Better support for sudden connection lost.

demos/01-demo.lisp

@@ -169,6 +169,7 @@
       (sleep .1))))
 
 (defun on-new-window (body)
+  (set-html-on-close body "Connection Lost")
   (let ((app (make-instance 'app-data)))
     (setf (connection-data-item body "app-data") app))
   (display-splash body)

demos/02-demo.lisp

@@ -15,6 +15,7 @@
 	   *global-list-box-hash*))
 
 (defun on-new-window (body)
+  (set-html-on-close body "Connection Lost")
   (load-css (html-document body) "/css/w3.css")
   (setf (title (html-document body)) "CLOG Chat")
 

demos/03-demo.lisp

@@ -173,6 +173,7 @@
 				    (declare (ignore obj))()))))
 
 (defun on-new-window (body)
+  (set-html-on-close body "Connection Lost")
   (let ((app (make-instance 'app-data)))
     (setf (connection-data-item body "app-data") app))
   (clog-gui-initialize body)

demos/04-demo.lisp

@@ -159,6 +159,7 @@
 		      (id-me app)))))
 
 (defun on-new-window (body)
+  (set-html-on-close body "Connection Lost")
   ;; Create an app-data object for every connection
   (let ((app (make-instance 'app-data)))
     (setf (connection-data-item body "app-data") app)

source/clog-body.lisp

@@ -47,7 +47,7 @@
 ;;;;;;;;;
 
 (defgeneric run (clog-body)
-  (:documentation "Keeps the main thread alive to prevent garbage
+  (:documentation "Keeps the connection thread alive to prevent garbage
 collection of local objects when not using connection-data objects
 or global objects."))
 
@@ -57,6 +57,15 @@ or global objects."))
 	    (sleep 10)
 	    (return))))
 
+;;;;;;;;;;;;;;;;;;;;;;;
+;; set-html-on-close ;;
+;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun set-html-on-close (clog-body html)
+  "In case of connection loss to this CLOG-BODY, replace the browser contents
+with HTML."
+  (clog-connection:set-html-on-close (connection-id clog-body) html))
+
 ;;;;;;;;;;;;
 ;; window ;;
 ;;;;;;;;;;;;

source/clog-connection.lisp

@@ -492,6 +492,7 @@ HTML <br />."
 the browser contents in case of connection loss."
   (execute connection-id (format nil "clog['html_on_close']='~A'"
 				 (escape-string html))))
+
 ;;;;;;;;;;;;;;;;;;;;;;
 ;; compiled-boot-js ;;
 ;;;;;;;;;;;;;;;;;;;;;;

source/clog.lisp

@@ -674,6 +674,7 @@ embedded in a native template application.)"
 
   "CLOG-Body - Properties"
   (run               generic-function)
+  (set-html-on-close generic-function)
   (window            generic-function)
   (html-document     generic-function)
   (location          generic-function)