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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 2015 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 1.0 */ |
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namespace Transphporm\Parser; |
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class CssToXpath { |
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private $specialChars = [Tokenizer::WHITESPACE, Tokenizer::DOT, Tokenizer::GREATER_THAN, '~', Tokenizer::NUM_SIGN, Tokenizer::COLON, Tokenizer::OPEN_SQUARE_BRACKET]; |
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private $translators = []; |
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private $valueParser; |
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private static $instances = []; |
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private $functionSet; |
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public function __construct(Value $valueParser, \Transphporm\FunctionSet $functionSet, $prefix = '') { |
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$hash = $this->registerInstance(); |
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$this->valueParser = $valueParser; |
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$this->functionSet = $functionSet; |
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$this->translators = [ |
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Tokenizer::WHITESPACE => function($string) use ($prefix) { return '//' . $prefix . $string; }, |
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'' => function($string) use ($prefix) { return '/' . $prefix . $string; }, |
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Tokenizer::GREATER_THAN => function($string) use ($prefix) { return '/' . $prefix . $string; }, |
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Tokenizer::NUM_SIGN => function($string) { return '[@id=\'' . $string . '\']'; }, |
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Tokenizer::DOT => function($string) { return '[contains(concat(\' \', normalize-space(@class), \' \'), \' ' . $string . ' \')]'; }, |
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Tokenizer::OPEN_SQUARE_BRACKET => function($string) use ($hash) { return '[' .'php:function(\'\Transphporm\Parser\CssToXpath::processAttr\', \'' . json_encode($string) . '\', ., "' . $hash . '")' . ']'; } |
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]; |
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} |
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private function registerInstance() { |
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$hash = spl_object_hash($this); |
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self::$instances[$hash] = $this; |
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return $hash; |
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} |
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private function createSelector() { |
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$selector = new \stdclass; |
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$selector->type = ''; |
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$selector->string = ''; |
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return $selector; |
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} |
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//XPath only allows registering of static functions... this is a hacky workaround for that |
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public static function processAttr($attr, $element, $hash) { |
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$attr = json_decode($attr, true); |
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$valueParser = self::$instances[$hash]->valueParser; |
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self::$instances[$hash]->functionSet->setElement($element[0]); |
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$parts = self::$instances[$hash]->splitOnToken($attr, Tokenizer::EQUALS); |
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if ($parts[0] === $attr) return $element[0]->getAttribute($valueParser->parseTokens($attr)[0]) !== ''; |
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if ($parts[0][count($parts[0])-1]['type'] === Tokenizer::NOT) { |
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$attr = [ |
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['type' => Tokenizer::NAME, 'value' => 'attr'], |
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['type' => Tokenizer::OPEN_BRACKET, 'value' => $parts[0]], |
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['type' => Tokenizer::NOT], |
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['type' => Tokenizer::EQUALS] |
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]; |
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$attr = array_merge($attr, $parts[1]); |
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} |
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else { |
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$attr = [ |
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['type' => Tokenizer::NAME, 'value' => 'attr'], |
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['type' => Tokenizer::OPEN_BRACKET, 'value' => $parts[0]], |
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['type' => Tokenizer::EQUALS] |
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]; |
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$attr = array_merge($attr, $parts[1]); |
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} |
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return $valueParser->parseTokens($attr)[0]; |
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} |
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View Code Duplication |
private function splitOnToken($tokens, $splitOn) { |
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$splitTokens = []; |
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$i = 0; |
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foreach ($tokens as $token) { |
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if ($token['type'] === $splitOn) $i++; |
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else $splitTokens[$i][] = $token; |
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} |
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return $splitTokens; |
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} |
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//split the css into indivudal functions |
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private function split($css) { |
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$selectors = []; |
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$selector = $this->createSelector(); |
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$selectors[] = $selector; |
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foreach ($css as $token) { |
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if (in_array($token['type'], $this->specialChars)) { |
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$selector = $this->createSelector(); |
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$selector->type = $token['type']; |
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$selectors[] = $selector; |
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} |
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if (isset($token['value'])) $selectors[count($selectors)-1]->string = $token['value']; |
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} |
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return $selectors; |
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} |
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public function getXpath($css) { |
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foreach ($css as $key => $token) { |
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if ($token['type'] === Tokenizer::WHITESPACE && |
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(isset($css[$key+1]) && $css[$key+1]['type'] === Tokenizer::GREATER_THAN)) unset($css[$key]); |
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else if ($token['type'] === Tokenizer::WHITESPACE && |
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(isset($css[$key-1]) && $css[$key-1]['type'] === Tokenizer::GREATER_THAN)) unset($css[$key]); |
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} |
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$css = $this->splitOnToken(array_values($css), Tokenizer::COLON)[0]; |
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$selectors = $this->split($css); |
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$xpath = '/'; |
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foreach ($selectors as $selector) { |
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if (isset($this->translators[$selector->type])) $xpath .= $this->translators[$selector->type]($selector->string, $xpath); |
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} |
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$xpath = str_replace('/[', '/*[', $xpath); |
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return $xpath; |
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} |
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public function getDepth($css) { |
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return count($this->split($css)); |
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} |
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public function getPseudo($css) { |
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$parts = $this->splitOnToken($css, Tokenizer::COLON); |
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array_shift($parts); |
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return $parts; |
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} |
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} |
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Level-2 /
Transphporm
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.