Add commit characters to protocol

src/harness/client.ts

@@ -300,6 +300,7 @@ export class SessionClient implements LanguageService {
 
                 return entry as { name: string; kind: ScriptElementKind; kindModifiers: string; sortText: string; }; // TODO: GH#18217
             }),
+            defaultCommitCharacters: response.body!.defaultCommitCharacters,
         };
     }
 

src/harness/fourslashImpl.ts

@@ -1024,7 +1024,7 @@ export class TestState {
         }
 
         if (ts.hasProperty(options, "isGlobalCompletion") && actualCompletions.isGlobalCompletion !== options.isGlobalCompletion) {
-            this.raiseError(`Expected 'isGlobalCompletion to be ${options.isGlobalCompletion}, got ${actualCompletions.isGlobalCompletion}`);
+            this.raiseError(`Expected 'isGlobalCompletion' to be ${options.isGlobalCompletion}, got ${actualCompletions.isGlobalCompletion}`);
         }
 
         if (ts.hasProperty(options, "optionalReplacementSpan")) {
@@ -1035,6 +1035,14 @@ export class TestState {
             );
         }
 
+        if (ts.hasProperty(options, "defaultCommitCharacters")) {
+            assert.deepEqual(
+                actualCompletions.defaultCommitCharacters?.sort(),
+                options.defaultCommitCharacters?.sort(),
+                "Expected 'defaultCommitCharacters' properties to match",
+            );
+        }
+
         const nameToEntries = new Map<string, ts.CompletionEntry[]>();
         const nameAndSourceToData = new Map<string, ts.CompletionEntryData | false>();
         for (const entry of actualCompletions.entries) {
@@ -1181,6 +1189,13 @@ export class TestState {
         assert.equal(actual.isSnippet, expected.isSnippet, `At entry ${actual.name}: Expected 'isSnippet' properties to match`);
         assert.equal(actual.source, expected.source, `At entry ${actual.name}: Expected 'source' values to match`);
         assert.equal(actual.sortText, expected.sortText || ts.Completions.SortText.LocationPriority, `At entry ${actual.name}: Expected 'sortText' properties to match`);
+        if (ts.hasProperty(expected, "commitCharacters")) {
+            assert.deepEqual(
+                actual.commitCharacters?.sort(),
+                expected.commitCharacters?.sort(),
+                `At entry ${actual.name}: Expected 'commitCharacters' values to match`,
+            );
+        }
         if (expected.sourceDisplay && actual.sourceDisplay) {
             assert.equal(ts.displayPartsToString(actual.sourceDisplay), expected.sourceDisplay, `At entry ${actual.name}: Expected 'sourceDisplay' properties to match`);
         }

src/harness/fourslashInterfaceImpl.ts

@@ -1797,6 +1797,7 @@ export interface ExpectedCompletionEntryObject {
     readonly labelDetails?: ExpectedCompletionEntryLabelDetails;
     readonly tags?: readonly ts.JSDocTagInfo[];
     readonly sortText?: ts.Completions.SortText;
+    readonly commitCharacters?: string[]; // If not specified, won't assert about this
 }
 
 export interface ExpectedCompletionEntryLabelDetails {
@@ -1820,6 +1821,7 @@ export interface VerifyCompletionsOptions {
     readonly excludes?: ArrayOrSingle<string>;
     readonly preferences?: ts.UserPreferences;
     readonly triggerCharacter?: ts.CompletionsTriggerCharacter;
+    readonly defaultCommitCharacters?: string[]; // Only tested if set
 }
 
 export interface VerifySignatureHelpOptions {

src/services/completions.ts

@@ -682,6 +682,14 @@ function resolvingModuleSpecifiers<TReturn>(
     }
 }
 
+/** @internal */
+export function getDefaultCommitCharacters(isNewIdentifierLocation: boolean): string[] {
+    if (isNewIdentifierLocation) {
+        return [];
+    }
+    return [".", ",", ";"];
+}
+
 /** @internal */
 export function getCompletionsAtPosition(
     host: LanguageServiceHost,
@@ -704,7 +712,14 @@ export function getCompletionsAtPosition(
     if (triggerCharacter === " ") {
         // `isValidTrigger` ensures we are at `import |`
         if (preferences.includeCompletionsForImportStatements && preferences.includeCompletionsWithInsertText) {
-            return { isGlobalCompletion: true, isMemberCompletion: false, isNewIdentifierLocation: true, isIncomplete: true, entries: [] };
+            return {
+                isGlobalCompletion: true,
+                isMemberCompletion: false,
+                isNewIdentifierLocation: true,
+                isIncomplete: true,
+                entries: [],
+                defaultCommitCharacters: getDefaultCommitCharacters(/*isNewIdentifierLocation*/ true),
+            };
         }
         return undefined;
     }
@@ -887,7 +902,13 @@ function continuePreviousIncompleteResponse(
 }
 
 function jsdocCompletionInfo(entries: CompletionEntry[]): CompletionInfo {
-    return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries };
+    return {
+        isGlobalCompletion: false,
+        isMemberCompletion: false,
+        isNewIdentifierLocation: false,
+        entries,
+        defaultCommitCharacters: getDefaultCommitCharacters(/*isNewIdentifierLocation*/ false),
+    };
 }
 
 function getJSDocParameterCompletions(
@@ -1210,6 +1231,7 @@ function specificKeywordCompletionInfo(entries: readonly CompletionEntry[], isNe
         isMemberCompletion: false,
         isNewIdentifierLocation,
         entries: entries.slice(),
+        defaultCommitCharacters: getDefaultCommitCharacters(isNewIdentifierLocation),
     };
 }
 
