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-rw-r--r--lib/less.php/Tree/Ruleset.php643
1 files changed, 643 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Ruleset.php b/lib/less.php/Tree/Ruleset.php
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index 0000000..bdf9fec
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+++ b/lib/less.php/Tree/Ruleset.php
@@ -0,0 +1,643 @@
+<?php
+
+/**
+ * Ruleset
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Ruleset extends Less_Tree{
+
+ protected $lookups;
+ public $_variables;
+ public $_rulesets;
+
+ public $strictImports;
+
+ public $selectors;
+ public $rules;
+ public $root;
+ public $allowImports;
+ public $paths;
+ public $firstRoot;
+ public $type = 'Ruleset';
+ public $multiMedia;
+ public $allExtends;
+
+ public $ruleset_id;
+ public $originalRuleset;
+
+ public $first_oelements;
+
+ public function SetRulesetIndex(){
+ $this->ruleset_id = Less_Parser::$next_id++;
+ $this->originalRuleset = $this->ruleset_id;
+
+ if( $this->selectors ){
+ foreach($this->selectors as $sel){
+ if( $sel->_oelements ){
+ $this->first_oelements[$sel->_oelements[0]] = true;
+ }
+ }
+ }
+ }
+
+ public function __construct($selectors, $rules, $strictImports = null){
+ $this->selectors = $selectors;
+ $this->rules = $rules;
+ $this->lookups = array();
+ $this->strictImports = $strictImports;
+ $this->SetRulesetIndex();
+ }
+
+ public function accept( $visitor ){
+ if( $this->paths ){
+ $paths_len = count($this->paths);
+ for($i = 0,$paths_len; $i < $paths_len; $i++ ){
+ $this->paths[$i] = $visitor->visitArray($this->paths[$i]);
+ }
+ }elseif( $this->selectors ){
+ $this->selectors = $visitor->visitArray($this->selectors);
+ }
+
+ if( $this->rules ){
+ $this->rules = $visitor->visitArray($this->rules);
+ }
+ }
+
+ public function compile($env){
+
+ $ruleset = $this->PrepareRuleset($env);
+
+
+ // Store the frames around mixin definitions,
+ // so they can be evaluated like closures when the time comes.
+ $rsRuleCnt = count($ruleset->rules);
+ for( $i = 0; $i < $rsRuleCnt; $i++ ){
+ if( $ruleset->rules[$i] instanceof Less_Tree_Mixin_Definition || $ruleset->rules[$i] instanceof Less_Tree_DetachedRuleset ){
+ $ruleset->rules[$i] = $ruleset->rules[$i]->compile($env);
+ }
+ }
+
+ $mediaBlockCount = 0;
+ if( $env instanceof Less_Environment ){
+ $mediaBlockCount = count($env->mediaBlocks);
+ }
+
+ // Evaluate mixin calls.
+ $this->EvalMixinCalls( $ruleset, $env, $rsRuleCnt );
+
+
+ // Evaluate everything else
+ for( $i=0; $i<$rsRuleCnt; $i++ ){
+ if(! ($ruleset->rules[$i] instanceof Less_Tree_Mixin_Definition || $ruleset->rules[$i] instanceof Less_Tree_DetachedRuleset) ){
+ $ruleset->rules[$i] = $ruleset->rules[$i]->compile($env);
+ }
+ }
+
+ // Evaluate everything else
+ for( $i=0; $i<$rsRuleCnt; $i++ ){
+ $rule = $ruleset->rules[$i];
+
+ // for rulesets, check if it is a css guard and can be removed
+ if( $rule instanceof Less_Tree_Ruleset && $rule->selectors && count($rule->selectors) === 1 ){
+
+ // check if it can be folded in (e.g. & where)
+ if( $rule->selectors[0]->isJustParentSelector() ){
+ array_splice($ruleset->rules,$i--,1);
+ $rsRuleCnt--;
+
+ for($j = 0; $j < count($rule->rules); $j++ ){
+ $subRule = $rule->rules[$j];
