--- /dev/null
+/*
+ * Leaflet.markercluster 1.4.1+master.37ab9a2,
+ * Provides Beautiful Animated Marker Clustering functionality for Leaflet, a JS library for interactive maps.
+ * https://github.com/Leaflet/Leaflet.markercluster
+ * (c) 2012-2017, Dave Leaver, smartrak
+ */
+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+ typeof define === 'function' && define.amd ? define(['exports'], factory) :
+ (factory((global.Leaflet = global.Leaflet || {}, global.Leaflet.markercluster = global.Leaflet.markercluster || {})));
+}(this, (function (exports) { 'use strict';
+
+/*
+ * L.MarkerClusterGroup extends L.FeatureGroup by clustering the markers contained within
+ */
+
+var MarkerClusterGroup = L.MarkerClusterGroup = L.FeatureGroup.extend({
+
+ options: {
+ maxClusterRadius: 80, //A cluster will cover at most this many pixels from its center
+ iconCreateFunction: null,
+ clusterPane: L.Marker.prototype.options.pane,
+
+ spiderfyOnMaxZoom: true,
+ showCoverageOnHover: true,
+ zoomToBoundsOnClick: true,
+ singleMarkerMode: false,
+
+ disableClusteringAtZoom: null,
+
+ // Setting this to false prevents the removal of any clusters outside of the viewpoint, which
+ // is the default behaviour for performance reasons.
+ removeOutsideVisibleBounds: true,
+
+ // Set to false to disable all animations (zoom and spiderfy).
+ // If false, option animateAddingMarkers below has no effect.
+ // If L.DomUtil.TRANSITION is falsy, this option has no effect.
+ animate: true,
+
+ //Whether to animate adding markers after adding the MarkerClusterGroup to the map
+ // If you are adding individual markers set to true, if adding bulk markers leave false for massive performance gains.
+ animateAddingMarkers: false,
+
+ //Increase to increase the distance away that spiderfied markers appear from the center
+ spiderfyDistanceMultiplier: 1,
+
+ // Make it possible to specify a polyline options on a spider leg
+ spiderLegPolylineOptions: { weight: 1.5, color: '#222', opacity: 0.5 },
+
+ // When bulk adding layers, adds markers in chunks. Means addLayers may not add all the layers in the call, others will be loaded during setTimeouts
+ chunkedLoading: false,
+ chunkInterval: 200, // process markers for a maximum of ~ n milliseconds (then trigger the chunkProgress callback)
+ chunkDelay: 50, // at the end of each interval, give n milliseconds back to system/browser
+ chunkProgress: null, // progress callback: function(processed, total, elapsed) (e.g. for a progress indicator)
+
+ //Options to pass to the L.Polygon constructor
+ polygonOptions: {}
+ },
+
+ initialize: function (options) {
+ L.Util.setOptions(this, options);
+ if (!this.options.iconCreateFunction) {
+ this.options.iconCreateFunction = this._defaultIconCreateFunction;
+ }
+
+ this._featureGroup = L.featureGroup();
+ this._featureGroup.addEventParent(this);
+
+ this._nonPointGroup = L.featureGroup();
+ this._nonPointGroup.addEventParent(this);
+
+ this._inZoomAnimation = 0;
+ this._needsClustering = [];
+ this._needsRemoving = []; //Markers removed while we aren't on the map need to be kept track of
+ //The bounds of the currently shown area (from _getExpandedVisibleBounds) Updated on zoom/move
+ this._currentShownBounds = null;
+
+ this._queue = [];
+
+ this._childMarkerEventHandlers = {
+ 'dragstart': this._childMarkerDragStart,
+ 'move': this._childMarkerMoved,
+ 'dragend': this._childMarkerDragEnd,
+ };
+
+ // Hook the appropriate animation methods.
+ var animate = L.DomUtil.TRANSITION && this.options.animate;
+ L.extend(this, animate ? this._withAnimation : this._noAnimation);
+ // Remember which MarkerCluster class to instantiate (animated or not).
+ this._markerCluster = animate ? L.MarkerCluster : L.MarkerClusterNonAnimated;
+ },
+
+ addLayer: function (layer) {
+
+ if (layer instanceof L.LayerGroup) {
+ return this.addLayers([layer]);
+ }
+
+ //Don't cluster non point data
+ if (!layer.getLatLng) {
+ this._nonPointGroup.addLayer(layer);
+ this.fire('layeradd', { layer: layer });
+ return this;
+ }
+
+ if (!this._map) {
+ this._needsClustering.push(layer);
+ this.fire('layeradd', { layer: layer });
+ return this;
+ }
+
+ if (this.hasLayer(layer)) {
+ return this;
+ }
+
+
+ //If we have already clustered we'll need to add this one to a cluster
+
+ if (this._unspiderfy) {
+ this._unspiderfy();
+ }
+
+ this._addLayer(layer, this._maxZoom);
+ this.fire('layeradd', { layer: layer });
+
+ // Refresh bounds and weighted positions.
+ this._topClusterLevel._recalculateBounds();
+
+ this._refreshClustersIcons();
+
+ //Work out what is visible
+ var visibleLayer = layer,
+ currentZoom = this._zoom;
+ if (layer.__parent) {
+ while (visibleLayer.__parent._zoom >= currentZoom) {
+ visibleLayer = visibleLayer.__parent;
+ }
+ }
+
+ if (this._currentShownBounds.contains(visibleLayer.getLatLng())) {
+ if (this.options.animateAddingMarkers) {
+ this._animationAddLayer(layer, visibleLayer);
+ } else {
+ this._animationAddLayerNonAnimated(layer, visibleLayer);
+ }
+ }
+ return this;
+ },
+
+ removeLayer: function (layer) {
+
+ if (layer instanceof L.LayerGroup) {
+ return this.removeLayers([layer]);
+ }
+
+ //Non point layers
+ if (!layer.getLatLng) {
+ this._nonPointGroup.removeLayer(layer);
+ this.fire('layerremove', { layer: layer });
+ return this;
+ }
+
+ if (!this._map) {
+ if (!this._arraySplice(this._needsClustering, layer) && this.hasLayer(layer)) {
+ this._needsRemoving.push({ layer: layer, latlng: layer._latlng });
+ }
+ this.fire('layerremove', { layer: layer });
+ return this;
+ }
+
+ if (!layer.__parent) {
+ return this;
+ }
+
+ if (this._unspiderfy) {
+ this._unspiderfy();
+ this._unspiderfyLayer(layer);
+ }
+
+ //Remove the marker from clusters
+ this._removeLayer(layer, true);
+ this.fire('layerremove', { layer: layer });
+
+ // Refresh bounds and weighted positions.
+ this._topClusterLevel._recalculateBounds();
+
+ this._refreshClustersIcons();
+
+ layer.off(this._childMarkerEventHandlers, this);
+
+ if (this._featureGroup.hasLayer(layer)) {
+ this._featureGroup.removeLayer(layer);
+ if (layer.clusterShow) {
+ layer.clusterShow();
+ }
+ }
+
+ return this;
+ },
+
+ //Takes an array of markers and adds them in bulk
+ addLayers: function (layersArray, skipLayerAddEvent) {
+ if (!L.Util.isArray(layersArray)) {
+ return this.addLayer(layersArray);
+ }
+
+ var fg = this._featureGroup,
+ npg = this._nonPointGroup,
+ chunked = this.options.chunkedLoading,
+ chunkInterval = this.options.chunkInterval,
+ chunkProgress = this.options.chunkProgress,
+ l = layersArray.length,
+ offset = 0,
+ originalArray = true,
+ m;
+
+ if (this._map) {
+ var started = (new Date()).getTime();
+ var process = L.bind(function () {
+ var start = (new Date()).getTime();
+ for (; offset < l; offset++) {
+ if (chunked && offset % 200 === 0) {
+ // every couple hundred markers, instrument the time elapsed since processing started:
+ var elapsed = (new Date()).getTime() - start;
+ if (elapsed > chunkInterval) {
+ break; // been working too hard, time to take a break :-)
+ }
+ }
+
+ m = layersArray[offset];
+
+ // Group of layers, append children to layersArray and skip.
+ // Side effects:
+ // - Total increases, so chunkProgress ratio jumps backward.
+ // - Groups are not included in this group, only their non-group child layers (hasLayer).
+ // Changing array length while looping does not affect performance in current browsers:
+ // http://jsperf.com/for-loop-changing-length/6
+ if (m instanceof L.LayerGroup) {
+ if (originalArray) {
+ layersArray = layersArray.slice();
+ originalArray = false;
+ }
+ this._extractNonGroupLayers(m, layersArray);
+ l = layersArray.length;
+ continue;
+ }
+
+ //Not point data, can't be clustered
+ if (!m.getLatLng) {
+ npg.addLayer(m);
+ if (!skipLayerAddEvent) {
+ this.fire('layeradd', { layer: m });
+ }
+ continue;
+ }
+
+ if (this.hasLayer(m)) {
+ continue;
+ }
+
+ this._addLayer(m, this._maxZoom);
+ if (!skipLayerAddEvent) {
+ this.fire('layeradd', { layer: m });
+ }
+
+ //If we just made a cluster of size 2 then we need to remove the other marker from the map (if it is) or we never will
+ if (m.__parent) {
+ if (m.__parent.getChildCount() === 2) {
+ var markers = m.__parent.getAllChildMarkers(),
+ otherMarker = markers[0] === m ? markers[1] : markers[0];
+ fg.removeLayer(otherMarker);
+ }
+ }
+ }
+
+ if (chunkProgress) {
+ // report progress and time elapsed:
+ chunkProgress(offset, l, (new Date()).getTime() - started);
+ }
+
+ // Completed processing all markers.
+ if (offset === l) {
+
+ // Refresh bounds and weighted positions.
+ this._topClusterLevel._recalculateBounds();
+
+ this._refreshClustersIcons();
+
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, this._zoom, this._currentShownBounds);
+ } else {
+ setTimeout(process, this.options.chunkDelay);
+ }
+ }, this);
+
+ process();
+ } else {
+ var needsClustering = this._needsClustering;
+
+ for (; offset < l; offset++) {
+ m = layersArray[offset];
+
+ // Group of layers, append children to layersArray and skip.
+ if (m instanceof L.LayerGroup) {
+ if (originalArray) {
+ layersArray = layersArray.slice();
+ originalArray = false;
+ }
+ this._extractNonGroupLayers(m, layersArray);
+ l = layersArray.length;
+ continue;
+ }
+
+ //Not point data, can't be clustered
+ if (!m.getLatLng) {
+ npg.addLayer(m);
+ continue;
+ }
+
+ if (this.hasLayer(m)) {
+ continue;
+ }
+
+ needsClustering.push(m);
+ }
+ }
+ return this;
+ },
+
+ //Takes an array of markers and removes them in bulk
+ removeLayers: function (layersArray) {
+ var i, m,
+ l = layersArray.length,
+ fg = this._featureGroup,
+ npg = this._nonPointGroup,
+ originalArray = true;
+
+ if (!this._map) {
+ for (i = 0; i < l; i++) {
+ m = layersArray[i];
+
+ // Group of layers, append children to layersArray and skip.
