1<?php
  2/**
  3 * Server-side rendering of the `core/navigation-submenu` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Build an array with CSS classes and inline styles defining the font sizes
 10 * which will be applied to the navigation markup in the front-end.
 11 *
 12 * @since 5.9.0
 13 *
 14 * @param  array $context Navigation block context.
 15 * @return array Font size CSS classes and inline styles.
 16 */
 17function block_core_navigation_submenu_build_css_font_sizes( $context ) {
 18	// CSS classes.
 19	$font_sizes = array(
 20		'css_classes'   => array(),
 21		'inline_styles' => '',
 22	);
 23
 24	$has_named_font_size  = array_key_exists( 'fontSize', $context );
 25	$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
 26
 27	if ( $has_named_font_size ) {
 28		// Add the font size class.
 29		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
 30	} elseif ( $has_custom_font_size ) {
 31		// Add the custom font size inline style.
 32		$font_sizes['inline_styles'] = sprintf(
 33			'font-size: %s;',
 34			wp_get_typography_font_size_value(
 35				array(
 36					'size' => $context['style']['typography']['fontSize'],
 37				)
 38			)
 39		);
 40	}
 41
 42	return $font_sizes;
 43}
 44
 45/**
 46 * Returns the top-level submenu SVG chevron icon.
 47 *
 48 * @since 5.9.0
 49 *
 50 * @return string
 51 */
 52function block_core_navigation_submenu_render_submenu_icon() {
 53	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';
 54}
 55
 56/**
 57 * Renders the `core/navigation-submenu` block.
 58 *
 59 * @since 5.9.0
 60 *
 61 * @param array    $attributes The block attributes.
 62 * @param string   $content    The saved content.
 63 * @param WP_Block $block      The parsed block.
 64 *
 65 * @return string Returns the post content with the legacy widget added.
 66 */
 67function render_block_core_navigation_submenu( $attributes, $content, $block ) {
 68	$navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );
 69	$is_post_type           = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];
 70	$is_post_type           = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );
 71
 72	// Don't render the block's subtree if it is a draft.
 73	if ( $is_post_type && $navigation_link_has_id && 'publish' !== get_post_status( $attributes['id'] ) ) {
 74		return '';
 75	}
 76
 77	// Don't render the block's subtree if it has no label.
 78	if ( empty( $attributes['label'] ) ) {
 79		return '';
 80	}
 81
 82	$font_sizes      = block_core_navigation_submenu_build_css_font_sizes( $block->context );
 83	$style_attribute = $font_sizes['inline_styles'];
 84
 85	$has_submenu = count( $block->inner_blocks ) > 0;
 86	$kind        = empty( $attributes['kind'] ) ? 'post_type' : str_replace( '-', '_', $attributes['kind'] );
 87	$is_active   = ! empty( $attributes['id'] ) && get_queried_object_id() === (int) $attributes['id'] && ! empty( get_queried_object()->$kind );
 88
 89	if ( is_post_type_archive() && ! empty( $attributes['url'] ) ) {
 90		$queried_archive_link = get_post_type_archive_link( get_queried_object()->name );
 91		if ( $attributes['url'] === $queried_archive_link ) {
 92			$is_active = true;
 93		}
 94	}
 95
 96	$show_submenu_indicators = isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'];
 97	$open_on_click           = isset( $block->context['openSubmenusOnClick'] ) && $block->context['openSubmenusOnClick'];
 98	$open_on_hover_and_click = isset( $block->context['openSubmenusOnClick'] ) && ! $block->context['openSubmenusOnClick'] &&
 99		$show_submenu_indicators;
100
101	$classes = array(
102		'wp-block-navigation-item',
103	);
104	$classes = array_merge(
105		$classes,
106		$font_sizes['css_classes']
107	);
108	if ( $has_submenu ) {
109		$classes[] = 'has-child';
110	}
111	if ( $open_on_click ) {
112		$classes[] = 'open-on-click';
113	}
114	if ( $open_on_hover_and_click ) {
115		$classes[] = 'open-on-hover-click';
116	}
117	if ( $is_active ) {
118		$classes[] = 'current-menu-item';
119	}
120
121	$wrapper_attributes = get_block_wrapper_attributes(
122		array(
123			'class' => implode( ' ', $classes ),
124			'style' => $style_attribute,
125		)
126	);
127
128	$label = '';
129
130	if ( isset( $attributes['label'] ) ) {
131		$label .= wp_kses_post( $attributes['label'] );
132	}
133
134	$aria_label = sprintf(
135		/* translators: Accessibility text. %s: Parent page title. */
136		__( '%s submenu' ),
137		wp_strip_all_tags( $label )
138	);
139
140	$html = '<li ' . $wrapper_attributes . '>';
141
142	// If Submenus open on hover, we render an anchor tag with attributes.
143	// If submenu icons are set to show, we also render a submenu button, so the submenu can be opened on click.
144	if ( ! $open_on_click ) {
145		$item_url = isset( $attributes['url'] ) ? $attributes['url'] : '';
146		// Start appending HTML attributes to anchor tag.
147		$html .= '<a class="wp-block-navigation-item__content"';
148
149		// The href attribute on a and area elements is not required;
150		// when those elements do not have href attributes they do not create hyperlinks.
151		// But also The href attribute must have a value that is a valid URL potentially
152		// surrounded by spaces.
153		// see: https://html.spec.whatwg.org/multipage/links.html#links-created-by-a-and-area-elements.
