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<?php |
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/* @description Transformation Style Sheets - Revolutionising PHP templating * |
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* @author Tom Butler [email protected] * |
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* @copyright 2017 Tom Butler <[email protected]> | https://r.je/ * |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
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* @version 1.2 */ |
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namespace Transphporm\Hook; |
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use \Transphporm\Parser\Tokenizer; |
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/** Determines whether $element matches the pseudo rule such as nth-child() or [attribute="value"] */ |
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class PseudoMatcher { |
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private $pseudo; |
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private $valueParser; |
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private $functions = []; |
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private $funcParts = []; |
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public function __construct($pseudo, \Transphporm\Parser\Value $valueParser) { |
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$this->pseudo = $pseudo; |
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$this->valueParser = $valueParser; |
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} |
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public function registerFunction($name, \Transphporm\Pseudo $pseudo) { |
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$this->functions[$name] = $pseudo; |
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} |
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public function matches($element) { |
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foreach ($this->pseudo as $i => $tokens) { |
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$parts = $this->getFuncParts($i, $tokens); |
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if ($parts['name'] === null) $parts['name'] = 'data'; |
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if (!isset($this->functions[$parts['name']])) return true; |
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if ($this->match($parts, $this->functions[$parts['name']], $element) === false) { |
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return false; |
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} |
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} |
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return true; |
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} |
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private function match($parts, $function, $element) { |
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try { |
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$matches = $function->match($parts['name'], $parts['args'], $element); |
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if ($matches === false) return false; |
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} |
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catch (\Exception $e) { |
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throw new \Transphporm\RunException(\Transphporm\Exception::PSEUDO, $parts['name'], $e); |
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} |
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} |
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private function getFuncParts($i, $tokens) { |
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if (isset($this->funcParts[$i])) return $this->funcParts[$i]; |
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$parts = []; |
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$canCache = true; |
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$parts['name'] = $this->getFuncName($tokens); |
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if ($parts['name'] === null || in_array($parts['name'], ['data', 'iteration', 'root'])) { |
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//If the args are dynamic, it can't be cached as it may change between calls |
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$canCache = false; |
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$parts['args'] = $this->valueParser->parseTokens($tokens); |
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} |
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else if (count($tokens) > 1) { |
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$tokens->rewind(); |
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$tokens->next(); |
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$this->skipWhitespace($tokens); |
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$parts['args'] = $this->valueParser->parseTokens($tokens->current()['value']); |
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} |
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else $parts['args'] = [['']]; |
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if ($canCache) $this->funcParts[$i] = $parts; |
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return $parts; |
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} |
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private function skipWhitespace($tokens) { |
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while ($tokens->current()['type'] === 'WHITESPACE' || $tokens->current()['type'] == 'NEWLINE') $tokens->next(); |
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} |
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private function getFuncName($tokens) { |
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if ($tokens->type() === Tokenizer::NAME) return $tokens->read(); |
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return null; |
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} |
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public function hasFunction($name) { |
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foreach ($this->pseudo as $tokens) { |
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if ($name === $this->getFuncName($tokens)) return true; |
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} |
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} |
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public function getFuncArgs($name) { |
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foreach ($this->pseudo as $i => $tokens) { |
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$parts = $this->getFuncParts($i, $tokens); |
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if ($name === $parts['name']) return $parts['args']; |
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} |
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} |
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} |
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Level-2 /
Transphporm
