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Editing: image.php
<?php /** * Server-side rendering of the `core/image` block. * * @package WordPress */ /** * Renders the `core/image` block on the server, * adding a data-id attribute to the element if core/gallery has added on pre-render. * * @since 5.9.0 * * @param array $attributes The block attributes. * @param string $content The block content. * @param WP_Block $block The block object. * * @return string The block content with the data-id attribute added. */ function render_block_core_image( $attributes, $content, $block ) { if ( false === stripos( $content, '<img' ) ) { return ''; } $processor = new class( $content ) extends WP_HTML_Tag_Processor { /** * Return input span for an empty FIGCAPTION element. * * Returns span of input for an empty FIGCAPTION, if currently matched on a * FIGCAPTION opening tag and if the element is properly closed and empty. * * @since 6.9.0 * * @return WP_HTML_Span|false Span of input if the element is empty; otherwise false. */ public function block_core_image_extract_empty_figcaption_element() { $this->set_bookmark( 'here' ); $opener = $this->bookmarks['here']; // Allow comments within the definition of “empty.” while ( $this->next_token() && '#comment' === $this->get_token_name() ) { continue; } if ( 'FIGCAPTION' !== $this->get_tag() || ! $this->is_tag_closer() ) { return false; } $this->set_bookmark( 'here' ); $closer = $this->bookmarks['here']; return new WP_HTML_Span( $opener->start, $closer->start + $closer->length - $opener->start ); } }; if ( ! $processor->next_tag( 'img' ) || ! $processor->get_attribute( 'src' ) ) { return ''; } $has_id_binding = isset( $attributes['metadata']['bindings']['id'] ) && isset( $attributes['id'] ); // Ensure the `wp-image-id` classname on the image block supports block bindings. if ( $has_id_binding ) { // If there's a mismatch with the 'wp-image-' class and the actual id, the id was // probably overridden by block bindings. Update it to the correct value. // See https://github.com/WordPress/gutenberg/issues/62886 for why this is needed. $id = $attributes['id']; $image_classnames = $processor->get_attribute( 'class' ); $class_with_binding_value = "wp-image-$id"; if ( is_string( $image_classnames ) && ! str_contains( $image_classnames, $class_with_binding_value ) ) { $image_classnames = preg_replace( '/wp-image-(\d+)/', $class_with_binding_value, $image_classnames ); $processor->set_attribute( 'class', $image_classnames ); } } // For backwards compatibility, the data-id html attribute is only set for // image blocks nested in a gallery. Detect if the image is in a gallery by // checking the data-id attribute. // See the `block_core_gallery_data_id_backcompatibility` function. if ( isset( $attributes['data-id'] ) ) { // If there's a binding for the `id`, the `id` attribute is used for the // value, since `data-id` does not support block bindings. // Else the `data-id` is used for backwards compatibility, since // third parties may be filtering its value. $data_id = $has_id_binding ? $attributes['id'] : $attributes['data-id']; $processor->set_attribute( 'data-id', $data_id ); } /* * If the `caption` attribute is empty and we encounter a `<figcaption>` element, * we take note of its span so we can remove it later. */ if ( $processor->next_tag( 'FIGCAPTION' ) && empty( $attributes['caption'] ) ) { $figcaption_span = $processor->block_core_image_extract_empty_figcaption_element(); } $link_destination = $attributes['linkDestination'] ?? 