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<?php
/**
* Typography block support flag.
*
* @package WordPress
* @since 5.6.0
*/
/**
* Registers the style and typography block attributes for block types that support it.
*
* @since 5.6.0
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_typography_support( $block_type ) {
if ( ! property_exists( $block_type, 'supports' ) ) {
return;
}
$typography_supports = _wp_array_get( $block_type->supports, array( 'typography' ), false );
if ( ! $typography_supports ) {
return;
}
$has_font_family_support = _wp_array_get( $typography_supports, array( '__experimentalFontFamily' ), false );
$has_font_size_support = _wp_array_get( $typography_supports, array( 'fontSize' ), false );
$has_font_style_support = _wp_array_get( $typography_supports, array( '__experimentalFontStyle' ), false );
$has_font_weight_support = _wp_array_get( $typography_supports, array( '__experimentalFontWeight' ), false );
$has_letter_spacing_support = _wp_array_get( $typography_supports, array( '__experimentalLetterSpacing' ), false );
$has_line_height_support = _wp_array_get( $typography_supports, array( 'lineHeight' ), false );
$has_text_decoration_support = _wp_array_get( $typography_supports, array( '__experimentalTextDecoration' ), false );
$has_text_transform_support = _wp_array_get( $typography_supports, array( '__experimentalTextTransform' ), false );
$has_typography_support = $has_font_family_support
|| $has_font_size_support
|| $has_font_style_support
|| $has_font_weight_support
|| $has_letter_spacing_support
|| $has_line_height_support
|| $has_text_decoration_support
|| $has_text_transform_support;
if ( ! $block_type->attributes ) {
$block_type->attributes = array();
}
if ( $has_typography_support && ! array_key_exists( 'style', $block_type->attributes ) ) {
$block_type->attributes['style'] = array(
'type' => 'object',
);
}
if ( $has_font_size_support && ! array_key_exists( 'fontSize', $block_type->attributes ) ) {
$block_type->attributes['fontSize'] = array(
'type' => 'string',
);
}
}
/**
* Adds CSS classes and inline styles for typography features such as font sizes
* to the incoming attributes array. This will be applied to the block markup in
* the front-end.
*
* @since 5.6.0
* @access private
*
* @param WP_Block_Type $block_type Block type.
* @param array $block_attributes Block attributes.
* @return array Typography CSS classes and inline styles.
*/
function wp_apply_typography_support( $block_type, $block_attributes ) {
if ( ! property_exists( $block_type, 'supports' ) ) {
return array();
}
$typography_supports = _wp_array_get( $block_type->supports, array( 'typography' ), false );
if ( ! $typography_supports ) {
return array();
}
if ( wp_should_skip_block_supports_serialization( $block_type, 'typography' ) ) {
return array();
}
$attributes = array();
$classes = array();
$styles = array();
$has_font_family_support = _wp_array_get( $typography_supports, array( '__experimentalFontFamily' ), false );
$has_font_size_support = _wp_array_get( $typography_supports, array( 'fontSize' ), false );
$has_font_style_support = _wp_array_get( $typography_supports, array( '__experimentalFontStyle' ), false );
$has_font_weight_support = _wp_array_get( $typography_supports, array( '__experimentalFontWeight' ), false );
$has_letter_spacing_support = _wp_array_get( $typography_supports, array( '__experimentalLetterSpacing' ), false );
$has_line_height_support = _wp_array_get( $typography_supports, array( 'lineHeight' ), false );
$has_text_decoration_support = _wp_array_get( $typography_supports, array( '__experimentalTextDecoration' ), false );
$has_text_transform_support = _wp_array_get( $typography_supports, array( '__experimentalTextTransform' ), false );
if ( $has_font_size_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontSize' ) ) {
$has_named_font_size = array_key_exists( 'fontSize', $block_attributes );
$has_custom_font_size = isset( $block_attributes['style']['typography']['fontSize'] );
if ( $has_named_font_size ) {
$classes[] = sprintf( 'has-%s-font-size', _wp_to_kebab_case( $block_attributes['fontSize'] ) );
} elseif ( $has_custom_font_size ) {
$styles[] = sprintf( 'font-size: %s;', $block_attributes['style']['typography']['fontSize'] );
}
}
if ( $has_font_family_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontFamily' ) ) {
$has_named_font_family = array_key_exists( 'fontFamily', $block_attributes );
$has_custom_font_family = isset( $block_attributes['style']['typography']['fontFamily'] );
if ( $has_named_font_family ) {
$classes[] = sprintf( 'has-%s-font-family', _wp_to_kebab_case( $block_attributes['fontFamily'] ) );
} elseif ( $has_custom_font_family ) {
// Before using classes, the value was serialized as a CSS Custom Property.
