Include symbols in main typeahead

Summary:
  - Include symbols in main typeahead results.
  - Simplify the symbol query a bit and extend PhabricatorOffsetPagedQuery. There was some stuff around language ranking that I got rid of, I think the theory there was that mapping file extensions to languages might not work in general but I think it works fine in practice, and we have more config stuff now around guessing languages and getting the mappings right.
  - Make it easier to debug the typeahead by showing the results in page format for non-ajax requests.
  - When we have too many results, show only the top few of each type.

Depends on D3116, D3117

Test Plan: Used typeahead, got symbols in results. Hit endpoint with non-ajax, got useful debug view.

Reviewers: btrahan, vrana

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1569

Differential Revision: https://secure.phabricator.com/D3118

webroot/rsrc/js/application/core/behavior-search-typeahead.js

@@ -53,7 +53,8 @@ JX.behavior('phabricator-search-typeahead', function(config) {
     var type_priority = {
       // TODO: Put jump nav hits like "D123" first.
       'apps' : 2,
-      'user' : 3
+      'user' : 3,
+      'symb' : 4
     };
 
     var tokens = this.tokenize(value);
@@ -85,9 +86,31 @@ JX.behavior('phabricator-search-typeahead', function(config) {
 
       return cmp(u, v);
     });
+
+    // If we have more results than fit, limit each type of result to 3, so
+    // we show 3 applications, then 3 users, etc.
+    var type_count = 0;
+    var current_type = null;
+    for (var ii = 0; ii < list.length; ii++) {
+      if (list.length <= config.limit) {
+        break;
+      }
+      if (list[ii].type != current_type) {
+        current_type = list[ii].type;
+        type_count = 1;
+      } else {
+        type_count++;
+        if (type_count > 3) {
+          list.splice(ii, 1);
+          ii--;
+        }
+      }
+    }
+
   };
 
   datasource.setSortHandler(JX.bind(datasource, sort_handler));
+  datasource.setMaximumResultCount(config.limit);
 
   var typeahead = new JX.Typeahead(JX.$(config.id), JX.$(config.input));
   typeahead.setDatasource(datasource);