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/home/tahkoom/public_html/wp-includes/block-supports/typography.php
<?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
* @since 6.3.0 Added support for text-columns.
* @access private
*
* @param WP_Block_Type $block_type Block Type.
*/
function wp_register_typography_support( $block_type ) {
if ( ! ( $block_type instanceof WP_Block_Type ) ) {
return;
}
$typography_supports = isset( $block_type->supports['typography'] ) ? $block_type->supports['typography'] : false;
if ( ! $typography_supports ) {
return;
}
$has_font_family_support = isset( $typography_supports['__experimentalFontFamily'] ) ? $typography_supports['__experimentalFontFamily'] : false;
$has_font_size_support = isset( $typography_supports['fontSize'] ) ? $typography_supports['fontSize'] : false;
$has_font_style_support = isset( $typography_supports['__experimentalFontStyle'] ) ? $typography_supports['__experimentalFontStyle'] : false;
$has_font_weight_support = isset( $typography_supports['__experimentalFontWeight'] ) ? $typography_supports['__experimentalFontWeight'] : false;
$has_letter_spacing_support = isset( $typography_supports['__experimentalLetterSpacing'] ) ? $typography_supports['__experimentalLetterSpacing'] : false;
$has_line_height_support = isset( $typography_supports['lineHeight'] ) ? $typography_supports['lineHeight'] : false;
$has_text_align_support = isset( $typography_supports['textAlign'] ) ? $typography_supports['textAlign'] : false;
$has_text_columns_support = isset( $typography_supports['textColumns'] ) ? $typography_supports['textColumns'] : false;
$has_text_decoration_support = isset( $typography_supports['__experimentalTextDecoration'] ) ? $typography_supports['__experimentalTextDecoration'] : false;
$has_text_transform_support = isset( $typography_supports['__experimentalTextTransform'] ) ? $typography_supports['__experimentalTextTransform'] : false;
$has_writing_mode_support = isset( $typography_supports['__experimentalWritingMode'] ) ? $typography_supports['__experimentalWritingMode'] : 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_align_support
|| $has_text_columns_support
|| $has_text_decoration_support
|| $has_text_transform_support
|| $has_writing_mode_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.
* @since 6.3.0 Added support for text-columns.
* @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 ( ! ( $block_type instanceof WP_Block_Type ) ) {
return array();
}
$typography_supports = isset( $block_type->supports['typography'] )
? $block_type->supports['typography']
: false;
if ( ! $typography_supports ) {
return array();
}
if ( wp_should_skip_block_supports_serialization( $block_type, 'typography' ) ) {
return array();
}
$has_font_family_support = isset( $typography_supports['__experimentalFontFamily'] ) ? $typography_supports['__experimentalFontFamily'] : false;
$has_font_size_support = isset( $typography_supports['fontSize'] ) ? $typography_supports['fontSize'] : false;
$has_font_style_support = isset( $typography_supports['__experimentalFontStyle'] ) ? $typography_supports['__experimentalFontStyle'] : false;
$has_font_weight_support = isset( $typography_supports['__experimentalFontWeight'] ) ? $typography_supports['__experimentalFontWeight'] : false;
$has_letter_spacing_support = isset( $typography_supports['__experimentalLetterSpacing'] ) ? $typography_supports['__experimentalLetterSpacing'] : false;
$has_line_height_support = isset( $typography_supports['lineHeight'] ) ? $typography_supports['lineHeight'] : false;
$has_text_align_support = isset( $typography_supports['textAlign'] ) ? $typography_supports['textAlign'] : false;
$has_text_columns_support = isset( $typography_supports['textColumns'] ) ? $typography_supports['textColumns'] : false;
$has_text_decoration_support = isset( $typography_supports['__experimentalTextDecoration'] ) ? $typography_supports['__experimentalTextDecoration'] : false;
$has_text_transform_support = isset( $typography_supports['__experimentalTextTransform'] ) ? $typography_supports['__experimentalTextTransform'] : false;
$has_writing_mode_support = isset( $typography_supports['__experimentalWritingMode'] ) ? $typography_supports['__experimentalWritingMode'] : 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_align = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textAlign' );
$should_skip_text_columns = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'textColumns' );
$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' );
$should_skip_writing_mode = wp_should_skip_block_supports_serialization( $block_type, 'typography', 'writingMode' );
$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 : wp_get_typography_font_size_value(
array(
'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'] = isset( $block_attributes['style']['typography']['lineHeight'] )
? $block_attributes['style']['typography']['lineHeight']
: null;
}
if ( $has_text_align_support && ! $should_skip_text_align ) {
$typography_block_styles['textAlign'] = isset( $block_attributes['style']['typography']['textAlign'] )
? $block_attributes['style']['typography']['textAlign']
: null;
}
if ( $has_text_columns_support && ! $should_skip_text_columns && isset( $block_attributes['style']['typography']['textColumns'] ) ) {
$typography_block_styles['textColumns'] = isset( $block_attributes['style']['typography']['textColumns'] )
? $block_attributes['style']['typography']['textColumns']
: null;
}
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'
);
}
if ( $has_writing_mode_support &&
! $should_skip_writing_mode &&
isset( $block_attributes['style']['typography']['writingMode'] )
) {
$typography_block_styles['writingMode'] = isset( $block_attributes['style']['typography']['writingMode'] )
? $block_attributes['style']['typography']['writingMode']
: null;
}
$attributes = array();
$classnames = array();
$styles = wp_style_engine_get_styles(
array( 'typography' => $typography_block_styles ),
array( 'convert_vars_to_classnames' => true )
);
if ( ! empty( $styles['classnames'] ) ) {
$classnames[] = $styles['classnames'];
}
if ( $has_text_align_support && ! $should_skip_text_align && isset( $block_attributes['style']['typography']['textAlign'] ) ) {
$classnames[] = 'has-text-align-' . $block_attributes['style']['typography']['textAlign'];
}
if ( ! empty( $classnames ) ) {
$attributes['class'] = implode( ' ', $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 );
}
/**
* Renders typography styles/content to the block wrapper.
