EPSG2154.js

import L from "leaflet";
import Config from "../../Common/Utils/Config";
import Register from "../../Common/Utils/Register";

/**
 * @classdesc
 *
 * Leaflet Lambert 93 (EPSG:2154) <a href="http://leafletjs.com/reference.html#icrs" target="_blank">ICRS compatible</a> definition.
 *
 * @namespace
 * @alias L.geoportalCRS.EPSG2154
 * @example
 *  var map = L.Map('divmap', {
 *    crs : L.geoportalCRS.EPSG2154
 *  }).setView();
 *  var lyr = L.geoportalLayer.WMTS(
 *    {
 *      layer : "ORTHOIMAGERY.ORTHOPHOTOS.BDORTHO.L93"
 *    });
 *
 *  lyr.addTo(map); // ou map.addLayer(lyr);
 */
var EPSG2154 = {

    /**
     * instance
     *
     * @private
     */
    instance : null,

    /**
     * execution
     *
     * @returns {Object} instance
     * @private
     */
    build : function () {
        // singleton
        if (!this.instance) {
            var crs = new L.Proj.CRS("EPSG:2154",
                Register.get("EPSG:2154"), {
                    // FIXME issue de l'autoconf cf. nativeResolutions
                    resolutions : this._getResolutions(),
                    origin : this._getOrigin()
                });
            this.instance = crs;
        }

        return this.instance;
    },

    /**
     * resolutions
     *
     * @returns {Number[]} resolutions
     * @private
     */
    _getResolutions : function () {
        var resolutions = [];
        // resolutions issues de l'autoconf
        if (Config.isConfigLoaded()) {
            var o = Config.getTileMatrix("LAMB93");
            resolutions = o.nativeResolutions;
        }

        if (resolutions.length) {
            return resolutions;
        }

        // resolution par defaut
        return [
            104579.22454989408,
            52277.53235379051,
            26135.487078595408,
            13066.891381800004,
            6533.228604113456,
            3266.5595244626675,
            1633.2660045974187,
            816.6295549860224,
            408.31391467683596,
            204.15674151090204,
            102.07831678324082,
            51.0391448966112,
            25.519569074269395,
            12.759783693647506,
            6.379891635966491,
            3.18994576530532,
            1.5949728694977277,
            0.7974864315474559,
            0.398743214900604,
            0.19937160727567999,
            0.099685803696052,
            0.049842901818919996
        ];
    },

    /**
     * origine
     *
     * @returns {Number[]} origin
     * @private
     */
    _getOrigin : function () {
        return [0, 12000000];
    }
};

export default EPSG2154;