mediawiki-skins-Vector/resources/skins.vector.zebra.styles/components/TableOfContents.less
Jan Drewniak 036e1295ec [Zebra] Unify ToC & menu scroll behaviour
- Refactor the TOC toggle button position
- Move the TOC/pinnable scrollable element from
  `.vector-pinnable-element` to `.vector-pinned-container`
  and `.vector-dropdown-content`.
- Applies The Fade™️, as well as a vh max-height, to both
  pinned menus and dropdowns.

Changes the way The Fade™️ is positioned by using
position:sticky so that it can be applied to
dropdowns, sidebar menus as well as all ToC permutations.

Bug: T335155
Change-Id: I655a4438d43d878a09e66b3487b8c27cece3a5d2
2023-05-04 16:19:00 -04:00

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/**
* Checkbox hack used by collapsed TOC on narrow viewports for no JS users.
* Although it's display:none, the :checked state is still affected when clicking
* the associated label.
*/
#vector-toc-collapsed-checkbox {
display: none;
}
.vector-toc {
.vector-toc-numb {
display: none;
}
.vector-toc-toggle {
// For no-js users, toggling is disabled and icon is hidden
display: none;
width: @size-toc-subsection-toggle;
height: @size-toc-subsection-toggle;
// Changes the size of the icon background image
font-size: @size-toc-subsection-toggle-icon;
transition: @transition-duration-base;
position: absolute;
left: -@size-toc-subsection-toggle/2;
// Visual centering.
top: 2px;
cursor: pointer;
}
.vector-toc-link {
display: block;
word-break: break-word;
color: @color-link;
}
// Highlight and bold active sections, active top sections that are unexpanded
// and active top sections that are the only active element.
.vector-toc-list-item-active,
.vector-toc-level-1-active:not( .vector-toc-list-item-expanded ),
.vector-toc-list-item-active.vector-toc-level-1-active {
> .vector-toc-link {
// Highlight active section
color: @color-base;
font-weight: bold;
.vector-toc-text {
// Increase width to prevent line wrapping due to bold text
// Avoid applying on link element to avoid focus indicator changing size
width: ~'calc( 100% + @{padding-horizontal-dropdown-menu} )';
}
}
}
// Highlight active top sections that contain an active section
.vector-toc-level-1-active:not( .vector-toc-list-item-active ) > .vector-toc-link {
color: @color-base;
}
.vector-toc-text {
// Match .mixin-vector-dropdown-menu-item() vertical padding
padding: @padding-vertical-dropdown-menu-item 0;
}
.vector-toc-contents,
.vector-toc-list {
margin: 0;
list-style: none;
}
.vector-toc-list-item {
position: relative;
list-style-type: none;
padding-left: @toc-list-item-padding-left;
margin: 0;
}
}
// Collapse ToC sections by default, excluding no-js
&.client-js .vector-toc {
.vector-toc-level-1 .vector-toc-list-item {
display: none;
}
.vector-toc-level-1.vector-toc-list-item-expanded .vector-toc-list-item {
display: block;
}
.vector-toc-toggle {
display: block;
}
.vector-toc-level-1.vector-toc-list-item-expanded .vector-toc-toggle {
transform: rotate( 0deg );
}
}
&.client-js body.ltr .vector-toc .vector-toc-toggle {
transform: rotate( -90deg );
}
&.client-js body.rtl .vector-toc .vector-toc-toggle {
transform: rotate( 90deg );
}
// Ensure there is only 1 table of contents landmark at anytime
.vector-toc-landmark {
display: none;
}
&.vector-feature-toc-pinned-disabled body:not( .vector-sticky-header-visible ) .vector-page-titlebar,
&.vector-feature-toc-pinned-disabled .vector-sticky-header-visible .vector-sticky-header,
&.vector-feature-toc-pinned-enabled .mw-page-container-inner {
.vector-toc-landmark {
display: block;
}
}
// On smaller viewports the TOC will always be moved to the page titlebar via JS
// regardless of the TOC pinned classes
@media ( max-width: @max-width-tablet ) {
&.client-js .vector-page-titlebar .vector-toc-landmark {
display: block;
}
&.client-js .mw-table-of-contents-container.vector-toc-landmark {
display: none;
}
}