<?php

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/**

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* WP_Duotone class

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*

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* Parts of this source were derived and modified from colord,

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* released under the MIT license.

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*

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* https://github.com/omgovich/colord

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*

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* Copyright (c) 2020 Vlad Shilov omgovich@ya.ru

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*

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* Permission is hereby granted, free of charge, to any person obtaining

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* a copy of this software and associated documentation files (the

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* "Software"), to deal in the Software without restriction, including

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* without limitation the rights to use, copy, modify, merge, publish,

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* distribute, sublicense, and/or sell copies of the Software, and to

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* permit persons to whom the Software is furnished to do so, subject to

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* the following conditions:

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*

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* The above copyright notice and this permission notice shall be

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* included in all copies or substantial portions of the Software.

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*

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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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*

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* @package WordPress

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* @since 6.3.0

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*/

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/**

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* Manages duotone block supports and global styles.

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*

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* @access private

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*/

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class WP_Duotone {

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/**

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* Block names from global, theme, and custom styles that use duotone presets and the slug of

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* the preset they are using.

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*

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* Example:

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* [

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* 'core/featured-image' => 'blue-orange',

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* …

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* ]

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @var array

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*/

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private static $global_styles_block_names;

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/**

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* An array of duotone filter data from global, theme, and custom presets.

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*

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* Example:

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* [

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* 'wp-duotone-blue-orange' => [

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* 'slug' => 'blue-orange',

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* 'colors' => [ '#0000ff', '#ffcc00' ],

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* ],

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* 'wp-duotone-red-yellow' => [

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* 'slug' => 'red-yellow',

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* 'colors' => [ '#cc0000', '#ffff33' ],

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* ],

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* …

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* ]

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @var array

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*/

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private static $global_styles_presets;

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/**

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* All of the duotone filter data from presets for CSS custom properties on

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* the page.

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*

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* Example:

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* [

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* 'wp-duotone-blue-orange' => [

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* 'slug' => 'blue-orange',

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* 'colors' => [ '#0000ff', '#ffcc00' ],

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* ],

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* …

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* ]

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @var array

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*/

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private static $used_global_styles_presets = array();

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/**

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* All of the duotone filter data for SVGs on the page. Includes both

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* presets and custom filters.

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*

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* Example:

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* [

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* 'wp-duotone-blue-orange' => [

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* 'slug' => 'blue-orange',

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* 'colors' => [ '#0000ff', '#ffcc00' ],

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* ],

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* 'wp-duotone-000000-ffffff-2' => [

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* 'slug' => '000000-ffffff-2',

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* 'colors' => [ '#000000', '#ffffff' ],

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* ],

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* …

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* ]

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @var array

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*/

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private static $used_svg_filter_data = array();

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/**

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* All of the block CSS declarations for styles on the page.

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*

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* Example:

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* [

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* [

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* 'selector' => '.wp-duotone-000000-ffffff-2.wp-block-image img',

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* 'declarations' => [

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* 'filter' => 'url(#wp-duotone-000000-ffffff-2)',

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* ],

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* ],

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* …

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* ]

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @var array

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*/

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private static $block_css_declarations = array();

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/**

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* Clamps a value between an upper and lower bound.

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*

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* Direct port of colord's clamp function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L23 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param float $number The number to clamp.

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* @param float $min The minimum value.

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* @param float $max The maximum value.

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* @return float The clamped value.

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*/

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private static function colord_clamp( $number, $min = 0, $max = 1 ) {

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return $number > $max ? $max : ( $number > $min ? $number : $min );

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}

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/**

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* Processes and clamps a degree (angle) value properly.

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*

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* Direct port of colord's clampHue function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L32 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param float $degrees The hue to clamp.

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* @return float The clamped hue.

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*/

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private static function colord_clamp_hue( $degrees ) {

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$degrees = is_finite( $degrees ) ? $degrees % 360 : 0;

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return $degrees > 0 ? $degrees : $degrees + 360;

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}

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/**

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* Converts a hue value to degrees from 0 to 360 inclusive.

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*

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* Direct port of colord's parseHue function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L40 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param float $value The hue value to parse.

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* @param string $unit The unit of the hue value.

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* @return float The parsed hue value.

