From 7a2527aed1694f86bf6f430b86043d3e25049e56 Mon Sep 17 00:00:00 2001
From: Steve Howell <showell@zulipchat.com>
Date: Tue, 4 Dec 2018 18:08:26 +0000
Subject: [PATCH] hashchange: Call stop_auto_scrolling() directly.

---
 frontend_tests/node_tests/hashchange.js | 33 +++++++++----------------
 static/js/hashchange.js                 |  4 +--
 static/js/message_list.js               |  2 +-
 3 files changed, 14 insertions(+), 25 deletions(-)

diff --git a/frontend_tests/node_tests/hashchange.js b/frontend_tests/node_tests/hashchange.js
index babe0c8792f41..6c87eed8e5ac5 100644
--- a/frontend_tests/node_tests/hashchange.js
+++ b/frontend_tests/node_tests/hashchange.js
@@ -17,6 +17,7 @@ set_global('drafts', {});
 set_global('favicon', {});
 set_global('floating_recipient_bar', {});
 set_global('info_overlay', {});
+set_global('message_viewport', {});
 set_global('narrow', {});
 set_global('overlays', {});
 set_global('settings', {});
@@ -113,17 +114,6 @@ run_test('people_slugs', () => {
     assert.equal(hash, '#narrow/pm-with/42-alice');
 });
 
-function stub_trigger(f) {
-    set_global('$', () => {
-        return {
-            trigger: f,
-        };
-    });
-    $.Event = (name) => {
-        assert.equal(name, 'zuliphashchange.zulip');
-    };
-}
-
 function test_helper() {
     var events = [];
     var narrow_terms;
@@ -138,14 +128,13 @@ function test_helper() {
     stub('drafts', 'launch');
     stub('favicon', 'reset');
     stub('floating_recipient_bar', 'update');
+    stub('message_viewport', 'stop_auto_scrolling');
     stub('narrow', 'deactivate');
     stub('overlays', 'close_for_hash_change');
     stub('settings', 'setup_page');
     stub('subs', 'launch');
     stub('ui_util', 'blur_active_element');
 
-    stub_trigger(() => { events.push('trigger event'); });
-
     ui_util.change_tab_to = (hash) => {
         events.push('change_tab_to ' + hash);
     };
@@ -181,7 +170,7 @@ run_test('hash_interactions', () => {
     hashchange.initialize();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'change_tab_to #home',
         'narrow.deactivate',
         'floating_recipient_bar.update',
@@ -191,7 +180,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'change_tab_to #home',
         'narrow.deactivate',
         'floating_recipient_bar.update',
@@ -203,7 +192,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'change_tab_to #home',
         'narrow.activate',
         'floating_recipient_bar.update',
@@ -217,7 +206,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'change_tab_to #home',
         'narrow.activate',
         'floating_recipient_bar.update',
@@ -240,7 +229,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'info: keyboard-shortcuts',
     ]);
 
@@ -250,7 +239,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'info: message-formatting',
     ]);
 
@@ -260,7 +249,7 @@ run_test('hash_interactions', () => {
     window.onhashchange();
     helper.assert_events([
         'overlays.close_for_hash_change',
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'info: search-operators',
     ]);
 
@@ -316,7 +305,7 @@ run_test('save_narrow', () => {
 
     hashchange.save_narrow(operators);
     helper.assert_events([
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'favicon.reset',
     ]);
     assert.equal(window.location.hash, '#narrow/is/private');
@@ -333,7 +322,7 @@ run_test('save_narrow', () => {
     helper.clear_events();
     hashchange.save_narrow(operators);
     helper.assert_events([
-        'trigger event',
+        'message_viewport.stop_auto_scrolling',
         'favicon.reset',
     ]);
     assert.equal(url_pushed, 'http://example.com/#narrow/is/starred');
diff --git a/static/js/hashchange.js b/static/js/hashchange.js
index 0bf46778163a3..eb7c6b5291594 100644
--- a/static/js/hashchange.js
+++ b/static/js/hashchange.js
@@ -34,7 +34,7 @@ exports.changehash = function (newhash) {
     if (changing_hash) {
         return;
     }
-    $(document).trigger($.Event('zuliphashchange.zulip'));
+    message_viewport.stop_auto_scrolling();
     set_hash(newhash);
     favicon.reset();
 };
@@ -96,7 +96,7 @@ function do_hashchange_normal(from_reload) {
         return false;
     }
 
-    $(document).trigger($.Event('zuliphashchange.zulip'));
+    message_viewport.stop_auto_scrolling();
 
     // NB: In Firefox, window.location.hash is URI-decoded.
     // Even if the URL bar says #%41%42%43%44, the value here will
diff --git a/static/js/message_list.js b/static/js/message_list.js
index 7240b8b66f316..fcaf3e7471dd6 100644
--- a/static/js/message_list.js
+++ b/static/js/message_list.js
@@ -428,7 +428,7 @@ exports.all = new exports.MessageList({
 // doing something.  Be careful, though, if you try to capture
 // mousemove, then you will have to contend with the autoscroll
 // itself generating mousemove events.
-$(document).on('message_selected.zulip zuliphashchange.zulip wheel', function () {
+$(document).on('message_selected.zulip wheel', function () {
     message_viewport.stop_auto_scrolling();
 });