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PHP 8.1.34
Preview: css-converter.php Size: 8.18 KB
//home2/astrociv/www/wp-content/plugins/elementor/modules/atomic-widgets/css-converter/css-converter.php
<?php

namespace Elementor\Modules\AtomicWidgets\CssConverter;

use Elementor\Modules\AtomicWidgets\CssConverter\Metrics\Conversion_Failure_Reporter;
use Elementor\Modules\AtomicWidgets\Parsers\Props_Parser;
use Elementor\Modules\AtomicWidgets\Styles\Style_Schema;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

class Css_Converter {
	const BLOCKED_PROPERTIES = [ 'behavior', '-moz-binding' ];
	const BLOCKED_VALUE_NEEDLES = [ 'expression(', 'javascript:' ];

	private Converter_Registry $registry;

	private Conversion_Failure_Reporter $failure_reporter;

	private Expander_Registry $expanders;

	private ?Variable_Prop_Value_Transformer $variable_transformer;

	public function __construct(
		Converter_Registry $registry,
		Conversion_Failure_Reporter $failure_reporter,
		?Expander_Registry $expanders = null,
		?Variable_Prop_Value_Transformer $variable_transformer = null
	) {
		$this->registry = $registry;
		$this->failure_reporter = $failure_reporter;
		$this->expanders = $expanders ?? new Expander_Registry();
		$this->variable_transformer = $variable_transformer;
	}

	/**
	 * @return array{props: array, customCss: string, rejected: string[]}
	 */
	public function convert( string $css ): array {
		$rules = $this->dedupe( $this->expand_shorthands( $this->parse( $css ) ) );
		$context = new Conversion_Context( $rules );
		$leftover = [];

		foreach ( $rules as $rule ) {
			if ( ! $this->try_convert( $context, $rule ) ) {
				$leftover[] = $rule['declaration'] . ';';
			}
		}

		$props = $context->get_props();
		$rejected = $context->get_rejected();

		if ( $this->variable_transformer ) {
			$schema = $this->style_schema();
			$props = $this->variable_transformer->transform( $props, $schema );

			$ejected = $this->variable_transformer->eject_unresolved_var_props( $props, $schema, $rules );
			$props = $ejected['props'];
			$leftover = array_merge( $leftover, $ejected['custom_css'] );
			$rejected = array_merge( $rejected, $ejected['rejected'] );
			$props = $this->validate_props( $props, $schema );
		}

		$props = $this->cleanup_props( $props );

		return [
			'props'     => $props,
			'customCss' => implode( ' ', $leftover ),
			'rejected'  => $rejected,
		];
	}

	private function validate_props( array $props, array $schema ): array {
		if ( empty( $props ) ) {
			return [];
		}

		$null_resets = array_filter( $props, fn( $v ) => null === $v || $this->has_null_leaf( $v ) );
		$value_props = array_filter( $props, fn( $v ) => null !== $v && ! $this->has_null_leaf( $v ) );

		$validated = empty( $value_props )
			? []
			: Props_Parser::make( $schema )->validate( $value_props )->unwrap();

		return array_merge( $validated, $null_resets );
	}

	private function has_null_leaf( $value ): bool {
		if ( ! is_array( $value ) || ! is_array( $value['value'] ?? null ) ) {
			return false;
		}

		foreach ( $value['value'] as $v ) {
			if ( null === $v || $this->has_null_leaf( $v ) ) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Recursively collapses prop values where all present sub-values are null or empty arrays into a
	 * single null. This propagates null resets up the tree so the client receives a clean signal:
	 * e.g. a Dimensions object where every side was set to null becomes just null at the prop level.
	 */
	private function cleanup_props( array $props ): array {
		$result = [];

		foreach ( $props as $key => $value ) {
			$result[ $key ] = $this->cleanup_value( $value );
		}

		return $result;
	}

	private function cleanup_value( $value ) {
		if ( null === $value || ! is_array( $value ) ) {
			return $value;
		}

		$inner = $value['value'] ?? $value;

		if ( ! is_array( $inner ) ) {
			return $value;
		}

		$cleaned = [];

		foreach ( $inner as $k => $v ) {
			$cleaned[ $k ] = $this->cleanup_value( $v );
		}

		if ( $this->is_empty_or_all_null( $cleaned ) ) {
			return null;
		}

		return isset( $value['$$type'] )
			? [
				'$$type' => $value['$$type'],
				'value' => $cleaned,
			]
			: $cleaned;
	}

	private function is_empty_or_all_null( array $arr ): bool {
		if ( empty( $arr ) ) {
			return false;
		}

		foreach ( $arr as $v ) {
			if ( null !== $v ) {
				return false;
			}
		}

		return true;
	}

	private function style_schema(): array {
		if ( function_exists( 'apply_filters' ) ) {
			return Style_Schema::get();
		}

