Fix javascript errors in IE on page with iframe that points to another domain

CHANGELOG

@@ -28,6 +28,7 @@ CHANGELOG Roundcube Webmail
 - Fix handling of 'mailto' and 'error' arguments in message_before_send hook (#5347)
 - Fix missing localization of HTML editor when assets_dir != INSTALL_PATH
 - Fix handling of blockquote tags with mixed case on html2text conversion (#5363)
+- Fix javascript errors in IE on page with iframe that points to another domain
 
 RELEASE 1.2.0
 -------------

program/js/app.js

@@ -612,16 +612,12 @@ function rcube_webmail()
     }
 
     // catch document (and iframe) mouse clicks
-    var body_mouseup = function(e){ return ref.doc_mouse_up(e); };
+    var body_mouseup = function(e) { return ref.doc_mouse_up(e); };
     $(document.body)
       .mouseup(body_mouseup)
-      .keydown(function(e){ return ref.doc_keypress(e); });
+      .keydown(function(e) { return ref.doc_keypress(e); });
 
-    $('iframe').on('load', function(e) {
-        try { $(this.contentDocument || this.contentWindow).on('mouseup', body_mouseup);  }
-        catch (e) {/* catch possible "Permission denied" error in IE */ }
-      })
-      .contents().on('mouseup', body_mouseup);
+    rcube_webmail.set_iframe_events({mouseup: body_mouseup});
 
     // trigger init event hook
     this.triggerEvent('init', { task:this.task, action:this.env.action });
@@ -8981,6 +8977,23 @@ rcube_webmail.subject_text = function(elem)
   return t.text();
 };
 
+// set event handlers on all iframe elements (and their contents)
+rcube_webmail.set_iframe_events = function(events)
+{
+  $('iframe').each(function() {
+    var frame = $(this);
+    $.each(events, function(event_name, event_handler) {
+      frame.on('load', function(e) {
+        try { $(this).contents().on(event_name, event_handler); }
+        catch (e) {/* catch possible permission error in IE */ }
+      });
+
+      try { frame.contents().on(event_name, event_handler); }
+      catch (e) {/* catch possible permission error in IE */ }
+    });
+  });
+};
+
 rcube_webmail.prototype.get_cookie = getCookie;
 
 // copy event engine prototype

skins/classic/functions.js

@@ -827,20 +827,6 @@ function rcmail_scroller(list, top, bottom)
   };
 };
 
-
-// Events handling in iframes (eg. preview pane)
-function iframe_events()
-{
-  // this==iframe
-  try {
-    var doc = this.contentDocument ? this.contentDocument : this.contentWindow ? this.contentWindow.document : null;
-    $(doc).mouseup(function(e) { rcmail_ui.body_mouseup(e); });
-  }
-  catch (e) {
-    // catch possible "Permission denied" error in IE
-  };
-};
-
 // Abbreviate mailbox names to fit width of the container
 function rcube_render_mailboxlist()
 {
@@ -1015,8 +1001,7 @@ function rcube_init_mail_ui()
       update_quota(rcmail.env.quota_content);
     rcmail.addEventListener('setquota', update_quota);
 
-    $('iframe').on('load', iframe_events)
-      .contents().mouseup(function(e) { rcmail_ui.body_mouseup(e); });
+    rcube_webmail.set_iframe_events({mouseup: function(e) { return rcmail_ui.body_mouseup(e); }});
 
     if (rcmail.env.task == 'mail') {
       rcmail.addEventListener('enable-command', 'enable_command', rcmail_ui)