MDL-44357 theme: Allow core to compile LESS in PHP

2014-03-24 15:15:03 +08:00
parent 9b8555fbea
commit d433cf37cd
68 changed files with 10947 additions and 47 deletions
@@ -0,0 +1,168 @@
+<?php
+
+/**
+ * Selector
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Selector extends Less_Tree{
+
+	public $elements;
+	public $condition;
+	public $extendList = array();
+	public $_css;
+	public $index;
+	public $evaldCondition = false;
+	public $type = 'Selector';
+	public $currentFileInfo = array();
+	public $isReferenced;
+	public $mediaEmpty;
+
+	public $elements_len = 0;
+
+	public $_oelements;
+	public $_oelements_len;
+	public $cacheable = true;
+
+	/**
+	 * @param boolean $isReferenced
+	 */
+	public function __construct( $elements, $extendList = array() , $condition = null, $index=null, $currentFileInfo=null, $isReferenced=null ){
+
+		$this->elements = $elements;
+		$this->elements_len = count($elements);
+		$this->extendList = $extendList;
+		$this->condition = $condition;
+		if( $currentFileInfo ){
+			$this->currentFileInfo = $currentFileInfo;
+		}
+		$this->isReferenced = $isReferenced;
+		if( !$condition ){
+			$this->evaldCondition = true;
+		}
+
+		$this->CacheElements();
+	}
+
+	function accept($visitor) {
+		$this->elements = $visitor->visitArray($this->elements);
+		$this->extendList = $visitor->visitArray($this->extendList);
+		if( $this->condition ){
+			$this->condition = $visitor->visitObj($this->condition);
+		}
+
+		if( $visitor instanceof Less_Visitor_extendFinder ){
+			$this->CacheElements();
+		}
+	}
+
+	function createDerived( $elements, $extendList = null, $evaldCondition = null ){
+		$newSelector = new Less_Tree_Selector( $elements, ($extendList ? $extendList : $this->extendList), null, $this->index, $this->currentFileInfo, $this->isReferenced);
+		$newSelector->evaldCondition = $evaldCondition ? $evaldCondition : $this->evaldCondition;
+		return $newSelector;
+	}
+
+
+	public function match( $other ){
+
+		if( !$other->_oelements || ($this->elements_len < $other->_oelements_len) ){
+			return 0;
+		}
+
+		for( $i = 0; $i < $other->_oelements_len; $i++ ){
+			if( $this->elements[$i]->value !== $other->_oelements[$i]) {
+				return 0;
+			}
+		}
+
+		return $other->_oelements_len; // return number of matched elements
+	}
+
+
+	public function CacheElements(){
+
+		$this->_oelements = array();
+		$css = '';
+
+		foreach($this->elements as $v){
+
+			$css .= $v->combinator;
+			if( !$v->value_is_object ){
+				$css .= $v->value;
+				continue;
+			}
+
+			if( !property_exists($v->value,'value') || !is_string($v->value->value) ){
+				$this->cacheable = false;
+				return;
+			}
+			$css .= $v->value->value;
+		}
+
+		$this->_oelements_len = preg_match_all('/[,&#\.\w-](?:[\w-]|(?:\\\\.))*/', $css, $matches);
+		if( $this->_oelements_len ){
+			$this->_oelements = $matches[0];
+
+			if( $this->_oelements[0] === '&' ){
+				array_shift($this->_oelements);
+				$this->_oelements_len--;
+			}
+		}
+	}
+
+	public function isJustParentSelector(){
+		return !$this->mediaEmpty &&
+			count($this->elements) === 1 &&
+			$this->elements[0]->value === '&' &&
+			($this->elements[0]->combinator === ' ' || $this->elements[0]->combinator === '');
+	}
+
+	public function compile($env) {
+
+		$elements = array();
+		foreach($this->elements as $el){
+			$elements[] = $el->compile($env);
+		}
+
+		$extendList = array();
+		foreach($this->extendList as $el){
+			$extendList[] = $el->compile($el);
+		}
+
+		$evaldCondition = false;
+		if( $this->condition ){
+			$evaldCondition = $this->condition->compile($env);
+		}
+
+		return $this->createDerived( $elements, $extendList, $evaldCondition );
+	}
+
+
+	/**
+	 * @see Less_Tree::genCSS
+	 */
+	function genCSS( $output, $firstSelector = true ){
+
+		if( !$firstSelector && $this->elements[0]->combinator === "" ){
+			$output->add(' ', $this->currentFileInfo, $this->index);
+		}
+
+		foreach($this->elements as $element){
+			$element->genCSS( $output );
+		}
+	}
+
+	function markReferenced(){
+		$this->isReferenced = true;
+	}
+
+	function getIsReferenced(){
+		return !isset($this->currentFileInfo['reference']) || !$this->currentFileInfo['reference'] || $this->isReferenced;
+	}
+
+	function getIsOutput(){
+		return $this->evaldCondition;
+	}
+
+}