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<?php |
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/** |
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* Server-side rendering of the `core/image` block. |
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* |
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* @package WordPress |
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*/ |
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|
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/** |
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* Renders the `core/image` block on the server, |
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* adding a data-id attribute to the element if core/gallery has added on pre-render. |
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* |
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* @since 5.9.0 |
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* |
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* @param array $attributes The block attributes. |
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* @param string $content The block content. |
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* @param WP_Block $block The block object. |
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* |
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* @return string The block content with the data-id attribute added. |
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*/ |
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function gutenberg_render_block_core_image( $attributes, $content, $block ) { |
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if ( false === stripos( $content, '<img' ) ) { |
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return ''; |
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} |
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|
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$processor = new class( $content ) extends WP_HTML_Tag_Processor { |
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/** |
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* Return input span for an empty FIGCAPTION element. |
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* |
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* Returns span of input for an empty FIGCAPTION, if currently matched on a |
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* FIGCAPTION opening tag and if the element is properly closed and empty. |
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* |
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* @since 6.9.0 |
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* |
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* @return WP_HTML_Span|false Span of input if the element is empty; otherwise false. |
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*/ |
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public function block_core_image_extract_empty_figcaption_element() { |
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$this->set_bookmark( 'here' ); |
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$opener = $this->bookmarks['here']; |
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|
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// Allow comments within the definition of “empty.” |
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while ( $this->next_token() && '#comment' === $this->get_token_name() ) { |
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continue; |
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} |
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|
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if ( 'FIGCAPTION' !== $this->get_tag() || ! $this->is_tag_closer() ) { |
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return false; |
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} |
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|
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$this->set_bookmark( 'here' ); |
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$closer = $this->bookmarks['here']; |
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|
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return new WP_HTML_Span( $opener->start, $closer->start + $closer->length - $opener->start ); |
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} |
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}; |
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|
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if ( ! $processor->next_tag( 'img' ) || ! $processor->get_attribute( 'src' ) ) { |
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return ''; |
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} |
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|
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$has_id_binding = isset( $attributes['metadata']['bindings']['id'] ) && isset( $attributes['id'] ); |
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|
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// Ensure the `wp-image-id` classname on the image block supports block bindings. |
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if ( $has_id_binding ) { |
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// If there's a mismatch with the 'wp-image-' class and the actual id, the id was |
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// probably overridden by block bindings. Update it to the correct value. |
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// See https://github.com/WordPress/gutenberg/issues/62886 for why this is needed. |
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$id = $attributes['id']; |
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$image_classnames = $processor->get_attribute( 'class' ); |
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$class_with_binding_value = "wp-image-$id"; |
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if ( is_string( $image_classnames ) && ! str_contains( $image_classnames, $class_with_binding_value ) ) { |
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$image_classnames = preg_replace( '/wp-image-(\d+)/', $class_with_binding_value, $image_classnames ); |
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$processor->set_attribute( 'class', $image_classnames ); |
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} |
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} |
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|
