Editor: Merge latest fluid typography bugfixes for 6.1 Release Candidate 1.

Merges the following:
* [https://github.com/WordPress/gutenberg/pull/44761 Gutenberg PR 44761] - Fluid Typography: Fix bug in global styles where fluid `clamp()` rules were not calculated for custom values
* [https://github.com/WordPress/gutenberg/pull/44762 Gutenberg PR 44762] - Fluid Typography: Convert server-side block support values
* [https://github.com/WordPress/gutenberg/pull/44764 Gutenberg PR 44764] - Fluid Typography: Convert font size inline style attributes to fluid values
* [https://github.com/WordPress/gutenberg/pull/44807 Gutenberg PR 44807] - Fluid Typography: Covert font size number values to pixels
* [https://github.com/WordPress/gutenberg/pull/44847 Gutenberg PR 44847] - Fluid Typography: ensure font sizes are strings or integers

Follow-up to [54280].

Props andrewserong, isabel_brison, ramonopoly.
See #56467.
Built from https://develop.svn.wordpress.org/trunk@54497


git-svn-id: http://core.svn.wordpress.org/trunk@54056 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/block-supports/typography.php

@@ -119,7 +119,11 @@ function wp_apply_typography_support( $block_type, $block_attributes ) {
 		$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;
+			$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 ) {
@@ -245,28 +249,70 @@ function wp_typography_get_preset_inline_style_value( $style_value, $css_propert
 }
 
 /**
- * Checks a string for a unit and value and returns an array
+ * Renders typography styles/content to the block wrapper.
- * 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 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 `[ 'rem', 'px', 'em' ]`;
+ *     @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,
@@ -288,8 +334,10 @@ function wp_get_typography_value_and_unit( $raw_value, $options = array() ) {
 	$value = $matches[1];
 	$unit  = $matches[2];
 
-	// Default browser font size. Later, possibly could inject some JS to
+	/*
-	// compute this `getComputedStyle( document.querySelector( "html" ) ).fontSize`.
+	 * 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'];
@@ -323,7 +371,7 @@ function wp_get_typography_value_and_unit( $raw_value, $options = array() ) {
  *     @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.
+ * @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;
@@ -396,14 +444,26 @@ function wp_get_computed_fluid_typography_value( $args = array() ) {
  *     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           $slug Kebab-case, unique identifier for the font size preset.
- *     @type string $size CSS font-size value, including units where applicable.
+ *     @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`.
+ *                                           Default is false.
- * @return string Font-size value.
+ * @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.
 	$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;

wp-includes/class-wp-theme-json.php

@@ -1675,6 +1675,18 @@ class WP_Theme_JSON {
 				continue;
 			}
 
+			// Calculates fluid typography rules where available.
+			if ( 'font-size' === $css_property ) {
+				/*
+				 * wp_get_typography_font_size_value() will check
+				 * if fluid typography has been activated and also
+				 * whether the incoming value can be converted to a fluid value.
+				 * Values that already have a clamp() function will not pass the test,
+				 * and therefore the original $value will be returned.
+				 */
+				$value = wp_get_typography_font_size_value( array( 'size' => $value ) );
+			}
+
 			$declarations[] = array(
 				'name'  => $css_property,
 				'value' => $value,

wp-includes/default-filters.php

@@ -687,6 +687,9 @@ add_action( 'wp_footer', 'the_block_template_skip_link' );
 add_action( 'setup_theme', 'wp_enable_block_templates' );
 add_action( 'wp_loaded', '_add_template_loader_filters' );
 
+// Fluid typography.
+add_filter( 'render_block', 'wp_render_typography_support', 10, 2 );
+
 // User preferences.
 add_action( 'init', 'wp_register_persisted_preferences_meta' );
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-beta3-54496';
+$wp_version = '6.1-beta3-54497';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.