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<?php |
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|
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declare(strict_types=1); |
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|
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namespace AcyMailing\Libraries\Sabberworm\CSS\Value; |
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|
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use AcyMailing\Libraries\Sabberworm\CSS\Parsing\ParserState; |
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use AcyMailing\Libraries\Sabberworm\CSS\Parsing\UnexpectedEOFException; |
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use AcyMailing\Libraries\Sabberworm\CSS\Parsing\UnexpectedTokenException; |
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|
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class CalcFunction extends CSSFunction |
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{ |
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/** |
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* @var int |
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*/ |
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private const T_OPERAND = 1; |
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|
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/** |
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* @var int |
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*/ |
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private const T_OPERATOR = 2; |
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|
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/** |
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* @throws UnexpectedTokenException |
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* @throws UnexpectedEOFException |
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* |
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* @internal since V8.8.0 |
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*/ |
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public static function parse(ParserState $parserState, bool $ignoreCase = false): CSSFunction |
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{ |
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$operators = ['+', '-', '*', '/']; |
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$function = $parserState->parseIdentifier(); |
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if ($parserState->peek() !== '(') { |
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// Found ; or end of line before an opening bracket |
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throw new UnexpectedTokenException('(', $parserState->peek(), 'literal', $parserState->currentLine()); |
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} elseif ($function !== 'calc') { |
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// Found invalid calc definition. Example calc (... |
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throw new UnexpectedTokenException('calc', $function, 'literal', $parserState->currentLine()); |
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} |
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$parserState->consume('('); |
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$calcRuleValueList = new CalcRuleValueList($parserState->currentLine()); |
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$list = new RuleValueList(',', $parserState->currentLine()); |
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$nestingLevel = 0; |
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$lastComponentType = null; |
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while (!$parserState->comes(')') || $nestingLevel > 0) { |
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if ($parserState->isEnd() && $nestingLevel === 0) { |
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break; |
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} |
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|
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$parserState->consumeWhiteSpace(); |
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if ($parserState->comes('(')) { |
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$nestingLevel++; |
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$calcRuleValueList->addListComponent($parserState->consume(1)); |
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$parserState->consumeWhiteSpace(); |
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continue; |
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} elseif ($parserState->comes(')')) { |
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$nestingLevel--; |
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$calcRuleValueList->addListComponent($parserState->consume(1)); |
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$parserState->consumeWhiteSpace(); |
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continue; |
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} |
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if ($lastComponentType !== CalcFunction::T_OPERAND) { |
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$value = Value::parsePrimitiveValue($parserState); |
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$calcRuleValueList->addListComponent($value); |
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$lastComponentType = CalcFunction::T_OPERAND; |
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} else { |
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if (\in_array($parserState->peek(), $operators, true)) { |
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if (($parserState->comes('-') || $parserState->comes('+'))) { |
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if ( |
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$parserState->peek(1, -1) !== ' ' |
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|| !($parserState->comes('- ') |
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|| $parserState->comes('+ ')) |
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) { |
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throw new UnexpectedTokenException( |
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" {$parserState->peek()} ", |
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$parserState->peek(1, -1) . $parserState->peek(2), |
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'literal', |
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$parserState->currentLine() |
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); |
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} |
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} |
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$calcRuleValueList->addListComponent($parserState->consume(1)); |
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$lastComponentType = CalcFunction::T_OPERATOR; |
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} else { |
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throw new UnexpectedTokenException( |
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\sprintf( |
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'Next token was expected to be an operand of type %s. Instead "%s" was found.', |
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\implode(', ', $operators), |
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$parserState->peek() |
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), |
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'', |
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'custom', |
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$parserState->currentLine() |
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); |
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} |
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} |
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$parserState->consumeWhiteSpace(); |
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} |
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$list->addListComponent($calcRuleValueList); |
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if (!$parserState->isEnd()) { |
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$parserState->consume(')'); |
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} |
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return new CalcFunction($function, $list, ',', $parserState->currentLine()); |
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} |
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} |
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|
