get_loading_optimization_attributes() instead.
 * @see wp_get_loading_optimization_attributes()
 *
 * @global WP_Query $wp_query WordPress Query object.
 *
 * @param string $context Context for the element for which the `loading` attribute value is requested.
 * @return string|bool The default `loading` attribute value. Either 'lazy', 'eager', or a boolean `false`, to indicate
 *                     that the `loading` attribute should be skipped.
 */
function wp_get_loading_attr_default( $context ) {
	_deprecated_function( __FUNCTION__, '6.3.0', 'wp_get_loading_optimization_attributes()' );
	global $wp_query;

	// Skip lazy-loading for the overall block template, as it is handled more granularly.
	if ( 'template' === $context ) {
		return false;
	}

	/*
	 * Do not lazy-load images in the header block template part, as they are likely above the fold.
	 * For classic themes, this is handled in the condition below using the 'get_header' action.
	 */
	$header_area = WP_TEMPLATE_PART_AREA_HEADER;
	if ( "template_part_{$header_area}" === $context ) {
		return false;
	}

	// Special handling for programmatically created image tags.
	if ( 'the_post_thumbnail' === $context || 'wp_get_attachment_image' === $context ) {
		/*
		 * Skip programmatically created images within post content as they need to be handled together with the other
		 * images within the post content.
		 * Without this clause, they would already be counted below which skews the number and can result in the first
		 * post content image being lazy-loaded only because there are images elsewhere in the post content.
		 */
		if ( doing_filter( 'the_content' ) ) {
			return false;
		}

		// Conditionally skip lazy-loading on images before the loop.
		if (
			// Only apply for main query but before the loop.
			$wp_query->before_loop && $wp_query->is_main_query()
			/*
			 * Any image before the loop, but after the header has started should not be lazy-loaded,
			 * except when the footer has already started which can happen when the current template
			 * does not include any loop.
			 */
			&& did_action( 'get_header' ) && ! did_action( 'get_footer' )
		) {
			return false;
		}
	}

	/*
	 * The first elements in 'the_content' or 'the_post_thumbnail' should not be lazy-loaded,
	 * as they are likely above the fold.
	 */
	if ( 'the_content' === $context || 'the_post_thumbnail' === $context ) {
		// Only elements within the main query loop have special handling.
		if ( is_admin() || ! in_the_loop() || ! is_main_query() ) {
			return 'lazy';
		}

		// Increase the counter since this is a main query content element.
		$content_media_count = wp_increase_content_media_count();

		// If the count so far is below the threshold, return `false` so that the `loading` attribute is omitted.
		if ( $content_media_count <= wp_omit_loading_attr_threshold() ) {
			return false;
		}

		// For elements after the threshold, lazy-load them as usual.
		return 'lazy';
	}

	// Lazy-load by default for any unknown context.
	return 'lazy';
}

/**
 * Adds `loading` attribute to an `img` HTML tag.
 *
 * @since 5.5.0
 * @deprecated 6.3.0 Use wp_img_tag_add_loading_optimization_attrs() instead.
 * @see wp_img_tag_add_loading_optimization_attrs()
 *
 * @param string $image   The HTML `img` tag where the attribute should be added.
 * @param string $context Additional context to pass to the filters.
 * @return string Converted `img` tag with `loading` attribute added.
 */
function wp_img_tag_add_loading_attr( $image, $context ) {
	_deprecated_function( __FUNCTION__, '6.3.0', 'wp_img_tag_add_loading_optimization_attrs()' );
	/*
	 * Get loading attribute value to use. This must occur before the conditional check below so that even images that
	 * are ineligible for being lazy-loaded are considered.
	 */
	$value = wp_get_loading_attr_default( $context );

	// Images should have source and dimension attributes for the `loading` attribute to be added.
	if ( ! str_contains( $image, ' src="' ) || ! str_contains( $image, ' width="' ) || ! str_contains( $image, ' height="' ) ) {
		return $image;
	}