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// For backwards compatibility, the data-id html attribute is only set for |
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// image blocks nested in a gallery. Detect if the image is in a gallery by |
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// checking the data-id attribute. |
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// See the `block_core_gallery_data_id_backcompatibility` function. |
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if ( isset( $attributes['data-id'] ) ) { |
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// If there's a binding for the `id`, the `id` attribute is used for the |
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// value, since `data-id` does not support block bindings. |
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// Else the `data-id` is used for backwards compatibility, since |
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// third parties may be filtering its value. |
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$data_id = $has_id_binding ? $attributes['id'] : $attributes['data-id']; |
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$processor->set_attribute( 'data-id', $data_id ); |
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} |
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|
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/* |
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* If the `caption` attribute is empty and we encounter a `<figcaption>` element, |
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* we take note of its span so we can remove it later. |
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*/ |
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if ( $processor->next_tag( 'FIGCAPTION' ) && empty( $attributes['caption'] ) ) { |
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$figcaption_span = $processor->block_core_image_extract_empty_figcaption_element(); |
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} |
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|
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$link_destination = $attributes['linkDestination'] ?? 'none'; |
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$lightbox_settings = gutenberg_block_core_image_get_lightbox_settings( $block->parsed_block ); |
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|
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/* |
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* If the lightbox is enabled and the image is not linked, adds the filter and |
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* the JavaScript view file. |
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*/ |
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if ( |
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isset( $lightbox_settings ) && |
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'none' === $link_destination && |
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isset( $lightbox_settings['enabled'] ) && |
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true === $lightbox_settings['enabled'] |
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) { |
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wp_enqueue_script_module( '@wordpress/block-library/image/view' ); |
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|
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/* |
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* This render needs to happen in a filter with priority 15 to ensure that |
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* it runs after the duotone filter and that duotone styles are applied to |
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* the image in the lightbox. Lightbox has to work with any plugins that |
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* might use filters as well. Removing this can be considered in the future |
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* if the way the blocks are rendered changes, or if a new kind of filter is |
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* introduced. |
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*/ |
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add_filter( 'render_block_core/image', 'gutenberg_block_core_image_render_lightbox', 15, 3 ); |
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} else { |
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/* |
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* Remove the filter if previously added by other Image blocks. |
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*/ |
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remove_filter( 'render_block_core/image', 'gutenberg_block_core_image_render_lightbox', 15 ); |
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} |
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|
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$output = $processor->get_updated_html(); |
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if ( ! empty( $figcaption_span ) ) { |
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return substr( $output, 0, $figcaption_span->start ) . substr( $output, $figcaption_span->start + $figcaption_span->length ); |
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} |
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return $output; |
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} |
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|
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/** |
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* Adds the lightboxEnabled flag to the block data. |
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* |
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* This is used to determine whether the lightbox should be rendered or not. |
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* |
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* @since 6.4.0 |
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* |
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* @param array $block Block data. |
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* |
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* @return array|null Filtered block data. |
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*/ |
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function gutenberg_block_core_image_get_lightbox_settings( $block ) { |
