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Mini Shell
Mini Shell
<?php
/**
* Typography block support flag.
*
* @package gutenberg
*/
/**
* Registers the style and typography block attributes for block types that support it.
*
* @param WP_Block_Type $block_type Block Type.
*/
function gutenberg_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',
);
}
if ( $has_font_family_support && ! array_key_exists( 'fontFamily', $block_type->attributes ) ) {
$block_type->attributes['fontFamily'] = array(
'type' => 'string',
);
}
}
/**
* Add 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.
*
* @param WP_Block_Type $block_type Block type.
* @param array $block_attributes Block attributes.
*
* @return array Typography CSS classes and inline styles.
*/
function gutenberg_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 ( gutenberg_should_skip_block_supports_serialization( $block_type, 'typography' ) ) {
return 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 );
// Whether to skip individual block support features.
$should_skip_font_size = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'fontSize' );
$should_skip_font_family = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'fontFamily' );
$should_skip_font_style = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'fontStyle' );
$should_skip_font_weight = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'fontWeight' );
$should_skip_line_height = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'lineHeight' );
$should_skip_text_decoration = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'textDecoration' );
$should_skip_text_transform = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'textTransform' );
$should_skip_letter_spacing = gutenberg_should_skip_block_supports_serialization( $block_type, 'typography', 'letterSpacing' );
$typography_block_styles = array();
if ( $has_font_size_support && ! $should_skip_font_size ) {
$preset_font_size = array_key_exists( 'fontSize', $block_attributes ) ? "var:preset|font-size|{$block_attributes['fontSize']}" : null;
$custom_font_size = isset( $block_attributes['style']['typography']['fontSize'] ) ? $block_attributes['style']['typography']['fontSize'] : null;
$typography_block_styles['fontSize'] = $preset_font_size ? $preset_font_size : $custom_font_size;
}
if ( $has_font_family_support && ! $should_skip_font_family ) {
$preset_font_family = array_key_exists( 'fontFamily', $block_attributes ) ? "var:preset|font-family|{$block_attributes['fontFamily']}" : null;
$custom_font_family = isset( $block_attributes['style']['typography']['fontFamily'] ) ? gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['fontFamily'], 'font-family' ) : null;
$typography_block_styles['fontFamily'] = $preset_font_family ? $preset_font_family : $custom_font_family;
}
if ( $has_font_style_support && ! $should_skip_font_style && isset( $block_attributes['style']['typography']['fontStyle'] ) ) {
$typography_block_styles['fontStyle'] =
gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['fontStyle'], 'font-style' );
}
if ( $has_font_weight_support && ! $should_skip_font_weight && isset( $block_attributes['style']['typography']['fontWeight'] ) ) {
$typography_block_styles['fontWeight'] =
gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['fontWeight'], 'font-weight' );
}
if ( $has_line_height_support && ! $should_skip_line_height ) {
$typography_block_styles['lineHeight'] = _wp_array_get( $block_attributes, array( 'style', 'typography', 'lineHeight' ), null );
}
if ( $has_text_decoration_support && ! $should_skip_text_decoration && isset( $block_attributes['style']['typography']['textDecoration'] ) ) {
$typography_block_styles['textDecoration'] =
gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['textDecoration'], 'text-decoration' );
}
if ( $has_text_transform_support && ! $should_skip_text_transform && isset( $block_attributes['style']['typography']['textTransform'] ) ) {
$typography_block_styles['textTransform'] =
gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['textTransform'], 'text-transform' );
}
if ( $has_letter_spacing_support && ! $should_skip_letter_spacing && isset( $block_attributes['style']['typography']['letterSpacing'] ) ) {
$typography_block_styles['letterSpacing'] =
gutenberg_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['letterSpacing'], 'letter-spacing' );
}
$attributes = array();
$styles = gutenberg_style_engine_get_styles(
array( 'typography' => $typography_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;
}
/**
* Note: this method is for backwards compatibility.
* It mostly replaces `gutenberg_typography_get_css_variable_inline_style()`.
*
* Generates an inline style value for a typography feature e.g. text decoration,
* text transform, and font style.
*
* @param string $style_value A raw style value for a single typography feature from a block's style attribute.
* @param string $css_property Slug for the CSS property the inline style sets.
*
* @return string? A CSS inline style value.
*/
function gutenberg_typography_get_preset_inline_style_value( $style_value, $css_property ) {
// If the style value is not a preset CSS variable go no further.
if ( empty( $style_value ) || ! str_contains( $style_value, "var:preset|{$css_property}|" ) ) {
return $style_value;
}
// For backwards compatibility.
// Presets were removed in https://github.com/WordPress/gutenberg/pull/27555.
