Add API option to getCompletionsAtPosition to expose completion symbol information

src/services/completions.ts

@@ -646,6 +646,7 @@ export function getCompletionsAtPosition(
     completionKind: CompletionTriggerKind | undefined,
     cancellationToken: CancellationToken,
     formatContext?: formatting.FormatContext,
+    includeSymbol = false
 ): CompletionInfo | undefined {
     const { previousToken } = getRelevantTokens(position, sourceFile);
     if (triggerCharacter && !isInString(sourceFile, position, previousToken) && !isValidTrigger(sourceFile, triggerCharacter, previousToken, position)) {
@@ -675,7 +676,7 @@ export function getCompletionsAtPosition(
         incompleteCompletionsCache?.clear();
     }
 
-    const stringCompletions = StringCompletions.getStringLiteralCompletions(sourceFile, position, previousToken, compilerOptions, host, program, log, preferences);
+    const stringCompletions = StringCompletions.getStringLiteralCompletions(sourceFile, position, previousToken, compilerOptions, host, program, log, preferences, includeSymbol);
     if (stringCompletions) {
         return stringCompletions;
     }
@@ -692,7 +693,7 @@ export function getCompletionsAtPosition(
 
     switch (completionData.kind) {
         case CompletionDataKind.Data:
-            const response = completionInfoFromData(sourceFile, host, program, compilerOptions, log, completionData, preferences, formatContext, position);
+            const response = completionInfoFromData(sourceFile, host, program, compilerOptions, log, completionData, preferences, formatContext, position, includeSymbol);
             if (response?.isIncomplete) {
                 incompleteCompletionsCache?.set(response);
             }
@@ -866,7 +867,8 @@ function completionInfoFromData(
     completionData: CompletionData,
     preferences: UserPreferences,
     formatContext: formatting.FormatContext | undefined,
-    position: number
+    position: number,
+    includeSymbol: boolean | undefined,
 ): CompletionInfo | undefined {
     const {
         symbols,
@@ -951,6 +953,7 @@ function completionInfoFromData(
         symbolToSortTextMap,
         isJsxIdentifierExpected,
         isRightOfOpenTag,
+        includeSymbol
     );
 
     if (keywordFilters !== KeywordCompletionFilters.None) {
@@ -1339,6 +1342,7 @@ function createCompletionEntry(
     formatContext: formatting.FormatContext | undefined,
     isJsxIdentifierExpected: boolean | undefined,
     isRightOfOpenTag: boolean | undefined,
+    includeSymbol: boolean
 ): CompletionEntry | undefined {
     let insertText: string | undefined;
     let replacementSpan = getReplacementSpanForContextToken(replacementToken);
@@ -1492,6 +1496,7 @@ function createCompletionEntry(
         isPackageJsonImport: originIsPackageJsonImport(origin) || undefined,
         isImportStatementCompletion: !!importStatementCompletion || undefined,
         data,
+        ...includeSymbol ? { symbol } : undefined
     };
 }
 
@@ -2119,6 +2124,7 @@ export function getCompletionEntriesFromSymbols(
     symbolToSortTextMap?: SymbolSortTextMap,
     isJsxIdentifierExpected?: boolean,
     isRightOfOpenTag?: boolean,
+    includeSymbol = false
 ): UniqueNameSet {
     const start = timestamp();
     const variableDeclaration = getVariableDeclaration(location);
@@ -2164,6 +2170,7 @@ export function getCompletionEntriesFromSymbols(
             formatContext,
             isJsxIdentifierExpected,
             isRightOfOpenTag,
+            includeSymbol
         );
         if (!entry) {
             continue;

src/services/services.ts

@@ -1990,7 +1990,8 @@ export function createLanguageService(
             options.triggerCharacter,
             options.triggerKind,
             cancellationToken,
-            formattingSettings && formatting.getFormatContext(formattingSettings, host));
+            formattingSettings && formatting.getFormatContext(formattingSettings, host),
+            options.includeSymbol);
     }
 
     function getCompletionEntryDetails(fileName: string, position: number, name: string, formattingOptions: FormatCodeSettings | undefined, source: string | undefined, preferences: UserPreferences = emptyOptions, data?: CompletionEntryData): CompletionEntryDetails | undefined {

src/services/stringCompletions.ts

@@ -190,15 +190,16 @@ export function getStringLiteralCompletions(
     host: LanguageServiceHost,
     program: Program,
     log: Log,
-    preferences: UserPreferences): CompletionInfo | undefined {
+    preferences: UserPreferences,
+    includeSymbol: boolean): CompletionInfo | undefined {
     if (isInReferenceComment(sourceFile, position)) {
         const entries = getTripleSlashReferenceCompletion(sourceFile, position, options, host);
         return entries && convertPathCompletions(entries);
     }
     if (isInString(sourceFile, position, contextToken)) {
         if (!contextToken || !isStringLiteralLike(contextToken)) return undefined;
         const entries = getStringLiteralCompletionEntries(sourceFile, contextToken, position, program.getTypeChecker(), options, host, preferences);
-        return convertStringLiteralCompletions(entries, contextToken, sourceFile, host, program, log, options, preferences, position);
+        return convertStringLiteralCompletions(entries, contextToken, sourceFile, host, program, log, options, preferences, position, includeSymbol);
     }
 }
 