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*/

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private static function colord_parse_hue( $value, $unit = 'deg' ) {

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$angle_units = array(

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'grad' => 360 / 400,

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'turn' => 360,

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'rad' => 360 / ( M_PI * 2 ),

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);

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

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return (float) $value * $factor;

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}

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/**

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* Parses any valid Hex3, Hex4, Hex6 or Hex8 string and converts it to an RGBA object.

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*

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* Direct port of colord's parseHex function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hex.ts#L8 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param string $hex The hex string to parse.

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* @return array|null An array of RGBA values or null if the hex string is invalid.

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*/

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private static function colord_parse_hex( $hex ) {

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$is_match = preg_match(

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'/^#([0-9a-f]{3,8})$/i',

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$hex,

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$hex_match

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);

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if ( ! $is_match ) {

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return null;

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}

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$hex = $hex_match[1];

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if ( 4 >= strlen( $hex ) ) {

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return array(

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'r' => (int) base_convert( $hex[0] . $hex[0], 16, 10 ),

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'g' => (int) base_convert( $hex[1] . $hex[1], 16, 10 ),

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'b' => (int) base_convert( $hex[2] . $hex[2], 16, 10 ),

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'a' => 4 === strlen( $hex ) ? round( base_convert( $hex[3] . $hex[3], 16, 10 ) / 255, 2 ) : 1,

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);

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}

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if ( 6 === strlen( $hex ) || 8 === strlen( $hex ) ) {

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return array(

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'r' => (int) base_convert( substr( $hex, 0, 2 ), 16, 10 ),

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'g' => (int) base_convert( substr( $hex, 2, 2 ), 16, 10 ),

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'b' => (int) base_convert( substr( $hex, 4, 2 ), 16, 10 ),

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'a' => 8 === strlen( $hex ) ? round( (int) base_convert( substr( $hex, 6, 2 ), 16, 10 ) / 255, 2 ) : 1,

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);

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}

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return null;

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}

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/**

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* Clamps an array of RGBA values.

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*

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* Direct port of colord's clampRgba function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgb.ts#L5 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param array $rgba The RGBA array to clamp.

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* @return array The clamped RGBA array.

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*/

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private static function colord_clamp_rgba( $rgba ) {

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$rgba['r'] = self::colord_clamp( $rgba['r'], 0, 255 );

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$rgba['g'] = self::colord_clamp( $rgba['g'], 0, 255 );

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$rgba['b'] = self::colord_clamp( $rgba['b'], 0, 255 );

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$rgba['a'] = self::colord_clamp( $rgba['a'] );

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return $rgba;

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}

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/**

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* Parses a valid RGB[A] CSS color function/string.

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*

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* Direct port of colord's parseRgbaString function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgbString.ts#L18 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param string $input The RGBA string to parse.

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* @return array|null An array of RGBA values or null if the RGB string is invalid.

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*/

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private static function colord_parse_rgba_string( $input ) {

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// Functional syntax.

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$is_match = preg_match(

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'/^rgba?\(\s*([+-]?\d*\.?\d+)(%)?\s*,\s*([+-]?\d*\.?\d+)(%)?\s*,\s*([+-]?\d*\.?\d+)(%)?\s*(?:,\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',

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$input,

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$match

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);

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if ( ! $is_match ) {

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// Whitespace syntax.

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$is_match = preg_match(

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'/^rgba?\(\s*([+-]?\d*\.?\d+)(%)?\s+([+-]?\d*\.?\d+)(%)?\s+([+-]?\d*\.?\d+)(%)?\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',

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$input,

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$match

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);

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}

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if ( ! $is_match ) {

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return null;

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}

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/*

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* For some reason, preg_match doesn't include empty matches at the end

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* of the array, so we add them manually to make things easier later.

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*/

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for ( $i = 1; $i <= 8; $i++ ) {

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if ( ! isset( $match[ $i ] ) ) {

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$match[ $i ] = '';

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}

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}

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if ( $match[2] !== $match[4] || $match[4] !== $match[6] ) {

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return null;

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}

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return self::colord_clamp_rgba(

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array(

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'r' => (float) $match[1] / ( $match[2] ? 100 / 255 : 1 ),

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'g' => (float) $match[3] / ( $match[4] ? 100 / 255 : 1 ),

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'b' => (float) $match[5] / ( $match[6] ? 100 / 255 : 1 ),

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'a' => '' === $match[7] ? 1 : (float) $match[7] / ( $match[8] ? 100 : 1 ),

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)

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);

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}

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/**

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* Clamps an array of HSLA values.