	/** This filter is documented in wp-admin/includes/media.php */
	$value = apply_filters( 'wp_img_tag_add_loading_attr', $value, $image, $context );

	if ( $value ) {
		if ( ! in_array( $value, array( 'lazy', 'eager' ), true ) ) {
			$value = 'lazy';
		}

		return str_replace( '<img', '<img loading="' . esc_attr( $value ) . '"', $image );
	}

	return $image;
}

/**
 * Takes input from [0, n] and returns it as [0, 1].
 *
 * Direct port of TinyColor's function, lightly simplified to maintain
 * consistency with TinyColor.
 *
 * @link https://github.com/bgrins/TinyColor
 *
 * @since 5.8.0
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param mixed $n   Number of unknown type.
 * @param int   $max Upper value of the range to bound to.
 * @return float Value in the range [0, 1].
 */
function wp_tinycolor_bound01( $n, $max ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );
	if ( 'string' === gettype( $n ) && str_contains( $n, '.' ) && 1 === (float) $n ) {
		$n = '100%';
	}

	$n = min( $max, max( 0, (float) $n ) );

	// Automatically convert percentage into number.
	if ( 'string' === gettype( $n ) && str_contains( $n, '%' ) ) {
		$n = (int) ( $n * $max ) / 100;
	}

	// Handle floating point rounding errors.
	if ( ( abs( $n - $max ) < 0.000001 ) ) {
		return 1.0;
	}

	// Convert into [0, 1] range if it isn't already.
	return ( $n % $max ) / (float) $max;
}

/**
 * Direct port of tinycolor's boundAlpha function to maintain consistency with
 * how tinycolor works.
 *
 * @link https://github.com/bgrins/TinyColor
 *
 * @since 5.9.0
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param mixed $n Number of unknown type.
 * @return float Value in the range [0,1].
 */
function _wp_tinycolor_bound_alpha( $n ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	if ( is_numeric( $n ) ) {
		$n = (float) $n;
		if ( $n >= 0 && $n <= 1 ) {
			return $n;
		}
	}
	return 1;
}

/**
 * Rounds and converts values of an RGB object.
 *
 * Direct port of TinyColor's function, lightly simplified to maintain
 * consistency with TinyColor.
 *
 * @link https://github.com/bgrins/TinyColor
 *
 * @since 5.8.0
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param array $rgb_color RGB object.
 * @return array Rounded and converted RGB object.
 */
function wp_tinycolor_rgb_to_rgb( $rgb_color ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	return array(
		'r' => wp_tinycolor_bound01( $rgb_color['r'], 255 ) * 255,
		'g' => wp_tinycolor_bound01( $rgb_color['g'], 255 ) * 255,
		'b' => wp_tinycolor_bound01( $rgb_color['b'], 255 ) * 255,
	);
}

/**
 * Helper function for hsl to rgb conversion.
 *
 * Direct port of TinyColor's function, lightly simplified to maintain
 * consistency with TinyColor.
 *
 * @link https://github.com/bgrins/TinyColor
 *
 * @since 5.8.0
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param float $p first component.
 * @param float $q second component.
 * @param float $t third component.
 * @return float R, G, or B component.
 */
function wp_tinycolor_hue_to_rgb( $p, $q, $t ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	if ( $t < 0 ) {
		++$t;
	}
	if ( $t > 1 ) {
		--$t;
	}
	if ( $t < 1 / 6 ) {
		return $p + ( $q - $p ) * 6 * $t;
	}
	if ( $t < 1 / 2 ) {
		return $q;
	}
	if ( $t < 2 / 3 ) {
		return $p + ( $q - $p ) * ( 2 / 3 - $t ) * 6;
	}
	return $p;
}

/**
 * Converts an HSL object to an RGB object with converted and rounded values.
 *
 * Direct port of TinyColor's function, lightly simplified to maintain
 * consistency with TinyColor.
 *
 * @link https://github.com/bgrins/TinyColor
 *
 * @since 5.8.0
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param array $hsl_color HSL object.
 * @return array Rounded and converted RGB object.
 */
function wp_tinycolor_hsl_to_rgb( $hsl_color ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	$h = wp_tinycolor_bound01( $hsl_color['h'], 360 );
	$s = wp_tinycolor_bound01( $hsl_color['s'], 100 );
	$l = wp_tinycolor_bound01( $hsl_color['l'], 100 );

