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<?php
/**
* Duotone block support flag.
*
* Parts of this source were derived and modified from TinyColor,
* released under the MIT license.
*
* https://github.com/bgrins/TinyColor
*
* Copyright (c), Brian Grinstead, http://briangrinstead.com
*
* 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 5.8.0
*/
/**
* Takes input from [0, n] and returns it as [0, 1].
*
* Direct port of TinyColor's function, lightly simplified to maintain
* consistency with TinyColor.
*
* @see https://github.com/bgrins/TinyColor
*
* @since 5.8.0
* @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 ) {
if ( 'string' === gettype( $n ) && false !== strpos( $n, '.' ) && 1 === (float) $n ) {
$n = '100%';
}
$n = min( $max, max( 0, (float) $n ) );
// Automatically convert percentage into number.
if ( 'string' === gettype( $n ) && false !== strpos( $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.
*
* @see https://github.com/bgrins/TinyColor
*
* @since 5.9.0
* @access private
*
* @param mixed $n Number of unknown type.
* @return float Value in the range [0,1].
*/
function _wp_tinycolor_bound_alpha( $n ) {
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.
*
* @see https://github.com/bgrins/TinyColor
*
* @since 5.8.0
* @access private
*
* @param array $rgb_color RGB object.
* @return array Rounded and converted RGB object.
*/
function wp_tinycolor_rgb_to_rgb( $rgb_color ) {
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.
*
* @see https://github.com/bgrins/TinyColor
*
* @since 5.8.0
* @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 ) {
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.
*
* @see https://github.com/bgrins/TinyColor
*
* @since 5.8.0
* @access private
*
* @param array $hsl_color HSL object.
* @return array Rounded and converted RGB object.
*/
function wp_tinycolor_hsl_to_rgb( $hsl_color ) {
$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.
*
* @see https://github.com/bgrins/TinyColor
* @see https://github.com/casesandberg/react-color/
*
* @since 5.8.0
* @since 5.9.0 Added alpha processing.
* @access private
*
* @param string $color_str CSS color string.
* @return array RGB object.
*/
function wp_tinycolor_string_to_rgb( $color_str ) {
$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
* @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 ) {
if ( ! isset( $preset['slug'] ) ) {
return '';
}
return 'wp-duotone-' . $preset['slug'];
}
/**
* Returns the CSS filter property url to reference the rendered SVG.
*
* @since 5.9.0
* @since 6.1.0 Allow unset for preset colors.
* @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 ) {
if ( isset( $preset['colors'] ) && 'unset' === $preset['colors'] ) {
return 'none';
}
$filter_id = wp_get_duotone_filter_id( $preset );
return "url('#" . $filter_id . "')";
}
/**
* Returns the duotone filter SVG string for the preset.
*
* @since 5.9.1
* @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 ) {
$filter_id = wp_get_duotone_filter_id( $preset );
$duotone_values = array(
'r' => array(),
'g' => array(),
'b' => array(),
'a' => array(),
);
if ( ! isset( $preset['colors'] ) || ! is_array( $preset['colors'] ) ) {
$preset['colors'] = array();
}
foreach ( $preset['colors'] as $color_str ) {
$color = wp_tinycolor_string_to_rgb( $color_str );
$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;
}
/**
* Registers the style and colors block attributes for block types that support it.
*
* @since 5.8.0
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_duotone_support( $block_type ) {
$has_duotone_support = false;
if ( property_exists( $block_type, 'supports' ) ) {
$has_duotone_support = _wp_array_get( $block_type->supports, array( 'color', '__experimentalDuotone' ), false );
}
if ( $has_duotone_support ) {
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}
if ( ! array_key_exists( 'style', $block_type->attributes ) ) {
$block_type->attributes['style'] = array(
'type' => 'object',
);
}
}
}
/**
* Renders out the duotone stylesheet and SVG.
*
* @since 5.8.0
* @since 6.1.0 Allow unset for preset colors.
* @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 ) {
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
$duotone_support = false;
if ( $block_type && property_exists( $block_type, 'supports' ) ) {
$duotone_support = _wp_array_get( $block_type->supports, array( 'color', '__experimentalDuotone' ), false );
}
$has_duotone_attribute = isset( $block['attrs']['style']['color']['duotone'] );
if (
! $duotone_support ||
! $has_duotone_attribute
) {
return $block_content;
}
$colors = $block['attrs']['style']['color']['duotone'];
$filter_key = is_array( $colors ) ? implode( '-', $colors ) : $colors;
$filter_preset = array(
'slug' => wp_unique_id( sanitize_key( $filter_key . '-' ) ),
'colors' => $colors,
);
$filter_property = wp_get_duotone_filter_property( $filter_preset );
$filter_id = wp_get_duotone_filter_id( $filter_preset );
$scope = '.' . $filter_id;
$selectors = explode( ',', $duotone_support );
$scoped = array();
foreach ( $selectors as $sel ) {
$scoped[] = $scope . ' ' . trim( $sel );
}
$selector = implode( ', ', $scoped );
// !important is needed because these styles render before global styles,
// and they should be overriding the duotone filters set by global styles.
$filter_style = SCRIPT_DEBUG
? $selector . " {\n\tfilter: " . $filter_property . " !important;\n}\n"
: $selector . '{filter:' . $filter_property . ' !important;}';
wp_register_style( $filter_id, false );
wp_add_inline_style( $filter_id, $filter_style );
wp_enqueue_style( $filter_id );
if ( 'unset' !== $colors ) {
$filter_svg = wp_get_duotone_filter_svg( $filter_preset );
add_action(
'wp_footer',
static function () use ( $filter_svg, $selector ) {
echo $filter_svg;
/*
* Safari renders elements incorrectly on first paint when the
* SVG filter comes after the content that it is filtering, so
* we force a repaint with a WebKit hack which solves the issue.
*/
global $is_safari;
if ( $is_safari ) {
/*
* Simply accessing el.offsetHeight flushes layout and style
* changes in WebKit without having to wait for setTimeout.
*/
printf(
'<script>( function() { var el = document.querySelector( %s ); var display = el.style.display; el.style.display = "none"; el.offsetHeight; el.style.display = display; } )();</script>',
wp_json_encode( $selector )
);
}
}
);
}
// Like the layout hook, this assumes the hook only applies to blocks with a single wrapper.
return preg_replace(
'/' . preg_quote( 'class="', '/' ) . '/',
'class="' . $filter_id . ' ',
$block_content,
1
);
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'duotone',
array(
'register_attribute' => 'wp_register_duotone_support',
)
);
add_filter( 'render_block', 'wp_render_duotone_support', 10, 2 );