Add Component source generator project

CI/CI.Windows.proj

@@ -35,6 +35,7 @@
     <ProjectToBuild Include="..\src\Microsoft.MobileBlazorBindings.ProtectedStorage\Microsoft.MobileBlazorBindings.ProtectedStorage.csproj" />
     <ProjectToBuild Include="..\src\Microsoft.MobileBlazorBindings.Authentication\Microsoft.MobileBlazorBindings.Authentication.csproj" />
     <ProjectToBuild Include="..\src\Microsoft.MobileBlazorBindings.Authentication.Msal\Microsoft.MobileBlazorBindings.Authentication.Msal.csproj" />
+    <ProjectToBuild Include="..\src\Microsoft.MobileBlazorBindings.ComponentGenerator\Microsoft.MobileBlazorBindings.ComponentGenerator.csproj" />
     <ProjectToBuild Include="..\src\ComponentWrapperGenerator\ComponentWrapperGenerator.csproj" />
   </ItemGroup>
 </Project>

MobileBlazorBindings.sln

@@ -188,6 +188,10 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WinFormsBlazorSample", "sam
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.MobileBlazorBindings.WindowsForms", "src\Microsoft.MobileBlazorBindings.WindowsForms\Microsoft.MobileBlazorBindings.WindowsForms.csproj", "{1D22DA82-38EB-410C-88EA-37D3D786CCC5}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.MobileBlazorBindings.ComponentGenerator", "src\Microsoft.MobileBlazorBindings.ComponentGenerator\Microsoft.MobileBlazorBindings.ComponentGenerator.csproj", "{514BC0B0-9097-47CF-9CEA-CEB431B828D9}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator", "samples\MobileBlazorBindingsWeather\Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator\Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator.csproj", "{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -1067,6 +1071,30 @@ Global
 		{1D22DA82-38EB-410C-88EA-37D3D786CCC5}.Release|iPhone.Build.0 = Release|Any CPU
 		{1D22DA82-38EB-410C-88EA-37D3D786CCC5}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
 		{1D22DA82-38EB-410C-88EA-37D3D786CCC5}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|Any CPU.Build.0 = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|iPhone.Build.0 = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|iPhone.Build.0 = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -1154,6 +1182,8 @@ Global
 		{965EEC08-D454-44D3-8E53-5DC12CB8801C} = {50192AAF-25B6-447A-99AA-BA8161DBB594}
 		{DA6F7E8F-9A53-42BB-B29E-169C07EA1FD0} = {965EEC08-D454-44D3-8E53-5DC12CB8801C}
 		{1D22DA82-38EB-410C-88EA-37D3D786CCC5} = {175AB6E2-5FB5-4C15-94C2-DCA2EE6B0703}
+		{514BC0B0-9097-47CF-9CEA-CEB431B828D9} = {175AB6E2-5FB5-4C15-94C2-DCA2EE6B0703}
+		{EEA60BDC-FCAB-4154-B64B-F5BA15337A30} = {9B1F38B1-0661-4883-AD4D-ADA9ECA6941B}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {A645A7FF-3F09-414D-A391-7E50C3597F05}

samples/MobileBlazorBindingsWeather/Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator/Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="component-generator.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <AdditionalFiles Include="component-generator.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms.PancakeView" Version="1.4.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\src\Microsoft.MobileBlazorBindings\Microsoft.MobileBlazorBindings.csproj" />
+    <ProjectReference Include="..\..\..\src\Microsoft.MobileBlazorBindings.ComponentGenerator\Microsoft.MobileBlazorBindings.ComponentGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+  </ItemGroup>
+
+</Project>

samples/MobileBlazorBindingsWeather/Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator/component-generator.json

@@ -0,0 +1,6 @@
+{
+  "rootNamespace": "Microsoft.MobileBlazorBindings.PancakeView.Elements",
+  "typesToGenerate": [
+    "Xamarin.Forms.PancakeView.PancakeView"
+  ]
+}

samples/MobileBlazorBindingsWeather/MobileBlazorBindingsWeather/MobileBlazorBindingsWeather.csproj