+ if (m instanceof L.LayerGroup) {
+ if (originalArray) {
+ layersArray = layersArray.slice();
+ originalArray = false;
+ }
+ this._extractNonGroupLayers(m, layersArray);
+ l = layersArray.length;
+ continue;
+ }
+
+ this._arraySplice(this._needsClustering, m);
+ npg.removeLayer(m);
+ if (this.hasLayer(m)) {
+ this._needsRemoving.push({ layer: m, latlng: m._latlng });
+ }
+ this.fire('layerremove', { layer: m });
+ }
+ return this;
+ }
+
+ if (this._unspiderfy) {
+ this._unspiderfy();
+
+ // Work on a copy of the array, so that next loop is not affected.
+ var layersArray2 = layersArray.slice(),
+ l2 = l;
+ for (i = 0; i < l2; i++) {
+ m = layersArray2[i];
+
+ // Group of layers, append children to layersArray and skip.
+ if (m instanceof L.LayerGroup) {
+ this._extractNonGroupLayers(m, layersArray2);
+ l2 = layersArray2.length;
+ continue;
+ }
+
+ this._unspiderfyLayer(m);
+ }
+ }
+
+ for (i = 0; i < l; i++) {
+ m = layersArray[i];
+
+ // Group of layers, append children to layersArray and skip.
+ if (m instanceof L.LayerGroup) {
+ if (originalArray) {
+ layersArray = layersArray.slice();
+ originalArray = false;
+ }
+ this._extractNonGroupLayers(m, layersArray);
+ l = layersArray.length;
+ continue;
+ }
+
+ if (!m.__parent) {
+ npg.removeLayer(m);
+ this.fire('layerremove', { layer: m });
+ continue;
+ }
+
+ this._removeLayer(m, true, true);
+ this.fire('layerremove', { layer: m });
+
+ if (fg.hasLayer(m)) {
+ fg.removeLayer(m);
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+ }
+ }
+
+ // Refresh bounds and weighted positions.
+ this._topClusterLevel._recalculateBounds();
+
+ this._refreshClustersIcons();
+
+ //Fix up the clusters and markers on the map
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, this._zoom, this._currentShownBounds);
+
+ return this;
+ },
+
+ //Removes all layers from the MarkerClusterGroup
+ clearLayers: function () {
+ //Need our own special implementation as the LayerGroup one doesn't work for us
+
+ //If we aren't on the map (yet), blow away the markers we know of
+ if (!this._map) {
+ this._needsClustering = [];
+ this._needsRemoving = [];
+ delete this._gridClusters;
+ delete this._gridUnclustered;
+ }
+
+ if (this._noanimationUnspiderfy) {
+ this._noanimationUnspiderfy();
+ }
+
+ //Remove all the visible layers
+ this._featureGroup.clearLayers();
+ this._nonPointGroup.clearLayers();
+
+ this.eachLayer(function (marker) {
+ marker.off(this._childMarkerEventHandlers, this);
+ delete marker.__parent;
+ }, this);
+
+ if (this._map) {
+ //Reset _topClusterLevel and the DistanceGrids
+ this._generateInitialClusters();
+ }
+
+ return this;
+ },
+
+ //Override FeatureGroup.getBounds as it doesn't work
+ getBounds: function () {
+ var bounds = new L.LatLngBounds();
+
+ if (this._topClusterLevel) {
+ bounds.extend(this._topClusterLevel._bounds);
+ }
+
+ for (var i = this._needsClustering.length - 1; i >= 0; i--) {
+ bounds.extend(this._needsClustering[i].getLatLng());
+ }
+
+ bounds.extend(this._nonPointGroup.getBounds());
+
+ return bounds;
+ },
+
+ //Overrides LayerGroup.eachLayer
+ eachLayer: function (method, context) {
+ var markers = this._needsClustering.slice(),
+ needsRemoving = this._needsRemoving,
+ thisNeedsRemoving, i, j;
+
+ if (this._topClusterLevel) {
+ this._topClusterLevel.getAllChildMarkers(markers);
+ }
+
+ for (i = markers.length - 1; i >= 0; i--) {
+ thisNeedsRemoving = true;
+
+ for (j = needsRemoving.length - 1; j >= 0; j--) {
+ if (needsRemoving[j].layer === markers[i]) {
+ thisNeedsRemoving = false;
+ break;
+ }
+ }
+
+ if (thisNeedsRemoving) {
+ method.call(context, markers[i]);
+ }
+ }
+
+ this._nonPointGroup.eachLayer(method, context);
+ },
+
+ //Overrides LayerGroup.getLayers
+ getLayers: function () {
+ var layers = [];
+ this.eachLayer(function (l) {
+ layers.push(l);
+ });
+ return layers;
+ },
+
+ //Overrides LayerGroup.getLayer, WARNING: Really bad performance
+ getLayer: function (id) {
+ var result = null;
+
+ id = parseInt(id, 10);
+
+ this.eachLayer(function (l) {
+ if (L.stamp(l) === id) {
+ result = l;
+ }
+ });
+
+ return result;
+ },
+
+ //Returns true if the given layer is in this MarkerClusterGroup
+ hasLayer: function (layer) {
+ if (!layer) {
+ return false;
+ }
+
+ var i, anArray = this._needsClustering;
+
+ for (i = anArray.length - 1; i >= 0; i--) {
+ if (anArray[i] === layer) {
+ return true;
+ }
+ }
+
+ anArray = this._needsRemoving;
+ for (i = anArray.length - 1; i >= 0; i--) {
+ if (anArray[i].layer === layer) {
+ return false;
+ }
+ }
+
+ return !!(layer.__parent && layer.__parent._group === this) || this._nonPointGroup.hasLayer(layer);
+ },
+
+ //Zoom down to show the given layer (spiderfying if necessary) then calls the callback
+ zoomToShowLayer: function (layer, callback) {
+
+ if (typeof callback !== 'function') {
+ callback = function () {};
+ }
+
+ var showMarker = function () {
+ if ((layer._icon || layer.__parent._icon) && !this._inZoomAnimation) {
+ this._map.off('moveend', showMarker, this);
+ this.off('animationend', showMarker, this);
+
+ if (layer._icon) {
+ callback();
+ } else if (layer.__parent._icon) {
+ this.once('spiderfied', callback, this);
+ layer.__parent.spiderfy();
+ }
+ }
+ };
+
+ if (layer._icon && this._map.getBounds().contains(layer.getLatLng())) {
+ //Layer is visible ond on screen, immediate return
+ callback();
+ } else if (layer.__parent._zoom < Math.round(this._map._zoom)) {
+ //Layer should be visible at this zoom level. It must not be on screen so just pan over to it
+ this._map.on('moveend', showMarker, this);
+ this._map.panTo(layer.getLatLng());
+ } else {
+ this._map.on('moveend', showMarker, this);
+ this.on('animationend', showMarker, this);
+ layer.__parent.zoomToBounds();
+ }
+ },
+
+ //Overrides FeatureGroup.onAdd
+ onAdd: function (map) {
+ this._map = map;
+ var i, l, layer;
+
+ if (!isFinite(this._map.getMaxZoom())) {
+ throw "Map has no maxZoom specified";
+ }
+
+ this._featureGroup.addTo(map);
+ this._nonPointGroup.addTo(map);
+
+ if (!this._gridClusters) {
+ this._generateInitialClusters();
+ }
+
+ this._maxLat = map.options.crs.projection.MAX_LATITUDE;
+
+ //Restore all the positions as they are in the MCG before removing them
+ for (i = 0, l = this._needsRemoving.length; i < l; i++) {
+ layer = this._needsRemoving[i];
+ layer.newlatlng = layer.layer._latlng;
+ layer.layer._latlng = layer.latlng;
+ }
+ //Remove them, then restore their new positions
+ for (i = 0, l = this._needsRemoving.length; i < l; i++) {
+ layer = this._needsRemoving[i];
+ this._removeLayer(layer.layer, true);
+ layer.layer._latlng = layer.newlatlng;
+ }
+ this._needsRemoving = [];
+
+ //Remember the current zoom level and bounds
+ this._zoom = Math.round(this._map._zoom);
+ this._currentShownBounds = this._getExpandedVisibleBounds();
+
+ this._map.on('zoomend', this._zoomEnd, this);
+ this._map.on('moveend', this._moveEnd, this);
+
+ if (this._spiderfierOnAdd) { //TODO FIXME: Not sure how to have spiderfier add something on here nicely
+ this._spiderfierOnAdd();
+ }
+
+ this._bindEvents();
+
+ //Actually add our markers to the map:
+ l = this._needsClustering;
+ this._needsClustering = [];
+ this.addLayers(l, true);
+ },
+
+ //Overrides FeatureGroup.onRemove
+ onRemove: function (map) {
+ map.off('zoomend', this._zoomEnd, this);
+ map.off('moveend', this._moveEnd, this);
+
+ this._unbindEvents();
+
+ //In case we are in a cluster animation
+ this._map._mapPane.className = this._map._mapPane.className.replace(' leaflet-cluster-anim', '');
+
+ if (this._spiderfierOnRemove) { //TODO FIXME: Not sure how to have spiderfier add something on here nicely
+ this._spiderfierOnRemove();
+ }
+
+ delete this._maxLat;
+
+ //Clean up all the layers we added to the map
+ this._hideCoverage();
+ this._featureGroup.remove();
+ this._nonPointGroup.remove();
+
+ this._featureGroup.clearLayers();
+
+ this._map = null;
+ },
+
+ getVisibleParent: function (marker) {
+ var vMarker = marker;
+ while (vMarker && !vMarker._icon) {
+ vMarker = vMarker.__parent;
+ }
+ return vMarker || null;
+ },
+
+ //Remove the given object from the given array
+ _arraySplice: function (anArray, obj) {
+ for (var i = anArray.length - 1; i >= 0; i--) {
+ if (anArray[i] === obj) {
+ anArray.splice(i, 1);
+ return true;
+ }
+ }
+ },
+
+ /**
+ * Removes a marker from all _gridUnclustered zoom levels, starting at the supplied zoom.
+ * @param marker to be removed from _gridUnclustered.
+ * @param z integer bottom start zoom level (included)
+ * @private
+ */
+ _removeFromGridUnclustered: function (marker, z) {
+ var map = this._map,
+ gridUnclustered = this._gridUnclustered,
+ minZoom = Math.floor(this._map.getMinZoom());
+
+ for (; z >= minZoom; z--) {
+ if (!gridUnclustered[z].removeObject(marker, map.project(marker.getLatLng(), z))) {
+ break;
+ }
+ }
+ },
+
+ _childMarkerDragStart: function (e) {
+ e.target.__dragStart = e.target._latlng;
+ },
+
+ _childMarkerMoved: function (e) {
+ if (!this._ignoreMove && !e.target.__dragStart) {
+ var isPopupOpen = e.target._popup && e.target._popup.isOpen();
+
+ this._moveChild(e.target, e.oldLatLng, e.latlng);
+
+ if (isPopupOpen) {
+ e.target.openPopup();
+ }
+ }
+ },
+
+ _moveChild: function (layer, from, to) {
+ layer._latlng = from;
+ this.removeLayer(layer);
+
+ layer._latlng = to;
+ this.addLayer(layer);
+ },
+
+ _childMarkerDragEnd: function (e) {
+ var dragStart = e.target.__dragStart;
+ delete e.target.__dragStart;
+ if (dragStart) {
+ this._moveChild(e.target, dragStart, e.target._latlng);
+ }
+ },
+
+
+ //Internal function for removing a marker from everything.
