[Pkg-javascript-commits] [leaflet-markercluster] 104/219: first commit

[Jonas Smedegaard]

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js pushed a commit to branch master
in repository leaflet-markercluster.

commit afc132d210380c789d7ec6ba20df0ea803df20c4
Author: ghybs <ghybs1 at gmail.com>
Date:   Fri Oct 2 01:20:54 2015 +0400

    first commit
---
 MarkerClusterGroup.Refresh.js | 76 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/MarkerClusterGroup.Refresh.js b/MarkerClusterGroup.Refresh.js
new file mode 100644
index 0000000..c2a76fa
--- /dev/null
+++ b/MarkerClusterGroup.Refresh.js
@@ -0,0 +1,76 @@
+/**
+ * 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).
+ * Should cover issues #561, #555, #535 and #498.
+ */
+
+L.MarkerClusterGroup.include({
+	/**
+	 * Updates all clusters (and their icon) which are parents of the given marker(s).
+	 * @param layers L.MarkerClusterGroup|L.LayerGroup|Array(L.Marker)|L.Marker
+	 * list of markers (or single marker) whose parent clusters need update.
+	 */
+	refreshClustersOf: function (layers) {
+		if (layers instanceof L.MarkerClusterGroup) {
+			layers = layers.getAllChildMarkers();
+		} else if (layers instanceof L.LayerGroup) {
+			layers = layers._layers;
+		} else if (layers instanceof L.Marker) {
+			layers = [layers];
+		}
+		this._flagParentsIconsNeedUpdate(layers);
+		this._refreshClustersIcons();
+	},
+
+	/**
+	 * 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 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.
+			// Dummy 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
+			parent = layers[id].__parent;
+			while (parent) {
+				parent._iconNeedsUpdate = true;
+				parent = parent.__parent;
+			}
+		}
+	},
+
+	/**
+	 * 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();
+			}
+		});
+	}
+});
+
+L.Marker.include({
+	/**
+	 * Updates the given options in the marker's icon and refreshes the marker.
+	 * @param options map object of icon options.
+	 */
+	refreshIconWithOptions: function (options) {
+		var icon = this.options.icon;
+
+		L.setOptions(icon, options);
+
+		this.setIcon(icon);
+	}
+});

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