// 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 = _wp_to_kebab_case( substr( $style_value, $index_to_splice ) );
// Return the actual CSS inline style value e.g. `var(--wp--preset--text-decoration--underline);`.
return sprintf( 'var(--wp--preset--%s--%s);', $css_property, $slug );
}
/**
* Deprecated.
* This method is no longer used and will have to be deprecated in Core.
*
* It can be deleted once migrated to the next WordPress version.
*
* Generates an inline style for a typography feature e.g. text decoration,
* text transform, and font style.
*
* @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 gutenberg_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 ( ! str_contains( $style_value, "var:preset|{$css_property}|" ) ) {
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 );
}
/**
* Internal method that checks a string for a unit and value and returns an array consisting of `'value'` and `'unit'`, e.g., [ '42', 'rem' ].
*
* @access private
*
* @param string $raw_value Raw size value from theme.json.
* @param array $options {
* Optional. An associative array of options. Default is empty array.
*
* @type string $coerce_to Coerce the value to rem or px. Default `'rem'`.
* @type int $root_size_value Value of root font size for rem|em <-> px conversion. Default `16`.
* @type array<string> $acceptable_units An array of font size units. Default `[ 'rem', 'px', 'em' ]`;
* }
* @return array An array consisting of `'value'` and `'unit'` properties.
*/
function gutenberg_get_typography_value_and_unit( $raw_value, $options = array() ) {
if ( empty( $raw_value ) ) {
return null;
}
$defaults = array(
'coerce_to' => '',
'root_size_value' => 16,
'acceptable_units' => array( 'rem', 'px', 'em' ),
);
$options = wp_parse_args( $options, $defaults );
$acceptable_units_group = implode( '|', $options['acceptable_units'] );
$pattern = '/^(\d*\.?\d+)(' . $acceptable_units_group . '){1,1}$/';
preg_match( $pattern, $raw_value, $matches );
// We need a number value and a px or rem unit.
if ( ! isset( $matches[1] ) || ! isset( $matches[2] ) ) {
return null;
}
$value = $matches[1];
$unit = $matches[2];
// Default browser font size. Later we could inject some JS to compute this `getComputedStyle( document.querySelector( "html" ) ).fontSize`.
if ( 'px' === $options['coerce_to'] && ( 'em' === $unit || 'rem' === $unit ) ) {
$value = $value * $options['root_size_value'];
$unit = $options['coerce_to'];
}
if ( 'px' === $unit && ( 'em' === $options['coerce_to'] || 'rem' === $options['coerce_to'] ) ) {
$value = $value / $options['root_size_value'];
$unit = $options['coerce_to'];
}
return array(
'value' => $value,
'unit' => $unit,
);
}
/**
* Internal implementation of clamp() based on available min/max viewport width, and min/max font sizes.
*
* @access private
*
* @param array $args {
* Optional. An associative array of values to calculate a fluid formula for font size. Default is empty array.
*
* @type string $maximum_viewport_width Maximum size up to which type will have fluidity.
* @type string $minimum_viewport_width Minimum viewport size from which type will have fluidity.
* @type string $maximum_font_size Maximum font size for any clamp() calculation.
* @type string $minimum_font_size Minimum font size for any clamp() calculation.
* @type int $scale_factor A scale factor to determine how fast a font scales within boundaries.
* }
* @return string|null A font-size value using clamp().
*/
function gutenberg_get_computed_fluid_typography_value( $args = array() ) {
$maximum_viewport_width_raw = isset( $args['maximum_viewport_width'] ) ? $args['maximum_viewport_width'] : null;
$minimum_viewport_width_raw = isset( $args['minimum_viewport_width'] ) ? $args['minimum_viewport_width'] : null;
$maximum_font_size_raw = isset( $args['maximum_font_size'] ) ? $args['maximum_font_size'] : null;
$minimum_font_size_raw = isset( $args['minimum_font_size'] ) ? $args['minimum_font_size'] : null;
$scale_factor = isset( $args['scale_factor'] ) ? $args['scale_factor'] : null;
// Grab the minimum font size and normalize it in order to use the value for calculations.
$minimum_font_size = gutenberg_get_typography_value_and_unit( $minimum_font_size_raw );
// We get a 'preferred' unit to keep units consistent when calculating,
// otherwise the result will not be accurate.
$font_size_unit = isset( $minimum_font_size['unit'] ) ? $minimum_font_size['unit'] : 'rem';
// Grab the maximum font size and normalize it in order to use the value for calculations.
$maximum_font_size = gutenberg_get_typography_value_and_unit(
$maximum_font_size_raw,
array(
'coerce_to' => $font_size_unit,
)
);
// Protect against unsupported units.
if ( ! $maximum_font_size || ! $minimum_font_size ) {
return null;
}
// Use rem for accessible fluid target font scaling.
