From d1ac1286b7b234c7e221f34638b37e304608d02c Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Wed, 7 Dec 2016 09:43:11 -0500
Subject: [PATCH] addendum to fix for #2206: auto scroll to the end of user
 filters text box

---
 src/js/1p-filters.js | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/src/js/1p-filters.js b/src/js/1p-filters.js
index 307a70e4f..77ba95581 100644
--- a/src/js/1p-filters.js
+++ b/src/js/1p-filters.js
@@ -36,22 +36,29 @@ var cachedUserFilters = '';
 
 // This is to give a visual hint that the content of user blacklist has changed.
 
-function userFiltersChanged() {
-    var changed = uDom.nodeFromId('userFilters').value.trim() !== cachedUserFilters;
+function userFiltersChanged(changed) {
+    if ( typeof changed !== 'boolean' ) {
+        changed = uDom.nodeFromId('userFilters').value.trim() !== cachedUserFilters;
+    }
     uDom.nodeFromId('userFiltersApply').disabled = !changed;
     uDom.nodeFromId('userFiltersRevert').disabled = !changed;
 }
 
 /******************************************************************************/
 
-function renderUserFilters() {
+function renderUserFilters(first) {
     var onRead = function(details) {
-        if ( details.error ) {
-            return;
-        }
+        if ( details.error ) { return; }
+        var textarea = uDom.nodeFromId('userFilters');
         cachedUserFilters = details.content.trim();
-        uDom.nodeFromId('userFilters').value = details.content;
-        userFiltersChanged();
+        textarea.value = details.content;
+        if ( first ) {
+            textarea.value += '\n';
+            var textlen = textarea.value.length;
+            textarea.setSelectionRange(textlen, textlen);
+            textarea.focus();
+        }
+        userFiltersChanged(false);
     };
     messaging.send('dashboard', { what: 'readUserFilters' }, onRead);
 }
@@ -195,7 +202,7 @@ uDom('#userFilters').on('input', userFiltersChanged);
 uDom('#userFiltersApply').on('click', applyChanges);
 uDom('#userFiltersRevert').on('click', revertChanges);
 
-renderUserFilters();
+renderUserFilters(true);
 
 /******************************************************************************/