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06a098f174
Fixes a division error by returning null when `minViewportWidth` - `maxViewportWidth` is zero in `wp_get_computed_fluid_typography_value`. Props ramonopoly, mukesh27, andrewserong, audrasjb. Fixes #60263. Built from https://develop.svn.wordpress.org/trunk@57329 git-svn-id: http://core.svn.wordpress.org/trunk@56835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
660 lines
27 KiB
PHP
660 lines
27 KiB
PHP
<?php
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/**
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* Typography block support flag.
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*
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* @package WordPress
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* @since 5.6.0
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*/
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/**
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* Registers the style and typography block attributes for block types that support it.
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*
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* @since 5.6.0
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* @since 6.3.0 Added support for text-columns.
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* @access private
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*
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* @param WP_Block_Type $block_type Block Type.
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*/
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function wp_register_typography_support( $block_type ) {
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if ( ! ( $block_type instanceof WP_Block_Type ) ) {
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return;
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}
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$typography_supports = isset( $block_type->supports['typography'] ) ? $block_type->supports['typography'] : false;
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if ( ! $typography_supports ) {
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return;
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}
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$has_font_family_support = isset( $typography_supports['__experimentalFontFamily'] ) ? $typography_supports['__experimentalFontFamily'] : false;
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$has_font_size_support = isset( $typography_supports['fontSize'] ) ? $typography_supports['fontSize'] : false;
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$has_font_style_support = isset( $typography_supports['__experimentalFontStyle'] ) ? $typography_supports['__experimentalFontStyle'] : false;
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$has_font_weight_support = isset( $typography_supports['__experimentalFontWeight'] ) ? $typography_supports['__experimentalFontWeight'] : false;
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$has_letter_spacing_support = isset( $typography_supports['__experimentalLetterSpacing'] ) ? $typography_supports['__experimentalLetterSpacing'] : false;
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$has_line_height_support = isset( $typography_supports['lineHeight'] ) ? $typography_supports['lineHeight'] : false;
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$has_text_columns_support = isset( $typography_supports['textColumns'] ) ? $typography_supports['textColumns'] : false;
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$has_text_decoration_support = isset( $typography_supports['__experimentalTextDecoration'] ) ? $typography_supports['__experimentalTextDecoration'] : false;
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$has_text_transform_support = isset( $typography_supports['__experimentalTextTransform'] ) ? $typography_supports['__experimentalTextTransform'] : false;
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$has_writing_mode_support = isset( $typography_supports['__experimentalWritingMode'] ) ? $typography_supports['__experimentalWritingMode'] : false;
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$has_typography_support = $has_font_family_support
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|| $has_font_size_support
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|| $has_font_style_support
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|| $has_font_weight_support
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|| $has_letter_spacing_support
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|| $has_line_height_support
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|| $has_text_columns_support
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|| $has_text_decoration_support
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|| $has_text_transform_support
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|| $has_writing_mode_support;
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if ( ! $block_type->attributes ) {
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$block_type->attributes = array();
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}
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if ( $has_typography_support && ! array_key_exists( 'style', $block_type->attributes ) ) {
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$block_type->attributes['style'] = array(
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'type' => 'object',
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);
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}
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if ( $has_font_size_support && ! array_key_exists( 'fontSize', $block_type->attributes ) ) {
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$block_type->attributes['fontSize'] = array(
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'type' => 'string',
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);
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}
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if ( $has_font_family_support && ! array_key_exists( 'fontFamily', $block_type->attributes ) ) {
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$block_type->attributes['fontFamily'] = array(
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'type' => 'string',
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);
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}
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}
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/**
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* Adds CSS classes and inline styles for typography features such as font sizes
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* to the incoming attributes array. This will be applied to the block markup in
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* the front-end.
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*
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* @since 5.6.0
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* @since 6.1.0 Used the style engine to generate CSS and classnames.
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* @since 6.3.0 Added support for text-columns.
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* @access private
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*
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* @param WP_Block_Type $block_type Block type.
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* @param array $block_attributes Block attributes.
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* @return array Typography CSS classes and inline styles.
