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//
// CodeActionService.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2014 Xamarin Inc. (http://xamarin.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 Microsoft.CodeAnalysis.CodeRefactorings;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Threading;
using Microsoft.CodeAnalysis.Text;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeActions;
using MonoDevelop.Core;
using MonoDevelop.Ide.Editor;
using MonoDevelop.CodeIssues;
using Mono.Addins;
using ICSharpCode.NRefactory6.CSharp.Refactoring;
using MonoDevelop.Core.Text;
using System.Linq;
namespace MonoDevelop.CodeActions
{
static class CodeRefactoringService
{
readonly static List<CodeDiagnosticProvider> providers = new List<CodeDiagnosticProvider> ();
static CodeRefactoringService ()
{
providers.Add (new BuiltInCodeDiagnosticProvider ());
AddinManager.AddExtensionNodeHandler ("/MonoDevelop/Refactoring/CodeDiagnosticProvider", delegate(object sender, ExtensionNodeEventArgs args) {
var node = (TypeExtensionNode)args.ExtensionNode;
switch (args.Change) {
case ExtensionChange.Add:
providers.Add ((CodeDiagnosticProvider)node.CreateInstance ());
break;
}
});
}
public async static Task<IEnumerable<CodeDiagnosticDescriptor>> GetCodeDiagnosticsAsync (DocumentContext documentContext, string language, CancellationToken cancellationToken = default (CancellationToken))
{
var result = new List<CodeDiagnosticDescriptor> ();
foreach (var provider in providers) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<CodeDiagnosticDescriptor> ();
result.AddRange (await provider.GetCodeDiagnosticDescriptorsAsync (documentContext, language, cancellationToken).ConfigureAwait (false));
}
return result;
}
public async static Task<IEnumerable<CodeDiagnosticFixDescriptor>> GetCodeFixesAsync (DocumentContext documentContext, string language, CancellationToken cancellationToken = default (CancellationToken))
{
var result = new List<CodeDiagnosticFixDescriptor> ();
foreach (var provider in providers) {
result.AddRange (await provider.GetCodeFixDescriptorsAsync (documentContext, language, cancellationToken).ConfigureAwait (false));
}
return result;
}
public async static Task<IEnumerable<CodeRefactoringDescriptor>> GetCodeRefactoringsAsync (DocumentContext documentContext, string language, CancellationToken cancellationToken = default (CancellationToken))
{
var result = new List<CodeRefactoringDescriptor> ();
foreach (var provider in providers) {
result.AddRange (await provider.GetCodeRefactoringDescriptorsAsync (documentContext, language, cancellationToken).ConfigureAwait (false));
}
return result;
}
public static async Task<IEnumerable<ValidCodeAction>> GetValidActionsAsync (TextEditor editor, DocumentContext doc, TextSpan span, CancellationToken cancellationToken = default (CancellationToken))
{
if (editor == null)
throw new ArgumentNullException ("editor");
if (doc == null)
throw new ArgumentNullException ("doc");
var parsedDocument = doc.ParsedDocument;
var actions = new List<ValidCodeAction> ();
if (parsedDocument == null)
return actions;
var model = parsedDocument.GetAst<SemanticModel> ();
if (model == null)
return actions;
var root = await model.SyntaxTree.GetRootAsync(cancellationToken).ConfigureAwait (false);
if (span.End > root.Span.End)
return actions;
TextSpan tokenSegment = span;
var token = root.FindToken (span.Start);
if (!token.IsMissing)
tokenSegment = token.Span;
try {
foreach (var descriptor in await GetCodeRefactoringsAsync (doc, MimeTypeToLanguage(editor.MimeType), cancellationToken).ConfigureAwait (false)) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<ValidCodeAction> ();
try {
await descriptor.GetProvider ().ComputeRefactoringsAsync (
new CodeRefactoringContext (doc.AnalysisDocument, span, delegate (CodeAction ca) {
var nrca = ca as NRefactoryCodeAction;
var validSegment = tokenSegment;
if (nrca != null)
validSegment = nrca.TextSpan;
actions.Add (new ValidCodeAction (ca, validSegment));
}, cancellationToken)
).ConfigureAwait (false);
} catch (OperationCanceledException) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<ValidCodeAction> ();
} catch (AggregateException) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<ValidCodeAction> ();
} catch (Exception e) {
LoggingService.LogError ("Error while getting refactorings from " + descriptor.IdString, e);
continue;
}
}
} catch (OperationCanceledException) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<ValidCodeAction> ();
} catch (AggregateException) {
if (cancellationToken.IsCancellationRequested)
return Enumerable.Empty<ValidCodeAction> ();
}
return actions;
}
public static string MimeTypeToLanguage (string mimeType)
{
switch (mimeType) {
case "text/x-csharp":
return LanguageNames.CSharp;
}
return null;
}
}
}
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