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Fix applying bindings or pattern overrides to button blocks with empt…
…y text (WordPress#62220) * Dynamically check button text and avoid rendering a button when empty * Handle both anchor and button tags * Fix lint issues * Address review feedback * Simplify checks for empty content * Check for comment tokens * Update native test snapshots * Update initial HTML native test snippet ---- Co-authored-by: talldan <[email protected]> Co-authored-by: dmsnell <[email protected]> Co-authored-by: kevin940726 <[email protected]> Co-authored-by: SantosGuillamot <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| <?php | ||
| /** | ||
| * Server-side rendering of the `core/button` block. | ||
| * | ||
| * @package WordPress | ||
| */ | ||
|
|
||
| /** | ||
| * Renders the `core/button` block on the server, | ||
| * | ||
| * @since 6.6.0 | ||
| * | ||
| * @param array $attributes The block attributes. | ||
| * @param string $content The block content. | ||
| * @param WP_Block $block The block object. | ||
| * | ||
| * @return string The block content. | ||
| */ | ||
| function render_block_core_button( $attributes, $content ) { | ||
| $p = new WP_HTML_Tag_Processor( $content ); | ||
|
|
||
| /* | ||
| * The button block can render an `<a>` or `<button>` and also has a | ||
| * `<div>` wrapper. Find the a or button tag. | ||
| */ | ||
| $tag = null; | ||
| while ( $p->next_tag() ) { | ||
| $tag = $p->get_tag(); | ||
| if ( 'A' === $tag || 'BUTTON' === $tag ) { | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| /* | ||
| * If this happens, the likelihood is there's no block content, | ||
| * or the block has been modified by a plugin. | ||
| */ | ||
| if ( null === $tag ) { | ||
| return $content; | ||
| } | ||
|
|
||
| // If the next token is the closing tag, the button is empty. | ||
| $is_empty = true; | ||
| while ( $p->next_token() && $tag !== $p->get_token_name() && $is_empty ) { | ||
| if ( '#comment' !== $p->get_token_type() ) { | ||
| /** | ||
| * Anything else implies this is not empty. | ||
| * This might include any text content (including a space), | ||
| * inline images or other HTML. | ||
| */ | ||
| $is_empty = false; | ||
| } | ||
| } | ||
|
|
||
| /* | ||
| * When there's no text, render nothing for the block. | ||
| * See https://github.com/WordPress/gutenberg/issues/17221 for the | ||
| * reasoning behind this. | ||
| */ | ||
| if ( $is_empty ) { | ||
| return ''; | ||
| } | ||
|
|
||
| return $content; | ||
| } | ||
|
|
||
| /** | ||
| * Registers the `core/button` block on server. | ||
| * | ||
| * @since 6.6.0 | ||
| */ | ||
| function register_block_core_button() { | ||
| register_block_type_from_metadata( | ||
| __DIR__ . '/button', | ||
| array( | ||
| 'render_callback' => 'render_block_core_button', | ||
| ) | ||
| ); | ||
| } | ||
| add_action( 'init', 'register_block_core_button' ); |
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