/*---------------------------------------start-------------------------------*/
req({}); // num == 1 跳到 num == 2
//Exports some context-sensitive methods on global require.
each([
'toUrl',
'undef',
'defined',
'specified'
], function (prop) {
//Reference from contexts instead of early binding to default context,
//so that during builds, the latest instance of the default context
//with its config gets used.
req[prop] = function () {
var ctx = contexts[defContextName];
return ctx.require[prop].apply(ctx, arguments);
};
});
if (isBrowser && !cfg.skipDataMain) {} //req.deps[mainscript]
//Set up with config info.
req(cfg); //最后启动。 按照之前写的num 一步一步的去加载。
/*----------------------------------------start---------------------------------*/
//第一次 num == 2
//params
var deps = {},
callback = undefined,
errback = undefined,
optional = undefined;
//--------------声明------------------
var context = undefined,
config = undefined,
contextName = defContextName;
//-------------判断---------------
config = {};
deps = [];
//------------判断--------------
context = contexts[contextName] = req.s.newContext(contextName); //跳到num ==3
//时间上就是执行 localRequire(deps, callback, errback);
context.require(deps, callback, errback); //跳到 num ==5
/*---------------------------------------end-------------------------------*/
/*
*
*
* */
/*---------------------------------------start-------------------------------*/
//-----------------------进入核心函数--------------------------
//第一次
//function newContext(contextName) num == 3
context = {
config: config,
contextName: contextName,
registry: registry,
defined: defined,
urlFetched: urlFetched,
defQueue: defQueue,
defQueueMap: {},
Module: Module,
makeModuleMap: makeModuleMap,
nextTick: req.nextTick,
onError: onError,
/**
* Set a configuration for the context.
* @param {Object} cfg config object to integrate.
*/
configure: function (cfg) {
//Make sure the baseUrl ends in a slash.
if (cfg.baseUrl) {
if (cfg.baseUrl.charAt(cfg.baseUrl.length - 1) !== '/') {
cfg.baseUrl += '/';
}
}
// Convert old style urlArgs string to a function.
if (typeof cfg.urlArgs === 'string') {
var urlArgs = cfg.urlArgs;
cfg.urlArgs = function(id, url) {
return (url.indexOf('?') === -1 ? '?' : '&') + urlArgs;
};
}
//Save off the paths since they require special processing,
//they are additive.
var shim = config.shim,
objs = {
paths: true,
bundles: true,
config: true,
map: true
};
eachProp(cfg, function (value, prop) {
if (objs[prop]) {
if (!config[prop]) {
config[prop] = {};
}
mixin(config[prop], value, true, true);
} else {
config[prop] = value;
}
});
//Reverse map the bundles
if (cfg.bundles) {
eachProp(cfg.bundles, function (value, prop) {
each(value, function (v) {
if (v !== prop) {
bundlesMap[v] = prop;
}
});
});
}
//Merge shim
if (cfg.shim) {
eachProp(cfg.shim, function (value, id) {
//Normalize the structure
if (isArray(value)) {
value = {
deps: value
};
}
if ((value.exports || value.init) && !value.exportsFn) {
value.exportsFn = context.makeShimExports(value);
}
shim[id] = value;
});
config.shim = shim;
}
//Adjust packages if necessary.
if (cfg.packages) {
each(cfg.packages, function (pkgObj) {
var location, name;
pkgObj = typeof pkgObj === 'string' ? {name: pkgObj} : pkgObj;
name = pkgObj.name;
location = pkgObj.location;
if (location) {
config.paths[name] = pkgObj.location;
}
//Save pointer to main module ID for pkg name.
//Remove leading dot in main, so main paths are normalized,
//and remove any trailing .js, since different package
//envs have different conventions: some use a module name,
//some use a file name.
config.pkgs[name] = pkgObj.name + '/' + (pkgObj.main || 'main')
.replace(currDirRegExp, '')
.replace(jsSuffixRegExp, '');
});
}
//If there are any "waiting to execute" modules in the registry,
//update the maps for them, since their info, like URLs to load,
//may have changed.
eachProp(registry, function (mod, id) {
//If module already has init called, since it is too
//late to modify them, and ignore unnormalized ones
//since they are transient.
if (!mod.inited && !mod.map.unnormalized) {
mod.map = makeModuleMap(id, null, true);
}
});
//If a deps array or a config callback is specified, then call
//require with those args. This is useful when require is defined as a
//config object before require.js is loaded.
if (cfg.deps || cfg.callback) {
context.require(cfg.deps || [], cfg.callback);
}
},
makeShimExports: function (value) {
function fn() {
var ret;
if (value.init) {
ret = value.init.apply(global, arguments);
}
return ret || (value.exports && getGlobal(value.exports));
}
return fn;
},
makeRequire: function (relMap, options) {
options = options || {};
function localRequire(deps, callback, errback) {
var id, map, requireMod;
if (options.enableBuildCallback && callback && isFunction(callback)) {
callback.__requireJsBuild = true;
}
if (typeof deps === 'string') {
if (isFunction(callback)) {
//Invalid call
return onError(makeError('requireargs', 'Invalid require call'), errback);
}
//If require|exports|module are requested, get the
//value for them from the special handlers. Caveat:
//this only works while module is being defined.
if (relMap && hasProp(handlers, deps)) {
return handlers[deps](registry[relMap.id]);
}
//Synchronous access to one module. If require.get is
//available (as in the Node adapter), prefer that.
if (req.get) {
return req.get(context, deps, relMap, localRequire);
}
//Normalize module name, if it contains . or ..
map = makeModuleMap(deps, relMap, false, true);
id = map.id;
if (!hasProp(defined, id)) {
return onError(makeError('notloaded', 'Module name "' +
id +
'" has not been loaded yet for context: ' +
contextName +
(relMap ? '' : '. Use require([])')));
}
return defined[id];
}
//Grab defines waiting in the global queue.
intakeDefines();
//Mark all the dependencies as needing to be loaded.
context.nextTick(function () {
//Some defines could have been added since the
//require call, collect them.
intakeDefines();
requireMod = getModule(makeModuleMap(null, relMap));
//Store if map config should be applied to this require
//call for dependencies.
requireMod.skipMap = options.skipMap;
requireMod.init(deps, callback, errback, {
enabled: true
});
checkLoaded();
});
return localRequire;
}
mixin(localRequire, {
isBrowser: isBrowser,
/**
* Converts a module name + .extension into an URL path.
* *Requires* the use of a module name. It does not support using
* plain URLs like nameToUrl.
