<?php
/**
* WP_Duotone class
*
* Parts of this source were derived and modified from colord,
* released under the MIT license.
*
* https://github.com/omgovich/colord
*
* Copyright (c) 2020 Vlad Shilov omgovich@ya.ru
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @package WordPress
* @since 6.3.0
*/

/**
* Manages duotone block supports and global styles.
*
* @access private
*/
class WP_Duotone {
/**
* Block names from global, theme, and custom styles that use duotone presets and the slug of
* the preset they are using.
*
* Example:
* [
* 'core/featured-image' => 'blue-orange',
* …
* ]
*
* @internal
*
* @since 6.3.0
*
* @var array
*/
private static $global_styles_block_names;

/**
* An array of duotone filter data from global, theme, and custom presets.
*
* Example:
* [
* 'wp-duotone-blue-orange' => [
* 'slug' => 'blue-orange',
* 'colors' => [ '#0000ff', '#ffcc00' ],
* ],
* 'wp-duotone-red-yellow' => [
* 'slug' => 'red-yellow',
* 'colors' => [ '#cc0000', '#ffff33' ],
* ],
* …
* ]
*
* @internal
*
* @since 6.3.0
*
* @var array
*/
private static $global_styles_presets;

/**
* All of the duotone filter data from presets for CSS custom properties on
* the page.
*
* Example:
* [
* 'wp-duotone-blue-orange' => [
* 'slug' => 'blue-orange',
* 'colors' => [ '#0000ff', '#ffcc00' ],
* ],
* …
* ]
*
* @internal
*
* @since 6.3.0
*
* @var array
*/
private static $used_global_styles_presets = array();

/**
* All of the duotone filter data for SVGs on the page. Includes both
* presets and custom filters.
*
* Example:
* [
* 'wp-duotone-blue-orange' => [
* 'slug' => 'blue-orange',
* 'colors' => [ '#0000ff', '#ffcc00' ],
* ],
* 'wp-duotone-000000-ffffff-2' => [
* 'slug' => '000000-ffffff-2',
* 'colors' => [ '#000000', '#ffffff' ],
* ],
* …
* ]
*
* @internal
*
* @since 6.3.0
*
* @var array
*/
private static $used_svg_filter_data = array();

/**
* All of the block CSS declarations for styles on the page.
*
* Example:
* [
* [
* 'selector' => '.wp-duotone-000000-ffffff-2.wp-block-image img',
* 'declarations' => [
* 'filter' => 'url(#wp-duotone-000000-ffffff-2)',
* ],
* ],
* …
* ]
*
* @internal
*
* @since 6.3.0
*
* @var array
*/
private static $block_css_declarations = array();

/**
* Clamps a value between an upper and lower bound.
*
* Direct port of colord's clamp function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L23 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param float $number The number to clamp.
* @param float $min The minimum value.
* @param float $max The maximum value.
* @return float The clamped value.
*/
private static function colord_clamp( $number, $min = 0, $max = 1 ) {
return $number > $max ? $max : ( $number > $min ? $number : $min );
}

/**
* Processes and clamps a degree (angle) value properly.
*
* Direct port of colord's clampHue function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L32 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param float $degrees The hue to clamp.
* @return float The clamped hue.
*/
private static function colord_clamp_hue( $degrees ) {
$degrees = is_finite( $degrees ) ? $degrees % 360 : 0;
return $degrees > 0 ? $degrees : $degrees + 360;
}

/**
* Converts a hue value to degrees from 0 to 360 inclusive.
*
* Direct port of colord's parseHue function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L40 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param float $value The hue value to parse.
* @param string $unit The unit of the hue value.
* @return float The parsed hue value.
*/
private static function colord_parse_hue( $value, $unit = 'deg' ) {
$angle_units = array(
'grad' => 360 / 400,
'turn' => 360,
'rad' => 360 / ( M_PI * 2 ),
);

$factor = isset( $angle_units[ $unit ] ) ? $angle_units[ $unit ] : 1;

return (float) $value * $factor;
}

/**
* Parses any valid Hex3, Hex4, Hex6 or Hex8 string and converts it to an RGBA object.
*
* Direct port of colord's parseHex function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hex.ts#L8 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param string $hex The hex string to parse.
* @return array|null An array of RGBA values or null if the hex string is invalid.
*/
private static function colord_parse_hex( $hex ) {
$is_match = preg_match(
'/^#([0-9a-f]{3,8})$/i',
$hex,
$hex_match
);

if ( ! $is_match ) {
return null;
}

$hex = $hex_match[1];

