Add AnalyzeOpenDocumentsOnly

package.json

@@ -995,6 +995,11 @@
           "default": false,
           "description": "(EXPERIMENTAL) Enables support for resolving completion edits asynchronously. This can speed up time to show the completion list, particularly override and partial method completion lists, at the cost of slight delays after inserting a completion item. Most completion items will have no noticeable impact with this feature, but typing immediately after inserting an override or partial method completion, before the insert is completed, can have unpredictable results."
         },
+        "omnisharp.analyzeOpenDocumentsOnly": {
+          "type": "boolean",
+          "default": false,
+          "description": "Only run analyzers against open files when 'enableRoslynAnalyzers' is true"
+        },
         "omnisharp.testRunSettings": {
           "type": [
             "string",

src/features/fileOpenCloseProvider.ts

@@ -0,0 +1,74 @@
+import { IDisposable } from "../Disposable";
+import { OmniSharpServer } from "../omnisharp/server";
+import * as vscode from 'vscode';
+import CompositeDisposable from "../CompositeDisposable";
+import * as serverUtils from '../omnisharp/utils';
+import { isVirtualCSharpDocument } from "./virtualDocumentTracker";
+
+export default function fileOpenClose(server: OmniSharpServer): IDisposable {
+    return new FileOpenCloseProvider(server);
+}
+
+class FileOpenCloseProvider implements IDisposable {
+    private _server: OmniSharpServer;
+    private _diagnostics: vscode.DiagnosticCollection;
+    private _disposable: CompositeDisposable;
+
+    constructor(server: OmniSharpServer) {
+        this._server = server;
+        this._diagnostics = vscode.languages.createDiagnosticCollection('csharp');
+
+        setTimeout(async () => {
+            for (let editor of vscode.window.visibleTextEditors) {
+                let document = editor.document;
+
+                await this._onDocumentOpen(document);
+            }
+        }, 0);
+
+        this._disposable = new CompositeDisposable(this._diagnostics,
+            vscode.workspace.onDidOpenTextDocument(this._onDocumentOpen, this),
+            vscode.workspace.onDidCloseTextDocument(this._onDocumentClose, this),
+            vscode.window.onDidChangeActiveTextEditor(this._onActiveTextEditorChange, this)
+        );
+    }
+
+    private async _onDocumentOpen(e: vscode.TextDocument) {
+        if (shouldIgnoreDocument(e)) {
+            return;
+        }
+
+        await serverUtils.fileOpen(this._server, { FileName: e.fileName });
+    }
+
+    private async _onDocumentClose(e: vscode.TextDocument) {
+        if (shouldIgnoreDocument(e)) {
+            return;
+        }
+
+        await serverUtils.fileClose(this._server, { FileName: e.fileName });
+    }
+
+    private async _onActiveTextEditorChange(e: vscode.TextEditor) {
+        if (shouldIgnoreDocument(e.document)) {
+            return;
+        }
+
+        await serverUtils.filesChanged(this._server, [{ FileName: e.document.fileName }]);
+    }
+
+    dispose = () => this._disposable.dispose();
+}
+
+function shouldIgnoreDocument(document: vscode.TextDocument) {
+    if (document.languageId !== 'csharp') {
+        return true;
+    }
+
+    if (document.uri.scheme !== 'file' &&
+        !isVirtualCSharpDocument(document)) {
+        return true;
+    }
+
+    return false;
+}

src/observers/OptionChangeObserver.ts

@@ -24,6 +24,8 @@ const omniSharpOptions: ReadonlyArray<OptionsKey> = [
     "organizeImportsOnFormat",
     "enableAsyncCompletion",
     "useModernNet",
+    "analyzeOpenDocumentsOnly",
+    "enableRoslynAnalyzers"
 ];
 
 function OmniSharpOptionChangeObservable(optionObservable: Observable<Options>): Observable<Options> {

src/omnisharp/extension.ts

@@ -44,6 +44,7 @@ import SemanticTokensProvider from '../features/semanticTokensProvider';
 import SourceGeneratedDocumentProvider from '../features/sourceGeneratedDocumentProvider';
 import { getDecompilationAuthorization } from './decompilationPrompt';
 import { OmniSharpDotnetResolver } from './OmniSharpDotnetResolver';
+import fileOpenClose from '../features/fileOpenCloseProvider';
 
 export interface ActivationResult {
     readonly server: OmniSharpServer;
@@ -111,6 +112,7 @@ export async function activate(context: vscode.ExtensionContext, packageJSON: an
         localDisposables.add(forwardChanges(server));
         localDisposables.add(trackVirtualDocuments(server, eventStream));
         localDisposables.add(vscode.languages.registerFoldingRangeProvider(documentSelector, new StructureProvider(server, languageMiddlewareFeature)));
+        localDisposables.add(fileOpenClose(server));
 