*/
toUrl: function (moduleNamePlusExt) {
var ext,
index = moduleNamePlusExt.lastIndexOf('.'),
segment = moduleNamePlusExt.split('/')[0],
isRelative = segment === '.' || segment === '..';
//Have a file extension alias, and it is not the
//dots from a relative path.
if (index !== -1 && (!isRelative || index > 1)) {
ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
moduleNamePlusExt = moduleNamePlusExt.substring(0, index);
}
return context.nameToUrl(normalize(moduleNamePlusExt,
relMap && relMap.id, true), ext, true);
},
defined: function (id) {
return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
},
specified: function (id) {
id = makeModuleMap(id, relMap, false, true).id;
return hasProp(defined, id) || hasProp(registry, id);
}
});
//Only allow undef on top level require calls
if (!relMap) {
localRequire.undef = function (id) {
//Bind any waiting define() calls to this context,
//fix for #408
takeGlobalQueue();
var map = makeModuleMap(id, relMap, true),
mod = getOwn(registry, id);
mod.undefed = true;
removeScript(id);
delete defined[id];
delete urlFetched[map.url];
delete undefEvents[id];
//Clean queued defines too. Go backwards
//in array so that the splices do not
//mess up the iteration.
eachReverse(defQueue, function(args, i) {
if (args[0] === id) {
defQueue.splice(i, 1);
}
});
delete context.defQueueMap[id];
if (mod) {
//Hold on to listeners in case the
//module will be attempted to be reloaded
//using a different config.
if (mod.events.defined) {
undefEvents[id] = mod.events;
}
cleanRegistry(id);
}
};
}
return localRequire;
},
/**
* Called to enable a module if it is still in the registry
* awaiting enablement. A second arg, parent, the parent module,
* is passed in for context, when this method is overridden by
* the optimizer. Not shown here to keep code compact.
*/
enable: function (depMap) {
var mod = getOwn(registry, depMap.id);
if (mod) {
getModule(depMap).enable();
}
},
/**
* Internal method used by environment adapters to complete a load event.
* A load event could be a script load or just a load pass from a synchronous
* load call.
* @param {String} moduleName the name of the module to potentially complete.
*/
completeLoad: function (moduleName) {
var found, args, mod,
shim = getOwn(config.shim, moduleName) || {},
shExports = shim.exports;
takeGlobalQueue();
while (defQueue.length) {
args = defQueue.shift();
if (args[0] === null) {
args[0] = moduleName;
//If already found an anonymous module and bound it
//to this name, then this is some other anon module
//waiting for its completeLoad to fire.
if (found) {
break;
}
found = true;
} else if (args[0] === moduleName) {
//Found matching define call for this script!
found = true;
}
callGetModule(args);
}
context.defQueueMap = {};
//Do this after the cycle of callGetModule in case the result
//of those calls/init calls changes the registry.
mod = getOwn(registry, moduleName);
if (!found && !hasProp(defined, moduleName) && mod && !mod.inited) {
if (config.enforceDefine && (!shExports || !getGlobal(shExports))) {
if (hasPathFallback(moduleName)) {
return;
} else {
return onError(makeError('nodefine',
'No define call for ' + moduleName,
null,
[moduleName]));
}
} else {
//A script that does not call define(), so just simulate
//the call for it.
callGetModule([moduleName, (shim.deps || []), shim.exportsFn]);
}
}
checkLoaded();
},
/**
* Converts a module name to a file path. Supports cases where
* moduleName may actually be just an URL.
* Note that it **does not** call normalize on the moduleName,
* it is assumed to have already been normalized. This is an
* internal API, not a public one. Use toUrl for the public API.
*/
nameToUrl: function (moduleName, ext, skipExt) {
var paths, syms, i, parentModule, url,
parentPath, bundleId,
pkgMain = getOwn(config.pkgs, moduleName);
if (pkgMain) {
moduleName = pkgMain;
}
bundleId = getOwn(bundlesMap, moduleName);
if (bundleId) {
return context.nameToUrl(bundleId, ext, skipExt);
}
//If a colon is in the URL, it indicates a protocol is used and it is just
//an URL to a file, or if it starts with a slash, contains a query arg (i.e. ?)
//or ends with .js, then assume the user meant to use an url and not a module id.
//The slash is important for protocol-less URLs as well as full paths.
if (req.jsExtRegExp.test(moduleName)) {
//Just a plain path, not module name lookup, so just return it.
//Add extension if it is included. This is a bit wonky, only non-.js things pass
//an extension, this method probably needs to be reworked.
url = moduleName + (ext || '');
} else {
//A module that needs to be converted to a path.
paths = config.paths;
syms = moduleName.split('/');
//For each module name segment, see if there is a path
//registered for it. Start with most specific name
//and work up from it.
for (i = syms.length; i > 0; i -= 1) {
parentModule = syms.slice(0, i).join('/');
parentPath = getOwn(paths, parentModule);
if (parentPath) {
//If an array, it means there are a few choices,
//Choose the one that is desired
if (isArray(parentPath)) {
parentPath = parentPath[0];
}
syms.splice(0, i, parentPath);
break;
}
}
//Join the path parts together, then figure out if baseUrl is needed.
url = syms.join('/');
url += (ext || (/^data\:|^blob\:|\?/.test(url) || skipExt ? '' : '.js'));
url = (url.charAt(0) === '/' || url.match(/^[\w\+\.\-]+:/) ? '' : config.baseUrl) + url;
}
return config.urlArgs && !/^blob\:/.test(url) ?
url + config.urlArgs(moduleName, url) : url;
},
//Delegates to req.load. Broken out as a separate function to
//allow overriding in the optimizer.
load: function (id, url) {
req.load(context, id, url);
},
/**
* Executes a module callback function. Broken out as a separate function
* solely to allow the build system to sequence the files in the built
* layer in the right sequence.
*
* @private
*/
execCb: function (name, callback, args, exports) {
return callback.apply(exports, args);
},
/**
* callback for script loads, used to check status of loading.
*
* @param {Event} evt the event from the browser for the script
* that was loaded.
*/
onScriptLoad: function (evt) {
//Using currentTarget instead of target for Firefox 2.0's sake. Not
//all old browsers will be supported, but this one was easy enough
//to support and still makes sense.
if (evt.type === 'load' ||
(readyRegExp.test((evt.currentTarget || evt.srcElement).readyState))) {
//Reset interactive script so a script node is not held onto for
//to long.
interactiveScript = null;
//Pull out the name of the module and the context.
var data = getScriptData(evt);
context.completeLoad(data.id);
}
},
/**
* Callback for script errors.
*/
onScriptError: function (evt) {
var data = getScriptData(evt);
if (!hasPathFallback(data.id)) {
var parents = [];
eachProp(registry, function(value, key) {
if (key.indexOf('_@r') !== 0) {
each(value.depMaps, function(depMap) {
if (depMap.id === data.id) {
parents.push(key);
return true;
}
});
}
});
return onError(makeError('scripterror', 'Script error for "' + data.id +
(parents.length ?
'", needed by: ' + parents.join(', ') :
'"'), evt, [data.id]));
}
}
};
//得到一个闭包环境
context.require = context.makeRequire(); //跳到num ===4
//return context;
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
//--------------------------进入makeRequire------------------------
//第一次
//params [relMap , options] num == 4
var relMap = undefined,
options = {};
//声明localRequire函数
var localRequire= function(deps, callback, errback){};
//给localRequire加属性
var fn1={
isBrowser: isBrowser,
/**
* Converts a module name + .extension into an URL path.
* *Requires* the use of a module name. It does not support using
* plain URLs like nameToUrl.
