support advanced rule execution for iframes

Author: Abhishek Bindra

lib/core/public/run-rules.js

@@ -1,3 +1,4 @@
+/*global a11yEngine*/
 import Context from '../base/context';
 import teardown from './teardown';
 import {
@@ -36,6 +37,12 @@ export default function runRules(context, options, resolve, reject) {
     performanceTimer.auditStart();
   }
 
+  if (options.a11yEngineConfig && options.a11yEngineConfig.advancedRun) {
+    // do a11yEngine setup for iframe
+    console.log('>>> iframe detected, initiating setup ...');
+    a11yEngine.setup(options.a11yEngineConfig);
+  }
+
   if (context.frames.length && options.iframes !== false) {
     q.defer((res, rej) => {
       collectResultsFromFrames(context, options, 'rules', null, res, rej);

lib/core/utils/collect-results-from-frames.js

@@ -22,6 +22,11 @@ export default function collectResultsFromFrames(
   // elementRefs can't be passed across frame boundaries
   options = { ...options, elementRef: false };
 
+  // check a11yengine advance run flag
+  if (options.a11yEngineConfig && !options.a11yEngineConfig.advancedRun) {
+    options.a11yEngineConfig.advancedRun = true;
+  }
+
   var q = queue();
   var frames = parentContent.frames;