+ //dontUpdateMap: set to true if you will handle updating the map manually (for bulk functions)
+ _removeLayer: function (marker, removeFromDistanceGrid, dontUpdateMap) {
+ var gridClusters = this._gridClusters,
+ gridUnclustered = this._gridUnclustered,
+ fg = this._featureGroup,
+ map = this._map,
+ minZoom = Math.floor(this._map.getMinZoom());
+
+ //Remove the marker from distance clusters it might be in
+ if (removeFromDistanceGrid) {
+ this._removeFromGridUnclustered(marker, this._maxZoom);
+ }
+
+ //Work our way up the clusters removing them as we go if required
+ var cluster = marker.__parent,
+ markers = cluster._markers,
+ otherMarker;
+
+ //Remove the marker from the immediate parents marker list
+ this._arraySplice(markers, marker);
+
+ while (cluster) {
+ cluster._childCount--;
+ cluster._boundsNeedUpdate = true;
+
+ if (cluster._zoom < minZoom) {
+ //Top level, do nothing
+ break;
+ } else if (removeFromDistanceGrid && cluster._childCount <= 1) { //Cluster no longer required
+ //We need to push the other marker up to the parent
+ otherMarker = cluster._markers[0] === marker ? cluster._markers[1] : cluster._markers[0];
+
+ //Update distance grid
+ gridClusters[cluster._zoom].removeObject(cluster, map.project(cluster._cLatLng, cluster._zoom));
+ gridUnclustered[cluster._zoom].addObject(otherMarker, map.project(otherMarker.getLatLng(), cluster._zoom));
+
+ //Move otherMarker up to parent
+ this._arraySplice(cluster.__parent._childClusters, cluster);
+ cluster.__parent._markers.push(otherMarker);
+ otherMarker.__parent = cluster.__parent;
+
+ if (cluster._icon) {
+ //Cluster is currently on the map, need to put the marker on the map instead
+ fg.removeLayer(cluster);
+ if (!dontUpdateMap) {
+ fg.addLayer(otherMarker);
+ }
+ }
+ } else {
+ cluster._iconNeedsUpdate = true;
+ }
+
+ cluster = cluster.__parent;
+ }
+
+ delete marker.__parent;
+ },
+
+ _isOrIsParent: function (el, oel) {
+ while (oel) {
+ if (el === oel) {
+ return true;
+ }
+ oel = oel.parentNode;
+ }
+ return false;
+ },
+
+ //Override L.Evented.fire
+ fire: function (type, data, propagate) {
+ if (data && data.layer instanceof L.MarkerCluster) {
+ //Prevent multiple clustermouseover/off events if the icon is made up of stacked divs (Doesn't work in ie <= 8, no relatedTarget)
+ if (data.originalEvent && this._isOrIsParent(data.layer._icon, data.originalEvent.relatedTarget)) {
+ return;
+ }
+ type = 'cluster' + type;
+ }
+
+ L.FeatureGroup.prototype.fire.call(this, type, data, propagate);
+ },
+
+ //Override L.Evented.listens
+ listens: function (type, propagate) {
+ return L.FeatureGroup.prototype.listens.call(this, type, propagate) || L.FeatureGroup.prototype.listens.call(this, 'cluster' + type, propagate);
+ },
+
+ //Default functionality
+ _defaultIconCreateFunction: function (cluster) {
+ var childCount = cluster.getChildCount();
+
+ var c = ' marker-cluster-';
+ if (childCount < 10) {
+ c += 'small';
+ } else if (childCount < 100) {
+ c += 'medium';
+ } else {
+ c += 'large';
+ }
+
+ return new L.DivIcon({ html: '<div><span>' + childCount + '</span></div>', className: 'marker-cluster' + c, iconSize: new L.Point(40, 40) });
+ },
+
+ _bindEvents: function () {
+ var map = this._map,
+ spiderfyOnMaxZoom = this.options.spiderfyOnMaxZoom,
+ showCoverageOnHover = this.options.showCoverageOnHover,
+ zoomToBoundsOnClick = this.options.zoomToBoundsOnClick;
+
+ //Zoom on cluster click or spiderfy if we are at the lowest level
+ if (spiderfyOnMaxZoom || zoomToBoundsOnClick) {
+ this.on('clusterclick', this._zoomOrSpiderfy, this);
+ }
+
+ //Show convex hull (boundary) polygon on mouse over
+ if (showCoverageOnHover) {
+ this.on('clustermouseover', this._showCoverage, this);
+ this.on('clustermouseout', this._hideCoverage, this);
+ map.on('zoomend', this._hideCoverage, this);
+ }
+ },
+
+ _zoomOrSpiderfy: function (e) {
+ var cluster = e.layer,
+ bottomCluster = cluster;
+
+ while (bottomCluster._childClusters.length === 1) {
+ bottomCluster = bottomCluster._childClusters[0];
+ }
+
+ if (bottomCluster._zoom === this._maxZoom &&
+ bottomCluster._childCount === cluster._childCount &&
+ this.options.spiderfyOnMaxZoom) {
+
+ // All child markers are contained in a single cluster from this._maxZoom to this cluster.
+ cluster.spiderfy();
+ } else if (this.options.zoomToBoundsOnClick) {
+ cluster.zoomToBounds();
+ }
+
+ // Focus the map again for keyboard users.
+ if (e.originalEvent && e.originalEvent.keyCode === 13) {
+ this._map._container.focus();
+ }
+ },
+
+ _showCoverage: function (e) {
+ var map = this._map;
+ if (this._inZoomAnimation) {
+ return;
+ }
+ if (this._shownPolygon) {
+ map.removeLayer(this._shownPolygon);
+ }
+ if (e.layer.getChildCount() > 2 && e.layer !== this._spiderfied) {
+ this._shownPolygon = new L.Polygon(e.layer.getConvexHull(), this.options.polygonOptions);
+ map.addLayer(this._shownPolygon);
+ }
+ },
+
+ _hideCoverage: function () {
+ if (this._shownPolygon) {
+ this._map.removeLayer(this._shownPolygon);
+ this._shownPolygon = null;
+ }
+ },
+
+ _unbindEvents: function () {
+ var spiderfyOnMaxZoom = this.options.spiderfyOnMaxZoom,
+ showCoverageOnHover = this.options.showCoverageOnHover,
+ zoomToBoundsOnClick = this.options.zoomToBoundsOnClick,
+ map = this._map;
+
+ if (spiderfyOnMaxZoom || zoomToBoundsOnClick) {
+ this.off('clusterclick', this._zoomOrSpiderfy, this);
+ }
+ if (showCoverageOnHover) {
+ this.off('clustermouseover', this._showCoverage, this);
+ this.off('clustermouseout', this._hideCoverage, this);
+ map.off('zoomend', this._hideCoverage, this);
+ }
+ },
+
+ _zoomEnd: function () {
+ if (!this._map) { //May have been removed from the map by a zoomEnd handler
+ return;
+ }
+ this._mergeSplitClusters();
+
+ this._zoom = Math.round(this._map._zoom);
+ this._currentShownBounds = this._getExpandedVisibleBounds();
+ },
+
+ _moveEnd: function () {
+ if (this._inZoomAnimation) {
+ return;
+ }
+
+ var newBounds = this._getExpandedVisibleBounds();
+
+ this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), this._zoom, newBounds);
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, Math.round(this._map._zoom), newBounds);
+
+ this._currentShownBounds = newBounds;
+ return;
+ },
+
+ _generateInitialClusters: function () {
+ var maxZoom = Math.ceil(this._map.getMaxZoom()),
+ minZoom = Math.floor(this._map.getMinZoom()),
+ radius = this.options.maxClusterRadius,
+ radiusFn = radius;
+
+ //If we just set maxClusterRadius to a single number, we need to create
+ //a simple function to return that number. Otherwise, we just have to
+ //use the function we've passed in.
+ if (typeof radius !== "function") {
+ radiusFn = function () { return radius; };
+ }
+
+ if (this.options.disableClusteringAtZoom !== null) {
+ maxZoom = this.options.disableClusteringAtZoom - 1;
+ }
+ this._maxZoom = maxZoom;
+ this._gridClusters = {};
+ this._gridUnclustered = {};
+
+ //Set up DistanceGrids for each zoom
+ for (var zoom = maxZoom; zoom >= minZoom; zoom--) {
+ this._gridClusters[zoom] = new L.DistanceGrid(radiusFn(zoom));
+ this._gridUnclustered[zoom] = new L.DistanceGrid(radiusFn(zoom));
+ }
+
+ // Instantiate the appropriate L.MarkerCluster class (animated or not).
+ this._topClusterLevel = new this._markerCluster(this, minZoom - 1);
+ },
+
+ //Zoom: Zoom to start adding at (Pass this._maxZoom to start at the bottom)
+ _addLayer: function (layer, zoom) {
+ var gridClusters = this._gridClusters,
+ gridUnclustered = this._gridUnclustered,
+ minZoom = Math.floor(this._map.getMinZoom()),
+ markerPoint, z;
+
+ if (this.options.singleMarkerMode) {
+ this._overrideMarkerIcon(layer);
+ }
+
+ layer.on(this._childMarkerEventHandlers, this);
+
+ //Find the lowest zoom level to slot this one in
+ for (; zoom >= minZoom; zoom--) {
+ markerPoint = this._map.project(layer.getLatLng(), zoom); // calculate pixel position
+
+ //Try find a cluster close by
+ var closest = gridClusters[zoom].getNearObject(markerPoint);
+ if (closest) {
+ closest._addChild(layer);
+ layer.__parent = closest;
+ return;
+ }
+
+ //Try find a marker close by to form a new cluster with
+ closest = gridUnclustered[zoom].getNearObject(markerPoint);
+ if (closest) {
+ var parent = closest.__parent;
+ if (parent) {
+ this._removeLayer(closest, false);
+ }
+
+ //Create new cluster with these 2 in it
+
+ var newCluster = new this._markerCluster(this, zoom, closest, layer);
+ gridClusters[zoom].addObject(newCluster, this._map.project(newCluster._cLatLng, zoom));
+ closest.__parent = newCluster;
+ layer.__parent = newCluster;
+
+ //First create any new intermediate parent clusters that don't exist
+ var lastParent = newCluster;
+ for (z = zoom - 1; z > parent._zoom; z--) {
+ lastParent = new this._markerCluster(this, z, lastParent);
+ gridClusters[z].addObject(lastParent, this._map.project(closest.getLatLng(), z));
+ }
+ parent._addChild(lastParent);
+
+ //Remove closest from this zoom level and any above that it is in, replace with newCluster
+ this._removeFromGridUnclustered(closest, zoom);
+
+ return;
+ }
+
+ //Didn't manage to cluster in at this zoom, record us as a marker here and continue upwards
+ gridUnclustered[zoom].addObject(layer, markerPoint);
+ }
+
+ //Didn't get in anything, add us to the top
+ this._topClusterLevel._addChild(layer);
+ layer.__parent = this._topClusterLevel;
+ return;
+ },
+
+ /**
+ * Refreshes the icon of all "dirty" visible clusters.