if ( 4 >= strlen( $hex ) ) {
return array(
'r' => (int) base_convert( $hex[0] . $hex[0], 16, 10 ),
'g' => (int) base_convert( $hex[1] . $hex[1], 16, 10 ),
'b' => (int) base_convert( $hex[2] . $hex[2], 16, 10 ),
'a' => 4 === strlen( $hex ) ? round( base_convert( $hex[3] . $hex[3], 16, 10 ) / 255, 2 ) : 1,
);
}

if ( 6 === strlen( $hex ) || 8 === strlen( $hex ) ) {
return array(
'r' => (int) base_convert( substr( $hex, 0, 2 ), 16, 10 ),
'g' => (int) base_convert( substr( $hex, 2, 2 ), 16, 10 ),
'b' => (int) base_convert( substr( $hex, 4, 2 ), 16, 10 ),
'a' => 8 === strlen( $hex ) ? round( (int) base_convert( substr( $hex, 6, 2 ), 16, 10 ) / 255, 2 ) : 1,
);
}

return null;
}

/**
* Clamps an array of RGBA values.
*
* Direct port of colord's clampRgba function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgb.ts#L5 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param array $rgba The RGBA array to clamp.
* @return array The clamped RGBA array.
*/
private static function colord_clamp_rgba( $rgba ) {
$rgba['r'] = self::colord_clamp( $rgba['r'], 0, 255 );
$rgba['g'] = self::colord_clamp( $rgba['g'], 0, 255 );
$rgba['b'] = self::colord_clamp( $rgba['b'], 0, 255 );
$rgba['a'] = self::colord_clamp( $rgba['a'] );

return $rgba;
}

/**
* Parses a valid RGB[A] CSS color function/string.
*
* Direct port of colord's parseRgbaString function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgbString.ts#L18 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param string $input The RGBA string to parse.
* @return array|null An array of RGBA values or null if the RGB string is invalid.
*/
private static function colord_parse_rgba_string( $input ) {
// Functional syntax.
$is_match = preg_match(
'/^rgba?\(\s*([+-]?\d*\.?\d+)(%)?\s*,\s*([+-]?\d*\.?\d+)(%)?\s*,\s*([+-]?\d*\.?\d+)(%)?\s*(?:,\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',
$input,
$match
);

if ( ! $is_match ) {
// Whitespace syntax.
$is_match = preg_match(
'/^rgba?\(\s*([+-]?\d*\.?\d+)(%)?\s+([+-]?\d*\.?\d+)(%)?\s+([+-]?\d*\.?\d+)(%)?\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',
$input,
$match
);
}

if ( ! $is_match ) {
return null;
}

/*
* For some reason, preg_match doesn't include empty matches at the end
* of the array, so we add them manually to make things easier later.
*/
for ( $i = 1; $i <= 8; $i++ ) {
if ( ! isset( $match[ $i ] ) ) {
$match[ $i ] = '';
}
}

if ( $match[2] !== $match[4] || $match[4] !== $match[6] ) {
return null;
}

return self::colord_clamp_rgba(
array(
'r' => (float) $match[1] / ( $match[2] ? 100 / 255 : 1 ),
'g' => (float) $match[3] / ( $match[4] ? 100 / 255 : 1 ),
'b' => (float) $match[5] / ( $match[6] ? 100 / 255 : 1 ),
'a' => '' === $match[7] ? 1 : (float) $match[7] / ( $match[8] ? 100 : 1 ),
)
);
}

/**
* Clamps an array of HSLA values.
*
* Direct port of colord's clampHsla function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L6 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param array $hsla The HSLA array to clamp.
* @return array The clamped HSLA array.
*/
private static function colord_clamp_hsla( $hsla ) {
$hsla['h'] = self::colord_clamp_hue( $hsla['h'] );
$hsla['s'] = self::colord_clamp( $hsla['s'], 0, 100 );
$hsla['l'] = self::colord_clamp( $hsla['l'], 0, 100 );
$hsla['a'] = self::colord_clamp( $hsla['a'] );

return $hsla;
}

/**
* Converts an HSVA array to RGBA.
*
* Direct port of colord's hsvaToRgba function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsv.ts#L52 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param array $hsva The HSVA array to convert.
* @return array The RGBA array.
*/
private static function colord_hsva_to_rgba( $hsva ) {
$h = ( $hsva['h'] / 360 ) * 6;
$s = $hsva['s'] / 100;
$v = $hsva['v'] / 100;
$a = $hsva['a'];