// We don't need this code path when it lands in core.
$font_family_custom = $block_attributes['style']['typography']['fontFamily'];
if ( strpos( $font_family_custom, 'var:preset|font-family' ) !== false ) {
$index_to_splice = strrpos( $font_family_custom, '|' ) + 1;
$font_family_slug = _wp_to_kebab_case( substr( $font_family_custom, $index_to_splice ) );
$font_family_custom = sprintf( 'var(--wp--preset--font-family--%s)', $font_family_slug );
}
$styles[] = sprintf( 'font-family: %s;', $font_family_custom );
}
}
if ( $has_font_style_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontStyle' ) ) {
$font_style = wp_typography_get_css_variable_inline_style( $block_attributes, 'fontStyle', 'font-style' );
if ( $font_style ) {
$styles[] = $font_style;
}
}
if ( $has_font_weight_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontWeight' ) ) {
$font_weight = wp_typography_get_css_variable_inline_style( $block_attributes, 'fontWeight', 'font-weight' );
if ( $font_weight ) {
$styles[] = $font_weight;
}
}
if ( $has_line_height_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'lineHeight' ) ) {
$has_line_height = isset( $block_attributes['style']['typography']['lineHeight'] );
if ( $has_line_height ) {
$styles[] = sprintf( 'line-height: %s;', $block_attributes['style']['typography']['lineHeight'] );
}
}
if ( $has_text_decoration_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textDecoration' ) ) {
$text_decoration_style = wp_typography_get_css_variable_inline_style( $block_attributes, 'textDecoration', 'text-decoration' );
if ( $text_decoration_style ) {
$styles[] = $text_decoration_style;
}
}
if ( $has_text_transform_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textTransform' ) ) {
$text_transform_style = wp_typography_get_css_variable_inline_style( $block_attributes, 'textTransform', 'text-transform' );
if ( $text_transform_style ) {
$styles[] = $text_transform_style;
}
}
if ( $has_letter_spacing_support && ! wp_should_skip_block_supports_serialization( $block_type, 'typography', 'letterSpacing' ) ) {
$letter_spacing_style = wp_typography_get_css_variable_inline_style( $block_attributes, 'letterSpacing', 'letter-spacing' );
if ( $letter_spacing_style ) {
$styles[] = $letter_spacing_style;
}
}
if ( ! empty( $classes ) ) {
$attributes['class'] = implode( ' ', $classes );
}
if ( ! empty( $styles ) ) {
$attributes['style'] = implode( ' ', $styles );
}
return $attributes;
}
/**
* Generates an inline style for a typography feature e.g. text decoration,
* text transform, and font style.
*
* @since 5.8.0
* @access private
*
* @param array $attributes Block's attributes.
* @param string $feature Key for the feature within the typography styles.
* @param string $css_property Slug for the CSS property the inline style sets.
* @return string CSS inline style.
*/
function wp_typography_get_css_variable_inline_style( $attributes, $feature, $css_property ) {
// Retrieve current attribute value or skip if not found.
$style_value = _wp_array_get( $attributes, array( 'style', 'typography', $feature ), false );
if ( ! $style_value ) {
return;
}
// If we don't have a preset CSS variable, we'll assume it's a regular CSS value.
if ( strpos( $style_value, "var:preset|{$css_property}|" ) === false ) {
return sprintf( '%s:%s;', $css_property, $style_value );
}
// We have a preset CSS variable as the style.
// Get the style value from the string and return CSS style.
$index_to_splice = strrpos( $style_value, '|' ) + 1;
$slug = substr( $style_value, $index_to_splice );
// Return the actual CSS inline style e.g. `text-decoration:var(--wp--preset--text-decoration--underline);`.
return sprintf( '%s:var(--wp--preset--%s--%s);', $css_property, $css_property, $slug );
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'typography',
array(
'register_attribute' => 'wp_register_typography_support',
'apply' => 'wp_apply_typography_support',
)
);