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-rw-r--r--lib/less.php/Visitor/processExtends.php469
1 files changed, 0 insertions, 469 deletions
diff --git a/lib/less.php/Visitor/processExtends.php b/lib/less.php/Visitor/processExtends.php
deleted file mode 100644
index bb5f082..0000000
--- a/lib/less.php/Visitor/processExtends.php
+++ /dev/null
@@ -1,469 +0,0 @@
-<?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
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 21:46:57 +0000