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*

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* Direct port of colord's clampHsla function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L6 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param array $hsla The HSLA array to clamp.

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* @return array The clamped HSLA array.

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*/

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private static function colord_clamp_hsla( $hsla ) {

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$hsla['h'] = self::colord_clamp_hue( $hsla['h'] );

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$hsla['s'] = self::colord_clamp( $hsla['s'], 0, 100 );

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$hsla['l'] = self::colord_clamp( $hsla['l'], 0, 100 );

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$hsla['a'] = self::colord_clamp( $hsla['a'] );

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return $hsla;

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}

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/**

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* Converts an HSVA array to RGBA.

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*

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* Direct port of colord's hsvaToRgba function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsv.ts#L52 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param array $hsva The HSVA array to convert.

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* @return array The RGBA array.

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*/

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private static function colord_hsva_to_rgba( $hsva ) {

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$h = ( $hsva['h'] / 360 ) * 6;

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$s = $hsva['s'] / 100;

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$v = $hsva['v'] / 100;

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$a = $hsva['a'];

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$hh = floor( $h );

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$b = $v * ( 1 - $s );

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$c = $v * ( 1 - ( $h - $hh ) * $s );

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$d = $v * ( 1 - ( 1 - $h + $hh ) * $s );

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$module = $hh % 6;

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return array(

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'r' => array( $v, $c, $b, $b, $d, $v )[ $module ] * 255,

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'g' => array( $d, $v, $v, $c, $b, $b )[ $module ] * 255,

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'b' => array( $b, $b, $d, $v, $v, $c )[ $module ] * 255,

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'a' => $a,

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);

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}

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/**

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* Converts an HSLA array to HSVA.

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*

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* Direct port of colord's hslaToHsva function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L33 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param array $hsla The HSLA array to convert.

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* @return array The HSVA array.

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*/

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private static function colord_hsla_to_hsva( $hsla ) {

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$h = $hsla['h'];

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$s = $hsla['s'];

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$l = $hsla['l'];

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$a = $hsla['a'];

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

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return array(

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'h' => $h,

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's' => $s > 0 ? ( ( 2 * $s ) / ( $l + $s ) ) * 100 : 0,

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'v' => $l + $s,

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'a' => $a,

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);

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}

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/**

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* Converts an HSLA array to RGBA.

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*

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* Direct port of colord's hslaToRgba function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L55 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param array $hsla The HSLA array to convert.

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* @return array The RGBA array.

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*/

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private static function colord_hsla_to_rgba( $hsla ) {

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return self::colord_hsva_to_rgba( self::colord_hsla_to_hsva( $hsla ) );

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}

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/**

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* Parses a valid HSL[A] CSS color function/string.

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*

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* Direct port of colord's parseHslaString function.

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*

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* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hslString.ts#L17 Sourced from colord.

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*

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* @internal

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*

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* @since 6.3.0

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*

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* @param string $input The HSLA string to parse.

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* @return array|null An array of RGBA values or null if the RGB string is invalid.

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*/

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private static function colord_parse_hsla_string( $input ) {

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// Functional syntax.

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$is_match = preg_match(

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'/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s*,\s*([+-]?\d*\.?\d+)%\s*,\s*([+-]?\d*\.?\d+)%\s*(?:,\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',

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$input,

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$match

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);

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if ( ! $is_match ) {

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// Whitespace syntax.

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$is_match = preg_match(

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'/^hsla?\(\s*([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s+([+-]?\d*\.?\d+)%\s+([+-]?\d*\.?\d+)%\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i',

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$input,

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$match

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);

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}

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if ( ! $is_match ) {

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return null;

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}

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/*

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* For some reason, preg_match doesn't include empty matches at the end

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* of the array, so we add them manually to make things easier later.

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*/

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for ( $i = 1; $i <= 6; $i++ ) {

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if ( ! isset( $match[ $i ] ) ) {

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$match[ $i ] = '';

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}

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}

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$hsla = self::colord_clamp_hsla(

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array(

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'h' => self::colord_parse_hue( $match[1], $match[2] ),

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's' => (float) $match[3],

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