diff options
Diffstat (limited to 'lib/less.php/Visitor')
| -rw-r--r-- | lib/less.php/Visitor/extendFinder.php | 114 | ||||
| -rw-r--r-- | lib/less.php/Visitor/import.php | 139 | ||||
| -rw-r--r-- | lib/less.php/Visitor/joinSelector.php | 70 | ||||
| -rw-r--r-- | lib/less.php/Visitor/processExtends.php | 469 | ||||
| -rw-r--r-- | lib/less.php/Visitor/toCSS.php | 292 |
5 files changed, 1084 insertions, 0 deletions
diff --git a/lib/less.php/Visitor/extendFinder.php b/lib/less.php/Visitor/extendFinder.php new file mode 100644 index 0000000..22b3aac --- /dev/null +++ b/lib/less.php/Visitor/extendFinder.php @@ -0,0 +1,114 @@ +<?php + +/** + * Extend Finder Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_extendFinder extends Less_Visitor{ + + public $contexts = array(); + public $allExtendsStack; + public $foundExtends; + + public function __construct(){ + $this->contexts = array(); + $this->allExtendsStack = array(array()); + parent::__construct(); + } + + /** + * @param Less_Tree_Ruleset $root + */ + public function run($root){ + $root = $this->visitObj($root); + $root->allExtends =& $this->allExtendsStack[0]; + return $root; + } + + public function visitRule($ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitRuleset($rulesetNode){ + + if( $rulesetNode->root ){ + return; + } + + $allSelectorsExtendList = array(); + + // get &:extend(.a); rules which apply to all selectors in this ruleset + if( $rulesetNode->rules ){ + foreach($rulesetNode->rules as $rule){ + if( $rule instanceof Less_Tree_Extend ){ + $allSelectorsExtendList[] = $rule; + $rulesetNode->extendOnEveryPath = true; + } + } + } + + + // now find every selector and apply the extends that apply to all extends + // and the ones which apply to an individual extend + foreach($rulesetNode->paths as $selectorPath){ + $selector = end($selectorPath); //$selectorPath[ count($selectorPath)-1]; + + $j = 0; + foreach($selector->extendList as $extend){ + $this->allExtendsStackPush($rulesetNode, $selectorPath, $extend, $j); + } + foreach($allSelectorsExtendList as $extend){ + $this->allExtendsStackPush($rulesetNode, $selectorPath, $extend, $j); + } + } + + $this->contexts[] = $rulesetNode->selectors; + } + + public function allExtendsStackPush($rulesetNode, $selectorPath, $extend, &$j){ + $this->foundExtends = true; + $extend = clone $extend; + $extend->findSelfSelectors( $selectorPath ); + $extend->ruleset = $rulesetNode; + if( $j === 0 ){ + $extend->firstExtendOnThisSelectorPath = true; + } + + $end_key = count($this->allExtendsStack)-1; + $this->allExtendsStack[$end_key][] = $extend; + $j++; + } + + + public function visitRulesetOut( $rulesetNode ){ + if( !is_object($rulesetNode) || !$rulesetNode->root ){ + array_pop($this->contexts); + } + } + + public function visitMedia( $mediaNode ){ + $mediaNode->allExtends = array(); + $this->allExtendsStack[] =& $mediaNode->allExtends; + } + + public function visitMediaOut(){ + array_pop($this->allExtendsStack); + } + + public function visitDirective( $directiveNode ){ + $directiveNode->allExtends = array(); + $this->allExtendsStack[] =& $directiveNode->allExtends; + } + + public function visitDirectiveOut(){ + array_pop($this->allExtendsStack); + } +} + + diff --git a/lib/less.php/Visitor/import.php b/lib/less.php/Visitor/import.php new file mode 100644 index 0000000..f79a36d --- /dev/null +++ b/lib/less.php/Visitor/import.php @@ -0,0 +1,139 @@ +<?php + +/* +class Less_Visitor_import extends Less_VisitorReplacing{ + + public $_visitor; + public $_importer; + public $importCount; + + function __construct( $evalEnv ){ + $this->env = $evalEnv; + $this->importCount = 0; + parent::__construct(); + } + + + function run( $root ){ + $root = $this->visitObj($root); + $this->isFinished = true; + + //if( $this->importCount === 0) { + // $this->_finish(); + //} + } + + function visitImport($importNode, &$visitDeeper ){ + $importVisitor = $this; + $inlineCSS = $importNode->options['inline']; + + if( !