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*/
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function wp_apply_typography_support( $block_type, $block_attributes ) {
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if ( ! ( $block_type instanceof WP_Block_Type ) ) {
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return array();
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}
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$typography_supports = isset( $block_type->supports['typography'] )
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? $block_type->supports['typography']
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: false;
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if ( ! $typography_supports ) {
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return array();
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}
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if ( wp_should_skip_block_supports_serialization( $block_type, 'typography' ) ) {
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return array();
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}
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$has_font_family_support = isset( $typography_supports['__experimentalFontFamily'] ) ? $typography_supports['__experimentalFontFamily'] : false;
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$has_font_size_support = isset( $typography_supports['fontSize'] ) ? $typography_supports['fontSize'] : false;
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$has_font_style_support = isset( $typography_supports['__experimentalFontStyle'] ) ? $typography_supports['__experimentalFontStyle'] : false;
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$has_font_weight_support = isset( $typography_supports['__experimentalFontWeight'] ) ? $typography_supports['__experimentalFontWeight'] : false;
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$has_letter_spacing_support = isset( $typography_supports['__experimentalLetterSpacing'] ) ? $typography_supports['__experimentalLetterSpacing'] : false;
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$has_line_height_support = isset( $typography_supports['lineHeight'] ) ? $typography_supports['lineHeight'] : false;
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$has_text_columns_support = isset( $typography_supports['textColumns'] ) ? $typography_supports['textColumns'] : false;
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$has_text_decoration_support = isset( $typography_supports['__experimentalTextDecoration'] ) ? $typography_supports['__experimentalTextDecoration'] : false;
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$has_text_transform_support = isset( $typography_supports['__experimentalTextTransform'] ) ? $typography_supports['__experimentalTextTransform'] : false;
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$has_writing_mode_support = isset( $typography_supports['__experimentalWritingMode'] ) ? $typography_supports['__experimentalWritingMode'] : false;
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// Whether to skip individual block support features.
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$should_skip_font_size = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontSize' );
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$should_skip_font_family = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontFamily' );
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$should_skip_font_style = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontStyle' );
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$should_skip_font_weight = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'fontWeight' );
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$should_skip_line_height = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'lineHeight' );
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$should_skip_text_columns = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textColumns' );
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$should_skip_text_decoration = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textDecoration' );
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$should_skip_text_transform = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textTransform' );
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$should_skip_letter_spacing = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'letterSpacing' );
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$should_skip_writing_mode = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'writingMode' );
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$typography_block_styles = array();
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if ( $has_font_size_support && ! $should_skip_font_size ) {
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$preset_font_size = array_key_exists( 'fontSize', $block_attributes )
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? "var:preset|font-size|{$block_attributes['fontSize']}"
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: null;
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$custom_font_size = isset( $block_attributes['style']['typography']['fontSize'] )
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? $block_attributes['style']['typography']['fontSize']
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: null;
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$typography_block_styles['fontSize'] = $preset_font_size ? $preset_font_size : wp_get_typography_font_size_value(
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array(
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'size' => $custom_font_size,
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)
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);
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}
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if ( $has_font_family_support && ! $should_skip_font_family ) {
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$preset_font_family = array_key_exists( 'fontFamily', $block_attributes )
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? "var:preset|font-family|{$block_attributes['fontFamily']}"
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: null;
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$custom_font_family = isset( $block_attributes['style']['typography']['fontFamily'] )
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? wp_typography_get_preset_inline_style_value( $block_attributes['style']['typography']['fontFamily'], 'font-family' )
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: null;
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$typography_block_styles['fontFamily'] = $preset_font_family ? $preset_font_family : $custom_font_family;
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}
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if (
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$has_font_style_support &&
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! $should_skip_font_style &&
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isset( $block_attributes['style']['typography']['fontStyle'] )
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) {
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$typography_block_styles['fontStyle'] = wp_typography_get_preset_inline_style_value(
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$block_attributes['style']['typography']['fontStyle'],
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'font-style'
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);
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}
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if (
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$has_font_weight_support &&
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! $should_skip_font_weight &&
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isset( $block_attributes['style']['typography']['fontWeight'] )
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) {
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$typography_block_styles['fontWeight'] = wp_typography_get_preset_inline_style_value(
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$block_attributes['style']['typography']['fontWeight'],
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'font-weight'
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);
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}
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if ( $has_line_height_support && ! $should_skip_line_height ) {
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$typography_block_styles['lineHeight'] = isset( $block_attributes['style']['typography']['lineHeight'] )
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? $block_attributes['style']['typography']['lineHeight']
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: null;
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}
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if ( $has_text_columns_support && ! $should_skip_text_columns && isset( $block_attributes['style']['typography']['textColumns'] ) ) {
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$typography_block_styles['textColumns'] = isset( $block_attributes['style']['typography']['textColumns'] )
