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adapter.js
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adapter.js
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/**
* mini define/require mplementation for old web page
* transformed AMD module into traditional module pattern
* demo:
* see http://ozjs.org for details
*
* Copyright (C) 2010-2012, Dexter.Yy, MIT License
* vim: et:ts=4:sw=4:sts=4
*/
// 这个define的实现会让amd模块声明变成传统的module pattern
function define(fullname, deps, block){
if (!block) {
if (deps) {
block = deps;
} else {
block = fullname;
fullname = [];
}
if (typeof fullname !== 'string') {
deps = fullname;
fullname = "";
} else {
deps = [];
}
}
var callee = define,
len = deps.length,
exports = {},
opt = callee._global_exports[fullname] || {},
current_ns = callee._current_ns = opt.ns
|| callee._current_ns || callee._ns || 'window';
deps = ((/^function\s*\(([^\)]*)\)/
.exec(block.toString()) || [])[1] || '')
.replace(/\s+/g, '').split(',');
deps.length = len;
var args = deps.map(function(name){
return (window[current_ns] || {})[name];
});
args.push(function(reqs, callback){
if (callback) {
require(reqs, callback);
} else {
return (callee._global_exports[reqs] || {}).exports;
}
});
args.push(exports);
exports = opt.exports = block.apply(this, args) || exports;
if (opt.names) {
opt.names.forEach(function(name){
name = name.split('.');
var context = window, i = name[0];
if (name[1]) {
context = context[i] = context[i] || {};
i = name[1];
}
context[i] = exports;
});
}
callee._current_ns = null;
}
// require的实现跟define一样,不过是异步的
function require(reqs){
if (typeof reqs === 'string') {
reqs = [reqs];
}
var args = arguments;
setTimeout(function(){
define.apply(this, args);
}, 0);
}
define._global_exports = {};
// 为模块设置命名空间,既可以避免产生全局变量,
// 也可以隔离不同体系的模块(比如'mod/event'和'jquery/event'),避免命名冲突
define.ns = function(mid, namespace){
if (!namespace) {
this._ns = mid;
} else {
var opt = this._global_exports;
if (!opt[mid]) {
opt[mid] = {
names: []
};
}
opt[mid].ns = namespace;
}
};
// 将模块的exports映射到全局命名空间下,让没有封装到amd模块里的代码也可以使用
define.config = function(mid, vars){
if (typeof mid === 'object') {
for (var i in mid) {
this.config(i, mid[i]);
}
return;
}
var opt = this._global_exports;
if (!opt[mid]) {
opt[mid] = {
ns: this._ns,
names: []
};
}
if (typeof vars === 'string') {
vars = [vars];
}
[].push.apply(opt[mid].names, vars);
};
require.config = function(){};