1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/wikimedia/less.php/lib/Less/Visitor/joinSelector.php b/vendor/wikimedia/less.php/lib/Less/Visitor/joinSelector.php
new file mode 100644
index 0000000..a106830
--- /dev/null
+++ b/vendor/wikimedia/less.php/lib/Less/Visitor/joinSelector.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * @private
+ */
+class Less_Visitor_joinSelector extends Less_Visitor {
+
+	public $contexts = [ [] ];
+
+	/**
+	 * @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 ) {
+		$context = end( $this->contexts );
+		$paths = [];
+
+		if ( !$rulesetNode->root ) {
+			$selectors = $rulesetNode->selectors;
+			if ( $selectors !== null ) {
+				$filtered = [];
+				foreach ( $selectors as $selector ) {
+					if ( $selector->getIsOutput() ) {
+						$filtered[] = $selector;
+					}
+				}
+				$selectors = $rulesetNode->selectors = $filtered ?: null;
+				if ( $selectors ) {
+					$paths = $rulesetNode->joinSelectors( $context, $selectors );
+				}
+			}
+
+			if ( $selectors === null ) {
+				$rulesetNode->rules = null;
+			}
+
+			$rulesetNode->paths = $paths;
+		}
+
+		// NOTE: Assigned here instead of at the start like less.js,
+		// because PHP arrays aren't by-ref
+		$this->contexts[] = $paths;
+	}
+
+	public function visitRulesetOut() {
+		array_pop( $this->contexts );
+	}
+
+	public function visitMedia( $mediaNode ) {
+		$context = end( $this->contexts );
+
+		if ( count( $context ) === 0 || ( is_object( $context[0] ) && $context[0]->multiMedia ) ) {
+			$mediaNode->rules[0]->root = true;
+		}
+	}
+
+}