+ if( !($subRule instanceof Less_Tree_Rule) || !$subRule->variable ){
+ array_splice($ruleset->rules, ++$i, 0, array($subRule));
+ $rsRuleCnt++;
+ }
+ }
+
+ }
+ }
+ }
+
+
+ // Pop the stack
+ $env->shiftFrame();
+
+ if ($mediaBlockCount) {
+ $len = count($env->mediaBlocks);
+ for($i = $mediaBlockCount; $i < $len; $i++ ){
+ $env->mediaBlocks[$i]->bubbleSelectors($ruleset->selectors);
+ }
+ }
+
+ return $ruleset;
+ }
+
+ /**
+ * Compile Less_Tree_Mixin_Call objects
+ *
+ * @param Less_Tree_Ruleset $ruleset
+ * @param integer $rsRuleCnt
+ */
+ private function EvalMixinCalls( $ruleset, $env, &$rsRuleCnt ){
+ for($i=0; $i < $rsRuleCnt; $i++){
+ $rule = $ruleset->rules[$i];
+
+ if( $rule instanceof Less_Tree_Mixin_Call ){
+ $rule = $rule->compile($env);
+
+ $temp = array();
+ foreach($rule as $r){
+ if( ($r instanceof Less_Tree_Rule) && $r->variable ){
+ // do not pollute the scope if the variable is
+ // already there. consider returning false here
+ // but we need a way to "return" variable from mixins
+ if( !$ruleset->variable($r->name) ){
+ $temp[] = $r;
+ }
+ }else{
+ $temp[] = $r;
+ }
+ }
+ $temp_count = count($temp)-1;
+ array_splice($ruleset->rules, $i, 1, $temp);
+ $rsRuleCnt += $temp_count;
+ $i += $temp_count;
+ $ruleset->resetCache();
+
+ }elseif( $rule instanceof Less_Tree_RulesetCall ){
+
+ $rule = $rule->compile($env);
+ $rules = array();
+ foreach($rule->rules as $r){
+ if( ($r instanceof Less_Tree_Rule) && $r->variable ){
+ continue;
+ }
+ $rules[] = $r;
+ }
+
+ array_splice($ruleset->rules, $i, 1, $rules);
+ $temp_count = count($rules);
+ $rsRuleCnt += $temp_count - 1;
+ $i += $temp_count-1;
+ $ruleset->resetCache();
+ }
+
+ }
+ }
+
+
+ /**
+ * Compile the selectors and create a new ruleset object for the compile() method
+ *
+ */
+ private function PrepareRuleset($env){
+
+ $hasOnePassingSelector = false;
+ $selectors = array();
+ if( $this->selectors ){
+ Less_Tree_DefaultFunc::error("it is currently only allowed in parametric mixin guards,");
+
+ foreach($this->selectors as $s){
+ $selector = $s->compile($env);
+ $selectors[] = $selector;
+ if( $selector->evaldCondition ){
+ $hasOnePassingSelector = true;
+ }
+ }
+
+ Less_Tree_DefaultFunc::reset();
+ } else {
+ $hasOnePassingSelector = true;
+ }
+
+ if( $this->rules && $hasOnePassingSelector ){
+ $rules = $this->rules;
+ }else{
+ $rules = array();
+ }
+
+ $ruleset = new Less_Tree_Ruleset($selectors, $rules, $this->strictImports);
+
+ $ruleset->originalRuleset = $this->ruleset_id;
+
+ $ruleset->root = $this->root;
+ $ruleset->firstRoot = $this->firstRoot;
+ $ruleset->allowImports = $this->allowImports;
+
+
+ // push the current ruleset to the frames stack
+ $env->unshiftFrame($ruleset);
+
+
+ // Evaluate imports
+ if( $ruleset->root || $ruleset->allowImports || !$ruleset->strictImports ){
+ $ruleset->evalImports($env);
+ }
+
+ return $ruleset;
+ }
+
+ function evalImports($env) {
+
+ $rules_len = count($this->rules);
+ for($i=0; $i < $rules_len; $i++){
+ $rule = $this->rules[$i];
+
+ if( $rule instanceof Less_Tree_Import ){
+ $rules = $rule->compile($env);
+ if( is_array($rules) ){
+ array_splice($this->rules, $i, 1, $rules);
+ $temp_count = count($rules)-1;
+ $i += $temp_count;
+ $rules_len += $temp_count;
+ }else{