$hh = floor( $h );
$b = $v * ( 1 - $s );
$c = $v * ( 1 - ( $h - $hh ) * $s );
$d = $v * ( 1 - ( 1 - $h + $hh ) * $s );
$module = $hh % 6;

return array(
'r' => array( $v, $c, $b, $b, $d, $v )[ $module ] * 255,
'g' => array( $d, $v, $v, $c, $b, $b )[ $module ] * 255,
'b' => array( $b, $b, $d, $v, $v, $c )[ $module ] * 255,
'a' => $a,
);
}

/**
* Converts an HSLA array to HSVA.
*
* Direct port of colord's hslaToHsva function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L33 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param array $hsla The HSLA array to convert.
* @return array The HSVA array.
*/
private static function colord_hsla_to_hsva( $hsla ) {
$h = $hsla['h'];
$s = $hsla['s'];
$l = $hsla['l'];
$a = $hsla['a'];

$s *= ( $l < 50 ? $l : 100 - $l ) / 100;

return array(
'h' => $h,
's' => $s > 0 ? ( ( 2 * $s ) / ( $l + $s ) ) * 100 : 0,
'v' => $l + $s,
'a' => $a,
);
}

/**
* Converts an HSLA array to RGBA.
*
* Direct port of colord's hslaToRgba function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L55 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param array $hsla The HSLA array to convert.
* @return array The RGBA array.
*/
private static function colord_hsla_to_rgba( $hsla ) {
return self::colord_hsva_to_rgba( self::colord_hsla_to_hsva( $hsla ) );
}

/**
* Parses a valid HSL[A] CSS color function/string.
*
* Direct port of colord's parseHslaString function.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hslString.ts#L17 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param string $input The HSLA string to parse.
* @return array|null An array of RGBA values or null if the RGB string is invalid.
*/
private static function colord_parse_hsla_string( $input ) {
// Functional syntax.
$is_match = preg_match(
'/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s*,\s*([+-]?\d*\.?\d+)%\s*,\s*([+-]?\d*\.?\d+)%\s*(?:,\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',
$input,
$match
);

if ( ! $is_match ) {
// Whitespace syntax.
$is_match = preg_match(
'/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s+([+-]?\d*\.?\d+)%\s+([+-]?\d*\.?\d+)%\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',
$input,
$match
);
}

if ( ! $is_match ) {
return null;
}

/*
* For some reason, preg_match doesn't include empty matches at the end
* of the array, so we add them manually to make things easier later.
*/
for ( $i = 1; $i <= 6; $i++ ) {
if ( ! isset( $match[ $i ] ) ) {
$match[ $i ] = '';
}
}

$hsla = self::colord_clamp_hsla(
array(
'h' => self::colord_parse_hue( $match[1], $match[2] ),
's' => (float) $match[3],
'l' => (float) $match[4],
'a' => '' === $match[5] ? 1 : (float) $match[5] / ( $match[6] ? 100 : 1 ),
)
);

return self::colord_hsla_to_rgba( $hsla );
}

/**
* Tries to convert an incoming string into RGBA values.
*
* Direct port of colord's parse function simplified for our use case. This
* version only supports string parsing and only returns RGBA values.
*
* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/parse.ts#L37 Sourced from colord.
*
* @internal
*
* @since 6.3.0
*
* @param string $input The string to parse.
* @return array|null An array of RGBA values or null if the string is invalid.
*/
private static function colord_parse( $input ) {
$result = self::colord_parse_hex( $input );

if ( ! $result ) {
$result = self::colord_parse_rgba_string( $input );
}

if ( ! $result ) {
$result = self::colord_parse_hsla_string( $input );
}

return $result;
}

/**
* Takes the inline CSS duotone variable from a block and return the slug.
*
* Handles styles slugs like:
* var:preset|duotone|blue-orange
* var(--wp--preset--duotone--blue-orange)
*
* @internal
*
* @since 6.3.0
*
* @param string $duotone_attr The duotone attribute from a block.
* @return string The slug of the duotone preset or an empty string if no slug is found.
*/
private static function get_slug_from_attribute( $duotone_attr ) {
// Uses Branch Reset Groups `(?|…)` to return one capture group.
preg_match( '/(?|var:preset\|duotone\|(\S+)|var\(--wp--preset--duotone--(\S+)\))/', $duotone_attr, $matches );

return ! empty( $matches[1] ) ? $matches[1] : '';
}

/**
* Checks if we have a valid duotone preset.
*
* Valid presets are defined in the $global_styles_presets array.
*
* @internal
*
* @since 6.3.0
*
* @param string $duotone_attr The duotone attribute from a block.
* @return bool True if the duotone preset present and valid.
*/
private static function is_preset( $duotone_attr ) {
$slug = self::get_slug_from_attribute( $duotone_attr );
$filter_id = self::get_filter_id( $slug );

return array_key_exists( $filter_id, self::get_all_global_styles_presets() );
}

/**
* Gets the CSS variable name for a duotone preset.
*
* Example output:
* --wp--preset--duotone--blue-orange
*
* @internal
*
* @since 6.3.0
*
* @param string $slug The slug of the duotone preset.
* @return string The CSS variable name.
*/
private static function get_css_custom_property_name( $slug ) {
return "--wp--preset--duotone--$slug";
}

