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node_modules/leaflet/src/control/Control.Attribution.js

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+
+import {Control} from './Control';
+import {Map} from '../map/Map';
+import * as Util from '../core/Util';
+import * as DomEvent from '../dom/DomEvent';
+import * as DomUtil from '../dom/DomUtil';
+import Browser from '../core/Browser';
+
+var ukrainianFlag = '<svg aria-hidden="true" xmlns="http://www.w3.org/2000/svg" width="12" height="8" viewBox="0 0 12 8" class="leaflet-attribution-flag"><path fill="#4C7BE1" d="M0 0h12v4H0z"/><path fill="#FFD500" d="M0 4h12v3H0z"/><path fill="#E0BC00" d="M0 7h12v1H0z"/></svg>';
+
+
+/*
+ * @class Control.Attribution
+ * @aka L.Control.Attribution
+ * @inherits Control
+ *
+ * The attribution control allows you to display attribution data in a small text box on a map. It is put on the map by default unless you set its [`attributionControl` option](#map-attributioncontrol) to `false`, and it fetches attribution texts from layers with the [`getAttribution` method](#layer-getattribution) automatically. Extends Control.
+ */
+
+export var Attribution = Control.extend({
+	// @section
+	// @aka Control.Attribution options
+	options: {
+		position: 'bottomright',
+
+		// @option prefix: String|false = 'Leaflet'
+		// The HTML text shown before the attributions. Pass `false` to disable.
+		prefix: '<a href="https://leafletjs.com" title="A JavaScript library for interactive maps">' + (Browser.inlineSvg ? ukrainianFlag + ' ' : '') + 'Leaflet</a>'
+	},
+
+	initialize: function (options) {
+		Util.setOptions(this, options);
+
+		this._attributions = {};
+	},
+
+	onAdd: function (map) {
+		map.attributionControl = this;
+		this._container = DomUtil.create('div', 'leaflet-control-attribution');
+		DomEvent.disableClickPropagation(this._container);
+
+		// TODO ugly, refactor
+		for (var i in map._layers) {
+			if (map._layers[i].getAttribution) {
+				this.addAttribution(map._layers[i].getAttribution());
+			}
+		}
+
+		this._update();
+
+		map.on('layeradd', this._addAttribution, this);
+
+		return this._container;
+	},
+
+	onRemove: function (map) {
+		map.off('layeradd', this._addAttribution, this);
+	},
+
+	_addAttribution: function (ev) {
+		if (ev.layer.getAttribution) {
+			this.addAttribution(ev.layer.getAttribution());
+			ev.layer.once('remove', function () {
+				this.removeAttribution(ev.layer.getAttribution());
+			}, this);
+		}
+	},
+
+	// @method setPrefix(prefix: String|false): this
+	// The HTML text shown before the attributions. Pass `false` to disable.
+	setPrefix: function (prefix) {
+		this.options.prefix = prefix;
+		this._update();
+		return this;
+	},
+
+	// @method addAttribution(text: String): this
+	// Adds an attribution text (e.g. `'&copy; OpenStreetMap contributors'`).
+	addAttribution: function (text) {
+		if (!text) { return this; }
+
+		if (!this._attributions[text]) {
+			this._attributions[text] = 0;
+		}
+		this._attributions[text]++;
+
+		this._update();
+
+		return this;
+	},
+
+	// @method removeAttribution(text: String): this
+	// Removes an attribution text.
+	removeAttribution: function (text) {
+		if (!text) { return this; }
+
+		if (this._attributions[text]) {
+			this._attributions[text]--;
+			this._update();
+		}
+
+		return this;
+	},
+
+	_update: function () {
+		if (!this._map) { return; }
+
+		var attribs = [];
+
+		for (var i in this._attributions) {
+			if (this._attributions[i]) {
+				attribs.push(i);
+			}
+		}
+
+		var prefixAndAttribs = [];
+
+		if (this.options.prefix) {
+			prefixAndAttribs.push(this.options.prefix);
+		}
+		if (attribs.length) {
+			prefixAndAttribs.push(attribs.join(', '));
+		}
+
+		this._container.innerHTML = prefixAndAttribs.join(' <span aria-hidden="true">|</span> ');
+	}
+});
+
+// @namespace Map
+// @section Control options
+// @option attributionControl: Boolean = true
+// Whether a [attribution control](#control-attribution) is added to the map by default.
+Map.mergeOptions({
+	attributionControl: true
+});
+
+Map.addInitHook(function () {
+	if (this.options.attributionControl) {
+		new Attribution().addTo(this);
+	}
+});
+
+// @namespace Control.Attribution
+// @factory L.control.attribution(options: Control.Attribution options)
+// Creates an attribution control.
+export var attribution = function (options) {
+	return new Attribution(options);
+};