<?php

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/**

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* Server-side rendering of the `core/home-link` block.

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*

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* @package WordPress

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*/

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/**

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* Build an array with CSS classes and inline styles defining the colors

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* which will be applied to the home link markup in the front-end.

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*

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* @since 6.0.0

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*

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* @param array $context home link block context.

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* @return array Colors CSS classes and inline styles.

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*/

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function block_core_home_link_build_css_colors( $context ) {

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$colors = array(

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'css_classes' => array(),

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'inline_styles' => '',

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);

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// Text color.

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$has_named_text_color = array_key_exists( 'textColor', $context );

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$has_custom_text_color = isset( $context['style']['color']['text'] );

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// If has text color.

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if ( $has_custom_text_color || $has_named_text_color ) {

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// Add has-text-color class.

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$colors['css_classes'][] = 'has-text-color';

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}

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if ( $has_named_text_color ) {

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// Add the color class.

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$colors['css_classes'][] = sprintf( 'has-%s-color', $context['textColor'] );

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} elseif ( $has_custom_text_color ) {

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// Add the custom color inline style.

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$colors['inline_styles'] .= sprintf( 'color: %s;', $context['style']['color']['text'] );

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}

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// Background color.

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$has_named_background_color = array_key_exists( 'backgroundColor', $context );

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$has_custom_background_color = isset( $context['style']['color']['background'] );

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// If has background color.

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if ( $has_custom_background_color || $has_named_background_color ) {

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// Add has-background class.

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$colors['css_classes'][] = 'has-background';

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}

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if ( $has_named_background_color ) {

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// Add the background-color class.

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$colors['css_classes'][] = sprintf( 'has-%s-background-color', $context['backgroundColor'] );

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} elseif ( $has_custom_background_color ) {

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// Add the custom background-color inline style.

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$colors['inline_styles'] .= sprintf( 'background-color: %s;', $context['style']['color']['background'] );

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}

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return $colors;

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}

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/**

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* Build an array with CSS classes and inline styles defining the font sizes

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* which will be applied to the home link markup in the front-end.

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*

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* @since 6.0.0

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*

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* @param array $context Home link block context.

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* @return array Font size CSS classes and inline styles.

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*/

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function block_core_home_link_build_css_font_sizes( $context ) {

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// CSS classes.

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$font_sizes = array(

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'css_classes' => array(),

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'inline_styles' => '',

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);

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$has_named_font_size = array_key_exists( 'fontSize', $context );

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$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );

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if ( $has_named_font_size ) {

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// Add the font size class.

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$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );

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} elseif ( $has_custom_font_size ) {

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// Add the custom font size inline style.

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$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );

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}

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return $font_sizes;

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}

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/**

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* Builds an array with classes and style for the li wrapper

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*

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* @since 6.0.0

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*

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* @param array $context Home link block context.

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* @return string The li wrapper attributes.

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*/

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function block_core_home_link_build_li_wrapper_attributes( $context ) {

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$colors = block_core_home_link_build_css_colors( $context );

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$font_sizes = block_core_home_link_build_css_font_sizes( $context );

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$classes = array_merge(

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$colors['css_classes'],

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$font_sizes['css_classes']

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);

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$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );

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$classes[] = 'wp-block-navigation-item';

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if ( is_front_page() ) {

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$classes[] = 'current-menu-item';

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} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {

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// Edge case where the Reading settings has a posts page set but not a static homepage.

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$classes[] = 'current-menu-item';

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}

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$wrapper_attributes = get_block_wrapper_attributes(

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array(

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'class' => implode( ' ', $classes ),

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'style' => $style_attribute,

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)

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);

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return $wrapper_attributes;

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}

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/**

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* Renders the `core/home-link` block.

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*

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* @since 6.0.0

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*

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* @param array $attributes The block attributes.

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* @param string $content The saved content.

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* @param WP_Block $block The parsed block.

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*

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* @return string Returns the post content with the home url added.

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*/

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function render_block_core_home_link( $attributes, $content, $block ) {

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if ( empty( $attributes['label'] ) ) {

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$attributes['label'] = __( 'Home' );

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}

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$aria_current = '';

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if ( is_front_page() ) {

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$aria_current = ' aria-current="page"';

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} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {

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// Edge case where the Reading settings has a posts page set but not a static homepage.

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$aria_current = ' aria-current="page"';

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}

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return sprintf(

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'<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>',

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block_core_home_link_build_li_wrapper_attributes( $block->context ),

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esc_url( home_url() ),

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$aria_current,

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wp_kses_post( $attributes['label'] )

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);

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}

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/**

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* Register the home block

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*

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* @since 6.0.0

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*

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* @uses render_block_core_home_link()

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* @throws WP_Error An WP_Error exception parsing the block definition.

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*/

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function register_block_core_home_link() {

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register_block_type_from_metadata(

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__DIR__ . '/home-link',

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array(

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'render_callback' => 'render_block_core_home_link',

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)

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);

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}

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add_action( 'init', 'register_block_core_home_link' );

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