Fix random double page reload (#451)

fixes buunguyen/octotree#342

src/constants.js

@@ -41,5 +41,6 @@ const EVENT = {
   OPTS_CHANGE   : 'octotree:change',
   VIEW_READY    : 'octotree:ready',
   VIEW_CLOSE    : 'octotree:close',
-  FETCH_ERROR   : 'octotree:error'
+  FETCH_ERROR   : 'octotree:error',
+  PJAX_RELOAD   : 'pjax:reload'
 }

src/octotree.js

@@ -72,6 +72,7 @@ $(document).ready(() => {
       .on(EVENT.LAYOUT_CHANGE, layoutChanged)
       .on(EVENT.TOGGLE, layoutChanged)
       .on(EVENT.LOC_CHANGE, () => tryLoadRepo())
+      .on(EVENT.PJAX_RELOAD, (e) => e.preventDefault())
 
     $sidebar
       .width(parseInt(store.get(STORE.WIDTH)))