##// END OF EJS Templates
Add scrollmanager
Add scrollmanager

File last commit:

r17864:0fddacf5
r17864:0fddacf5
Show More
scrollmanager.js
78 lines | 2.6 KiB | application/javascript | JavascriptLexer
Jonathan Frederic
Add scrollmanager
r17864 // 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;
});