_mixins.scss

/**
 * Breakpoint mixins
 */

@mixin break-huge() {
	@media (min-width: #{ ($break-huge) }) {
		@content;
	}
}

@mixin break-wide() {
	@media (min-width: #{ ($break-wide) }) {
		@content;
	}
}

@mixin break-xlarge() {
	@media (min-width: #{ ($break-xlarge) }) {
		@content;
	}
}

@mixin break-large() {
	@media (min-width: #{ ($break-large) }) {
		@content;
	}
}

@mixin break-medium() {
	@media (min-width: #{ ($break-medium) }) {
		@content;
	}
}

@mixin break-small() {
	@media (min-width: #{ ($break-small) }) {
		@content;
	}
}

@mixin break-mobile() {
	@media (min-width: #{ ($break-mobile) }) {
		@content;
	}
}


/**
 * Long content fade mixin
 *
 * Creates a fading overlay to signify that the content is longer
 * than the space allows.
 */

@mixin long-content-fade($direction: right, $size: 20%, $color: #fff, $edge: 0, $z-index: false) {
	content: "";
	display: block;
	position: absolute;
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;
	pointer-events: none;

	@if $z-index {
		z-index: $z-index;
	}

	@if $direction == "bottom" {
		background: linear-gradient(to top, rgba($color, 0), $color 90%);
		left: $edge;
		right: $edge;
		top: $edge;
		bottom: calc(100% - $size);
		width: auto;
	}

	@if $direction == "top" {
		background: linear-gradient(to bottom, rgba($color, 0), $color 90%);
		top: calc(100% - $size);
		left: $edge;
		right: $edge;
		bottom: $edge;
		width: auto;
	}

	@if $direction == "left" {
		background: linear-gradient(to left, rgba($color, 0), $color 90%);
		top: $edge;
		left: $edge;
		bottom: $edge;
		right: auto;
		width: $size;
		height: auto;
	}

	@if $direction == "right" {
		background: linear-gradient(to right, rgba($color, 0), $color 90%);
		top: $edge;
		bottom: $edge;
		right: $edge;
		left: auto;
		width: $size;
		height: auto;
	}
}

/**
 * Button states and focus styles
 */

// Buttons with rounded corners.
@mixin button-style__disabled {
	opacity: 0.6;
	cursor: default;
}

@mixin button-style__hover {
	background-color: $white;
	color: $dark-gray-900;
	box-shadow: inset 0 0 0 1px $light-gray-500, inset 0 0 0 2px $white, 0 1px 1px rgba($dark-gray-900, 0.2);
}

@mixin button-style__active() {
	outline: none;
	background-color: $white;
	color: $dark-gray-900;
	box-shadow: inset 0 0 0 1px $light-gray-700, inset 0 0 0 2px $white;
}

@mixin button-style__focus-active() {
	background-color: $white;
	color: $dark-gray-900;
	box-shadow: inset 0 0 0 1px $dark-gray-300, inset 0 0 0 2px $white;

	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
	outline-offset: -2px;
}

// Switch.
@mixin switch-style__focus-active() {
	box-shadow: 0 0 0 2px $white, 0 0 0 3px $dark-gray-300;

	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
	outline-offset: 2px;
}

// Formatting Buttons.
@mixin formatting-button-style__hover {
	color: $dark-gray-500;
	box-shadow: inset 0 0 0 1px $dark-gray-500, inset 0 0 0 2px $white;
}

@mixin formatting-button-style__active() {
	outline: none;
	color: $white;
	box-shadow: none;
	background: $dark-gray-500;
}

@mixin formatting-button-style__focus() {
	box-shadow: inset 0 0 0 1px $dark-gray-500, inset 0 0 0 2px $white;

	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
	outline-offset: -2px;
}

// Tabs, Inputs, Square buttons.
@mixin input-style__neutral() {
	box-shadow: 0 0 0 transparent;
	transition: box-shadow 0.1s linear;
	border-radius: $radius-round-rectangle;
	border: $border-width solid $dark-gray-150;
}

@mixin input-style__focus() {
	color: $dark-gray-900;
	border-color: $blue-medium-500;
	box-shadow: 0 0 0 1px $blue-medium-500;

	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
	outline-offset: -2px;
}

// Square buttons.
@mixin square-style__neutral() {
	outline-offset: -1px;
}

@mixin square-style__focus() {
	color: $dark-gray-900;
	outline-offset: -1px;
	outline: 1px dotted $dark-gray-500;
}

// Menu items.
@mixin menu-style__neutral() {
	border: none;
	box-shadow: none;
}

@mixin menu-style__hover() {
	color: $dark-gray-900;
	border: none;
	box-shadow: none;
	background: $light-gray-200;
}

@mixin menu-style__focus() {
	color: $dark-gray-900;
	border: none;
	box-shadow: none;
	outline-offset: -2px;
	outline: 1px dotted $dark-gray-500;
}

// Blocks in the Library.
@mixin block-style__disabled {
	opacity: 0.6;
	cursor: default;
}

@mixin block-style__hover {
	background: $light-gray-200;
	color: $dark-gray-900;
}

@mixin block-style__focus-active() {
	color: $dark-gray-900;
	box-shadow: 0 0 0 2px $blue-medium-500;

	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
	outline-offset: -2px;
}

/**
 * Applies editor left position to the selector passed as argument
 */

@mixin editor-left($selector) {
	#{$selector} { /* Set left position when auto-fold is not on the body element. */
		left: 0;

		@include break-medium() {
			left: $admin-sidebar-width;
		}
	}

	.auto-fold #{$selector} { /* Auto fold is when on smaller breakpoints, nav menu auto collapses. */
		@include break-medium() {
			left: $admin-sidebar-width-collapsed;
		}

		@include break-large() {
			left: $admin-sidebar-width;
		}
	}

	/* Sidebar manually collapsed. */
	.folded #{$selector} {
		left: 0;

		@include break-medium() {
			left: $admin-sidebar-width-collapsed;
		}
	}

	/* Mobile menu opened. */
	@media (max-width: #{ ($break-medium) }) {
		.auto-fold .wp-responsive-open #{$selector} {
			left: $admin-sidebar-width-big;
		}
	}

	/* In small screens with responsive menu expanded there is small white space. */
	@media (max-width: #{ ($break-small) }) {
		.auto-fold .wp-responsive-open #{$selector} {
			margin-left: -18px;
		}
	}

	body.is-fullscreen-mode #{$selector} {
		left: 0 !important;
	}
}

/**
 * Applies editor right position to the selector passed as argument
 */

@mixin editor-right($selector) {
	#{ $selector } {
		right: 0;
	}

	.edit-post-layout.is-sidebar-opened #{ $selector } {
		right: $sidebar-width;
	}
}


/**
 * Styles that are reused verbatim in a few places
 */

@mixin caption-style() {
	margin-top: 0.5em;
	margin-bottom: 1em;
	color: $dark-gray-500;
	text-align: center;
	font-size: $default-font-size;
}

@mixin dropdown-arrow() {
	content: "";
	pointer-events: none;
	display: block;
	width: 0;
	height: 0;
	border-left: 3px solid transparent;
	border-right: 3px solid transparent;
	border-top: 5px solid currentColor;
	margin-left: $grid-size-small;

	// This gives the icon space on the right side consistent with the material
	// icon standards.
	margin-right: 2px;
}