/*
* L.Control.Attribution is used for displaying attribution on the map (added by default).
*/
L.Control.Attribution = L.Control.extend({
options: {
position: 'bottomright',
prefix: '<a href="http://leafletjs.com" title="A JS library for interactive maps">Leaflet</a>'
},
initialize: function (options) {
L.setOptions(this, options);
this._attributions = {};
},
onAdd: function (map) {
this._container = L.DomUtil.create('div', 'leaflet-control-attribution');
L.DomEvent.disableClickPropagation(this._container);
map
.on('layeradd', this._onLayerAdd, this)
.on('layerremove', this._onLayerRemove, this);
this._update();
return this._container;
},
onRemove: function (map) {
map
.off('layeradd', this._onLayerAdd)
.off('layerremove', this._onLayerRemove);
},
setPrefix: function (prefix) {
this.options.prefix = prefix;
this._update();
return this;
},
addAttribution: function (text) {
if (!text) { return; }
if (!this._attributions[text]) {
this._attributions[text] = 0;
}
this._attributions[text]++;
this._update();
return this;
},
removeAttribution: function (text) {
if (!text) { return; }
if (this._attributions[text]) {
this._attributions[text]--;
this._update();
}
return this;
},
_update: function () {
Iif (!this._map) { return; }
var attribs = [];
for (var i in this._attributions) {
if (this._attributions.hasOwnProperty(i) && this._attributions[i]) {
attribs.push(i);
}
}
var prefixAndAttribs = [];
Eif (this.options.prefix) {
prefixAndAttribs.push(this.options.prefix);
}
if (attribs.length) {
prefixAndAttribs.push(attribs.join(', '));
}
this._container.innerHTML = prefixAndAttribs.join(' | ');
},
_onLayerAdd: function (e) {
if (e.layer.getAttribution) {
this.addAttribution(e.layer.getAttribution());
}
},
_onLayerRemove: function (e) {
Iif (e.layer.getAttribution) {
this.removeAttribution(e.layer.getAttribution());
}
}
});
L.Map.mergeOptions({
attributionControl: true
});
L.Map.addInitHook(function () {
Eif (this.options.attributionControl) {
this.attributionControl = (new L.Control.Attribution()).addTo(this);
}
});
L.control.attribution = function (options) {
return new L.Control.Attribution(options);
};
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