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<?php |
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namespace Ortic\Css2Less\tokens; |
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/** |
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* Class LessRuleList |
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* @package Ortic\Css2Less\tokens |
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*/ |
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class LessRuleList |
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{ |
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private $list = array(); |
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/** |
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* Add a new rule object to our list |
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* @param LessRule $rule |
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*/ |
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public function addRule(LessRule $rule) |
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{ |
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$this->list[] = $rule; |
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} |
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/** |
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* Build and returns a tree for the CSS input |
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* @return array |
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*/ |
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protected function getTree() |
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{ |
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$output = array(); |
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foreach ($this->list as $ruleSet) { |
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$selectors = $ruleSet->getSelectors(); |
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foreach ($ruleSet->getTokens() as $token) { |
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$this->parseTreeNode($output, $selectors, $token); |
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} |
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} |
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return $output; |
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} |
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/** |
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* Add support for direct descendants operator by aligning the spaces properly. |
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* the code below supports "html >p" since we split by spaces. A selector "html > p" would cause an |
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* additional tree level, we therefore normalize them with the two lines below. |
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* |
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* @param string $selector |
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* @return string |
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*/ |
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protected function parseDirectDescendants($selector) |
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{ |
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$selector = str_replace('> ', '>', $selector); |
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$selector = str_replace('>', ' >', $selector); |
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return $selector; |
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} |
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/** |
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* Support for pseudo classes by adding a space before ":" and also "&" to let less know that there |
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* shouldn't be a space when concatenating the nested selectors to a single css rule. We have to |
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* ignore every colon if it's wrapped by :not(...) as we don't nest this in LESS. |
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* |
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* @param string $selector |
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* @return string |
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*/ |
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protected function parsePseudoClasses($selector) |
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{ |
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$nestedPseudo = false; |
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$lastCharacterColon = false; |
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$selectorOut = ''; |
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for ($i = 0; $i < strlen($selector); $i++) { |
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$c = $selector{$i}; |
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// Don't parse anything between (..) and [..] |
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$nestedPseudo = ($c === '(' || $c === '[') || $nestedPseudo; |
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$nestedPseudo = !($c === ')' || $c === ']') && $nestedPseudo; |
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if ($nestedPseudo === false && $c === ':' && $lastCharacterColon === false) { |
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$selectorOut .= ' &'; |
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$lastCharacterColon = true; |
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} |
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else { |
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$lastCharacterColon = false; |
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} |
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$selectorOut .= $c; |
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} |
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return $selectorOut; |
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} |
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protected function parseAdjacentSelect($selector) |
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{ |
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$selectorOut = ''; |
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$adjacentSelectorFound = false; |
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for ($i = 0; $i < strlen($selector); $i++) { |
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$c = $selector{$i}; |
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if ($c == ' ' && $adjacentSelectorFound) { |
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continue; |
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} |
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else { |
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$adjacentSelectorFound = false; |
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} |
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if ($c == '+') { |
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$selectorOut .= '&'; |
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$adjacentSelectorFound = true; |
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} |
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$selectorOut .= $c; |
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} |
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return $selectorOut; |
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} |
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/** |
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* Parse CSS input part into a LESS node |
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* @param $output |
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* @param $selectors |
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* @param $token |
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*/ |
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protected function parseTreeNode(&$output, $selectors, $token) |
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{ |
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foreach ($token->MediaTypes as $mediaType) { |
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// make sure we're aware of our media type |
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if (!array_key_exists($mediaType, $output)) { |
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$output[$mediaType] = array(); |
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} |
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foreach ($selectors as $selector) { |
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// add declaration token to output for each selector |
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$currentNode = &$output[$mediaType]; |
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$selector = $this->parseDirectDescendants($selector); |
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$selector = $this->parsePseudoClasses($selector); |
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$selector = $this->parseAdjacentSelect($selector); |
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// selectors like "html body" must be split into an array so we can |
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// easily nest them |
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$selectorPath = preg_split('[ ]', $selector, -1, PREG_SPLIT_NO_EMPTY); |
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foreach ($selectorPath as $selectorPathItem) { |
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if (!array_key_exists($selectorPathItem, $currentNode)) { |
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$currentNode[$selectorPathItem] = array(); |
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} |
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$currentNode = &$currentNode[$selectorPathItem]; |
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} |
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$currentNode['@rules'][] = $this->formatTokenAsLess($token); |
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} |
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} |
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} |
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/** |
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* Format LESS nodes in a nicer way with indentation and proper brackets |
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* @param $token |
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* @param int $level |
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* @return string |
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*/ |
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public function formatTokenAsLess(\aCssToken $token, $level = 0) |
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{ |
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$indentation = str_repeat("\t", $level); |
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if ($token instanceof \CssRulesetDeclarationToken) { |
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return $indentation . $token->Property . ": " . $token->Value . ($token->IsImportant ? " !important" : "") . ($token->IsLast ? "" : ";"); |
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} elseif ($token instanceof \CssAtKeyframesStartToken) { |
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return $indentation . "@" . $token->AtRuleName . " \"" . $token->Name . "\" {"; |
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} elseif ($token instanceof \CssAtKeyframesRulesetStartToken) { |
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return $indentation . "\t" . implode(",", $token->Selectors) . " {"; |
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} elseif ($token instanceof \CssAtKeyframesRulesetEndToken) { |
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return $indentation . "\t" . "}"; |
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View Code Duplication |
} elseif ($token instanceof \CssAtKeyframesRulesetDeclarationToken) { |
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return $indentation . "\t\t" . $token->Property . ": " . $token->Value . ($token->IsImportant ? " !important" : "") . ($token->IsLast ? "" : ";"); |
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} elseif ($token instanceof \CssAtCharsetToken) { |
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return $indentation . "@charset " . $token->Charset . ";"; |
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} elseif ($token instanceof \CssAtFontFaceStartToken) { |
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return "@font-face {"; |
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View Code Duplication |
} elseif ($token instanceof \CssAtFontFaceDeclarationToken) { |
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return $indentation . "\t" . $token->Property . ": " . $token->Value . ($token->IsImportant ? " !important" : "") . ($token->IsLast ? "" : ";"); |
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} else { |
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return $indentation . $token; |
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} |
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} |
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protected function formatAsLess($selector, $level = 0) |
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{ |
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$return = ''; |
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$indentation = str_repeat("\t", $level); |
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foreach ($selector as $nodeKey => $node) { |
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$return .= $indentation . "{$nodeKey} {\n"; |
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foreach ($node as $subNodeKey => $subNodes) { |
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if ($subNodeKey === '@rules') { |
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foreach ($subNodes as $subNode) { |
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$return .= $indentation . "\t" . $subNode . "\n"; |
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} |
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} else { |
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$return .= $this->formatAsLess(array($subNodeKey => $subNodes), $level + 1); |
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} |
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} |
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$return .= $indentation . "}\n"; |
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} |
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return $return; |
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} |
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public function lessify() |
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{ |
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$tree = $this->getTree(); |
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$return = ''; |
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foreach ($tree as $mediaType => $node) { |
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if ($mediaType == 'all') { |
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$return .= $this->formatAsLess($node); |
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} else { |
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$return .= "@media {$mediaType} {\n"; |
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$return .= $this->formatAsLess($node, 1); |
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$return .= "}\n"; |
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} |
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} |
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return $return; |
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} |
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} |
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ortic /
css2less
Loading history...
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.