Using beforeunload to save at exit and kill the kernel.

IPython/frontend/html/notebook/handlers.py

@@ -1,158 +1,158
 """Tornado handlers for the notebook."""
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import json
 import logging
 import urllib
 
 from tornado import web
 from tornado import websocket
 
 
 #-----------------------------------------------------------------------------
 # Top-level handlers
 #-----------------------------------------------------------------------------
 
 
 class NBBrowserHandler(web.RequestHandler):
     def get(self):
         nbm = self.application.notebook_manager
         project = nbm.notebook_dir
         self.render('nbbrowser.html', project=project)
 
 
 class NewHandler(web.RequestHandler):
     def get(self):
         notebook_id = self.application.notebook_manager.new_notebook()
         self.render('notebook.html', notebook_id=notebook_id)
 
 
 class NamedNotebookHandler(web.RequestHandler):
     def get(self, notebook_id):
         nbm = self.application.notebook_manager
         if not nbm.notebook_exists(notebook_id):
             raise web.HTTPError(404)
         self.render('notebook.html', notebook_id=notebook_id)
 
 
 #-----------------------------------------------------------------------------
 # Kernel handlers
 #-----------------------------------------------------------------------------
 
 
 class MainKernelHandler(web.RequestHandler):
 
     def get(self):
         rkm = self.application.routing_kernel_manager
         self.finish(json.dumps(rkm.kernel_ids))
 
     def post(self):
         rkm = self.application.routing_kernel_manager
         notebook_id = self.get_argument('notebook', default=None)
         kernel_id = rkm.start_kernel(notebook_id)
         self.set_header('Location', '/'+kernel_id)
         self.finish(json.dumps(kernel_id))
 
 
 class KernelHandler(web.RequestHandler):
 
     SUPPORTED_METHODS = ('DELETE')
 
     def delete(self, kernel_id):
         rkm = self.application.routing_kernel_manager
-        self.kill_kernel(kernel_id)
+        rkm.kill_kernel(kernel_id)
         self.set_status(204)
         self.finish()
 
 
 class KernelActionHandler(web.RequestHandler):
 
     def post(self, kernel_id, action):
         rkm = self.application.routing_kernel_manager
         if action == 'interrupt':
             rkm.interrupt_kernel(kernel_id)
             self.set_status(204)
         if action == 'restart':
             new_kernel_id = rkm.restart_kernel(kernel_id)
             self.write(json.dumps(new_kernel_id))
         self.finish()
 
 
 class ZMQStreamHandler(websocket.WebSocketHandler):
 
     def initialize(self, stream_name):
         self.stream_name = stream_name
 
     def open(self, kernel_id):
         rkm = self.application.routing_kernel_manager
         self.router = rkm.get_router(kernel_id, self.stream_name)
         self.client_id = self.router.register_client(self)
 
     def on_message(self, msg):
         self.router.forward_msg(self.client_id, msg)
 
     def on_close(self):
         self.router.unregister_client(self.client_id)
 
 
 #-----------------------------------------------------------------------------
 # Notebook web service handlers
 #-----------------------------------------------------------------------------
 
 class NotebookRootHandler(web.RequestHandler):
 
     def get(self):
         nbm = self.application.notebook_manager
         files = nbm.list_notebooks()
         self.finish(json.dumps(files))
 
     def post(self):
         nbm = self.application.notebook_manager
         body = self.request.body.strip()
         format = self.get_argument('format', default='json')
         name = self.get_argument('name', default=None)
         if body:
             notebook_id = nbm.save_new_notebook(body, name=name, format=format)
         else:
             notebook_id = nbm.new_notebook()
         self.set_header('Location', '/'+notebook_id)
         self.finish(json.dumps(notebook_id))
 
 
 class NotebookHandler(web.RequestHandler):
 
