Add tree.js back and run only if not treeview

app/assets/javascripts/dispatcher.js

@@ -54,6 +54,7 @@ import ShortcutsBlob from './shortcuts_blob';
 import SigninTabsMemoizer from './signin_tabs_memoizer';
 import Star from './star';
 import Todos from './todos';
+import TreeView from './tree';
 import UsagePing from './usage_ping';
 import UsernameValidator from './username_validator';
 import VersionCheckImage from './version_check_image';
@@ -68,6 +69,7 @@ import initNotes from './init_notes';
 import initLegacyFilters from './init_legacy_filters';
 import initIssuableSidebar from './init_issuable_sidebar';
 import GpgBadges from './gpg_badges';
+import FeatureHelper from './helpers/feature_helper';
 
 (function() {
   var Dispatcher;
@@ -323,6 +325,11 @@ import GpgBadges from './gpg_badges';
         case 'projects:show':
           shortcut_handler = new ShortcutsNavigation();
           new NotificationsForm();
+
+          if (FeatureHelper.isNewRepo()) break;
+
+          if ($('#tree-slider').length) new TreeView();
+          if ($('#blob-viewer').length) new BlobViewer();
           break;
         case 'projects:edit':
           setupProjectEdit();
@@ -376,9 +383,22 @@ import GpgBadges from './gpg_badges';
         case 'admin:groups:edit':
           new GroupAvatar();
           break;
+        case 'projects:tree:show':
+          shortcut_handler = new ShortcutsNavigation();
+
+          if (FeatureHelper.isNewRepo()) break;
+
+          new TreeView();
+          new BlobViewer();
+          break;
         case 'projects:find_file:show':
           shortcut_handler = true;
           break;
+        case 'projects:blob:show':
+          if (FeatureHelper.isNewRepo()) break;
+          new BlobViewer();
+          initBlob();
+          break;
         case 'projects:blame:show':
           initBlob();
           break;

app/assets/javascripts/tree.js

+/* eslint-disable func-names, space-before-function-paren, wrap-iife, max-len, quotes, consistent-return, no-var, one-var, one-var-declaration-per-line, no-else-return, prefer-arrow-callback, class-methods-use-this */
+
+export default class TreeView {
+  constructor() {
+    this.initKeyNav();
+    // Code browser tree slider
+    // Make the entire tree-item row clickable, but not if clicking another link (like a commit message)
+    $(".tree-content-holder .tree-item").on('click', function(e) {
+      var $clickedEl, path;
+      $clickedEl = $(e.target);
+      path = $('.tree-item-file-name a', this).attr('href');
+      if (!$clickedEl.is('a') && !$clickedEl.is('.str-truncated')) {
+        if (e.metaKey || e.which === 2) {
+          e.preventDefault();
+          return window.open(path, '_blank');
+        } else {
+          return gl.utils.visitUrl(path);
+        }
+      }
+    });
+    // Show the "Loading commit data" for only the first element
+    $('span.log_loading:first').removeClass('hide');
+  }
+
+  initKeyNav() {
+    var li, liSelected;
+    li = $("tr.tree-item");
+    liSelected = null;
+    return $('body').keydown(function(e) {
+      var next, path;
+      if ($("input:focus").length > 0 && (e.which === 38 || e.which === 40)) {
+        return false;
+      }
+      if (e.which === 40) {
+        if (liSelected) {
+          next = liSelected.next();
+          if (next.length > 0) {
+            liSelected.removeClass("selected");
+            liSelected = next.addClass("selected");
+          }
+        } else {
+          liSelected = li.eq(0).addClass("selected");
+        }
+        return $(liSelected).focus();
+      } else if (e.which === 38) {
+        if (liSelected) {
+          next = liSelected.prev();
+          if (next.length > 0) {
+            liSelected.removeClass("selected");
+            liSelected = next.addClass("selected");
+          }
+        } else {
+          liSelected = li.last().addClass("selected");
+        }
+        return $(liSelected).focus();
+      } else if (e.which === 13) {
+        path = $('.tree-item.selected .tree-item-file-name a').attr('href');
+        if (path) {
+          return gl.utils.visitUrl(path);
+        }
+      }
+    });
+  }
+}