*/
toUrl: function (moduleNamePlusExt) {
var ext,
index = moduleNamePlusExt.lastIndexOf('.'),
segment = moduleNamePlusExt.split('/')[0],
isRelative = segment === '.' || segment === '..';
//Have a file extension alias, and it is not the
//dots from a relative path.
if (index !== -1 && (!isRelative || index > 1)) {
ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
moduleNamePlusExt = moduleNamePlusExt.substring(0, index);
}
return context.nameToUrl(normalize(moduleNamePlusExt,
relMap && relMap.id, true), ext, true);
},
defined: function (id) {
return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
},
specified: function (id) {
id = makeModuleMap(id, relMap, false, true).id;
return hasProp(defined, id) || hasProp(registry, id);
}
};
//---------------------- 判断 if (!relMap)----------------------
//加属性
var fn2 = undef = function(id){};
//返回return localRequire;
//总结一下 就是返回一个函数，给他加了一些属性；
/*---------------------------------------end-------------------------------*/
/*
*
* */
/*---------------------------------------start-------------------------------*/
// num == 5
intakeDefines() // 调到num == 6
/*
* while (defQueue.length) {}遍历 defQueue；
*
*
*
* */
callGetModule(args); //args [id,deps,callb] 跳到num = 7
context.defQueueMap = {};
context.nextTick(function () {
//Some defines could have been added since the
//require call, collect them.
intakeDefines();
requireMod = getModule(makeModuleMap(null, relMap));
//Store if map config should be applied to this require
//call for dependencies.
requireMod.skipMap = options.skipMap;
requireMod.init(deps, callback, errback, {
enabled: true
});
checkLoaded();
}); //跳转到 12
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
/* function takeGlobalQueue() num == 6
* */
//把globalDefQueue 里面通过define(id,desp,callback) 都放到 特定context 下的 defQueue
//并且最后清空 globalDefQueue = [];
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
// function callGetModule(args) num == 7
//将 defined里没有的 id进行构建模块
if (!hasProp(defined, args[0])) {
getModule(makeModuleMap(args[0], null, true)).init(args[1], args[2]);
}
makeModuleMap(args[0], null, true) //跳转到 num== 8
getModule(makeModuleMap(args[0], null, true)) //跳转到 num == 9
getModule(makeModuleMap(args[0], null, true)).init(args[1], args[2]);//跳转到 num == 11
//生成的Module 里面的map属性 就是 makeModuleMap返回的对象。
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
//function makeModuleMap(name, parentModuleMap, isNormalized, applyMap) //num == 8
//返回obj
var obj = {
prefix: prefix,
name: normalizedName,
parentMap: parentModuleMap,
unnormalized: !!suffix,
url: url,
originalName: originalName,
isDefine: isDefine,
id: (prefix ?
prefix + '!' + normalizedName :
normalizedName) + suffix
};
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//function getModule(depMap) num == 9
var id = depMap.id,
mod = getOwn(registry, id);
if (!mod) {
mod = registry[id] = new context.Module(depMap);
}
new context.Module(depMap); //跳转到10
//return mod;
/*----------------------------------------end-------------------------*/
/*
*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//num ===10
Module = function (map) {
this.events = getOwn(undefEvents, map.id) || {};
this.map = map;
this.shim = getOwn(config.shim, map.id);
this.depExports = [];
this.depMaps = [];
this.depMatched = [];
this.pluginMaps = {};
this.depCount = 0;
/* this.exports this.factory
this.depMaps = [],
this.enabled, this.fetched
*/
};
Module.prototype = {
init: function (depMaps, factory, errback, options) {
options = options || {};
//Do not do more inits if already done. Can happen if there
//are multiple define calls for the same module. That is not
//a normal, common case, but it is also not unexpected.
if (this.inited) {
return;
}
this.factory = factory;
if (errback) {
//Register for errors on this module.
this.on('error', errback);
} else if (this.events.error) {
//If no errback already, but there are error listeners
//on this module, set up an errback to pass to the deps.
errback = bind(this, function (err) {
this.emit('error', err);
});
}
//Do a copy of the dependency array, so that
//source inputs are not modified. For example
//"shim" deps are passed in here directly, and
//doing a direct modification of the depMaps array
//would affect that config.
this.depMaps = depMaps && depMaps.slice(0);
this.errback = errback;
//Indicate this module has be initialized
this.inited = true;
this.ignore = options.ignore;
//Could have option to init this module in enabled mode,
//or could have been previously marked as enabled. However,
//the dependencies are not known until init is called. So
//if enabled previously, now trigger dependencies as enabled.
if (options.enabled || this.enabled) {
//Enable this module and dependencies.
//Will call this.check()
this.enable();
} else {
this.check();
}
},
defineDep: function (i, depExports) {
//Because of cycles, defined callback for a given
//export can be called more than once.
if (!this.depMatched[i]) {
this.depMatched[i] = true;
this.depCount -= 1;
this.depExports[i] = depExports;
}
},
fetch: function () {
if (this.fetched) {
return;
}
this.fetched = true;
context.startTime = (new Date()).getTime();
var map = this.map;
//If the manager is for a plugin managed resource,
//ask the plugin to load it now.
if (this.shim) {
context.makeRequire(this.map, {
enableBuildCallback: true
})(this.shim.deps || [], bind(this, function () {
return map.prefix ? this.callPlugin() : this.load();
}));
} else {
//Regular dependency.
return map.prefix ? this.callPlugin() : this.load();
}
},
load: function () {
var url = this.map.url;
//Regular dependency.
if (!urlFetched[url]) {
urlFetched[url] = true;
context.load(this.map.id, url);
}
},
/**
* Checks if the module is ready to define itself, and if so,
* define it.
*/
check: function () {
if (!this.enabled || this.enabling) {
return;
}
var err, cjsModule,
id = this.map.id,
depExports = this.depExports,
exports = this.exports,
factory = this.factory;
if (!this.inited) {
// Only fetch if not already in the defQueue.
if (!hasProp(context.defQueueMap, id)) {
this.fetch();
}
} else if (this.error) {
this.emit('error', this.error);
} else if (!this.defining) {
//The factory could trigger another require call
//that would result in checking this module to
//define itself again. If already in the process
//of doing that, skip this work.
this.defining = true;
if (this.depCount < 1 && !this.defined) {
if (isFunction(factory)) {
//If there is an error listener, favor passing
//to that instead of throwing an error. However,
//only do it for define()'d modules. require
//errbacks should not be called for failures in
//their callbacks (#699). However if a global
//onError is set, use that.
if ((this.events.error && this.map.isDefine) ||
req.onError !== defaultOnError) {
try {
exports = context.execCb(id, factory, depExports, exports);
} catch (e) {
err = e;
}
} else {
exports = context.execCb(id, factory, depExports, exports);
}
// Favor return value over exports. If node/cjs in play,
// then will not have a return value anyway. Favor
// module.exports assignment over exports object.
if (this.map.isDefine && exports === undefined) {
cjsModule = this.module;
if (cjsModule) {
exports = cjsModule.exports;
} else if (this.usingExports) {
//exports already set the defined value.
exports = this.exports;
}
}
if (err) {
err.requireMap = this.map;
err.requireModules = this.map.isDefine ? [this.map.id] : null;
err.requireType = this.map.isDefine ? 'define' : 'require';
return onError((this.error = err));
}
} else {
//Just a literal value
exports = factory;
}
this.exports = exports;
if (this.map.isDefine && !this.ignore) {
defined[id] = exports;
if (req.onResourceLoad) {
var resLoadMaps = [];
each(this.depMaps, function (depMap) {
resLoadMaps.push(depMap.normalizedMap || depMap);
});
req.onResourceLoad(context, this.map, resLoadMaps);
}
}
//Clean up
cleanRegistry(id);
this.defined = true;
}
//Finished the define stage. Allow calling check again
//to allow define notifications below in the case of a
//cycle.