     SUPPORTED_METHODS = ('GET', 'PUT', 'DELETE')
 
     def get(self, notebook_id):
         nbm = self.application.notebook_manager
         format = self.get_argument('format', default='json')
         last_mod, name, data = nbm.get_notebook(notebook_id, format)
         if format == u'json':
             self.set_header('Content-Type', 'application/json')
             self.set_header('Content-Disposition','attachment; filename=%s.json' % name)
         elif format == u'xml':
             self.set_header('Content-Type', 'application/xml')
             self.set_header('Content-Disposition','attachment; filename=%s.ipynb' % name)
         elif format == u'py':
             self.set_header('Content-Type', 'application/x-python')
             self.set_header('Content-Disposition','attachment; filename=%s.py' % name)
         self.set_header('Last-Modified', last_mod)
         self.finish(data)
 
     def put(self, notebook_id):
         nbm = self.application.notebook_manager
         format = self.get_argument('format', default='json')
         name = self.get_argument('name', default=None)
         nbm.save_notebook(notebook_id, self.request.body, name=name, format=format)
         self.set_status(204)
         self.finish()
 
     def delete(self, notebook_id):
         nbm = self.application.notebook_manager
         nbm.delete_notebook(notebook_id)
         self.set_status(204)
         self.finish()
 

IPython/frontend/html/notebook/static/css/notebook.css

@@ -1,278 +1,288
 
 /**
  * Primary styles
  *
  * Author: IPython Development Team
  */
 
 
 body {
     background-color: white;
     /* This makes sure that the body covers the entire window and needs to
        be in a different element than the display: box in wrapper below */
     position: absolute;
     left: 0px;
     right: 0px;
     top: 0px;
     bottom: 0px;
     overflow: hidden;
 }
 
 span#save_widget {
     position: absolute;
     left: 0px;
     padding: 5px 0px;
     margin: 0px 0px 0px 0px;
 }
 
 input#notebook_name {
     height: 1em;
     line-height: 1em;
     padding: 5px;
 }
 
 span#kernel_status {
     position: absolute;
     padding: 8px 5px 5px 5px;
     right: 10px;
 	font-weight: bold;
 }
 
 .status_idle {
     color: gray;
 }
 
 .status_busy {
     color: red;
 }
 
 .status_restarting {
     color: black;
 }
 
 div#left_panel {
     overflow-y: auto;
     top: 0px;
     left: 0px;
     margin: 0px;
     padding: 0px;
     position: absolute;
 }
 
 h3.section_header {
     padding: 5px;
 }
 
 div.section_content {
     padding: 5px;
 }
 
 
 span.section_row_buttons > button {
     width: 60px;
 }
 
 .section_row {
     margin: 5px 0px;
 }
 
 .section_row_buttons {
     float: right;
 }
 
+#kernel_persist {
+    float: right;
+}
+
+.checkbox_label {
+    font-size: 85%;
+    float: right;
+    padding: 0.3em;
+}
+
 .section_row_header {
     float: left;
     font-size: 85%;
-    padding: 0.2em 0em;
+    padding: 0.4em 0em;
     font-weight: bold;
 }
 
 span.button_label {
     padding: 0.2em 1em;
     font-size: 77%;
     float: right;
 }
 
 /* This is needed because FF was adding a 2px margin top and bottom. */
 .section_row .ui-button {
     margin-top: 0px;
     margin-bottom: 0px;
 }
 
 #download_format {
     float: right;
     font-size: 85%;
     width: 60px;
     margin: 1px 5px;
 }
 
 div#left_panel_splitter {
     width: 8px;
     top: 0px;
     left: 202px;
     margin: 0px;
     padding: 0px;
     position: absolute;
 }
 
 div#notebook_panel {
 /*    The L margin will be set in the Javascript code*/
     margin: 0px 0px 0px 0px;
     padding: 0px;
 }
 
 div#notebook {
     overflow-y: scroll;
     overflow-x: auto;
     width: 100%;
     padding: 0px 15px 0px 15px;
     margin: 0px
     background-color: white;
 }
 
 div#pager_splitter {
     height: 8px;
 }
 
 div#pager {
     padding: 15px;
     overflow: auto;
 }
 
 div.cell {
     width: 100%;
     padding: 5px;
     /* This acts as a spacer between cells, that is outside the border */
     margin: 15px 0px 15px 0px;
 }
 