+ * Non-visible "dirty" clusters will be updated when they are added to the map.
+ * @private
+ */
+ _refreshClustersIcons: function () {
+ this._featureGroup.eachLayer(function (c) {
+ if (c instanceof L.MarkerCluster && c._iconNeedsUpdate) {
+ c._updateIcon();
+ }
+ });
+ },
+
+ //Enqueue code to fire after the marker expand/contract has happened
+ _enqueue: function (fn) {
+ this._queue.push(fn);
+ if (!this._queueTimeout) {
+ this._queueTimeout = setTimeout(L.bind(this._processQueue, this), 300);
+ }
+ },
+ _processQueue: function () {
+ for (var i = 0; i < this._queue.length; i++) {
+ this._queue[i].call(this);
+ }
+ this._queue.length = 0;
+ clearTimeout(this._queueTimeout);
+ this._queueTimeout = null;
+ },
+
+ //Merge and split any existing clusters that are too big or small
+ _mergeSplitClusters: function () {
+ var mapZoom = Math.round(this._map._zoom);
+
+ //In case we are starting to split before the animation finished
+ this._processQueue();
+
+ if (this._zoom < mapZoom && this._currentShownBounds.intersects(this._getExpandedVisibleBounds())) { //Zoom in, split
+ this._animationStart();
+ //Remove clusters now off screen
+ this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), this._zoom, this._getExpandedVisibleBounds());
+
+ this._animationZoomIn(this._zoom, mapZoom);
+
+ } else if (this._zoom > mapZoom) { //Zoom out, merge
+ this._animationStart();
+
+ this._animationZoomOut(this._zoom, mapZoom);
+ } else {
+ this._moveEnd();
+ }
+ },
+
+ //Gets the maps visible bounds expanded in each direction by the size of the screen (so the user cannot see an area we do not cover in one pan)
+ _getExpandedVisibleBounds: function () {
+ if (!this.options.removeOutsideVisibleBounds) {
+ return this._mapBoundsInfinite;
+ } else if (L.Browser.mobile) {
+ return this._checkBoundsMaxLat(this._map.getBounds());
+ }
+
+ return this._checkBoundsMaxLat(this._map.getBounds().pad(1)); // Padding expands the bounds by its own dimensions but scaled with the given factor.
+ },
+
+ /**
+ * Expands the latitude to Infinity (or -Infinity) if the input bounds reach the map projection maximum defined latitude
+ * (in the case of Web/Spherical Mercator, it is 85.0511287798 / see https://en.wikipedia.org/wiki/Web_Mercator#Formulas).
+ * Otherwise, the removeOutsideVisibleBounds option will remove markers beyond that limit, whereas the same markers without
+ * this option (or outside MCG) will have their position floored (ceiled) by the projection and rendered at that limit,
+ * making the user think that MCG "eats" them and never displays them again.
+ * @param bounds L.LatLngBounds
+ * @returns {L.LatLngBounds}
+ * @private
+ */
+ _checkBoundsMaxLat: function (bounds) {
+ var maxLat = this._maxLat;
+
+ if (maxLat !== undefined) {
+ if (bounds.getNorth() >= maxLat) {
+ bounds._northEast.lat = Infinity;
+ }
+ if (bounds.getSouth() <= -maxLat) {
+ bounds._southWest.lat = -Infinity;
+ }
+ }
+
+ return bounds;
+ },
+
+ //Shared animation code
+ _animationAddLayerNonAnimated: function (layer, newCluster) {
+ if (newCluster === layer) {
+ this._featureGroup.addLayer(layer);
+ } else if (newCluster._childCount === 2) {
+ newCluster._addToMap();
+
+ var markers = newCluster.getAllChildMarkers();
+ this._featureGroup.removeLayer(markers[0]);
+ this._featureGroup.removeLayer(markers[1]);
+ } else {
+ newCluster._updateIcon();
+ }
+ },
+
+ /**
+ * Extracts individual (i.e. non-group) layers from a Layer Group.
+ * @param group to extract layers from.
+ * @param output {Array} in which to store the extracted layers.
+ * @returns {*|Array}
+ * @private
+ */
+ _extractNonGroupLayers: function (group, output) {
+ var layers = group.getLayers(),
+ i = 0,
+ layer;
+
+ output = output || [];
+
+ for (; i < layers.length; i++) {
+ layer = layers[i];
+
+ if (layer instanceof L.LayerGroup) {
+ this._extractNonGroupLayers(layer, output);
+ continue;
+ }
+
+ output.push(layer);
+ }
+
+ return output;
+ },
+
+ /**
+ * Implements the singleMarkerMode option.
+ * @param layer Marker to re-style using the Clusters iconCreateFunction.
+ * @returns {L.Icon} The newly created icon.
+ * @private
+ */
+ _overrideMarkerIcon: function (layer) {
+ var icon = layer.options.icon = this.options.iconCreateFunction({
+ getChildCount: function () {
+ return 1;
+ },
+ getAllChildMarkers: function () {
+ return [layer];
+ }
+ });
+
+ return icon;
+ }
+});
+
+// Constant bounds used in case option "removeOutsideVisibleBounds" is set to false.
+L.MarkerClusterGroup.include({
+ _mapBoundsInfinite: new L.LatLngBounds(new L.LatLng(-Infinity, -Infinity), new L.LatLng(Infinity, Infinity))
+});
+
+L.MarkerClusterGroup.include({
+ _noAnimation: {
+ //Non Animated versions of everything
+ _animationStart: function () {
+ //Do nothing...
+ },
+ _animationZoomIn: function (previousZoomLevel, newZoomLevel) {
+ this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel);
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
+
+ //We didn't actually animate, but we use this event to mean "clustering animations have finished"
+ this.fire('animationend');
+ },
+ _animationZoomOut: function (previousZoomLevel, newZoomLevel) {
+ this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel);
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
+
+ //We didn't actually animate, but we use this event to mean "clustering animations have finished"
+ this.fire('animationend');
+ },
+ _animationAddLayer: function (layer, newCluster) {
+ this._animationAddLayerNonAnimated(layer, newCluster);
+ }
+ },
+
+ _withAnimation: {
+ //Animated versions here
+ _animationStart: function () {
+ this._map._mapPane.className += ' leaflet-cluster-anim';
+ this._inZoomAnimation++;
+ },
+
+ _animationZoomIn: function (previousZoomLevel, newZoomLevel) {
+ var bounds = this._getExpandedVisibleBounds(),
+ fg = this._featureGroup,
+ minZoom = Math.floor(this._map.getMinZoom()),
+ i;
+
+ this._ignoreMove = true;
+
+ //Add all children of current clusters to map and remove those clusters from map
+ this._topClusterLevel._recursively(bounds, previousZoomLevel, minZoom, function (c) {
+ var startPos = c._latlng,
+ markers = c._markers,
+ m;
+
+ if (!bounds.contains(startPos)) {
+ startPos = null;
+ }
+
+ if (c._isSingleParent() && previousZoomLevel + 1 === newZoomLevel) { //Immediately add the new child and remove us
+ fg.removeLayer(c);
+ c._recursivelyAddChildrenToMap(null, newZoomLevel, bounds);
+ } else {
+ //Fade out old cluster
+ c.clusterHide();
+ c._recursivelyAddChildrenToMap(startPos, newZoomLevel, bounds);
+ }
+
+ //Remove all markers that aren't visible any more
+ //TODO: Do we actually need to do this on the higher levels too?
+ for (i = markers.length - 1; i >= 0; i--) {
+ m = markers[i];
+ if (!bounds.contains(m._latlng)) {
+ fg.removeLayer(m);
+ }
+ }
+
+ });
+
+ this._forceLayout();
+
+ //Update opacities
+ this._topClusterLevel._recursivelyBecomeVisible(bounds, newZoomLevel);
+ //TODO Maybe? Update markers in _recursivelyBecomeVisible
+ fg.eachLayer(function (n) {
+ if (!(n instanceof L.MarkerCluster) && n._icon) {
+ n.clusterShow();
+ }
+ });
+
+ //update the positions of the just added clusters/markers
+ this._topClusterLevel._recursively(bounds, previousZoomLevel, newZoomLevel, function (c) {
+ c._recursivelyRestoreChildPositions(newZoomLevel);
+ });
+
+ this._ignoreMove = false;
+
+ //Remove the old clusters and close the zoom animation
+ this._enqueue(function () {
+ //update the positions of the just added clusters/markers
+ this._topClusterLevel._recursively(bounds, previousZoomLevel, minZoom, function (c) {
+ fg.removeLayer(c);
+ c.clusterShow();
+ });
+
+ this._animationEnd();
+ });
+ },
+
+ _animationZoomOut: function (previousZoomLevel, newZoomLevel) {
+ this._animationZoomOutSingle(this._topClusterLevel, previousZoomLevel - 1, newZoomLevel);
+
+ //Need to add markers for those that weren't on the map before but are now
+ this._topClusterLevel._recursivelyAddChildrenToMap(null, newZoomLevel, this._getExpandedVisibleBounds());
+ //Remove markers that were on the map before but won't be now
+ this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, Math.floor(this._map.getMinZoom()), previousZoomLevel, this._getExpandedVisibleBounds());
+ },
+
+ _animationAddLayer: function (layer, newCluster) {
+ var me = this,
+ fg = this._featureGroup;
+
+ fg.addLayer(layer);
+ if (newCluster !== layer) {
+ if (newCluster._childCount > 2) { //Was already a cluster
+
+ newCluster._updateIcon();
+ this._forceLayout();
+ this._animationStart();
+
+ layer._setPos(this._map.latLngToLayerPoint(newCluster.getLatLng()));
+ layer.clusterHide();
+
+ this._enqueue(function () {
+ fg.removeLayer(layer);
+ layer.clusterShow();
+
+ me._animationEnd();
+ });
+
+ } else { //Just became a cluster
+ this._forceLayout();
+
+ me._animationStart();
+ me._animationZoomOutSingle(newCluster, this._map.getMaxZoom(), this._zoom);
+ }
+ }
+ }
+ },
+
+ // Private methods for animated versions.
