$(function() {

  // original width of the sidebar and margin-left of the bodywrapper
  // with the sidebar expanded
  var bw_margin_expanded = $('.bodywrapper').css("margin-left");
  var ssb_width_expanded = $('.sphinxsidebar').css("width");

  // width of the sidebar and margin-left of the bodywrapper
  // with the sidebar collapsed
  var bw_margin_collapsed = ".8em";
  var ssb_width_collapsed = ".8em";  

  function toggle_sidebar() {
    //alert('toggling!');
    if ($('.sphinxsidebarwrapper').is(':visible')) {
      collapse_sidebar();
    }
    else {
      expand_sidebar();
    }
  }

  function collapse_sidebar() {
    //alert('collapsing!');
    $('.sphinxsidebarwrapper').hide();
    $('.sphinxsidebar').css("width", ssb_width_collapsed);
    $('.bodywrapper').css("margin-left", bw_margin_collapsed);
    $('#sidebarbutton').text("»");
	$('#sidebarbutton').attr('title', 'Expand sidebar');
  }

  function expand_sidebar() {
    //alert('expanding!');
    $('.bodywrapper').css("margin-left", bw_margin_expanded);
    $('.sphinxsidebar').css("width", ssb_width_expanded);
    $('.sphinxsidebarwrapper').css('display', 'table-cell');
    $('#sidebarbutton').text("«");
	$('#sidebarbutton').attr('title', 'Collapse sidebar');
  }

  function add_sidebar_button() {
    //alert('adding button!');
    $('.sphinxsidebar').append(
        '<span id="sidebarbutton">&laquo;</span>');
    $('#sidebarbutton').click(toggle_sidebar);
	$('#sidebarbutton').attr('title', 'Collapse sidebar');
	

    // change the css to center the button 
    // in the middle of the sidebar
    // XXX broken in a number of ways on ie6
    //     and probably on ie<6 and ie>6 too
    $('#sidebarbutton').css({
        "display": "table-cell",
        "vertical-align": "middle",
        "color": "white",
        "background-color": "inherit",
        "border-left": "1px solid #133f52",
        "font-size": "1.2em",
        "cursor": "pointer"});

    $('.sphinxsidebar').css({
        "display": "table",
        "height": "100%"});

    $('.sphinxsidebarwrapper').css('display', 'table-cell');
    $('html, body, .document').css('height', '100%');
  }

  add_sidebar_button();
});