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// Gets the lightbox setting from the block attributes. |
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if ( isset( $block['attrs']['lightbox'] ) ) { |
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$lightbox_settings = $block['attrs']['lightbox']; |
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} |
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|
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if ( ! isset( $lightbox_settings ) ) { |
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$lightbox_settings = gutenberg_get_global_settings( array( 'lightbox' ), array( 'block_name' => 'core/image' ) ); |
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|
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// If not present in global settings, check the top-level global settings. |
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// |
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// NOTE: If no block-level settings are found, the previous call to |
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// `gutenberg_get_global_settings` will return the whole `theme.json` structure in |
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// which case we can check if the "lightbox" key is present at the top-level |
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// of the global settings and use its value. |
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if ( isset( $lightbox_settings['lightbox'] ) ) { |
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$lightbox_settings = gutenberg_get_global_settings( array( 'lightbox' ) ); |
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} |
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} |
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|
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return $lightbox_settings ?? null; |
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} |
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|
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/** |
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* Adds the directives and layout needed for the lightbox behavior. |
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* |
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* @since 6.4.0 |
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* |
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* @param string $block_content Rendered block content. |
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* @param array $block Block object. |
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* @param array $block_instance Block instance. |
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* |
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* @return string Filtered block content. |
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*/ |
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function gutenberg_block_core_image_render_lightbox( $block_content, $block, $block_instance ) { |
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/* |
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* If there's no IMG tag in the block then return the given block content |
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* as-is. There's nothing that this code can knowingly modify to add the |
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* lightbox behavior. |
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*/ |
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$processor = new WP_HTML_Tag_Processor( $block_content ); |
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|
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if ( $processor->next_tag( 'figure' ) ) { |
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$processor->set_bookmark( 'figure' ); |
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} |
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if ( ! $processor->next_tag( 'img' ) ) { |
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return $block_content; |
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} |
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|
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$alt = $processor->get_attribute( 'alt' ); |
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$img_uploaded_src = $processor->get_attribute( 'src' ); |
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$img_class_names = $processor->get_attribute( 'class' ); |
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$img_styles = $processor->get_attribute( 'style' ); |
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$img_width = 'none'; |
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$img_height = 'none'; |
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$img_srcset = false; |
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|
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wp_interactivity_config( |
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'core/image', |
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array( |
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'defaultAriaLabel' => __( 'Enlarged image' ), |
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'closeButtonText' => esc_html__( 'Close' ), |
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'prevButtonText' => esc_html__( 'Previous' ), |
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'nextButtonText' => esc_html__( 'Next' ), |
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) |
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); |
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|
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if ( $alt ) { |
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/* translators: %s: Image alt text. */ |
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$custom_aria_label = sprintf( __( 'Enlarged image: %s' ), $alt ); |
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} |
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|
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if ( isset( $block['attrs']['id'] ) ) { |
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$img_uploaded_src = wp_get_attachment_url( $block['attrs']['id'] ); |
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$img_metadata = wp_get_attachment_metadata( $block['attrs']['id'] ); |
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$has_dimensions = ( $img_metadata['width'] ?? '' ) && ( $img_metadata['height'] ?? '' ); |
