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<?php
/**
* Button Block.
*
* @since 8.5.0
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack\Extensions\Button;
use Automattic\Jetpack\Blocks;
use Jetpack_Gutenberg;
const FEATURE_NAME = 'button';
const BLOCK_NAME = 'jetpack/' . FEATURE_NAME;
/**
* Registers the block for use in Gutenberg
* This is done via an action so that we can disable
* registration if we need to.
*/
function register_block() {
Blocks::jetpack_register_block(
BLOCK_NAME,
array(
'render_callback' => __NAMESPACE__ . '\render_block',
'uses_context' => array( 'jetpack/parentBlockWidth' ),
)
);
}
add_action( 'init', __NAMESPACE__ . '\register_block' );
/**
* Button block render callback.
*
* @param array $attributes Array containing the Button block attributes.
* @param string $content The Button block content.
*
* @return string
*/
function render_block( $attributes, $content ) {
$save_in_post_content = get_attribute( $attributes, 'saveInPostContent' );
// The Jetpack Button block depends on the core button block styles.
// The following ensures that those styles are enqueued when rendering this block.
enqueue_existing_button_style_dependency( 'core/button' );
enqueue_existing_button_style_dependency( 'core/buttons' );
Jetpack_Gutenberg::load_styles_as_required( FEATURE_NAME );
if ( $save_in_post_content || ! class_exists( 'DOMDocument' ) ) {
return $content;
}
$element = get_attribute( $attributes, 'element' );
$text = get_attribute( $attributes, 'text' );
$unique_id = get_attribute( $attributes, 'uniqueId' );
$url = get_attribute( $attributes, 'url' );
$classes = Blocks::classes( FEATURE_NAME, $attributes, array( 'wp-block-button' ) );
$button_classes = get_button_classes( $attributes );
$button_styles = get_button_styles( $attributes );
$wrapper_styles = get_button_wrapper_styles( $attributes );
$wrapper_attributes = sprintf( ' class="%s" style="%s"', esc_attr( $classes ), esc_attr( $wrapper_styles ) );
$button_attributes = sprintf( ' class="%s" style="%s"', esc_attr( $button_classes ), esc_attr( $button_styles ) );
if ( empty( $unique_id ) ) {
$button_attributes .= ' data-id-attr="placeholder"';
} else {
$button_attributes .= sprintf( ' data-id-attr="%1$s" id="%1$s"', esc_attr( $unique_id ) );
}
if ( 'a' === $element ) {
$button_attributes .= sprintf( ' href="%s" target="_blank" role="button" rel="noopener noreferrer"', esc_url( $url ) );
} elseif ( 'button' === $element ) {
$button_attributes .= ' type="submit"';
} elseif ( 'input' === $element ) {
$button_attributes .= sprintf( ' type="submit" value="%s"', wp_strip_all_tags( $text, true ) );
}
$button = 'input' === $element
? '<' . $element . $button_attributes . ' />'
: '<' . $element . $button_attributes . '>' . $text . '</' . $element . '>';
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
return '<div' . $wrapper_attributes . '>' . $button . '</div>';
}
/**
* Get the Button block classes.
*
* @param array $attributes Array containing the block attributes.
*
* @return string
*/
function get_button_classes( $attributes ) {
$classes = array( 'wp-block-button__link' );
$has_class_name = array_key_exists( 'className', $attributes );
$has_named_text_color = array_key_exists( 'textColor', $attributes );
$has_custom_text_color = array_key_exists( 'customTextColor', $attributes );
$has_named_background_color = array_key_exists( 'backgroundColor', $attributes );
$has_custom_background_color = array_key_exists( 'customBackgroundColor', $attributes );
$has_named_gradient = array_key_exists( 'gradient', $attributes );
$has_custom_gradient = array_key_exists( 'customGradient', $attributes );
$has_border_radius = array_key_exists( 'borderRadius', $attributes );
if ( $has_class_name ) {
$classes[] = $attributes['className'];
}
if ( $has_named_text_color || $has_custom_text_color ) {
$classes[] = 'has-text-color';
}
if ( $has_named_text_color ) {
$classes[] = sprintf( 'has-%s-color', $attributes['textColor'] );
}
if (
$has_named_background_color ||
$has_custom_background_color ||
$has_named_gradient ||
$has_custom_gradient
) {
$classes[] = 'has-background';
}
if ( $has_named_background_color && ! $has_custom_gradient ) {
$classes[] = sprintf( 'has-%s-background-color', $attributes['backgroundColor'] );
}
if ( $has_named_gradient ) {
$classes[] = sprintf( 'has-%s-gradient-background', $attributes['gradient'] );
}
// phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual
if ( $has_border_radius && 0 == $attributes['borderRadius'] ) {
$classes[] = 'no-border-radius';
}
return implode( ' ', $classes );
}
/**
* Get the Button block styles.
