_mixins.scss

@import "./functions";
@import "./long-content-fade";

/**
 * Breakpoint mixins
 */

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

@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;
	}
}

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

/**
 * Focus styles.
 */

@mixin block-toolbar-button-style__focus() {
	box-shadow: inset 0 0 0 $border-width $white, 0 0 0 var(--wp-admin-border-width-focus) var(--wp-admin-theme-color);

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

// Tabs, Inputs, Square buttons.
@mixin input-style__neutral() {
	box-shadow: 0 0 0 transparent;
	transition: box-shadow 0.1s linear;
	border-radius: $radius-block-ui;
	border: $border-width solid $gray-600;
	@include reduce-motion("transition");
}


@mixin input-style__focus() {
	border-color: var(--wp-admin-theme-color);
	// Expand the default border focus style by .5px to be a total of 1.5px.
	box-shadow: 0 0 0 0.5px var(--wp-admin-theme-color);
	// Windows High Contrast mode will show this outline, but not the box-shadow.
	outline: 2px solid transparent;
}

@mixin button-style__focus() {
	box-shadow: 0 0 0 var(--wp-admin-border-width-focus) var(--wp-admin-theme-color);

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


@mixin button-style-outset__focus($focus-color) {
	box-shadow: 0 0 0 var(--wp-admin-border-width-focus) $white, 0 0 0 calc(2 * var(--wp-admin-border-width-focus)) $focus-color;

	// 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;

		@media (min-width: #{ ($break-medium + 1) }) {
			left: $admin-sidebar-width;
		}
	}

	.auto-fold #{$selector} { /* Auto fold is when on smaller breakpoints, nav menu auto collapses. */
		@media (min-width: #{ ($break-medium + 1) }) {
			left: $admin-sidebar-width-collapsed;
		}

		@media (min-width: #{ ($break-large + 1) }) {
			left: $admin-sidebar-width;
		}
	}

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

		@media (min-width: #{ ($break-medium + 1) }) {
			left: $admin-sidebar-width-collapsed;
		}
	}

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

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

// These are additional styles for all captions, when the theme opts in to block styles.
@mixin caption-style() {
	margin-top: 0.5em;
	margin-bottom: 1em;
}

@mixin caption-style-theme() {
	color: #555;
	font-size: $default-font-size;
	text-align: center;

	.is-dark-theme & {
		color: $light-gray-placeholder;
	}
}

@mixin placeholder-style() {
	border-radius: $radius-block-ui;

	&::before {
		content: "";
		position: absolute;
		top: 0;
		right: 0;
		bottom: 0;
		left: 0;
		pointer-events: none;
		background: currentColor;
		opacity: 0.1;
	}
}

/**
 * Allows users to opt-out of animations via OS-level preferences.
 */

@mixin reduce-motion($property: "") {

	@if $property == "transition" {
		@media (prefers-reduced-motion: reduce) {
			transition-duration: 0s;
			transition-delay: 0s;
		}
	} @else if $property == "animation" {
		@media (prefers-reduced-motion: reduce) {
			animation-duration: 1ms;
			animation-delay: 0s;
		}
	} @else {
		@media (prefers-reduced-motion: reduce) {
			transition-duration: 0s;
			transition-delay: 0s;
			animation-duration: 1ms;
			animation-delay: 0s;
		}
	}
}

@mixin input-control {
	font-family: $default-font;
	padding: 6px 8px;
	@include input-style__neutral();

	/* Fonts smaller than 16px causes mobile safari to zoom. */
	font-size: $mobile-text-min-font-size;
	/* Override core line-height. To be reviewed. */
	line-height: normal;
	@include break-small {
		font-size: $default-font-size;
		/* Override core line-height. To be reviewed. */
		line-height: normal;
	}

	&:focus {
		@include input-style__focus();
	}

	// Use opacity to work in various editor styles.
	&::-webkit-input-placeholder {
		color: $dark-gray-placeholder;
	}

	&::-moz-placeholder {
		opacity: 1; // Necessary because Firefox reduces this from 1.
		color: $dark-gray-placeholder;
	}

	&:-ms-input-placeholder {
		color: $dark-gray-placeholder;
	}
}

@mixin checkbox-control {
	@include input-control;
	border: $border-width solid $gray-900;
	margin-right: $grid-unit-15;
	transition: none;
	border-radius: $radius-block-ui;

	&:focus {
		box-shadow: 0 0 0 ($border-width * 2) $white, 0 0 0 ($border-width * 2 + $border-width-focus-fallback) var(--wp-admin-theme-color);

		// Only visible in Windows High Contrast mode.
		outline: 2px solid transparent;
	}