*
* @since 6.1.0
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @return string Filtered block content.
*/
function wp_render_typography_support( $block_content, $block ) {
if ( ! isset( $block['attrs']['style']['typography']['fontSize'] ) ) {
return $block_content;
}
$custom_font_size = $block['attrs']['style']['typography']['fontSize'];
$fluid_font_size = wp_get_typography_font_size_value( array( 'size' => $custom_font_size ) );
/*
* Checks that $fluid_font_size does not match $custom_font_size,
* which means it's been mutated by the fluid font size functions.
*/
if ( ! empty( $fluid_font_size ) && $fluid_font_size !== $custom_font_size ) {
// Replaces the first instance of `font-size:$custom_font_size` with `font-size:$fluid_font_size`.
return preg_replace( '/font-size\s*:\s*' . preg_quote( $custom_font_size, '/' ) . '\s*;?/', 'font-size:' . esc_attr( $fluid_font_size ) . ';', $block_content, 1 );
}
return $block_content;
}
/**
* Checks a string for a unit and value and returns an array
* consisting of `'value'` and `'unit'`, e.g. array( '42', 'rem' ).
*
* @since 6.1.0
*
* @param string|int|float $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 `array( '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 ( ! is_string( $raw_value ) && ! is_int( $raw_value ) && ! is_float( $raw_value ) ) {
_doing_it_wrong(
__FUNCTION__,
__( 'Raw size value must be a string, integer, or float.' ),
'6.1.0'
);
return null;
}
if ( empty( $raw_value ) ) {
return null;
}
// Converts numbers to pixel values by default.
if ( is_numeric( $raw_value ) ) {
$raw_value = $raw_value . 'px';
}
$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'];
}
/*
* No calculation is required if swapping between em and rem yet,
* since we assume a root size value. Later we might like to differentiate between
* :root font size (rem) and parent element font size (em) relativity.
*/
if ( ( 'em' === $options['coerce_to'] || 'rem' === $options['coerce_to'] ) && ( 'em' === $unit || 'rem' === $unit ) ) {
$unit = $options['coerce_to'];
}
return array(
'value' => round( $value, 3 ),
'unit' => $unit,
);
}
/**
* Internal implementation of CSS clamp() based on available min/max viewport
* width and min/max font sizes.
*
* @since 6.1.0
* @since 6.3.0 Checks for unsupported min/max viewport values that cause invalid clamp values.
* @since 6.5.0 Returns early when min and max viewport subtraction is zero to avoid division by zero.
* @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, otherwise 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;
// 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.
* @since 6.6.0 Deprecated bool argument $should_use_fluid_typography.
* @since 6.7.0 Font size presets can enable fluid typography individually, even if it’s disabled globally.
*
* @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|array $settings Optional Theme JSON settings array that overrides any global theme settings.
* 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, $settings = array() ) {
if ( ! isset( $preset['size'] ) ) {
return null;
}
/*
* Catches falsy values and 0/'0'. Fluid calculations cannot be performed on `0`.
* Also returns early when a preset font size explicitly disables fluid typography with `false`.
*/
$fluid_font_size_settings = $preset['fluid'] ?? null;
if ( false === $fluid_font_size_settings || empty( $preset['size'] ) ) {
return $preset['size'];
}
/*
* As a boolean (deprecated since 6.6), $settings acts as an override to switch fluid typography "on" (`true`) or "off" (`false`).
*/
if ( is_bool( $settings ) ) {
_deprecated_argument( __FUNCTION__, '6.6.0', __( '`boolean` type for second argument `$settings` is deprecated. Use `array()` instead.' ) );
$settings = array(
'typography' => array(
'fluid' => $settings,
),
);
}
// Fallback to global settings as default.
$global_settings = wp_get_global_settings();
$settings = wp_parse_args(
$settings,
$global_settings
);
$typography_settings = $settings['typography'] ?? array();
/*
* Return early when fluid typography is disabled in the settings, and there
* are no local settings to enable it for the individual preset.
*
* If this condition isn't met, either the settings or individual preset settings
* have enabled fluid typography.
