Initial end to end working completion with tests

README.md

@@ -1,2 +1,12 @@
-# codeanalysis
+# Xamarin CodeAnalyis
+
 Analyzers, code fixers and custom completion for Xamarin projects
+
+## Building
+
+Just open Xamarin.CodeAnalysis.sln and build.
+
+> NOTE: the *first* build ever needs to be run from an administrator command prompt, 
+> because the extension provides MSBuild targets that need to be symlinked from the 
+> `Exp` hive location to the `VsInstallDir\MSBuild` location, which requires elevation.
+

Xamarin.CodeAnalysis.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
+# Visual Studio Version 16
-VisualStudioVersion = 15.0.28218.60
+VisualStudioVersion = 16.0.28223.52
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Xamarin.CodeAnalysis", "src\Xamarin.CodeAnalysis\Xamarin.CodeAnalysis.csproj", "{A83DFC4B-4270-4A1A-8438-897A8AA61AE0}"
 EndProject
@@ -19,6 +19,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		src\GitInfo.txt = src\GitInfo.txt
 		src\NuGet.Config = src\NuGet.Config
 		Packages.props = Packages.props
+		README.md = README.md
 	EndProjectSection
 EndProject
 Global

src/Directory.Build.props

@@ -13,8 +13,9 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <GitSkipCache Condition="'$(CI)' == 'true'">true</GitSkipCache>
+    <GitSkipCache Condition="$(CI)">true</GitSkipCache>
-    <Configuration Condition="'$(Configuration)' == '' and '$(CI)' == 'true'">Release</Configuration>
+    <Configuration Condition="'$(Configuration)' == '' and $(CI)">Release</Configuration>
+    <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
   </PropertyGroup>
 
   <!-- Redeclared by GitInfo -->

src/Xamarin.CodeAnalysis.Completion/Extensions.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Text;
+
+namespace Xamarin.CodeAnalysis
+{
+    internal static class Extensions
+    {
+        //public static async Task<SemanticModel> GetSemanticModelForSpanAsync(this Document document, TextSpan span, CancellationToken cancellationToken)
+        //{
+        //    var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
+        //    var token = root.FindToken(span.Start);
+        //    if (token.Parent == null)
+        //    {
+        //        return await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
+        //    }
+        //}
+    }
+}

