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<?php
/**
* Server-side rendering of the `core/home-link` block.
*
* @package WordPress
*/
/**
* Build an array with CSS classes and inline styles defining the colors
* which will be applied to the home link markup in the front-end.
*
* @since 6.0.0
*
* @param array $context home link block context.
* @return array Colors CSS classes and inline styles.
*/
function block_core_home_link_build_css_colors( $context ) {
$colors = array(
'css_classes' => array(),
'inline_styles' => '',
);
// Text color.
$has_named_text_color = array_key_exists( 'textColor', $context );
$has_custom_text_color = isset( $context['style']['color']['text'] );
// If has text color.
if ( $has_custom_text_color || $has_named_text_color ) {
// Add has-text-color class.
$colors['css_classes'][] = 'has-text-color';
}
if ( $has_named_text_color ) {
// Add the color class.
$colors['css_classes'][] = sprintf( 'has-%s-color', $context['textColor'] );
} elseif ( $has_custom_text_color ) {
// Add the custom color inline style.
$colors['inline_styles'] .= sprintf( 'color: %s;', $context['style']['color']['text'] );
}
// Background color.
$has_named_background_color = array_key_exists( 'backgroundColor', $context );
$has_custom_background_color = isset( $context['style']['color']['background'] );
// If has background color.
if ( $has_custom_background_color || $has_named_background_color ) {
// Add has-background class.
$colors['css_classes'][] = 'has-background';
}
if ( $has_named_background_color ) {
// Add the background-color class.
$colors['css_classes'][] = sprintf( 'has-%s-background-color', $context['backgroundColor'] );
} elseif ( $has_custom_background_color ) {
// Add the custom background-color inline style.
$colors['inline_styles'] .= sprintf( 'background-color: %s;', $context['style']['color']['background'] );
}
return $colors;
}
/**
* Build an array with CSS classes and inline styles defining the font sizes
* which will be applied to the home link markup in the front-end.
*
* @since 6.0.0
*
* @param array $context Home link block context.
* @return array Font size CSS classes and inline styles.
*/
function block_core_home_link_build_css_font_sizes( $context ) {
// CSS classes.
$font_sizes = array(
'css_classes' => array(),
'inline_styles' => '',
);
$has_named_font_size = array_key_exists( 'fontSize', $context );
$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
if ( $has_named_font_size ) {
// Add the font size class.
$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
} elseif ( $has_custom_font_size ) {
// Add the custom font size inline style.
$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );
}
return $font_sizes;
}
/**
* Builds an array with classes and style for the li wrapper
*
* @since 6.0.0
*
* @param array $context Home link block context.
* @return string The li wrapper attributes.
*/
function block_core_home_link_build_li_wrapper_attributes( $context ) {
$colors = block_core_home_link_build_css_colors( $context );
$font_sizes = block_core_home_link_build_css_font_sizes( $context );
$classes = array_merge(
$colors['css_classes'],
$font_sizes['css_classes']
);
$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );
$classes[] = 'wp-block-navigation-item';
if ( is_front_page() ) {
$classes[] = 'current-menu-item';
} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {
// Edge case where the Reading settings has a posts page set but not a static homepage.
$classes[] = 'current-menu-item';
}
$wrapper_attributes = get_block_wrapper_attributes(
array(
'class' => implode( ' ', $classes ),
'style' => $style_attribute,
)
);
return $wrapper_attributes;
}
/**
* Renders the `core/home-link` block.
*
* @since 6.0.0
*
* @param array $attributes The block attributes.
* @param string $content The saved content.
* @param WP_Block $block The parsed block.
*
* @return string Returns the post content with the home url added.
*/
function render_block_core_home_link( $attributes, $content, $block ) {
if ( empty( $attributes['label'] ) ) {
// Using a fallback for the label attribute allows rendering the block even if no attributes have been set,
// e.g. when using the block as a hooked block.
// Note that the fallback value needs to be kept in sync with the one set in `edit.js` (upon first loading the block in the editor).
$attributes['label'] = __( 'Home' );
}
$aria_current = '';
if ( is_front_page() ) {
$aria_current = ' aria-current="page"';
} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {
// Edge case where the Reading settings has a posts page set but not a static homepage.
$aria_current = ' aria-current="page"';
}
return sprintf(
'<li %1$s><a class="wp-block-home-link__content wp-block-navigation-item__content" href="%2$s" rel="home"%3$s>%4$s</a></li>',
block_core_home_link_build_li_wrapper_attributes( $block->context ),
esc_url( home_url() ),
$aria_current,
wp_kses_post( $attributes['label'] )
);
}
/**
* Register the home block
*
* @since 6.0.0
*
* @uses render_block_core_home_link()
* @throws WP_Error An WP_Error exception parsing the block definition.
*/
function register_block_core_home_link() {
register_block_type_from_metadata(
__DIR__ . '/home-link',
array(
'render_callback' => 'render_block_core_home_link',
)
);
}
add_action( 'init', 'register_block_core_home_link' );