by aasarava: added javascript block to prevent accidental double-click of...

by aasarava: added javascript block to prevent accidental double-click of confirmation button; fixed array error when no taxonomy terms are defined.

scanner.module

@@ -380,7 +380,7 @@ function scanner_form_submit($form_id, $form_values) {
   $_SESSION['scanner_wholeword'] = $form_values['wholeword'];
   $_SESSION['scanner_published'] = $form_values['published'];
   $_SESSION['scanner_regex']     = $form_values['regex'];
-  $_SESSION['scanner_terms']     = array_filter($form_values['terms']);
+  $_SESSION['scanner_terms']     = $form_values['terms'];
   $_SESSION['scanner_replace']   = $form_values['replace'];
 
   if ($form_values['op'] == 'Replace') {
@@ -399,6 +399,39 @@ function scanner_form_submit($form_id, $form_values) {
  * replacing things they don't intend to.
  */
 function scanner_confirm_form() {
+   //using set_html_head because it seems unecessary to load a separate css
+   // file for just one declaration:
+   //you can override the styles by declaring with something "higher up"
+   // the chain, like:  #wrapper #scanner-confirm-form .scanner-buttons .scanner-button-msg {...}
+   drupal_set_html_head('
+     <style type="text/css">
+       #scanner-confirm-form .scanner-buttons .scanner-button-msg {
+         position:absolute;
+         top:0; left:0; z-index:100;
+         width:100%; height:100%;
+         background-color:#000; opacity:0.75;
+         font-size:1.2em;
+       }
+       #scanner-confirm-form .scanner-buttons .scanner-button-msg p {
+         color:#fff;
+       }
+     </style>
+   ');
+
+   //javascript to prevent further clicks on confirmation button after it's clicked once.
+   //unfortunately we can't just use css disable to disable the button because then
+   // the op values aren't sent to drupal correctly.
+   drupal_add_js("
+    $(document).ready(function() {
+       $('input[@type=submit][@value=Yes, Continue]').click(function() {
+         $('.scanner-buttons').css('position','relative')
+           .append('<div class=\"scanner-button-msg\"><p>Replacing items... please wait...</p></div>')
+         $('.scanner-button-msg').click(function() { return false; });
+         return true;
+       });
+     });
+   ", 'inline');
+
   $form = array();
 
   $search    = $_SESSION['scanner_search'];
@@ -467,10 +500,12 @@ function scanner_confirm_form() {
   $form['confirm'] = array(
     '#type' => 'submit',
     '#value' => t('Yes, Continue'),
+    '#prefix' => '<div class="scanner-buttons">', //see suffix in cancel button element
   );
   $form['cancel'] = array(
     '#type' => 'submit',
     '#value' => t('No, Cancel'),
+    '#suffix' => '</div>', //see prefix in confirm button element
   );
 
   return $form;