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? $block_attributes['style']['typography']['textColumns']
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: null;
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}
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if (
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$has_text_decoration_support &&
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! $should_skip_text_decoration &&
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isset( $block_attributes['style']['typography']['textDecoration'] )
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) {
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$typography_block_styles['textDecoration'] = wp_typography_get_preset_inline_style_value(
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$block_attributes['style']['typography']['textDecoration'],
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'text-decoration'
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);
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}
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if (
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$has_text_transform_support &&
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! $should_skip_text_transform &&
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isset( $block_attributes['style']['typography']['textTransform'] )
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) {
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$typography_block_styles['textTransform'] = wp_typography_get_preset_inline_style_value(
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$block_attributes['style']['typography']['textTransform'],
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'text-transform'
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);
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}
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if (
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$has_letter_spacing_support &&
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! $should_skip_letter_spacing &&
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isset( $block_attributes['style']['typography']['letterSpacing'] )
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) {
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$typography_block_styles['letterSpacing'] = wp_typography_get_preset_inline_style_value(
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$block_attributes['style']['typography']['letterSpacing'],
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'letter-spacing'
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);
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}
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if ( $has_writing_mode_support &&
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! $should_skip_writing_mode &&
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isset( $block_attributes['style']['typography']['writingMode'] )
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) {
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$typography_block_styles['writingMode'] = isset( $block_attributes['style']['typography']['writingMode'] )
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? $block_attributes['style']['typography']['writingMode']
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: null;
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}
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$attributes = array();
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$styles = wp_style_engine_get_styles(
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array( 'typography' => $typography_block_styles ),
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array( 'convert_vars_to_classnames' => true )
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);
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if ( ! empty( $styles['classnames'] ) ) {
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$attributes['class'] = $styles['classnames'];
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}
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if ( ! empty( $styles['css'] ) ) {
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$attributes['style'] = $styles['css'];
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}
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return $attributes;
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}
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/**
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* Generates an inline style value for a typography feature e.g. text decoration,
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* text transform, and font style.
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*
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* Note: This function is for backwards compatibility.
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* * It is necessary to parse older blocks whose typography styles contain presets.
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* * It mostly replaces the deprecated `wp_typography_get_css_variable_inline_style()`,
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* but skips compiling a CSS declaration as the style engine takes over this role.
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* @link https://github.com/wordpress/gutenberg/pull/27555
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*
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* @since 6.1.0
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*
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* @param string $style_value A raw style value for a single typography feature from a block's style attribute.
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* @param string $css_property Slug for the CSS property the inline style sets.
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* @return string A CSS inline style value.
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*/
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function wp_typography_get_preset_inline_style_value( $style_value, $css_property ) {
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// If the style value is not a preset CSS variable go no further.
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if ( empty( $style_value ) || ! str_contains( $style_value, "var:preset|{$css_property}|" ) ) {
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return $style_value;
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}
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/*
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* For backwards compatibility.
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* Presets were removed in WordPress/gutenberg#27555.
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* A preset CSS variable is the style.
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* Gets the style value from the string and return CSS style.
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*/
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$index_to_splice = strrpos( $style_value, '|' ) + 1;
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$slug = _wp_to_kebab_case( substr( $style_value, $index_to_splice ) );
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// Return the actual CSS inline style value,
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// e.g. `var(--wp--preset--text-decoration--underline);`.
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return sprintf( 'var(--wp--preset--%s--%s);', $css_property, $slug );
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}
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/**
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* Renders typography styles/content to the block wrapper.
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*
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* @since 6.1.0
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*
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* @param string $block_content Rendered block content.
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* @param array $block Block object.
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* @return string Filtered block content.
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*/
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function wp_render_typography_support( $block_content, $block ) {
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if ( ! isset( $block['attrs']['style']['typography']['fontSize'] ) ) {
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return $block_content;
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}
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$custom_font_size = $block['attrs']['style']['typography']['fontSize'];
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$fluid_font_size = wp_get_typography_font_size_value( array( 'size' => $custom_font_size ) );
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/*
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* Checks that $fluid_font_size does not match $custom_font_size,
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* which means it's been mutated by the fluid font size functions.
