fix #5017: detect languages on mime associations change

Signed-off-by: Anton Kosyakov <anton.kosyakov@typefox.io>
eclipse-theia · May 14, 2020 · 55af692 · 55af692
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diff --git a/packages/monaco/src/browser/monaco-mime-service.ts b/packages/monaco/src/browser/monaco-mime-service.ts
@@ -27,6 +27,8 @@ export class MonacoMimeService extends MimeService {
             const mimetype = this.getMimeForMode(association.id) || `text/x-${association.id}`;
             monaco.mime.registerTextMime({ id: association.id, mime: mimetype, filepattern: association.filepattern, userConfigured: true }, false);
         }
+
+        monaco.services.StaticServices.modeService.get()._onLanguagesMaybeChanged.fire(undefined);
     }
 
     protected getMimeForMode(langId: string): string | undefined {

diff --git a/packages/monaco/src/typings/monaco/index.d.ts b/packages/monaco/src/typings/monaco/index.d.ts
@@ -666,6 +666,7 @@ declare module monaco.services {
     export interface IModeService {
         // https://github.com/theia-ide/vscode/blob/standalone/0.19.x/src/vs/editor/common/services/modeServiceImpl.ts#L46
         private readonly _instantiatedModes: { [modeId: string]: IMode; };
+        private readonly _onLanguagesMaybeChanged: Emitter<void>;
         readonly onDidCreateMode: monaco.IEvent<IMode>;
         createByFilepathOrFirstLine(rsource: monaco.Uri | null, firstLine?: string): ILanguageSelection;
         getLanguageIdentifier(modeId: string | LanguageId): LanguageIdentifier | null;