$importNode->css || $inlineCSS ){ + $evaldImportNode = $importNode->compileForImport($this->env); + + if( $evaldImportNode && (!$evaldImportNode->css || $inlineCSS) ){ + $importNode = $evaldImportNode; + $this->importCount++; + $env = clone $this->env; + + if( (isset($importNode->options['multiple']) && $importNode->options['multiple']) ){ + $env->importMultiple = true; + } + + //get path & uri + $path_and_uri = null; + if( is_callable(Less_Parser::$options['import_callback']) ){ + $path_and_uri = call_user_func(Less_Parser::$options['import_callback'],$importNode); + } + + if( !$path_and_uri ){ + $path_and_uri = $importNode->PathAndUri(); + } + + if( $path_and_uri ){ + list($full_path, $uri) = $path_and_uri; + }else{ + $full_path = $uri = $importNode->getPath(); + } + + + //import once + if( $importNode->skip( $full_path, $env) ){ + return array(); + } + + if( $importNode->options['inline'] ){ + //todo needs to reference css file not import + //$contents = new Less_Tree_Anonymous($importNode->root, 0, array('filename'=>$importNode->importedFilename), true ); + + Less_Parser::AddParsedFile($full_path); + $contents = new Less_Tree_Anonymous( file_get_contents($full_path), 0, array(), true ); + + if( $importNode->features ){ + return new Less_Tree_Media( array($contents), $importNode->features->value ); + } + + return array( $contents ); + } + + + // css ? + if( $importNode->css ){ + $features = ( $importNode->features ? $importNode->features->compile($env) : null ); + return new Less_Tree_Import( $importNode->compilePath( $env), $features, $importNode->options, $this->index); + } + + return $importNode->ParseImport( $full_path, $uri, $env ); + } + + } + + $visitDeeper = false; + return $importNode; + } + + + function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + return $ruleNode; + } + + function visitDirective($directiveNode, $visitArgs){ + array_unshift($this->env->frames,$directiveNode); + return $directiveNode; + } + + function visitDirectiveOut($directiveNode) { + array_shift($this->env->frames); + } + + function visitMixinDefinition($mixinDefinitionNode, $visitArgs) { + array_unshift($this->env->frames,$mixinDefinitionNode); + return $mixinDefinitionNode; + } + + function visitMixinDefinitionOut($mixinDefinitionNode) { + array_shift($this->env->frames); + } + + function visitRuleset($rulesetNode, $visitArgs) { + array_unshift($this->env->frames,$rulesetNode); + return $rulesetNode; + } + + function visitRulesetOut($rulesetNode) { + array_shift($this->env->frames); + } + + function visitMedia($mediaNode, $visitArgs) { + array_unshift($this->env->frames, $mediaNode->ruleset); + return $mediaNode; + } + + function visitMediaOut($mediaNode) { + array_shift($this->env->frames); + } + +} +*/ + + diff --git a/lib/less.php/Visitor/joinSelector.php b/lib/less.php/Visitor/joinSelector.php new file mode 100644 index 0000000..f62af1a --- /dev/null +++ b/lib/less.php/Visitor/joinSelector.php @@ -0,0 +1,70 @@ +<?php + +/** + * Join Selector Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_joinSelector extends Less_Visitor{ + + public $contexts = array( array() ); + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + return $this->visitObj($root); + } + + public function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitRuleset( $rulesetNode ){ + + $paths = array(); + + if( !$rulesetNode->root ){ + $selectors = array(); + + if( $rulesetNode->selectors && $rulesetNode->selectors ){ + foreach($rulesetNode->selectors as $selector){ + if( $selector->getIsOutput() ){ + $selectors[] = $selector; + } + } + } + + if( !