/**
* Get the ID of the duotone filter.
*
* Example output:
* wp-duotone-blue-orange
*
* @internal
*
* @since 6.3.0
*
* @param string $slug The slug of the duotone preset.
* @return string The ID of the duotone filter.
*/
private static function get_filter_id( $slug ) {
return "wp-duotone-$slug";
}

/**
* Get the CSS variable for a duotone preset.
*
* Example output:
* var(--wp--preset--duotone--blue-orange)
*
* @internal
*
* @since 6.3.0
*
* @param string $slug The slug of the duotone preset.
* @return string The CSS variable.
*/
private static function get_css_var( $slug ) {
$name = self::get_css_custom_property_name( $slug );
return "var($name)";
}

/**
* Get the URL for a duotone filter.
*
* Example output:
* url(#wp-duotone-blue-orange)
*
* @internal
*
* @since 6.3.0
*
* @param string $filter_id The ID of the filter.
* @return string The URL for the duotone filter.
*/
private static function get_filter_url( $filter_id ) {
return "url(#$filter_id)";
}

/**
* Gets the SVG for the duotone filter definition.
*
* Whitespace is removed when SCRIPT_DEBUG is not enabled.
*
* @internal
*
* @since 6.3.0
*
* @param string $filter_id The ID of the filter.
* @param array $colors An array of color strings.
* @return string An SVG with a duotone filter definition.
*/
private static function get_filter_svg( $filter_id, $colors ) {
$duotone_values = array(
'r' => array(),
'g' => array(),
'b' => array(),
'a' => array(),
);

foreach ( $colors as $color_str ) {
$color = self::colord_parse( $color_str );

if ( null === $color ) {
$error_message = sprintf(
/* translators: 1: Duotone colors, 2: theme.json, 3: settings.color.duotone */
__( '"%1$s" in %2$s %3$s is not a hex or rgb string.' ),
$color_str,
'theme.json',
'settings.color.duotone'
);
_doing_it_wrong( __METHOD__, $error_message, '6.3.0' );
} else {
$duotone_values['r'][] = $color['r'] / 255;
$duotone_values['g'][] = $color['g'] / 255;
$duotone_values['b'][] = $color['b'] / 255;
$duotone_values['a'][] = $color['a'];
}
}

ob_start();

?>

<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 0 0"
width="0"
height="0"
focusable="false"
role="none"
style="visibility: hidden; position: absolute; left: -9999px; overflow: hidden;"
>
<defs>
<filter id="<?php echo esc_attr( $filter_id ); ?>">
<feColorMatrix
color-interpolation-filters="sRGB"
type="matrix"
values="
.299 .587 .114 0 0
.299 .587 .114 0 0
.299 .587 .114 0 0
.299 .587 .114 0 0
"
/>
<feComponentTransfer color-interpolation-filters="sRGB" >
<feFuncR type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['r'] ) ); ?>" />
<feFuncG type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['g'] ) ); ?>" />
<feFuncB type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['b'] ) ); ?>" />
<feFuncA type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['a'] ) ); ?>" />
</feComponentTransfer>
<feComposite in2="SourceGraphic" operator="in" />
</filter>
</defs>
</svg>

<?php

$svg = ob_get_clean();

if ( ! SCRIPT_DEBUG ) {
// Clean up the whitespace.
$svg = preg_replace( "/[\r\n\t ]+/", ' ', $svg );
$svg = str_replace( '> <', '><', $svg );
$svg = trim( $svg );
}

return $svg;
}

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

$filter_id = '';
if ( isset( $preset['slug'] ) ) {
$filter_id = self::get_filter_id( $preset['slug'] );
}
return $filter_id;
}

/**
* Gets the SVG for the duotone filter definition from a preset.
*
* Exported for the deprecated function wp_get_duotone_filter_property().
*
* @internal
*
* @since 6.3.0
* @deprecated 6.3.0
*
* @param array $preset The duotone preset.
* @return string The SVG for the filter definition.
*/
public static function get_filter_svg_from_preset( $preset ) {
_deprecated_function( __FUNCTION__, '6.3.0' );

$filter_id = self::get_filter_id_from_preset( $preset );
return self::get_filter_svg( $filter_id, $preset['colors'] );
}

