first commit

build/node_modules/css-tree/lib/lexer/trace.js

@@ -0,0 +1,76 @@
+function getTrace(node) {
+    function hasMatch(matchNode) {
+        if (matchNode.type === 'ASTNode') {
+            if (matchNode.node === node) {
+                result = [];
+                return true;
+            }
+
+            if (matchNode.childrenMatch) {
+                // use for-loop for better perfomance
+                for (var i = 0; i < matchNode.childrenMatch.length; i++) {
+                    if (hasMatch(matchNode.childrenMatch[i])) {
+                        return true;
+                    }
+                }
+            }
+        } else {
+            // use for-loop for better perfomance
+            for (var i = 0; i < matchNode.match.length; i++) {
+                if (hasMatch(matchNode.match[i])) {
+                    if (matchNode.syntax.type === 'Type' ||
+                        matchNode.syntax.type === 'Property' ||
+                        matchNode.syntax.type === 'Keyword') {
+                        result.unshift(matchNode.syntax);
+                    }
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    var result = null;
+
+    if (this.matched !== null) {
+        hasMatch(this.matched);
+    }
+
+    return result;
+}
+
+function testNode(match, node, fn) {
+    var trace = getTrace.call(match, node);
+
+    if (trace === null) {
+        return false;
+    }
+
+    return trace.some(fn);
+}
+
+function isType(node, type) {
+    return testNode(this, node, function(matchNode) {
+        return matchNode.type === 'Type' && matchNode.name === type;
+    });
+}
+
+function isProperty(node, property) {
+    return testNode(this, node, function(matchNode) {
+        return matchNode.type === 'Property' && matchNode.name === property;
+    });
+}
+
+function isKeyword(node) {
+    return testNode(this, node, function(matchNode) {
+        return matchNode.type === 'Keyword';
+    });
+}
+
+module.exports = {
+    getTrace: getTrace,
+    isType: isType,
+    isProperty: isProperty,
+    isKeyword: isKeyword
+};