@@ -212,6 +213,7 @@ function convertStringLiteralCompletions(
     options: CompilerOptions,
     preferences: UserPreferences,
     position: number,
+    includeSymbol: boolean,
 ): CompletionInfo | undefined {
     if (completion === undefined) {
         return undefined;
@@ -239,6 +241,17 @@ function convertStringLiteralCompletions(
                 preferences,
                 options,
                 /*formatContext*/ undefined,
+                /*isTypeOnlyLocation */ undefined,
+                /*propertyAccessToConvert*/ undefined,
+                /*jsxIdentifierExpected*/ undefined,
+                /*isJsxInitializer*/ undefined,
+                /*importStatementCompletion*/ undefined,
+                /*recommendedCompletion*/ undefined,
+                /*symbolToOriginInfoMap*/ undefined,
+                /*symbolToSortTextMap*/ undefined,
+                /*isJsxIdentifierExpected*/ undefined,
+                /*isRightOfOpenTag*/ undefined,
+                includeSymbol
             ); // Target will not be used, so arbitrary
             return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: completion.hasIndexSignature, optionalReplacementSpan, entries };
         }

src/services/types.ts

@@ -700,6 +700,13 @@ export interface GetCompletionsAtPositionOptions extends UserPreferences {
      */
     triggerCharacter?: CompletionsTriggerCharacter;
     triggerKind?: CompletionTriggerKind;
+    /**
+     * Include a `symbol` property on each completion entry object.
+     * Symbols reference cyclic data structures and sometimes an entire TypeChecker instance,
+     * so use caution when serializing or retaining completion entries retrieved with this option.
+     * @default false
+     */
+    includeSymbol?: boolean
     /** @deprecated Use includeCompletionsForModuleExports */
     includeExternalModuleExports?: boolean;
     /** @deprecated Use includeCompletionsWithInsertText */
@@ -1379,6 +1386,12 @@ export interface CompletionEntry {
     isFromUncheckedFile?: true;
     isPackageJsonImport?: true;
     isImportStatementCompletion?: true;
+    /**
+     * For API purposes.
+     * Included for non-string completions only when `includeSymbol: true` option is passed to `getCompletionsAtPosition`.
+     * @example Get declaration of completion: `symbol.valueDeclaration`
+     */
+    symbol?: Symbol
     /**
      * A property to be sent back to TS Server in the CompletionDetailsRequest, along with `name`,
      * that allows TS Server to look up the symbol represented by the completion item, disambiguating

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -10072,6 +10072,13 @@ declare namespace ts {
          */
         triggerCharacter?: CompletionsTriggerCharacter;
         triggerKind?: CompletionTriggerKind;
+        /**
+         * Include a `symbol` property on each completion entry object.
+         * Symbols reference cyclic data structures and sometimes an entire TypeChecker instance,
+         * so use caution when serializing or retaining completion entries retrieved with this option.
+         * @default false
+         */
+        includeSymbol?: boolean;
         /** @deprecated Use includeCompletionsForModuleExports */
         includeExternalModuleExports?: boolean;
         /** @deprecated Use includeCompletionsWithInsertText */
@@ -10629,6 +10636,12 @@ declare namespace ts {
         isFromUncheckedFile?: true;
         isPackageJsonImport?: true;
         isImportStatementCompletion?: true;
+        /**
+         * For API purposes.
+         * Included for non-string completions only when `includeSymbol: true` option is passed to `getCompletionsAtPosition`.
+         * @example Get declaration of completion: `symbol.valueDeclaration`
+         */
+        symbol?: Symbol;
         /**
          * A property to be sent back to TS Server in the CompletionDetailsRequest, along with `name`,
          * that allows TS Server to look up the symbol represented by the completion item, disambiguating

tests/baselines/reference/api/typescript.d.ts

@@ -6170,6 +6170,13 @@ declare namespace ts {
          */
         triggerCharacter?: CompletionsTriggerCharacter;
         triggerKind?: CompletionTriggerKind;
+        /**
+         * Include a `symbol` property on each completion entry object.
+         * Symbols reference cyclic data structures and sometimes an entire TypeChecker instance,
+         * so use caution when serializing or retaining completion entries retrieved with this option.
+         * @default false
+         */
+        includeSymbol?: boolean;
         /** @deprecated Use includeCompletionsForModuleExports */
         includeExternalModuleExports?: boolean;
         /** @deprecated Use includeCompletionsWithInsertText */
@@ -6727,6 +6734,12 @@ declare namespace ts {
         isFromUncheckedFile?: true;
         isPackageJsonImport?: true;
         isImportStatementCompletion?: true;
+        /**
+         * For API purposes.
+         * Included for non-string completions only when `includeSymbol: true` option is passed to `getCompletionsAtPosition`.
+         * @example Get declaration of completion: `symbol.valueDeclaration`
+         */
+        symbol?: Symbol;
         /**
          * A property to be sent back to TS Server in the CompletionDetailsRequest, along with `name`,
          * that allows TS Server to look up the symbol represented by the completion item, disambiguating