this.defining = false;
if (this.defined && !this.defineEmitted) {
this.defineEmitted = true;
this.emit('defined', this.exports);
this.defineEmitComplete = true;
}
}
},
callPlugin: function () {
var map = this.map,
id = map.id,
//Map already normalized the prefix.
pluginMap = makeModuleMap(map.prefix);
//Mark this as a dependency for this plugin, so it
//can be traced for cycles.
this.depMaps.push(pluginMap);
on(pluginMap, 'defined', bind(this, function (plugin) {
var load, normalizedMap, normalizedMod,
bundleId = getOwn(bundlesMap, this.map.id),
name = this.map.name,
parentName = this.map.parentMap ? this.map.parentMap.name : null,
localRequire = context.makeRequire(map.parentMap, {
enableBuildCallback: true
});
//If current map is not normalized, wait for that
//normalized name to load instead of continuing.
if (this.map.unnormalized) {
//Normalize the ID if the plugin allows it.
if (plugin.normalize) {
name = plugin.normalize(name, function (name) {
return normalize(name, parentName, true);
}) || '';
}
//prefix and name should already be normalized, no need
//for applying map config again either.
normalizedMap = makeModuleMap(map.prefix + '!' + name,
this.map.parentMap);
on(normalizedMap,
'defined', bind(this, function (value) {
this.map.normalizedMap = normalizedMap;
this.init([], function () { return value; }, null, {
enabled: true,
ignore: true
});
}));
normalizedMod = getOwn(registry, normalizedMap.id);
if (normalizedMod) {
//Mark this as a dependency for this plugin, so it
//can be traced for cycles.
this.depMaps.push(normalizedMap);
if (this.events.error) {
normalizedMod.on('error', bind(this, function (err) {
this.emit('error', err);
}));
}
normalizedMod.enable();
}
return;
}
//If a paths config, then just load that file instead to
//resolve the plugin, as it is built into that paths layer.
if (bundleId) {
this.map.url = context.nameToUrl(bundleId);
this.load();
return;
}
load = bind(this, function (value) {
this.init([], function () { return value; }, null, {
enabled: true
});
});
load.error = bind(this, function (err) {
this.inited = true;
this.error = err;
err.requireModules = [id];
//Remove temp unnormalized modules for this module,
//since they will never be resolved otherwise now.
eachProp(registry, function (mod) {
if (mod.map.id.indexOf(id + '_unnormalized') === 0) {
cleanRegistry(mod.map.id);
}
});
onError(err);
});
//Allow plugins to load other code without having to know the
//context or how to 'complete' the load.
load.fromText = bind(this, function (text, textAlt) {
/*jslint evil: true */
var moduleName = map.name,
moduleMap = makeModuleMap(moduleName),
hasInteractive = useInteractive;
//As of 2.1.0, support just passing the text, to reinforce
//fromText only being called once per resource. Still
//support old style of passing moduleName but discard
//that moduleName in favor of the internal ref.
if (textAlt) {
text = textAlt;
}
//Turn off interactive script matching for IE for any define
//calls in the text, then turn it back on at the end.
if (hasInteractive) {
useInteractive = false;
}
//Prime the system by creating a module instance for
//it.
getModule(moduleMap);
//Transfer any config to this other module.
if (hasProp(config.config, id)) {
config.config[moduleName] = config.config[id];
}
try {
req.exec(text);
} catch (e) {
return onError(makeError('fromtexteval',
'fromText eval for ' + id +
' failed: ' + e,
e,
[id]));
}
if (hasInteractive) {
useInteractive = true;
}
//Mark this as a dependency for the plugin
//resource
this.depMaps.push(moduleMap);
//Support anonymous modules.
context.completeLoad(moduleName);
//Bind the value of that module to the value for this
//resource ID.
localRequire([moduleName], load);
});
//Use parentName here since the plugin's name is not reliable,
//could be some weird string with no path that actually wants to
//reference the parentName's path.
plugin.load(map.name, localRequire, load, config);
}));
context.enable(pluginMap, this);
this.pluginMaps[pluginMap.id] = pluginMap;
},
enable: function () {
enabledRegistry[this.map.id] = this;
this.enabled = true;
//Set flag mentioning that the module is enabling,
//so that immediate calls to the defined callbacks
//for dependencies do not trigger inadvertent load
//with the depCount still being zero.
this.enabling = true;
//Enable each dependency
each(this.depMaps, bind(this, function (depMap, i) {
var id, mod, handler;
if (typeof depMap === 'string') {
//Dependency needs to be converted to a depMap
//and wired up to this module.
depMap = makeModuleMap(depMap,
(this.map.isDefine ? this.map : this.map.parentMap),
false,
!this.skipMap);
this.depMaps[i] = depMap;
handler = getOwn(handlers, depMap.id);
if (handler) {
this.depExports[i] = handler(this);
return;
}
this.depCount += 1;
on(depMap, 'defined', bind(this, function (depExports) {
if (this.undefed) {
return;
}
this.defineDep(i, depExports);
this.check();
}));
if (this.errback) {
on(depMap, 'error', bind(this, this.errback));
} else if (this.events.error) {
// No direct errback on this module, but something
// else is listening for errors, so be sure to
// propagate the error correctly.
on(depMap, 'error', bind(this, function(err) {
this.emit('error', err);
}));
}
}
id = depMap.id;
mod = registry[id];
//Skip special modules like 'require', 'exports', 'module'
//Also, don't call enable if it is already enabled,
//important in circular dependency cases.
if (!hasProp(handlers, id) && mod && !mod.enabled) {
context.enable(depMap, this);
}
}));
//Enable each plugin that is used in
//a dependency
eachProp(this.pluginMaps, bind(this, function (pluginMap) {
var mod = getOwn(registry, pluginMap.id);
if (mod && !mod.enabled) {
context.enable(pluginMap, this);
}
}));
this.enabling = false;
this.check();
},
on: function (name, cb) {
var cbs = this.events[name];
if (!cbs) {
cbs = this.events[name] = [];
}
cbs.push(cb);
},
emit: function (name, evt) {
each(this.events[name], function (cb) {
cb(evt);
});
if (name === 'error') {
//Now that the error handler was triggered, remove
//the listeners, since this broken Module instance
//can stay around for a while in the registry.
delete this.events[name];
}
}
};
/*-----------------------------------------end--------------------------------*/
/*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//num = 11
//init: function (depMaps, factory, errback, options) {}
this.factory = factory;
this.depMaps = depMaps && depMaps.slice(0);
this.errback = errback;
//Indicate this module has be initialized
this.inited = true;
this.ignore = options.ignore;
//总结一句话 就是给module.绑定数据。
/*----------------------------------------end-------------------------*/
/*
*
* */
/*----------------------------------------start-------------------------*/
num == 12
/*----------------------------------------end-------------------------*/
/*
*
* */
/*---------------------------------------start-------------------------------*/
req({}); // num == 1 跳到 num == 2
//Exports some context-sensitive methods on global require.