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*/
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if ( ! empty( $fluid_font_size ) && $fluid_font_size !== $custom_font_size ) {
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// Replaces the first instance of `font-size:$custom_font_size` with `font-size:$fluid_font_size`.
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return preg_replace( '/font-size\s*:\s*' . preg_quote( $custom_font_size, '/' ) . '\s*;?/', 'font-size:' . esc_attr( $fluid_font_size ) . ';', $block_content, 1 );
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}
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return $block_content;
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}
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/**
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* Checks a string for a unit and value and returns an array
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* consisting of `'value'` and `'unit'`, e.g. array( '42', 'rem' ).
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*
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* @since 6.1.0
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*
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* @param string|int|float $raw_value Raw size value from theme.json.
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* @param array $options {
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* Optional. An associative array of options. Default is empty array.
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*
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* @type string $coerce_to Coerce the value to rem or px. Default `'rem'`.
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* @type int $root_size_value Value of root font size for rem|em <-> px conversion. Default `16`.
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* @type string[] $acceptable_units An array of font size units. Default `array( 'rem', 'px', 'em' )`;
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* }
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* @return array|null An array consisting of `'value'` and `'unit'` properties on success.
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* `null` on failure.
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*/
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function wp_get_typography_value_and_unit( $raw_value, $options = array() ) {
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if ( ! is_string( $raw_value ) && ! is_int( $raw_value ) && ! is_float( $raw_value ) ) {
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_doing_it_wrong(
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__FUNCTION__,
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__( 'Raw size value must be a string, integer, or float.' ),
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'6.1.0'
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);
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return null;
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}
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if ( empty( $raw_value ) ) {
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return null;
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}
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// Converts numbers to pixel values by default.
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if ( is_numeric( $raw_value ) ) {
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$raw_value = $raw_value . 'px';
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}
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$defaults = array(
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'coerce_to' => '',
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'root_size_value' => 16,
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'acceptable_units' => array( 'rem', 'px', 'em' ),
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);
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$options = wp_parse_args( $options, $defaults );
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$acceptable_units_group = implode( '|', $options['acceptable_units'] );
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$pattern = '/^(\d*\.?\d+)(' . $acceptable_units_group . '){1,1}$/';
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preg_match( $pattern, $raw_value, $matches );
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// Bails out if not a number value and a px or rem unit.
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if ( ! isset( $matches[1] ) || ! isset( $matches[2] ) ) {
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return null;
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}
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$value = $matches[1];
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$unit = $matches[2];
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/*
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* Default browser font size. Later, possibly could inject some JS to
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* compute this `getComputedStyle( document.querySelector( "html" ) ).fontSize`.
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*/
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if ( 'px' === $options['coerce_to'] && ( 'em' === $unit || 'rem' === $unit ) ) {
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$value = $value * $options['root_size_value'];
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$unit = $options['coerce_to'];
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}
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if ( 'px' === $unit && ( 'em' === $options['coerce_to'] || 'rem' === $options['coerce_to'] ) ) {
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$value = $value / $options['root_size_value'];
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$unit = $options['coerce_to'];
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}
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/*
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* No calculation is required if swapping between em and rem yet,
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* since we assume a root size value. Later we might like to differentiate between
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* :root font size (rem) and parent element font size (em) relativity.
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*/
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if ( ( 'em' === $options['coerce_to'] || 'rem' === $options['coerce_to'] ) && ( 'em' === $unit || 'rem' === $unit ) ) {
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$unit = $options['coerce_to'];
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}
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return array(
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'value' => round( $value, 3 ),
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'unit' => $unit,
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);
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}
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/**
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* Internal implementation of CSS clamp() based on available min/max viewport
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* width and min/max font sizes.
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*
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* @since 6.1.0
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* @since 6.3.0 Checks for unsupported min/max viewport values that cause invalid clamp values.
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* @since 6.5.0 Returns early when min and max viewport subtraction is zero to avoid division by zero.
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* @access private
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*
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* @param array $args {
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* Optional. An associative array of values to calculate a fluid formula
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* for font size. Default is empty array.
