_popover.less

.popover {
	position: absolute;
	top: 0;
	left: 0;
	z-index: @zindex-popover;
	display: block;
	max-width: @popover-max-width;
	// Our parent element can be arbitrary since tooltips are by default inserted as a sibling of their target element.
	// So reset our font and text properties to avoid inheriting weird values.
	#reset-text();
	#font-size(@popover-font-size);
	// Allow breaking very long words so they don't overflow the popover's bounds
	word-wrap: break-word;
	background-color: @popover-bg;
	background-clip: padding-box;
	border: @popover-border-width solid @popover-border-color;
	#border-radius(@popover-border-radius);
	#box-shadow(@popover-box-shadow);

	.arrow {
		position: absolute;
		display: block;
		width: @popover-arrow-width;
		height: @popover-arrow-height;
		margin: 0 @popover-border-radius;

		&::before,
		&::after {
			position: absolute;
			display: block;
			content: "";
			border-color: transparent;
			border-style: solid;
		}
	}
}

.bs-popover-top {
	margin-bottom: @popover-arrow-height;

	> .arrow {
		//bottom: calc((@popover-arrow-height + @popover-border-width) * -1);
		bottom: subtract(-@popover-arrow-height, @popover-border-width);

		&::before {
			bottom: 0;
			border-width: @popover-arrow-height (@popover-arrow-width / 2) 0;
			border-top-color: @popover-arrow-outer-color;
		}

		&::after {
			bottom: @popover-border-width;
			border-width: @popover-arrow-height (@popover-arrow-width / 2) 0;
			border-top-color: @popover-arrow-color;
		}
	}
}

.bs-popover-right {
	margin-left: @popover-arrow-height;

	> .arrow {
		//left: calc((@popover-arrow-height + @popover-border-width) * -1);
		left: subtract(-@popover-arrow-height, @popover-border-width);
		width: @popover-arrow-height;
		height: @popover-arrow-width;
		margin: @popover-border-radius 0; // make sure the arrow does not touch the popover's rounded corners

		&::before {
			left: 0;
			border-width: (@popover-arrow-width / 2) @popover-arrow-height (@popover-arrow-width / 2) 0;
			border-right-color: @popover-arrow-outer-color;
		}

		&::after {
			left: @popover-border-width;
			border-width: (@popover-arrow-width / 2) @popover-arrow-height (@popover-arrow-width / 2) 0;
			border-right-color: @popover-arrow-color;
		}
	}
}

.bs-popover-bottom {
	margin-top: @popover-arrow-height;

	> .arrow {
		//top: calc((@popover-arrow-height + @popover-border-width) * -1);
		top: subtract(-@popover-arrow-height, @popover-border-width);

		&::before {
			top: 0;
			border-width: 0 (@popover-arrow-width / 2) @popover-arrow-height (@popover-arrow-width / 2);
			border-bottom-color: @popover-arrow-outer-color;
		}

		&::after {
			top: @popover-border-width;
			border-width: 0 (@popover-arrow-width / 2) @popover-arrow-height (@popover-arrow-width / 2);
			border-bottom-color: @popover-arrow-color;
		}
	}

	// This will remove the popover-header's border just below the arrow
	.popover-header::before {
		position: absolute;
		top: 0;
		left: 50%;
		display: block;
		width: @popover-arrow-width;
		margin-left: (-@popover-arrow-width / 2);
		content: "";
		border-bottom: @popover-border-width solid @popover-header-bg;
	}
}

.bs-popover-left {
	margin-right: @popover-arrow-height;

	> .arrow {
		//right: calc((@popover-arrow-height + @popover-border-width) * -1);
		right: subtract(-@popover-arrow-height, @popover-border-width);
		width: @popover-arrow-height;
		height: @popover-arrow-width;
		margin: @popover-border-radius 0; // make sure the arrow does not touch the popover's rounded corners

		&::before {
			right: 0;
			border-width: (@popover-arrow-width / 2) 0 (@popover-arrow-width / 2) @popover-arrow-height;
			border-left-color: @popover-arrow-outer-color;
		}

		&::after {
			right: @popover-border-width;
			border-width: (@popover-arrow-width / 2) 0 (@popover-arrow-width / 2) @popover-arrow-height;
			border-left-color: @popover-arrow-color;
		}
	}
}

.bs-popover-auto {
	&[x-placement^="top"] {
		&:extend(.bs-popover-top all);
	}
	&[x-placement^="right"] {
		&:extend(.bs-popover-right all);
	}
	&[x-placement^="bottom"] {
		&:extend(.bs-popover-bottom all);
	}
	&[x-placement^="left"] {
		&:extend(.bs-popover-left all);
	}
}


// Offset the popover to account for the popover arrow
.popover-header {
	padding: @popover-header-padding-y @popover-header-padding-x;
	margin-bottom: 0; // Reset the default from Reboot
	#font-size(@font-size-base);
	// LESS PORT: Less doesn’t strip “empty” property values so we have to check for a value first.
	& when not (@popover-header-color = ~"") { color: @popover-header-color; }
	background-color: @popover-header-bg;
	border-bottom: @popover-border-width solid darken(@popover-header-bg, 5%);
	#border-top-radius(@popover-inner-border-radius);

	&:empty {
		display: none;
	}
}

.popover-body {
	padding: @popover-body-padding-y @popover-body-padding-x;
	color: @popover-body-color;
}