each([
'toUrl',
'undef',
'defined',
'specified'
], function (prop) {
//Reference from contexts instead of early binding to default context,
//so that during builds, the latest instance of the default context
//with its config gets used.
req[prop] = function () {
var ctx = contexts[defContextName];
return ctx.require[prop].apply(ctx, arguments);
};
});
if (isBrowser && !cfg.skipDataMain) {} //req.deps[mainscript]
//Set up with config info.
req(cfg); //最后启动。 按照之前写的num 一步一步的去加载。
/*----------------------------------------start---------------------------------*/
//第一次 num == 2
//params
var deps = {},
callback = undefined,
errback = undefined,
optional = undefined;
//--------------声明------------------
var context = undefined,
config = undefined,
contextName = defContextName;
//-------------判断---------------
config = {};
deps = [];
//------------判断--------------
context = contexts[contextName] = req.s.newContext(contextName); //跳到num ==3
//时间上就是执行 localRequire(deps, callback, errback);
context.require(deps, callback, errback); //跳到 num ==5
/*---------------------------------------end-------------------------------*/
/*
*
*
* */
/*---------------------------------------start-------------------------------*/
//-----------------------进入核心函数--------------------------
//第一次
//function newContext(contextName) num == 3
context = {
config: config,
contextName: contextName,
registry: registry,
defined: defined,
urlFetched: urlFetched,
defQueue: defQueue,
defQueueMap: {},
Module: Module,
makeModuleMap: makeModuleMap,
nextTick: req.nextTick,
onError: onError,
/**
* Set a configuration for the context.
* @param {Object} cfg config object to integrate.
*/
configure: function (cfg) {
//Make sure the baseUrl ends in a slash.
if (cfg.baseUrl) {
if (cfg.baseUrl.charAt(cfg.baseUrl.length - ) !== '/') {
cfg.baseUrl += '/';
}
}
// Convert old style urlArgs string to a function.
if (typeof cfg.urlArgs === 'string') {
var urlArgs = cfg.urlArgs;
cfg.urlArgs = function(id, url) {
return (url.indexOf('?') === -1 ? '?' : '&') + urlArgs;
};
}
//Save off the paths since they require special processing,
//they are additive.
var shim = config.shim,
objs = {
paths: true,
bundles: true,
config: true,
map: true
};
eachProp(cfg, function (value, prop) {
if (objs[prop]) {
if (!config[prop]) {
config[prop] = {};
}
mixin(config[prop], value, true, true);
} else {
config[prop] = value;
}
});
//Reverse map the bundles
if (cfg.bundles) {
eachProp(cfg.bundles, function (value, prop) {
each(value, function (v) {
if (v !== prop) {
bundlesMap[v] = prop;
}
});
});
}
//Merge shim
if (cfg.shim) {
eachProp(cfg.shim, function (value, id) {
//Normalize the structure
if (isArray(value)) {
value = {
deps: value
};
}
if ((value.exports || value.init) && !value.exportsFn) {
value.exportsFn = context.makeShimExports(value);
}
shim[id] = value;
});
config.shim = shim;
}
//Adjust packages if necessary.
if (cfg.packages) {
each(cfg.packages, function (pkgObj) {
var location, name;
pkgObj = typeof pkgObj === 'string' ? {name: pkgObj} : pkgObj;
name = pkgObj.name;
location = pkgObj.location;
if (location) {
config.paths[name] = pkgObj.location;
}
//Save pointer to main module ID for pkg name.
//Remove leading dot in main, so main paths are normalized,
//and remove any trailing .js, since different package
//envs have different conventions: some use a module name,
//some use a file name.
config.pkgs[name] = pkgObj.name + '/' + (pkgObj.main || 'main')
.replace(currDirRegExp, '')
.replace(jsSuffixRegExp, '');
});
}
//If there are any "waiting to execute" modules in the registry,
//update the maps for them, since their info, like URLs to load,
//may have changed.
eachProp(registry, function (mod, id) {
//If module already has init called, since it is too
//late to modify them, and ignore unnormalized ones
//since they are transient.
if (!mod.inited && !mod.map.unnormalized) {
mod.map = makeModuleMap(id, null, true);
}
});
//If a deps array or a config callback is specified, then call
//require with those args. This is useful when require is defined as a
//config object before require.js is loaded.
if (cfg.deps || cfg.callback) {
context.require(cfg.deps || [], cfg.callback);
}
},
makeShimExports: function (value) {
function fn() {
var ret;
if (value.init) {
ret = value.init.apply(global, arguments);
}
return ret || (value.exports && getGlobal(value.exports));
}
return fn;
},
makeRequire: function (relMap, options) {
options = options || {};
function localRequire(deps, callback, errback) {
var id, map, requireMod;
if (options.enableBuildCallback && callback && isFunction(callback)) {
callback.__requireJsBuild = true;
}
if (typeof deps === 'string') {
if (isFunction(callback)) {
//Invalid call
return onError(makeError('requireargs', 'Invalid require call'), errback);
}
//If require|exports|module are requested, get the
//value for them from the special handlers. Caveat:
//this only works while module is being defined.
if (relMap && hasProp(handlers, deps)) {
return handlers[deps](registry[relMap.id]);
}
//Synchronous access to one module. If require.get is
//available (as in the Node adapter), prefer that.
if (req.get) {
return req.get(context, deps, relMap, localRequire);
}
//Normalize module name, if it contains . or ..
map = makeModuleMap(deps, relMap, false, true);
id = map.id;
if (!hasProp(defined, id)) {
return onError(makeError('notloaded', 'Module name "' +
id +
'" has not been loaded yet for context: ' +
contextName +
(relMap ? '' : '. Use require([])')));
}
return defined[id];
}
//Grab defines waiting in the global queue.
intakeDefines();
//Mark all the dependencies as needing to be loaded.
context.nextTick(function () {
//Some defines could have been added since the
//require call, collect them.
intakeDefines();
requireMod = getModule(makeModuleMap(null, relMap));
//Store if map config should be applied to this require
//call for dependencies.
requireMod.skipMap = options.skipMap;
requireMod.init(deps, callback, errback, {
enabled: true
});
checkLoaded();
});
return localRequire;
}
mixin(localRequire, {
isBrowser: isBrowser,
/**
* Converts a module name + .extension into an URL path.
* *Requires* the use of a module name. It does not support using
* plain URLs like nameToUrl.
