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<?php |
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/** |
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* Process wp-style directive attribute. |
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* |
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* @package Gutenberg |
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* @subpackage Interactivity API |
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*/ |
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|
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/** |
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* Process wp-style directive attribute. |
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* |
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* @param WP_Directive_Processor $tags Tags. |
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* @param WP_Directive_Context $context Directive context. |
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*/ |
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function gutenberg_interactivity_process_wp_style( $tags, $context ) { |
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if ( $tags->is_tag_closer() ) { |
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return; |
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} |
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|
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$prefixed_attributes = $tags->get_attribute_names_with_prefix( 'data-wp-style--' ); |
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|
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foreach ( $prefixed_attributes as $attr ) { |
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list( , $style_name ) = WP_Directive_Processor::parse_attribute_name( $attr ); |
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if ( empty( $style_name ) ) { |
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continue; |
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} |
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|
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$expr = $tags->get_attribute( $attr ); |
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$style_value = gutenberg_interactivity_evaluate_reference( $expr, $context->get_context() ); |
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if ( $style_value ) { |
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$style_attr = $tags->get_attribute( 'style' ); |
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$style_attr = gutenberg_interactivity_set_style( $style_attr, $style_name, $style_value ); |
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$tags->set_attribute( 'style', $style_attr ); |
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} else { |
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// TODO: Do we want to unset styles if they're 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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* Set style. |
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* |
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* @param string $style Existing style to amend. |
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* @param string $name Style property name. |
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* @param string $value Style property value. |
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* @return string Amended styles. |
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*/ |
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function gutenberg_interactivity_set_style( $style, $name, $value ) { |
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$style_assignments = explode( ';', $style ); |
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$modified = false; |
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foreach ( $style_assignments as $style_assignment ) { |
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list( $style_name ) = explode( ':', $style_assignment ); |
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if ( trim( $style_name ) === $name ) { |
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// TODO: Retain surrounding whitespace from $style_value, if any. |
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$style_assignment = $style_name . ': ' . $value; |
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$modified = true; |
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break; |
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} |
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} |
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|
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if ( ! $modified ) { |
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$new_style_assignment = $name . ': ' . $value; |
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// If the last element is empty or whitespace-only, we insert |
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// the new "key: value" pair before it. |
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if ( empty( trim( end( $style_assignments ) ) ) ) { |
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array_splice( $style_assignments, - 1, 0, $new_style_assignment ); |
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} else { |
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array_push( $style_assignments, $new_style_assignment ); |
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} |
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} |
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return implode( ';', $style_assignments ); |
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} |
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