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//
// IntroduceFormatItem.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2011 Novell, Inc (http://www.novell.com)
//
// 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 ICSharpCode.NRefactory.PatternMatching;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
/// <summary>
/// Introduce format item. Works on strings that contain selections.
/// "this is <some> string" => string.Format ("this is {0} string", <some>)
/// </summary>
[ContextAction("Introduce format item", Description = "Creates a string.format call with the selection as parameter.")]
public class IntroduceFormatItemAction : ICodeActionProvider
{
readonly static MemberReferenceExpression PrototypeFormatReference = new MemberReferenceExpression (new TypeReferenceExpression (new PrimitiveType ("string")), "Format");
public IEnumerable<CodeAction> GetActions(RefactoringContext context)
{
if (!context.IsSomethingSelected) {
yield break;
}
var pexpr = context.GetNode<PrimitiveExpression>();
if (pexpr == null || !(pexpr.Value is string)) {
yield break;
}
if (pexpr.LiteralValue.StartsWith("@", StringComparison.Ordinal)) {
if (!(pexpr.StartLocation < new TextLocation(context.Location.Line, context.Location.Column - 1) && new TextLocation(context.Location.Line, context.Location.Column + 1) < pexpr.EndLocation)) {
yield break;
}
} else {
if (!(pexpr.StartLocation < context.Location && context.Location < pexpr.EndLocation)) {
yield break;
}
}
yield return new CodeAction (context.TranslateString("Introduce format item"), script => {
var invocation = context.GetNode<InvocationExpression>();
if (invocation != null && invocation.Target.IsMatch(PrototypeFormatReference)) {
AddFormatCallToInvocation(context, script, pexpr, invocation);
return;
}
var arg = CreateFormatArgument(context);
var newInvocation = new InvocationExpression (PrototypeFormatReference.Clone()) {
Arguments = { CreateFormatString(context, pexpr, 0), arg }
};
script.Replace(pexpr, newInvocation);
script.Select(arg);
}, pexpr);
}
void AddFormatCallToInvocation (RefactoringContext context, Script script, PrimitiveExpression pExpr, InvocationExpression invocation)
{
var newInvocation = (InvocationExpression)invocation.Clone ();
newInvocation.Arguments.First ().ReplaceWith (CreateFormatString (context, pExpr, newInvocation.Arguments.Count () - 1));
newInvocation.Arguments.Add (CreateFormatArgument (context));
script.Replace (invocation, newInvocation);
}
static PrimitiveExpression CreateFormatArgument (RefactoringContext context)
{
return new PrimitiveExpression (context.SelectedText);
}
static PrimitiveExpression CreateFormatString(RefactoringContext context, PrimitiveExpression pExpr, int argumentNumber)
{
var start = context.GetOffset(pExpr.StartLocation);
var end = context.GetOffset(pExpr.EndLocation);
var sStart = context.GetOffset(context.SelectionStart);
var sEnd = context.GetOffset(context.SelectionEnd);
return new PrimitiveExpression("", context.GetText(start, sStart - start) + "{" + argumentNumber + "}" + context.GetText(sEnd, end - sEnd));
}
}
}
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