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[2.7] bpo-24712: Doc: Make sidebar sticky using browser support. #13179

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merged 1 commit into from
May 8, 2019
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[2.7] bpo-24712: Doc: Make sidebar sticky using browser support. #13179

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12 changes: 12 additions & 0 deletions Doc/tools/static/sidebar.js
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,15 @@ $(function() {
var dark_color = $('.related').css('background-color');
var light_color = $('.document').css('background-color');

// set position: sticky on sidebar
// (browsers that don't support this will fall-back to
// positioning via scroll_sidebar)
var supportsPositionSticky = (window.CSS && window.CSS.supports &&
window.CSS.supports('position', 'sticky'));
if (supportsPositionSticky) {
sidebarwrapper.css('position', 'sticky');
}

function get_viewport_height() {
if (window.innerHeight)
return window.innerHeight;
Expand Down Expand Up @@ -157,6 +166,9 @@ $(function() {

/* intelligent scrolling */
function scroll_sidebar() {
if (supportsPositionSticky) {
return;
}
var sidebar_height = sidebarwrapper.height();
var viewport_height = get_viewport_height();
var offset = sidebar.position()['top'];
Expand Down