 div.code_cell {
     background-color: white;
 }
 
 div.prompt {
     width: 80px;
     padding: 0.4em;
     margin: 0px;
     font-family: monospace;
 }
 
 div.input_prompt {
     color: navy;
 }
 
 div.output {
     /* This is a spacer between the input and output of each cell */
     margin-top: 15px;
 }
 
 div.output_prompt {
     color: darkred;
 }
 
 div.output_area {
     text-align: left;
     color: black;
     font-family: monospace;
 }
 
 div.output_stream {
     padding: 0.4em;
 }
 
 div.output_latex {
     /* Slightly bigger than the rest of the notebook */
     font-size: 116%;
 }
 
 div.output_html {
 }
 
 div.output_png {
 }
 
 div.text_cell {
     background-color: white;
 }
 
 textarea.text_cell_input {
     /* Slightly bigger than the rest of the notebook */
     font-size: 116%;
     font-family: monospace;
     outline: none;
     resize: none;
     width:  inherit;
     border-style: none;
     padding: 0px;
     margin: 0px;
     color: black;
 }
 
 div.text_cell_render {
     font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
     /* Slightly bigger than the rest of the notebook */
     font-size: 116%;
     outline: none;
     resize: none;
     width:  inherit;
     border-style: none;
     padding: 5px;
     color: black;
 }
 
 div.text_cell_render em {font-style: italic;}
 div.text_cell_render strong {font-weight: bold;}
 div.text_cell_render u {text-decoration: underline;}
 div.text_cell_render :link { text-decoration: underline }
 div.text_cell_render :visited { text-decoration: underline }
 div.text_cell_render h1 {font-size: 197%; margin: .67em 0; font-weight: bold;}
 div.text_cell_render h2 {font-size: 153.9%; margin: .75em 0; font-weight: bold;}
 div.text_cell_render h3 {font-size: 116%; margin: .83em 0; font-weight: bold;}
 div.text_cell_render h4 {margin: 1.12em 0; font-weight: bold;}
 div.text_cell_render h5 {font-size: 85%.; margin: 1.5em 0; font-weight: bold;}
 div.text_cell_render h6 {font-size: 77%; margin: 1.67em 0; font-weight: bold;}
 div.text_cell_render ul {list-style:disc; margin-left: 40px;}
 div.text_cell_render ul ul {list-style:square; margin-left: 40px;}
 div.text_cell_render ul ul ul {list-style:circle; margin-left: 40px;}
 div.text_cell_render ol {list-style:upper-roman; margin-left: 40px;}
 div.text_cell_render ol ol {list-style:upper-alpha;}
 div.text_cell_render ol ol ol {list-style:decimal;}
 div.text_cell_render ol ol ol ol {list-style:lower-alpha;}
 div.text_cell_render ol ol ol ol ol {list-style:lower-roman;}
 
 
 .CodeMirror {
   overflow: hidden; /* Changed from auto to remove scrollbar */
   height: auto;     /* Changed to auto to autogrow */
   line-height: 1.231;  /* Changed from 1em to our global default */
 }
 
 /* CSS font colors for translated ANSI colors. */
 
 
 .ansiblack {color: black;}
 .ansired {color: darkred;}
 .ansigreen {color: darkgreen;}
 .ansiyellow {color: brown;}
 .ansiblue {color: darkblue;}
 .ansipurple {color: darkviolet;}
 .ansicyan {color: steelblue;}
 .ansigrey {color: grey;}
 .ansibold {font-weight: bold;}
 
 .completions {
     position: absolute;
     z-index: 10;
     overflow: auto;
     border: 1px solid black;
 }
 
 .completions select {
     background: white;
     outline: none;
     border: none;
     padding: 0px;
     margin: 0px;
     font-family: monospace;
 }
 

IPython/frontend/html/notebook/static/js/kernel.js

@@ -1,106 +1,114
 
 //============================================================================
 // Kernel
 //============================================================================
 
 var IPython = (function (IPython) {
 
     var utils = IPython.utils;
 
     var Kernel = function () {
         this.kernel_id = null;
         this.base_url = "/kernels";
         this.kernel_url = null;
     };
 