/**
* Get the SVGs for the duotone filters.
*
* Example output:
* <svg><defs><filter id="wp-duotone-blue-orange">…</filter></defs></svg><svg>…</svg>
*
* @internal
*
* @since 6.3.0
*
* @param array $sources The duotone presets.
* @return string The SVGs for the duotone filters.
*/
private static function get_svg_definitions( $sources ) {
$svgs = '';
foreach ( $sources as $filter_id => $filter_data ) {
$colors = $filter_data['colors'];
$svgs .= self::get_filter_svg( $filter_id, $colors );
}
return $svgs;
}

/**
* Get the CSS for global styles.
*
* Example output:
* body{--wp--preset--duotone--blue-orange:url('#wp-duotone-blue-orange');}
*
* @internal
*
* @since 6.3.0
* @since 6.6.0 Replaced body selector with `WP_Theme_JSON::ROOT_CSS_PROPERTIES_SELECTOR`.
*
* @param array $sources The duotone presets.
* @return string The CSS for global styles.
*/
private static function get_global_styles_presets( $sources ) {
$css = WP_Theme_JSON::ROOT_CSS_PROPERTIES_SELECTOR . '{';
foreach ( $sources as $filter_id => $filter_data ) {
$slug = $filter_data['slug'];
$colors = $filter_data['colors'];
$css_property_name = self::get_css_custom_property_name( $slug );
$declaration_value = is_string( $colors ) ? $colors : self::get_filter_url( $filter_id );
$css .= "$css_property_name:$declaration_value;";
}
$css .= '}';
return $css;
}

/**
* Enqueue a block CSS declaration for the page.
*
* This does not include any SVGs.
*
* @internal
*
* @since 6.3.0
*
* @param string $filter_id The filter ID. e.g. 'wp-duotone-000000-ffffff-2'.
* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-000000-ffffff-2)' or 'unset'.
*/
private static function enqueue_block_css( $filter_id, $duotone_selector, $filter_value ) {
// Build the CSS selectors to which the filter will be applied.
$selectors = explode( ',', $duotone_selector );

$selectors_scoped = array();
foreach ( $selectors as $selector_part ) {
/*
* Assuming the selector part is a subclass selector (not a tag name)
* so we can prepend the filter id class. If we want to support elements
* such as `img` or namespaces, we'll need to add a case for that here.
*/
$selectors_scoped[] = '.' . $filter_id . trim( $selector_part );
}

$selector = implode( ', ', $selectors_scoped );

self::$block_css_declarations[] = array(
'selector' => $selector,
'declarations' => array(
'filter' => $filter_value,
),
);
}

/**
* Enqueue custom filter assets for the page.
*
* Includes an SVG filter and block CSS declaration.
*
* @internal
*
* @since 6.3.0
*
* @param string $filter_id The filter ID. e.g. 'wp-duotone-000000-ffffff-2'.
* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-000000-ffffff-2)' or 'unset'.
* @param array $filter_data Duotone filter data with 'slug' and 'colors' keys.
*/
private static function enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $filter_data ) {
self::$used_svg_filter_data[ $filter_id ] = $filter_data;
self::enqueue_block_css( $filter_id, $duotone_selector, $filter_value );
}

/**
* Enqueue preset assets for the page.
*
* Includes a CSS custom property, SVG filter, and block CSS declaration.
*
* @internal
*
* @since 6.3.0
*
* @param string $filter_id The filter ID. e.g. 'wp-duotone-blue-orange'.
* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-blue-orange)' or 'unset'.
*/
private static function enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value ) {
$global_styles_presets = self::get_all_global_styles_presets();
if ( ! array_key_exists( $filter_id, $global_styles_presets ) ) {
$error_message = sprintf(
/* translators: 1: Duotone filter ID, 2: theme.json */
__( 'The duotone id "%1$s" is not registered in %2$s settings' ),
$filter_id,
'theme.json'
);
_doing_it_wrong( __METHOD__, $error_message, '6.3.0' );
return;
}
self::$used_global_styles_presets[ $filter_id ] = $global_styles_presets[ $filter_id ];
self::enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $global_styles_presets[ $filter_id ] );
}

/**
* Registers the style and colors block attributes for block types that support it.
*
* Block support is added with `supports.filter.duotone` in block.json.
*
* @since 6.3.0
*
* @param WP_Block_Type $block_type Block Type.
*/
public static function register_duotone_support( $block_type ) {
/*
* Previous `color.__experimentalDuotone` support flag is migrated
* to `filter.duotone` via `block_type_metadata_settings` filter.
*/
if ( block_has_support( $block_type, array( 'filter', 'duotone' ), null ) ) {
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}

if ( ! array_key_exists( 'style', $block_type->attributes ) ) {
$block_type->attributes['style'] = array(
'type' => 'object',
);
}
}
}

