numix-gtk-theme/gtk-3.0/scss/_button.scss

@import "functions";
@import "global";


/*********
 ! Buttons
**********/

@mixin linked_button($bg, $shadow) {
	border: 1px solid border_normal($bg);
	border-radius: 0;
	border-right-style: none;
	border-left-style: none;
	box-shadow: inset -1px 0 border_normal($bg),
				0 1px 2px -1px alpha($shadow, .3);

	&:first-child {
		border-width: 1px;
		border-radius: $roundness;
		border-left-style: solid;
		border-right-style: none;
		border-top-right-radius: 0;
		border-bottom-right-radius: 0;

		&:dir(rtl) {
			border-left-style: none;
			border-right-style: solid;
		}
	}

	&:last-child {
		border-width: 1px;
		border-radius: $roundness;
		border-left-style: none;
		border-right-style: solid;
		border-top-left-radius: 0;
		border-bottom-left-radius: 0;

		&:dir(rtl) {
			border-left-style: solid;
			border-right-style: none;
		}
	}

	&:only-child {
		border-width: 1px;
		border-radius: $roundness;
	}

	&:focus, &:hover {
		box-shadow: inset -1px 0 border_focus($bg),
					0 1px 2px -1px alpha($shadow, .3);
	}

	&:active, &:active:hover,
	&:active:focus, &:active:hover:focus,
	&:checked, &:checked:hover,
	&:checked:focus, &:checked:hover:focus {
		box-shadow: inset -1px 0 border_active($bg),
					inset 1px 0 alpha($shadow, .07),
					inset 0 1px alpha($shadow, .08),
					inset 0 -1px alpha($shadow, .05);
	}

	&:insensitive { box-shadow: inset -1px 0 border_insensitive($bg); }

	&:last-child, &:only-child,
	&:insensitive:last-child, &:insensitive:only-child,
	&:active:insensitive:last-child, &:active:insensitive:only-child,
	&:checked:insensitive:last-child, &:checked:insensitive:only-child { box-shadow: none; }

	&:active:last-child, &:active:only-child,
	&:checked:last-child, &:checked:only-child {
		box-shadow: inset 1px 0 alpha($shadow, .07),
					inset 0 1px alpha($shadow, .08),
					inset -1px 0 alpha($shadow, .07);
	}
}

@mixin button($bg, $fg) {
	@include linear-gradient(shade($bg, 1.05));
	@include border(shade($bg, 1.05));

	padding: ($spacing - 1px) ($spacing + 1px);
	border-width: 1px;
	border-radius: $roundness;
	border-style: solid;
	color: $fg;
	transition: 100ms ease;
	box-shadow: 0 1px 2px -1px alpha($dark_shadow, .3);

	-GtkWidget-focus-padding: 1;
	-GtkWidget-focus-line-width: 0;

	&:focus, &:hover {
		@include linear-gradient(shade($bg, 1.1));

		box-shadow: 0 1px 3px -1px alpha($dark_shadow, .5);
	}

	&:checked, &:active {
		@include linear-gradient(shade($bg, .95));

		box-shadow: inset 1px 0 alpha($dark_shadow, .07),
					inset 0 1px alpha($dark_shadow, .08),
					inset -1px 0 alpha($dark_shadow, .07),
					inset 0 -1px alpha($dark_shadow, .05);
	}

	&:insensitive {
		@include linear-gradient(shade($bg, .95));

		color: mix($bg, $fg, .5);
		box-shadow: none;
	}

	&:active:insensitive,
	&:checked:insensitive {
		@include linear-gradient(shade($bg, .8));

		box-shadow: none;
	}

	&.flat {
		color: inherit;

		&, &:hover, &:focus,
		&:active, &:active:hover, &:active:focus,
		&:checked, &:checked:hover, &:checked:focus {
			border: none;
			background-color: transparent;
			background-image: none;
		}

		// TODO
	}

	&.separator, .separator {
		color: shade($bg, .95);
		border: 1px solid currentColor;

		&:insensitive { color: shade($bg, .85); }
	}

	.linked & { @include linked_button($bg, $dark_shadow); }
}

%close_button {
	border: 1px solid transparent;
	background-color: transparent;
	background-image: none;
	box-shadow: none;

	&:focus, &:hover {
		border: 1px solid alpha(black, 0.3);
		background-color: alpha(white, 0.2);
		background-image: none;
		box-shadow: none;
	}

	&:active, &:checked, &:active:hover, &:checked:hover  {
		border: 1px solid alpha(black, 0.3);
		background-color: alpha(black, 0.1);
		background-image: none;
		box-shadow: none;
	}
}

.button {
	@include button($bg_color, $fg_color);

	&.default { @include button($selected_bg_color, $selected_fg_color); }
}