src/Xamarin.CodeAnalysis.Completion/ResourceCompletionProvider.cs

@@ -0,0 +1,129 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Xml;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Completion;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Options;
+using Microsoft.CodeAnalysis.Tags;
+using Microsoft.CodeAnalysis.Text;
+
+namespace Xamarin.CodeAnalysis
+{
+    [ExportCompletionProvider(nameof(ResourceCompletionProvider), LanguageNames.CSharp)]
+    public class ResourceCompletionProvider : CompletionProvider
+    {
+        private static readonly CompletionItemRules StandardCompletionRules = CompletionItemRules.Default.WithSelectionBehavior(CompletionItemSelectionBehavior.SoftSelection);
+
+        public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
+        {
+            // TODO: should trigger if we're inside a string
+            return base.ShouldTriggerCompletion(text, caretPosition, trigger, options);
+        }
+
+        public override Task<CompletionDescription> GetDescriptionAsync(Document document, CompletionItem item, CancellationToken cancellationToken)
+        {
+            // TODO: get the actual xml file location.
+            return Task.FromResult(CompletionDescription.FromText($"{item.Properties["Path"]}({item.Properties["Line"]},{item.Properties["Position"]})"));
+        }
+
+        public override Task<CompletionChange> GetChangeAsync(Document document, CompletionItem item, char? commitKey, CancellationToken cancellationToken)
+        {
+            // Determine change to insert
+            return base.GetChangeAsync(document, item, commitKey, cancellationToken);
+        }
+
+        static readonly Regex isResourceValue = new Regex(@"Resources\\values\\.*.xml", RegexOptions.Compiled);
+
+        public override async Task ProvideCompletionsAsync(CompletionContext completionContext)
+        {
+            if (!completionContext.Document.SupportsSemanticModel)
+                return;
+
+            var position = completionContext.Position;
+            var document = completionContext.Document;
+            var cancellationToken = completionContext.CancellationToken;
+
+            var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
+            var span = completionContext.CompletionListSpan;
+            var token = root.FindToken(span.Start);
+            var node = token.Parent?.AncestorsAndSelf().FirstOrDefault(a => a.FullSpan.Contains(span));
+            if (node is LiteralExpressionSyntax literal &&
+                node?.Parent is AttributeArgumentSyntax argument && 
+                node?.Parent?.Parent?.Parent is AttributeSyntax attribute)
+            {
+                var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
+                var symbol = semanticModel.GetSymbolInfo(attribute, cancellationToken).Symbol;
+                if (symbol?.ContainingType.ToDisplayString() == "Android.App.ActivityAttribute" || 
+                    (symbol == null && attribute.Name.ToString() == "Activity"))
+                {
+                    var name = argument.NameEquals.Name.ToString();
+                    // TODO: consider resource files some other way?
+                    var valueDocs = document.Project.AdditionalDocuments.Where(doc => isResourceValue.IsMatch(doc.FilePath));
+                    var elementName = "string";
+                    if (name == "Theme")
+                        elementName = "style";
+
+                    var strings = new HashSet<string>();
+                    var styles = new HashSet<string>();
+                    var xmlSettings = new XmlReaderSettings
+                    {
+                        IgnoreComments = true,
+                        IgnoreProcessingInstructions = true,
+                        IgnoreWhitespace = true,
+                    };
+
+                    foreach (var doc in valueDocs)
+                    {
+                        XmlReader reader = null;
+                        try
+                        {
+                            if (File.Exists(doc.FilePath))
+                            {
+                                reader = XmlReader.Create(doc.FilePath, xmlSettings);
+                            }
+                            else
+                            {
+                                // In tests, the file doesn't exist.
+                                var writer = new StringWriter();
+                                (await doc.GetTextAsync(cancellationToken)).Write(writer, cancellationToken);
+                                reader = XmlReader.Create(new StringReader(writer.ToString()), xmlSettings);
+                            }
+
+                            if (reader.MoveToContent() == XmlNodeType.Element)
+                            {
+                                // TODO: cache already parsed results as long as the text version remains the same?
+                                while (reader.Read())
+                                {
+                                    if (reader.LocalName == elementName && reader.GetAttribute("name") is string id)
+                                    {
+                                        completionContext.AddItem(CompletionItem.Create($"@{reader.LocalName}/{id}",
+                                            tags: ImmutableArray.Create(WellKnownTags.Constant, "Xamarin"),
+                                            properties: ImmutableDictionary.Create<string, string>()
+                                                .Add("Path", doc.FilePath)
+                                                .Add("Line", ((IXmlLineInfo)reader).LineNumber.ToString())
+                                                .Add("Position", ((IXmlLineInfo)reader).LinePosition.ToString()),
+                                            rules: StandardCompletionRules));
+                                    }
+                                }
+                            }
+                        }
+                        finally
+                        {
+                            reader?.Dispose();
+                        }
+                    }
+                }
+            }
+
+            await Task.CompletedTask;
+        }
+    }
+}

src/Xamarin.CodeAnalysis.Completion/StringCompletionProvider.cs

@@ -1,46 +0,0 @@
-using System.Collections.Immutable;
-using System.Threading;
-using System.Threading.Tasks;
-using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.Completion;
-using Microsoft.CodeAnalysis.Options;
-using Microsoft.CodeAnalysis.Tags;
-using Microsoft.CodeAnalysis.Text;
-
-namespace Xamarin.CodeAnalysis
-{
-    [ExportCompletionProvider(nameof(StringCompletionProvider), LanguageNames.CSharp)]
-    public class StringCompletionProvider : CompletionProvider
-    {
-        private static readonly CompletionItemRules StandardCompletionRules = CompletionItemRules.Default.WithSelectionBehavior(CompletionItemSelectionBehavior.SoftSelection);
-
-        public override bool ShouldTriggerCompletion(SourceText text, int caretPosition, CompletionTrigger trigger, OptionSet options)
-        {
-            // TODO: should trigger if we're inside a string
-            return base.ShouldTriggerCompletion(text, caretPosition, trigger, options);
-        }
-
-        public override Task<CompletionDescription> GetDescriptionAsync(Document document, CompletionItem item, CancellationToken cancellationToken)
-        {
-            // TODO: get the actual xml file location.
-            return Task.FromResult(CompletionDescription.FromText("strings.xml(120,34)"));
-        }
-
-        public override Task<CompletionChange> GetChangeAsync(Document document, CompletionItem item, char? commitKey, CancellationToken cancellationToken)
-        {
-            // Determine change to insert
-            return base.GetChangeAsync(document, item, commitKey, cancellationToken);
-        }
-
-        public override async Task ProvideCompletionsAsync(CompletionContext context)
-        {
-            context.AddItem(CompletionItem.Create("@style/MainTheme",
-                tags: ImmutableArray.Create(WellKnownTags.Constant),
-                // TODO: props should contain the file location it was retrieved from to use in description
-                // properties: ImmutableDictionary.CreateBuilder<string, string>().Add(,
-                rules: StandardCompletionRules));
-
-            await Task.CompletedTask;
-        }
-    }
-}