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$srcset_size = $has_dimensions ? array( $img_metadata['width'], $img_metadata['height'] ) : 'large'; |
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$img_srcset = wp_get_attachment_image_srcset( $block['attrs']['id'], $srcset_size ); |
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$img_width = $img_metadata['width'] ?? 'none'; |
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$img_height = $img_metadata['height'] ?? 'none'; |
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} |
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|
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// Figure. |
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$processor->seek( 'figure' ); |
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$figure_class_names = $processor->get_attribute( 'class' ); |
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$figure_styles = $processor->get_attribute( 'style' ); |
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|
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// Create unique id and set the image metadata in the state. |
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$unique_image_id = uniqid(); |
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wp_interactivity_state( |
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'core/image', |
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array( |
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'metadata' => array( |
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$unique_image_id => array( |
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'uploadedSrc' => $img_uploaded_src, |
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'lightboxSrcset' => $img_srcset, |
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'figureClassNames' => $figure_class_names, |
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'figureStyles' => $figure_styles, |
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'imgClassNames' => $img_class_names, |
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'imgStyles' => $img_styles, |
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'targetWidth' => $img_width, |
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'targetHeight' => $img_height, |
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'scaleAttr' => $block['attrs']['scale'] ?? false, |
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'alt' => $alt, |
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'galleryId' => $block_instance->context['galleryId'] ?? null, |
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'customAriaLabel' => $custom_aria_label ?? null, |
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'navigationButtonType' => $block_instance->context['navigationButtonType'] ?? 'icon', |
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'triggerButtonAriaLabel' => null, |
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), |
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), |
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) |
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); |
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|
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$processor->add_class( 'wp-lightbox-container' ); |
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$processor->set_attribute( 'data-wp-interactive', 'core/image' ); |
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$processor->set_attribute( |
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'data-wp-context', |
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wp_json_encode( |
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array( 'imageId' => $unique_image_id ), |
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JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP |
| 266 |
) |
| 267 |
); |
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$processor->set_attribute( 'data-wp-key', $unique_image_id ); |
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|
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// Image. |
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$processor->next_tag( 'img' ); |
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$processor->set_attribute( 'data-wp-init', 'callbacks.setButtonStyles' ); |
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$processor->set_attribute( 'data-wp-on--load', 'callbacks.setButtonStyles' ); |
| 274 |
$processor->set_attribute( 'data-wp-on-window--resize', 'callbacks.setButtonStyles' ); |
| 275 |
|
| 276 |
// Set an event to preload the image on pointerenter and pointerdown(mobile). |
| 277 |
// Pointerleave is used to cancel the preload if the user hovers away from the image |
| 278 |
// before the predefined delay. |
| 279 |
$processor->set_attribute( 'data-wp-on--pointerenter', 'actions.preloadImageWithDelay' ); |
| 280 |
$processor->set_attribute( 'data-wp-on--pointerdown', 'actions.preloadImage' ); |
| 281 |
$processor->set_attribute( 'data-wp-on--pointerleave', 'actions.cancelPreload' ); |
| 282 |
|
| 283 |
// Sets an event callback on the `img` because the `figure` element can also |
| 284 |
// contain a caption, and we don't want to trigger the lightbox when the |
| 285 |
// caption is clicked. |
| 286 |
$processor->set_attribute( 'data-wp-on--click', 'actions.showLightbox' ); |
| 287 |
$processor->set_attribute( 'data-wp-class--hide', 'state.isContentHidden' ); |
| 288 |
$processor->set_attribute( 'data-wp-class--show', 'state.isContentVisible' ); |
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|
| 290 |
$body_content = $processor->get_updated_html(); |
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|
| 292 |
// Adds a button alongside image in the body content. |
| 293 |
$img = null; |
| 294 |
preg_match( '/<img[^>]+>/', $body_content, $img ); |
| 295 |
|
| 296 |
$button = |
| 297 |
$img[0] |
| 298 |
. '<button |
| 299 |
class="lightbox-trigger" |
| 300 |
type="button" |
| 301 |
aria-haspopup="dialog" |
| 302 |
data-wp-bind--aria-label="state.thisImage.triggerButtonAriaLabel" |
| 303 |
data-wp-init="callbacks.initTriggerButton" |
| 304 |
data-wp-on--click="actions.showLightbox" |
| 305 |
data-wp-style--right="state.thisImage.buttonRight" |
| 306 |
data-wp-style--top="state.thisImage.buttonTop" |
| 307 |
> |
| 308 |
<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" viewBox="0 0 12 12"> |
| 309 |
<path fill="#fff" d="M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z" /> |
| 310 |
</svg> |
| 311 |
</button>'; |
| 312 |
|
| 313 |
