mediawiki-skins-Vector/resources/skins.vector.styles/Sidebar.less
Nicholas Ray bfc95effdb Move sidebar into header to improve tab order
* Moves the sidebar into the header so that user can tab directly from
the sidebar button into the sidebar (when open).

* Because the sidebar is absolutely positioned inside the header and the
header applies a top-margin, we need to adjust the top position
calculation for the sidebar.

* Removes the checkbox from the accessibility tree through CSS `display:
none;` instead of HTML attributes.

* Given that the checkbox is not able to receive focus, the
`#mw-sidebar-checkbox:focus ~ .mw-header .mw-checkbox-hack-button` CSS
rule is obsolete and moved instead to the label button. An additional
outline: 0 rule was added to remove the dotted outline that Firefox
applies.

* Makes the "Skip to navigation" jump link point to the sidebar now.
After the sidebar has been tabbed through, the rest of the navigation
can be tabbed to.

Bug: T246420
Change-Id: I981da3650854568bb9cfbf3c6c59e7625e7d094c
2020-06-25 16:55:34 -06:00

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@import '../../variables.less';
@import 'mediawiki.mixins.less';
@import './layout.less';
@import 'legacy/Sidebar.less';
@import 'checkboxHack.less';
@margin-horizontal-sidebar-button-icon: 12px;
.mw-sidebar-action {
// Align with the portal heading/links
// `.portal` + `.portal .body`
margin: 8px @margin-end-portal 8px @margin-start-portal + @margin-start-portal-body;
}
.mw-sidebar-action-link {
font-size: @font-size-portal-list-item;
font-weight: bold;
}
#mw-sidebar-button {
// Override minimum dimensions set by mw-ui-icon.mw-ui-icon-element.
min-width: @size-sidebar-button;
min-height: @size-sidebar-button;
width: @size-sidebar-button;
height: @size-sidebar-button;
border: 1px solid transparent;
border-radius: @border-radius-base;
margin-left: -@margin-horizontal-sidebar-button-icon;
margin-right: @margin-horizontal-sidebar-button-icon; // Accidentally the same.
&:before {
// FIXME: the icon itself is supposed to be 20px. mediawiki.ui uses 24px.
// As soon as mediawiki.ui is standardized, remove this override. See T191021.
min-width: 20px;
min-height: 20px;
height: 100%;
// Center it horizontally.
margin: 0 @margin-horizontal-sidebar-button-icon;
// Equals `#555`, closest to `#54595d` on background-color `#fff`.
opacity: 0.67;
}
&:hover {
background-color: @background-color-frameless--hover;
&:before {
opacity: 1;
}
}
&:focus {
// Next three rules from OOUI, frameless, icon-only button widget.
outline: 0;
border-color: @color-primary;
.box-shadow( inset 0 0 0 1px @color-primary );
}
}
// Use the MediaWiki checkbox hack class from checkboxHack.less. This class exists on the
// checkbox input for the menu panel.
#mw-sidebar-checkbox:not( :checked ) ~ .mw-header .mw-sidebar {
// Turn off presentation so that screen readers get the same effect as visually hiding.
// Visibility and opacity can be animated. If animation is unnecessary, use `display: none`
// instead to avoid hidden rendering.
visibility: hidden;
opacity: 0;
.transform( translateX( -100% ) );
}
// Disable transitions on page load. No-JS users will unfortunately miss out. A similar pattern is
// used in Minerva's DropDownList. See enableCssAnimations() in skin.vector.js/index.js for context
// and additional details on how this class is added.
.vector-animations-ready {
// Enable sidebar transitions on desktop width only.
.mw-sidebar {
@media ( min-width: @width-breakpoint-desktop ) {
@timing: @transition-duration-base ease-out;
.transition( transform @timing, opacity @timing, visibility @timing; );
}
}
// Enable sidebar button transitions.
#mw-sidebar-button {
.transition(
background-color @transition-duration-base,
border-color @transition-duration-base,
box-shadow @transition-duration-base;
);
}
}