+ _animationZoomOutSingle: function (cluster, previousZoomLevel, newZoomLevel) {
+ var bounds = this._getExpandedVisibleBounds(),
+ minZoom = Math.floor(this._map.getMinZoom());
+
+ //Animate all of the markers in the clusters to move to their cluster center point
+ cluster._recursivelyAnimateChildrenInAndAddSelfToMap(bounds, minZoom, previousZoomLevel + 1, newZoomLevel);
+
+ var me = this;
+
+ //Update the opacity (If we immediately set it they won't animate)
+ this._forceLayout();
+ cluster._recursivelyBecomeVisible(bounds, newZoomLevel);
+
+ //TODO: Maybe use the transition timing stuff to make this more reliable
+ //When the animations are done, tidy up
+ this._enqueue(function () {
+
+ //This cluster stopped being a cluster before the timeout fired
+ if (cluster._childCount === 1) {
+ var m = cluster._markers[0];
+ //If we were in a cluster animation at the time then the opacity and position of our child could be wrong now, so fix it
+ this._ignoreMove = true;
+ m.setLatLng(m.getLatLng());
+ this._ignoreMove = false;
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+ } else {
+ cluster._recursively(bounds, newZoomLevel, minZoom, function (c) {
+ c._recursivelyRemoveChildrenFromMap(bounds, minZoom, previousZoomLevel + 1);
+ });
+ }
+ me._animationEnd();
+ });
+ },
+
+ _animationEnd: function () {
+ if (this._map) {
+ this._map._mapPane.className = this._map._mapPane.className.replace(' leaflet-cluster-anim', '');
+ }
+ this._inZoomAnimation--;
+ this.fire('animationend');
+ },
+
+ //Force a browser layout of stuff in the map
+ // Should apply the current opacity and location to all elements so we can update them again for an animation
+ _forceLayout: function () {
+ //In my testing this works, infact offsetWidth of any element seems to work.
+ //Could loop all this._layers and do this for each _icon if it stops working
+
+ L.Util.falseFn(document.body.offsetWidth);
+ }
+});
+
+L.markerClusterGroup = function (options) {
+ return new L.MarkerClusterGroup(options);
+};
+
+var MarkerCluster = L.MarkerCluster = L.Marker.extend({
+ options: L.Icon.prototype.options,
+
+ initialize: function (group, zoom, a, b) {
+
+ L.Marker.prototype.initialize.call(this, a ? (a._cLatLng || a.getLatLng()) : new L.LatLng(0, 0),
+ { icon: this, pane: group.options.clusterPane });
+
+ this._group = group;
+ this._zoom = zoom;
+
+ this._markers = [];
+ this._childClusters = [];
+ this._childCount = 0;
+ this._iconNeedsUpdate = true;
+ this._boundsNeedUpdate = true;
+
+ this._bounds = new L.LatLngBounds();
+
+ if (a) {
+ this._addChild(a);
+ }
+ if (b) {
+ this._addChild(b);
+ }
+ },
+
+ //Recursively retrieve all child markers of this cluster
+ getAllChildMarkers: function (storageArray, ignoreDraggedMarker) {
+ storageArray = storageArray || [];
+
+ for (var i = this._childClusters.length - 1; i >= 0; i--) {
+ this._childClusters[i].getAllChildMarkers(storageArray);
+ }
+
+ for (var j = this._markers.length - 1; j >= 0; j--) {
+ if (ignoreDraggedMarker && this._markers[j].__dragStart) {
+ continue;
+ }
+ storageArray.push(this._markers[j]);
+ }
+
+ return storageArray;
+ },
+
+ //Returns the count of how many child markers we have
+ getChildCount: function () {
+ return this._childCount;
+ },
+
+ //Zoom to the minimum of showing all of the child markers, or the extents of this cluster
+ zoomToBounds: function (fitBoundsOptions) {
+ var childClusters = this._childClusters.slice(),
+ map = this._group._map,
+ boundsZoom = map.getBoundsZoom(this._bounds),
+ zoom = this._zoom + 1,
+ mapZoom = map.getZoom(),
+ i;
+
+ //calculate how far we need to zoom down to see all of the markers
+ while (childClusters.length > 0 && boundsZoom > zoom) {
+ zoom++;
+ var newClusters = [];
+ for (i = 0; i < childClusters.length; i++) {
+ newClusters = newClusters.concat(childClusters[i]._childClusters);
+ }
+ childClusters = newClusters;
+ }
+
+ if (boundsZoom > zoom) {
+ this._group._map.setView(this._latlng, zoom);
+ } else if (boundsZoom <= mapZoom) { //If fitBounds wouldn't zoom us down, zoom us down instead
+ this._group._map.setView(this._latlng, mapZoom + 1);
+ } else {
+ this._group._map.fitBounds(this._bounds, fitBoundsOptions);
+ }
+ },
+
+ getBounds: function () {
+ var bounds = new L.LatLngBounds();
+ bounds.extend(this._bounds);
+ return bounds;
+ },
+
+ _updateIcon: function () {
+ this._iconNeedsUpdate = true;
+ if (this._icon) {
+ this.setIcon(this);
+ }
+ },
+
+ //Cludge for Icon, we pretend to be an icon for performance
+ createIcon: function () {
+ if (this._iconNeedsUpdate) {
+ this._iconObj = this._group.options.iconCreateFunction(this);
+ this._iconNeedsUpdate = false;
+ }
+ return this._iconObj.createIcon();
+ },
+ createShadow: function () {
+ return this._iconObj.createShadow();
+ },
+
+
+ _addChild: function (new1, isNotificationFromChild) {
+
+ this._iconNeedsUpdate = true;
+
+ this._boundsNeedUpdate = true;
+ this._setClusterCenter(new1);
+
+ if (new1 instanceof L.MarkerCluster) {
+ if (!isNotificationFromChild) {
+ this._childClusters.push(new1);
+ new1.__parent = this;
+ }
+ this._childCount += new1._childCount;
+ } else {
+ if (!isNotificationFromChild) {
+ this._markers.push(new1);
+ }
+ this._childCount++;
+ }
+
+ if (this.__parent) {
+ this.__parent._addChild(new1, true);
+ }
+ },
+
+ /**
+ * Makes sure the cluster center is set. If not, uses the child center if it is a cluster, or the marker position.
+ * @param child L.MarkerCluster|L.Marker that will be used as cluster center if not defined yet.
+ * @private
+ */
+ _setClusterCenter: function (child) {
+ if (!this._cLatLng) {
+ // when clustering, take position of the first point as the cluster center
+ this._cLatLng = child._cLatLng || child._latlng;
+ }
+ },
+
+ /**
+ * Assigns impossible bounding values so that the next extend entirely determines the new bounds.
+ * This method avoids having to trash the previous L.LatLngBounds object and to create a new one, which is much slower for this class.
+ * As long as the bounds are not extended, most other methods would probably fail, as they would with bounds initialized but not extended.
+ * @private
+ */
+ _resetBounds: function () {
+ var bounds = this._bounds;
+
+ if (bounds._southWest) {
+ bounds._southWest.lat = Infinity;
+ bounds._southWest.lng = Infinity;
+ }
+ if (bounds._northEast) {
+ bounds._northEast.lat = -Infinity;
+ bounds._northEast.lng = -Infinity;
+ }
+ },
+
+ _recalculateBounds: function () {
+ var markers = this._markers,
+ childClusters = this._childClusters,
+ latSum = 0,
+ lngSum = 0,
+ totalCount = this._childCount,
+ i, child, childLatLng, childCount;
+
+ // Case where all markers are removed from the map and we are left with just an empty _topClusterLevel.
+ if (totalCount === 0) {
+ return;
+ }
+
+ // Reset rather than creating a new object, for performance.
+ this._resetBounds();
+
+ // Child markers.
+ for (i = 0; i < markers.length; i++) {
+ childLatLng = markers[i]._latlng;
+
+ this._bounds.extend(childLatLng);
+
+ latSum += childLatLng.lat;
+ lngSum += childLatLng.lng;
+ }
+
+ // Child clusters.
+ for (i = 0; i < childClusters.length; i++) {
+ child = childClusters[i];
+
+ // Re-compute child bounds and weighted position first if necessary.
+ if (child._boundsNeedUpdate) {
+ child._recalculateBounds();
+ }
+
+ this._bounds.extend(child._bounds);
+
+ childLatLng = child._wLatLng;
+ childCount = child._childCount;
+
+ latSum += childLatLng.lat * childCount;
+ lngSum += childLatLng.lng * childCount;
+ }
+
+ this._latlng = this._wLatLng = new L.LatLng(latSum / totalCount, lngSum / totalCount);
+
+ // Reset dirty flag.
+ this._boundsNeedUpdate = false;
+ },
+
+ //Set our markers position as given and add it to the map
+ _addToMap: function (startPos) {
+ if (startPos) {
+ this._backupLatlng = this._latlng;
+ this.setLatLng(startPos);
+ }
+ this._group._featureGroup.addLayer(this);
+ },
+
+ _recursivelyAnimateChildrenIn: function (bounds, center, maxZoom) {
+ this._recursively(bounds, this._group._map.getMinZoom(), maxZoom - 1,
+ function (c) {
+ var markers = c._markers,
+ i, m;
+ for (i = markers.length - 1; i >= 0; i--) {
+ m = markers[i];
+
+ //Only do it if the icon is still on the map
+ if (m._icon) {
+ m._setPos(center);
+ m.clusterHide();
+ }
+ }
+ },
+ function (c) {
+ var childClusters = c._childClusters,
+ j, cm;
+ for (j = childClusters.length - 1; j >= 0; j--) {
+ cm = childClusters[j];
+ if (cm._icon) {
+ cm._setPos(center);
+ cm.clusterHide();
+ }
+ }
+ }
+ );
+ },
+
+ _recursivelyAnimateChildrenInAndAddSelfToMap: function (bounds, mapMinZoom, previousZoomLevel, newZoomLevel) {
+ this._recursively(bounds, newZoomLevel, mapMinZoom,
+ function (c) {
+ c._recursivelyAnimateChildrenIn(bounds, c._group._map.latLngToLayerPoint(c.getLatLng()).round(), previousZoomLevel);
+
+ //TODO: depthToAnimateIn affects _isSingleParent, if there is a multizoom we may/may not be.
