1 files changed, 105 insertions, 0 deletions
diff --git a/vendor/wikimedia/less.php/lib/Less/Visitor/extendFinder.php b/vendor/wikimedia/less.php/lib/Less/Visitor/extendFinder.php
new file mode 100644
index 0000000..8b3238d
--- /dev/null
+++ b/vendor/wikimedia/less.php/lib/Less/Visitor/extendFinder.php
@@ -0,0 +1,105 @@
+<?php
+/**
+ * @private
+ */
+class Less_Visitor_extendFinder extends Less_Visitor {
+
+	public $contexts = [];
+	public $allExtendsStack;
+	public $foundExtends;
+
+	public function __construct() {
+		$this->contexts = [];
+		$this->allExtendsStack = [ [] ];
+		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 = [];
+
+		// 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 = [];
+		$this->allExtendsStack[] =& $mediaNode->allExtends;
+	}
+
+	public function visitMediaOut() {
+		array_pop( $this->allExtendsStack );
+	}
+
+	public function visitDirective( $directiveNode ) {
+		$directiveNode->allExtends = [];
+		$this->allExtendsStack[] =& $directiveNode->allExtends;
+	}
+
+	public function visitDirectiveOut() {
+		array_pop( $this->allExtendsStack );
+	}
+}