From 240933c531cd41334d4716c8b0549e792b66ae0f Mon Sep 17 00:00:00 2001
From: Alexandre Silva <amsilva@infoportugal.impresa.pt>
Date: Wed, 8 Mar 2017 12:45:25 +0000
Subject: [PATCH] Auto-population for slug is made using the same behaviour as
 wagtail (only auto-populated in non-live pages and slug only follows the
 title field if its value matched the title's value at the time of focus).
 Fixes #54.

---
 .../js/wagtail_translated_slugs.js            | 31 ++++++++++++-------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/wagtail_modeltranslation/static/wagtail_modeltranslation/js/wagtail_translated_slugs.js b/wagtail_modeltranslation/static/wagtail_modeltranslation/js/wagtail_translated_slugs.js
index 5626714..ea14a69 100644
--- a/wagtail_modeltranslation/static/wagtail_modeltranslation/js/wagtail_translated_slugs.js
+++ b/wagtail_modeltranslation/static/wagtail_modeltranslation/js/wagtail_translated_slugs.js
@@ -1,15 +1,22 @@
-$(document).ready(function() {
-    $.each(langs, function(idx, lang_code){
-        $('#id_title_'+lang_code).on('focus', function() {
-            $('#id_slug_'+lang_code).data('previous-val', $('#id_slug_'+lang_code).val());
-            $(this).data('previous-val', $(this).val());
-        });
+$(document).ready(function () {
+    /* Only non-live pages should auto-populate the slug from the title */
+    if (!$('body').hasClass('page-is-live')) {
+        var slugFollowsTitle = false;
 
-        $('#id_title_'+lang_code).on('keyup keydown keypress blur', function() {
-            if ($('body').hasClass('create') || (!$('#id_slug_'+lang_code).data('previous-val').length || cleanForSlug($('#id_title_'+lang_code).data('previous-val')) === $('#id_slug_'+lang_code).data('previous-val'))) {
-                // only update slug if the page is being created from scratch, if slug is completely blank, or if title and slug prior to typing were identical
-                $('#id_slug_'+lang_code).val(cleanForSlug($('#id_title_'+lang_code).val()));
-            }
+        $.each(langs, function (idx, lang_code) {
+            $('#id_title_' + lang_code).on('focus', function () {
+                /* slug should only follow the title field if its value matched the title's value at the time of focus */
+                var currentSlug = $('#id_slug_' + lang_code).val();
+                var slugifiedTitle = cleanForSlug(this.value);
+                slugFollowsTitle = (currentSlug == slugifiedTitle);
+            });
+
+            $('#id_title_' + lang_code).on('keyup keydown keypress blur', function () {
+                if (slugFollowsTitle) {
+                    var slugifiedTitle = cleanForSlug(this.value);
+                    $('#id_slug_' + lang_code).val(slugifiedTitle);
+                }
+            });
         });
-    });
+    }
 });
\ No newline at end of file