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<?php
/**
* Colors block support flag.
*
* @package WordPress
* @since 5.6.0
*/
/**
* Registers the style and colors block attributes for block types that support it.
*
* @since 5.6.0
* @since 6.1.0 Improved $color_support assignment optimization.
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_colors_support( $block_type ) {
$color_support = false;
if ( $block_type instanceof WP_Block_Type ) {
$color_support = isset( $block_type->supports['color'] ) ? $block_type->supports['color'] : false;
}
$has_text_colors_support = true === $color_support ||
( isset( $color_support['text'] ) && $color_support['text'] ) ||
( is_array( $color_support ) && ! isset( $color_support['text'] ) );
$has_background_colors_support = true === $color_support ||
( isset( $color_support['background'] ) && $color_support['background'] ) ||
( is_array( $color_support ) && ! isset( $color_support['background'] ) );
$has_gradients_support = isset( $color_support['gradients'] ) ? $color_support['gradients'] : false;
$has_link_colors_support = isset( $color_support['link'] ) ? $color_support['link'] : false;
$has_button_colors_support = isset( $color_support['button'] ) ? $color_support['button'] : false;
$has_heading_colors_support = isset( $color_support['heading'] ) ? $color_support['heading'] : false;
$has_color_support = $has_text_colors_support ||
$has_background_colors_support ||
$has_gradients_support ||
$has_link_colors_support ||
$has_button_colors_support ||
$has_heading_colors_support;
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}
if ( $has_color_support && ! array_key_exists( 'style', $block_type->attributes ) ) {
$block_type->attributes['style'] = array(
'type' => 'object',
);
}
if ( $has_background_colors_support && ! array_key_exists( 'backgroundColor', $block_type->attributes ) ) {
$block_type->attributes['backgroundColor'] = array(
'type' => 'string',
);
}
if ( $has_text_colors_support && ! array_key_exists( 'textColor', $block_type->attributes ) ) {
$block_type->attributes['textColor'] = array(
'type' => 'string',
);
}
if ( $has_gradients_support && ! array_key_exists( 'gradient', $block_type->attributes ) ) {
$block_type->attributes['gradient'] = array(
'type' => 'string',
);
}
}
/**
* Adds CSS classes and inline styles for colors to the incoming attributes array.
* This will be applied to the block markup in the front-end.
*
* @since 5.6.0
* @since 6.1.0 Implemented the style engine to generate CSS and classnames.
* @access private
*
* @param WP_Block_Type $block_type Block type.
* @param array $block_attributes Block attributes.
*
* @return array Colors CSS classes and inline styles.
*/
function wp_apply_colors_support( $block_type, $block_attributes ) {
$color_support = isset( $block_type->supports['color'] ) ? $block_type->supports['color'] : false;
if (
is_array( $color_support ) &&
wp_should_skip_block_supports_serialization( $block_type, 'color' )
) {
return array();
}
$has_text_colors_support = true === $color_support ||
( isset( $color_support['text'] ) && $color_support['text'] ) ||
( is_array( $color_support ) && ! isset( $color_support['text'] ) );
$has_background_colors_support = true === $color_support ||
( isset( $color_support['background'] ) && $color_support['background'] ) ||
( is_array( $color_support ) && ! isset( $color_support['background'] ) );
$has_gradients_support = isset( $color_support['gradients'] ) ? $color_support['gradients'] : false;
$color_block_styles = array();
// Text colors.
if ( $has_text_colors_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'text' ) ) {
$preset_text_color = array_key_exists( 'textColor', $block_attributes ) ? "var:preset|color|{$block_attributes['textColor']}" : null;
$custom_text_color = isset( $block_attributes['style']['color']['text'] ) ? $block_attributes['style']['color']['text'] : null;
$color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;
}
// Background colors.
if ( $has_background_colors_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'background' ) ) {
$preset_background_color = array_key_exists( 'backgroundColor', $block_attributes ) ? "var:preset|color|{$block_attributes['backgroundColor']}" : null;
$custom_background_color = isset( $block_attributes['style']['color']['background'] ) ? $block_attributes['style']['color']['background'] : null;
$color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;
}
// Gradients.
if ( $has_gradients_support && ! wp_should_skip_block_supports_serialization( $block_type, 'color', 'gradients' ) ) {
$preset_gradient_color = array_key_exists( 'gradient', $block_attributes ) ? "var:preset|gradient|{$block_attributes['gradient']}" : null;
$custom_gradient_color = isset( $block_attributes['style']['color']['gradient'] ) ? $block_attributes['style']['color']['gradient'] : null;
$color_block_styles['gradient'] = $preset_gradient_color ? $preset_gradient_color : $custom_gradient_color;
}
$attributes = array();
$styles = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );
if ( ! empty( $styles['classnames'] ) ) {
$attributes['class'] = $styles['classnames'];
}
if ( ! empty( $styles['css'] ) ) {
$attributes['style'] = $styles['css'];
}
return $attributes;
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'colors',
array(
'register_attribute' => 'wp_register_colors_support',
'apply' => 'wp_apply_colors_support',
)
);