landers.base/src/loader.js

landers.base

; (function (window, $, Landers) {
    Landers = Landers || {};
    Landers.loader = {
        delay:300, counts:0,
        is_ready:function(o){
            return !o.readyState ||
                    o.readyState === 'loaded' ||
                    o.readyState === 'complete';
        },
        onload_callback:function(o, callback){
            var me = this;
            if (navigator.userAgent.toLowerCase().match(/apple/) === null) {
                o.onload = o.onreadystatechange = function() {
                    if (me.is_ready(o)) {
                        o.onload = o.onreadystatechange = null;
                        callback && setTimeout(callback , me.delay);
                    }
                };
            } else callback && setTimeout(callback , me.delay);
        },
        js:function(urls, callback, opts){//opts = {is_jq, win}
            opts = opts || {};var load;
            if (!Landers.utils.is_array(urls)) urls = [urls];
            if (opts.is_jq === false || !window.$ || !$.getScript) {
                var me = this, owin = opts.win || window, doc = owin.document;
                var ohead = doc.getElementsByTagName('head').item(0);
                load = function(url, _callback){
                    var o = doc.createElement('script');
                    var src = !Landers.env.cache ? Landers.url.qs.set( url, {_:Math.random()} ) : url;
                    o.setAttribute("src", src);
                    ohead.appendChild(o);
                    me.onload_callback(o, _callback);
                    return o;
                };
            } else {
                $.ajaxSetup({cache:!!Landers.env.cache});
                load = function(url, _callback) {
                    $.getScript(url, _callback);
                    return $();
                };
            }
            if (urls.length == 1) {
                return load(urls[0], callback);
            } else {
                (function(i){
                    var self = arguments.callee;
                    var url = urls[i];
                    if (url) {
                        load(url, function(){
                            self(i+1);
                        });
                    } else {
                        callback && callback();
                    }
                })(0);
            }
        },
        jsm:function(mods, callback, opts){//opts = {is_jq, win}
            if (!Landers.dynamicLoad) return callback && callback();
            var is_css = opts === true; //兼容老式（第三参数为 has_css）调用
            opts = is_css ? {} : (opts || {});
            opts.checks = opts.checks || [];
            if (!Landers.utils.is_array(opts.checks)) opts.checks = [opts.checks];
            var me = this, ret = {modules:[], css:$(), js:$()};
            var script = Landers.env.path.script;
            var that = this;

            var loadmod = function(mod, _callback) {
                var a = mod.split(',');
                var modname = a[0], css = is_css || a[1], force = a[2];
                css = css === '0' || css === 'false' || css ==='' ? false : css;
                var path = script + modname + '/';
                var jsurl = path + modname + '.js';
                var __callback = function(){
                    setTimeout(function(){
                        if (_callback) _callback();
                    }, 200);
                };
                var onload = function(){
                    var module = Landers[modname];
                    if (!module) module = Landers[modname] = {};
                    ret.modules.push(module);
                    module.mod_path = path;
                    if (Landers.utils.is_fun(module.mod_init)) {
                        module.mod_init(__callback);
                    } else __callback();
                };

                if (!Landers[modname] || force) {
                    //console.log('loading module [' + modname + ']');
                    if (css) {
                        var cssurl = path + (Landers.utils.to.bool(css) ? modname + '.css' : (css.lastIndexOf('.css') > -1 ? css : (css + '/' + modname + '.css')));
                        ret.css = ret.css.add(me.css(cssurl, function(){
                            ret.js = ret.js.add(me.js(jsurl, onload, opts));
                        }, opts));
                    } else {
                        ret.js.push(me.js(jsurl, onload, opts));
                    }
                } else {
                    ret.modules.push(Landers[modname]);
                    __callback();
                }
            };

            if (!Landers.utils.is_array(mods)) mods = [mods];
            var is_ispin = (function(){
                var bool = false;
                for (var i=0; i<mods.length-1; i++) {
                    var a = mods[i].split(',');
                    bool = bool || !Landers[a[0]];
                }
                return bool;
            })();
            (function(i){
                var self = arguments.callee;
                if (i < mods.length) {
                    if (opts.checks[i]) {
                        self(i+1); that.counts++;
                    } else {
                        loadmod(mods[i], function(){
                            self(i+1); that.counts++;
                        });
                    }
                } else {
                    callback && callback.call(mods.length == 1 ? ret.modules[0] : ret, ret);
                }
            })(0);
        },
        css:function(url, callback, opts){ //opts: win
            opts = opts || {};
            var owin = opts.win || window; var doc = owin.document;
            var ohead = doc.getElementsByTagName('head').item(0);
            var me = this, o = doc.createElement('link');
            var href = !Landers.env.cache && Landers.url ? Landers.url.qs.set(url, {_:Math.random()}) : url;
            o.setAttribute("href", href);
            o.setAttribute("rel", "Stylesheet");
            o.setAttribute("type", "text/css");
            ohead.appendChild(o);
            me.onload_callback(o, callback); return $(o);
        },
        cssm:function(mods, callback){
            if (!Landers.dynamicLoad) return callback();
            var me = this;
            if (Landers.utils.is_string(mods)) mods = mods.split(',');
            (function(i){
                var self = arguments.callee;
                var _callback = i > mods.length ? function(){self(i+1);} : callback;
                var mod = $.trim(mods[i]);
                me.css(Landers.env.path.ui.css + mod + '/' + mod + '.css', _callback);
            })(0);
        }
    };
})(this, jQuery, Landers);