// // FormatStringHelper.cs // // Author: // Simon Lindgren // // Copyright (c) 2012 Simon Lindgren // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. using System; using System.Collections.Generic; using ICSharpCode.NRefactory.CSharp.Resolver; using System.Linq; using ICSharpCode.NRefactory.TypeSystem; namespace ICSharpCode.NRefactory.CSharp { static class FormatStringHelper { static readonly string[] parameterNames = { "format", "frmt", "fmt" }; public static bool TryGetFormattingParameters(CSharpInvocationResolveResult invocationResolveResult, InvocationExpression invocationExpression, out Expression formatArgument, out IList arguments, Func argumentFilter) { if (argumentFilter == null) argumentFilter = (p, e) => true; formatArgument = null; arguments = new List(); // Serach for method of type: void Name(string format, params object[] args); if (invocationResolveResult.Member.SymbolKind == SymbolKind.Method) { var methods = invocationResolveResult.Member.DeclaringType.GetMethods(m => m.Name == invocationResolveResult.Member.Name).ToList(); if (!methods.Any(m => m.Parameters.Count == 2 && m.Parameters[0].Type.IsKnownType(KnownTypeCode.String) && parameterNames.Contains(m.Parameters[0].Name) && m.Parameters[1].IsParams)) return false; } var argumentToParameterMap = invocationResolveResult.GetArgumentToParameterMap(); var resolvedParameters = invocationResolveResult.Member.Parameters; var allArguments = invocationExpression.Arguments.ToArray(); for (int i = 0; i < allArguments.Length; i++) { var parameterIndex = argumentToParameterMap[i]; if (parameterIndex < 0 || parameterIndex >= resolvedParameters.Count) { // No valid mapping for this argument, skip it continue; } var parameter = resolvedParameters[parameterIndex]; var argument = allArguments[i]; if (i == 0 && parameter.Type.IsKnownType(KnownTypeCode.String) && parameterNames.Contains(parameter.Name)) { formatArgument = argument; } else if (formatArgument != null && parameter.IsParams && !invocationResolveResult.IsExpandedForm) { var ace = argument as ArrayCreateExpression; if (ace == null || ace.Initializer.IsNull) return false; foreach (var element in ace.Initializer.Elements) { if (argumentFilter(parameter, element)) arguments.Add(argument); } } else if (formatArgument != null && argumentFilter(parameter, argument)) { arguments.Add(argument); } } return formatArgument != null; } } }