 
     Kernel.prototype.get_msg = function (msg_type, content) {
         var msg = {
             header : {
                 msg_id : utils.uuid(),
                 username : "username",
                 session: this.session_id,
                 msg_type : msg_type
             },
             content : content,
             parent_header : {}
         };
         return msg;
     }
 
     Kernel.prototype.start_kernel = function (notebook_id, callback) {
         var that = this;
         var qs = $.param({notebook:notebook_id});
         $.post(this.base_url + '?' + qs,
             function (kernel_id) {
                 that._handle_start_kernel(kernel_id, callback);
             }, 
             'json'
         );
     };
 
 
     Kernel.prototype._handle_start_kernel = function (kernel_id, callback) {
         this.kernel_id = kernel_id;
         this.kernel_url = this.base_url + "/" + this.kernel_id;
         this._start_channels();
         callback();
     };
 
 
     Kernel.prototype._start_channels = function () {
         var ws_url = "ws://127.0.0.1:8888" + this.kernel_url;
         this.shell_channel = new WebSocket(ws_url + "/shell");
         this.iopub_channel = new WebSocket(ws_url + "/iopub");
     }
 
 
     Kernel.prototype.execute = function (code) {
         var content = {
             code : code,
             silent : false,
             user_variables : [],
             user_expressions : {}
         };
         var msg = this.get_msg("execute_request", content);
         this.shell_channel.send(JSON.stringify(msg));
         return msg.header.msg_id;
     }
 
 
     Kernel.prototype.complete = function (line, cursor_pos) {
         var content = {
             text : '',
             line : line,
             cursor_pos : cursor_pos
         };
         var msg = this.get_msg("complete_request", content);
         this.shell_channel.send(JSON.stringify(msg));
         return msg.header.msg_id;
     }
 
 
     Kernel.prototype.interrupt = function () {
         $.post(this.kernel_url + "/interrupt");
     };
 
 
     Kernel.prototype.restart = function () {
         IPython.kernel_status_widget.status_restarting();
-        url = this.kernel_url + "/restart"
+        var url = this.kernel_url + "/restart"
         var that = this;
         $.post(url, function (kernel_id) {
             console.log("Kernel restarted: " + kernel_id);
             that.kernel_id = kernel_id;
             that.kernel_url = that.base_url + "/" + that.kernel_id;
             IPython.kernel_status_widget.status_idle();
         }, 'json');
     };
 
 
+    Kernel.prototype.kill = function () {
+        var settings = {
+            cache : false,
+            type : "DELETE",
+        };
+        $.ajax(this.kernel_url, settings);
+    };
+
     IPython.Kernel = Kernel;
 
     return IPython;
 
 }(IPython));
 

IPython/frontend/html/notebook/static/js/savewidget.js

@@ -1,101 +1,112
 
 //============================================================================
 // Cell
 //============================================================================
 
 var IPython = (function (IPython) {
 
     var utils = IPython.utils;
 
     var SaveWidget = function (selector) {
         this.selector = selector;
         this.notebook_name_re = /[^/\\]+/
         if (this.selector !== undefined) {
             this.element = $(selector);
             this.style();
             this.bind_events();
         }
     };
 
 
     SaveWidget.prototype.style = function () {
         this.element.find('input#notebook_name').addClass('ui-widget ui-widget-content');
         this.element.find('button#save_notebook').button();
         var left_panel_width = $('div#left_panel').outerWidth();
         var left_panel_splitter_width = $('div#left_panel_splitter').outerWidth();
         $('span#save_widget').css({marginLeft:left_panel_width+left_panel_splitter_width});
     };
 
 
     SaveWidget.prototype.bind_events = function () {
         var that = this;
         this.element.find('button#save_notebook').click(function () {
             IPython.notebook.save_notebook();
         });
+
+        $(window).bind('beforeunload', function () {
+            var kill_kernel = $('#kill_kernel').prop('checked');
+            IPython.notebook.save_notebook();
+            if (kill_kernel) {
+                IPython.notebook.kernel.kill();
+                return "You are about to exit this notebook and kill the kernel.";
+            } else {
+                return "You are about the exit this notebook and leave the kernel running.";
+            };
+        });
     };
 