+ array_splice($this->rules, $i, 1, array($rules));
+ }
+
+ $this->resetCache();
+ }
+ }
+ }
+
+ function makeImportant(){
+
+ $important_rules = array();
+ foreach($this->rules as $rule){
+ if( $rule instanceof Less_Tree_Rule || $rule instanceof Less_Tree_Ruleset || $rule instanceof Less_Tree_NameValue ){
+ $important_rules[] = $rule->makeImportant();
+ }else{
+ $important_rules[] = $rule;
+ }
+ }
+
+ return new Less_Tree_Ruleset($this->selectors, $important_rules, $this->strictImports );
+ }
+
+ public function matchArgs($args){
+ return !$args;
+ }
+
+ // lets you call a css selector with a guard
+ public function matchCondition( $args, $env ){
+ $lastSelector = end($this->selectors);
+
+ if( !$lastSelector->evaldCondition ){
+ return false;
+ }
+ if( $lastSelector->condition && !$lastSelector->condition->compile( $env->copyEvalEnv( $env->frames ) ) ){
+ return false;
+ }
+ return true;
+ }
+
+ function resetCache(){
+ $this->_rulesets = null;
+ $this->_variables = null;
+ $this->lookups = array();
+ }
+
+ public function variables(){
+ $this->_variables = array();
+ foreach( $this->rules as $r){
+ if ($r instanceof Less_Tree_Rule && $r->variable === true) {
+ $this->_variables[$r->name] = $r;
+ }
+ }
+ }
+
+ public function variable($name){
+
+ if( is_null($this->_variables) ){
+ $this->variables();
+ }
+ return isset($this->_variables[$name]) ? $this->_variables[$name] : null;
+ }
+
+ public function find( $selector, $self = null ){
+
+ $key = implode(' ',$selector->_oelements);
+
+ if( !isset($this->lookups[$key]) ){
+
+ if( !$self ){
+ $self = $this->ruleset_id;
+ }
+
+ $this->lookups[$key] = array();
+
+ $first_oelement = $selector->_oelements[0];
+
+ foreach($this->rules as $rule){
+ if( $rule instanceof Less_Tree_Ruleset && $rule->ruleset_id != $self ){
+
+ if( isset($rule->first_oelements[$first_oelement]) ){
+
+ foreach( $rule->selectors as $ruleSelector ){
+ $match = $selector->match($ruleSelector);
+ if( $match ){
+ if( $selector->elements_len > $match ){
+ $this->lookups[$key] = array_merge($this->lookups[$key], $rule->find( new Less_Tree_Selector(array_slice($selector->elements, $match)), $self));
+ } else {
+ $this->lookups[$key][] = $rule;
+ }
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return $this->lookups[$key];
+ }
+
+
+ /**
+ * @see Less_Tree::genCSS
+ */
+ public function genCSS( $output ){
+
+ if( !$this->root ){
+ Less_Environment::$tabLevel++;
+ }
+
+ $tabRuleStr = $tabSetStr = '';
+ if( !Less_Parser::$options['compress'] ){
+ if( Less_Environment::$tabLevel ){
+ $tabRuleStr = "\n".str_repeat( Less_Parser::$options['indentation'] , Less_Environment::$tabLevel );
+ $tabSetStr = "\n".str_repeat( Less_Parser::$options['indentation'] , Less_Environment::$tabLevel-1 );
+ }else{
+ $tabSetStr = $tabRuleStr = "\n";
+ }
+ }
+
+
+ $ruleNodes = array();
+ $rulesetNodes = array();
+ foreach($this->rules as $rule){
+
+ $class = get_class($rule);
+ if( ($class === 'Less_Tree_Media') || ($class === 'Less_Tree_Directive') || ($this->root && $class === 'Less_Tree_Comment') || ($class === 'Less_Tree_Ruleset' && $rule->rules) ){
+ $rulesetNodes[] = $rule;
+ }else{
+ $ruleNodes[] = $rule;
+ }
+ }
+
+ // If this is the root node, we don't render
+ // a selector, or {}.