src/Xamarin.CodeAnalysis.Extension/Xamarin.CodeAnalysis.Android.targets

@@ -0,0 +1,7 @@
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+  <ItemGroup>
+    <AdditionalFiles Include="@(AndroidResource -> WithMetadataValue('RelativeDir', 'Resources\values\'))" />
+  </ItemGroup>
+  
+</Project>

src/Xamarin.CodeAnalysis.Extension/Xamarin.CodeAnalysis.Extension.csproj

@@ -20,12 +20,15 @@
     <IsExperimental>true</IsExperimental>
     <IsSystemComponent>false</IsSystemComponent>
 
+    <!--<CreateVsixContainer>true</CreateVsixContainer>-->
     <VsixVersion>42.42.42</VsixVersion>
+    <DefaultItemExcludes>*.targets</DefaultItemExcludes>
 
     <RestoreSources>$(RestoreSources);https://api.nuget.org/v3/index.json;https://nugets.blob.core.windows.net/xvssdk/index.json</RestoreSources>
   </PropertyGroup>
-
+  
-  <PropertyGroup Condition="'$(CI)' == 'true'">
+  
+  <PropertyGroup Condition="$(CI)">
     <IsProductComponent>true</IsProductComponent>
     <IsExperimental>false</IsExperimental>
     <IsSystemComponent>true</IsSystemComponent>
@@ -59,9 +62,16 @@
     <Resource Include="Properties\ICN_Xamarin.ico" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Content Include="*.targets" IncludeInVSIX="true" VSIXSubPath="Xamarin" SymLink="true" />
+    <Content Update="Xamarin.CodeAnalysis.ImportAfter.targets" VSIXSubPath="Current\Microsoft.Common.Targets\ImportAfter" />
+    <Content Update="@(Content)" Condition="$(CI)" InstallRoot="MSBuild" />
+    <UpToDateCheckInput Include="@(Content)" />
+  </ItemGroup>
+
   <Target Name="GetVsixVersion" DependsOnTargets="SetVersions" Returns="$(VsixVersion)">
     <PropertyGroup>
-      <VsixVersion Condition="'$(CI)' == 'true'">$(GitSemVerMajor).$(GitSemVerMinor).$(GitSemVerPatch)</VsixVersion>
+      <VsixVersion Condition="$(CI)">$(GitSemVerMajor).$(GitSemVerMinor).$(GitSemVerPatch)</VsixVersion>
     </PropertyGroup>
   </Target>
 
@@ -83,4 +93,71 @@
   <Target Name="IsExperimental" Returns="$(IsExperimental)" />
   <Target Name="IsSystemComponent" Returns="$(IsSystemComponent)" />
 
