Add scrollmanager

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

@@ -0,0 +1,78 b''
+// Copyright (c) IPython Development Team.
+// Distributed under the terms of the Modified BSD License.
+define([], function(){
+    "use strict";
+
+    var ScrollManager = function (notebook) {
+        // Public constructor.
+        this.notebook = notebook;
+    };
+
+    ScrollManager.prototype.scroll = function (delta) {
+        // Scroll the document.
+        //
+        // Parameters
+        // ----------
+        // delta: integer
+        //  direction to scroll the document.  Positive is downwards.
+
+        // If one or more slides exist, scroll to the slide.
+        var $slide_cells = $('.slideshow-slide');
+        if ($slide_cells.length > 0) {
+            var i, cell;
+
+            // Get the active slide cell index.
+            var selected_index = this.notebook.find_cell_index(this.notebook.get_selected_cell());
+            var active_slide = -1;
+            var cells = this.notebook.get_cells();
+            for (i = selected_index; i >= 0; i--) {
+                cell = cells[i];
+                var ns = cell.metadata.slideshow;
+                if (ns && ns.slide_type == 'slide') {
+                    active_slide = i;
+                    break;
+                }
+            }
+            
+            // Translate cell index into slide cell index.
+            if (active_slide != -1) {
+                for (i = 0; i < $slide_cells.length; i++) {
+                    if (cells[active_slide].element[0] == $slide_cells[i]) {
+                        active_slide = i;
+                        break;
+                    }
+                } 
+            }
+        
+            // Scroll.
+            if (active_slide != -1 || delta > 0) {
+                active_slide += delta;
+                active_slide = Math.max(0, Math.min($slide_cells.length-1, active_slide));
+                
+                var cell_element = $slide_cells[active_slide];
+                cell = $(cell_element).data('cell');
+                this.notebook.select(this.notebook.find_cell_index(cell));
+                
+                this.scroll_to(cell_element);
+                //cell_element.scrollIntoView(true);
+            }
+
+            // Cancel browser keyboard scroll.
+            return false;
+        
+        // No slides exist, default browser scroll
+        } else {
+            return true;
+        }
+    };
+
+    ScrollManager.prototype.scroll_to = function(destination) {
+        $('html, body').animate({'scrollTop': element.offset().top}, 'slow', 'swing');
+    };
+
+    // For convinience, add the ScrollManager class to the global namespace
+    IPython.ScrollManager = ScrollManager;
+    // Return naemspace for require.js loads
+    return ScrollManager;
+
+});

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

@@ -1,12 +1,15 b''
-// Copyright (c) IPython Development Team.
-// Distributed under the terms of the Modified BSD License.
+//----------------------------------------------------------------------------
+//  Copyright (C) 2011  The IPython Development Team
+//
+//  Distributed under the terms of the BSD License.  The full license is in
+//  the file COPYING, distributed as part of this software.
+//----------------------------------------------------------------------------
+
+//============================================================================
+// Keyboard management
+//============================================================================
 
-define([
-    'base/js/namespace',
-    'jquery',
-    'base/js/utils',
-    'base/js/keyboard',
-], function(IPython, $, utils, keyboard) {
+var IPython = (function (IPython) {
     "use strict";
     
     var browser = utils.browser[0];
@@ -183,6 +186,18 b' define(['
     KeyboardManager.prototype.get_default_command_shortcuts = function() {
         var that = this;
         return {
+        'space': {
+            help: "Scroll down to next H1 cell",
+            handler: function(event) {
+                return that.notebook.scrollmanager.scroll(1);
+            },
+        },
+        'shift-space': {
+            help: "Scroll up to previous H1 cell",
+            handler: function(event) {
+                return that.notebook.scrollmanager.scroll(-1);
+            },
+        },
             'enter' : {
                 help    : 'edit mode',
                 help_index : 'aa',

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

@@ -19,6 +19,7 b' require(['
     'notebook/js/keyboardmanager',
     'notebook/js/config',
     'notebook/js/kernelselector',
+    'notebook/js/scrollmanager'
     // only loaded, not used:
     'custom/custom',
 ], function(
@@ -38,7 +39,8 b' require(['
     savewidget, 
     keyboardmanager,
     config,
-    kernelselector
+    kernelselector,
+    scrollmanager
     ) {
     "use strict";
 
@@ -67,6 +69,7 b' require(['
         save_widget: save_widget,
         config: user_config},
         common_options));
+    var scrollmanager = new scrollmanager.ScrollManager(notebook);
     var login_widget = new loginwidget.LoginWidget('span#login_widget', common_options);
     var toolbar = new maintoolbar.MainToolBar('#maintoolbar-container', {
         notebook: notebook, 
@@ -132,6 +135,7 b' require(['
     IPython.save_widget = save_widget;
     IPython.config = user_config;
     IPython.tooltip = notebook.tooltip;
+    IPython.scrollmanager = scrollmanager;
 
     events.trigger('app_initialized.NotebookApp');
     notebook.load_notebook(common_options.notebook_name, common_options.notebook_path);