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1.angular 初始化流程
function(window, document, undefined) {
//定位到4939行，这里是angularjs开始执行初始化的地方,见代码
styleDirective = valueFn({
restrict: "E",
terminal: !0
});
bindJQuery(), publishExternalAPI(angular), jqLite(document).ready(function() {
angularInit(document, bootstrap)
})
//bindJQuery方法是检查是否引用jquery，没有的话jqlite就用本身自带的，否则切换到jquery中去.这个好理解
publishExternalAPI这个方法是绑定一些公共的方法到angular下面,这些是可以在网站中访问到的,像forEach,copy等公共方法，还有一个重要的任务就是初始化angular核心的模块,publishExternalAPI在465行，现在我们来分析里面的一些重要的代码
}(window, document),
!angular.$$csp() && //个人理解为此处angular的标志变量未定义
//下面就是为将angular找到head 对一些指令追加css样式
angular.element(document).find("head").prepend(‘<style type="text/css">@charset "UTF-8";
[ng\\:cloak],[ng-cloak],[data-ng-cloak],[x-ng-cloak],.ng-cloak,.x-ng-cloak,.ng-hide{display:none !important;}ng\\:form{display:block;}.
ng-animate-start{clip:rect(0,auto,auto,0);-ms-zoom:1.0001;}.
ng-animate-active{clip:rect(-1px,auto,auto,0);-ms-zoom:1;}</style>‘);
/“”“”“”“”“”“”“”“”“”完成jquery绑定“”“”“”“”“”“”“”“”“”“”“”/
function bindJQuery() {
jQuery = window.jQuery, jQuery ? (jqLite = jQuery, extend(jQuery.fn, {
//如果没有未引用jquery 就使用angular jQlite 库
scope: JQLitePrototype.scope,
isolateScope: JQLitePrototype.isolateScope,
controller: JQLitePrototype.controller,
injector: JQLitePrototype.injector,
inheritedData: JQLitePrototype.inheritedData
}), jqLitePatchJQueryRemove("remove", !0, !0, !1), jqLitePatchJQueryRemove("empty", !1, !1, !1), jqLitePatchJQueryRemove("html", !1, !1, !0)) : jqLite = JQLite, angular.element = jqLite
}
/**********************追加公共方法*****************************/
function publishExternalAPI(angular) {
extend(angular, {
bootstrap: bootstrap,
copy: copy,
extend: extend,
equals: equals,
element: jqLite,
forEach: forEach,
injector: createInjector,
noop: noop,
bind: bind,
toJson: toJson,
fromJson: fromJson,
identity: identity,
isUndefined: isUndefined,
isDefined: isDefined,
isString: isString,
isFunction: isFunction,
isObject: isObject,
isNumber: isNumber,
isElement: isElement,
isArray: isArray,
version: version,
isDate: isDate,
lowercase: lowercase,
uppercase: uppercase,
callbacks: {
counter: 0
},
$$minErr: minErr,
$$csp: csp }), angularModule = setupModuleLoader(window);
try {
angularModule("ngLocale")
} catch (e) {
angularModule("ngLocale", []).provider("$locale", $LocaleProvider)
}
angularModule("ng", ["ngLocale"], ["$provide",
function($provide) {
$provide.provider("$compile", $CompileProvider).directive({
a: htmlAnchorDirective,
input: inputDirective,
textarea: inputDirective,
form: formDirective,
script: scriptDirective,
select: selectDirective,
style: styleDirective,
option: optionDirective,
ngBind: ngBindDirective,
ngBindHtml: ngBindHtmlDirective,
ngBindTemplate: ngBindTemplateDirective,
ngClass: ngClassDirective,
ngClassEven: ngClassEvenDirective,
ngClassOdd: ngClassOddDirective,
ngCloak: ngCloakDirective,
ngController: ngControllerDirective,
ngForm: ngFormDirective,
ngHide: ngHideDirective,
ngIf: ngIfDirective,
ngInclude: ngIncludeDirective,
ngInit: ngInitDirective,
ngNonBindable: ngNonBindableDirective,
ngPluralize: ngPluralizeDirective,
ngRepeat: ngRepeatDirective,
ngShow: ngShowDirective,
ngStyle: ngStyleDirective,
ngSwitch: ngSwitchDirective,
ngSwitchWhen: ngSwitchWhenDirective,
