mediawiki-skins-Citizen/resources/skins.citizen.styles/common/progressbar.less
2022-11-26 03:40:43 -05:00

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/**
* Loading indicator
* Based on Vector
*
* By adding a class on the parent search form
* <div class=".citizen-loading"></div>
* A pseudo element is added via ':after' that adds the loading indicator.
*
* After appearing for more than a second, a progress-bar animation appears
* above the loading indicator.
*
**/
.citizen-loading:after {
// Delay animation by 500ms after loading
--delay-progress-bar: 500ms;
--height-progress-bar: 2px;
z-index: 999;
display: block;
overflow: hidden;
width: 100%;
// Hide text in case it extends beyond the input.
height: var( --height-progress-bar );
// Ensure it doesn't extend beyond the input.
box-sizing: border-box;
// Align style with the form
border-radius: 0 0 var( --border-radius--large ) var( --border-radius--large );
// Animates the progress-bar.
animation: progress-bar
1200ms
linear
var( --delay-progress-bar )
infinite
alternate;
// Add a progress-bar to the loading indicator
background: /*image*/ linear-gradient( 90deg, var( --color-primary ) 0%, var( --color-primary ) 100% )
-10% 0 ~'/' 0 var( --height-progress-bar )
no-repeat,transparent;
// Placeholder text
content: 'loading';
text-overflow: ellipsis;
white-space: nowrap;
// Fancy shadow under progress
filter: drop-shadow( 0px 0px 16px var( --color-primary ) );
}
@keyframes progress-bar {
0% {
background-position: -10% 0;
background-size: 0 var( --height-progress-bar );
}
30% {
background-position: -10% 0;
background-size: 30% var( --height-progress-bar );
}
70% {
background-position: 110% 0;
background-size: 30% var( --height-progress-bar );
}
100% {
background-position: 110% 0;
background-size: 0 var( --height-progress-bar );
}
}
// On page unload
html.citizen-loading:after {
position: fixed;
top: 0;
}
/* stylelint-disable media-feature-name-no-unknown */
@media ( display-mode: standalone ) {
// Standalone PWA has no loading affordance
// So we provide one
html.citizen-loading:after {
--delay-progress-bar: 0ms;
}
}