	&:checked {
		background: var(--wp-admin-theme-color);
		border-color: var(--wp-admin-theme-color);

		// Hide default checkbox styles in IE.
		&::-ms-check {
			opacity: 0;
		}
	}

	&:checked::before,
	&[aria-checked="mixed"]::before {
		margin: -3px -5px;
		color: $white;

		@include break-medium() {
			margin: -4px 0 0 -5px;
		}
	}

	&[aria-checked="mixed"] {
		background: var(--wp-admin-theme-color);
		border-color: var(--wp-admin-theme-color);

		&::before {
			// Inherited from `forms.css`.
			// See: https://github.com/WordPress/wordpress-develop/tree/5.1.1/src/wp-admin/css/forms.css#L122-L132
			content: "\f460";
			float: left;
			display: inline-block;
			vertical-align: middle;
			width: 16px;
			/* stylelint-disable */
			font: normal 30px/1 dashicons;
			/* stylelint-enable */
			speak: none;
			-webkit-font-smoothing: antialiased;
			-moz-osx-font-smoothing: grayscale;

			@include break-medium() {
				float: none;
				font-size: 21px;
			}
		}
	}

	&[aria-disabled="true"],
	&:disabled {
		background: $gray-100;
		border-color: $gray-300;
		cursor: default;

		// Override style inherited from wp-admin. Required to avoid degraded appearance on different backgrounds.
		opacity: 1;
	}
}

@mixin radio-control {
	@include input-control;
	border: $border-width solid $gray-900;
	margin-right: $grid-unit-15;
	transition: none;
	border-radius: $radius-round;
	width: $radio-input-size-sm;
	height: $radio-input-size-sm;

	@include break-small() {
		height: $radio-input-size;
		width: $radio-input-size;
	}

	&:checked::before {
		box-sizing: inherit;
		width: 8px;
		height: 8px;
		transform: translate(7px, 7px);
		margin: 0;
		background-color: $white;

		// This border serves as a background color in Windows High Contrast mode.
		border: 4px solid $white;

		@include break-small() {
			transform: translate(5px, 5px);
		}
	}

	&:focus {
		box-shadow: 0 0 0 ($border-width * 2) $white, 0 0 0 ($border-width * 2 + $border-width-focus-fallback) var(--wp-admin-theme-color);

		// Only visible in Windows High Contrast mode.
		outline: 2px solid transparent;
	}

	&:checked {
		background: var(--wp-admin-theme-color);
		border-color: var(--wp-admin-theme-color);
	}
}

/**
 * Reset default styles for JavaScript UI based pages.
 * This is a WP-admin agnostic reset
 */

@mixin reset {
	box-sizing: border-box;

	*,
	*::before,
	*::after {
		box-sizing: inherit;
	}
}

// The editor input reset with increased specificity to avoid theme styles bleeding in.
@mixin editor-input-reset() {
	font-family: $editor-html-font !important;
	color: $gray-900 !important;
	background: $white !important;
	padding: $grid-unit-15 !important;
	border: $border-width solid $gray-900 !important;
	box-shadow: none !important;
	border-radius: $radius-block-ui !important;

	// Fonts smaller than 16px causes mobile safari to zoom.
	font-size: $mobile-text-min-font-size !important;
	@include break-small {
		font-size: $default-font-size !important;
	}

	&:focus {
		border-color: var(--wp-admin-theme-color) !important;
		box-shadow: 0 0 0 ($border-width-focus-fallback - $border-width) var(--wp-admin-theme-color) !important;

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

/**
 * Reset the WP Admin page styles for Gutenberg-like pages.
 */

@mixin wp-admin-reset( $content-container ) {
	background: $white;

	#wpcontent {
		padding-left: 0;
	}

	#wpbody-content {
		padding-bottom: 0;
	}

	/* We hide legacy notices in Gutenberg Based Pages, because they were not designed in a way that scaled well.
	   Plugins can use Gutenberg notices if they need to pass on information to the user when they are editing. */
	#wpbody-content > div:not(#{ $content-container }):not(#screen-meta) {
		display: none;
	}

	#wpfooter {
		display: none;
	}

	.a11y-speak-region {
		left: -1px;
		top: -1px;
	}

	ul#adminmenu a.wp-has-current-submenu::after,
	ul#adminmenu > li.current > a.current::after {
		border-right-color: $white;
	}

	.media-frame select.attachment-filters:last-of-type {
		width: auto;
		max-width: 100%;
	}
}