'none'; $lightbox_settings = block_core_image_get_lightbox_settings( $block->parsed_block ); /* * If the lightbox is enabled and the image is not linked, adds the filter and * the JavaScript view file. */ if ( isset( $lightbox_settings ) && 'none' === $link_destination && isset( $lightbox_settings['enabled'] ) && true === $lightbox_settings['enabled'] ) { wp_enqueue_script_module( '@wordpress/block-library/image/view' ); /* * This render needs to happen in a filter with priority 15 to ensure that * it runs after the duotone filter and that duotone styles are applied to * the image in the lightbox. Lightbox has to work with any plugins that * might use filters as well. Removing this can be considered in the future * if the way the blocks are rendered changes, or if a new kind of filter is * introduced. */ add_filter( 'render_block_core/image', 'block_core_image_render_lightbox', 15, 3 ); } else { /* * Remove the filter if previously added by other Image blocks. */ remove_filter( 'render_block_core/image', 'block_core_image_render_lightbox', 15 ); } $output = $processor->get_updated_html(); if ( ! empty( $figcaption_span ) ) { return substr( $output, 0, $figcaption_span->start ) . substr( $output, $figcaption_span->start + $figcaption_span->length ); } return $output; } /** * Adds the lightboxEnabled flag to the block data. * * This is used to determine whether the lightbox should be rendered or not. * * @since 6.4.0 * * @param array $block Block data. * * @return array|null Filtered block data. */ function block_core_image_get_lightbox_settings( $block ) { // Gets the lightbox setting from the block attributes. if ( isset( $block['attrs']['lightbox'] ) ) { $lightbox_settings = $block['attrs']['lightbox']; } if ( ! isset( $lightbox_settings ) ) { $lightbox_settings = wp_get_global_settings( array( 'lightbox' ), array( 'block_name' => 'core/image' ) ); // If not present in global settings, check the top-level global settings. // // NOTE: If no block-level settings are found, the previous call to // `wp_get_global_settings` will return the whole `theme.json` structure in // which case we can check if the "lightbox" key is present at the top-level // of the global settings and use its value. if ( isset( $lightbox_settings['lightbox'] ) ) { $lightbox_settings = wp_get_global_settings( array( 'lightbox' ) ); } } return $lightbox_settings ?? null; } /** * Adds the directives and layout needed for the lightbox behavior. * * @since 6.4.0 * * @param string $block_content Rendered block content. * @param array $block Block object. * @param WP_Block $block_instance Block instance. * * @return string Filtered block content. */ function block_core_image_render_lightbox( $block_content, array $block, WP_Block $block_instance ) { /* * If there's no IMG tag in the block then return the given block content * as-is. There's nothing that this code can knowingly modify to add the * lightbox behavior. */ $processor = new WP_HTML_Tag_Processor( $block_content ); if ( $processor->next_tag( 'figure' ) ) { $processor->set_bookmark( 'figure' ); } if ( ! $processor->next_tag( 'img' ) ) { return $block_content; } $alt = $processor->get_attribute( 'alt' ); $img_uploaded_src = $processor->get_attribute( 'src' ); $img_class_names = $processor->get_attribute( 'class' ); $img_styles = $processor->get_attribute( 'style' ); $img_width = 'none'; $img_height = 'none'; $img_srcset = false; wp_interactivity_config( 'core/image', array( 'defaultAriaLabel' => __( 'Enlarged image' ), 'closeButtonText' => esc_html__( 'Close' ), 'prevButtonText' => esc_html_x( 'Previous', 'previous image in lightbox' ), 'nextButtonText' => esc_html_x( 'Next', 'next image in lightbox' ), ) ); if ( $alt ) { /* translators: %s: Image alt text. */ $custom_aria_label = sprintf( __( 'Enlarged image: %s' ), $alt ); } if ( isset( $block['attrs']['id'] ) ) { $img_uploaded_src = wp_get_attachment_url( $block['attrs']['id'] ); $img_metadata = wp_get_attachment_metadata( $block['attrs']['id'] ); $has_dimensions = ( $img_metadata['width'] ?? '' ) && ( $img_metadata['height'] ?? '' ); $srcset_size = $has_dimensions ? array( $img_metadata['width'], $img_metadata['height'] ) : 'large'; $img_srcset = wp_get_attachment_image_srcset( $block['attrs']['id'], $srcset_size ); $img_width = $img_metadata['width'] ?? 