$selectors ){ + $rulesetNode->selectors = null; + $rulesetNode->rules = null; + }else{ + $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1]; + $paths = $rulesetNode->joinSelectors( $context, $selectors); + } + + $rulesetNode->paths = $paths; + } + + $this->contexts[] = $paths; //different from less.js. Placed after joinSelectors() so that $this->contexts will get correct $paths + } + + public function visitRulesetOut(){ + array_pop($this->contexts); + } + + public function visitMedia($mediaNode) { + $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1]; + + if( !count($context) || (is_object($context[0]) && $context[0]->multiMedia) ){ + $mediaNode->rules[0]->root = true; + } + } + +} + diff --git a/lib/less.php/Visitor/processExtends.php b/lib/less.php/Visitor/processExtends.php new file mode 100644 index 0000000..bb5f082 --- /dev/null +++ b/lib/less.php/Visitor/processExtends.php @@ -0,0 +1,469 @@ +<?php + +/** + * Process Extends Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_processExtends extends Less_Visitor{ + + public $allExtendsStack; + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + $extendFinder = new Less_Visitor_extendFinder(); + $extendFinder->run( $root ); + if( !$extendFinder->foundExtends){ + return $root; + } + + $root->allExtends = $this->doExtendChaining( $root->allExtends, $root->allExtends); + + $this->allExtendsStack = array(); + $this->allExtendsStack[] = &$root->allExtends; + + return $this->visitObj( $root ); + } + + private function doExtendChaining( $extendsList, $extendsListTarget, $iterationCount = 0){ + // + // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering and pasting + // the selector we would do normally, but we are also adding an extend with the same target selector + // this means this new extend can then go and alter other extends + // + // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors + // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already processed if + // we look at each selector at a time, as is done in visitRuleset + + $extendsToAdd = array(); + + + //loop through comparing every extend with every target extend. + // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place + // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one + // and the second is the target. + // the separation into two lists allows us to process a subset of chains with a bigger set, as is the + // case when processing media queries + for( $extendIndex = 0, $extendsList_len = count($extendsList); $extendIndex < $extendsList_len; $extendIndex++ ){ + for( $targetExtendIndex = 0; $targetExtendIndex < count($extendsListTarget); $targetExtendIndex++ ){ + + $extend = $extendsList[$extendIndex]; + $targetExtend = $extendsListTarget[$targetExtendIndex]; + + // look for circular references + if( in_array($targetExtend->object_id, $extend->parent_ids,true) ){ + continue; + } + + // find a match in the target extends self selector (the bit before :extend) + $selectorPath = array( $targetExtend->selfSelectors[0] ); + $matches = $this->findMatch( $extend, $selectorPath); + + + if( $matches ){ + + // we found a match, so for each self selector.. + foreach($extend->selfSelectors as $selfSelector ){ + + + // process the extend as usual + $newSelector = $this->extendSelector( $matches, $selectorPath, $selfSelector); + + // but now we create a new extend from it + $newExtend = new Less_Tree_Extend( $targetExtend->selector, $targetExtend->option, 0); + $newExtend->selfSelectors = $newSelector; + + // add the extend onto the list of extends for that selector + end($newSelector)->extendList = array($newExtend); + //$newSelector[ count($newSelector)-1]->extendList = array($newExtend); + + // record that we need to add