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//
// MoveTypeToFile.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 System.IO;
using System.Linq;
using System.Threading.Tasks;
using ICSharpCode.NRefactory.CSharp;
using ICSharpCode.NRefactory6.CSharp.Refactoring;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.CodeRefactorings;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using MonoDevelop.Core;
using MonoDevelop.Ide.Editor;
using MonoDevelop.Core.Text;
using MonoDevelop.Ide;
using System.Collections.Generic;
using MonoDevelop.Ide.StandardHeader;
using ICSharpCode.NRefactory6.CSharp;
namespace MonoDevelop.CSharp.CodeFixes.MoveTypeToFile
{
[ExportCodeRefactoringProvider(LanguageNames.CSharp, Name = "Move type to file")]
class MoveTypeToFile : CodeRefactoringProvider
{
public async override Task ComputeRefactoringsAsync (CodeRefactoringContext context)
{
var document = context.Document;
var span = context.Span;
var cancellationToken = context.CancellationToken;
var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait (false);
if (model.IsFromGeneratedCode (cancellationToken))
return;
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait (false);
var token = root.FindToken(span.Start);
var type = token.Parent as BaseTypeDeclarationSyntax;
if (type == null)
return;
if (Path.GetFileNameWithoutExtension (document.FilePath) == type.Identifier.ToString ())
return;
string title;
if (IsSingleType (root)) {
title = String.Format (GettextCatalog.GetString ("Rename file to '{0}'"), Path.GetFileName (GetCorrectFileName (document, type)));
} else {
title = String.Format (GettextCatalog.GetString ("Move type to file '{0}'"), Path.GetFileName (GetCorrectFileName (document, type)));
}
context.RegisterRefactoring (new MyCodeAction (document, title, root, type));
}
class MyCodeAction : CodeAction
{
readonly Document document;
readonly BaseTypeDeclarationSyntax type;
readonly SyntaxNode root;
public MyCodeAction (Document document, string title, SyntaxNode root, BaseTypeDeclarationSyntax type)
{
this.root = root;
this.title = title;
this.type = type;
this.document = document;
}
string title;
public override string Title {
get {
return this.title;
}
}
protected override Task<Document> GetChangedDocumentAsync (System.Threading.CancellationToken cancellationToken)
{
var correctFileName = GetCorrectFileName (document, type);
if (IsSingleType (root)) {
FileService.RenameFile (document.FilePath, correctFileName);
var doc = IdeApp.Workbench.ActiveDocument;
if (doc.HasProject) {
IdeApp.ProjectOperations.Save (doc.Project);
}
return Task.FromResult (document);
}
return Task.FromResult (CreateNewFile (type, correctFileName));
}
Document CreateNewFile (BaseTypeDeclarationSyntax type, string correctFileName)
{
var doc = IdeApp.Workbench.ActiveDocument;
var content = doc.Editor.Text;
var types = new List<BaseTypeDeclarationSyntax> (
root
.DescendantNodesAndSelf (n => !(n is BaseTypeDeclarationSyntax))
.OfType<BaseTypeDeclarationSyntax> ()
.Where (t => t.SpanStart != type.SpanStart)
);
types.Sort ((x, y) => y.SpanStart.CompareTo (x.SpanStart));
foreach (var removeType in types) {
var bounds = CalcTypeBounds (removeType);
content = content.Remove (bounds.Offset, bounds.Length);
}
if (doc.HasProject) {
string header = StandardHeaderService.GetHeader (doc.Project, correctFileName, true);
if (!string.IsNullOrEmpty (header))
content = header + doc.Editor.GetEolMarker () + StripHeader (content);
}
content = StripDoubleBlankLines (content);
File.WriteAllText (correctFileName, content);
if (doc.HasProject) {
doc.Project.AddFile (correctFileName);
IdeApp.ProjectOperations.Save (doc.Project);
}
doc.Editor.RemoveText (CalcTypeBounds (type));
return document;
}
ISegment CalcTypeBounds (BaseTypeDeclarationSyntax type)
{
int start = type.Span.Start;
int end = type.Span.End;
foreach (var trivia in type.GetLeadingTrivia ()) {
if (trivia.Kind () == SyntaxKind.SingleLineDocumentationCommentTrivia) {
start = trivia.FullSpan.Start;
}
}
return TextSegment.FromBounds (start, end);
}
}
static bool IsBlankLine (IReadonlyTextDocument doc, int i)
{
var line = doc.GetLine (i);
return line.Length == line.GetIndentation (doc).Length;
}
static string StripDoubleBlankLines (string content)
{
var doc = TextEditorFactory.CreateNewDocument (new StringTextSource (content), "a.cs");
for (int i = 1; i + 1 <= doc.LineCount; i++) {
if (IsBlankLine (doc, i) && IsBlankLine (doc, i + 1)) {
doc.RemoveText (doc.GetLine (i).SegmentIncludingDelimiter);
i--;
continue;
}
}
return doc.Text;
}
static string StripHeader (string content)
{
var doc = TextEditorFactory.CreateNewDocument (new StringTextSource (content), "");
while (true) {
string lineText = doc.GetLineText (1);
if (lineText == null)
break;
if (lineText.StartsWith ("//", StringComparison.Ordinal)) {
doc.RemoveText (doc.GetLine (1).SegmentIncludingDelimiter);
continue;
}
break;
}
return doc.Text;
}
static bool IsSingleType (SyntaxNode root)
{
return root.DescendantNodesAndSelf (c => !(c is BaseTypeDeclarationSyntax)).OfType<BaseTypeDeclarationSyntax> ().Count () == 1;
}
internal static string GetCorrectFileName (Document document, BaseTypeDeclarationSyntax type)
{
if (type == null)
return document.FilePath;
return Path.Combine (Path.GetDirectoryName (document.FilePath), type.Identifier + Path.GetExtension (document.FilePath));
}
}
}
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