 
     SaveWidget.prototype.get_notebook_name = function () {
         return this.element.find('input#notebook_name').attr('value');
     }
 
 
     SaveWidget.prototype.set_notebook_name = function (nbname) {
         this.element.find('input#notebook_name').attr('value',nbname);
     }
 
 
     SaveWidget.prototype.get_notebook_id = function () {
         return this.element.find('span#notebook_id').text()
     };
 
 
     SaveWidget.prototype.update_url = function () {
         var notebook_id = this.get_notebook_id();
         if (notebook_id !== '') {
             window.history.replaceState({}, '', notebook_id);
         };
     };
 
 
     SaveWidget.prototype.test_notebook_name = function () {
         var nbname = this.get_notebook_name();
         if (this.notebook_name_re.test(nbname)) {
             return true;
         } else {
             var bad_name = $('<div/>');
             bad_name.html(
                 "The notebook name you entered (" +
                 nbname +
                 ") is not valid. Notebook names can contain any characters except / and \\"
             );
             bad_name.dialog({title: 'Invalid name', modal: true});
             return false;
         };
     };
 
 
     SaveWidget.prototype.status_save = function () {
         this.element.find('span.ui-button-text').text('Save');
         this.element.find('button#save_notebook').button('enable');
     };    
 
 
     SaveWidget.prototype.status_saving = function () {
         this.element.find('span.ui-button-text').text('Saving');
         this.element.find('button#save_notebook').button('disable');
     };    
 
 
     SaveWidget.prototype.status_loading = function () {
         this.element.find('span.ui-button-text').text('Loading');
         this.element.find('button#save_notebook').button('disable');
     };    
 
 
     IPython.SaveWidget = SaveWidget;
 
     return IPython;
 
 }(IPython));
 

IPython/frontend/html/notebook/templates/notebook.html

@@ -1,188 +1,194
 <!DOCTYPE HTML>
 <html>
 
 <head>
     <meta charset="utf-8">
 
     <title>IPython Notebook</title>
 
     <link rel="stylesheet" href="static/jquery/css/themes/aristo/jquery-wijmo.css" type="text/css" />
 <!--     <link rel="stylesheet" href="static/jquery/css/themes/rocket/jquery-wijmo.css" type="text/css" /> -->
 <!--    <link rel="stylesheet" href="static/jquery/css/themes/smoothness/jquery-ui-1.8.14.custom.css" type="text/css" />-->
 
     <script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML" charset="utf-8"></script>
     <!-- <script type='text/javascript' src='static/mathjax/MathJax.js?config=TeX-AMS_HTML' charset='utf-8'></script> -->
     <script type="text/javascript">
     if (typeof MathJax == 'undefined') {
         console.log("Trying to load local copy of MathJax");
         document.write(unescape("%3Cscript type='text/javascript' src='static/mathjax/MathJax.js%3Fconfig=TeX-AMS_HTML' charset='utf-8'%3E%3C/script%3E"));
     }
     </script>
 
     <link rel="stylesheet" href="static/codemirror2/lib/codemirror.css">
     <link rel="stylesheet" href="static/codemirror2/mode/python/python.css">
 
     <link rel="stylesheet" href="static/css/boilerplate.css" type="text/css" />
     <link rel="stylesheet" href="static/css/layout.css" type="text/css" />
     <link rel="stylesheet" href="static/css/base.css" type="text/css" />
     <link rel="stylesheet" href="static/css/notebook.css" type="text/css" />
 
 </head>
 
 <body>
 
 <div id="header">
     <span id="ipython_notebook"><h1>IPython Notebook</h1></span>
     <span id="save_widget">
         <input type="text" id="notebook_name" size="20"></textarea>
         <span id="notebook_id" style="display:none">{{notebook_id}}</span>
         <button id="save_notebook">Save</button>
     </span>
     <span id="kernel_status">Idle</span>
 </div>
 
