// Embedded icons from Open Iconic.
// Released under MIT and copyright 2014 Waybury.
// https://useiconic.com/open


// Checkboxes and radios
//
// Base class takes care of all the key behavioral aspects.

.custom-control {
	position: relative;
	display: block;
	min-height: (1rem * @line-height-base);
	padding-left: @custom-control-gutter;
}

.custom-control-inline {
	display: inline-flex;
	margin-right: @custom-control-spacer-x;
}

.custom-control-input {
	position: absolute;
	z-index: -1; // Put the input behind the label so it doesn't overlay text
	opacity: 0;

	&:checked ~ .custom-control-label::before {
		color: @custom-control-indicator-checked-color;
		#gradient-bg(@custom-control-indicator-checked-bg);
		#box-shadow(@custom-control-indicator-checked-box-shadow);
	}

	&:focus ~ .custom-control-label::before {
		// the mixin is not used here to make sure there is feedback
		box-shadow: @custom-control-indicator-focus-box-shadow;
	}

	&:active ~ .custom-control-label::before {
		color: @custom-control-indicator-active-color;
		background-color: @custom-control-indicator-active-bg;
		#box-shadow(@custom-control-indicator-active-box-shadow);
	}

	&:disabled {
		~ .custom-control-label {
			color: @custom-control-label-disabled-color;

			&::before {
				background-color: @custom-control-indicator-disabled-bg;
			}
		}
	}
}

// Custom control indicators
//
// Build the custom controls out of pseudo-elements.

.custom-control-label {
	position: relative;
	margin-bottom: 0;

	// Background-color and (when enabled) gradient
	&::before {
		position: absolute;
		top: ((@line-height-base - @custom-control-indicator-size) / 2);
		left: -@custom-control-gutter;
		display: block;
		width: @custom-control-indicator-size;
		height: @custom-control-indicator-size;
		pointer-events: none;
		content: "";
		-webkit-user-select: none;
		-moz-user-select: none;
		-ms-user-select: none;
		user-select: none;
		background-color: @custom-control-indicator-bg;
		#box-shadow(@custom-control-indicator-box-shadow);
	}

	// Foreground (icon)
	&::after {
		position: absolute;
		top: ((@line-height-base - @custom-control-indicator-size) / 2);
		left: -@custom-control-gutter;
		display: block;
		width: @custom-control-indicator-size;
		height: @custom-control-indicator-size;
		content: "";
		background-repeat: no-repeat;
		background-position: center center;
		background-size: @custom-control-indicator-bg-size;
	}
}


// Checkboxes
//
// Tweak just a few things for checkboxes.

.custom-checkbox {
	.custom-control-label::before {
		#border-radius(@custom-checkbox-indicator-border-radius);
	}

	.custom-control-input:checked ~ .custom-control-label {
		&::before {
			#gradient-bg(@custom-control-indicator-checked-bg);
		}
		&::after {
			background-image: @custom-checkbox-indicator-icon-checked;
		}
	}

	.custom-control-input:indeterminate ~ .custom-control-label {
		&::before {
			#gradient-bg(@custom-checkbox-indicator-indeterminate-bg);
			#box-shadow(@custom-checkbox-indicator-indeterminate-box-shadow);
		}
		&::after {
			background-image: @custom-checkbox-indicator-icon-indeterminate;
		}
	}

	.custom-control-input:disabled {
		&:checked ~ .custom-control-label::before {
			background-color: @custom-control-indicator-checked-disabled-bg;
		}
		&:indeterminate ~ .custom-control-label::before {
			background-color: @custom-control-indicator-checked-disabled-bg;
		}
	}
}

// Radios
//
// Tweak just a few things for radios.