it. + $extendsToAdd[] = $newExtend; + $newExtend->ruleset = $targetExtend->ruleset; + + //remember its parents for circular references + $newExtend->parent_ids = array_merge($newExtend->parent_ids,$targetExtend->parent_ids,$extend->parent_ids); + + // only process the selector once.. if we have :extend(.a,.b) then multiple + // extends will look at the same selector path, so when extending + // we know that any others will be duplicates in terms of what is added to the css + if( $targetExtend->firstExtendOnThisSelectorPath ){ + $newExtend->firstExtendOnThisSelectorPath = true; + $targetExtend->ruleset->paths[] = $newSelector; + } + } + } + } + } + + if( $extendsToAdd ){ + // try to detect circular references to stop a stack overflow. + // may no longer be needed. $this->extendChainCount++; + if( $iterationCount > 100) { + + try{ + $selectorOne = $extendsToAdd[0]->selfSelectors[0]->toCSS(); + $selectorTwo = $extendsToAdd[0]->selector->toCSS(); + }catch(Exception $e){ + $selectorOne = "{unable to calculate}"; + $selectorTwo = "{unable to calculate}"; + } + + throw new Less_Exception_Parser("extend circular reference detected. One of the circular extends is currently:" . $selectorOne . ":extend(" . $selectorTwo . ")"); + } + + // now process the new extends on the existing rules so that we can handle a extending b extending c ectending d extending e... + $extendsToAdd = $this->doExtendChaining( $extendsToAdd, $extendsListTarget, $iterationCount+1); + } + + return array_merge($extendsList, $extendsToAdd); + } + + + protected function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitSelector( $selectorNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitRuleset($rulesetNode){ + + + if( $rulesetNode->root ){ + return; + } + + $allExtends = end($this->allExtendsStack); + $paths_len = count($rulesetNode->paths); + + // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + foreach($allExtends as $allExtend){ + for($pathIndex = 0; $pathIndex < $paths_len; $pathIndex++ ){ + + // extending extends happens initially, before the main pass + if( isset($rulesetNode->extendOnEveryPath) && $rulesetNode->extendOnEveryPath ){ + continue; + } + + $selectorPath = $rulesetNode->paths[$pathIndex]; + + if( end($selectorPath)->extendList ){ + continue; + } + + $this->ExtendMatch( $rulesetNode, $allExtend, $selectorPath); + + } + } + } + + + private function ExtendMatch( $rulesetNode, $extend, $selectorPath ){ + $matches = $this->findMatch($extend, $selectorPath); + + if( $matches ){ + foreach($extend->selfSelectors as $selfSelector ){ + $rulesetNode->paths[] = $this->extendSelector($matches, $selectorPath, $selfSelector); + } + } + } + + + + private function findMatch($extend, $haystackSelectorPath ){ + + + if( !$this->HasMatches($extend, $haystackSelectorPath) ){ + return false; + } + + + // + // look through the haystack selector path to try and find the needle - extend.selector + // returns an array of selector matches that can then be replaced + // + $needleElements = $extend->selector->elements; + $potentialMatches = array(); + $potentialMatches_len = 0; + $potentialMatch = null; + $matches = array(); + + + + // loop through the haystack elements + $haystack_path_len = count($haystackSelectorPath); + for($haystackSelectorIndex = 0; $haystackSelectorIndex < $haystack_path_len; $haystackSelectorIndex++ ){ + $hackstackSelector = $haystackSelectorPath[$haystackSelectorIndex]; + + $haystack_elements_len = count($hackstackSelector->elements); + for($hackstackElementIndex = 0; $hackstackElementIndex < $haystack_elements_len; $hackstackElementIndex++ ){ + + $haystackElement = $hackstackSelector->elements[$hackstackElementIndex]; + + // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. + if( $extend->allowBefore || ($haystackSelectorIndex === 0 && $hackstackElementIndex === 0) ){ + $potentialMatches[] = array('pathIndex'=> $haystackSelectorIndex, 'index'=> $hackstackElementIndex, 'matched'=> 0, 'initialCombinator'=> $haystackElement->combinator); + $potentialMatches_len++; + } + + for($i = 0; $i < $potentialMatches_len; $i++ ){ + + $potentialMatch = &$potentialMatches[$i]; + $potentialMatch = $this->PotentialMatch( $potentialMatch, $needleElements, $haystackElement, $hackstackElementIndex ); + + + // if we are still valid and have finished, test whether we have elements after and whether these are allowed + if( $potentialMatch && $potentialMatch['matched'] === $extend->selector->elements_len ){ + $potentialMatch['finished'] = true; + + if( !$extend->allowAfter && ($hackstackElementIndex+1 < $haystack_elements_len || $haystackSelectorIndex+1 < $haystack_path_len) ){ + $potentialMatch = null; + } + } + + // if null we remove, if not, we are still valid, so either push as a valid match or continue + if( $potentialMatch ){ + if( $potentialMatch['finished'] ){ + $potentialMatch['length'] = $extend->selector->elements_len; + $potentialMatch['endPathIndex'] = $haystackSelectorIndex; + $potentialMatch['endPathElementIndex'] = $hackstackElementIndex + 1; // index after end of match + $potentialMatches = array(); // we don't allow matches to overlap, so start matching again + $potentialMatches_len = 0; + $matches[] = $potentialMatch; + } + continue; + } + + array_splice($potentialMatches, $i, 1); + $potentialMatches_len--; + $i--; + } + } + } + + return $matches; + } + + + // Before going through all the nested loops, lets check to see if a match is possible + // Reduces Bootstrap 3.1 compile time from ~6.5s to ~5.6s + private function HasMatches($extend, $haystackSelectorPath){ + + if( !$extend->selector->cacheable ){ + return true; + } + + $first_el = $extend->selector->_oelements[0]; + + foreach($haystackSelectorPath as $hackstackSelector){ + if( !$hackstackSelector->cacheable ){ + return true; + } + + if( in_array($first_el, $hackstackSelector->_oelements) ){ + return true; + } + } + + return false; + } + + + /** + * @param integer $hackstackElementIndex + */ + private function PotentialMatch( $potentialMatch, $needleElements, $haystackElement, $hackstackElementIndex ){ + + + if( $potentialMatch['matched'] > 0 ){ + + // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't + // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to work out + // what the resulting combinator will be + $targetCombinator = $haystackElement->combinator; + if( $targetCombinator === '' && $hackstackElementIndex === 0 ){ + $targetCombinator = ' '; + } + + if( $needleElements[ $potentialMatch['matched'] ]->combinator !== $targetCombinator ){ + return null; + } + } + + // if we don't match, null our match to indicate failure + if( !$this->isElementValuesEqual( $needleElements[$potentialMatch['matched'] ]->value, $haystackElement->value) ){ + return null; + } + + $potentialMatch['finished'] = false; + $potentialMatch['matched']++; + + return $potentialMatch; + } + + + private function isElementValuesEqual( $elementValue1, $elementValue2 ){ + + if( $elementValue1 === $elementValue2 ){ + return true; + } + + if( is_string($elementValue1) || is_string($elementValue2) ) { + return false; + } + + if( $elementValue1 instanceof Less_Tree_Attribute ){ + return $this->isAttributeValuesEqual( $elementValue1, $elementValue2 ); + } + + $elementValue1 = $elementValue1->value; + if( $elementValue1 instanceof Less_Tree_Selector ){ + return $this->isSelectorValuesEqual( $elementValue1, $elementValue2 ); + } + + return false; + } + + + /** + * @param Less_Tree_Selector $elementValue1 + */ + private function isSelectorValuesEqual( $elementValue1, $elementValue2 ){ + + $elementValue2 = $elementValue2->value; + if( !