*/
toUrl: function (moduleNamePlusExt) {
var ext,
index = moduleNamePlusExt.lastIndexOf('.'),
segment = moduleNamePlusExt.split('/')[],
isRelative = segment === '.' || segment === '..';
//Have a file extension alias, and it is not the
//dots from a relative path.
if (index !== -1 && (!isRelative || index > )) {
ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
moduleNamePlusExt = moduleNamePlusExt.substring(, index);
}
return context.nameToUrl(normalize(moduleNamePlusExt,
relMap && relMap.id, true), ext, true);
},
defined: function (id) {
return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
},
specified: function (id) {
id = makeModuleMap(id, relMap, false, true).id;
return hasProp(defined, id) || hasProp(registry, id);
}
});
//Only allow undef on top level require calls
if (!relMap) {
localRequire.undef = function (id) {
//Bind any waiting define() calls to this context,
//fix for #408
takeGlobalQueue();
var map = makeModuleMap(id, relMap, true),
mod = getOwn(registry, id);
mod.undefed = true;
removeScript(id);
delete defined[id];
delete urlFetched[map.url];
delete undefEvents[id];
//Clean queued defines too. Go backwards
//in array so that the splices do not
//mess up the iteration.
eachReverse(defQueue, function(args, i) {
if (args[] === id) {
defQueue.splice(i, );
}
});
delete context.defQueueMap[id];
if (mod) {
//Hold on to listeners in case the
//module will be attempted to be reloaded
//using a different config.
if (mod.events.defined) {
undefEvents[id] = mod.events;
}
cleanRegistry(id);
}
};
}
return localRequire;
},
/**
* Called to enable a module if it is still in the registry
* awaiting enablement. A second arg, parent, the parent module,
* is passed in for context, when this method is overridden by
* the optimizer. Not shown here to keep code compact.
*/
enable: function (depMap) {
var mod = getOwn(registry, depMap.id);
if (mod) {
getModule(depMap).enable();
}
},
/**
* Internal method used by environment adapters to complete a load event.
* A load event could be a script load or just a load pass from a synchronous
* load call.
* @param {String} moduleName the name of the module to potentially complete.
*/
completeLoad: function (moduleName) {
var found, args, mod,
shim = getOwn(config.shim, moduleName) || {},
shExports = shim.exports;
takeGlobalQueue();
while (defQueue.length) {
args = defQueue.shift();
if (args[] === null) {
args[] = moduleName;
//If already found an anonymous module and bound it
//to this name, then this is some other anon module
//waiting for its completeLoad to fire.
if (found) {
break;
}
found = true;
} else if (args[] === moduleName) {
//Found matching define call for this script!
found = true;
}
callGetModule(args);
}
context.defQueueMap = {};
//Do this after the cycle of callGetModule in case the result
//of those calls/init calls changes the registry.
mod = getOwn(registry, moduleName);
if (!found && !hasProp(defined, moduleName) && mod && !mod.inited) {
if (config.enforceDefine && (!shExports || !getGlobal(shExports))) {
if (hasPathFallback(moduleName)) {
return;
} else {
return onError(makeError('nodefine',
'No define call for ' + moduleName,
null,
[moduleName]));
}
} else {
//A script that does not call define(), so just simulate
//the call for it.
callGetModule([moduleName, (shim.deps || []), shim.exportsFn]);
}
}
checkLoaded();
},
/**
* Converts a module name to a file path. Supports cases where
* moduleName may actually be just an URL.
* Note that it **does not** call normalize on the moduleName,
* it is assumed to have already been normalized. This is an
* internal API, not a public one. Use toUrl for the public API.
*/
nameToUrl: function (moduleName, ext, skipExt) {
var paths, syms, i, parentModule, url,
parentPath, bundleId,
pkgMain = getOwn(config.pkgs, moduleName);
if (pkgMain) {
moduleName = pkgMain;
}
bundleId = getOwn(bundlesMap, moduleName);
if (bundleId) {
return context.nameToUrl(bundleId, ext, skipExt);
}
//If a colon is in the URL, it indicates a protocol is used and it is just
//an URL to a file, or if it starts with a slash, contains a query arg (i.e. ?)
//or ends with .js, then assume the user meant to use an url and not a module id.
//The slash is important for protocol-less URLs as well as full paths.
if (req.jsExtRegExp.test(moduleName)) {
//Just a plain path, not module name lookup, so just return it.
//Add extension if it is included. This is a bit wonky, only non-.js things pass
//an extension, this method probably needs to be reworked.
url = moduleName + (ext || '');
} else {
//A module that needs to be converted to a path.
paths = config.paths;
syms = moduleName.split('/');
//For each module name segment, see if there is a path
//registered for it. Start with most specific name
//and work up from it.
for (i = syms.length; i > ; i -= ) {
parentModule = syms.slice(, i).join('/');
parentPath = getOwn(paths, parentModule);
if (parentPath) {
//If an array, it means there are a few choices,
//Choose the one that is desired
if (isArray(parentPath)) {
parentPath = parentPath[];
}
syms.splice(, i, parentPath);
break;
}
}
//Join the path parts together, then figure out if baseUrl is needed.
url = syms.join('/');
url += (ext || (/^data\:|^blob\:|\?/.test(url) || skipExt ? '' : '.js'));
url = (url.charAt() === '/' || url.match(/^[\w\+\.\-]+:/) ? '' : config.baseUrl) + url;
}
return config.urlArgs && !/^blob\:/.test(url) ?
url + config.urlArgs(moduleName, url) : url;
},
//Delegates to req.load. Broken out as a separate function to
//allow overriding in the optimizer.
load: function (id, url) {
req.load(context, id, url);
},
/**
* Executes a module callback function. Broken out as a separate function
* solely to allow the build system to sequence the files in the built
* layer in the right sequence.
*
* @private
*/
execCb: function (name, callback, args, exports) {
return callback.apply(exports, args);
},
/**
* callback for script loads, used to check status of loading.
*
* @param {Event} evt the event from the browser for the script
* that was loaded.
*/
onScriptLoad: function (evt) {
//Using currentTarget instead of target for Firefox 2.0's sake. Not
//all old browsers will be supported, but this one was easy enough
//to support and still makes sense.
if (evt.type === 'load' ||
(readyRegExp.test((evt.currentTarget || evt.srcElement).readyState))) {
//Reset interactive script so a script node is not held onto for
//to long.
interactiveScript = null;
//Pull out the name of the module and the context.
var data = getScriptData(evt);
context.completeLoad(data.id);
}
},
/**
* Callback for script errors.
*/
onScriptError: function (evt) {
var data = getScriptData(evt);
if (!hasPathFallback(data.id)) {
var parents = [];
eachProp(registry, function(value, key) {
if (key.indexOf('_@r') !== ) {
each(value.depMaps, function(depMap) {
if (depMap.id === data.id) {
parents.push(key);
return true;
}
});
}
});
return onError(makeError('scripterror', 'Script error for "' + data.id +
(parents.length ?
'", needed by: ' + parents.join(', ') :
'"'), evt, [data.id]));
}
}
};
//得到一个闭包环境
context.require = context.makeRequire(); //跳到num ===4
//return context;
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
//--------------------------进入makeRequire------------------------
//第一次
//params [relMap , options] num == 4
var relMap = undefined,
options = {};
//声明localRequire函数
var localRequire= function(deps, callback, errback){};
//给localRequire加属性
var fn1={
isBrowser: isBrowser,
/**
* Converts a module name + .extension into an URL path.
* *Requires* the use of a module name. It does not support using
* plain URLs like nameToUrl.
