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Enabling fluid type in theme.json
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Only allowing rem and px
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@ramonjd
ramonjd committed Mar 21, 2022
1 parent 670b4d9 commit e219cba
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Showing 3 changed files with 121 additions and 24 deletions.
78 changes: 54 additions & 24 deletions lib/block-supports/typography.php
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Original file line number Diff line number Diff line change
Expand Up @@ -206,48 +206,78 @@ function gutenberg_typography_get_css_variable_inline_style( $attributes, $featu
return sprintf( '%s:var(--wp--preset--%s--%s);', $css_property, $css_property, $slug );
}

/**
* Returns a font-size value based on a given font-size preset. If typography.fluid is enabled it will calculate clamp values.
*
* @param array $preset Duotone preset value as seen in theme.json.
* @return string Font-size value.
*/
function gutenberg_get_typography_font_size_value( $preset ) {
// This is where we'll keep options I guess.
// Comment out to show how things work.
$typography_settings = gutenberg_get_global_settings( array( 'typography' ) );

// if ( ! isset( $typography_settings['fluid'] ) ) {
// return $preset['size'];
// }

// Should be defined by theme.json, maybe take from layout?
$minimum_viewport_width = 640 / 16; // rem for now. 1200(px) / 16 to get rem.
$maximum_viewport_width = 1600 / 16; // Ditto.
// This is where we'll keep options I guess.
if ( ! isset( $typography_settings['fluid'] ) ) {
return $preset['size'];
}

/*
Up next;
- Challenge: looping through fontSizes and calculating clamp functions for every size relies preferably on rem/px or unitless values.
- Apply this to custom font-size values.
*/
// Up for discussion.
$default_unit = 'rem';
$default_minimum_viewport_width = '1600px';
$default_maximum_viewport_width = '650px';

// Matches rem or unitless values only.
// Matches rem or px values only.
$pattern = '/^(\d*\.?\d+)(rem|px)?$/';
preg_match_all( $pattern, $preset['size'], $matches );
// Could we also take these from layout? contentSize and wideSize?
$minimum_viewport_width = isset( $typography_settings['minViewportWidth'] ) ? $typography_settings['minViewportWidth'] : $default_minimum_viewport_width;
$minimum_viewport_width_unit = $default_unit;
$maximum_viewport_width = isset( $typography_settings['maxViewportWidth'] ) ? $typography_settings['maxViewportWidth'] : $default_maximum_viewport_width;
$maximum_viewport_width_unit = $default_unit;

// Minimum viewport size.
preg_match_all( $pattern, $minimum_viewport_width, $minimum_viewport_width_matches );
if ( isset( $minimum_viewport_width_matches[1][0] ) ) {
$minimum_viewport_width = intval( $minimum_viewport_width_matches[1][0] );
$minimum_viewport_width_unit = isset( $minimum_viewport_width_matches[2][0] ) ? $minimum_viewport_width_matches[2][0] : $minimum_viewport_width_unit;
if ( 'px' === $minimum_viewport_width_unit ) {
// Default is rem so we convert px to rem.
$minimum_viewport_width = $minimum_viewport_width / 16;
}
}

if ( isset( $matches[1][0] ) ) {
$base_value = intval( $matches[1][0] );
// Maximum viewport size.
preg_match_all( $pattern, $maximum_viewport_width, $maximum_viewport_width_matches );
if ( isset( $maximum_viewport_width_matches[1][0] ) ) {
$maximum_viewport_width = intval( $maximum_viewport_width_matches[1][0] );
$maximum_viewport_width_unit = isset( $maximum_viewport_width_matches[2][0] ) ? $maximum_viewport_width_matches[2][0] : $maximum_viewport_width_unit;
if ( 'px' === $maximum_viewport_width_unit ) {
// Default is rem so we convert px to rem.
$maximum_viewport_width = $maximum_viewport_width / 16;
}
}

if ( isset( $matches[2][0] ) && 'px' === $matches[2][0] ) {
// Calculate rem to px.
// Font sizes.
preg_match_all( $pattern, $preset['size'], $size_matches );
if ( isset( $size_matches[1][0] ) ) {
$base_size_value = $size_matches[1][0];

$base_value = $base_value / 16;
if ( isset( $size_matches[2][0] ) && 'px' === $size_matches[2][0] ) {
// Default is rem so we convert px to rem.
$base_size_value = $base_size_value / 16;
}

$minimum_font_size = $base_value * 1; // A min value should ideally be coming from theme.json.
$maximum_font_size = $base_value * 1.5; // Ditto on the max.
// How can we offer control over this?
// Maybe typography.fluid.{min|max}FontSizeFactor.
// Or picking the first and last sizes in the fontSizes array?
// Another option is here to accept fontSizes[0]['min'] and fontSizes[0]['max'] from a preset item.
$minimum_font_size = $base_size_value * 0.9;
$maximum_font_size = $base_size_value * 1.75;
$factor = ( 1 / ( $maximum_viewport_width - $minimum_viewport_width ) ) * ( $maximum_font_size - $minimum_font_size );
$calc_rem = $minimum_font_size - ( $minimum_viewport_width * $factor );
$calc_vw = 100 * $factor;
$min = min( $minimum_font_size, $maximum_font_size );
$max = max( $minimum_font_size, $maximum_font_size );

return "clamp({$min}rem, {$calc_rem}rem + {$calc_vw}vw, {$max}rem)";

} else {
return $preset['size'];
}
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53 changes: 53 additions & 0 deletions lib/compat/wordpress-6.0/class-wp-theme-json-gutenberg.php
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,59 @@ class WP_Theme_JSON_Gutenberg extends WP_Theme_JSON_5_9 {
'version',
);

/**
* The valid properties under the settings key.
*
* @var array
*/
const VALID_SETTINGS = array(
'appearanceTools' => null,
'border' => array(
'color' => null,
'radius' => null,
'style' => null,
'width' => null,
),
'color' => array(
'background' => null,
'custom' => null,
'customDuotone' => null,
'customGradient' => null,
'defaultDuotone' => null,
'defaultGradients' => null,
'defaultPalette' => null,
'duotone' => null,
'gradients' => null,
'link' => null,
'palette' => null,
'text' => null,
),
'custom' => null,
'layout' => array(
'contentSize' => null,
'wideSize' => null,
),
'spacing' => array(
'blockGap' => null,
'margin' => null,
'padding' => null,
'units' => null,
),
'typography' => array(
'customFontSize' => null,
'dropCap' => null,
'fontFamilies' => null,
'fontSizes' => null,
'fontStyle' => null,
'fontWeight' => null,
'fluid' => null,
'letterSpacing' => null,
'lineHeight' => null,
'textDecoration' => null,
'textTransform' => null,
),
);

/**
* Returns the current theme's wanted patterns(slugs) to be
* registered from Pattern Directory.
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14 changes: 14 additions & 0 deletions schemas/json/theme.json
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Original file line number Diff line number Diff line change
Expand Up @@ -253,6 +253,20 @@
"type": "boolean",
"default": true
},
"fluid": {
"description": "Enables fluid typography and allows users to set global fluid typography parameters.",
"type": "object",
"properties": {
"maxViewportWidth": {
"description": "Allow users to set custom a max viewport width.",
"type": "string"
},
"minViewportWidth": {
"description": "Allow users to set custom a min viewport width.",
"type": "string"
}
}
},
"letterSpacing": {
"description": "Allow users to set custom letter spacing.",
"type": "boolean",
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