@mixin admin-scheme($color-primary) {
	// Define RGB equivalents for use in rgba function.
	// Hexadecimal css vars do not work in the rgba function.
	--wp-admin-theme-color: #{$color-primary};
	--wp-admin-theme-color--rgb: #{hex-to-rgb($color-primary)};
	// Darker shades.
	--wp-admin-theme-color-darker-10: #{darken($color-primary, 5%)};
	--wp-admin-theme-color-darker-10--rgb: #{hex-to-rgb(darken($color-primary, 5%))};
	--wp-admin-theme-color-darker-20: #{darken($color-primary, 10%)};
	--wp-admin-theme-color-darker-20--rgb: #{hex-to-rgb(darken($color-primary, 10%))};

	// Focus style width.
	// Avoid rounding issues by showing a whole 2px for 1x screens, and 1.5px on high resolution screens.
	--wp-admin-border-width-focus: 2px;
	@media ( -webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
		--wp-admin-border-width-focus: 1.5px;
	}
}

@mixin wordpress-admin-schemes() {
	body.admin-color-light {
		@include admin-scheme(#0085ba);
	}

	body.admin-color-modern {
		@include admin-scheme(#3858e9);
	}

	body.admin-color-blue {
		@include admin-scheme(#096484);
	}

	body.admin-color-coffee {
		@include admin-scheme(#46403c);
	}

	body.admin-color-ectoplasm {
		@include admin-scheme(#523f6d);
	}

	body.admin-color-midnight {
		@include admin-scheme(#e14d43);
	}

	body.admin-color-ocean {
		@include admin-scheme(#627c83);
	}

	body.admin-color-sunrise {
		@include admin-scheme(#dd823b);
	}
}

// Deprecated from UI, kept for back-compat.
@mixin background-colors-deprecated() {
	.has-very-light-gray-background-color {
		background-color: #eee;
	}

	.has-very-dark-gray-background-color {
		background-color: #313131;
	}
}

// Deprecated from UI, kept for back-compat.
@mixin foreground-colors-deprecated() {
	.has-very-light-gray-color {
		color: #eee;
	}

	.has-very-dark-gray-color {
		color: #313131;
	}
}

// Deprecated from UI, kept for back-compat.
@mixin gradient-colors-deprecated() {
	/*
	 * Our classes uses the same values we set for gradient value attributes,
	 * and we can not use spacing because of WP multi site kses rule.
	 */

	/* stylelint-disable function-comma-space-after */
	.has-vivid-green-cyan-to-vivid-cyan-blue-gradient-background {
		background: linear-gradient(135deg,rgba(0,208,132,1) 0%,rgba(6,147,227,1) 100%);
	}

	.has-purple-crush-gradient-background {
		background: linear-gradient(135deg,rgb(52,226,228) 0%,rgb(71,33,251) 50%,rgb(171,29,254) 100%);
	}

	.has-hazy-dawn-gradient-background {
		background: linear-gradient(135deg,rgb(250,172,168) 0%,rgb(218,208,236) 100%);
	}

	.has-subdued-olive-gradient-background {
		background: linear-gradient(135deg,rgb(250,250,225) 0%,rgb(103,166,113) 100%);
	}

	.has-atomic-cream-gradient-background {
		background: linear-gradient(135deg,rgb(253,215,154) 0%,rgb(0,74,89) 100%);
	}

	.has-nightshade-gradient-background {
		background: linear-gradient(135deg,rgb(51,9,104) 0%,rgb(49,205,207) 100%);
	}

	.has-midnight-gradient-background {
		background: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);
	}
	/* stylelint-enable function-comma-space-after */
}

@mixin custom-scrollbars-on-hover($handle-color, $handle-color-hover) {

	// WebKit
	&::-webkit-scrollbar {
		width: 12px;
		height: 12px;
	}
	&::-webkit-scrollbar-track {
		background-color: transparent;
	}
	&::-webkit-scrollbar-thumb {
		background-color: $handle-color;
		border-radius: 8px;
		border: 3px solid transparent;
		background-clip: padding-box;
	}
	&:hover::-webkit-scrollbar-thumb, // This needs specificity.
	&:focus::-webkit-scrollbar-thumb,
	&:focus-within::-webkit-scrollbar-thumb {
		background-color: $handle-color-hover;
	}

	// Firefox 109+ and Chrome 111+
	scrollbar-width: thin;
	scrollbar-gutter: stable both-edges;
	scrollbar-color: $handle-color transparent; // Syntax, "dark", "light", or "#handle-color #track-color"

	&:hover,
	&:focus,
	&:focus-within {
		scrollbar-color: $handle-color-hover transparent;
	}

	// Needed to fix a Safari rendering issue.
	will-change: transform;

	// Always show scrollbar on Mobile devices.
	@media (hover: none) {
		& {
			scrollbar-color: $handle-color-hover transparent;
		}
	}
}