misc: don't accept more than a single exclamation mark in issue subjects

(this could later be changed to refuse them all, one step at a time)

javascripts/theme.js

@@ -77,6 +77,38 @@ function sort_table() {
     $(table).find('tr:first-child td').on('click', sort_table).css('cursor', 'row-resize');
 }
 
+function alter_new_issue_page() {
+  $('input#issue_subject').on('keypress', function(evt) {
+    /* initial code from
+     * https://stackoverflow.com/questions/3579219/show-different-keyboard-character-from-the-typed-one-in-google-chrome/3580352#3580352
+     */
+    var val = this.value;
+    evt = evt || window.event;
+
+    // Ensure we only handle printable keys, excluding enter and space
+    var charCode = typeof evt.which == "number" ? evt.which : evt.keyCode;
+    if (charCode && charCode != 13 && charCode != 32) {
+        var keyChar = String.fromCharCode(charCode);
+        if (keyChar != '!') return true;
+        if (val.indexOf('!') == -1) return true; /* we still allow one */
+
+        var mappedChar = '❤';
+
+        var start, end;
+        if (typeof this.selectionStart == "number" && typeof this.selectionEnd == "number") {
+            // Non-IE browsers and IE 9
+            start = this.selectionStart;
+            end = this.selectionEnd;
+            this.value = val.slice(0, start) + mappedChar + val.slice(end);
+
+            // Move the caret
+            this.selectionStart = this.selectionEnd = start + 1;
+        }
+        return false;
+    }
+  });
+}
+
 $(function() {
   $('.wiki table tr:first-child td').on('click', sort_table).css('cursor', 'row-resize');
 
@@ -84,6 +116,11 @@ $(function() {
   var timestamp = ((new Date().getTime() / 1000) % 86400 ) / (86400 / 440);
   $('#top-menu').css('background-position', '0 -' + timestamp + 'px');
 
+  if ($('body.controller-issues.action-new').length == 1) {
+    alter_new_issue_page();
+    return;
+  }
+
   if ($('body.controller-issues.action-show').length == 0) {
     return;
   }