	if ( 0 === $s ) {
		// Achromatic.
		$r = $l;
		$g = $l;
		$b = $l;
	} else {
		$q = $l < 0.5 ? $l * ( 1 + $s ) : $l + $s - $l * $s;
		$p = 2 * $l - $q;
		$r = wp_tinycolor_hue_to_rgb( $p, $q, $h + 1 / 3 );
		$g = wp_tinycolor_hue_to_rgb( $p, $q, $h );
		$b = wp_tinycolor_hue_to_rgb( $p, $q, $h - 1 / 3 );
	}

	return array(
		'r' => $r * 255,
		'g' => $g * 255,
		'b' => $b * 255,
	);
}

/**
 * Parses hex, hsl, and rgb CSS strings using the same regex as TinyColor v1.4.2
 * used in the JavaScript. Only colors output from react-color are implemented.
 *
 * Direct port of TinyColor's function, lightly simplified to maintain
 * consistency with TinyColor.
 *
 * @link https://github.com/bgrins/TinyColor
 * @link https://github.com/casesandberg/react-color/
 *
 * @since 5.8.0
 * @since 5.9.0 Added alpha processing.
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param string $color_str CSS color string.
 * @return array RGB object.
 */
function wp_tinycolor_string_to_rgb( $color_str ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	$color_str = strtolower( trim( $color_str ) );

	$css_integer = '[-\\+]?\\d+%?';
	$css_number  = '[-\\+]?\\d*\\.\\d+%?';

	$css_unit = '(?:' . $css_number . ')|(?:' . $css_integer . ')';

	$permissive_match3 = '[\\s|\\(]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')\\s*\\)?';
	$permissive_match4 = '[\\s|\\(]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')\\s*\\)?';

	$rgb_regexp = '/^rgb' . $permissive_match3 . '$/';
	if ( preg_match( $rgb_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => $match[1],
				'g' => $match[2],
				'b' => $match[3],
			)
		);

		$rgb['a'] = 1;

		return $rgb;
	}

	$rgba_regexp = '/^rgba' . $permissive_match4 . '$/';
	if ( preg_match( $rgba_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => $match[1],
				'g' => $match[2],
				'b' => $match[3],
			)
		);

		$rgb['a'] = _wp_tinycolor_bound_alpha( $match[4] );

		return $rgb;
	}

	$hsl_regexp = '/^hsl' . $permissive_match3 . '$/';
	if ( preg_match( $hsl_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_hsl_to_rgb(
			array(
				'h' => $match[1],
				's' => $match[2],
				'l' => $match[3],
			)
		);

		$rgb['a'] = 1;

		return $rgb;
	}

	$hsla_regexp = '/^hsla' . $permissive_match4 . '$/';
	if ( preg_match( $hsla_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_hsl_to_rgb(
			array(
				'h' => $match[1],
				's' => $match[2],
				'l' => $match[3],
			)
		);

		$rgb['a'] = _wp_tinycolor_bound_alpha( $match[4] );

		return $rgb;
	}

	$hex8_regexp = '/^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/';
	if ( preg_match( $hex8_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => base_convert( $match[1], 16, 10 ),
				'g' => base_convert( $match[2], 16, 10 ),
				'b' => base_convert( $match[3], 16, 10 ),
			)
		);

		$rgb['a'] = _wp_tinycolor_bound_alpha(
			base_convert( $match[4], 16, 10 ) / 255
		);

		return $rgb;
	}

	$hex6_regexp = '/^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/';
	if ( preg_match( $hex6_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => base_convert( $match[1], 16, 10 ),
				'g' => base_convert( $match[2], 16, 10 ),
				'b' => base_convert( $match[3], 16, 10 ),
			)
		);

		$rgb['a'] = 1;

		return $rgb;
	}

	$hex4_regexp = '/^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/';
	if ( preg_match( $hex4_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => base_convert( $match[1] . $match[1], 16, 10 ),
				'g' => base_convert( $match[2] . $match[2], 16, 10 ),
				'b' => base_convert( $match[3] . $match[3], 16, 10 ),
			)
		);