$body_content = preg_replace( '/<img[^>]+>/', $button, $body_content ); |
| 314 |
|
| 315 |
add_action( 'wp_footer', 'gutenberg_block_core_image_print_lightbox_overlay' ); |
| 316 |
|
| 317 |
return $body_content; |
| 318 |
} |
| 319 |
|
| 320 |
/** |
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* @since 6.5.0 |
| 322 |
*/ |
| 323 |
function gutenberg_block_core_image_print_lightbox_overlay() { |
| 324 |
$dialog_label = esc_attr__( 'Enlarged images' ); |
| 325 |
$close_button_text = esc_attr__( 'Close' ); |
| 326 |
$prev_button_text = esc_attr__( 'Previous' ); |
| 327 |
$next_button_text = esc_attr__( 'Next' ); |
| 328 |
$close_button_icon = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="20" height="20" aria-hidden="true" focusable="false"><path d="m13.06 12 6.47-6.47-1.06-1.06L12 10.94 5.53 4.47 4.47 5.53 10.94 12l-6.47 6.47 1.06 1.06L12 13.06l6.47 6.47 1.06-1.06L13.06 12Z"></path></svg>'; |
| 329 |
$prev_button_icon = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="28" height="28" aria-hidden="true" focusable="false"><path d="M14.6 7l-1.2-1L8 12l5.4 6 1.2-1-4.6-5z"></path></svg>'; |
| 330 |
$next_button_icon = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="28" height="28" aria-hidden="true" focusable="false"><path d="M10.6 6L9.4 7l4.6 5-4.6 5 1.2 1 5.4-6z"></path></svg>'; |
| 331 |
|
| 332 |
// If the current theme does NOT have a `theme.json`, or the colors are not |
| 333 |
// defined, it needs to set the background color & close button color to some |
| 334 |
// default values because it can't get them from the Global Styles. |
| 335 |
$background_color = '#fff'; |
| 336 |
$close_button_color = '#000'; |
| 337 |
if ( wp_theme_has_theme_json() ) { |
| 338 |
$global_styles_color = wp_get_global_styles( array( 'color' ) ); |
| 339 |
if ( ! empty( $global_styles_color['background'] ) ) { |
| 340 |
$background_color = esc_attr( $global_styles_color['background'] ); |
| 341 |
} |
| 342 |
if ( ! empty( $global_styles_color['text'] ) ) { |
| 343 |
$close_button_color = esc_attr( $global_styles_color['text'] ); |
| 344 |
} |
| 345 |
} |
| 346 |
|
| 347 |
echo <<<HTML |
| 348 |
<div |
| 349 |
class="wp-lightbox-overlay zoom" |
| 350 |
aria-label="{$dialog_label}" |
| 351 |
data-wp-interactive="core/image" |
| 352 |
data-wp-router-region='{ "id": "core/image-overlay", "attachTo": "body" }' |
| 353 |
data-wp-key="wp-lightbox-overlay" |
| 354 |
data-wp-context='{}' |
| 355 |
data-wp-bind--role="state.roleAttribute" |
| 356 |
data-wp-bind--aria-label="state.ariaLabel" |
| 357 |
data-wp-bind--aria-modal="state.ariaModal" |
| 358 |
data-wp-class--active="state.overlayEnabled" |
| 359 |
data-wp-class--show-closing-animation="state.overlayOpened" |
| 360 |
data-wp-watch---focus="callbacks.setOverlayFocus" |
| 361 |
data-wp-watch---inert="callbacks.setInertElements" |
| 362 |
data-wp-on--keydown="actions.handleKeydown" |
| 363 |
data-wp-on--touchstart="actions.handleTouchStart" |
| 364 |
data-wp-on--touchmove="actions.handleTouchMove" |
| 365 |
data-wp-on--touchend="actions.handleTouchEnd" |
| 366 |
data-wp-on--click="actions.hideLightbox" |
| 367 |
data-wp-on-window--resize="callbacks.setOverlayStyles" |
| 368 |
data-wp-on-window--scroll="actions.handleScroll" |
| 369 |
data-wp-bind--style="state.overlayStyles" |
| 370 |
tabindex="-1" |
| 371 |
> |
| 372 |
<button type="button" style="fill:{$close_button_color}" class="wp-lightbox-close-button" data-wp-bind--aria-label="state.closeButtonAriaLabel"> |
| 373 |
<span class="wp-lightbox-close-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$close_button_icon}</span> |
| 374 |
<span class="wp-lightbox-close-text" data-wp-bind--hidden="!state.hasNavigationText">{$close_button_text}</span> |
| 375 |
</button> |
| 376 |
<button type="button" style="fill:{$close_button_color}" class="wp-lightbox-navigation-button wp-lightbox-navigation-button-prev" data-wp-bind--hidden="!state.hasNavigation" data-wp-on--click="actions.showPreviousImage" data-wp-bind--aria-label="state.prevButtonAriaLabel"> |
| 377 |
<span class="wp-lightbox-navigation-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$prev_button_icon}</span> |
| 378 |
<span class="wp-lightbox-navigation-text" data-wp-bind--hidden="!state.hasNavigationText">{$prev_button_text}</span> |
| 379 |
</button> |
| 380 |
<div class="lightbox-image-container"> |
| 381 |
<figure data-wp-bind--class="state.selectedImage.figureClassNames" data-wp-bind--style="state.figureStyles"> |
| 382 |
<img data-wp-bind--alt="state.selectedImage.alt" data-wp-bind--class="state.selectedImage.imgClassNames" data-wp-bind--style="state.imgStyles" data-wp-bind--src="state.selectedImage.currentSrc"> |
| 383 |
</figure> |
| 384 |
</div> |
| 385 |
<div class="lightbox-image-container"> |
| 386 |
<figure data-wp-bind--class="state.selectedImage.figureClassNames" data-wp-bind--style="state.figureStyles"> |
| 387 |
<img |
| 388 |
data-wp-bind--alt="state.selectedImage.alt" |
| 389 |
data-wp-bind--class="state.selectedImage.imgClassNames" |
| 390 |
data-wp-bind--style="state.imgStyles" |
| 391 |
data-wp-bind--src="state.enlargedSrc" |
| 392 |
data-wp-bind--srcset="state.enlargedSrcset" |
| 393 |
data-wp-bind--srcset="state.enlargedSrcset" |
| 394 |
sizes="100vw" |
| 395 |
> |
| 396 |
</figure> |
| 397 |
</div> |
| 398 |
<button type="button" style="fill:{$close_button_color}" class="wp-lightbox-navigation-button wp-lightbox-navigation-button-next" data-wp-bind--hidden="!state.hasNavigation" data-wp-on--click="actions.showNextImage" data-wp-bind--aria-label="state.nextButtonAriaLabel"> |
| 399 |
<span class="wp-lightbox-navigation-text" data-wp-bind--hidden="!state.hasNavigationText">{$next_button_text}</span> |
| 400 |
<span class="wp-lightbox-navigation-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$next_button_icon}</span> |
| 401 |
</button> |
| 402 |
<div data-wp-text="state.ariaLabel" aria-live="polite" aria-atomic="true" class="screen-reader-text"></div> |
| 403 |
<div class="scrim" style="background-color: {$background_color}" aria-hidden="true"></div> |
| 404 |
</div> |
| 405 |
HTML; |
| 406 |
} |
| 407 |
|
| 408 |
/** |
| 409 |
* Registers the `core/image` block on server. |
| 410 |
* |
| 411 |
* @since 5.9.0 |
| 412 |
*/ |
| 413 |
function gutenberg_register_block_core_image() { |
| 414 |
register_block_type_from_metadata( |
| 415 |
__DIR__ . '/image', |
| 416 |
array( |
| 417 |
'render_callback' => 'gutenberg_render_block_core_image', |
| 418 |
) |
| 419 |
); |
| 420 |
} |
| 421 |
add_action( 'init', 'gutenberg_register_block_core_image', 20 ); |
| 422 |
|