/**
* Get the CSS selector for a block type.
*
* This handles selectors defined in `color.__experimentalDuotone` support
* if `filter.duotone` support is not defined.
*
* @internal
* @since 6.3.0
*
* @param WP_Block_Type $block_type Block type to check for support.
* @return string|null The CSS selector or null if there is no support.
*/
private static function get_selector( $block_type ) {
if ( ! ( $block_type instanceof WP_Block_Type ) ) {
return null;
}

/*
* Backward compatibility with `supports.color.__experimentalDuotone`
* is provided via the `block_type_metadata_settings` filter. If
* `supports.filter.duotone` has not been set and the experimental
* property has been, the experimental property value is copied into
* `supports.filter.duotone`.
*/
$duotone_support = block_has_support( $block_type, array( 'filter', 'duotone' ) );
if ( ! $duotone_support ) {
return null;
}

/*
* If the experimental duotone support was set, that value is to be
* treated as a selector and requires scoping.
*/
$experimental_duotone = isset( $block_type->supports['color']['__experimentalDuotone'] )
? $block_type->supports['color']['__experimentalDuotone']
: false;
if ( $experimental_duotone ) {
$root_selector = wp_get_block_css_selector( $block_type );
return is_string( $experimental_duotone )
? WP_Theme_JSON::scope_selector( $root_selector, $experimental_duotone )
: $root_selector;
}

// Regular filter.duotone support uses filter.duotone selectors with fallbacks.
return wp_get_block_css_selector( $block_type, array( 'filter', 'duotone' ), true );
}

/**
* Scrape all possible duotone presets from global and theme styles and
* store them in self::$global_styles_presets.
*
* Used in conjunction with self::render_duotone_support for blocks that
* use duotone preset filters.
*
* @since 6.3.0
*
* @return array An array of global styles presets, keyed on the filter ID.
*/
private static function get_all_global_styles_presets() {
if ( isset( self::$global_styles_presets ) ) {
return self::$global_styles_presets;
}
// Get the per block settings from the theme.json.
$tree = wp_get_global_settings();
$presets_by_origin = isset( $tree['color']['duotone'] ) ? $tree['color']['duotone'] : array();

self::$global_styles_presets = array();
foreach ( $presets_by_origin as $presets ) {
foreach ( $presets as $preset ) {
$filter_id = self::get_filter_id( _wp_to_kebab_case( $preset['slug'] ) );

self::$global_styles_presets[ $filter_id ] = $preset;
}
}

return self::$global_styles_presets;
}

/**
* Scrape all block names from global styles and store in self::$global_styles_block_names.
*
* Used in conjunction with self::render_duotone_support to output the
* duotone filters defined in the theme.json global styles.
*
* @since 6.3.0
*
* @return string[] An array of global style block slugs, keyed on the block name.
*/
private static function get_all_global_style_block_names() {
if ( isset( self::$global_styles_block_names ) ) {
return self::$global_styles_block_names;
}
// Get the per block settings from the theme.json.
$tree = WP_Theme_JSON_Resolver::get_merged_data();
$block_nodes = $tree->get_styles_block_nodes();
$theme_json = $tree->get_raw_data();

self::$global_styles_block_names = array();

foreach ( $block_nodes as $block_node ) {
// This block definition doesn't include any duotone settings. Skip it.
if ( empty( $block_node['duotone'] ) ) {
continue;
}

// Value looks like this: 'var(--wp--preset--duotone--blue-orange)' or 'var:preset|duotone|blue-orange'.
$duotone_attr_path = array_merge( $block_node['path'], array( 'filter', 'duotone' ) );
$duotone_attr = _wp_array_get( $theme_json, $duotone_attr_path, array() );

if ( empty( $duotone_attr ) ) {
continue;
}
// If it has a duotone filter preset, save the block name and the preset slug.
$slug = self::get_slug_from_attribute( $duotone_attr );

if ( $slug && $slug !== $duotone_attr ) {
self::$global_styles_block_names[ $block_node['name'] ] = $slug;
}
}
return self::$global_styles_block_names;
}

/**
* Render out the duotone CSS styles and SVG.
*
* The hooks self::set_global_style_block_names and self::set_global_styles_presets
* must be called before this function.
*
* @since 6.3.0
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @param WP_Block $wp_block The block instance.
* @return string Filtered block content.
*/
public static function render_duotone_support( $block_content, $block, $wp_block ) {
if ( ! $block['blockName'] ) {
return $block_content;
}
$duotone_selector = self::get_selector( $wp_block->block_type );

if ( ! $duotone_selector ) {
return $block_content;
}

$global_styles_block_names = self::get_all_global_style_block_names();