($elementValue2 instanceof Less_Tree_Selector) || $elementValue1->elements_len !== $elementValue2->elements_len ){ + return false; + } + + for( $i = 0; $i < $elementValue1->elements_len; $i++ ){ + + if( $elementValue1->elements[$i]->combinator !== $elementValue2->elements[$i]->combinator ){ + if( $i !== 0 || ($elementValue1->elements[$i]->combinator || ' ') !== ($elementValue2->elements[$i]->combinator || ' ') ){ + return false; + } + } + + if( !$this->isElementValuesEqual($elementValue1->elements[$i]->value, $elementValue2->elements[$i]->value) ){ + return false; + } + } + + return true; + } + + + /** + * @param Less_Tree_Attribute $elementValue1 + */ + private function isAttributeValuesEqual( $elementValue1, $elementValue2 ){ + + if( $elementValue1->op !== $elementValue2->op || $elementValue1->key !== $elementValue2->key ){ + return false; + } + + if( !$elementValue1->value || !$elementValue2->value ){ + if( $elementValue1->value || $elementValue2->value ) { + return false; + } + return true; + } + + $elementValue1 = ($elementValue1->value->value ? $elementValue1->value->value : $elementValue1->value ); + $elementValue2 = ($elementValue2->value->value ? $elementValue2->value->value : $elementValue2->value ); + + return $elementValue1 === $elementValue2; + } + + + private function extendSelector($matches, $selectorPath, $replacementSelector){ + + //for a set of matches, replace each match with the replacement selector + + $currentSelectorPathIndex = 0; + $currentSelectorPathElementIndex = 0; + $path = array(); + $selectorPath_len = count($selectorPath); + + for($matchIndex = 0, $matches_len = count($matches); $matchIndex < $matches_len; $matchIndex++ ){ + + + $match = $matches[$matchIndex]; + $selector = $selectorPath[ $match['pathIndex'] ]; + + $firstElement = new Less_Tree_Element( + $match['initialCombinator'], + $replacementSelector->elements[0]->value, + $replacementSelector->elements[0]->index, + $replacementSelector->elements[0]->currentFileInfo + ); + + if( $match['pathIndex'] > $currentSelectorPathIndex && $currentSelectorPathElementIndex > 0 ){ + $last_path = end($path); + $last_path->elements = array_merge( $last_path->elements, array_slice( $selectorPath[$currentSelectorPathIndex]->elements, $currentSelectorPathElementIndex)); + $currentSelectorPathElementIndex = 0; + $currentSelectorPathIndex++; + } + + $newElements = array_merge( + array_slice($selector->elements, $currentSelectorPathElementIndex, ($match['index'] - $currentSelectorPathElementIndex) ) // last parameter of array_slice is different than the last parameter of javascript's slice + , array($firstElement) + , array_slice($replacementSelector->elements,1) + ); + + if( $currentSelectorPathIndex === $match['pathIndex'] && $matchIndex > 0 ){ + $last_key = count($path)-1; + $path[$last_key]->elements = array_merge($path[$last_key]->elements,$newElements); + }else{ + $path = array_merge( $path, array_slice( $selectorPath, $currentSelectorPathIndex, $match['pathIndex'] )); + $path[] = new Less_Tree_Selector( $newElements ); + } + + $currentSelectorPathIndex = $match['endPathIndex']; + $currentSelectorPathElementIndex = $match['endPathElementIndex']; + if( $currentSelectorPathElementIndex >= count($selectorPath[$currentSelectorPathIndex]->elements) ){ + $currentSelectorPathElementIndex = 0; + $currentSelectorPathIndex++; + } + } + + if( $currentSelectorPathIndex < $selectorPath_len && $currentSelectorPathElementIndex > 0 ){ + $last_path = end($path); + $last_path->elements = array_merge( $last_path->elements, array_slice($selectorPath[$currentSelectorPathIndex]->elements, $currentSelectorPathElementIndex)); + $currentSelectorPathIndex++; + } + + $slice_len = $selectorPath_len - $currentSelectorPathIndex; + $path = array_merge($path, array_slice($selectorPath, $currentSelectorPathIndex, $slice_len)); + + return $path; + } + + + protected function visitMedia( $mediaNode ){ + $newAllExtends = array_merge( $mediaNode->allExtends, end($this->allExtendsStack) ); + $this->allExtendsStack[] = $this->doExtendChaining($newAllExtends, $mediaNode->allExtends); + } + + protected function visitMediaOut(){ + array_pop( $this->allExtendsStack ); + } + + protected function visitDirective( $directiveNode ){ + $newAllExtends = array_merge( $directiveNode->allExtends, end($this->allExtendsStack) ); + $this->allExtendsStack[] = $this->doExtendChaining($newAllExtends, $directiveNode->allExtends); + } + + protected function visitDirectiveOut(){ + array_pop($this->allExtendsStack); + } + +}
\ No newline at end of file diff --git a/lib/less.php/Visitor/toCSS.php b/lib/less.php/Visitor/toCSS.php new file mode 100644 index 0000000..8aaca96 --- /dev/null +++ b/lib/less.php/Visitor/toCSS.php @@ -0,0 +1,292 @@ +<?php + +/** + * toCSS Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_toCSS extends Less_VisitorReplacing{ + + private $charset; + + public function __construct(){ + parent::__construct(); + } + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + return $this->visitObj($root); + } + + public function visitRule( $ruleNode ){ + if( $ruleNode->variable ){ + return array(); + } + return $ruleNode; + } + + public function visitMixinDefinition($mixinNode){ + // mixin definitions do not get eval'd - this means they keep state + // so we have to clear that state here so it isn't used if toCSS is called twice + $mixinNode->frames = array(); + return array(); + } + + public function visitExtend(){ + return array(); + } + + public function visitComment( $commentNode ){ + if( $commentNode->isSilent() ){ + return array(); + } + return $commentNode; + } + + public function visitMedia( $mediaNode, &$visitDeeper ){ + $mediaNode->accept($this); + $visitDeeper = false; + + if( !$mediaNode->rules ){ + return array(); + } + return $mediaNode; + } + + public function visitDirective( $directiveNode ){ + if( isset($directiveNode->currentFileInfo['reference']) && (!property_exists($directiveNode,'isReferenced') || !$directiveNode->isReferenced) ){ + return array(); + } + if( $directiveNode->name === '@charset' ){ + // Only output the debug info together with subsequent @charset definitions + // a comment (or @media statement) before the actual @charset directive would + // be considered illegal css as it has to be on the first line + if( isset($this->charset) && $this->charset ){ + + //if( $directiveNode->debugInfo ){ + // $comment = new Less_Tree_Comment('/* ' . str_replace("\n",'',$directiveNode->toCSS())." */\n"); + // $comment->debugInfo = $directiveNode->debugInfo; + // return $this->visit($comment); + //} + + + return array(); + } + $this->charset = true; + } + return $directiveNode; + } + + public function checkPropertiesInRoot( $rulesetNode ){ + + if( !$rulesetNode->firstRoot ){ + return; + } + + foreach($rulesetNode->rules as $ruleNode){ + if( $ruleNode instanceof Less_Tree_Rule && !$ruleNode->variable ){ + $msg = "properties must be inside selector blocks, they cannot be in the root. Index ".$ruleNode->index.($ruleNode->currentFileInfo ? (' Filename: '.