Fix time travel by adding new near: operator.

(imported from commit 727a68016090164b586cbe59e692676a00e8cd3a)

static/js/narrow.js

@@ -119,6 +119,9 @@ Filter.prototype = {
                     }
                     break;
 
+                case 'near':
+                    return true;
+
                 case 'stream':
                     if (message.type !== 'stream')
                         return false;
@@ -333,6 +336,7 @@ exports.activate = function (operators, opts) {
     if (operators.length === 0) {
         return exports.deactivate();
     }
+    var filter = new Filter(operators);
 
     opts = _.defaults({}, opts, {
         then_select_id: home_msg_list.selected_id(),
@@ -340,6 +344,10 @@ exports.activate = function (operators, opts) {
         change_hash: true,
         trigger: 'unknown'
     });
+    if (filter.has_operator("near")) {
+        opts.then_select_id = filter.operands("near")[0];
+        opts.select_first_unread = false;
+    }
 
     if (opts.then_select_id === -1) {
         // If we're loading the page via a narrowed URL, we may not
@@ -366,7 +374,7 @@ exports.activate = function (operators, opts) {
         message_tour.start_tour(current_msg_list.selected_id());
     }
 
-    current_filter = new Filter(operators);
+    current_filter = filter;
 
     // Save how far from the pointer the top of the message list was.
     if (current_msg_list.selected_id() !== -1) {
@@ -504,7 +512,7 @@ exports.by_recipient = function (target_id, opts) {
 
 exports.by_time_travel = function (target_id, opts) {
     opts = _.defaults({}, opts, {then_select_id: target_id});
-    narrow.activate([], opts);
+    narrow.activate([["near", target_id]], opts);
 };
 
 exports.deactivate = function () {

static/js/search.js

@@ -68,6 +68,9 @@ function describe(operators) {
         case 'stream':
             return 'Narrow to stream ' + operand;
 
+        case 'near':
+            return 'Narrow to messages around ' + operand;
+
         case 'topic':
             return 'Narrow to topic ' + operand;
 

static/js/tab_bar.js

@@ -52,6 +52,8 @@ function make_tab_data() {
 
         } else if (filter.has_operand("is", "starred")) {
             tabs.push(make_tab("Starred", hashed));
+        } else if (filter.has_operator("near")) {
+            tabs.push(make_tab("Near " + filter.operands("near")[0], hashed));
         } else if (filter.has_operand("is", "mentioned")) {
             tabs.push(make_tab("Mentions", hashed));
         } else if (filter.has_operator("sender")) {

zephyr/views.py

@@ -713,6 +713,9 @@ class NarrowBuilder(object):
     def by_sender(self, operand):
         return self.pQ(sender__email__iexact=operand)
 
+    def by_near(self, operand):
+        return Q()
+
     def by_pm_with(self, operand):
         if ',' in operand:
             # Huddle