         const semanticTokensProvider = new SemanticTokensProvider(server, optionProvider, languageMiddlewareFeature);
         localDisposables.add(vscode.languages.registerDocumentSemanticTokensProvider(documentSelector, semanticTokensProvider, semanticTokensProvider.getLegend()));

src/omnisharp/options.ts

@@ -34,6 +34,7 @@ export class Options {
         public enableDecompilationSupport: boolean,
         public enableImportCompletion: boolean,
         public enableAsyncCompletion: boolean,
+        public analyzeOpenDocumentsOnly: boolean,
         public useSemanticHighlighting: boolean,
         public razorPluginPath?: string,
         public defaultLaunchSolution?: string,
@@ -82,6 +83,7 @@ export class Options {
         const enableDecompilationSupport = omnisharpConfig.get<boolean>('enableDecompilationSupport', false);
         const enableImportCompletion = omnisharpConfig.get<boolean>('enableImportCompletion', false);
         const enableAsyncCompletion = omnisharpConfig.get<boolean>('enableAsyncCompletion', false);
+        const analyzeOpenDocumentsOnly = omnisharpConfig.get<boolean>('analyzeOpenDocumentsOnly', false);
 
         const useFormatting = csharpConfig.get<boolean>('format.enable', true);
         const organizeImportsOnFormat = omnisharpConfig.get<boolean>('organizeImportsOnFormat', false);
@@ -141,6 +143,7 @@ export class Options {
             enableDecompilationSupport,
             enableImportCompletion,
             enableAsyncCompletion,
+            analyzeOpenDocumentsOnly,
             useSemanticHighlighting,
             razorPluginPath,
             defaultLaunchSolution,

src/omnisharp/protocol.ts

@@ -37,6 +37,8 @@ export module Requests {
     export const SourceGeneratedFile = '/sourcegeneratedfile';
     export const UpdateSourceGeneratedFile = '/updatesourcegeneratedfile';
     export const SourceGeneratedFileClosed = '/sourcegeneratedfileclosed';
+    export const FileOpen = '/open';
+    export const FileClose = '/close';
 }
 
 export namespace WireProtocol {

src/omnisharp/server.ts

@@ -391,6 +391,10 @@ export class OmniSharpServer {
             args.push('RoslynExtensionsOptions:EnableAsyncCompletion=true');
         }
 
+        if (options.analyzeOpenDocumentsOnly === true) {
+            args.push('RoslynExtensionsOptions:AnalyzeOpenDocumentsOnly=true');
+        }
+
         let launchInfo: LaunchInfo;
         try {
             launchInfo = await this._omnisharpManager.GetOmniSharpLaunchInfo(this.packageJSON.defaults.omniSharp, options.path, /* useFramework */ !options.useModernNet, serverUrl, latestVersionFileServerPath, installPath, this.extensionPath);

src/omnisharp/utils.ts

@@ -193,6 +193,14 @@ export async function getCompletionAfterInsert(server: OmniSharpServer, request:
     return server.makeRequest<protocol.CompletionAfterInsertResponse>(protocol.Requests.CompletionAfterInsert, request);
 }
 
+export async function fileOpen(server: OmniSharpServer, request: protocol.Request) {
+    return server.makeRequest<void>(protocol.Requests.FileOpen, request);
+}
+
+export async function fileClose(server: OmniSharpServer, request: protocol.Request) {
+    return server.makeRequest<void>(protocol.Requests.FileClose, request);
+}
+
 export async function isNetCoreProject(project: protocol.MSBuildProject) {
     return project.TargetFrameworks.find(tf => tf.ShortName.startsWith('netcoreapp') || tf.ShortName.startsWith('netstandard')) !== undefined;
 }

test/unitTests/Fakes/FakeOptions.ts

@@ -6,5 +6,5 @@
 import { Options } from "../../../src/omnisharp/options";
 
 export function getEmptyOptions(): Options {
-    return new Options("", false, "", false, "", false, 0, 0, false, false, false, false, false, [], false, false, false, 0, 0, false, false, false, false, false, false, false, false, undefined, "", "", "");
+    return new Options("", false, "", false, "", false, 0, 0, false, false, false, false, false, [], false, false, false, 0, 0, false, false, false, false, false, false, false, false, false, undefined, "", "", "");
 }

test/unitTests/options.test.ts

@@ -34,6 +34,7 @@ suite("Options tests", () => {
         options.enableEditorConfigSupport.should.equal(false);
         options.enableDecompilationSupport.should.equal(false);
         options.enableImportCompletion.should.equal(false);
+        options.analyzeOpenDocumentsOnly.should.equal(false);
         expect(options.testRunSettings).to.be.undefined;
         expect(options.defaultLaunchSolution).to.be.undefined;
     });