+  <PropertyGroup Condition="'$(OS)' == 'Windows_NT'">
+    <BuildDependsOn Condition="!$(CI)">
+      $(BuildDependsOn);
+      SymLink
+    </BuildDependsOn>
+  </PropertyGroup>
+
+  <Target Name="SymLink" DependsOnTargets="IsAdministrator;CollectLinkItems;ReplaceLinkItems" />
+  
+  <Target Name="IsAdministrator">
+    <IsAdministrator>
+      <Output TaskParameter="Result" PropertyName="IsAdministrator" />
+    </IsAdministrator>
+    <Warning Text="Current user isn't an Administrator, so MSBuild artifacts won't be symlinked." Condition="'$(IsAdministrator)' == 'false'" />
+  </Target>
+  
+  <ItemDefinitionGroup>
+    <MkLinkCandidate>
+      <Exists>false</Exists>
+      <IsSymLink>false</IsSymLink>
+    </MkLinkCandidate>
+    <VSIXSourceItem>
+      <VSIXSubPath />
+      <SymLink />
+    </VSIXSourceItem>
+  </ItemDefinitionGroup>
+    
+  <Target Name="CollectLinkItems" DependsOnTargets="IsAdministrator;GetVsixDeploymentPath;GetVsixSourceItems" Condition="'$(IsAdministrator)' == 'true'">
+    <ItemGroup>
+      <MkLinkCandidate Include="@(VSIXSourceItem -> '$(MSBuildExtensionsPath)\%(VSIXSubPath)\%(Filename)%(Extension)')" Condition="'%(SymLink)' == 'true'">
+        <LinkTarget>$(VsixDeploymentPath)\%(VSIXSubPath)\%(Filename)%(Extension)</LinkTarget>
+      </MkLinkCandidate>
+      <MkLinkCandidate Condition="Exists('%(FullPath)')">
+        <IsSymLink Condition="$([MSBuild]::BitwiseAnd(1024, $([System.IO.File]::GetAttributes('%(FullPath)')))) == '1024'">true</IsSymLink>
+        <Exists>true</Exists>
+      </MkLinkCandidate>
+      <MkLinkSource Include="@(MkLinkCandidate)" Condition="!Exists('%(FullPath)') Or '%(IsSymLink)' == 'false'" />
+    </ItemGroup>
+  </Target>
+
+  <Target Name="ReplaceLinkItems" Condition="'@(MkLinkSource)' != '' And '$(IsAdministrator)' == 'true'">
+    <Message Text="In $(Configuration) builds, we attempt to symlink MSBuild files with current project output." Importance="high" />
+    <ItemGroup>
+      <_FilesToDelete Include="@(MkLinkSource -&gt; WithMetadataValue('Exists', 'true'))" />
+    </ItemGroup>
+    <Exec Command='del "%(_FilesToDelete.FullPath)"' EchoOff="true" Condition="'@(_FilesToDelete)' != ''" />
+    <Exec Command='mklink "%(MkLinkSource.Identity)" "%(MkLinkSource.LinkTarget)"' 
+          ConsoleToMSBuild="true" 
+          EchoOff="true" 
+      Condition="Exists('%(MkLinkSource.RootDir)%(MkLinkSource.Directory)')">
+      <Output TaskParameter="ConsoleOutput" ItemName="MkLinked" />
+    </Exec>
+    <Message Importance="high" Text="%(MkLinked.Identity)" Condition="'@(MkLinked)' != ''" />
+  </Target>
+  
+  <UsingTask TaskName="IsAdministrator" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
+    <ParameterGroup>
+      <Result ParameterType="System.Boolean" Output="true" />
+    </ParameterGroup>
+    <Task>
+      <Using Namespace="System.Security.Principal" />
+      <Code Type="Fragment" Language="cs">
+        Result = new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator);
+      </Code>
+    </Task>
+  </UsingTask>
+
 </Project>

src/Xamarin.CodeAnalysis.Extension/Xamarin.CodeAnalysis.ImportAfter.targets

@@ -0,0 +1,9 @@
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+
+    <XamarinCodeAnalysisTargets Condition="'$(XamarinCodeAnalysisTargets)' == ''">$(MSBuildExtensionsPath)\Xamarin\Xamarin.CodeAnalysis.targets</XamarinCodeAnalysisTargets>
+  </PropertyGroup>
+
+  <Import Condition="Exists('$(XamarinCodeAnalysisTargets)')" Project="$(XamarinCodeAnalysisTargets)" />
+</Project>

src/Xamarin.CodeAnalysis.Extension/Xamarin.CodeAnalysis.targets

@@ -0,0 +1,5 @@
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+  <Import Project="Xamarin.CodeAnalysis.Android.targets" Condition="'$(TargetFrameworkIdentifier)' == 'MonoAndroid'" />
+
+</Project>

