Browser对象
function Browser(window, document, $log, $sniffer) {
var self = this;
var urlChangeListeners = [],
urlChangeInit = false;
function fireUrlChange() {
if (lastBrowserUrl == self.url()) return;
lastBrowserUrl = self.url();
forEach(urlChangeListeners, function(listener) {
listener(self.url());
});
}
self.onUrlChange = function(callback) {
if (!urlChangeInit) {
// html5 history api - popstate event
if ($sniffer.history) jqLite(window).bind('popstate', fireUrlChange);
// hashchange event
if ($sniffer.hashchange) jqLite(window).bind('hashchange', fireUrlChange);
// polling settimeout 100
else self.addPollFn(fireUrlChange);
urlChangeInit = true;
}
}
}
$BrowserProvider
function $BrowserProvider(){
this.$get = ['$window', '$log', '$sniffer', '$document',
function( $window, $log, $sniffer, $document){
return new Browser($window, $document, $log, $sniffer); //这里实例了Browser对象作为提供者返回的对象
}];
}
$LocationProvider
function $LocationProvider() {
this.$get = ['$rootScope', '$browser', '$sniffer', '$rootElement', function( $rootScope, $browser, $sniffer, $rootElement) {
// update $location when $browser url changes
$browser.onUrlChange(function(newUrl) {
if ($location.absUrl() != newUrl) {
if ($rootScope.$broadcast('$locationChangeStart', newUrl, $location.absUrl()).defaultPrevented) {
$browser.url($location.absUrl());
return;
}
$rootScope.$evalAsync(function() {
var oldUrl = $location.absUrl();
$location.$$parse(newUrl);
afterLocationChange(oldUrl);
});
if (!$rootScope.$$phase) $rootScope.$digest();
}
});
}];
}
$RouteProvider
function $RouteProvider() {
this.$get = ['$rootScope', '$location', '$routeParams', '$q', '$injector', '$http', '$templateCache',
function( $rootScope, $location, $routeParams, $q, $injector, $http, $templateCache) {
...
}
];
}
ngViewDirective
var ngViewDirective = ['$http', '$templateCache', '$route', '$anchorScroll', '$compile',
'$controller',
function($http, $templateCache, $route, $anchorScroll, $compile,
$controller) {
return {
restrict: 'ECA',
terminal: true,
link: function(scope, element, attr) {
var lastScope,
onloadExp = attr.onload || '';
scope.$on('$routeChangeSuccess', update);
update();
function destroyLastScope() {
if (lastScope) {
lastScope.$destroy();
lastScope = null;
}
}
function clearContent() {
element.html('');
destroyLastScope();
}
function update() {
var locals = $route.current && $route.current.locals,
template = locals && locals.$template;
if (template) {
element.html(template);
destroyLastScope();
var link = $compile(element.contents()),
current = $route.current,
controller;
lastScope = current.scope = scope.$new();
if (current.controller) {
locals.$scope = lastScope;
controller = $controller(current.controller, locals);
element.children().data('$ngControllerController', controller);
}
link(lastScope);
lastScope.$emit('$viewContentLoaded');
lastScope.$eval(onloadExp);
// $anchorScroll might listen on event...
$anchorScroll();
} else {
clearContent();
}
}
}
};
}];