$minimum_font_size_rem = gutenberg_get_typography_value_and_unit(
$minimum_font_size_raw,
array(
'coerce_to' => 'rem',
)
);
// Viewport widths defined for fluid typography. Normalize units.
$maximum_viewport_width = gutenberg_get_typography_value_and_unit(
$maximum_viewport_width_raw,
array(
'coerce_to' => $font_size_unit,
)
);
$minimum_viewport_width = gutenberg_get_typography_value_and_unit(
$minimum_viewport_width_raw,
array(
'coerce_to' => $font_size_unit,
)
);
// Build CSS rule.
// Borrowed from https://websemantics.uk/tools/responsive-font-calculator/.
$view_port_width_offset = round( $minimum_viewport_width['value'] / 100, 3 ) . $font_size_unit;
$linear_factor = 100 * ( ( $maximum_font_size['value'] - $minimum_font_size['value'] ) / ( $maximum_viewport_width['value'] - $minimum_viewport_width['value'] ) );
$linear_factor = round( $linear_factor, 3 ) * $scale_factor;
$fluid_target_font_size = implode( '', $minimum_font_size_rem ) . " + ((1vw - $view_port_width_offset) * $linear_factor)";
return "clamp($minimum_font_size_raw, $fluid_target_font_size, $maximum_font_size_raw)";
}
/**
* Returns a font-size value based on a given font-size preset.
* Takes into account fluid typography parameters and attempts to return a css formula depending on available, valid values.
*
* @param array $preset {
* Required. fontSizes preset value as seen in theme.json.
*
* @type string $name Name of the font size preset.
* @type string $slug Kebab-case unique identifier for the font size preset.
* @type string $size CSS font-size value, including units where applicable.
* }
* @param bool $should_use_fluid_typography An override to switch fluid typography "on". Can be used for unit testing. Default is `false`.
*
* @return string Font-size value.
*/
function gutenberg_get_typography_font_size_value( $preset, $should_use_fluid_typography = false ) {
// Check if fluid font sizes are activated.
$typography_settings = gutenberg_get_global_settings( array( 'typography' ) );
$should_use_fluid_typography = isset( $typography_settings['fluid'] ) && true === $typography_settings['fluid'] ? true : $should_use_fluid_typography;
if ( ! $should_use_fluid_typography ) {
return $preset['size'];
}
// Defaults.
$default_maximum_viewport_width = '1600px';
$default_minimum_viewport_width = '768px';
$default_minimum_font_size_factor = 0.75;
$default_maximum_font_size_factor = 1.5;
$default_scale_factor = 1;
// Font sizes.
$fluid_font_size_settings = isset( $preset['fluid'] ) ? $preset['fluid'] : null;
// A font size has explicitly bypassed fluid calculations.
if ( false === $fluid_font_size_settings ) {
return $preset['size'];
}
// Try to grab explicit min and max fluid font sizes.
$minimum_font_size_raw = isset( $fluid_font_size_settings['min'] ) ? $fluid_font_size_settings['min'] : null;
$maximum_font_size_raw = isset( $fluid_font_size_settings['max'] ) ? $fluid_font_size_settings['max'] : null;
// Font sizes.
$preferred_size = gutenberg_get_typography_value_and_unit( $preset['size'] );
// Protect against unsupported units.
if ( empty( $preferred_size['unit'] ) ) {
return $preset['size'];
}
// If no fluid min or max font sizes are available, create some using min/max font size factors.
if ( ! $minimum_font_size_raw ) {
$minimum_font_size_raw = ( $preferred_size['value'] * $default_minimum_font_size_factor ) . $preferred_size['unit'];
}
if ( ! $maximum_font_size_raw ) {
$maximum_font_size_raw = ( $preferred_size['value'] * $default_maximum_font_size_factor ) . $preferred_size['unit'];
}
$fluid_font_size_value = gutenberg_get_computed_fluid_typography_value(
array(
'minimum_viewport_width' => $default_minimum_viewport_width,
'maximum_viewport_width' => $default_maximum_viewport_width,
'minimum_font_size' => $minimum_font_size_raw,
'maximum_font_size' => $maximum_font_size_raw,
'scale_factor' => $default_scale_factor,
)
);
if ( ! empty( $fluid_font_size_value ) ) {
return $fluid_font_size_value;
}
return $preset['size'];
}
// Register the block support.
WP_Block_Supports::get_instance()->register(
'typography',
array(
'register_attribute' => 'gutenberg_register_typography_support',
'apply' => 'gutenberg_apply_typography_support',
)
);
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