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*
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* @type string $maximum_viewport_width Maximum size up to which type will have fluidity.
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* @type string $minimum_viewport_width Minimum viewport size from which type will have fluidity.
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* @type string $maximum_font_size Maximum font size for any clamp() calculation.
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* @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.
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|
* }
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|
* @return string|null A font-size value using clamp() on success, otherwise null.
|
|
*/
|
|
function wp_get_computed_fluid_typography_value( $args = array() ) {
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|
$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;
|
|
|
|
// Normalizes the minimum font size 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';
|
|
|
|
// Normalizes the maximum font size 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,
|
|
)
|
|
);
|
|
|
|
// Checks for mandatory min and max sizes, and protects against unsupported units.
|
|
if ( ! $maximum_font_size || ! $minimum_font_size ) {
|
|
return null;
|
|
}
|
|
|
|
// Uses 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,
|
|
)
|
|
);
|
|
|
|
// Protects against unsupported units in min and max viewport widths.
|
|
if ( ! $minimum_viewport_width || ! $maximum_viewport_width ) {
|
|
return null;
|
|
}
|
|
|
|
// Calculates the linear factor denominator. If it's 0, we cannot calculate a fluid value.
|
|
$linear_factor_denominator = $maximum_viewport_width['value'] - $minimum_viewport_width['value'];
|
|
if ( empty( $linear_factor_denominator ) ) {
|
|
return null;
|
|
}
|
|
|
|
/*
|
|
* 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'] ) / ( $linear_factor_denominator ) );
|
|
$linear_factor_scaled = round( $linear_factor * $scale_factor, 3 );
|
|
$linear_factor_scaled = empty( $linear_factor_scaled ) ? 1 : $linear_factor_scaled;
|
|
$fluid_target_font_size = implode( '', $minimum_font_size_rem ) . " + ((1vw - $view_port_width_offset) * $linear_factor_scaled)";
|
|
|
|
return "clamp($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
|
|
* @since 6.1.1 Adjusted rules for min and max font sizes.
|
|
* @since 6.2.0 Added 'settings.typography.fluid.minFontSize' support.
|
|
* @since 6.3.0 Using layout.wideSize as max viewport width, and logarithmic scale factor to calculate minimum font scale.
|
|
* @since 6.4.0 Added configurable min and max viewport width values to the typography.fluid theme.json schema.
|
|
*
|
|
* @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|int|float $size CSS font-size value, including units if 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|null Font-size value or null if a size is not passed in $preset.
|
|
*/
|
|
function wp_get_typography_font_size_value( $preset, $should_use_fluid_typography = false ) {
|
|
if ( ! isset( $preset['size'] ) ) {
|
|
return null;
|
|
}
|
|
|
|
/*
|
|
* Catches empty values and 0/'0'.
|
|
* Fluid calculations cannot be performed on 0.
|
|
*/
|
|
if ( empty( $preset['size'] ) ) {
|
|
return $preset['size'];
|
|
}
|
|
|
|
// Checks if fluid font sizes are activated.
|
|
$global_settings = wp_get_global_settings();
|
|
$typography_settings = isset( $global_settings['typography'] ) ? $global_settings['typography'] : array();
|
|
$layout_settings = isset( $global_settings['layout'] ) ? $global_settings['layout'] : array();
|
|
|
|
if (
|
|
isset( $typography_settings['fluid'] ) &&
|
|
( true === $typography_settings['fluid'] || is_array( $typography_settings['fluid'] ) )
|
|
) {
|
|
$should_use_fluid_typography = true;
|
|
}
|
|
|
|
if ( ! $should_use_fluid_typography ) {
|
|
return $preset['size'];
|
|
}
|
|
|
|
$fluid_settings = isset( $typography_settings['fluid'] ) && is_array( $typography_settings['fluid'] )
|
|
? $typography_settings['fluid']
|
|
: array();
|
|
|
|
// Defaults.
|
|
$default_maximum_viewport_width = '1600px';
|
|
$default_minimum_viewport_width = '320px';
|
|
$default_minimum_font_size_factor_max = 0.75;
|
|
$default_minimum_font_size_factor_min = 0.25;
|
|
$default_scale_factor = 1;
|
|
$default_minimum_font_size_limit = '14px';
|
|
|
|
// Defaults overrides.