.custom-radio {
	.custom-control-label::before {
		border-radius: @custom-radio-indicator-border-radius;
	}

	.custom-control-input:checked ~ .custom-control-label {
		&::before {
			#gradient-bg(@custom-control-indicator-checked-bg);
		}
		&::after {
			background-image: @custom-radio-indicator-icon-checked;
		}
	}

	.custom-control-input:disabled {
		&:checked ~ .custom-control-label::before {
			background-color: @custom-control-indicator-checked-disabled-bg;
		}
	}
}


// Select
//
// Replaces the browser default select with a custom one, mostly pulled from
// https://primer.github.io/.
//

.custom-select {
	display: inline-block;
	width: 100%;
	height: @custom-select-height;
	padding: @custom-select-padding-y (@custom-select-padding-x + @custom-select-indicator-padding) @custom-select-padding-y @custom-select-padding-x;
	line-height: @custom-select-line-height;
	color: @custom-select-color;
	vertical-align: middle;
	background: @custom-select-bg @custom-select-indicator no-repeat right @custom-select-padding-x center;
	background-size: @custom-select-bg-size;
	border: @custom-select-border-width solid @custom-select-border-color;
	& when (@enable-rounded) {
		border-radius: @custom-select-border-radius;
	}
	& when not (@enable-rounded) {
		border-radius: 0;
	}
	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;

	&:focus {
		border-color: @custom-select-focus-border-color;
		outline: 0;
		box-shadow: @custom-select-focus-box-shadow;

		&::-ms-value {
			// For visual consistency with other platforms/browsers,
			// suppress the default white text on blue background highlight given to
			// the selected option text when the (still closed) <select> receives focus
			// in IE and (under certain conditions) Edge.
			// See https://github.com/twbs/bootstrap/issues/19398.
			color: @input-color;
			background-color: @input-bg;
		}
	}

	&[multiple],
	&[size]:not([size="1"]) {
		height: auto;
		padding-right: @custom-select-padding-x;
		background-image: none;
	}

	&:disabled {
		color: @custom-select-disabled-color;
		background-color: @custom-select-disabled-bg;
	}

	// Hides the default caret in IE11
	&::-ms-expand {
		opacity: 0;
	}
}

.custom-select-sm {
	height: @custom-select-height-sm;
	padding-top: @custom-select-padding-y;
	padding-bottom: @custom-select-padding-y;
	font-size: @custom-select-font-size-sm;
}

.custom-select-lg {
	height: @custom-select-height-lg;
	padding-top: @custom-select-padding-y;
	padding-bottom: @custom-select-padding-y;
	font-size: @custom-select-font-size-lg;
}


// File
//
// Custom file input.

.custom-file {
	position: relative;
	display: inline-block;
	width: 100%;
	height: @custom-file-height;
	margin-bottom: 0;
}

.custom-file-input {
	position: relative;
	z-index: 2;
	width: 100%;
	height: @custom-file-height;
	margin: 0;
	opacity: 0;

	&:focus ~ .custom-file-label {
		border-color: @custom-file-focus-border-color;
		box-shadow: @custom-file-focus-box-shadow;

		&::after {
			border-color: @custom-file-focus-border-color;
		}
	}

	//@each $lang, $value in $custom-file-text {
	//  &:lang(#{$lang}) ~ .custom-file-label::after {
	//    content: @value;
	//  }
	//}
	#each-language-file-input-label(@i: 1) when (@i =< length(@custom-file-text)) {
		// LESS PORT: This gets really funky because a single key/value pair has to be handled
		// differently than a list of key/values. This is because Less will see a single key/value as
		// a space-separated list of two items instead of a comma-separated list of just a single
		// item, so logic is added to handle both cases.
		& when (length(extract(@custom-file-text, @i)) = 1) {
			@lang: extract(@custom-file-text, 1);
			@text: extract(@custom-file-text, 2);

			&:lang(@{lang}) ~ .custom-file-label::after {
				content: @text;
			}
		}
		& when (length(extract(@custom-file-text, @i)) = 2) {
			@item: extract(@custom-file-text, @i);
			@lang: extract(@item, 1);
			@text: extract(@item, 2);

			&:lang(@{lang}) ~ .custom-file-label::after {
				content: @text;
			}

			#each-language-file-input-label((@i + 1));
		}
	} #each-language-file-input-label();
}

.custom-file-label {
	position: absolute;
	top: 0;
	right: 0;
	left: 0;
	z-index: 1;
	height: @custom-file-height;
	padding: @custom-file-padding-y @custom-file-padding-x;
	line-height: @custom-file-line-height;
	color: @custom-file-color;
	background-color: @custom-file-bg;
	border: @custom-file-border-width solid @custom-file-border-color;
	#border-radius(@custom-file-border-radius);
	#box-shadow(@custom-file-box-shadow);

	&::after {
		position: absolute;
		top: 0;
		right: 0;
		bottom: 0;
		z-index: 3;
		display: block;
		height: @custom-file-height-inner;
		padding: @custom-file-padding-y @custom-file-padding-x;
		line-height: @custom-file-line-height;
		color: @custom-file-button-color;
		content: "Browse";
		#gradient-bg(@custom-file-button-bg);
		border-left: @custom-file-border-width solid @custom-file-border-color;
		#border-radius(0 @custom-file-border-radius @custom-file-border-radius 0);
	}
}

// Range
//
// Style range inputs the same across browsers. Vendor-specific rules for psuedo
// elements cannot be mixed. As such, there are no shared styles for focus or
// active states on prefixed selectors.