'none'; $img_height = $img_metadata['height'] ?? 'none'; } // Figure. $processor->seek( 'figure' ); $figure_class_names = $processor->get_attribute( 'class' ); $figure_styles = $processor->get_attribute( 'style' ); // Create unique id and set the image metadata in the state. $unique_image_id = uniqid(); wp_interactivity_state( 'core/image', array( 'metadata' => array( $unique_image_id => array( 'uploadedSrc' => $img_uploaded_src, 'lightboxSrcset' => $img_srcset, 'figureClassNames' => $figure_class_names, 'figureStyles' => $figure_styles, 'imgClassNames' => $img_class_names, 'imgStyles' => $img_styles, 'targetWidth' => $img_width, 'targetHeight' => $img_height, 'scaleAttr' => $block['attrs']['scale'] ?? false, 'alt' => $alt, 'galleryId' => $block_instance->context['galleryId'] ?? null, 'customAriaLabel' => $custom_aria_label ?? null, 'navigationButtonType' => $block_instance->context['navigationButtonType'] ?? 'icon', 'triggerButtonAriaLabel' => __( 'Enlarge' ), ), ), ) ); $processor->add_class( 'wp-lightbox-container' ); $processor->set_attribute( 'data-wp-interactive', 'core/image' ); $processor->set_attribute( 'data-wp-context', wp_json_encode( array( 'imageId' => $unique_image_id ), JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP ) ); $processor->set_attribute( 'data-wp-key', $unique_image_id ); // Image. $processor->next_tag( 'img' ); $processor->set_attribute( 'data-wp-init', 'callbacks.setButtonStyles' ); $processor->set_attribute( 'data-wp-on--load', 'callbacks.setButtonStyles' ); $processor->set_attribute( 'data-wp-on-window--resize', 'callbacks.setButtonStyles' ); // Set an event to preload the image on pointerenter and pointerdown(mobile). // Pointerleave is used to cancel the preload if the user hovers away from the image // before the predefined delay. $processor->set_attribute( 'data-wp-on--pointerenter', 'actions.preloadImageWithDelay' ); $processor->set_attribute( 'data-wp-on--pointerdown', 'actions.preloadImage' ); $processor->set_attribute( 'data-wp-on--pointerleave', 'actions.cancelPreload' ); // Sets an event callback on the `img` because the `figure` element can also // contain a caption, and we don't want to trigger the lightbox when the // caption is clicked. $processor->set_attribute( 'data-wp-on--click', 'actions.showLightbox' ); $processor->set_attribute( 'data-wp-class--hide', 'state.isContentHidden' ); $processor->set_attribute( 'data-wp-class--show', 'state.isContentVisible' ); $body_content = $processor->get_updated_html(); // Adds a button alongside image in the body content. $img = null; preg_match( '/<img[^>]+>/', $body_content, $img ); $button = $img[0] . '<button class="lightbox-trigger" type="button" aria-haspopup="dialog" data-wp-bind--aria-label="state.thisImage.triggerButtonAriaLabel" data-wp-init="callbacks.initTriggerButton" data-wp-on--click="actions.showLightbox" data-wp-style--right="state.thisImage.buttonRight" data-wp-style--top="state.thisImage.buttonTop" > <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="none" viewBox="0 0 12 12"> <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" /> </svg> </button>'; $body_content = preg_replace( '/<img[^>]+>/', $button, $body_content ); add_action( 'wp_footer', 'block_core_image_print_lightbox_overlay' ); return $body_content; } /** * @since 6.5.0 */ function block_core_image_print_lightbox_overlay() { $dialog_label = esc_attr__( 'Enlarged images' ); $close_button_text = esc_attr__( 'Close' ); $prev_button_text = esc_attr_x( 'Previous', 'previous image in lightbox' ); $next_button_text = esc_attr_x( 'Next', 'next image in lightbox' ); $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>'; $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>'; $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>'; // If