Introduce configuration for "Go to Symbol in Workspace"

package.json

@@ -587,6 +587,16 @@
           "default": true,
           "description": "Specifes whether OmniSharp should use VS Code editor settings for C# code formatting (use of tabs, indentation size)."
         },
+        "omnisharp.minFindSymbolsFilterLength": {
+          "type": "number",
+          "default": 0,
+          "description": "The minimum number of characters to enter before 'Go to Symbol in Workspace' operation shows any results."
+        },
+        "omnisharp.maxFindSymbolsItems": {
+          "type": "number",
+          "default": 1000,
+          "description": "The maximum number of items that 'Go to Symbol in Workspace' operation can show. The limit is applied only when a positive number is specified here."
+        },
         "omnisharp.disableMSBuildDiagnosticWarning": {
           "type": "boolean",
           "default": false,

src/features/workspaceSymbolProvider.ts

@@ -1,56 +1,65 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-import AbstractSupport from './abstractProvider';
-import * as protocol from '../omnisharp/protocol';
-import * as serverUtils from '../omnisharp/utils';
-import {toRange} from '../omnisharp/typeConvertion';
-import {CancellationToken, Uri, WorkspaceSymbolProvider, SymbolInformation, SymbolKind} from 'vscode';
-
-
-export default class OmnisharpWorkspaceSymbolProvider extends AbstractSupport implements WorkspaceSymbolProvider {
-
-    public async provideWorkspaceSymbols(search: string, token: CancellationToken): Promise<SymbolInformation[]> {
-
-        return serverUtils.findSymbols(this._server, { Filter: search, FileName: '' }, token).then(res => {
-            if (res && Array.isArray(res.QuickFixes)) {
-                return res.QuickFixes.map(OmnisharpWorkspaceSymbolProvider._asSymbolInformation);
-            }
-        });
-    }
-
-    private static _asSymbolInformation(symbolInfo: protocol.SymbolLocation): SymbolInformation {
-
-        return new SymbolInformation(symbolInfo.Text, OmnisharpWorkspaceSymbolProvider._toKind(symbolInfo),
-            toRange(symbolInfo),
-            Uri.file(symbolInfo.FileName));
-    }
-
-    private static _toKind(symbolInfo: protocol.SymbolLocation): SymbolKind {
-        switch (symbolInfo.Kind) {
-            case 'Method':
-                return SymbolKind.Method;
-            case 'Field':
-                return SymbolKind.Field;
-            case 'Property':
-                return SymbolKind.Property;
-            case 'Interface':
-                return SymbolKind.Interface;
-            case 'Enum':
-                return SymbolKind.Enum;
-            case 'Struct':
-                return SymbolKind.Struct;
-            case 'Event':
-                return SymbolKind.Event;
-            case 'EnumMember':
-                return SymbolKind.EnumMember;
-            case 'Class':
-                return SymbolKind.Class;
-            default:
-                return SymbolKind.Class;
-
-        }
-    }
-}
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import AbstractSupport from './abstractProvider';
+import { OmniSharpServer } from '../omnisharp/server';
+import OptionProvider from '../observers/OptionProvider';
+import * as protocol from '../omnisharp/protocol';
+import * as serverUtils from '../omnisharp/utils';
+import {toRange} from '../omnisharp/typeConvertion';
+import {CancellationToken, Uri, WorkspaceSymbolProvider, SymbolInformation, SymbolKind} from 'vscode';
+
+
+export default class OmnisharpWorkspaceSymbolProvider extends AbstractSupport implements WorkspaceSymbolProvider {
+
+    constructor(server: OmniSharpServer, private optionProvider: OptionProvider) {
+        super(server);
+    }
+
+    public async provideWorkspaceSymbols(search: string, token: CancellationToken): Promise<SymbolInformation[]> {
+
+        let options = this.optionProvider.GetLatestOptions();
+        let minFilterLength = options.minFindSymbolsFilterLength > 0 ? options.minFindSymbolsFilterLength : undefined;
+        let maxItemsToReturn = options.maxFindSymbolsItems > 0 ? options.maxFindSymbolsItems : undefined;
+        return serverUtils.findSymbols(this._server, { Filter: search, MinFilterLength: minFilterLength, MaxItemsToReturn: maxItemsToReturn, FileName: '' }, token).then(res => {
+            if (res && Array.isArray(res.QuickFixes)) {
+                return res.QuickFixes.map(OmnisharpWorkspaceSymbolProvider._asSymbolInformation);
+            }
+        });
+    }
+
+    private static _asSymbolInformation(symbolInfo: protocol.SymbolLocation): SymbolInformation {
+
+        return new SymbolInformation(symbolInfo.Text, OmnisharpWorkspaceSymbolProvider._toKind(symbolInfo),
+            toRange(symbolInfo),
+            Uri.file(symbolInfo.FileName));
+    }
+
+    private static _toKind(symbolInfo: protocol.SymbolLocation): SymbolKind {
+        switch (symbolInfo.Kind) {
+            case 'Method':
+                return SymbolKind.Method;
+            case 'Field':
+                return SymbolKind.Field;
+            case 'Property':
+                return SymbolKind.Property;
+            case 'Interface':
+                return SymbolKind.Interface;
+            case 'Enum':
+                return SymbolKind.Enum;
+            case 'Struct':
+                return SymbolKind.Struct;
+            case 'Event':
+                return SymbolKind.Event;
+            case 'EnumMember':
+                return SymbolKind.EnumMember;
+            case 'Class':
+                return SymbolKind.Class;
+            default:
+                return SymbolKind.Class;
+
+        }
+    }
+}

