From 51ad6d006c28ba7bdc1160ada42a90754958d653 Mon Sep 17 00:00:00 2001
From: Bryan Housel <bryan@mapbox.com>
Date: Fri, 18 Sep 2015 11:55:09 -0400
Subject: [PATCH] Disable save button when changeset comment is empty (closes
 #1488)

---
 js/id/ui/commit.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/js/id/ui/commit.js b/js/id/ui/commit.js
index e70606844..8c7121dc2 100644
--- a/js/id/ui/commit.js
+++ b/js/id/ui/commit.js
@@ -38,7 +38,11 @@ iD.ui.Commit = function(context) {
             .attr('placeholder', t('commit.description_placeholder'))
             .attr('maxlength', 255)
             .property('value', context.storage('comment') || '')
-            .on('blur.save', function () {
+            .on('input.save', function() {
+                d3.selectAll('.save-section .save-button')
+                    .attr('disabled', (this.value.length ? null : true));
+            })
+            .on('blur.save', function() {
                 context.storage('comment', this.value);
             });
 
@@ -117,7 +121,11 @@ iD.ui.Commit = function(context) {
             .attr('class','buttons fillL cf');
 
         var saveButton = buttonSection.append('button')
-            .attr('class', 'action col5 button')
+            .attr('class', 'action col5 button save-button')
+            .attr('disabled', function() {
+                var n = d3.select('.commit-form textarea').node();
+                return (n && n.value.length) ? null : true;
+            })
             .on('click.save', function() {
                 dispatch.save({
                     comment: commentField.node().value
@@ -129,7 +137,7 @@ iD.ui.Commit = function(context) {
             .text(t('commit.save'));
 
         var cancelButton = buttonSection.append('button')
-            .attr('class', 'action col5 button')
+            .attr('class', 'action col5 button cancel-button')
             .on('click.cancel', function() { dispatch.cancel(); });
 
         cancelButton.append('span')