element-web/res/css/views/rooms/_RoomBreadcrumbs.scss
Travis Ralston 9b64dd0cd7 Support horizontal scrolling on breadcrumbs
Fixes https://github.com/vector-im/riot-web/issues/8714
Fixes https://github.com/vector-im/riot-web/issues/8890
Fixes https://github.com/vector-im/riot-web/issues/9034
Fixes https://github.com/vector-im/riot-web/issues/8954

This turned out to be much more complicated than it needed to be. We use an IndicatorScrollbar to do all the math for us and some minor changes have been made so it can flag left/right overflow. The complicated part is the css changes which make the gradients work: unlike the RoomSubList, we have to calculate the offset of the indicators (gradients) on our own because position:sticky doesn't work horizontally.

The changes to the css (well, mostly pointer-events:none) make it so the gradient doesn't interfere with the room avatars. 

9034 and 8954 are fixed by this because they represent an overflow-x:none style breakage where browsers won't let you scroll without a scrollbar. The gradient offset problem is also demonstrated in 8954.
2019-03-27 17:52:05 -06:00

79 lines
2.2 KiB
SCSS

/*
Copyright 2019 New Vector Ltd
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
.mx_RoomBreadcrumbs {
position: relative;
height: 42px;
margin: 8px;
margin-bottom: 0;
overflow-x: visible;
display: flex;
flex-direction: row;
.mx_AutoHideScrollbar_offset {
display: flex;
flex-direction: row;
height: 100%;
}
.mx_RoomBreadcrumbs_crumb {
margin-left: 4px;
height: 32px;
display: inline-block;
transition: transform 0.3s, width 0.3s;
}
.mx_RoomBreadcrumbs_animate {
margin-left: 0;
width: 32px;
transform: scale(1);
}
.mx_RoomBreadcrumbs_preAnimate {
width: 0;
transform: scale(0);
}
// Note: we have to manually control the gradient and stuff, but the IndicatorScrollbar
// will deal with left/right positioning for us. Normally we'd use position:sticky on
// a few key elements, however that doesn't work in horizontal scrolling scenarios.
.mx_IndicatorScrollbar_leftOverflowIndicator,
.mx_IndicatorScrollbar_rightOverflowIndicator {
display: none;
}
&.mx_IndicatorScrollbar_leftOverflow .mx_IndicatorScrollbar_leftOverflowIndicator,
&.mx_IndicatorScrollbar_rightOverflow .mx_IndicatorScrollbar_rightOverflowIndicator {
position: absolute;
top: 0;
bottom: 0;
width: 15px;
display: block;
pointer-events: none;
z-index: 100;
}
.mx_IndicatorScrollbar_leftOverflowIndicator {
background: linear-gradient(to left, $panel-gradient);
}
.mx_IndicatorScrollbar_rightOverflowIndicator {
background: linear-gradient(to right, $panel-gradient);
}
}