$ruleNode->currentFileInfo['filename']) : null); + throw new Less_Exception_Compiler($msg); + } + } + } + + + public function visitRuleset( $rulesetNode, &$visitDeeper ){ + + $visitDeeper = false; + + $this->checkPropertiesInRoot( $rulesetNode ); + + if( $rulesetNode->root ){ + return $this->visitRulesetRoot( $rulesetNode ); + } + + $rulesets = array(); + $rulesetNode->paths = $this->visitRulesetPaths($rulesetNode); + + + // Compile rules and rulesets + $nodeRuleCnt = $rulesetNode->rules?count($rulesetNode->rules):0; + for( $i = 0; $i < $nodeRuleCnt; ){ + $rule = $rulesetNode->rules[$i]; + + if( property_exists($rule,'rules') ){ + // visit because we are moving them out from being a child + $rulesets[] = $this->visitObj($rule); + array_splice($rulesetNode->rules,$i,1); + $nodeRuleCnt--; + continue; + } + $i++; + } + + + // accept the visitor to remove rules and refactor itself + // then we can decide now whether we want it or not + if( $nodeRuleCnt > 0 ){ + $rulesetNode->accept($this); + + if( $rulesetNode->rules ){ + + if( count($rulesetNode->rules) > 1 ){ + $this->_mergeRules( $rulesetNode->rules ); + $this->_removeDuplicateRules( $rulesetNode->rules ); + } + + // now decide whether we keep the ruleset + if( $rulesetNode->paths ){ + //array_unshift($rulesets, $rulesetNode); + array_splice($rulesets,0,0,array($rulesetNode)); + } + } + + } + + + if( count($rulesets) === 1 ){ + return $rulesets[0]; + } + return $rulesets; + } + + + /** + * Helper function for visitiRuleset + * + * return array|Less_Tree_Ruleset + */ + private function visitRulesetRoot( $rulesetNode ){ + $rulesetNode->accept( $this ); + if( $rulesetNode->firstRoot || $rulesetNode->rules ){ + return $rulesetNode; + } + return array(); + } + + + /** + * Helper function for visitRuleset() + * + * @return array + */ + private function visitRulesetPaths($rulesetNode){ + + $paths = array(); + foreach($rulesetNode->paths as $p){ + if( $p[0]->elements[0]->combinator === ' ' ){ + $p[0]->elements[0]->combinator = ''; + } + + foreach($p as $pi){ + if( $pi->getIsReferenced() && $pi->getIsOutput() ){ + $paths[] = $p; + break; + } + } + } + + return $paths; + } + + protected function _removeDuplicateRules( &$rules ){ + // remove duplicates + $ruleCache = array(); + for( $i = count($rules)-1; $i >= 0 ; $i-- ){ + $rule = $rules[$i]; + if( $rule instanceof Less_Tree_Rule || $rule instanceof Less_Tree_NameValue ){ + + if( !isset($ruleCache[$rule->name]) ){ + $ruleCache[$rule->name] = $rule; + }else{ + $ruleList =& $ruleCache[$rule->name]; + + if( $ruleList instanceof Less_Tree_Rule || $ruleList instanceof Less_Tree_NameValue ){ + $ruleList = $ruleCache[$rule->name] = array( $ruleCache[$rule->name]->toCSS() ); + } + + $ruleCSS = $rule->toCSS(); + if( array_search($ruleCSS,$ruleList) !== false ){ + array_splice($rules,$i,1); + }else{ + $ruleList[] = $ruleCSS; + } + } + } + } + } + + protected function _mergeRules( &$rules ){ + $groups = array(); + + //obj($rules); + + $rules_len = count($rules); + for( $i = 0; $i < $rules_len; $i++ ){ + $rule = $rules[$i]; + + if( ($rule instanceof Less_Tree_Rule) && $rule->merge ){ + + $key = $rule->name; + if( $rule->important ){ + $key .= ',!'; + } + + if( !isset($groups[$key]) ){ + $groups[$key] = array(); + }else{ + array_splice($rules, $i--, 1); + $rules_len--; + } + + $groups[$key][] = $rule; + } + } + + + foreach($groups as $parts){ + + if( count($parts) > 1 ){ + $rule = $parts[0]; + $spacedGroups = array(); + $lastSpacedGroup = array(); + $parts_mapped = array(); + foreach($parts as $p){ + if( $p->merge === '+' ){ + if( $lastSpacedGroup ){ + $spacedGroups[] = self::toExpression($lastSpacedGroup); + } + $lastSpacedGroup = array(); + } + $lastSpacedGroup[] = $p; + } + + $spacedGroups[] = self::toExpression($lastSpacedGroup); + $rule->value = self::toValue($spacedGroups); + } + } + + } + + public static function toExpression($values){ + $mapped = array(); + foreach($values as $p){ + $mapped[] = $p->value; + } + return new Less_Tree_Expression( $mapped ); + } + + public static function toValue($values){ + //return new Less_Tree_Value($values); ?? + + $mapped = array(); + foreach($values as $p){ + $mapped[] = $p; + } + return new Less_Tree_Value($mapped); + } +} + |