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'use strict';
/**
* !!! This is an undocumented "private" service !!!
*
* @name ng.$sniffer
* @requires $window
* @requires $document
*
* @property {boolean} history Does the browser support html5 history api ?
* @property {boolean} hashchange Does the browser support hashchange event ?
* @property {boolean} supportsTransitions Does the browser support CSS transition events ?
*
* @description
* This is very simple implementation of testing browser's features.
*/
function $SnifferProvider() {
this.$get = ['$window', '$document', function($window, $document) {
var eventSupport = {},
android = int((/android (\d+)/.exec(lowercase(($window.navigator || {}).userAgent)) || [])[1]),
document = $document[0] || {},
vendorPrefix,
vendorRegex = /^(Moz|webkit|O|ms)(?=[A-Z])/,
bodyStyle = document.body && document.body.style,
transitions = false,
match;
if (bodyStyle) {
for(var prop in bodyStyle) {
if(match = vendorRegex.exec(prop)) {
vendorPrefix = match[0];
vendorPrefix = vendorPrefix.substr(0, 1).toUpperCase() + vendorPrefix.substr(1);
break;
}
}
transitions = !!(vendorPrefix + 'Transition' in bodyStyle);
}
return {
// Android has history.pushState, but it does not update location correctly
// so let's not use the history API at all.
// http://code.google.com/p/android/issues/detail?id=17471
// https://github.com/angular/angular.js/issues/904
history: !!($window.history && $window.history.pushState && !(android < 4)),
hashchange: 'onhashchange' in $window &&
// IE8 compatible mode lies
(!document.documentMode || document.documentMode > 7),
hasEvent: function(event) {
// IE9 implements 'input' event it's so fubared that we rather pretend that it doesn't have
// it. In particular the event is not fired when backspace or delete key are pressed or
// when cut operation is performed.
if (event == 'input' && msie == 9) return false;
if (isUndefined(eventSupport[event])) {
var divElm = document.createElement('div');
eventSupport[event] = 'on' + event in divElm;
}
return eventSupport[event];
},
csp: document.securityPolicy ? document.securityPolicy.isActive : false,
vendorPrefix: vendorPrefix,
supportsTransitions : transitions
};
}];
}
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