+ //As a hack we only do a animation free zoom on a single level zoom, if someone does multiple levels then we always animate
+ if (c._isSingleParent() && previousZoomLevel - 1 === newZoomLevel) {
+ c.clusterShow();
+ c._recursivelyRemoveChildrenFromMap(bounds, mapMinZoom, previousZoomLevel); //Immediately remove our children as we are replacing them. TODO previousBounds not bounds
+ } else {
+ c.clusterHide();
+ }
+
+ c._addToMap();
+ }
+ );
+ },
+
+ _recursivelyBecomeVisible: function (bounds, zoomLevel) {
+ this._recursively(bounds, this._group._map.getMinZoom(), zoomLevel, null, function (c) {
+ c.clusterShow();
+ });
+ },
+
+ _recursivelyAddChildrenToMap: function (startPos, zoomLevel, bounds) {
+ this._recursively(bounds, this._group._map.getMinZoom() - 1, zoomLevel,
+ function (c) {
+ if (zoomLevel === c._zoom) {
+ return;
+ }
+
+ //Add our child markers at startPos (so they can be animated out)
+ for (var i = c._markers.length - 1; i >= 0; i--) {
+ var nm = c._markers[i];
+
+ if (!bounds.contains(nm._latlng)) {
+ continue;
+ }
+
+ if (startPos) {
+ nm._backupLatlng = nm.getLatLng();
+
+ nm.setLatLng(startPos);
+ if (nm.clusterHide) {
+ nm.clusterHide();
+ }
+ }
+
+ c._group._featureGroup.addLayer(nm);
+ }
+ },
+ function (c) {
+ c._addToMap(startPos);
+ }
+ );
+ },
+
+ _recursivelyRestoreChildPositions: function (zoomLevel) {
+ //Fix positions of child markers
+ for (var i = this._markers.length - 1; i >= 0; i--) {
+ var nm = this._markers[i];
+ if (nm._backupLatlng) {
+ nm.setLatLng(nm._backupLatlng);
+ delete nm._backupLatlng;
+ }
+ }
+
+ if (zoomLevel - 1 === this._zoom) {
+ //Reposition child clusters
+ for (var j = this._childClusters.length - 1; j >= 0; j--) {
+ this._childClusters[j]._restorePosition();
+ }
+ } else {
+ for (var k = this._childClusters.length - 1; k >= 0; k--) {
+ this._childClusters[k]._recursivelyRestoreChildPositions(zoomLevel);
+ }
+ }
+ },
+
+ _restorePosition: function () {
+ if (this._backupLatlng) {
+ this.setLatLng(this._backupLatlng);
+ delete this._backupLatlng;
+ }
+ },
+
+ //exceptBounds: If set, don't remove any markers/clusters in it
+ _recursivelyRemoveChildrenFromMap: function (previousBounds, mapMinZoom, zoomLevel, exceptBounds) {
+ var m, i;
+ this._recursively(previousBounds, mapMinZoom - 1, zoomLevel - 1,
+ function (c) {
+ //Remove markers at every level
+ for (i = c._markers.length - 1; i >= 0; i--) {
+ m = c._markers[i];
+ if (!exceptBounds || !exceptBounds.contains(m._latlng)) {
+ c._group._featureGroup.removeLayer(m);
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+ }
+ }
+ },
+ function (c) {
+ //Remove child clusters at just the bottom level
+ for (i = c._childClusters.length - 1; i >= 0; i--) {
+ m = c._childClusters[i];
+ if (!exceptBounds || !exceptBounds.contains(m._latlng)) {
+ c._group._featureGroup.removeLayer(m);
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+ }
+ }
+ }
+ );
+ },
+
+ //Run the given functions recursively to this and child clusters
+ // boundsToApplyTo: a L.LatLngBounds representing the bounds of what clusters to recurse in to
+ // zoomLevelToStart: zoom level to start running functions (inclusive)
+ // zoomLevelToStop: zoom level to stop running functions (inclusive)
+ // runAtEveryLevel: function that takes an L.MarkerCluster as an argument that should be applied on every level
+ // runAtBottomLevel: function that takes an L.MarkerCluster as an argument that should be applied at only the bottom level
+ _recursively: function (boundsToApplyTo, zoomLevelToStart, zoomLevelToStop, runAtEveryLevel, runAtBottomLevel) {
+ var childClusters = this._childClusters,
+ zoom = this._zoom,
+ i, c;
+
+ if (zoomLevelToStart <= zoom) {
+ if (runAtEveryLevel) {
+ runAtEveryLevel(this);
+ }
+ if (runAtBottomLevel && zoom === zoomLevelToStop) {
+ runAtBottomLevel(this);
+ }
+ }
+
+ if (zoom < zoomLevelToStart || zoom < zoomLevelToStop) {
+ for (i = childClusters.length - 1; i >= 0; i--) {
+ c = childClusters[i];
+ if (c._boundsNeedUpdate) {
+ c._recalculateBounds();
+ }
+ if (boundsToApplyTo.intersects(c._bounds)) {
+ c._recursively(boundsToApplyTo, zoomLevelToStart, zoomLevelToStop, runAtEveryLevel, runAtBottomLevel);
+ }
+ }
+ }
+ },
+
+ //Returns true if we are the parent of only one cluster and that cluster is the same as us
+ _isSingleParent: function () {
+ //Don't need to check this._markers as the rest won't work if there are any
+ return this._childClusters.length > 0 && this._childClusters[0]._childCount === this._childCount;
+ }
+});
+
+/*
+* Extends L.Marker to include two extra methods: clusterHide and clusterShow.
+*
+* They work as setOpacity(0) and setOpacity(1) respectively, but
+* don't overwrite the options.opacity
+*
+*/
+
+L.Marker.include({
+ clusterHide: function () {
+ var backup = this.options.opacity;
+ this.setOpacity(0);
+ this.options.opacity = backup;
+ return this;
+ },
+
+ clusterShow: function () {
+ return this.setOpacity(this.options.opacity);
+ }
+});
+
+L.DistanceGrid = function (cellSize) {
+ this._cellSize = cellSize;
+ this._sqCellSize = cellSize * cellSize;
+ this._grid = {};
+ this._objectPoint = { };
+};
+
+L.DistanceGrid.prototype = {
+
+ addObject: function (obj, point) {
+ var x = this._getCoord(point.x),
+ y = this._getCoord(point.y),
+ grid = this._grid,
+ row = grid[y] = grid[y] || {},
+ cell = row[x] = row[x] || [],
+ stamp = L.Util.stamp(obj);
+
+ this._objectPoint[stamp] = point;
+
+ cell.push(obj);
+ },
+
+ updateObject: function (obj, point) {
+ this.removeObject(obj);
+ this.addObject(obj, point);
+ },
+
+ //Returns true if the object was found
+ removeObject: function (obj, point) {
+ var x = this._getCoord(point.x),
+ y = this._getCoord(point.y),
+ grid = this._grid,
+ row = grid[y] = grid[y] || {},
+ cell = row[x] = row[x] || [],
+ i, len;
+
+ delete this._objectPoint[L.Util.stamp(obj)];
+
+ for (i = 0, len = cell.length; i < len; i++) {
+ if (cell[i] === obj) {
+
+ cell.splice(i, 1);
+
+ if (len === 1) {
+ delete row[x];
+ }
+
+ return true;
+ }
+ }
+
+ },
+
+ eachObject: function (fn, context) {
+ var i, j, k, len, row, cell, removed,
+ grid = this._grid;
+
+ for (i in grid) {
+ row = grid[i];
+
+ for (j in row) {
+ cell = row[j];
+
+ for (k = 0, len = cell.length; k < len; k++) {
+ removed = fn.call(context, cell[k]);
+ if (removed) {
+ k--;
+ len--;
+ }
+ }
+ }
+ }
+ },
+
+ getNearObject: function (point) {
+ var x = this._getCoord(point.x),
+ y = this._getCoord(point.y),
+ i, j, k, row, cell, len, obj, dist,
+ objectPoint = this._objectPoint,
+ closestDistSq = this._sqCellSize,
+ closest = null;
+
+ for (i = y - 1; i <= y + 1; i++) {
+ row = this._grid[i];
+ if (row) {
+
+ for (j = x - 1; j <= x + 1; j++) {
+ cell = row[j];
+ if (cell) {
+
+ for (k = 0, len = cell.length; k < len; k++) {
+ obj = cell[k];
+ dist = this._sqDist(objectPoint[L.Util.stamp(obj)], point);
+ if (dist < closestDistSq ||
+ dist <= closestDistSq && closest === null) {
+ closestDistSq = dist;
+ closest = obj;
+ }
+ }
+ }
+ }
+ }
+ }
+ return closest;
+ },
+
+ _getCoord: function (x) {
+ var coord = Math.floor(x / this._cellSize);
+ return isFinite(coord) ? coord : x;
+ },
+
+ _sqDist: function (p, p2) {
+ var dx = p2.x - p.x,
+ dy = p2.y - p.y;
+ return dx * dx + dy * dy;
+ }
+};
+
+/* Copyright (c) 2012 the authors listed at the following URL, and/or
+the authors of referenced articles or incorporated external code:
+http://en.literateprograms.org/Quickhull_(Javascript)?action=history&offset=20120410175256
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Retrieved from: http://en.literateprograms.org/Quickhull_(Javascript)?oldid=18434
+*/
+
+(function () {
+ L.QuickHull = {
+
+ /*
+ * @param {Object} cpt a point to be measured from the baseline
+ * @param {Array} bl the baseline, as represented by a two-element
+ * array of latlng objects.
+ * @returns {Number} an approximate distance measure
+ */
+ getDistant: function (cpt, bl) {
+ var vY = bl[1].lat - bl[0].lat,
+ vX = bl[0].lng - bl[1].lng;
+ return (vX * (cpt.lat - bl[0].lat) + vY * (cpt.lng - bl[0].lng));
+ },
+
+ /*
+ * @param {Array} baseLine a two-element array of latlng objects
+ * representing the baseline to project from
+ * @param {Array} latLngs an array of latlng objects
+ * @returns {Object} the maximum point and all new points to stay
+ * in consideration for the hull.
+ */
+ findMostDistantPointFromBaseLine: function (baseLine, latLngs) {
+ var maxD = 0,
+ maxPt = null,
+ newPoints = [],
+ i, pt, d;
+
+ for (i = latLngs.length - 1; i >= 0; i--) {
+ pt = latLngs[i];
+ d = this.getDistant(pt, baseLine);
+
+ if (d > 0) {
+ newPoints.push(pt);
+ } else {
+ continue;
+ }
+
+ if (d > maxD) {
+ maxD = d;
+ maxPt = pt;
+ }
+ }
+
+ return { maxPoint: maxPt, newPoints: newPoints };
+ },
+
+
+ /*
+ * Given a baseline, compute the convex hull of latLngs as an array
+ * of latLngs.
