From afc58f863564015f0ec7d6aa36c303a711290112 Mon Sep 17 00:00:00 2001
From: Di Zhang
If candidate is a reading flow item or - null, direction is forward, and starting point is in a - reading-flow focus navigation scope scope, then let new - candidate be the result of running the reading flow sequential navigation search - algorithm with candidate as the first argument, direction as the - second, and starting point's focus navigation scope as the third.
- -If starting point is a reading flow item, - direction is backward, and starting point is in a - reading-flow focus navigation scope scope, then let new - candidate be the result of running the reading flow sequential navigation search - algorithm with starting point as the first argument, direction as - the second, and starting point's focus navigation scope as the third.
-If candidate is a reading flow item or + null, direction is forward, and starting point is in a + reading-flow focus navigation scope scope, then let new + candidate be the result of running the reading flow sequential navigation search + algorithm given candidate, direction, and starting + point's focus navigation scope.
If starting point is a reading flow + item, direction is backward, and starting point is in a + reading-flow focus navigation scope scope, then let new + candidate be the result of running the reading flow sequential navigation search + algorithm given starting point, direction, and starting + point's focus navigation scope.
If candidate is a navigable container with a non-null content