src/Xamarin.CodeAnalysis.Tests/CompletionTests.cs

@@ -1,6 +1,4 @@
-
+using System.Linq;
-using System;
-using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Completion;
@@ -13,21 +11,24 @@ namespace Xamarin.CodeAnalysis.Tests
     public class CompletionTests
     {
         [Theory]
-        [InlineData(@"using System;
+        [InlineData(@"using Android.App;
-public class Foo 
+using Android.Support.Design.Widget;
+using Android.Support.V7.App;
+using Android.Views;
+
+[Activity(Label = ""`"", MainLauncher = true)]
+public class MainActivity : AppCompatActivity, NavigationView.IOnNavigationItemSelectedListener
 {
-    public void Do() 
+    public bool OnNavigationItemSelected(IMenuItem menuItem) => true;
-    {
+}
-        Console.WriteLine(""`"");
+", "@string/app_name")]
-    }
+        public async Task can_retrieve_completion(string code, string completion)
-}")]
-        public async Task can_retrieve_completion(string code)
         {
             var hostServices = MefHostServices.Create(MefHostServices.DefaultAssemblies.Concat(
                 new[]
                 {
                     typeof(CompletionService).Assembly,
-                    typeof(StringCompletionProvider).Assembly,
+                    typeof(ResourceCompletionProvider).Assembly,
                 }));
 
             var workspace = new AdhocWorkspace(hostServices);
@@ -40,7 +41,17 @@ public class Foo
                    MetadataReference.CreateFromFile("Xamarin.CodeAnalysis.dll"),
                    MetadataReference.CreateFromFile("Xamarin.CodeAnalysis.Completion.dll"),
                })
-               .AddDocument("TestDocument.cs", code);
+               .AddAdditionalDocument("strings.xml", @"<?xml version='1.0' encoding='utf-8'?>
+<resources>
+    <string name='app_name'>TestApp</string>
+</resources>", new[] { "Resources\\values" }, "Resources\\values\\strings.xml")
+               .Project
+               .AddAdditionalDocument("styles.xml", @"<?xml version='1.0' encoding='utf-8'?>
+<resources>
+    <style name='AppTheme' parent='Theme.AppCompat.Light.DarkActionBar' />
+</resources>", new[] { "Resources\\values" }, "Resources\\values\\styles.xml")
+               .Project
+               .AddDocument("TestDocument.cs", code.Replace("`", ""));
 
             var service = CompletionService.GetService(document);
             Assert.NotNull(service);
@@ -51,7 +62,50 @@ public class Foo
             var completions = await service.GetCompletionsAsync(document, caret);
 
             Assert.NotNull(completions);
-            Assert.NotEmpty(completions.Items);
+            Assert.Contains(completions.Items, x => x.Tags.Contains("Xamarin"));
+            Assert.Contains(completions.Items, x => x.DisplayText == completion);
+        }
+
+        [Theory]
+        [InlineData(@"using System;
+public class Foo 
+{
+    public void Do() 
+    {
+        Console.`WriteLine("""");
+    }
+}")]
+        public async Task does_not_trigger_completion(string code)
+        {
+            var hostServices = MefHostServices.Create(MefHostServices.DefaultAssemblies.Concat(
+                new[]
+                {
+                    typeof(CompletionService).Assembly,
+                    typeof(ResourceCompletionProvider).Assembly,
+                }));
+
+            var workspace = new AdhocWorkspace(hostServices);
+            var document = workspace
+               .AddProject("TestProject", LanguageNames.CSharp)
+               .WithCompilationOptions(new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary))
+               .WithMetadataReferences(new MetadataReference[]
+               {
+                   MetadataReference.CreateFromFile(ThisAssembly.Metadata.NETStandardReference),
+                   MetadataReference.CreateFromFile("Xamarin.CodeAnalysis.dll"),
+                   MetadataReference.CreateFromFile("Xamarin.CodeAnalysis.Completion.dll"),
+               })
+               .AddDocument("TestDocument.cs", code.Replace("`", ""));
+
+            var service = CompletionService.GetService(document);
+            Assert.NotNull(service);
+
+            var caret = code.IndexOf('`');
+            Assert.NotEqual(-1, caret);
+
+            var completions = await service.GetCompletionsAsync(document, caret);
+
+            Assert.NotNull(completions);
+            Assert.DoesNotContain(completions.Items, x => x.Tags.Contains("Xamarin"));
         }
     }
 }

src/Xamarin.CodeAnalysis.Tests/Xamarin.CodeAnalysis.Tests.csproj

@@ -3,6 +3,7 @@
 
   <PropertyGroup>
     <TargetFramework>net46</TargetFramework>
+    <TargetFramework Condition="'$(VisualStudioVersion)' == '16.0'">net472</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>