Backing out all changes to the UI and notebook.js.

Updated kernel.js to trigger the ``received_unsolicited_message.Kernel`` event instead. Notebook extensions can handle the event in whatever way they deem appropriate.

A notebook extension that takes advantage of this is available at https://github.com/nheijermans/nbexts.git.

IPython/html/static/notebook/js/menubar.js

@@ -293,9 +293,6 b' define(['
         });
         
         // Kernel
-        this.element.find('#toggle_unsolicited').click(function() {
-            IPython.notebook.toggle_ignore_unsolicited_msgs();
-        });
         this.element.find('#int_kernel').click(function () {
             that.notebook.kernel.interrupt();
         });

IPython/html/static/notebook/js/notebook.js

@@ -137,7 +137,6 b' define(['
         this.undelete_below = false;
         this.paste_enabled = false;
         this.writable = false;
-        this.include_other_output = true;
         // It is important to start out in command mode to match the intial mode
         // of the KeyboardManager.
         this.mode = 'command';
@@ -1574,60 +1573,6 b' define(['
         this.get_selected_cell().toggle_line_numbers();
     };
     
-    // Support for displaying input and output messages from other iPy clients.
-
-    /**
-     * Toggles the ability to display input/output message events from
-     * externally connected clients (i.e. other iPython shells, vim-ipython,
-     * etc).
-     *
-     * @method toggle_ignore_unsolicited_msgs
-     */
-    Notebook.prototype.toggle_ignore_unsolicited_msgs = function () {
-        this.include_other_output = !this.include_other_output;
-        this.events.trigger('toggle_other_client_output.Notebook',
-                [this.include_other_output]);
-        return this.include_other_output;
-    };
-
-    /**
-     * Handles the display of unsolicited messages, i.e. inputs or outputs that
-     * were generated by a client other than this notebook. New messages are
-     * displayed at the bottom of the notebook.
-     *
-     * @method handle_unsolicited_msg
-     */
-    Notebook.prototype.handle_unsolicited_msg = function(msg) {
-        if (!this.include_other_output) {
-            return;
-        }
-        if (msg.msg_type == 'execute_input') {
-            var cell = this.insert_cell_at_bottom('code');
-            if (cell) {
-                var cell_index = this.ncells() - 1;
-                cell.last_msg_id = msg.parent_header.msg_id;
-                cell.set_text(msg.content.code);
-                cell._handle_execute_reply(msg);
-                this.scroll_to_cell(cell_index);
-                this.select(cell_index);
-            }
-        } else {
-            /* Find the input cell that corresponds with the output, then add
-             * the contents to the cell's output area.
-             */
-            var count = this.ncells();
-            while (count--) {
-                var cell = this.get_cell(count);
-                if (cell && cell.last_msg_id == msg.parent_header.msg_id) {
-                    cell.output_area.handle_output(msg);
-                    this.scroll_to_cell(count);
-                    this.select(count);
-                    break;
-                }
-            }
-        }
-    };
-
     /**
      * Set the codemirror mode for all code cells, including the default for
      * new code cells.
@@ -1705,7 +1650,6 b' define(['
                 cell.set_kernel(this.session.kernel);
             }
         }
-        this.kernel.unsolicited_msg_callback = $.proxy(this.handle_unsolicited_msg, this);
     };
     Notebook.prototype._session_start_failed = function (jqxhr, status, error){
         this._session_starting = false;

IPython/html/static/notebook/js/notificationarea.js

@@ -279,11 +279,6 b' define(['
             nnw.warning(error.message || "Notebook copy failed");
         });
         
-        this.events.on('toggle_other_client_output.Notebook', function(evt, include_output) {
-            var msg = (include_output? "Showing": "Ignoring") + " output from other clients";
-            nnw.set_message(msg, 2000);
-        });
-
         // Checkpoint events
         this.events.on('checkpoint_created.Notebook', function (evt, data) {
             var msg = "Checkpoint created";

IPython/html/static/services/kernels/kernel.js

@@ -47,7 +47,6 b' define(['
         this.session_id = utils.uuid();
         this._msg_callbacks = {};
         this.info_reply = {}; // kernel_info_reply stored here after starting
-        this.unsolicited_msg_callback = null;
 
         if (typeof(WebSocket) !== 'undefined') {
             this.WebSocket = WebSocket;
@@ -1000,11 +999,9 b' define(['
     Kernel.prototype._handle_output_message = function (msg) {
         var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id);
         if (!callbacks || !callbacks.iopub) {
-            if (this.unsolicited_msg_callback) {
-                // The message came from another client. Let the UI decide what
-                // to do with it.
-                this.unsolicited_msg_callback(msg);
-            }
+            // The message came from another client. Let the UI decide what to
+            // do with it.
+            this.events.trigger('received_unsolicited_message.Kernel', msg);
             return;
         }
         var callback = callbacks.iopub.output;
@@ -1020,10 +1017,10 b' define(['
      */
     Kernel.prototype._handle_input_message = function (msg) {
         var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id);
-        if (!callbacks && this.unsolicited_msg_callback) {
+        if (!callbacks) {
             // The message came from another client. Let the UI decide what to
             // do with it.
-            this.unsolicited_msg_callback(msg);
+            this.events.trigger('received_unsolicited_message.Kernel', msg);
         }
     };
 

IPython/html/templates/notebook.html

@@ -226,9 +226,6 b' class="notebook_app"'
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Kernel</a>
                     <ul id="kernel_menu" class="dropdown-menu">
-                        <li id="toggle_unsolicited"
-                            title="Toggles display of messages from clients other than this one sharing the same kernel.">
-                            <a href="#">Show/ignore output from other clients.</a></li>
                         <li id="int_kernel"
                             title="Send KeyboardInterrupt (CTRL-C) to the Kernel">
                             <a href="#">Interrupt</a>