154		if ( ! empty( $item_url ) ) {
155			$html .= ' href="' . esc_url( $item_url ) . '"';
156		}
157
158		if ( $is_active ) {
159			$html .= ' aria-current="page"';
160		}
161
162		if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {
163			$html .= ' target="_blank"  ';
164		}
165
166		if ( isset( $attributes['rel'] ) ) {
167			$html .= ' rel="' . esc_attr( $attributes['rel'] ) . '"';
168		} elseif ( isset( $attributes['nofollow'] ) && $attributes['nofollow'] ) {
169			$html .= ' rel="nofollow"';
170		}
171
172		if ( isset( $attributes['title'] ) ) {
173			$html .= ' title="' . esc_attr( $attributes['title'] ) . '"';
174		}
175
176		$html .= '>';
177		// End appending HTML attributes to anchor tag.
178
179		$html .= '<span class="wp-block-navigation-item__label">';
180		$html .= $label;
181		$html .= '</span>';
182
183		// Add description if available.
184		if ( ! empty( $attributes['description'] ) ) {
185			$html .= '<span class="wp-block-navigation-item__description">';
186			$html .= wp_kses_post( $attributes['description'] );
187			$html .= '</span>';
188		}
189
190		$html .= '</a>';
191		// End anchor tag content.
192
193		if ( $show_submenu_indicators ) {
194			// The submenu icon is rendered in a button here
195			// so that there's a clickable element to open the submenu.
196			$html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle" aria-expanded="false">' . block_core_navigation_submenu_render_submenu_icon() . '</button>';
197		}
198	} else {
199		// If menus open on click, we render the parent as a button.
200		$html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation-item__content wp-block-navigation-submenu__toggle" aria-expanded="false">';
201
202		// Wrap title with span to isolate it from submenu icon.
203		$html .= '<span class="wp-block-navigation-item__label">';
204
205		$html .= $label;
206
207		$html .= '</span>';
208
209		// Add description if available.
210		if ( ! empty( $attributes['description'] ) ) {
211			$html .= '<span class="wp-block-navigation-item__description">';
212			$html .= wp_kses_post( $attributes['description'] );
213			$html .= '</span>';
214		}
215
216		$html .= '</button>';
217
218		$html .= '<span class="wp-block-navigation__submenu-icon">' . block_core_navigation_submenu_render_submenu_icon() . '</span>';
219
220	}
221
222	if ( $has_submenu ) {
223		// Copy some attributes from the parent block to this one.
224		// Ideally this would happen in the client when the block is created.
225		if ( array_key_exists( 'overlayTextColor', $block->context ) ) {
226			$attributes['textColor'] = $block->context['overlayTextColor'];
227		}
228		if ( array_key_exists( 'overlayBackgroundColor', $block->context ) ) {
229			$attributes['backgroundColor'] = $block->context['overlayBackgroundColor'];
230		}
231		if ( array_key_exists( 'customOverlayTextColor', $block->context ) ) {
232			$attributes['style']['color']['text'] = $block->context['customOverlayTextColor'];
233		}
234		if ( array_key_exists( 'customOverlayBackgroundColor', $block->context ) ) {
235			$attributes['style']['color']['background'] = $block->context['customOverlayBackgroundColor'];
236		}
237
238		// This allows us to be able to get a response from wp_apply_colors_support.
239		$block->block_type->supports['color'] = true;
240		$colors_supports                      = wp_apply_colors_support( $block->block_type, $attributes );
241		$css_classes                          = 'wp-block-navigation__submenu-container';
242		if ( array_key_exists( 'class', $colors_supports ) ) {
243			$css_classes .= ' ' . $colors_supports['class'];
244		}
245
246		$style_attribute = '';
247		if ( array_key_exists( 'style', $colors_supports ) ) {
248			$style_attribute = $colors_supports['style'];
249		}
250
251		$inner_blocks_html = '';
252		foreach ( $block->inner_blocks as $inner_block ) {
253			$inner_blocks_html .= $inner_block->render();
254		}
255
256		if ( strpos( $inner_blocks_html, 'current-menu-item' ) ) {
257			$tag_processor = new WP_HTML_Tag_Processor( $html );
258			while ( $tag_processor->next_tag( array( 'class_name' => 'wp-block-navigation-item' ) ) ) {
259				$tag_processor->add_class( 'current-menu-ancestor' );
260			}
261			$html = $tag_processor->get_updated_html();
262		}
263
264		$wrapper_attributes = get_block_wrapper_attributes(
265			array(
266				'class' => $css_classes,
267				'style' => $style_attribute,
268			)
269		);
270
271		$html .= sprintf(
272			'<ul %s>%s</ul>',
273			$wrapper_attributes,
274			$inner_blocks_html
275		);
276
277	}
278
279	$html .= '</li>';
280
281	return $html;
282}
283
284/**
285 * Register the navigation submenu block.
286 *
287 * @since 5.9.0
288 *
289 * @uses render_block_core_navigation_submenu()
290 * @throws WP_Error An WP_Error exception parsing the block definition.
291 */
292function register_block_core_navigation_submenu() {
293	register_block_type_from_metadata(
294		__DIR__ . '/navigation-submenu',
295		array(
296			'render_callback' => 'render_block_core_navigation_submenu',
297		)
298	);
299}
300add_action( 'init', 'register_block_core_navigation_submenu' );
301