.custom-range {
	width: 100%;
	padding-left: 0; // Firefox specific
	background-color: transparent;
	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;

	&:focus {
		outline: none;
	}

	&::-moz-focus-outer {
		border: 0;
	}

	&::-webkit-slider-thumb {
		width: @custom-range-thumb-width;
		height: @custom-range-thumb-height;
		margin-top: (-@custom-range-thumb-width * 0.25); // Webkit specific?
		#gradient-bg(@custom-range-thumb-bg);
		border: @custom-range-thumb-border;
		#border-radius(@custom-range-thumb-border-radius);
		#box-shadow(@custom-range-thumb-box-shadow);
		-webkit-appearance: none;
		-moz-appearance: none;
		appearance: none;

		&:focus {
			outline: none;
			box-shadow: @custom-range-thumb-focus-box-shadow; // No mixin for focus accessibility
		}

		&:active {
			#gradient-bg(@custom-range-thumb-active-bg);
		}
	}

	&::-webkit-slider-runnable-track {
		width: @custom-range-track-width;
		height: @custom-range-track-height;
		color: transparent; // Why?
		cursor: @custom-range-track-cursor;
		background-color: @custom-range-track-bg;
		border-color: transparent;
		#border-radius(@custom-range-track-border-radius);
		#box-shadow(@custom-range-track-box-shadow);
	}

	&::-moz-range-thumb {
		width: @custom-range-thumb-width;
		height: @custom-range-thumb-height;
		#gradient-bg(@custom-range-thumb-bg);
		border: @custom-range-thumb-border;
		#border-radius(@custom-range-thumb-border-radius);
		#box-shadow(@custom-range-thumb-box-shadow);
		-webkit-appearance: none;
		-moz-appearance: none;
		appearance: none;

		&:focus {
			outline: none;
			box-shadow: @custom-range-thumb-focus-box-shadow; // No mixin for focus accessibility
		}

		&:active {
			#gradient-bg(@custom-range-thumb-active-bg);
		}
	}

	&::-moz-range-track {
		width: @custom-range-track-width;
		height: @custom-range-track-height;
		color: transparent;
		cursor: @custom-range-track-cursor;
		background-color: @custom-range-track-bg;
		border-color: transparent; // Firefox specific?
		#border-radius(@custom-range-track-border-radius);
		#box-shadow(@custom-range-track-box-shadow);
	}

	&::-ms-thumb {
		width: @custom-range-thumb-width;
		height: @custom-range-thumb-height;
		#gradient-bg(@custom-range-thumb-bg);
		border: @custom-range-thumb-border;
		#border-radius(@custom-range-thumb-border-radius);
		#box-shadow(@custom-range-thumb-box-shadow);
		-webkit-appearance: none;
		-moz-appearance: none;
		appearance: none;

		&:focus {
			outline: none;
			box-shadow: @custom-range-thumb-focus-box-shadow; // No mixin for focus accessibility
		}

		&:active {
			#gradient-bg(@custom-range-thumb-active-bg);
		}
	}

	&::-ms-track {
		width: @custom-range-track-width;
		height: @custom-range-track-height;
		color: transparent;
		cursor: @custom-range-track-cursor;
		background-color: transparent;
		border-color: transparent;
		border-width: (@custom-range-thumb-height * 0.5);
		#box-shadow(@custom-range-track-box-shadow);
	}

	&::-ms-fill-lower {
		background-color: @custom-range-track-bg;
		#border-radius(@custom-range-track-border-radius);
	}

	&::-ms-fill-upper {
		margin-right: 15px; // arbitrary?
		background-color: @custom-range-track-bg;
		#border-radius(@custom-range-track-border-radius);
	}
}