@@ -1385,6 +1407,7 @@ function completionInfoFromData(
         isNewIdentifierLocation,
         optionalReplacementSpan: getOptionalReplacementSpan(location),
         entries,
+        defaultCommitCharacters: getDefaultCommitCharacters(isNewIdentifierLocation),
     };
 }
 
@@ -1593,7 +1616,14 @@ function getJsxClosingTagCompletion(location: Node | undefined, sourceFile: Sour
             kindModifiers: undefined,
             sortText: SortText.LocationPriority,
         };
-        return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: false, optionalReplacementSpan: replacementSpan, entries: [entry] };
+        return {
+            isGlobalCompletion: false,
+            isMemberCompletion: true,
+            isNewIdentifierLocation: false,
+            optionalReplacementSpan: replacementSpan,
+            entries: [entry],
+            defaultCommitCharacters: getDefaultCommitCharacters(/*isNewIdentifierLocation*/ false),
+        };
     }
     return;
 }
@@ -1619,6 +1649,7 @@ function getJSCompletionEntries(
                 kindModifiers: "",
                 sortText: SortText.JavascriptIdentifiers,
                 isFromUncheckedFile: true,
+                commitCharacters: [],
             }, compareCompletionEntries);
         }
     });
@@ -1630,7 +1661,13 @@ function completionNameForLiteral(sourceFile: SourceFile, preferences: UserPrefe
 }
 
 function createCompletionEntryForLiteral(sourceFile: SourceFile, preferences: UserPreferences, literal: string | number | PseudoBigInt): CompletionEntry {
-    return { name: completionNameForLiteral(sourceFile, preferences, literal), kind: ScriptElementKind.string, kindModifiers: ScriptElementKindModifier.none, sortText: SortText.LocationPriority };
+    return {
+        name: completionNameForLiteral(sourceFile, preferences, literal),
+        kind: ScriptElementKind.string,
+        kindModifiers: ScriptElementKindModifier.none,
+        sortText: SortText.LocationPriority,
+        commitCharacters: [],
+    };
 }
 
 function createCompletionEntry(
@@ -1860,9 +1897,11 @@ function createCompletionEntry(
 
     // Use a 'sortText' of 0' so that all symbol completion entries come before any other
     // entries (like JavaScript identifier entries).
+    const kind = SymbolDisplay.getSymbolKind(typeChecker, symbol, location);
+    const commitCharacters = (kind === ScriptElementKind.warning || kind === ScriptElementKind.string) ? [] : undefined;
     return {
         name,
-        kind: SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
+        kind,
         kindModifiers: SymbolDisplay.getSymbolModifiers(typeChecker, symbol),
         sortText,
         source,
@@ -1877,6 +1916,7 @@ function createCompletionEntry(
         isPackageJsonImport: originIsPackageJsonImport(origin) || undefined,
         isImportStatementCompletion: !!importStatementCompletion || undefined,
         data,
+        commitCharacters,
         ...includeSymbol ? { symbol } : undefined,
     };
 }
@@ -2748,7 +2788,13 @@ export function getCompletionEntriesFromSymbols(
 function getLabelCompletionAtPosition(node: BreakOrContinueStatement): CompletionInfo | undefined {
     const entries = getLabelStatementCompletions(node);
     if (entries.length) {
-        return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries };
+        return {
+            isGlobalCompletion: false,
+            isMemberCompletion: false,
+            isNewIdentifierLocation: false,
+            entries,
+            defaultCommitCharacters: getDefaultCommitCharacters(/*isNewIdentifierLocation*/ false),
+        };
     }
 }
 

