<?php
namespace MailPoetVendor\Sabberworm\CSS\Value;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Sabberworm\CSS\Parsing\ParserState;
use MailPoetVendor\Sabberworm\CSS\Parsing\UnexpectedEOFException;
use MailPoetVendor\Sabberworm\CSS\Parsing\UnexpectedTokenException;
class CalcFunction extends CSSFunction
{
const T_OPERAND = 1;
const T_OPERATOR = 2;
public static function parse(ParserState $oParserState)
{
$aOperators = ['+', '-', '*', '/'];
$sFunction = \trim($oParserState->consumeUntil('(', \false, \true));
$oCalcList = new CalcRuleValueList($oParserState->currentLine());
$oList = new RuleValueList(',', $oParserState->currentLine());
$iNestingLevel = 0;
$iLastComponentType = null;
while (!$oParserState->comes(')') || $iNestingLevel > 0) {
$oParserState->consumeWhiteSpace();
if ($oParserState->comes('(')) {
$iNestingLevel++;
$oCalcList->addListComponent($oParserState->consume(1));
$oParserState->consumeWhiteSpace();
continue;
} elseif ($oParserState->comes(')')) {
$iNestingLevel--;
$oCalcList->addListComponent($oParserState->consume(1));
$oParserState->consumeWhiteSpace();
continue;
}
if ($iLastComponentType != CalcFunction::T_OPERAND) {
$oVal = Value::parsePrimitiveValue($oParserState);
$oCalcList->addListComponent($oVal);
$iLastComponentType = CalcFunction::T_OPERAND;
} else {
if (\in_array($oParserState->peek(), $aOperators)) {
if ($oParserState->comes('-') || $oParserState->comes('+')) {
if ($oParserState->peek(1, -1) != ' ' || !($oParserState->comes('- ') || $oParserState->comes('+ '))) {
throw new UnexpectedTokenException(" {$oParserState->peek()} ", $oParserState->peek(1, -1) . $oParserState->peek(2), 'literal', $oParserState->currentLine());
}
}
$oCalcList->addListComponent($oParserState->consume(1));
$iLastComponentType = CalcFunction::T_OPERATOR;
} else {
throw new UnexpectedTokenException(\sprintf('Next token was expected to be an operand of type %s. Instead "%s" was found.', \implode(', ', $aOperators), $oVal), '', 'custom', $oParserState->currentLine());
}
}
$oParserState->consumeWhiteSpace();
}
$oList->addListComponent($oCalcList);
$oParserState->consume(')');
return new CalcFunction($sFunction, $oList, ',', $oParserState->currentLine());
}
}