*/
toUrl: function (moduleNamePlusExt) {
var ext,
index = moduleNamePlusExt.lastIndexOf('.'),
segment = moduleNamePlusExt.split('/')[],
isRelative = segment === '.' || segment === '..';
//Have a file extension alias, and it is not the
//dots from a relative path.
if (index !== -1 && (!isRelative || index > )) {
ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
moduleNamePlusExt = moduleNamePlusExt.substring(, index);
}
return context.nameToUrl(normalize(moduleNamePlusExt,
relMap && relMap.id, true), ext, true);
},
defined: function (id) {
return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
},
specified: function (id) {
id = makeModuleMap(id, relMap, false, true).id;
return hasProp(defined, id) || hasProp(registry, id);
}
};
//---------------------- 判断 if (!relMap)----------------------
//加属性
var fn2 = undef = function(id){};
//返回return localRequire;
//总结一下 就是返回一个函数，给他加了一些属性；
/*---------------------------------------end-------------------------------*/
/*
*
* */
/*---------------------------------------start-------------------------------*/
// num == 5
intakeDefines() // 调到num == 6
/*
* while (defQueue.length) {}遍历 defQueue；
*
*
*
* */
callGetModule(args); //args [id,deps,callb] 跳到num = 7
context.defQueueMap = {};
context.nextTick(function () {
//Some defines could have been added since the
//require call, collect them.
intakeDefines();
requireMod = getModule(makeModuleMap(null, relMap));
//Store if map config should be applied to this require
//call for dependencies.
requireMod.skipMap = options.skipMap;
requireMod.init(deps, callback, errback, {
enabled: true
});
checkLoaded();
}); //跳转到 12
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
/* function takeGlobalQueue() num == 6
* */
//把globalDefQueue 里面通过define(id,desp,callback) 都放到 特定context 下的 defQueue
//并且最后清空 globalDefQueue = [];
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
// function callGetModule(args) num == 7
//将 defined里没有的 id进行构建模块
if (!hasProp(defined, args[])) {
getModule(makeModuleMap(args[], null, true)).init(args[], args[]);
}
makeModuleMap(args[], null, true) //跳转到 num== 8
getModule(makeModuleMap(args[], null, true)) //跳转到 num == 9
getModule(makeModuleMap(args[], null, true)).init(args[], args[]);//跳转到 num == 11
//生成的Module 里面的map属性 就是 makeModuleMap返回的对象。
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*---------------------------------------start-------------------------------*/
//function makeModuleMap(name, parentModuleMap, isNormalized, applyMap) //num == 8
//返回obj
var obj = {
prefix: prefix,
name: normalizedName,
parentMap: parentModuleMap,
unnormalized: !!suffix,
url: url,
originalName: originalName,
isDefine: isDefine,
id: (prefix ?
prefix + '!' + normalizedName :
normalizedName) + suffix
};
/*---------------------------------------end-------------------------------*/
/*
*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//function getModule(depMap) num == 9
var id = depMap.id,
mod = getOwn(registry, id);
if (!mod) {
mod = registry[id] = new context.Module(depMap);
}
new context.Module(depMap); //跳转到10
//return mod;
/*----------------------------------------end-------------------------*/
/*
*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//num ===10
Module = function (map) {
this.events = getOwn(undefEvents, map.id) || {};
this.map = map;
this.shim = getOwn(config.shim, map.id);
this.depExports = [];
this.depMaps = [];
this.depMatched = [];
this.pluginMaps = {};
this.depCount = ;
/* this.exports this.factory
this.depMaps = [],
this.enabled, this.fetched
*/
};
Module.prototype = {
init: function (depMaps, factory, errback, options) {
options = options || {};
//Do not do more inits if already done. Can happen if there
//are multiple define calls for the same module. That is not
//a normal, common case, but it is also not unexpected.
if (this.inited) {
return;
}
this.factory = factory;
if (errback) {
//Register for errors on this module.
this.on('error', errback);
} else if (this.events.error) {
//If no errback already, but there are error listeners
//on this module, set up an errback to pass to the deps.
errback = bind(this, function (err) {
this.emit('error', err);
});
}
//Do a copy of the dependency array, so that
//source inputs are not modified. For example
//"shim" deps are passed in here directly, and
//doing a direct modification of the depMaps array
//would affect that config.
this.depMaps = depMaps && depMaps.slice();
this.errback = errback;
//Indicate this module has be initialized
this.inited = true;
this.ignore = options.ignore;
//Could have option to init this module in enabled mode,
//or could have been previously marked as enabled. However,
//the dependencies are not known until init is called. So
//if enabled previously, now trigger dependencies as enabled.
if (options.enabled || this.enabled) {
//Enable this module and dependencies.
//Will call this.check()
this.enable();
} else {
this.check();
}
},
defineDep: function (i, depExports) {
//Because of cycles, defined callback for a given
//export can be called more than once.
if (!this.depMatched[i]) {
this.depMatched[i] = true;
this.depCount -= ;
this.depExports[i] = depExports;
}
},
fetch: function () {
if (this.fetched) {
return;
}
this.fetched = true;
context.startTime = (new Date()).getTime();
var map = this.map;
//If the manager is for a plugin managed resource,
//ask the plugin to load it now.
if (this.shim) {
context.makeRequire(this.map, {
enableBuildCallback: true
})(this.shim.deps || [], bind(this, function () {
return map.prefix ? this.callPlugin() : this.load();
}));
} else {
//Regular dependency.
return map.prefix ? this.callPlugin() : this.load();
}
},
load: function () {
var url = this.map.url;
//Regular dependency.
if (!urlFetched[url]) {
urlFetched[url] = true;
context.load(this.map.id, url);
}
},
/**
* Checks if the module is ready to define itself, and if so,
* define it.
*/
check: function () {
if (!this.enabled || this.enabling) {
return;
}
var err, cjsModule,
id = this.map.id,
depExports = this.depExports,
exports = this.exports,
factory = this.factory;
if (!this.inited) {
// Only fetch if not already in the defQueue.
if (!hasProp(context.defQueueMap, id)) {
this.fetch();
}
} else if (this.error) {
this.emit('error', this.error);
} else if (!this.defining) {
//The factory could trigger another require call
//that would result in checking this module to
//define itself again. If already in the process
//of doing that, skip this work.
this.defining = true;
if (this.depCount < 1 && !this.defined) {
if (isFunction(factory)) {
//If there is an error listener, favor passing
//to that instead of throwing an error. However,
//only do it for define()'d modules. require
//errbacks should not be called for failures in
//their callbacks (#699). However if a global
//onError is set, use that.
if ((this.events.error && this.map.isDefine) ||
req.onError !== defaultOnError) {
try {
exports = context.execCb(id, factory, depExports, exports);
} catch (e) {
err = e;
}
} else {
exports = context.execCb(id, factory, depExports, exports);
}
// Favor return value over exports. If node/cjs in play,
// then will not have a return value anyway. Favor
// module.exports assignment over exports object.
if (this.map.isDefine && exports === undefined) {
cjsModule = this.module;
if (cjsModule) {
exports = cjsModule.exports;
} else if (this.usingExports) {
//exports already set the defined value.
exports = this.exports;
}
}
if (err) {
err.requireMap = this.map;
err.requireModules = this.map.isDefine ? [this.map.id] : null;
err.requireType = this.map.isDefine ? 'define' : 'require';
return onError((this.error = err));
}
} else {
//Just a literal value
exports = factory;
}
this.exports = exports;
if (this.map.isDefine && !this.ignore) {
defined[id] = exports;
if (req.onResourceLoad) {
var resLoadMaps = [];
each(this.depMaps, function (depMap) {
resLoadMaps.push(depMap.normalizedMap || depMap);
});
req.onResourceLoad(context, this.map, resLoadMaps);
}
}
//Clean up
cleanRegistry(id);
this.defined = true;
}
//Finished the define stage. Allow calling check again
//to allow define notifications below in the case of a
//cycle.