*
* @param array $attributes Array containing the block attributes.
*
* @return string
*/
function get_button_styles( $attributes ) {
$styles = array();
$has_named_text_color = array_key_exists( 'textColor', $attributes );
$has_custom_text_color = array_key_exists( 'customTextColor', $attributes );
$has_named_background_color = array_key_exists( 'backgroundColor', $attributes );
$has_custom_background_color = array_key_exists( 'customBackgroundColor', $attributes );
$has_named_gradient = array_key_exists( 'gradient', $attributes );
$has_custom_gradient = array_key_exists( 'customGradient', $attributes );
$has_border_radius = array_key_exists( 'borderRadius', $attributes );
$has_width = array_key_exists( 'width', $attributes );
if ( ! $has_named_text_color && $has_custom_text_color ) {
$styles[] = sprintf( 'color: %s;', $attributes['customTextColor'] );
}
if ( ! $has_named_background_color && ! $has_named_gradient && $has_custom_gradient ) {
$styles[] = sprintf( 'background: %s;', $attributes['customGradient'] );
}
if (
$has_custom_background_color &&
! $has_named_background_color &&
! $has_named_gradient &&
! $has_custom_gradient
) {
$styles[] = sprintf( 'background-color: %s;', $attributes['customBackgroundColor'] );
}
// phpcs:ignore Universal.Operators.StrictComparisons.LooseNotEqual
if ( $has_border_radius && 0 != $attributes['borderRadius'] ) {
$styles[] = sprintf( 'border-radius: %spx;', $attributes['borderRadius'] );
}
if ( $has_width ) {
$styles[] = sprintf( 'width: %s;', $attributes['width'] );
$styles[] = 'max-width: 100%';
}
return implode( ' ', $styles );
}
/**
* Get the Button wrapper block styles.
*
* @param array $attributes Array containing the block attributes.
*
* @return string
*/
function get_button_wrapper_styles( $attributes ) {
$styles = array();
$has_width = array_key_exists( 'width', $attributes );
if ( $has_width ) {
$styles[] = 'max-width: 100%';
}
return implode( ' ', $styles );
}
/**
* Get filtered attributes.
*
* @param array $attributes Array containing the Button block attributes.
* @param string $attribute_name String containing the attribute name to get.
*
* @return string
*/
function get_attribute( $attributes, $attribute_name ) {
if ( isset( $attributes[ $attribute_name ] ) ) {
return $attributes[ $attribute_name ];
}
$default_attributes = array(
'url' => '#',
'element' => 'a',
'saveInPostContent' => false,
);
if ( isset( $default_attributes[ $attribute_name ] ) ) {
return $default_attributes[ $attribute_name ];
}
}
/**
* Enqueue style for an existing block.
*
* The Jetpack Button block depends on styles from the core button block.
* In case that block is not already within the post content, we can use
* this function to ensure the block's style assets are enqueued.
*
* @param string $block_name Block type name including namespace.
*/
function enqueue_existing_button_style_dependency( $block_name ) {
$existing_block = \WP_Block_Type_Registry::get_instance()->get_registered( $block_name );
if ( isset( $existing_block ) && ! empty( $existing_block->style ) ) {
wp_enqueue_style( $existing_block->style );
}
}