*/
if ( empty( $typography_settings['fluid'] ) && empty( $fluid_font_size_settings ) ) {
return $preset['size'];
}
$fluid_settings = isset( $typography_settings['fluid'] ) ? $typography_settings['fluid'] : array();
$layout_settings = isset( $settings['layout'] ) ? $settings['layout'] : 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;
// 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',
)
);
التكنولوجيا تغزو الأعصاب..زراعة الشرائح الدماغية و مخاطرها – tahkoom.com
كتبت إيريني أنطون
لم يعد الذكاء الاصطناعي مجرد أداة تساعد الأطباء في التشخيص والعلاج، بل بات يمتد إلى أدمغتنا نفسها، فاتحًا الباب أمام إمكانيات غير مسبوقة، وأيضًا مخاوف وتساؤلات لا حصر لها. يعمل العلماء على تطوير شرائح تزرع داخل الدماغ، قادرة على إعادة الحركة لمرضى الشلل، وتحسين حالات الاكتئاب والقلق، بل وحتى استعادة الذاكرة لمن يعانون من أمراض مثل الزهايمر. فهل نحن على أعتاب ثورة طبية تعيد تشكيل قدراتنا العقلية؟ أم أن هذه التكنولوجيا قد تحمل مخاطر أكبر مما نتخيل؟
تكنولوجيا الشرائح الدماغية لا تزال في مراحلها الأولى عالميًا، وفي مصر بدأ الأطباء في متابعة أحدث التطورات العالمية في زراعة الشرائح الدماغية على أمل توفيرها لمرضى فقدان الحركة أو الاضطرابات النفسية.
“الشرائح الدماغية: أمل للمرضى”
قالت دكتورة ماريا ألفي، أخصائية أمراض مخ وأعصاب بالقصر العيني: “هذه الشرائح تُستخدم في علاج أمراض مثل الشلل، والشلل الرعاش، وبعض أمراض الذاكرة، والأمراض النفسية، والتشنجات، ويتم تطويرها لاستعادة الوظائف الحسية والحركية. ولكن حتى الآن، لن تصل هذه التكنولوجيا إلى مصر لأنها مازالت تحت التجارب والدراسات في الخارج”.
وأوضحت دكتورة ماريا ألفي أن هذه الشرائح تعمل على تسجيل الإشارات العصبية من الدماغ وتحويلها إلى أوامر للأجهزة المستخدمة مثل الأطراف الصناعية، فيتحكم بها المريض من خلال أفكاره. وأضافت أن هناك تجارب حاليًا لتحويل الإشارات العصبية المرتبطة بالكلام إلى نصوص أو أصوات، مما يعطي أملًا كبيرًا لمرضى فقدان النطق.
التحديات والمخاطر
قال الدكتور بولا جرجس، جراح مخ وأعصاب ونائب رئيس جراحة المخ والأعصاب بالقصر العيني سابقًا: “هناك تحديات تقنية وطبية تجعل هذه التكنولوجيا غير بديلة للعلاجات التقليدية في الوقت الحالي، لكنها يمكن أن تقلل من الحاجة للأدوية في بعض الحالات”.
وأوضح د. بولا جرجس أن لهذه الشرائح مضاعفات ومخاطر، من بينها تليف الأنسجة المحيطة بالشريحة، والنزيف الدماغي أثناء الجراحة أو بعدها، والعدوى التي قد تؤدي إلى إزالة الشريحة مع احتمالية حدوث اضطراب في كهرباء المخ. بالإضافة إلى أن هذه الشرائح قد تؤثر على المزاج والسلوك وتحدث تغيرات في التفكير والعاطفة.
مستقبل الشرائح الدماغية في مصر
أضاف د. بولا جرجس أن هناك مستشفيات متقدمة جدًا في مصر مثل القصر العيني، ومستشفى عين شمس التخصصي، ومعهد ناصر، قادرة على إجراء هذه العمليات بمجرد الانتهاء من مراحل البحث العالمية ووصول هذه التقنيات والأبحاث إلى مصر. وأوضح أن عمليات التحفيز العميق تُجرى في مصر لمرضى اضطرابات الحركة ومرضى باركنسون، لكن الشرائح لم تُستخدم حتى الآن.
واختتمت د. ماريا حديثها بقولها: “من المتوقع في المستقبل أن تصبح هذه الشرائح أكثر كفاءة، ويتم التحكم فيها لاسلكيًا، مما سيسمح للمرضى باستخدامها بسهولة أكبر. ودمجها بالذكاء الاصطناعي سيساعد في تفاعلها مع الإشارات العصبية، مما يجعلها أكثر دقة وفعالية”.
لا شك أن الشرائح الدماغية تمثل قفزة هائلة في عالم الطب العصبي، وقد تحمل مستقبلاً مشرقًا لملايين المرضى حول العالم. ومع ذلك، فإن التحديات التقنية والطبية لا تزال قائمة، مما يجعل هذه التكنولوجيا بحاجة إلى مزيد من الأبحاث قبل أن تصبح متاحة على نطاق واسع.
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