		$rgb['a'] = _wp_tinycolor_bound_alpha(
			base_convert( $match[4] . $match[4], 16, 10 ) / 255
		);

		return $rgb;
	}

	$hex3_regexp = '/^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/';
	if ( preg_match( $hex3_regexp, $color_str, $match ) ) {
		$rgb = wp_tinycolor_rgb_to_rgb(
			array(
				'r' => base_convert( $match[1] . $match[1], 16, 10 ),
				'g' => base_convert( $match[2] . $match[2], 16, 10 ),
				'b' => base_convert( $match[3] . $match[3], 16, 10 ),
			)
		);

		$rgb['a'] = 1;

		return $rgb;
	}

	/*
	 * The JS color picker considers the string "transparent" to be a hex value,
	 * so we need to handle it here as a special case.
	 */
	if ( 'transparent' === $color_str ) {
		return array(
			'r' => 0,
			'g' => 0,
			'b' => 0,
			'a' => 0,
		);
	}
}

/**
 * Returns the prefixed id for the duotone filter for use as a CSS id.
 *
 * @since 5.9.1
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param array $preset Duotone preset value as seen in theme.json.
 * @return string Duotone filter CSS id.
 */
function wp_get_duotone_filter_id( $preset ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );
	return WP_Duotone::get_filter_id_from_preset( $preset );
}

/**
 * Returns the CSS filter property url to reference the rendered SVG.
 *
 * @since 5.9.0
 * @since 6.1.0 Allow unset for preset colors.
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param array $preset Duotone preset value as seen in theme.json.
 * @return string Duotone CSS filter property url value.
 */
function wp_get_duotone_filter_property( $preset ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );
	return WP_Duotone::get_filter_css_property_value_from_preset( $preset );
}

/**
 * Returns the duotone filter SVG string for the preset.
 *
 * @since 5.9.1
 * @deprecated 6.3.0
 *
 * @access private
 *
 * @param array $preset Duotone preset value as seen in theme.json.
 * @return string Duotone SVG filter.
 */
function wp_get_duotone_filter_svg( $preset ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );
	return WP_Duotone::get_filter_svg_from_preset( $preset );
}

/**
 * Registers the style and colors block attributes for block types that support it.
 *
 * @since 5.8.0
 * @deprecated 6.3.0 Use WP_Duotone::register_duotone_support() instead.
 *
 * @access private
 *
 * @param WP_Block_Type $block_type Block Type.
 */
function wp_register_duotone_support( $block_type ) {
	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Duotone::register_duotone_support()' );
	return WP_Duotone::register_duotone_support( $block_type );
}

/**
 * Renders out the duotone stylesheet and SVG.
 *
 * @since 5.8.0
 * @since 6.1.0 Allow unset for preset colors.
 * @deprecated 6.3.0 Use WP_Duotone::render_duotone_support() instead.
 *
 * @access private
 *
 * @param string $block_content Rendered block content.
 * @param array  $block         Block object.
 * @return string Filtered block content.
 */
function wp_render_duotone_support( $block_content, $block ) {
	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Duotone::render_duotone_support()' );
	$wp_block = new WP_Block( $block );
	return WP_Duotone::render_duotone_support( $block_content, $block, $wp_block );
}

/**
 * Returns a string containing the SVGs to be referenced as filters (duotone).
 *
 * @since 5.9.1
 * @deprecated 6.3.0 SVG generation is handled on a per-block basis in block supports.
 *
 * @return string
 */
function wp_get_global_styles_svg_filters() {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	/*
	 * Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme
	 * developer's workflow.
	 */
	$can_use_cached = ! wp_is_development_mode( 'theme' );
	$cache_group    = 'theme_json';
	$cache_key      = 'wp_get_global_styles_svg_filters';
	if ( $can_use_cached ) {
		$cached = wp_cache_get( $cache_key, $cache_group );
		if ( $cached ) {
			return $cached;
		}
	}

	$supports_theme_json = wp_theme_has_theme_json();

	$origins = array( 'default', 'theme', 'custom' );
	if ( ! $supports_theme_json ) {
		$origins = array( 'default' );
	}

