Fixes #42649

src/vs/editor/common/modes/languageConfigurationRegistry.ts

@@ -274,6 +274,15 @@ export class LanguageConfigurationRegistryImpl {
 		return ensureValidWordDefinition(value.wordDefinition || null);
 	}
 
+	public getWordDefinitions(): [LanguageId, RegExp][] {
+		const languages = this._entries.keys();
+		let result: [LanguageId, RegExp][] = [];
+		for (const language of languages) {
+			result.push([language, this._entries.get(language)!.wordDefinition]);
+		}
+		return result;
+	}
+
 	public getFoldingRules(languageId: LanguageId): FoldingRules {
 		let value = this._getRichEditSupport(languageId);
 		if (!value) {

src/vs/workbench/api/browser/mainThreadLanguageFeatures.ts

@@ -11,7 +11,7 @@ import * as search from 'vs/workbench/contrib/search/common/search';
 import { CancellationToken } from 'vs/base/common/cancellation';
 import { Position as EditorPosition } from 'vs/editor/common/core/position';
 import { Range as EditorRange, IRange } from 'vs/editor/common/core/range';
-import { ExtHostContext, MainThreadLanguageFeaturesShape, ExtHostLanguageFeaturesShape, MainContext, IExtHostContext, ILanguageConfigurationDto, IRegExpDto, IIndentationRuleDto, IOnEnterRuleDto, ILocationDto, IWorkspaceSymbolDto, reviveWorkspaceEditDto, IDocumentFilterDto, IDefinitionLinkDto, ISignatureHelpProviderMetadataDto, ILinkDto, ICallHierarchyItemDto, ISuggestDataDto, ICodeActionDto, ISuggestDataDtoField, ISuggestResultDtoField, ICodeActionProviderMetadataDto } from '../common/extHost.protocol';
+import { ExtHostContext, MainThreadLanguageFeaturesShape, ExtHostLanguageFeaturesShape, MainContext, IExtHostContext, ILanguageConfigurationDto, IRegExpDto, IIndentationRuleDto, IOnEnterRuleDto, ILocationDto, IWorkspaceSymbolDto, reviveWorkspaceEditDto, IDocumentFilterDto, IDefinitionLinkDto, ISignatureHelpProviderMetadataDto, ILinkDto, ICallHierarchyItemDto, ISuggestDataDto, ICodeActionDto, ISuggestDataDtoField, ISuggestResultDtoField, ICodeActionProviderMetadataDto, ILanguageWordDefinitionDto } from '../common/extHost.protocol';
 import { LanguageConfigurationRegistry } from 'vs/editor/common/modes/languageConfigurationRegistry';
 import { LanguageConfiguration, IndentationRule, OnEnterRule } from 'vs/editor/common/modes/languageConfiguration';
 import { IModeService } from 'vs/editor/common/services/modeService';
@@ -36,6 +36,32 @@ export class MainThreadLanguageFeatures implements MainThreadLanguageFeaturesSha
 	) {
 		this._proxy = extHostContext.getProxy(ExtHostContext.ExtHostLanguageFeatures);
 		this._modeService = modeService;
+
+		const updateAllWordDefinitions = () => {
+			const langWordPairs = LanguageConfigurationRegistry.getWordDefinitions();
+			let wordDefinitionDtos: ILanguageWordDefinitionDto[] = [];
+			for (const [languageId, wordDefinition] of langWordPairs) {
+				const language = this._modeService.getLanguageIdentifier(languageId);
+				if (!language) {
+					continue;
+				}
+				wordDefinitionDtos.push({
+					languageId: language.language,
+					regexSource: wordDefinition.source,
+					regexFlags: wordDefinition.flags
+				});
+			}
+			this._proxy.$setWordDefinitions(wordDefinitionDtos);
+		};
+		LanguageConfigurationRegistry.onDidChange((e) => {
+			const wordDefinition = LanguageConfigurationRegistry.getWordDefinition(e.languageIdentifier.id);
+			this._proxy.$setWordDefinitions([{
+				languageId: e.languageIdentifier.language,
+				regexSource: wordDefinition.source,
+				regexFlags: wordDefinition.flags
+			}]);
+		});
+		updateAllWordDefinitions();
 	}
 
 	dispose(): void {

src/vs/workbench/api/common/extHost.protocol.ts

@@ -1197,6 +1197,12 @@ export interface IOutgoingCallDto {
 	to: ICallHierarchyItemDto;
 }
 
+export interface ILanguageWordDefinitionDto {
+	languageId: string;
+	regexSource: string;
+	regexFlags: string
+}
+
 export interface ExtHostLanguageFeaturesShape {
 	$provideDocumentSymbols(handle: number, resource: UriComponents, token: CancellationToken): Promise<modes.DocumentSymbol[] | undefined>;
 	$provideCodeLenses(handle: number, resource: UriComponents, token: CancellationToken): Promise<ICodeLensListDto | undefined>;
@@ -1239,6 +1245,7 @@ export interface ExtHostLanguageFeaturesShape {
 	$provideCallHierarchyIncomingCalls(handle: number, sessionId: string, itemId: string, token: CancellationToken): Promise<IIncomingCallDto[] | undefined>;
 	$provideCallHierarchyOutgoingCalls(handle: number, sessionId: string, itemId: string, token: CancellationToken): Promise<IOutgoingCallDto[] | undefined>;
 	$releaseCallHierarchy(handle: number, sessionId: string): void;
+	$setWordDefinitions(wordDefinitions: ILanguageWordDefinitionDto[]): void;
 }
 
 export interface ExtHostQuickOpenShape {

src/vs/workbench/api/common/extHostLanguageFeatures.ts

@@ -1916,4 +1916,10 @@ export class ExtHostLanguageFeatures implements extHostProtocol.ExtHostLanguageF
 		this._proxy.$setLanguageConfiguration(handle, languageId, serializedConfiguration);
 		return this._createDisposable(handle);
 	}
+
+	$setWordDefinitions(wordDefinitions: extHostProtocol.ILanguageWordDefinitionDto[]): void {
+		for (const wordDefinition of wordDefinitions) {
+			this._documents.setWordDefinitionFor(wordDefinition.languageId, new RegExp(wordDefinition.regexSource, wordDefinition.regexFlags));
+		}
+	}
 }