src/ng/directive/ngCsp.js

'use strict';

/**
 * @ngdoc directive
 * @name ng.directive:ngCsp
 * @priority 1000
 *
 * @element html
 * @description
 * Enables [CSP (Content Security Policy)](https://developer.mozilla.org/en/Security/CSP) support.
 * 
 * This is necessary when developing things like Google Chrome Extensions.
 * 
 * CSP forbids apps to use `eval` or `Function(string)` generated functions (among other things).
 * For us to be compatible, we just need to implement the "getterFn" in $parse without violating
 * any of these restrictions.
 * 
 * AngularJS uses `Function(string)` generated functions as a speed optimization. By applying `ngCsp`
 * it is be possible to opt into the CSP compatible mode. When this mode is on AngularJS will
 * evaluate all expressions up to 30% slower than in non-CSP mode, but no security violations will
 * be raised.
 * 
 * In order to use this feature put `ngCsp` directive on the root element of the application.
 * 
 * @example
 * This example shows how to apply the `ngCsp` directive to the `html` tag.
   <pre>
     <!doctype html>
     <html ng-app ng-csp>
     ...
     ...
     </html>
   </pre>
 */

var ngCspDirective = ['$sniffer', function($sniffer) {
  return {
    priority: 1000,
    compile: function() {
      $sniffer.csp = true;
    }
  };
}];