the current theme does NOT have a `theme.json`, or the colors are not // defined, it needs to set the background color & close button color to some // default values because it can't get them from the Global Styles. $background_color = '#fff'; $close_button_color = '#000'; if ( wp_theme_has_theme_json() ) { $global_styles_color = wp_get_global_styles( array( 'color' ) ); if ( ! empty( $global_styles_color['background'] ) ) { $background_color = esc_attr( $global_styles_color['background'] ); } if ( ! empty( $global_styles_color['text'] ) ) { $close_button_color = esc_attr( $global_styles_color['text'] ); } } echo <<<HTML <div class="wp-lightbox-overlay zoom" aria-label="{$dialog_label}" data-wp-interactive="core/image" data-wp-router-region='{ "id": "core/image-overlay", "attachTo": "body" }' data-wp-key="wp-lightbox-overlay" data-wp-context='{}' data-wp-bind--role="state.roleAttribute" data-wp-bind--aria-label="state.ariaLabel" data-wp-bind--aria-modal="state.ariaModal" data-wp-class--active="state.overlayEnabled" data-wp-class--show-closing-animation="state.overlayOpened" data-wp-watch---focus="callbacks.setOverlayFocus" data-wp-watch---inert="callbacks.setInertElements" data-wp-on--keydown="actions.handleKeydown" data-wp-on--touchstart="actions.handleTouchStart" data-wp-on--touchmove="actions.handleTouchMove" data-wp-on--touchend="actions.handleTouchEnd" data-wp-on--click="actions.hideLightbox" data-wp-on-window--resize="callbacks.setOverlayStyles" data-wp-on-window--scroll="actions.handleScroll" data-wp-bind--style="state.overlayStyles" tabindex="-1" > <button type="button" style="fill:{$close_button_color}" class="wp-lightbox-close-button" data-wp-bind--aria-label="state.closeButtonAriaLabel"> <span class="wp-lightbox-close-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$close_button_icon}</span> <span class="wp-lightbox-close-text" data-wp-bind--hidden="!state.hasNavigationText">{$close_button_text}</span> </button> <button type="button" style="fill:{$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"> <span class="wp-lightbox-navigation-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$prev_button_icon}</span> <span class="wp-lightbox-navigation-text" data-wp-bind--hidden="!state.hasNavigationText">{$prev_button_text}</span> </button> <div class="lightbox-image-container"> <figure data-wp-bind--class="state.selectedImage.figureClassNames" data-wp-bind--style="state.figureStyles"> <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"> </figure> </div> <div class="lightbox-image-container"> <figure data-wp-bind--class="state.selectedImage.figureClassNames" data-wp-bind--style="state.figureStyles"> <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.enlargedSrc" data-wp-bind--srcset="state.enlargedSrcset" sizes="100vw" > </figure> </div> <button type="button" style="fill:{$close_button_color}" class="wp-lightbox-navigation-button wp-lightbox-navigation-button-next" data-wp-bind--hidden="!state.hasNavigation" data-wp-on--click="actions.showNextImage" data-wp-bind--aria-label="state.nextButtonAriaLabel"> <span class="wp-lightbox-navigation-text" data-wp-bind--hidden="!state.hasNavigationText">{$next_button_text}</span> <span class="wp-lightbox-navigation-icon" data-wp-bind--hidden="!state.hasNavigationIcon">{$next_button_icon}</span> </button> <div data-wp-text="state.ariaLabel" aria-live="polite" aria-atomic="true" class="screen-reader-text"></div> <div class="scrim" style="background-color: {$background_color}" aria-hidden="true"></div> </div> HTML; } /** * Registers the `core/image` block on server. * * @since 5.9.0 */ function register_block_core_image() { register_block_type_from_metadata( __DIR__ . '/image', array( 'render_callback' => 'render_block_core_image', ) ); } add_action( 'init', 'register_block_core_image' );
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