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', ); } } /** * 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 * @since 6.1.0 Used 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 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(); } $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 = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontSize' ); $should_skip_font_family = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontFamily' ); $should_skip_font_style = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontStyle' ); $should_skip_font_weight = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontWeight' ); $should_skip_line_height = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'lineHeight' ); $should_skip_text_decoration = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textDecoration' ); $should_skip_text_transform = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textTransform' ); $should_skip_letter_spacing = wp_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'] ) ? wp_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'] = wp_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'] = wp_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' ) ); } if ( $has_text_decoration_support && ! $should_skip_text_decoration && isset( $block_attributes['style']['typography']['textDecoration'] ) ) { $typography_block_styles['textDecoration'] = wp_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'] = wp_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'] = wp_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['letterSpacing'], 'letter-spacing' ); } $attributes = array(); $styles = wp_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; } /** * Generates an inline style value for a typography feature e.g. text decoration, * text transform, and font style. * * Note: This function is for backwards compatibility. * * It is necessary to parse older blocks whose typography styles contain presets. * * It mostly replaces the deprecated `wp_typography_get_css_variable_inline_style()`, * but skips compiling a CSS declaration as the style engine takes over this role. * @link https://github.com/wordpress/gutenberg/pull/27555 * * @since 6.1.0 * * @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 wp_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 WordPress/gutenberg#27555. * A preset CSS variable is the style. * Gets 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 ); } /** * Checks a string for a unit and value and returns an array * consisting of `'value'` and `'unit'`, e.g., [ '42', 'rem' ]. * * @since 6.1.0 * @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 string[] $acceptable_units An array of font size units. Default `[ 'rem', 'px', 'em' ]`; * } * @return array|null An array consisting of `'value'` and `'unit'` properties on success. * `null` on failure. */ function wp_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 ); // Bails out if not 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, possibly 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 CSS clamp() based on available min/max viewport * width and min/max font sizes. * * @since 6.1.0 * @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() on success. Else, null. */ function wp_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 = wp_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 = wp_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 = wp_get_typography_value_and_unit( $minimum_font_size_raw, array( 'coerce_to' => 'rem', ) ); // Viewport widths defined for fluid typography. Normalize units. $maximum_viewport_width = wp_get_typography_value_and_unit( $maximum_viewport_width_raw, array( 'coerce_to' => $font_size_unit, ) ); $minimum_viewport_width = wp_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. * * @since 6.1.0 * * @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 wp_get_typography_font_size_value( $preset, $should_use_fluid_typography = false ) { // Checks if fluid font sizes are activated. $typography_settings = wp_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 = wp_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 = wp_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' => 'wp_register_typography_support', 'apply' => 'wp_apply_typography_support', ) );