	$tree = WP_Theme_JSON_Resolver::get_merged_data();
	$svgs = $tree->get_svg_filters( $origins );

	if ( $can_use_cached ) {
		wp_cache_set( $cache_key, $svgs, $cache_group );
	}

	return $svgs;
}

/**
 * Renders the SVG filters supplied by theme.json.
 *
 * Note that this doesn't render the per-block user-defined
 * filters which are handled by wp_render_duotone_support,
 * but it should be rendered before the filtered content
 * in the body to satisfy Safari's rendering quirks.
 *
 * @since 5.9.1
 * @deprecated 6.3.0 SVG generation is handled on a per-block basis in block supports.
 */
function wp_global_styles_render_svg_filters() {
	_deprecated_function( __FUNCTION__, '6.3.0' );

	/*
	 * When calling via the in_admin_header action, we only want to render the
	 * SVGs on block editor pages.
	 */
	if (
		is_admin() &&
		! get_current_screen()->is_block_editor()
	) {
		return;
	}

	$filters = wp_get_global_styles_svg_filters();
	if ( ! empty( $filters ) ) {
		echo $filters;
	}
}

/**
 * Build an array with CSS classes and inline styles defining the colors
 * which will be applied to the navigation markup in the front-end.
 *
 * @since 5.9.0
 * @deprecated 6.3.0 This was removed from the Navigation Submenu block in favour of `wp_apply_colors_support()`.
 *                   `wp_apply_colors_support()` returns an array with similar class and style values,
 *                   but with different keys: `class` and `style`.
 *
 * @param  array $context     Navigation block context.
 * @param  array $attributes  Block attributes.
 * @param  bool  $is_sub_menu Whether the block is a sub-menu.
 * @return array Colors CSS classes and inline styles.
 */
function block_core_navigation_submenu_build_css_colors( $context, $attributes, $is_sub_menu = false ) {
	_deprecated_function( __FUNCTION__, '6.3.0' );
	$colors = array(
		'css_classes'   => array(),
		'inline_styles' => '',
	);

	// Text color.
	$named_text_color  = null;
	$custom_text_color = null;

	if ( $is_sub_menu && array_key_exists( 'customOverlayTextColor', $context ) ) {
		$custom_text_color = $context['customOverlayTextColor'];
	} elseif ( $is_sub_menu && array_key_exists( 'overlayTextColor', $context ) ) {
		$named_text_color = $context['overlayTextColor'];
	} elseif ( array_key_exists( 'customTextColor', $context ) ) {
		$custom_text_color = $context['customTextColor'];
	} elseif ( array_key_exists( 'textColor', $context ) ) {
		$named_text_color = $context['textColor'];
	} elseif ( isset( $context['style']['color']['text'] ) ) {
		$custom_text_color = $context['style']['color']['text'];
	}

	// If has text color.
	if ( ! is_null( $named_text_color ) ) {
		// Add the color class.
		array_push( $colors['css_classes'], 'has-text-color', sprintf( 'has-%s-color', $named_text_color ) );
	} elseif ( ! is_null( $custom_text_color ) ) {
		// Add the custom color inline style.
		$colors['css_classes'][]  = 'has-text-color';
		$colors['inline_styles'] .= sprintf( 'color: %s;', $custom_text_color );
	}

	// Background color.
	$named_background_color  = null;
	$custom_background_color = null;

	if ( $is_sub_menu && array_key_exists( 'customOverlayBackgroundColor', $context ) ) {
		$custom_background_color = $context['customOverlayBackgroundColor'];
	} elseif ( $is_sub_menu && array_key_exists( 'overlayBackgroundColor', $context ) ) {
		$named_background_color = $context['overlayBackgroundColor'];
	} elseif ( array_key_exists( 'customBackgroundColor', $context ) ) {
		$custom_background_color = $context['customBackgroundColor'];
	} elseif ( array_key_exists( 'backgroundColor', $context ) ) {
		$named_background_color = $context['backgroundColor'];
	} elseif ( isset( $context['style']['color']['background'] ) ) {
		$custom_background_color = $context['style']['color']['background'];
	}

	// If has background color.
	if ( ! is_null( $named_background_color ) ) {
		// Add the background-color class.
		array_push( $colors['css_classes'], 'has-background', sprintf( 'has-%s-background-color', $named_background_color ) );
	} elseif ( ! is_null( $custom_background_color ) ) {
		// Add the custom background-color inline style.
		$colors['css_classes'][]  = 'has-background';
		$colors['inline_styles'] .= sprintf( 'background-color: %s;', $custom_background_color );
	}

	return $colors;
}