+ *
+ * @param {Array} latLngs
+ * @returns {Array}
+ */
+ buildConvexHull: function (baseLine, latLngs) {
+ var convexHullBaseLines = [],
+ t = this.findMostDistantPointFromBaseLine(baseLine, latLngs);
+
+ if (t.maxPoint) { // if there is still a point "outside" the base line
+ convexHullBaseLines =
+ convexHullBaseLines.concat(
+ this.buildConvexHull([baseLine[0], t.maxPoint], t.newPoints)
+ );
+ convexHullBaseLines =
+ convexHullBaseLines.concat(
+ this.buildConvexHull([t.maxPoint, baseLine[1]], t.newPoints)
+ );
+ return convexHullBaseLines;
+ } else { // if there is no more point "outside" the base line, the current base line is part of the convex hull
+ return [baseLine[0]];
+ }
+ },
+
+ /*
+ * Given an array of latlngs, compute a convex hull as an array
+ * of latlngs
+ *
+ * @param {Array} latLngs
+ * @returns {Array}
+ */
+ getConvexHull: function (latLngs) {
+ // find first baseline
+ var maxLat = false, minLat = false,
+ maxLng = false, minLng = false,
+ maxLatPt = null, minLatPt = null,
+ maxLngPt = null, minLngPt = null,
+ maxPt = null, minPt = null,
+ i;
+
+ for (i = latLngs.length - 1; i >= 0; i--) {
+ var pt = latLngs[i];
+ if (maxLat === false || pt.lat > maxLat) {
+ maxLatPt = pt;
+ maxLat = pt.lat;
+ }
+ if (minLat === false || pt.lat < minLat) {
+ minLatPt = pt;
+ minLat = pt.lat;
+ }
+ if (maxLng === false || pt.lng > maxLng) {
+ maxLngPt = pt;
+ maxLng = pt.lng;
+ }
+ if (minLng === false || pt.lng < minLng) {
+ minLngPt = pt;
+ minLng = pt.lng;
+ }
+ }
+
+ if (minLat !== maxLat) {
+ minPt = minLatPt;
+ maxPt = maxLatPt;
+ } else {
+ minPt = minLngPt;
+ maxPt = maxLngPt;
+ }
+
+ var ch = [].concat(this.buildConvexHull([minPt, maxPt], latLngs),
+ this.buildConvexHull([maxPt, minPt], latLngs));
+ return ch;
+ }
+ };
+}());
+
+L.MarkerCluster.include({
+ getConvexHull: function () {
+ var childMarkers = this.getAllChildMarkers(),
+ points = [],
+ p, i;
+
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ p = childMarkers[i].getLatLng();
+ points.push(p);
+ }
+
+ return L.QuickHull.getConvexHull(points);
+ }
+});
+
+//This code is 100% based on https://github.com/jawj/OverlappingMarkerSpiderfier-Leaflet
+//Huge thanks to jawj for implementing it first to make my job easy :-)
+
+L.MarkerCluster.include({
+
+ _2PI: Math.PI * 2,
+ _circleFootSeparation: 25, //related to circumference of circle
+ _circleStartAngle: 0,
+
+ _spiralFootSeparation: 28, //related to size of spiral (experiment!)
+ _spiralLengthStart: 11,
+ _spiralLengthFactor: 5,
+
+ _circleSpiralSwitchover: 9, //show spiral instead of circle from this marker count upwards.
+ // 0 -> always spiral; Infinity -> always circle
+
+ spiderfy: function () {
+ if (this._group._spiderfied === this || this._group._inZoomAnimation) {
+ return;
+ }
+
+ var childMarkers = this.getAllChildMarkers(null, true),
+ group = this._group,
+ map = group._map,
+ center = map.latLngToLayerPoint(this._latlng),
+ positions;
+
+ this._group._unspiderfy();
+ this._group._spiderfied = this;
+
+ //TODO Maybe: childMarkers order by distance to center
+
+ if (childMarkers.length >= this._circleSpiralSwitchover) {
+ positions = this._generatePointsSpiral(childMarkers.length, center);
+ } else {
+ center.y += 10; // Otherwise circles look wrong => hack for standard blue icon, renders differently for other icons.
+ positions = this._generatePointsCircle(childMarkers.length, center);
+ }
+
+ this._animationSpiderfy(childMarkers, positions);
+ },
+
+ unspiderfy: function (zoomDetails) {
+ /// <param Name="zoomDetails">Argument from zoomanim if being called in a zoom animation or null otherwise</param>
+ if (this._group._inZoomAnimation) {
+ return;
+ }
+ this._animationUnspiderfy(zoomDetails);
+
+ this._group._spiderfied = null;
+ },
+
+ _generatePointsCircle: function (count, centerPt) {
+ var circumference = this._group.options.spiderfyDistanceMultiplier * this._circleFootSeparation * (2 + count),
+ legLength = circumference / this._2PI, //radius from circumference
+ angleStep = this._2PI / count,
+ res = [],
+ i, angle;
+
+ legLength = Math.max(legLength, 35); // Minimum distance to get outside the cluster icon.
+
+ res.length = count;
+
+ for (i = 0; i < count; i++) { // Clockwise, like spiral.
+ angle = this._circleStartAngle + i * angleStep;
+ res[i] = new L.Point(centerPt.x + legLength * Math.cos(angle), centerPt.y + legLength * Math.sin(angle))._round();
+ }
+
+ return res;
+ },
+
+ _generatePointsSpiral: function (count, centerPt) {
+ var spiderfyDistanceMultiplier = this._group.options.spiderfyDistanceMultiplier,
+ legLength = spiderfyDistanceMultiplier * this._spiralLengthStart,
+ separation = spiderfyDistanceMultiplier * this._spiralFootSeparation,
+ lengthFactor = spiderfyDistanceMultiplier * this._spiralLengthFactor * this._2PI,
+ angle = 0,
+ res = [],
+ i;
+
+ res.length = count;
+
+ // Higher index, closer position to cluster center.
+ for (i = count; i >= 0; i--) {
+ // Skip the first position, so that we are already farther from center and we avoid
+ // being under the default cluster icon (especially important for Circle Markers).
+ if (i < count) {
+ res[i] = new L.Point(centerPt.x + legLength * Math.cos(angle), centerPt.y + legLength * Math.sin(angle))._round();
+ }
+ angle += separation / legLength + i * 0.0005;
+ legLength += lengthFactor / angle;
+ }
+ return res;
+ },
+
+ _noanimationUnspiderfy: function () {
+ var group = this._group,
+ map = group._map,
+ fg = group._featureGroup,
+ childMarkers = this.getAllChildMarkers(null, true),
+ m, i;
+
+ group._ignoreMove = true;
+
+ this.setOpacity(1);
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ m = childMarkers[i];
+
+ fg.removeLayer(m);
+
+ if (m._preSpiderfyLatlng) {
+ m.setLatLng(m._preSpiderfyLatlng);
+ delete m._preSpiderfyLatlng;
+ }
+ if (m.setZIndexOffset) {
+ m.setZIndexOffset(0);
+ }
+
+ if (m._spiderLeg) {
+ map.removeLayer(m._spiderLeg);
+ delete m._spiderLeg;
+ }
+ }
+
+ group.fire('unspiderfied', {
+ cluster: this,
+ markers: childMarkers
+ });
+ group._ignoreMove = false;
+ group._spiderfied = null;
+ }
+});
+
+//Non Animated versions of everything
+L.MarkerClusterNonAnimated = L.MarkerCluster.extend({
+ _animationSpiderfy: function (childMarkers, positions) {
+ var group = this._group,
+ map = group._map,
+ fg = group._featureGroup,
+ legOptions = this._group.options.spiderLegPolylineOptions,
+ i, m, leg, newPos;
+
+ group._ignoreMove = true;
+
+ // Traverse in ascending order to make sure that inner circleMarkers are on top of further legs. Normal markers are re-ordered by newPosition.
+ // The reverse order trick no longer improves performance on modern browsers.
+ for (i = 0; i < childMarkers.length; i++) {
+ newPos = map.layerPointToLatLng(positions[i]);
+ m = childMarkers[i];
+
+ // Add the leg before the marker, so that in case the latter is a circleMarker, the leg is behind it.
+ leg = new L.Polyline([this._latlng, newPos], legOptions);
+ map.addLayer(leg);
+ m._spiderLeg = leg;
+
+ // Now add the marker.
+ m._preSpiderfyLatlng = m._latlng;
+ m.setLatLng(newPos);
+ if (m.setZIndexOffset) {
+ m.setZIndexOffset(1000000); //Make these appear on top of EVERYTHING
+ }
+
+ fg.addLayer(m);
+ }
+ this.setOpacity(0.3);
+
+ group._ignoreMove = false;
+ group.fire('spiderfied', {
+ cluster: this,
+ markers: childMarkers
+ });
+ },
+
+ _animationUnspiderfy: function () {
+ this._noanimationUnspiderfy();
+ }
+});
+
+//Animated versions here
+L.MarkerCluster.include({
+
+ _animationSpiderfy: function (childMarkers, positions) {
+ var me = this,
+ group = this._group,
+ map = group._map,
+ fg = group._featureGroup,
+ thisLayerLatLng = this._latlng,
+ thisLayerPos = map.latLngToLayerPoint(thisLayerLatLng),
+ svg = L.Path.SVG,
+ legOptions = L.extend({}, this._group.options.spiderLegPolylineOptions), // Copy the options so that we can modify them for animation.
+ finalLegOpacity = legOptions.opacity,
+ i, m, leg, legPath, legLength, newPos;
+
+ if (finalLegOpacity === undefined) {
+ finalLegOpacity = L.MarkerClusterGroup.prototype.options.spiderLegPolylineOptions.opacity;
+ }
+
+ if (svg) {
+ // If the initial opacity of the spider leg is not 0 then it appears before the animation starts.
+ legOptions.opacity = 0;
+
+ // Add the class for CSS transitions.
+ legOptions.className = (legOptions.className || '') + ' leaflet-cluster-spider-leg';
+ } else {
+ // Make sure we have a defined opacity.
+ legOptions.opacity = finalLegOpacity;
+ }
+
+ group._ignoreMove = true;
+
+ // Add markers and spider legs to map, hidden at our center point.
+ // Traverse in ascending order to make sure that inner circleMarkers are on top of further legs. Normal markers are re-ordered by newPosition.
+ // The reverse order trick no longer improves performance on modern browsers.
+ for (i = 0; i < childMarkers.length; i++) {
+ m = childMarkers[i];
+
+ newPos = map.layerPointToLatLng(positions[i]);
+
+ // Add the leg before the marker, so that in case the latter is a circleMarker, the leg is behind it.
+ leg = new L.Polyline([thisLayerLatLng, newPos], legOptions);
+ map.addLayer(leg);
+ m._spiderLeg = leg;
+
+ // Explanations: https://jakearchibald.com/2013/animated-line-drawing-svg/
+ // In our case the transition property is declared in the CSS file.
+ if (svg) {
+ legPath = leg._path;
+ legLength = legPath.getTotalLength() + 0.1; // Need a small extra length to avoid remaining dot in Firefox.
+ legPath.style.strokeDasharray = legLength; // Just 1 length is enough, it will be duplicated.
+ legPath.style.strokeDashoffset = legLength;
+ }
+
+ // If it is a marker, add it now and we'll animate it out
+ if (m.setZIndexOffset) {
+ m.setZIndexOffset(1000000); // Make normal markers appear on top of EVERYTHING
+ }
+ if (m.clusterHide) {
+ m.clusterHide();
+ }
+
+ // Vectors just get immediately added
+ fg.addLayer(m);
+
+ if (m._setPos) {
+ m._setPos(thisLayerPos);
+ }
+ }
+
+ group._forceLayout();
+ group._animationStart();
+
+ // Reveal markers and spider legs.
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ newPos = map.layerPointToLatLng(positions[i]);
+ m = childMarkers[i];
+
+ //Move marker to new position
+ m._preSpiderfyLatlng = m._latlng;
+ m.setLatLng(newPos);
+
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+
+ // Animate leg (animation is actually delegated to CSS transition).