src/omnisharp/extension.ts

@@ -77,7 +77,7 @@ export async function activate(context: vscode.ExtensionContext, packageJSON: an
             localDisposables.add(vscode.languages.registerOnTypeFormattingEditProvider(documentSelector, new FormatProvider(server), '}', ';'));
         }
         localDisposables.add(vscode.languages.registerCompletionItemProvider(documentSelector, new CompletionItemProvider(server), '.', ' '));
-        localDisposables.add(vscode.languages.registerWorkspaceSymbolProvider(new WorkspaceSymbolProvider(server)));
+        localDisposables.add(vscode.languages.registerWorkspaceSymbolProvider(new WorkspaceSymbolProvider(server, optionProvider)));
         localDisposables.add(vscode.languages.registerSignatureHelpProvider(documentSelector, new SignatureHelpProvider(server), '(', ','));
         const codeActionProvider = new CodeActionProvider(server, optionProvider);
         localDisposables.add(codeActionProvider);

src/omnisharp/options.ts

@@ -20,6 +20,8 @@ export class Options {
         public showTestsCodeLens: boolean,
         public disableCodeActions: boolean,
         public disableMSBuildDiagnosticWarning: boolean,
+        public minFindSymbolsFilterLength: number,
+        public maxFindSymbolsItems: number,
         public defaultLaunchSolution?: string,
         public monoPath?: string) { }
 
@@ -63,6 +65,9 @@ export class Options {
 
         const disableMSBuildDiagnosticWarning = omnisharpConfig.get<boolean>('disableMSBuildDiagnosticWarning', false);
 
+        const minFindSymbolsFilterLength = omnisharpConfig.get<number>('minFindSymbolsFilterLength', 0);
+        const maxFindSymbolsItems = omnisharpConfig.get<number>('maxFindSymbolsItems', 1000);   // The limit is applied only when this setting is set to a number greater than zero
+
         return new Options(
             path, 
             useGlobalMono, 
@@ -77,6 +82,8 @@ export class Options {
             showTestsCodeLens,
             disableCodeActions,
             disableMSBuildDiagnosticWarning,
+            minFindSymbolsFilterLength,
+            maxFindSymbolsItems,
             defaultLaunchSolution,
             monoPath,
         );

src/omnisharp/protocol.ts

@@ -128,6 +128,8 @@ export interface FindUsagesRequest extends Request {
 
 export interface FindSymbolsRequest extends Request {
     Filter: string;
+    MinFilterLength?: number;
+    MaxItemsToReturn?: number;
 }
 
 export interface FormatRequest extends Request {

test/unitTests/Fakes/FakeOptions.ts

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

test/unitTests/optionStream.test.ts

@@ -49,7 +49,9 @@ suite('OptionStream', () => {
             options.showReferencesCodeLens.should.equal(true);
             options.showTestsCodeLens.should.equal(true);
             options.disableCodeActions.should.equal(false);
-            expect(options.defaultLaunchSolution).to.be.undefined;
+            options.minFindSymbolsFilterLength.should.equal(0);
+            options.maxFindSymbolsItems.should.equal(1000);
+                expect(options.defaultLaunchSolution).to.be.undefined;
         });
 
         test('Gives the changed option when the omnisharp config changes', () => {

test/unitTests/options.test.ts

@@ -28,6 +28,8 @@ suite("Options tests", () => {
         options.showTestsCodeLens.should.equal(true);
         options.disableCodeActions.should.equal(false);
         options.disableCodeActions.should.equal(false);
+        options.minFindSymbolsFilterLength.should.equal(0);
+        options.maxFindSymbolsItems.should.equal(1000);
         expect(options.defaultLaunchSolution).to.be.undefined;
     });