mirror of https://github.com/vector-im/riot-web
90 lines
2.9 KiB
SCSS
90 lines
2.9 KiB
SCSS
/*
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Copyright 2018 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/* This file has CSS for both native and non-native scrollbars in an order
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* that's fairly logical to read but duplicates a selector to separate the
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* hiding/showing from the sizing.
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*/
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/* stylelint-disable no-duplicate-selectors */
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/*
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1. for browsers that support native overlay auto-hiding scrollbars
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*/
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.mx_AutoHideScrollbar {
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overflow-x: hidden;
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overflow-y: auto;
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-ms-overflow-style: -ms-autohiding-scrollbar;
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}
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/*
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2. webkit also supports overflow:overlay where the scrollbars don't take any space
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in the layout but they don't autohide, so do that only on hover
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*/
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body.mx_scrollbar_overlay_noautohide .mx_AutoHideScrollbar {
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overflow-y: hidden;
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}
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body.mx_scrollbar_overlay_noautohide .mx_AutoHideScrollbar:hover {
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overflow-y: overlay;
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}
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/*
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3. as a last fallback, compensate for the scrollbar taking up space in the layout
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by having giving the child element (.mx_AutoHideScrollbar_offset) a
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negative right margin of the width of the scrollbar when the container
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is overflowing. This is what Firefox ends up using. Overflow is detected
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in javascript, and adds the mx_AutoHideScrollbar_overflow class to the container.
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This only works in Firefox, which should be fine as this fallback is only needed there.
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*/
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body.mx_scrollbar_nooverlay {
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.mx_AutoHideScrollbar {
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overflow-y: hidden;
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}
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.mx_AutoHideScrollbar:hover {
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overflow-y: auto;
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}
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/*
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offset scrollbar width with negative margin-right
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include before and after psuedo-elements here so they can
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be used to do something interesting like scroll-indicating
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gradients (see IndicatorScrollBar)
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*/
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.mx_AutoHideScrollbar:hover.mx_AutoHideScrollbar_overflow > .mx_AutoHideScrollbar_offset,
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.mx_AutoHideScrollbar:hover.mx_AutoHideScrollbar_overflow::before,
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.mx_AutoHideScrollbar:hover.mx_AutoHideScrollbar_overflow::after {
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margin-right: calc(-1 * var(--scrollbar-width));
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}
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}
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// style the native scrollbars ...
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// ... standard css scrollbars (firefox at time of writing)
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.mx_AutoHideScrollbar {
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scrollbar-color: $scrollbar-thumb-color $scrollbar-track-color;
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scrollbar-width: thin;
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}
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// or fallback for webkit browsers
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::-webkit-scrollbar {
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width: 6px;
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height: 6px;
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background-color: $scrollbar-track-color;
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}
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::-webkit-scrollbar-thumb {
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background-color: $scrollbar-thumb-color;
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border-radius: 3px;
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}
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