 <div id="main_app">
 
     <div id="left_panel">
 
         <div id="notebook_section">
             <h3 class="section_header">Notebook</h3>
             <div class="section_content">
                 <div class="section_row">
                     <span id="new_open" class="section_row_buttons">
                         <button id="new_notebook">New</button>
                         <button id="open_notebook">Open</button>
                     </span>
                     <span class="section_row_header">Actions</span>
                 </div>
                 <div class="section_row">
                     <span class="section_row_buttons">
                         <button id="download_notebook">Export</button>
                     </span>
                     <span>
                         <select id="download_format">
                             <option value="xml">xml</option>
                             <option value="json">json</option>
                             <option value="py">py</option>
                         </select>
                     </span>
                 </div>
             </div>
         </div>
 
         <div id="cell_section">
             <h3 class="section_header">Cell</h3>
             <div class="section_content">
                 <div class="section_row">
                     <span class="section_row_buttons">
                         <button id="delete_cell">Delete</button>
                     </span>
                     <span class="section_row_header">Actions</span>
                 </div>
                 <div class="section_row">
                     <span id="insert" class="section_row_buttons">
                         <button id="insert_cell_above">Above</button>
                         <button id="insert_cell_below">Below</button>
                     </span>
                     <span class="button_label">Insert</span>
                 </div>
                 <div class="section_row">
                     <span id="move" class="section_row_buttons">
                         <button id="move_cell_up">Up</button>
                         <button id="move_cell_down">Down</button>
                     </span>
                     <span class="button_label">Move</span>
                 </div>
                 <div class="section_row">
                     <span id="cell_type" class="section_row_buttons">
                         <button id="to_code">Code</button>
                         <button id="to_text">Text</button>
                     </span>
                     <span class="button_label">Cell Type</span>
                 </div>
                 <div class="section_row">
                     <span id="toggle_output" class="section_row_buttons">
                         <button id="collapse_cell">Collapse</button>
                         <button id="expand_cell">Expand</button>
                     </span>
                     <span class="button_label">Output</span>
                 </div>
                 <div class="section_row">
                     <span id="run_cells" class="section_row_buttons">
                         <button id="run_selected_cell">Selected</button>
                         <button id="run_all_cells">All</button>
                     </span>
                     <span class="button_label">Run</span>
                 </div>
             </div>
         </div>
 
         <div id="kernel_section">
             <h3 class="section_header">Kernel</h3>
             <div class="section_content">
                 <div class="section_row">
                     <span id="int_restart" class="section_row_buttons">
                         <button id="int_kernel">Interrupt</button>
                         <button id="restart_kernel">Restart</button>
                     </span>
                     <span class="section_row_header">Actions</span>
                 </div>
+                <div class="section_row">
+                    <span id="kernel_persist">
+                        <input type="checkbox" id="kill_kernel"></input>
+                    </span>
+                    <span class="checkbox_label">Kill kernel upon exit:</span>
+                </div>
             </div>
         </div>
 
         <div id="help_section">
             <h3 class="section_header">Help</h3>
             <div class="section_content">
                 <div class="section_row">
                     <span id="help_buttons0" class="section_row_buttons">
                         <button id="python_help"><a href="http://docs.python.org" target="_blank">Python</a></button>
                         <button id="ipython_help"><a href="http://ipython.org/documentation.html" target="_blank">IPython</a></button>
                         <button id="numpy_help"><a href="http://docs.scipy.org/doc/numpy/reference/" target="_blank">NumPy</a></button>
                     </span>
                     <span class="section_row_header">Links</span>
                 </div>
                 <div class="section_row">
                     <span id="help_buttons1" class="section_row_buttons">
                         <button id="matplotlib_help"><a href="http://matplotlib.sourceforge.net/" target="_blank">MPL</a></button>
                         <button id="scipy_help"><a href="http://docs.scipy.org/doc/scipy/reference/" target="_blank">SciPy</a></button>
                         <button id="sympy_help"><a href="http://docs.sympy.org/dev/index.html" target="_blank">SymPy</a></button>
                     </span>
                 </div>
             </div>
         </div>
 
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