CODEWITHSUNDEEP
javascriptangularjsrecursion
RamblerToning
RamblerToning

Reputation: 976

Angular recursive ng-include while keeping track of recursion depth

I have a situation that is pretty similar to this answer to the question here:

AngularJS ng-include with nested hierarchy

I have some data in the format 

 $scope.data = {
text: "blah",
comments: 
[
  {
    text: ["blahL11", "blahL12", "blahL13"],
    comments: [
      { 
        text: ["blahL111", "blahL112", "blahL113"] 
      },
      { 
        text: ["blahR111", "blahR112", "blahR113"] 
      }
    ]
  },
  {
    text: ["blahR11", "blahR12", "blahR13"] 
  }
]

};

And I am display it with a recursive ng-include like this: 

  <ul>
   <li>{{data.text}}</li>
   <li ng-repeat="item in data.comments" ng-include="'tree'"></li>
 </ul>

 <script type="text/ng-template" id="tree">
  <ul>
    <li ng-repeat="text in item.text">{{text}}</li>
    <li ng-repeat="item in item.comments" ng-include="'tree'"></li>
  </ul>
</script>

http://plnkr.co/edit/8swLos2V6QRz6ct6GDGb?p=info

However, I would like to somehow keep track of the depth of the recursion as well. So that instead of simply displaying: 

-blah
    -blahL11
    -blahL12
    -blahL13
            -blahL111

It could display 

-1. blah    
    -2. blahL11
    -2. blahL12
    -2. blahL13
        -3. blahL111

Without me modifying the data structure (as the depth is only really for display?). Can I insert a variable into the ng-include, is there some sort of recursive $index I can use?

Upvotes: 5

Views: 2268

Answers (1)

James Brierley
James Brierley

Reputation: 4670

You can do this using ng-init. This will assign a value to the new scope when it's created, which you can do by refering to a value in the old scope and incrementing it.

plnkr demo

<li ng-repeat="item in item.comments" ng-include="'tree'" ng-init="depth = depth + 1"></li>

Upvotes: 4

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