fixed drafty's handling of undefined values

README.md

@@ -6,7 +6,7 @@ and [icons](https://google.github.io/material-design-icons/#icon-font-for-the-we
 
 This is work in progress. Bugs are expected. The app was tested in the latest Chrome & Firefox only.
 
-Try it (possibly older version) live at http://api.tinode.co/x/example-react-js/. Login as one of `alice`, `bob`, `carol`, `dave`, `frank`. Password is `<login>123`, e.g. password for `alice` is `alice123`. You can discover other users by email or phone by prefixing them with `email:` or `tel:` respectively. Emails are `<login>@example.com`, e.g. `alice@example.com`, phones are `17025550001` through `17025550009`. The demo is reset every night at 2:15 am Pacific time.
+Try it (possibly newer or older version) live at https://api.tinode.co/x/example-react-js/. Login as one of `alice`, `bob`, `carol`, `dave`, `frank`. Password is `<login>123`, e.g. password for `alice` is `alice123`. You can discover other users by email or phone by prefixing them with `email:` or `tel:` respectively. Emails are `<login>@example.com`, e.g. `alice@example.com`, phones are `17025550001` through `17025550009`. The demo is reset every night at 2:15 am Pacific time.
 
 License: [Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0)
 

drafty.js

@@ -507,6 +507,12 @@ Sample JSON representation of the text above:
 
         var spans = [].concat(fmt);
 
+        // Zero values may have been stripped. Restore them.
+        spans.map(function(s) {
+          s.at = s.at || 0;
+          s.len = s.len || 0;
+        });
+
         // Soft spans first by start index (asc) then by length (desc).
         spans.sort(function(a, b) {
           if (a.at - b.at == 0) {
@@ -515,18 +521,23 @@ Sample JSON representation of the text above:
           return a.at - b.at;
         });
 
+        console.log(spans);
+
         // Denormalize entities into spans. Create a copy of the objects to leave
         // original Drafty object unchanged.
         spans = spans.map(function(s) {
           var data;
           var tp = s.tp;
-          if (s.key + 1 > 0) {
+          if (!tp) {
+            s.key = s.key || 0;
             data = ent[s.key].data;
             tp = ent[s.key].tp;
           }
           return {tp: tp, data: data, at: s.at, len: s.len};
         });
 
+        console.log(spans);
+
         return forEach(txt, 0, txt.length, spans, formatter, context);
       },