@@ -11,6 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Microsoft.MobileBlazorBindings.PancakeView\Microsoft.MobileBlazorBindings.PancakeView.csproj" />
+    <ProjectReference Include="..\..\..\src\Microsoft.MobileBlazorBindings\Microsoft.MobileBlazorBindings.csproj" />
+    <ProjectReference Include="..\Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator\Microsoft.MobileBlazorBindings.PancakeView.SourceGenerator.csproj" />
   </ItemGroup>
 </Project>

src/ComponentWrapperGenerator/ComponentWrapperGenerator.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
@@ -17,6 +17,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.8.0" />
     <PackageReference Include="Xamarin.Forms" Version="5.0.0.1874">
       <IncludeAssets></IncludeAssets>
       <PrivateAssets></PrivateAssets>
@@ -29,6 +31,10 @@
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Microsoft.MobileBlazorBindings.ComponentGenerator\Microsoft.MobileBlazorBindings.ComponentGenerator.csproj" />
+  </ItemGroup>
+
   <Target Name="CopyXmlDocsToOutput" AfterTargets="Build">
     <Message Text="Xamarin.Forms package location: $(PkgXamarin_Forms)" />
     <Copy SourceFiles="$(PkgXamarin_Forms)\lib\netstandard2.0\Xamarin.Forms.Core.xml" DestinationFolder="$(OutDir)" />

src/ComponentWrapperGenerator/Program.cs

@@ -1,25 +1,19 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
+using Microsoft.CodeAnalysis;
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Xml;
+using System.Reflection;
+using System.Threading.Tasks;
 
 namespace ComponentWrapperGenerator
 {
+    using Microsoft.MobileBlazorBindings.ComponentGenerator;
+
     internal class Program
     {
-        private static readonly List<ComponentLocation> ComponentLocations =
-            new List<ComponentLocation>
-            {
-                new ComponentLocation(typeof(Xamarin.Forms.Element).Assembly, "Xamarin.Forms", "XF", @"bin\Debug\netcoreapp3.0\Xamarin.Forms.Core.xml"),
-                new ComponentLocation(typeof(Xamarin.Forms.DualScreen.TwoPaneView).Assembly, "Xamarin.Forms.DualScreen", "XFD", null),
-            };
-
-        [System.Diagnostics.CodeAnalysis.SuppressMessage("Globalization", "CA1303:Do not pass literals as localized parameters", Justification = "<Pending>")]
-        internal static int Main(string[] args)
+        internal static async Task<int> Main(string[] args)
         {
             // Un-comment these lines for easier debugging
             if (args.Length == 0)
@@ -45,9 +39,8 @@ internal static int Main(string[] args)
                 RootNamespace = "Microsoft.MobileBlazorBindings.Elements",
             };
 
-            var xmlDocs = LoadXmlDocs(ComponentLocations.Select(loc => loc.XmlDocFilename).Where(loc => loc != null));
-
-            var generator = new ComponentWrapperGenerator(settings, xmlDocs);
+            var compilation = await GetRoslynCompilationAsync().ConfigureAwait(false);
+            var generator = new ComponentWrapperGenerator(settings);
 
             foreach (var typeNameToGenerate in listOfTypeNamesToGenerate)
             {
@@ -62,59 +55,71 @@ internal static int Main(string[] args)
                     continue;
                 }
 
