informative hover text for current selection

IPython/html/static/tree/js/newnotebook.js

@@ -1,133 +1,135 b''
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 
 define([
     'jquery',
     'base/js/namespace',
     'base/js/utils',
     'base/js/dialog',
 ], function ($, IPython, utils, dialog) {
     "use strict";
     
     var NewNotebookWidget = function (selector, options) {
         this.selector = selector;
         this.base_url = options.base_url;
         this.notebook_path = options.notebook_path;
         this.contents = options.contents;
         this.current_selection = null;
         this.config = options.config;
         this.kernelspecs = {};
         if (this.selector !== undefined) {
             this.element = $(selector);
             this.request_kernelspecs();
         }
         this.bind_events();
     };
     
     NewNotebookWidget.prototype.bind_events = function () {
         var that = this;
         this.element.find('#new_notebook').click(function () {
             that.new_notebook();
         });
     };
     
     NewNotebookWidget.prototype.request_kernelspecs = function () {
         /** request and then load kernel specs */
         var url = utils.url_join_encode(this.base_url, 'api/kernelspecs');
         utils.promising_ajax(url).then($.proxy(this._load_kernelspecs, this));
     };
     
     NewNotebookWidget.prototype._load_kernelspecs = function (data) {
         /** load kernelspec list */
         var that = this;
         this.kernelspecs = data.kernelspecs;
         var menu = this.element.find("#new-notebook-menu");
         var keys = Object.keys(data.kernelspecs).sort(function (a, b) {
             var da = data.kernelspecs[a].display_name;
             var db = data.kernelspecs[b].display_name;
             if (da === db) {
                 return 0;
             } else if (da > db) {
                 return 1;
             } else {
                 return -1;
             }
         });
         for (var i = 0; i < keys.length; i++) {
             var ks = this.kernelspecs[keys[i]];
             var li = $("<li>")
                 .attr("id", "kernel-" +ks.name)
                 .data('kernelspec', ks).append(
                     $('<a>')
                         .attr('href', '#')
                         .click($.proxy(this.new_notebook, this, ks.name))
                         .text(ks.display_name)
                         .attr('title', 'Create a new notebook with ' + ks.display_name)
                 );
             menu.append(li);
         }
         this.config.loaded.then(function () {
             that._load_default_kernelspec(data['default']);
         });
     };
     
     NewNotebookWidget.prototype._load_default_kernelspec = function (default_name) {
         /** load default kernelspec name from config, if defined */
         if (this.config.data.NewNotebookWidget &&
             this.config.data.NewNotebookWidget.current_selection &&
             this.kernelspecs[this.config.data.NewNotebookWidget.current_selection] !== undefined
         ) {
             default_name = this.config.data.NewNotebookWidget.current_selection;
         }
         this.set_default_kernel(default_name);
     };
 
     NewNotebookWidget.prototype.set_default_kernel = function (kernel_name) {
         /** select the current default kernel */
         this.current_selection = kernel_name;
         this.config.update({
             NewNotebookWidget: {
                 current_selection: kernel_name
             }
         });
         var spec = this.kernelspecs[kernel_name];
         var display_name;
         if (spec) {
             display_name = spec.display_name;
-            this.element.find("#current-kernel").text(display_name);
+            this.element.find("#current-kernel")
+                .text(display_name)
+                .attr('title', display_name + " is the default kernel for new notebooks");
         } else {
             display_name = 'default kernel';
         }
         this.element.find("#new_notebook").attr('title',
             'Create a new notebook with ' + display_name
         );
     };
     
     NewNotebookWidget.prototype.new_notebook = function (kernel_name) {
         /** create and open a new notebook */
         var that = this;
         kernel_name = kernel_name || this.current_selection;
         var w = window.open();
         this.contents.new_untitled(that.notebook_path, {type: "notebook"}).then(
             function (data) {
                 var url = utils.url_join_encode(
                     that.base_url, 'notebooks', data.path
                 );
                 if (kernel_name) {
                     url += "?kernel_name=" + kernel_name;
                 }
                 w.location = url;
             },
             function (error) {
                 w.close();
                 dialog.modal({
                     title : 'Creating Notebook Failed',
                     body : "The error was: " + error.message,
                     buttons : {'OK' : {'class' : 'btn-primary'}}
                 });
             }
         );
     };
     
     return {'NewNotebookWidget': NewNotebookWidget};
 });