src/services/stringCompletions.ts

@@ -4,6 +4,7 @@ import {
     createCompletionDetails,
     createCompletionDetailsForSymbol,
     getCompletionEntriesFromSymbols,
+    getDefaultCommitCharacters,
     getPropertiesForObjectExpression,
     Log,
     SortText,
@@ -260,7 +261,14 @@ function convertStringLiteralCompletions(
                 /*isRightOfOpenTag*/ undefined,
                 includeSymbol,
             ); // Target will not be used, so arbitrary
-            return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: completion.hasIndexSignature, optionalReplacementSpan, entries };
+            return {
+                isGlobalCompletion: false,
+                isMemberCompletion: true,
+                isNewIdentifierLocation: completion.hasIndexSignature,
+                optionalReplacementSpan,
+                entries,
+                defaultCommitCharacters: getDefaultCommitCharacters(completion.hasIndexSignature),
+            };
         }
         case StringLiteralCompletionKind.Types: {
             const quoteChar = contextToken.kind === SyntaxKind.NoSubstitutionTemplateLiteral
@@ -274,8 +282,16 @@ function convertStringLiteralCompletions(
                 kind: ScriptElementKind.string,
                 sortText: SortText.LocationPriority,
                 replacementSpan: getReplacementSpanForContextToken(contextToken, position),
+                commitCharacters: [],
             }));
-            return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: completion.isNewIdentifier, optionalReplacementSpan, entries };
+            return {
+                isGlobalCompletion: false,
+                isMemberCompletion: false,
+                isNewIdentifierLocation: completion.isNewIdentifier,
+                optionalReplacementSpan,
+                entries,
+                defaultCommitCharacters: getDefaultCommitCharacters(completion.isNewIdentifier),
+            };
         }
         default:
             return Debug.assertNever(completion);
@@ -310,7 +326,13 @@ function convertPathCompletions(pathCompletions: readonly PathCompletion[]): Com
     const isGlobalCompletion = false; // We don't want the editor to offer any other completions, such as snippets, inside a comment.
     const isNewIdentifierLocation = true; // The user may type in a path that doesn't yet exist, creating a "new identifier" with respect to the collection of identifiers the server is aware of.
     const entries = pathCompletions.map(({ name, kind, span, extension }): CompletionEntry => ({ name, kind, kindModifiers: kindModifiersFromExtension(extension), sortText: SortText.LocationPriority, replacementSpan: span }));
-    return { isGlobalCompletion, isMemberCompletion: false, isNewIdentifierLocation, entries };
+    return {
+        isGlobalCompletion,
+        isMemberCompletion: false,
+        isNewIdentifierLocation,
+        entries,
+        defaultCommitCharacters: getDefaultCommitCharacters(isNewIdentifierLocation),
+    };
 }
 function kindModifiersFromExtension(extension: Extension | undefined): ScriptElementKindModifier {
     switch (extension) {

src/services/types.ts

@@ -1439,6 +1439,10 @@ export interface CompletionInfo {
      */
     isIncomplete?: true;
     entries: CompletionEntry[];
+    /**
+     * Default commit characters for the completion entries.
+     */
+    defaultCommitCharacters?: string[];
 }
 
 export interface CompletionEntryDataAutoImport {
@@ -1551,6 +1555,10 @@ export interface CompletionEntry {
      * is an auto-import.
      */
     data?: CompletionEntryData;
+    /**
+     * If this completion entry is selected, typing a commit character will cause the entry to be accepted.
+     */
+    commitCharacters?: string[];
 }
 
 export interface CompletionEntryLabelDetails {

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

@@ -10695,6 +10695,10 @@ declare namespace ts {
          */
         isIncomplete?: true;
         entries: CompletionEntry[];
+        /**
+         * Default commit characters for the completion entries.
+         */
+        defaultCommitCharacters?: string[];
     }
     interface CompletionEntryDataAutoImport {
         /**
@@ -10801,6 +10805,10 @@ declare namespace ts {
          * is an auto-import.
          */
         data?: CompletionEntryData;
+        /**
+         * If this completion entry is selected, typing a commit character will cause the entry to be accepted.
+         */
+        commitCharacters?: string[];
     }
     interface CompletionEntryLabelDetails {
         /**

tests/baselines/reference/completionEntryForUnionMethod.baseline

@@ -4689,6 +4689,11 @@
             }
           ]
         }
+      ],
+      "defaultCommitCharacters": [
+        ".",
+        ",",
+        ";"
       ]
     }
   }

tests/baselines/reference/completionForStringLiteralImport3.baseline

@@ -16,7 +16,8 @@
       "isGlobalCompletion": false,
       "isMemberCompletion": false,
       "isNewIdentifierLocation": true,
-      "entries": []
+      "entries": [],
+      "defaultCommitCharacters": []
     }
   }
 ]

tests/baselines/reference/completionImportAttributes.baseline

@@ -137,6 +137,11 @@
             }
           ]
         }
+      ],
+      "defaultCommitCharacters": [
+        ".",
+        ",",
+        ";"
       ]
     }
   },
@@ -267,6 +272,11 @@
             }
           ]
         }
+      ],
+      "defaultCommitCharacters": [
+        ".",
+        ",",
+        ";"
       ]
     }
   }

tests/baselines/reference/completionImportCallAssertion.baseline

@@ -137,6 +137,11 @@
             }
           ]
         }
+      ],
+      "defaultCommitCharacters": [
+        ".",
+        ",",
+        ";"
       ]
     }
   },
@@ -267,6 +272,11 @@
             }
           ]
         }
+      ],
+      "defaultCommitCharacters": [
+        ".",
+        ",",
+        ";"
       ]
     }
   }