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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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/** Parses a .tss file into individual rules, each rule has a query e,g, `ul li` and a set of rules e.g. `display: none; bind: iteration(id);` */ |
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class Sheet { |
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private $tss; |
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private $baseDir; |
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private $valueParser; |
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private $xPath; |
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public function __construct($tss, $baseDir, CssToXpath $xPath, Value $valueParser) { |
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$this->tss = $this->stripComments($tss, '//', "\n"); |
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$this->tss = $this->stripComments($this->tss, '/*', '*/'); |
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$tokenizer = new Tokenizer($this->tss); |
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$this->tss = $tokenizer->getTokens(); |
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$this->baseDir = $baseDir; |
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$this->xPath = $xPath; |
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$this->valueParser = $valueParser; |
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} |
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public function parse($indexStart = 0) { |
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$rules = []; |
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$numOfTokens = count($this->tss); |
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for ($i = 0; isset($this->tss[$i]) && $i <= $numOfTokens; $i++) { |
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if ($this->tss[$i]['type'] === Tokenizer::WHITESPACE) continue; |
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if ($processing = $this->processingInstructions($i, count($rules)+$indexStart)) { |
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$i = $processing['endPos']+1; |
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$rules = array_merge($rules, $processing['rules']); |
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continue; |
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} |
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$tokens = array_slice($this->tss, $i); |
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$selector = $this->splitOnToken($tokens, Tokenizer::OPEN_BRACE)[0]; |
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$i += count($selector); |
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if ($selector[count($selector)-1]['type'] === Tokenizer::WHITESPACE) array_pop($selector); |
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if (!isset($this->tss[$i])) break; |
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$newRules = $this->cssToRules($selector, count($rules)+$indexStart, $this->getProperties($this->tss[$i]['value'])); |
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$rules = $this->writeRule($rules, $newRules); |
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} |
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usort($rules, [$this, 'sortRules']); |
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if (empty($rules) && !empty($this->tss)) throw new \Exception("No TSS rules parsed"); |
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return $rules; |
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} |
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private function CssToRules($selector, $index, $properties) { |
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$parts = $this->splitOnToken($selector, Tokenizer::ARG); |
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$rules = []; |
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foreach ($parts as $part) { |
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$tokenCss = $part; |
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$rules[json_encode($part)] = new \Transphporm\Rule($this->xPath->getXpath($tokenCss), $this->xPath->getPseudo($tokenCss), $this->xPath->getDepth($tokenCss), $this->baseDir, $index++); |
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$rules[json_encode($part)]->properties = $properties; |
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} |
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return $rules; |
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} |
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private function writeRule($rules, $newRules) { |
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foreach ($newRules as $selector => $newRule) { |
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if (isset($rules[$selector])) { |
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$newRule->properties = array_merge($rules[$selector]->properties, $newRule->properties); |
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} |
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$rules[$selector] = $newRule; |
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} |
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return $rules; |
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} |
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private function processingInstructions($key, $indexStart) { |
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if (isset($this->tss[$key]) && $this->tss[$key]['type'] !== Tokenizer::AT_SIGN) return false; |
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$rules = []; |
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$tokens = array_slice($this->tss, $key+1); |
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$tokens = $this->splitOnToken($tokens, Tokenizer::SEMI_COLON)[0]; |
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$pos = $key+count($tokens)+1; |
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$funcName = array_shift($tokens)['value']; |
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$args = $this->valueParser->parseTokens($tokens); |
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$rules = array_merge($rules, $this->$funcName($args, $indexStart)); |
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return ['endPos' => $pos, 'rules' => $rules]; |
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} |
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private function import($args, $indexStart) { |
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$fileName = $args[0]; |
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$sheet = new Sheet(file_get_contents($this->baseDir . $fileName), dirname(realpath($this->baseDir . $fileName)) . DIRECTORY_SEPARATOR, $this->xPath, $this->valueParser); |
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return $sheet->parse($indexStart); |
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} |
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private function sortRules($a, $b) { |
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//If they have the same depth, compare on index |
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if ($a->depth === $b->depth) return $a->index < $b->index ? -1 : 1; |
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return ($a->depth < $b->depth) ? -1 : 1; |
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} |
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private function stripComments($str, $open, $close) { |
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$pos = 0; |
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while (($pos = strpos($str, $open, $pos)) !== false) { |
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$end = strpos($str, $close, $pos); |
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if ($end === false) break; |
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$str = substr_replace($str, '', $pos, $end-$pos+strlen($close)); |
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} |
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return $str; |
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} |
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View Code Duplication |
private function splitOnToken($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 $splitTokens; |
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} |
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private function removeWhitespace($tokens) { |
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$newTokens = []; |
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foreach ($tokens as $token) { |
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if ($token['type'] !== Tokenizer::WHITESPACE) $newTokens[] = $token; |
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} |
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return $newTokens; |
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} |
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private function getProperties($tokens) { |
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$rules = $this->splitOnToken($tokens, Tokenizer::SEMI_COLON); |
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$return = []; |
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foreach ($rules as $rule) { |
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$rule = $this->removeWhitespace($rule); |
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if (isset($rule[1]) && $rule[1]['type'] === Tokenizer::COLON) $return[$rule[0]['value']] = array_slice($rule, 2); |
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} |
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return $return; |
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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.