// The block should have a duotone attribute or have duotone defined in its theme.json to be processed.
$has_duotone_attribute = isset( $block['attrs']['style']['color']['duotone'] );
$has_global_styles_duotone = array_key_exists( $block['blockName'], $global_styles_block_names );

if ( ! $has_duotone_attribute && ! $has_global_styles_duotone ) {
return $block_content;
}

// Generate the pieces needed for rendering a duotone to the page.
if ( $has_duotone_attribute ) {

/*
* Possible values for duotone attribute:
* 1. Array of colors - e.g. array('#000000', '#ffffff').
* 2. Variable for an existing Duotone preset - e.g. 'var:preset|duotone|blue-orange' or 'var(--wp--preset--duotone--blue-orange)''
* 3. A CSS string - e.g. 'unset' to remove globally applied duotone.
*/

$duotone_attr = $block['attrs']['style']['color']['duotone'];
$is_preset = is_string( $duotone_attr ) && self::is_preset( $duotone_attr );
$is_css = is_string( $duotone_attr ) && ! $is_preset;
$is_custom = is_array( $duotone_attr );

if ( $is_preset ) {

$slug = self::get_slug_from_attribute( $duotone_attr ); // e.g. 'blue-orange'.
$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-blue-orange'.
$filter_value = self::get_css_var( $slug ); // e.g. 'var(--wp--preset--duotone--blue-orange)'.

// CSS custom property, SVG filter, and block CSS.
self::enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value );

} elseif ( $is_css ) {
$slug = wp_unique_id( sanitize_key( $duotone_attr . '-' ) ); // e.g. 'unset-1'.
$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-unset-1'.
$filter_value = $duotone_attr; // e.g. 'unset'.

// Just block CSS.
self::enqueue_block_css( $filter_id, $duotone_selector, $filter_value );
} elseif ( $is_custom ) {
$slug = wp_unique_id( sanitize_key( implode( '-', $duotone_attr ) . '-' ) ); // e.g. '000000-ffffff-2'.
$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-000000-ffffff-2'.
$filter_value = self::get_filter_url( $filter_id ); // e.g. 'url(#wp-duotone-filter-000000-ffffff-2)'.
$filter_data = array(
'slug' => $slug,
'colors' => $duotone_attr,
);

// SVG filter and block CSS.
self::enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $filter_data );
}
} elseif ( $has_global_styles_duotone ) {
$slug = $global_styles_block_names[ $block['blockName'] ]; // e.g. 'blue-orange'.
$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-blue-orange'.
$filter_value = self::get_css_var( $slug ); // e.g. 'var(--wp--preset--duotone--blue-orange)'.

// CSS custom property, SVG filter, and block CSS.
self::enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value );
}

// Like the layout hook, this assumes the hook only applies to blocks with a single wrapper.
$tags = new WP_HTML_Tag_Processor( $block_content );
if ( $tags->next_tag() ) {
$tags->add_class( $filter_id );
}
return $tags->get_updated_html();
}

/**
* Fixes the issue with our generated class name not being added to the block's outer container
* in classic themes due to gutenberg_restore_image_outer_container from layout block supports.
*
* @since 6.6.0
*
* @param string $block_content Rendered block content.
* @return string Filtered block content.
*/
public static function restore_image_outer_container( $block_content ) {
if ( wp_theme_has_theme_json() ) {
return $block_content;
}

$tags = new WP_HTML_Tag_Processor( $block_content );
$wrapper_query = array(
'tag_name' => 'div',
'class_name' => 'wp-block-image',
);
if ( ! $tags->next_tag( $wrapper_query ) ) {
return $block_content;
}

$tags->set_bookmark( 'wrapper-div' );
$tags->next_tag();

$inner_classnames = explode( ' ', $tags->get_attribute( 'class' ) );
foreach ( $inner_classnames as $classname ) {
if ( 0 === strpos( $classname, 'wp-duotone' ) ) {
$tags->remove_class( $classname );
$tags->seek( 'wrapper-div' );
$tags->add_class( $classname );
break;
}
}

return $tags->get_updated_html();
}

/**
* Appends the used block duotone filter declarations to the inline block supports CSS.
*
* Uses the declarations saved in earlier calls to self::enqueue_block_css.
*
* @since 6.3.0
*/
public static function output_block_styles() {
if ( ! empty( self::$block_css_declarations ) ) {
wp_style_engine_get_stylesheet_from_css_rules(
self::$block_css_declarations,
array(
'context' => 'block-supports',
)
);
}
}