this.defining = false;
if (this.defined && !this.defineEmitted) {
this.defineEmitted = true;
this.emit('defined', this.exports);
this.defineEmitComplete = true;
}
}
},
callPlugin: function () {
var map = this.map,
id = map.id,
//Map already normalized the prefix.
pluginMap = makeModuleMap(map.prefix);
//Mark this as a dependency for this plugin, so it
//can be traced for cycles.
this.depMaps.push(pluginMap);
on(pluginMap, 'defined', bind(this, function (plugin) {
var load, normalizedMap, normalizedMod,
bundleId = getOwn(bundlesMap, this.map.id),
name = this.map.name,
parentName = this.map.parentMap ? this.map.parentMap.name : null,
localRequire = context.makeRequire(map.parentMap, {
enableBuildCallback: true
});
//If current map is not normalized, wait for that
//normalized name to load instead of continuing.
if (this.map.unnormalized) {
//Normalize the ID if the plugin allows it.
if (plugin.normalize) {
name = plugin.normalize(name, function (name) {
return normalize(name, parentName, true);
}) || '';
}
//prefix and name should already be normalized, no need
//for applying map config again either.
normalizedMap = makeModuleMap(map.prefix + '!' + name,
this.map.parentMap);
on(normalizedMap,
'defined', bind(this, function (value) {
this.map.normalizedMap = normalizedMap;
this.init([], function () { return value; }, null, {
enabled: true,
ignore: true
});
}));
normalizedMod = getOwn(registry, normalizedMap.id);
if (normalizedMod) {
//Mark this as a dependency for this plugin, so it
//can be traced for cycles.
this.depMaps.push(normalizedMap);
if (this.events.error) {
normalizedMod.on('error', bind(this, function (err) {
this.emit('error', err);
}));
}
normalizedMod.enable();
}
return;
}
//If a paths config, then just load that file instead to
//resolve the plugin, as it is built into that paths layer.
if (bundleId) {
this.map.url = context.nameToUrl(bundleId);
this.load();
return;
}
load = bind(this, function (value) {
this.init([], function () { return value; }, null, {
enabled: true
});
});
load.error = bind(this, function (err) {
this.inited = true;
this.error = err;
err.requireModules = [id];
//Remove temp unnormalized modules for this module,
//since they will never be resolved otherwise now.
eachProp(registry, function (mod) {
if (mod.map.id.indexOf(id + '_unnormalized') === ) {
cleanRegistry(mod.map.id);
}
});
onError(err);
});
//Allow plugins to load other code without having to know the
//context or how to 'complete' the load.
load.fromText = bind(this, function (text, textAlt) {
/*jslint evil: true */
var moduleName = map.name,
moduleMap = makeModuleMap(moduleName),
hasInteractive = useInteractive;
//As of 2.1.0, support just passing the text, to reinforce
//fromText only being called once per resource. Still
//support old style of passing moduleName but discard
//that moduleName in favor of the internal ref.
if (textAlt) {
text = textAlt;
}
//Turn off interactive script matching for IE for any define
//calls in the text, then turn it back on at the end.
if (hasInteractive) {
useInteractive = false;
}
//Prime the system by creating a module instance for
//it.
getModule(moduleMap);
//Transfer any config to this other module.
if (hasProp(config.config, id)) {
config.config[moduleName] = config.config[id];
}
try {
req.exec(text);
} catch (e) {
return onError(makeError('fromtexteval',
'fromText eval for ' + id +
' failed: ' + e,
e,
[id]));
}
if (hasInteractive) {
useInteractive = true;
}
//Mark this as a dependency for the plugin
//resource
this.depMaps.push(moduleMap);
//Support anonymous modules.
context.completeLoad(moduleName);
//Bind the value of that module to the value for this
//resource ID.
localRequire([moduleName], load);
});
//Use parentName here since the plugin's name is not reliable,
//could be some weird string with no path that actually wants to
//reference the parentName's path.
plugin.load(map.name, localRequire, load, config);
}));
context.enable(pluginMap, this);
this.pluginMaps[pluginMap.id] = pluginMap;
},
enable: function () {
enabledRegistry[this.map.id] = this;
this.enabled = true;
//Set flag mentioning that the module is enabling,
//so that immediate calls to the defined callbacks
//for dependencies do not trigger inadvertent load
//with the depCount still being zero.
this.enabling = true;
//Enable each dependency
each(this.depMaps, bind(this, function (depMap, i) {
var id, mod, handler;
if (typeof depMap === 'string') {
//Dependency needs to be converted to a depMap
//and wired up to this module.
depMap = makeModuleMap(depMap,
(this.map.isDefine ? this.map : this.map.parentMap),
false,
!this.skipMap);
this.depMaps[i] = depMap;
handler = getOwn(handlers, depMap.id);
if (handler) {
this.depExports[i] = handler(this);
return;
}
this.depCount += ;
on(depMap, 'defined', bind(this, function (depExports) {
if (this.undefed) {
return;
}
this.defineDep(i, depExports);
this.check();
}));
if (this.errback) {
on(depMap, 'error', bind(this, this.errback));
} else if (this.events.error) {
// No direct errback on this module, but something
// else is listening for errors, so be sure to
// propagate the error correctly.
on(depMap, 'error', bind(this, function(err) {
this.emit('error', err);
}));
}
}
id = depMap.id;
mod = registry[id];
//Skip special modules like 'require', 'exports', 'module'
//Also, don't call enable if it is already enabled,
//important in circular dependency cases.
if (!hasProp(handlers, id) && mod && !mod.enabled) {
context.enable(depMap, this);
}
}));
//Enable each plugin that is used in
//a dependency
eachProp(this.pluginMaps, bind(this, function (pluginMap) {
var mod = getOwn(registry, pluginMap.id);
if (mod && !mod.enabled) {
context.enable(pluginMap, this);
}
}));
this.enabling = false;
this.check();
},
on: function (name, cb) {
var cbs = this.events[name];
if (!cbs) {
cbs = this.events[name] = [];
}
cbs.push(cb);
},
emit: function (name, evt) {
each(this.events[name], function (cb) {
cb(evt);
});
if (name === 'error') {
//Now that the error handler was triggered, remove
//the listeners, since this broken Module instance
//can stay around for a while in the registry.
delete this.events[name];
}
}
};
/*-----------------------------------------end--------------------------------*/
/*
*
*
*
* */
/*-----------------------------------------start--------------------------------*/
//num = 11
//init: function (depMaps, factory, errback, options) {}
this.factory = factory;
this.depMaps = depMaps && depMaps.slice();
this.errback = errback;
//Indicate this module has be initialized
this.inited = true;
this.ignore = options.ignore;
//总结一句话 就是给module.绑定数据。
/*----------------------------------------end-------------------------*/
/*
*
* */
/*----------------------------------------start-------------------------*/
num == 12
/*----------------------------------------end-------------------------*/
/*
*
* */
