/// <summary> /// Copies to a given node. /// </summary> /// <param name="targetNode">The node wherer to copy.</param> /// <param name="name">The node name.</param> public void CopyTo(CSharpSyntaxMatchingNode targetNode, string name) { // Data validation Ensure.That(() => name).IsNotNullOrWhiteSpace(); Ensure.That(() => targetNode).IsNotNull(); // Ensure and retrieve a node the the copy CSharpSyntaxMatchingNode newNode = targetNode.EnsureNode(name); // Add syntax node to the created node if (null != this.matchingSyntaxNodes) { // Lazy create the syntax nodes if (null == newNode.matchingSyntaxNodes) { newNode.matchingSyntaxNodes = new List<SyntaxNode>(); } // Merge syntax nodes int[] indexes = newNode.matchingSyntaxNodes.Select(x => x.Span.Start).ToArray(); newNode.matchingSyntaxNodes.AddRange(this.matchingSyntaxNodes.Where(x => !indexes.Contains(x.Span.Start))); } // Recurse for applying copy to the children if (null != this.children && this.children.Count > 0) { string[] childrenName = this.children.Keys.ToArray(); foreach (string childName in childrenName) { this.children[childName].CopyTo(newNode, childName); } } }
/// <summary> /// Extracts a snippet from a given rule pattern. /// </summary> /// <param name="memberPattern">The mem.</param> /// <returns>The extracted snippet.</returns> public override Model.Snippet Extract(string filePath, string memberPattern) { // Return the entire code if no member is specified if (string.IsNullOrWhiteSpace(memberPattern)) { return base.Extract(filePath, memberPattern); } // Parse the matching rule from the pattern CSharpMatchingRule rule = CSharpMatchingRule.Parse(memberPattern); // Load the trie for pattern matching if (null == this.syntaxTrie) { // Load file content string sourceCode = base.LoadFile(filePath); // Build a syntax tree from the source code SyntaxTree tree = CSharpSyntaxTree.ParseText(sourceCode); SyntaxNode root = tree.GetRoot(); // Visit the syntax tree for generating a Trie for pattern matching CSharpSyntaxWalkerMatchingBuilder syntaxMatchingBuilder = new CSharpSyntaxWalkerMatchingBuilder(); syntaxMatchingBuilder.Visit(root); // Retrieve the Trie root this.syntaxTrie = syntaxMatchingBuilder.Root; } // Match the rule from the syntax matching Trie CSharpSyntaxMatchingNode matchingTrie = syntaxTrie.Match(rule.MatchingChunks); if (null == matchingTrie) { throw new SnippetExtractionException("Cannot find member", string.Format("{0} {1}", filePath, memberPattern)); } // Build a snippet for extracted syntax nodes return this.BuildSnippet(matchingTrie.MatchingSyntaxNodes, rule.ExtractionMode); }