/**
* Appends the used global style duotone filter presets (CSS custom
* properties) to the inline global styles CSS.
*
* Uses the declarations saved in earlier calls to self::enqueue_global_styles_preset.
*
* @since 6.3.0
*/
public static function output_global_styles() {
if ( ! empty( self::$used_global_styles_presets ) ) {
wp_add_inline_style( 'global-styles', self::get_global_styles_presets( self::$used_global_styles_presets ) );
}
}

/**
* Outputs all necessary SVG for duotone filters, CSS for classic themes.
*
* Uses the declarations saved in earlier calls to self::enqueue_global_styles_preset
* and self::enqueue_custom_filter.
*
* @since 6.3.0
*/
public static function output_footer_assets() {
if ( ! empty( self::$used_svg_filter_data ) ) {
echo self::get_svg_definitions( self::$used_svg_filter_data );
}

// In block themes, the CSS is added in the head via wp_add_inline_style in the wp_enqueue_scripts action.
if ( ! wp_is_block_theme() ) {
$style_tag_id = 'core-block-supports-duotone';
wp_register_style( $style_tag_id, false );
if ( ! empty( self::$used_global_styles_presets ) ) {
wp_add_inline_style( $style_tag_id, self::get_global_styles_presets( self::$used_global_styles_presets ) );
}
if ( ! empty( self::$block_css_declarations ) ) {
wp_add_inline_style( $style_tag_id, wp_style_engine_get_stylesheet_from_css_rules( self::$block_css_declarations ) );
}
wp_enqueue_style( $style_tag_id );
}
}

/**
* Adds the duotone SVGs and CSS custom properties to the editor settings.
*
* This allows the properties to be pulled in by the EditorStyles component
* in JS and rendered in the post editor.
*
* @since 6.3.0
*
* @param array $settings The block editor settings from the `block_editor_settings_all` filter.
* @return array The editor settings with duotone SVGs and CSS custom properties.
*/
public static function add_editor_settings( $settings ) {
$global_styles_presets = self::get_all_global_styles_presets();
if ( ! empty( $global_styles_presets ) ) {
if ( ! isset( $settings['styles'] ) ) {
$settings['styles'] = array();
}

$settings['styles'][] = array(
// For the editor we can add all of the presets by default.
'assets' => self::get_svg_definitions( $global_styles_presets ),
// The 'svgs' type is new in 6.3 and requires the corresponding JS changes in the EditorStyles component to work.
'__unstableType' => 'svgs',
// These styles not generated by global styles, so this must be false or they will be stripped out in wp_get_block_editor_settings.
'isGlobalStyles' => false,
);

$settings['styles'][] = array(
// For the editor we can add all of the presets by default.
'css' => self::get_global_styles_presets( $global_styles_presets ),
// This must be set and must be something other than 'theme' or they will be stripped out in the post editor <Editor> component.
'__unstableType' => 'presets',
// These styles are no longer generated by global styles, so this must be false or they will be stripped out in wp_get_block_editor_settings.
'isGlobalStyles' => false,
);
}

return $settings;
}

/**
* Migrates the experimental duotone support flag to the stabilized location.
*
* This moves `supports.color.__experimentalDuotone` to `supports.filter.duotone`.
*
* @since 6.3.0
*
* @param array $settings Current block type settings.
* @param array $metadata Block metadata as read in via block.json.
* @return array Filtered block type settings.
*/
public static function migrate_experimental_duotone_support_flag( $settings, $metadata ) {
$duotone_support = isset( $metadata['supports']['color']['__experimentalDuotone'] )
? $metadata['supports']['color']['__experimentalDuotone']
: null;

if ( ! isset( $settings['supports']['filter']['duotone'] ) && null !== $duotone_support ) {
_wp_array_set( $settings, array( 'supports', 'filter', 'duotone' ), (bool) $duotone_support );
}

return $settings;
}

/**
* Gets the CSS filter property value from a preset.
*
* Exported for the deprecated function wp_get_duotone_filter_id().
*
* @internal
*
* @since 6.3.0
* @deprecated 6.3.0
*
* @param array $preset The duotone preset.
* @return string The CSS filter property value.
*/
public static function get_filter_css_property_value_from_preset( $preset ) {
_deprecated_function( __FUNCTION__, '6.3.0' );

if ( isset( $preset['colors'] ) && is_string( $preset['colors'] ) ) {
return $preset['colors'];
}

$filter_id = self::get_filter_id_from_preset( $preset );

return 'url(#' . $filter_id . ')';
}
}