ngSwitchDefault: ngSwitchDefaultDirective,
ngOptions: ngOptionsDirective,
ngTransclude: ngTranscludeDirective,
ngModel: ngModelDirective,
ngList: ngListDirective,
ngChange: ngChangeDirective,
required: requiredDirective,
ngRequired: requiredDirective,
ngValue: ngValueDirective }).directive(ngAttributeAliasDirectives).directive(ngEventDirectives), $provide.provider({
$anchorScroll: $AnchorScrollProvider,
$animate: $AnimateProvider,
$browser: $BrowserProvider,
$cacheFactory: $CacheFactoryProvider,
$controller: $ControllerProvider,
$document: $DocumentProvider,
$exceptionHandler: $ExceptionHandlerProvider,
$filter: $FilterProvider,
$interpolate: $InterpolateProvider,
$interval: $IntervalProvider,
$http: $HttpProvider,
$httpBackend: $HttpBackendProvider,
$location: $LocationProvider,
$log: $LogProvider,
$parse: $ParseProvider,
$rootScope: $RootScopeProvider,
$q: $QProvider,
$sce: $SceProvider,
$sceDelegate: $SceDelegateProvider,
$sniffer: $SnifferProvider,
$templateCache: $TemplateCacheProvider,
$timeout: $TimeoutProvider,
$window: $WindowProvider })
}
])
}
方法体中的setupModuleLoader方法是一个模块加载器,这也是一个关键方法, 主要作用是创建和获取模块,代码见417行
function setupModuleLoader(window) {
function ensure(obj, name, factory) {
return obj[name] || (obj[name] = factory())
}
var $injectorMinErr = minErr("$injector"),
ngMinErr = minErr("ng");
return ensure(ensure(window, "angular", Object), "module", function() {
var modules = {};
return function(name, requires, configFn) {
var assertNotHasOwnProperty = function(name, context) {
if ("hasOwnProperty" === name) throw ngMinErr("badname", "hasOwnProperty is not a valid {0} name", context)
};
return assertNotHasOwnProperty(name, "module"), requires && modules.hasOwnProperty(name) && (modules[name] = null), ensure(modules, name, function() {
function invokeLater(provider, method, insertMethod) {
return function() {
return invokeQueue[insertMethod || "push"]([provider, method, arguments]), moduleInstance }
}
if (!requires) throw $injectorMinErr("nomod", "Module ‘{0}‘ is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.", name);
var invokeQueue = [],
runBlocks = [],
config = invokeLater("$injector", "invoke"),
moduleInstance = {
_invokeQueue: invokeQueue,
_runBlocks: runBlocks,
requires: requires,
name: name,
provider: invokeLater("$provide", "provider"),
factory: invokeLater("$provide", "factory"),
service: invokeLater("$provide", "service"),
value: invokeLater("$provide", "value"),
constant: invokeLater("$provide", "constant", "unshift"),
animation: invokeLater("$animateProvider", "register"),
filter: invokeLater("$filterProvider", "register"),
controller: invokeLater("$controllerProvider", "register"),
directive: invokeLater("$compileProvider", "directive"),
config: config,
run: function(block) {
return runBlocks.push(block), this
}
};
return configFn && config(configFn), moduleInstance })
}
})
}
上面publishExternalAPI 方法中的angularModule = setupModuleLoader(window);是在window下面创建全局的angular对象,并且返回一个高阶函数，赋值给了angular.module属性,所以一般我们创建模块都是用angular.module方法.这里的angularModule其实就是相当于angular.module
angular.module在创建模块的时候，传递一个参数的时候,是获取模块;传递一个以上的是创建新模块;该方法返回的是一个moduleInstance对象,它的任务就是来创建控制器,服务,指令,以及配置方法,全局运行方法,而且是链式调用,因为每个方法都会返回moduleInstance,看这里
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原文地址：http://my.oschina.net/u/998304/blog/406417