-                if (!TryGetTypeToGenerate(typeNameToGenerate, out var typeToGenerate))
+                var typeToGenerate = compilation.GetTypeByMetadataName(typeNameToGenerate);
+
+                if (typeToGenerate == null)
                 {
                     Console.WriteLine($"WARNING: Couldn't find type {typeNameToGenerate}.");
                     Console.WriteLine();
                     continue;
                 }
-                generator.GenerateComponentWrapper(typeToGenerate, outputFolder);
+
+                var generatedSources = generator.GenerateComponentWrapper(typeToGenerate);
+                WriteFiles(generatedSources, outputFolder);
+
                 Console.WriteLine();
             }
 
             return 0;
         }
 
-        private static IList<XmlDocument> LoadXmlDocs(IEnumerable<string> xmlDocLocations)
+        private static void WriteFiles((string HintName, string Source)[] generatedSources, string outputFolder)
         {
-            var xmlDocs = new List<XmlDocument>();
-            foreach (var xmlDocLocation in xmlDocLocations)
+            foreach(var (hintName, source) in generatedSources)
             {
-                var xmlDoc = new XmlDocument();
+                var fileName = $"{hintName}.generated.cs";
+                var path = hintName.EndsWith("Handler", StringComparison.Ordinal)
+                    ? Path.Combine(outputFolder, "Handlers")
+                    : outputFolder;
 
-                // Depending on whether you run from VS or command line, the relative path of the XML docs will be
-                // different. There's undoubtedly a better way to do this, but this works great.
-                var xmlDocPath = Path.Combine(Directory.GetCurrentDirectory(), xmlDocLocation);
-                if (!File.Exists(xmlDocPath))
-                {
-                    xmlDocPath = Path.Combine(Directory.GetCurrentDirectory(), Path.GetFileName(xmlDocLocation));
-                }
+                Directory.CreateDirectory(path);
 
-                xmlDoc.Load(xmlDocPath);
-                xmlDocs.Add(xmlDoc);
+                File.WriteAllText(Path.Combine(path, fileName), source);
             }
-            return xmlDocs;
         }
 
-        private static bool IsCommentLine(string typeNameToGenerate)
+        private static async Task<Compilation> GetRoslynCompilationAsync()
         {
-            return typeNameToGenerate[0] == '#';
+            var metadataReferences = new[] {
+                MetadataReferenceFromAssembly(typeof(Xamarin.Forms.Element).Assembly),
+                MetadataReferenceFromAssembly(typeof(Xamarin.Forms.DualScreen.TwoPaneView).Assembly),
+                MetadataReferenceFromAssembly(typeof(object).Assembly),
+                MetadataReferenceFromAssembly(Assembly.Load(new AssemblyName("System.Runtime"))),
+                MetadataReferenceFromAssembly(Assembly.Load(new AssemblyName("netstandard")))
+            };
+
+            var projectName = "NewProject";
+            var projectInfo = ProjectInfo.Create(ProjectId.CreateNewId(), VersionStamp.Create(), projectName, projectName, LanguageNames.CSharp,
+                metadataReferences: metadataReferences);
+
+            using var workspace = new AdhocWorkspace();
+            var project = workspace.AddProject(projectInfo);
+
+            return await project.GetCompilationAsync().ConfigureAwait(false);
         }
 
-        private static bool TryGetTypeToGenerate(string typeName, out Type typeToGenerate)
+        private static PortableExecutableReference MetadataReferenceFromAssembly(Assembly assembly)
         {
-            foreach (var componentLocation in ComponentLocations)
-            {
-                var fullTypeName = componentLocation.NamespaceName + "." + typeName;
-                typeToGenerate = componentLocation.Assembly.GetType(fullTypeName);
-                if (typeToGenerate != null)
-                {
-                    return true;
-                }
-            }
+            var assemblyPath = assembly.Location;
+            var xmlDocPath = Path.ChangeExtension(assemblyPath, "xml");
+            var docProvider = File.Exists(xmlDocPath) ? XmlDocumentationProvider.CreateFromFile(xmlDocPath) : null;
+
+            return MetadataReference.CreateFromFile(assemblyPath, documentation: docProvider);
+        }
 
-            typeToGenerate = null;
-            return false;
+        private static bool IsCommentLine(string typeNameToGenerate)
+        {
+            return typeNameToGenerate[0] == '#';
         }
     }
 }