|
|
$minimum_viewport_width = isset( $fluid_settings['minViewportWidth'] ) ? $fluid_settings['minViewportWidth'] : $default_minimum_viewport_width;
|
|
$maximum_viewport_width = isset( $layout_settings['wideSize'] ) && ! empty( wp_get_typography_value_and_unit( $layout_settings['wideSize'] ) ) ? $layout_settings['wideSize'] : $default_maximum_viewport_width;
|
|
if ( isset( $fluid_settings['maxViewportWidth'] ) ) {
|
|
$maximum_viewport_width = $fluid_settings['maxViewportWidth'];
|
|
}
|
|
$has_min_font_size = isset( $fluid_settings['minFontSize'] ) && ! empty( wp_get_typography_value_and_unit( $fluid_settings['minFontSize'] ) );
|
|
$minimum_font_size_limit = $has_min_font_size ? $fluid_settings['minFontSize'] : $default_minimum_font_size_limit;
|
|
|
|
// 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'] );
|
|
|
|
// Protects against unsupported units.
|
|
if ( empty( $preferred_size['unit'] ) ) {
|
|
return $preset['size'];
|
|
}
|
|
|
|
/*
|
|
* Normalizes the minimum font size limit according to the incoming unit,
|
|
* in order to perform comparative checks.
|
|
*/
|
|
$minimum_font_size_limit = wp_get_typography_value_and_unit(
|
|
$minimum_font_size_limit,
|
|
array(
|
|
'coerce_to' => $preferred_size['unit'],
|
|
)
|
|
);
|
|
|
|
// Don't enforce minimum font size if a font size has explicitly set a min and max value.
|
|
if ( ! empty( $minimum_font_size_limit ) && ( ! $minimum_font_size_raw && ! $maximum_font_size_raw ) ) {
|
|
/*
|
|
* If a minimum size was not passed to this function
|
|
* and the user-defined font size is lower than $minimum_font_size_limit,
|
|
* do not calculate a fluid value.
|
|
*/
|
|
if ( $preferred_size['value'] <= $minimum_font_size_limit['value'] ) {
|
|
return $preset['size'];
|
|
}
|
|
}
|
|
|
|
// If no fluid max font size is available use the incoming value.
|
|
if ( ! $maximum_font_size_raw ) {
|
|
$maximum_font_size_raw = $preferred_size['value'] . $preferred_size['unit'];
|
|
}
|
|
|
|
/*
|
|
* If no minimumFontSize is provided, create one using
|
|
* the given font size multiplied by the min font size scale factor.
|
|
*/
|
|
if ( ! $minimum_font_size_raw ) {
|
|
$preferred_font_size_in_px = 'px' === $preferred_size['unit'] ? $preferred_size['value'] : $preferred_size['value'] * 16;
|
|
|
|
/*
|
|
* The scale factor is a multiplier that affects how quickly the curve will move towards the minimum,
|
|
* that is, how quickly the size factor reaches 0 given increasing font size values.
|
|
* For a - b * log2(), lower values of b will make the curve move towards the minimum faster.
|
|
* The scale factor is constrained between min and max values.
|
|
*/
|
|
$minimum_font_size_factor = min( max( 1 - 0.075 * log( $preferred_font_size_in_px, 2 ), $default_minimum_font_size_factor_min ), $default_minimum_font_size_factor_max );
|
|
$calculated_minimum_font_size = round( $preferred_size['value'] * $minimum_font_size_factor, 3 );
|
|
|
|
// Only use calculated min font size if it's > $minimum_font_size_limit value.
|
|
if ( ! empty( $minimum_font_size_limit ) && $calculated_minimum_font_size <= $minimum_font_size_limit['value'] ) {
|
|
$minimum_font_size_raw = $minimum_font_size_limit['value'] . $minimum_font_size_limit['unit'];
|
|
} else {
|
|
$minimum_font_size_raw = $calculated_minimum_font_size . $preferred_size['unit'];
|
|
}
|
|
}
|
|
|
|
$fluid_font_size_value = wp_get_computed_fluid_typography_value(
|
|
array(
|
|
'minimum_viewport_width' => $minimum_viewport_width,
|
|
'maximum_viewport_width' => $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',
|
|
)
|
|
);
|