@import 'mediawiki.skin.variables.less';

.mw-spinner {
	position: relative;

	> .mw-spinner-container {
		transform-origin: 0 0;
	}

	@mw-spinner-small-size: 20px;
	@mw-spinner-large-size: 32px;

	&-small {
		width: @mw-spinner-small-size;
		height: @mw-spinner-small-size;

		> .mw-spinner-container {
			transform: scale( unit( ( @mw-spinner-small-size / 64 ) ) );
		}
	}

	&-large {
		width: @mw-spinner-large-size;
		height: @mw-spinner-large-size;

		> .mw-spinner-container {
			transform: scale( unit( ( @mw-spinner-large-size / 64 ) ) );
		}
	}

	&-block {
		display: block;
		width: 100%;
		text-align: center;

		> .mw-spinner-container {
			display: inline-block;
			vertical-align: top;
		}

		&.mw-spinner-small > .mw-spinner-container {
			min-width: @mw-spinner-small-size;
		}

		&.mw-spinner-large > .mw-spinner-container {
			min-width: @mw-spinner-large-size;
		}
	}

	&-inline {
		display: inline-block;
		vertical-align: middle;
	}

	/**
	* CSS loading spinner adapted from loadingio, CC0
	* https://github.com/loadingio/css-spinner/
	*/
	&-container > div {
		transform-origin: 32px 32px;
		animation: mw-spinner 1.2s linear infinite;

		&::after {
			content: ' ';
			display: block;
			position: absolute;
			top: 3px;
			// If this was allowed to flip, then transform-origin would also need to be flipped,
			// but that's not supported. Partial flipping causes visual issues (T292673).
			/* @noflip */
			left: 29px;
			width: 5px;
			height: 14px;
			border-radius: 20%;
			background: @color-base;
		}

		&:nth-child( 1 ) {
			transform: rotate( 0deg );
			animation-delay: -1.1s;
		}

		&:nth-child( 2 ) {
			transform: rotate( 30deg );
			animation-delay: -1s;
		}

		&:nth-child( 3 ) {
			transform: rotate( 60deg );
			animation-delay: -0.9s;
		}

		&:nth-child( 4 ) {
			transform: rotate( 90deg );
			animation-delay: -0.8s;
		}

		&:nth-child( 5 ) {
			transform: rotate( 120deg );
			animation-delay: -0.7s;
		}

		&:nth-child( 6 ) {
			transform: rotate( 150deg );
			animation-delay: -0.6s;
		}

		&:nth-child( 7 ) {
			transform: rotate( 180deg );
			animation-delay: -0.5s;
		}

		&:nth-child( 8 ) {
			transform: rotate( 210deg );
			animation-delay: -0.4s;
		}

		&:nth-child( 9 ) {
			transform: rotate( 240deg );
			animation-delay: -0.3s;
		}

		&:nth-child( 10 ) {
			transform: rotate( 270deg );
			animation-delay: -0.2s;
		}

		&:nth-child( 11 ) {
			transform: rotate( 300deg );
			animation-delay: -0.1s;
		}

		&:nth-child( 12 ) {
			transform: rotate( 330deg );
			animation-delay: 0s;
		}
	}
}

@keyframes mw-spinner {
	0% {
		opacity: 1;
	}

	100% {
		opacity: 0;
	}
}