MDL-35980 comment: add comment info to delete button for screen readers

For each delete button in the comments widget, make the spoken text a
string containing the name of the poster and the datetime.

admin/tool/lp/templates/comment_area.mustache

@@ -93,7 +93,7 @@ require(['core/str'], function(Str) {
         { key: 'comments', component: 'moodle' },
         { key: 'commentscount', component: 'moodle' },
         { key: 'commentsrequirelogin', component: 'moodle' },
-        { key: 'deletecomment', component: 'moodle' },
+        { key: 'deletecommentbyon', component: 'moodle' },
     ]).then(function() {
         // Kick off when strings are loaded.
         Y.use('core_comment', function(Y) {

comment/comment.js

@@ -192,7 +192,17 @@ M.core_comment = {
                         val = val.replace('___name___', list[i].fullname);
                     }
                     if (list[i]['delete']||newcmt) {
-                        list[i].content = '<div class="comment-delete"><a href="#" id ="comment-delete-'+this.client_id+'-'+list[i].id+'" title="'+M.util.get_string('deletecomment', 'moodle')+'"><img alt="" src="'+M.util.image_url('t/delete', 'core')+'" /></a></div>' + list[i].content;
+                        var tokens = {
+                            user: list[i].fullname,
+                            time: list[i].time
+                        };
+                        var deleteStr = Y.Escape.html(M.util.get_string('deletecommentbyon', 'moodle', tokens));
+                        list[i].content = '<div class="comment-delete">' +
+                            '<a href="#" role="button" id ="comment-delete-' + this.client_id + '-' + list[i].id + '"' +
+                            '   title="' + deleteStr + '">' +
+                            '<img alt="' + deleteStr + '" src="' + M.util.image_url('t/delete', 'core') + '" />' +
+                            '</a>' +
+                            '</div>' + list[i].content;
                     }
                     val = val.replace('___time___', list[i].time);
                     val = val.replace('___picture___', list[i].avatar);

comment/lib.php

@@ -263,7 +263,7 @@ public static function init(moodle_page $page = null) {
                 'comments',
                 'commentscount',
                 'commentsrequirelogin',
-                'deletecomment',
+                'deletecommentbyon',
             ),
             'moodle'
         );

lang/en/moodle.php

@@ -466,6 +466,7 @@
 $string['deletecategorycheck'] = 'Are you absolutely sure you want to completely delete this category <b>\'{$a}\'</b>?<br />This will move all courses into the parent category if there is one, or into Miscellaneous.';
 $string['deletecategorycheck2'] = 'If you delete this category, you need to choose what to do with the courses and subcategories it contains.';
 $string['deletecomment'] = 'Delete this comment';
+$string['deletecommentbyon'] = 'Delete comment posted by {$a->user} on {$a->time}';
 $string['deletecompletely'] = 'Delete completely';
 $string['deletecourse'] = 'Delete a course';
 $string['deletecoursecheck'] = 'Are you absolutely sure you want to completely delete this course and all the data it contains?';

lib/outputrequirementslib.php

@@ -747,7 +747,7 @@ protected function find_module($component) {
                 case 'core_comment':
                     $module = array('name'     => 'core_comment',
                                     'fullpath' => '/comment/comment.js',
-                                    'requires' => array('base', 'io-base', 'node', 'json', 'yui2-animation', 'overlay'),
+                                    'requires' => array('base', 'io-base', 'node', 'json', 'yui2-animation', 'overlay', 'escape'),
                                     'strings' => array(array('confirmdeletecomments', 'admin'), array('yes', 'moodle'), array('no', 'moodle'))
                                 );
                     break;