTransformOrigin'])
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this._canvas.style[originProp] = '50% 50%'
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var size = this._map.getSize()
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this._canvas.width = size.x
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this._canvas.height = size.y
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this._context = this._canvas.getContext('2d')
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var animated = this._map.options.zoomAnimation && L.Browser.any3d
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L.DomUtil.addClass(this._canvas, 'leaflet-zoom-' + (animated ? 'animated' : 'hide'))
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},
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addOnClickListener: function (listener) {
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this._onClickListeners.push(listener)
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},
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addOnHoverListener: function (listener) {
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this._onHoverListeners.push(listener)
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},
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_executeListeners: function (event) {
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if (!this._markers) return
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var me = this
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var x = event.containerPoint.x
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var y = event.containerPoint.y
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if (me._openToolTip) {
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me._openToolTip.closeTooltip()
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delete me._openToolTip
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}
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var ret = this._markers.search({ minX: x, minY: y, maxX: x, maxY: y })
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if (ret && ret.length > 0) {
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me._map._container.style.cursor = 'pointer'
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if (event.type === 'click') {
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var hasPopup = ret[0].data.getPopup()
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if (hasPopup) ret[0].data.openPopup()
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me._onClickListeners.forEach(function (listener) { listener(event, ret) })
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}
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if (event.type === 'mousemove') {
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var hasTooltip = ret[0].data.getTooltip()
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if (hasTooltip) {
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me._openToolTip = ret[0].data
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ret[0].data.openTooltip()
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}
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me._onHoverListeners.forEach(function (listener) { listener(event, ret) })
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}
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} else {
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me._map._container.style.cursor = ''
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}
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}
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})
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L.canvasIconLayer = function (options) {
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return new CanvasIconLayer(options)
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}
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}
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export default {
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init
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}
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