Allow to load multiple tinyMCE configs

gistfile1.js

var tinyMCE_GZ_shim = tinyMCE_GZ_shim || (function() {
"use strict";

    var tinyMCE_GZ = window.tinyMCE_GZ;
    var tinyMCE = null;

    var initialized = false;
    var config_gz = [];
    var config_tiny = {};

    var create_shim = function(t, s) {
        var shim, k;

        if (Object.create) {
            shim = Object.create(t);
            for (k in s) {
                if (s.hasOwnProperty(k)) {
                    shim[k] = s[k];
                }
            }
        } else {
            shim = s;
            shim.__proto__ = t;
        }

        return shim;
    }

    var array_unique = function(arr) {
        var unique = [];
        var i, total;
        arr = arr.sort();

        for (i=0, total=arr.length; i<total; i++) {
            if (arr[i + 1] != arr[i]) {
                unique.push(arr[i]);
            }
        }
        return unique;
    }

    var tinyMCE_GZ_shim = {
        init: function(s) {
            config_gz.push(s)
        }
    }

    var tinyMCE_shim = {
        init: function(s) {
            var elements = s.elements.split(',');
            var i, total;

            for (i=0, total=elements.length; i<total; i++) {
                config_tiny[elements[i]] = s;
            }
        },
        execCommand: function(c, u, v) {
            initialize();

            if (tinyMCE && typeof config_tiny[v] != 'undefined') {
                tinyMCE.init(config_tiny[v]);
                tinyMCE.execCommand(c, u, v);
            }
        }
    }

    var initialize = function() {
        if (initialized) return;

        var settings = {plugins:[], themes:[], languages:[]};
        var i, s, k, total;

        for (i=0, total=config_gz.length;i<total; i++) {
            s = config_gz[i];
            for (k in s) {
                if (k == 'plugins' || k == 'themes' || k == 'languages') {
                    [].push.apply(settings[k], s[k].split(','));
                }
                else if (s.hasOwnProperty(k)) {
                    settings[k] = s[k];
                }
            }
        }

        settings.plugins = array_unique(settings.plugins).join(',');
        settings.themes = array_unique(settings.themes).join(',');
        settings.languages = array_unique(settings.languages).join(',');

        // load tinyMCE
        tinyMCE_GZ.init(settings);

        tinyMCE = window.tinyMCE;
        tinyMCE_shim = create_shim(tinyMCE, tinyMCE_shim);
        window.tinyMCE = tinyMCE_shim;

        initialized = true;
    }

    window.tinyMCE = tinyMCE_shim;
    tinyMCE_GZ_shim = create_shim(tinyMCE_GZ, tinyMCE_GZ_shim);

    return tinyMCE_GZ_shim;
})();

window.tinyMCE_GZ = tinyMCE_GZ_shim;