+ if (svg) {
+ leg = m._spiderLeg;
+ legPath = leg._path;
+ legPath.style.strokeDashoffset = 0;
+ //legPath.style.strokeOpacity = finalLegOpacity;
+ leg.setStyle({opacity: finalLegOpacity});
+ }
+ }
+ this.setOpacity(0.3);
+
+ group._ignoreMove = false;
+
+ setTimeout(function () {
+ group._animationEnd();
+ group.fire('spiderfied', {
+ cluster: me,
+ markers: childMarkers
+ });
+ }, 200);
+ },
+
+ _animationUnspiderfy: function (zoomDetails) {
+ var me = this,
+ group = this._group,
+ map = group._map,
+ fg = group._featureGroup,
+ thisLayerPos = zoomDetails ? map._latLngToNewLayerPoint(this._latlng, zoomDetails.zoom, zoomDetails.center) : map.latLngToLayerPoint(this._latlng),
+ childMarkers = this.getAllChildMarkers(null, true),
+ svg = L.Path.SVG,
+ m, i, leg, legPath, legLength, nonAnimatable;
+
+ group._ignoreMove = true;
+ group._animationStart();
+
+ //Make us visible and bring the child markers back in
+ this.setOpacity(1);
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ m = childMarkers[i];
+
+ //Marker was added to us after we were spiderfied
+ if (!m._preSpiderfyLatlng) {
+ continue;
+ }
+
+ //Close any popup on the marker first, otherwise setting the location of the marker will make the map scroll
+ m.closePopup();
+
+ //Fix up the location to the real one
+ m.setLatLng(m._preSpiderfyLatlng);
+ delete m._preSpiderfyLatlng;
+
+ //Hack override the location to be our center
+ nonAnimatable = true;
+ if (m._setPos) {
+ m._setPos(thisLayerPos);
+ nonAnimatable = false;
+ }
+ if (m.clusterHide) {
+ m.clusterHide();
+ nonAnimatable = false;
+ }
+ if (nonAnimatable) {
+ fg.removeLayer(m);
+ }
+
+ // Animate the spider leg back in (animation is actually delegated to CSS transition).
+ if (svg) {
+ leg = m._spiderLeg;
+ legPath = leg._path;
+ legLength = legPath.getTotalLength() + 0.1;
+ legPath.style.strokeDashoffset = legLength;
+ leg.setStyle({opacity: 0});
+ }
+ }
+
+ group._ignoreMove = false;
+
+ setTimeout(function () {
+ //If we have only <= one child left then that marker will be shown on the map so don't remove it!
+ var stillThereChildCount = 0;
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ m = childMarkers[i];
+ if (m._spiderLeg) {
+ stillThereChildCount++;
+ }
+ }
+
+
+ for (i = childMarkers.length - 1; i >= 0; i--) {
+ m = childMarkers[i];
+
+ if (!m._spiderLeg) { //Has already been unspiderfied
+ continue;
+ }
+
+ if (m.clusterShow) {
+ m.clusterShow();
+ }
+ if (m.setZIndexOffset) {
+ m.setZIndexOffset(0);
+ }
+
+ if (stillThereChildCount > 1) {
+ fg.removeLayer(m);
+ }
+
+ map.removeLayer(m._spiderLeg);
+ delete m._spiderLeg;
+ }
+ group._animationEnd();
+ group.fire('unspiderfied', {
+ cluster: me,
+ markers: childMarkers
+ });
+ }, 200);
+ }
+});
+
+
+L.MarkerClusterGroup.include({
+ //The MarkerCluster currently spiderfied (if any)
+ _spiderfied: null,
+
+ unspiderfy: function () {
+ this._unspiderfy.apply(this, arguments);
+ },
+
+ _spiderfierOnAdd: function () {
+ this._map.on('click', this._unspiderfyWrapper, this);
+
+ if (this._map.options.zoomAnimation) {
+ this._map.on('zoomstart', this._unspiderfyZoomStart, this);
+ }
+ //Browsers without zoomAnimation or a big zoom don't fire zoomstart
+ this._map.on('zoomend', this._noanimationUnspiderfy, this);
+
+ if (!L.Browser.touch) {
+ this._map.getRenderer(this);
+ //Needs to happen in the pageload, not after, or animations don't work in webkit
+ // http://stackoverflow.com/questions/8455200/svg-animate-with-dynamically-added-elements
+ //Disable on touch browsers as the animation messes up on a touch zoom and isn't very noticable
+ }
+ },
+
+ _spiderfierOnRemove: function () {
+ this._map.off('click', this._unspiderfyWrapper, this);
+ this._map.off('zoomstart', this._unspiderfyZoomStart, this);
+ this._map.off('zoomanim', this._unspiderfyZoomAnim, this);
+ this._map.off('zoomend', this._noanimationUnspiderfy, this);
+
+ //Ensure that markers are back where they should be
+ // Use no animation to avoid a sticky leaflet-cluster-anim class on mapPane
+ this._noanimationUnspiderfy();
+ },
+
+ //On zoom start we add a zoomanim handler so that we are guaranteed to be last (after markers are animated)
+ //This means we can define the animation they do rather than Markers doing an animation to their actual location
+ _unspiderfyZoomStart: function () {
+ if (!this._map) { //May have been removed from the map by a zoomEnd handler
+ return;
+ }
+
+ this._map.on('zoomanim', this._unspiderfyZoomAnim, this);
+ },
+
+ _unspiderfyZoomAnim: function (zoomDetails) {
+ //Wait until the first zoomanim after the user has finished touch-zooming before running the animation
+ if (L.DomUtil.hasClass(this._map._mapPane, 'leaflet-touching')) {
+ return;
+ }
+
+ this._map.off('zoomanim', this._unspiderfyZoomAnim, this);
+ this._unspiderfy(zoomDetails);
+ },
+
+ _unspiderfyWrapper: function () {
+ /// <summary>_unspiderfy but passes no arguments</summary>
+ this._unspiderfy();
+ },
+
+ _unspiderfy: function (zoomDetails) {
+ if (this._spiderfied) {
+ this._spiderfied.unspiderfy(zoomDetails);
+ }
+ },
+
+ _noanimationUnspiderfy: function () {
+ if (this._spiderfied) {
+ this._spiderfied._noanimationUnspiderfy();
+ }
+ },
+
+ //If the given layer is currently being spiderfied then we unspiderfy it so it isn't on the map anymore etc
+ _unspiderfyLayer: function (layer) {
+ if (layer._spiderLeg) {
+ this._featureGroup.removeLayer(layer);
+
+ if (layer.clusterShow) {
+ layer.clusterShow();
+ }
+ //Position will be fixed up immediately in _animationUnspiderfy
+ if (layer.setZIndexOffset) {
+ layer.setZIndexOffset(0);
+ }
+
+ this._map.removeLayer(layer._spiderLeg);
+ delete layer._spiderLeg;
+ }
+ }
+});
+
+/**
+ * Adds 1 public method to MCG and 1 to L.Marker to facilitate changing
+ * markers' icon options and refreshing their icon and their parent clusters
+ * accordingly (case where their iconCreateFunction uses data of childMarkers
+ * to make up the cluster icon).
+ */
+
+
+L.MarkerClusterGroup.include({
+ /**
+ * Updates the icon of all clusters which are parents of the given marker(s).
+ * In singleMarkerMode, also updates the given marker(s) icon.
+ * @param layers L.MarkerClusterGroup|L.LayerGroup|Array(L.Marker)|Map(L.Marker)|
+ * L.MarkerCluster|L.Marker (optional) list of markers (or single marker) whose parent
+ * clusters need to be updated. If not provided, retrieves all child markers of this.
+ * @returns {L.MarkerClusterGroup}
+ */
+ refreshClusters: function (layers) {
+ if (!layers) {
+ layers = this._topClusterLevel.getAllChildMarkers();
+ } else if (layers instanceof L.MarkerClusterGroup) {
+ layers = layers._topClusterLevel.getAllChildMarkers();
+ } else if (layers instanceof L.LayerGroup) {
+ layers = layers._layers;
+ } else if (layers instanceof L.MarkerCluster) {
+ layers = layers.getAllChildMarkers();
+ } else if (layers instanceof L.Marker) {
+ layers = [layers];
+ } // else: must be an Array(L.Marker)|Map(L.Marker)
+ this._flagParentsIconsNeedUpdate(layers);
+ this._refreshClustersIcons();
+
+ // In case of singleMarkerMode, also re-draw the markers.
+ if (this.options.singleMarkerMode) {
+ this._refreshSingleMarkerModeMarkers(layers);
+ }
+
+ return this;
+ },
+
+ /**
+ * Simply flags all parent clusters of the given markers as having a "dirty" icon.
+ * @param layers Array(L.Marker)|Map(L.Marker) list of markers.
+ * @private
+ */
+ _flagParentsIconsNeedUpdate: function (layers) {
+ var id, parent;
+
+ // Assumes layers is an Array or an Object whose prototype is non-enumerable.
+ for (id in layers) {
+ // Flag parent clusters' icon as "dirty", all the way up.
+ // Dumb process that flags multiple times upper parents, but still
+ // much more efficient than trying to be smart and make short lists,
+ // at least in the case of a hierarchy following a power law:
+ // http://jsperf.com/flag-nodes-in-power-hierarchy/2
+ parent = layers[id].__parent;
+ while (parent) {
+ parent._iconNeedsUpdate = true;
+ parent = parent.__parent;
+ }
+ }
+ },
+
+ /**
+ * Re-draws the icon of the supplied markers.
+ * To be used in singleMarkerMode only.
+ * @param layers Array(L.Marker)|Map(L.Marker) list of markers.
+ * @private
+ */
+ _refreshSingleMarkerModeMarkers: function (layers) {
+ var id, layer;
+
+ for (id in layers) {
+ layer = layers[id];
+
+ // Make sure we do not override markers that do not belong to THIS group.
+ if (this.hasLayer(layer)) {
+ // Need to re-create the icon first, then re-draw the marker.
+ layer.setIcon(this._overrideMarkerIcon(layer));
+ }
+ }
+ }
+});
+
+L.Marker.include({
+ /**
+ * Updates the given options in the marker's icon and refreshes the marker.
+ * @param options map object of icon options.
+ * @param directlyRefreshClusters boolean (optional) true to trigger
+ * MCG.refreshClustersOf() right away with this single marker.
+ * @returns {L.Marker}
+ */
+ refreshIconOptions: function (options, directlyRefreshClusters) {
+ var icon = this.options.icon;
+
+ L.setOptions(icon, options);
+
+ this.setIcon(icon);
+
+ // Shortcut to refresh the associated MCG clusters right away.
+ // To be used when refreshing a single marker.
+ // Otherwise, better use MCG.refreshClusters() once at the end with
+ // the list of modified markers.
+ if (directlyRefreshClusters && this.__parent) {
+ this.__parent._group.refreshClusters(this);
+ }
+
+ return this;
+ }
+});
+
+exports.MarkerClusterGroup = MarkerClusterGroup;
+exports.MarkerCluster = MarkerCluster;
+
+})));
+//# sourceMappingURL=leaflet.markercluster-src.js.map
fnp / wolnelektury.git / blobdiff