+ if( !$this->root ){
+
+ /*
+ debugInfo = tree.debugInfo(env, this, tabSetStr);
+
+ if (debugInfo) {
+ output.add(debugInfo);
+ output.add(tabSetStr);
+ }
+ */
+
+ $paths_len = count($this->paths);
+ for( $i = 0; $i < $paths_len; $i++ ){
+ $path = $this->paths[$i];
+ $firstSelector = true;
+
+ foreach($path as $p){
+ $p->genCSS( $output, $firstSelector );
+ $firstSelector = false;
+ }
+
+ if( $i + 1 < $paths_len ){
+ $output->add( ',' . $tabSetStr );
+ }
+ }
+
+ $output->add( (Less_Parser::$options['compress'] ? '{' : " {") . $tabRuleStr );
+ }
+
+ // Compile rules and rulesets
+ $ruleNodes_len = count($ruleNodes);
+ $rulesetNodes_len = count($rulesetNodes);
+ for( $i = 0; $i < $ruleNodes_len; $i++ ){
+ $rule = $ruleNodes[$i];
+
+ // @page{ directive ends up with root elements inside it, a mix of rules and rulesets
+ // In this instance we do not know whether it is the last property
+ if( $i + 1 === $ruleNodes_len && (!$this->root || $rulesetNodes_len === 0 || $this->firstRoot ) ){
+ Less_Environment::$lastRule = true;
+ }
+
+ $rule->genCSS( $output );
+
+ if( !Less_Environment::$lastRule ){
+ $output->add( $tabRuleStr );
+ }else{
+ Less_Environment::$lastRule = false;
+ }
+ }
+
+ if( !$this->root ){
+ $output->add( $tabSetStr . '}' );
+ Less_Environment::$tabLevel--;
+ }
+
+ $firstRuleset = true;
+ $space = ($this->root ? $tabRuleStr : $tabSetStr);
+ for( $i = 0; $i < $rulesetNodes_len; $i++ ){
+
+ if( $ruleNodes_len && $firstRuleset ){
+ $output->add( $space );
+ }elseif( !$firstRuleset ){
+ $output->add( $space );
+ }
+ $firstRuleset = false;
+ $rulesetNodes[$i]->genCSS( $output);
+ }
+
+ if( !Less_Parser::$options['compress'] && $this->firstRoot ){
+ $output->add( "\n" );
+ }
+
+ }
+
+
+ function markReferenced(){
+ if( !$this->selectors ){
+ return;
+ }
+ foreach($this->selectors as $selector){
+ $selector->markReferenced();
+ }
+ }
+
+ public function joinSelectors( $context, $selectors ){
+ $paths = array();
+ if( is_array($selectors) ){
+ foreach($selectors as $selector) {
+ $this->joinSelector( $paths, $context, $selector);
+ }
+ }
+ return $paths;
+ }
+
+ public function joinSelector( &$paths, $context, $selector){
+
+ $hasParentSelector = false;
+
+ foreach($selector->elements as $el) {
+ if( $el->value === '&') {
+ $hasParentSelector = true;
+ }
+ }
+
+ if( !$hasParentSelector ){
+ if( $context ){
+ foreach($context as $context_el){
+ $paths[] = array_merge($context_el, array($selector) );
+ }
+ }else {
+ $paths[] = array($selector);
+ }
+ return;
+ }
+
+
+ // The paths are [[Selector]]
+ // The first list is a list of comma separated selectors
+ // The inner list is a list of inheritance separated selectors
+ // e.g.
+ // .a, .b {
+ // .c {
+ // }
+ // }
+ // == [[.a] [.c]] [[.b] [.c]]
+ //
+
+ // the elements from the current selector so far
+ $currentElements = array();
+ // the current list of new selectors to add to the path.
+ // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors
+ // by the parents
+ $newSelectors = array(array());
+
+
+ foreach( $selector->elements as $el){
+
+ // non parent reference elements just get added
+ if( $el->value !== '&' ){
+ $currentElements[] = $el;
+ } else {
+ // the new list of selectors to add
+ $selectorsMultiplied = array();
+
+ // merge the current list of non parent selector elements
+ // on to the current list of selectors to add
+ if( $currentElements ){
+ $this->mergeElementsOnToSelectors( $currentElements, $newSelectors);
+ }
+
+ // loop through our current selectors
+ foreach($newSelectors as $sel){
+
+ // if we don't have any parent paths, the & might be in a mixin so that it can be used
+ // whether there are parents or not
+ if( !$context ){
+ // the combinator used on el should now be applied to the next element instead so that
+ // it is not lost
+ if( $sel ){
+ $sel[0]->elements = array_slice($sel[0]->elements,0);
+ $sel[0]->elements[] = new Less_Tree_Element($el->combinator, '', $el->index, $el->currentFileInfo );
+ }
+ $selectorsMultiplied[] = $sel;
+ }else {
+
+ // and the parent selectors
+ foreach($context as $parentSel){
+ // We need to put the current selectors
+ // then join the last selector's elements on to the parents selectors
+
+ // our new selector path
+ $newSelectorPath = array();
+ // selectors from the parent after the join
+ $afterParentJoin = array();
+ $newJoinedSelectorEmpty = true;
+
+ //construct the joined selector - if & is the first thing this will be empty,
+ // if not newJoinedSelector will be the last set of elements in the selector
+ if( $sel ){
+ $newSelectorPath = $sel;
+ $lastSelector = array_pop($newSelectorPath);
+ $newJoinedSelector = $selector->createDerived( array_slice($lastSelector->elements,0) );
+ $newJoinedSelectorEmpty = false;
+ }
+ else {
+ $newJoinedSelector = $selector->createDerived(array());
+ }
+
+ //put together the parent selectors after the join
+ if ( count($parentSel) > 1) {
+ $afterParentJoin = array_merge($afterParentJoin, array_slice($parentSel,1) );
+ }
+
+ if ( $parentSel ){
+ $newJoinedSelectorEmpty = false;
+
+ // join the elements so far with the first part of the parent
+ $newJoinedSelector->elements[] = new Less_Tree_Element( $el->combinator, $parentSel[0]->elements[0]->value, $el->index, $el->currentFileInfo);
+
+ $newJoinedSelector->elements = array_merge( $newJoinedSelector->elements, array_slice($parentSel[0]->elements, 1) );
+ }
+
+ if (!$newJoinedSelectorEmpty) {
+ // now add the joined selector
+ $newSelectorPath[] = $newJoinedSelector;
+ }
+
+ // and the rest of the parent
+ $newSelectorPath = array_merge($newSelectorPath, $afterParentJoin);
+
+ // add that to our new set of selectors
+ $selectorsMultiplied[] = $newSelectorPath;
+ }
+ }
+ }
+
+ // our new selectors has been multiplied, so reset the state
+ $newSelectors = $selectorsMultiplied;
+ $currentElements = array();
+ }
+ }
+
+ // if we have any elements left over (e.g. .a& .b == .b)
+ // add them on to all the current selectors
+ if( $currentElements ){
+ $this->mergeElementsOnToSelectors($currentElements, $newSelectors);
+ }
+ foreach( $newSelectors as $new_sel){
+ if( $new_sel ){
+ $paths[] = $new_sel;
+ }
+ }
+ }
+
+ function mergeElementsOnToSelectors( $elements, &$selectors){
+
+ if( !$selectors ){
+ $selectors[] = array( new Less_Tree_Selector($elements) );
+ return;
+ }
+
+
+ foreach( $selectors as &$sel){
+
+ // if the previous thing in sel is a parent this needs to join on to it
+ if( $sel ){
+ $last = count($sel)-1;
+ $sel[$last] = $sel[$last]->createDerived( array_merge($sel[$last]->elements, $elements) );
+ }else{
+ $sel[] = new Less_Tree_Selector( $elements );
+ }
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 04:37:04 +0000