		return Style_Schema::get_style_schema();
	}

	/**
	 * Pre-processing pass: rewrite shorthands (e.g. `border`) into the longhand declarations the
	 * schema-bound converters understand, in place so the source cascade order is preserved. A rule
	 * with no matching expander, or whose expander declines (empty result) or throws, is kept as-is so
	 * it still reaches the converter loop (and custom_css fallback).
	 *
	 * @param array<int, array{property: string, value: string, declaration: string}> $rules
	 * @return array<int, array{property: string, value: string, declaration: string}>
	 */
	private function dedupe( array $rules ): array {
		$last_index = [];

		foreach ( $rules as $i => $rule ) {
			$last_index[ $rule['property'] ] = $i;
		}

		return array_values(
			array_filter( $rules, fn( $rule, $i ) => $last_index[ $rule['property'] ] === $i, ARRAY_FILTER_USE_BOTH )
		);
	}

	private function expand_shorthands( array $rules ): array {
		$expanded = [];

		foreach ( $rules as $rule ) {
			foreach ( $this->expand_rule( $rule ) as $result_rule ) {
				$expanded[] = $result_rule;
			}
		}

		return $expanded;
	}

	/**
	 * @param array{property: string, value: string, declaration: string} $rule
	 * @return array<int, array{property: string, value: string, declaration: string}>
	 */
	private function expand_rule( array $rule ): array {
		foreach ( $this->expanders->all() as $expander ) {
			if ( ! $expander->is_supported( $rule ) ) {
				continue;
			}

			try {
				$expanded = $expander->expand( $rule );
			} catch ( \Throwable $error ) {
				$this->failure_reporter->report(
					$rule['property'],
					Conversion_Failure_Reporter::CATEGORY_EXCEPTION,
					[ 'message' => $error->getMessage() ]
				);

				return [ $rule ];
			}

			return empty( $expanded ) ? [ $rule ] : $expanded;
		}

		return [ $rule ];
	}

	/**
	 * Try-until-success: iterate converters in registration order; the first one that
	 * converts wins. A thrown error is treated as a decline and reported as a defect.
	 *
	 * @param Conversion_Context                     $context The shared mutable conversion context.
	 * @param array{property: string, value: string} $rule    A single parsed CSS declaration.
	 */
	private function try_convert( Conversion_Context $context, array $rule ): bool {
		foreach ( $this->registry->all() as $converter ) {
			if ( ! $converter->is_supported( $rule ) ) {
				continue;
			}

			try {
				if ( $converter->convert( $context, $rule ) ) {
					return true;
				}
			} catch ( \Throwable $error ) {
				$this->failure_reporter->report(
					$rule['property'],
					Conversion_Failure_Reporter::CATEGORY_EXCEPTION,
					[ 'message' => $error->getMessage() ]
				);
			}
		}

		return false;
	}

	/**
	 * Naive top-level split on ';' (breaks on values containing ';'); acceptable for clean
	 * LLM input. Splits each declaration on the first ':' so values keep colons (e.g. url()).
	 *
	 * @return array<int, array{property: string, value: string}>
	 */
	private function parse( string $css ): array {
		$rules = [];

		foreach ( explode( ';', $css ) as $declaration ) {
			$declaration = trim( $declaration );

			$separator = strpos( $declaration, ':' );

			if ( false === $separator ) {
				continue;
			}

			$property = strtolower( trim( substr( $declaration, 0, $separator ) ) );
			$raw_value = trim( substr( $declaration, $separator + 1 ) );

			if ( '' === $property || '' === $raw_value || $this->is_blocked( $property, $raw_value ) ) {
				continue;
			}

			$value = 'null' === $raw_value ? null : $raw_value;

			$rules[] = [
				'property' => $property,
				'value' => $value,
				'declaration' => $declaration,
			];
		}

		return $rules;
	}

	private function is_blocked( string $property, string $value ): bool {
		if ( in_array( $property, self::BLOCKED_PROPERTIES, true ) ) {
			return true;
		}

		$value = strtolower( $value );

		foreach ( self::BLOCKED_VALUE_NEEDLES as $needle ) {
			if ( false !== strpos( $value, $needle ) ) {
				return true;
			}
		}

		return false;
	}
}

Directory Contents

Dirs: 4 × Files: 14
Name Size Perms Modified Actions
- drwxr-xr-x 2026-09-08 12:13:50
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expanders DIR
- drwxr-xr-x 2026-09-08 12:13:50
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metrics DIR
- drwxr-xr-x 2026-09-08 12:13:50
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- drwxr-xr-x 2026-09-08 12:13:50
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1021 B lrwxr-xr-x 2026-09-08 12:13:50
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8.99 KB lrwxr-xr-x 2026-09-08 12:13:50
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