Fix some small type issues

Some parameters are optional, but were marked as required.

Language service methods were marked as bound methods, but they don’t have
to be called as such.

The `Thenable` type from `json-rpc` was used. These were replaced with
the builtin TypeScript type `PromiseLike`.

src/languageserver/handlers/languageHandlers.ts

@@ -229,15 +229,15 @@ export class LanguageHandlers {
     return this.languageService.getCodeAction(textDocument, params);
   }
 
-  codeLensHandler(params: CodeLensParams): Thenable<CodeLens[] | undefined> | CodeLens[] | undefined {
+  codeLensHandler(params: CodeLensParams): PromiseLike<CodeLens[] | undefined> | CodeLens[] | undefined {
     const textDocument = this.yamlSettings.documents.get(params.textDocument.uri);
     if (!textDocument) {
       return;
     }
     return this.languageService.getCodeLens(textDocument);
   }
 
-  codeLensResolveHandler(param: CodeLens): Thenable<CodeLens> | CodeLens {
+  codeLensResolveHandler(param: CodeLens): PromiseLike<CodeLens> | CodeLens {
     return this.languageService.resolveCodeLens(param);
   }
 

src/languageservice/services/yamlCodeLens.ts

@@ -44,7 +44,7 @@ export class YamlCodeLens {
 
     return result;
   }
-  resolveCodeLens(param: CodeLens): Thenable<CodeLens> | CodeLens {
+  resolveCodeLens(param: CodeLens): PromiseLike<CodeLens> | CodeLens {
     return param;
   }
 }

src/languageservice/services/yamlFormatter.ts

@@ -21,7 +21,7 @@ export class YAMLFormatter {
     }
   }
 
-  public format(document: TextDocument, options: FormattingOptions & CustomFormatterOptions): TextEdit[] {
+  public format(document: TextDocument, options: Partial<FormattingOptions> & CustomFormatterOptions = {}): TextEdit[] {
     if (!this.formatterEnabled) {
       return [];
     }

src/languageservice/yamlLanguageService.ts

@@ -157,28 +157,28 @@ export interface CustomFormatterOptions {
 }
 
 export interface LanguageService {
-  configure(settings: LanguageSettings): void;
-  registerCustomSchemaProvider(schemaProvider: CustomSchemaProvider): void;
-  doComplete(document: TextDocument, position: Position, isKubernetes: boolean): Promise<CompletionList>;
-  doValidation(document: TextDocument, isKubernetes: boolean): Promise<Diagnostic[]>;
-  doHover(document: TextDocument, position: Position): Promise<Hover | null>;
-  findDocumentSymbols(document: TextDocument, context: DocumentSymbolsContext): SymbolInformation[];
-  findDocumentSymbols2(document: TextDocument, context: DocumentSymbolsContext): DocumentSymbol[];
-  findLinks(document: TextDocument): Promise<DocumentLink[]>;
-  resetSchema(uri: string): boolean;
-  doFormat(document: TextDocument, options: CustomFormatterOptions): TextEdit[];
-  doDefinition(document: TextDocument, params: DefinitionParams): DefinitionLink[] | undefined;
-  doDocumentOnTypeFormatting(document: TextDocument, params: DocumentOnTypeFormattingParams): TextEdit[] | undefined;
-  addSchema(schemaID: string, schema: JSONSchema): void;
-  deleteSchema(schemaID: string): void;
-  modifySchemaContent(schemaAdditions: SchemaAdditions): void;
-  deleteSchemaContent(schemaDeletions: SchemaDeletions): void;
-  deleteSchemasWhole(schemaDeletions: SchemaDeletionsAll): void;
-  getFoldingRanges(document: TextDocument, context: FoldingRangesContext): FoldingRange[] | null;
-  getSelectionRanges(document: TextDocument, positions: Position[]): SelectionRange[] | undefined;
-  getCodeAction(document: TextDocument, params: CodeActionParams): CodeAction[] | undefined;
-  getCodeLens(document: TextDocument): Thenable<CodeLens[] | undefined> | CodeLens[] | undefined;
-  resolveCodeLens(param: CodeLens): Thenable<CodeLens> | CodeLens;
+  configure: (settings: LanguageSettings) => void;
+  registerCustomSchemaProvider: (schemaProvider: CustomSchemaProvider) => void;
+  doComplete: (document: TextDocument, position: Position, isKubernetes: boolean) => Promise<CompletionList>;
+  doValidation: (document: TextDocument, isKubernetes: boolean) => Promise<Diagnostic[]>;
+  doHover: (document: TextDocument, position: Position) => Promise<Hover | null>;
+  findDocumentSymbols: (document: TextDocument, context?: DocumentSymbolsContext) => SymbolInformation[];
+  findDocumentSymbols2: (document: TextDocument, context?: DocumentSymbolsContext) => DocumentSymbol[];
+  findLinks: (document: TextDocument) => Promise<DocumentLink[]>;
+  resetSchema: (uri: string) => boolean;
+  doFormat: (document: TextDocument, options?: CustomFormatterOptions) => TextEdit[];
+  doDefinition: (document: TextDocument, params: DefinitionParams) => DefinitionLink[] | undefined;
+  doDocumentOnTypeFormatting: (document: TextDocument, params: DocumentOnTypeFormattingParams) => TextEdit[] | undefined;
+  addSchema: (schemaID: string, schema: JSONSchema) => void;
+  deleteSchema: (schemaID: string) => void;
+  modifySchemaContent: (schemaAdditions: SchemaAdditions) => void;
+  deleteSchemaContent: (schemaDeletions: SchemaDeletions) => void;
+  deleteSchemasWhole: (schemaDeletions: SchemaDeletionsAll) => void;
+  getFoldingRanges: (document: TextDocument, context: FoldingRangesContext) => FoldingRange[] | null;
+  getSelectionRanges: (document: TextDocument, positions: Position[]) => SelectionRange[] | undefined;
+  getCodeAction: (document: TextDocument, params: CodeActionParams) => CodeAction[] | undefined;
+  getCodeLens: (document: TextDocument) => PromiseLike<CodeLens[] | undefined> | CodeLens[] | undefined;
+  resolveCodeLens: (param: CodeLens) => PromiseLike<CodeLens> | CodeLens;
 }
 
 export function getLanguageService(params: {

src/yamlSettings.ts

@@ -60,7 +60,7 @@ export interface JSONSchemaSettings {
 export class SettingsState {
   yamlConfigurationSettings: JSONSchemaSettings[] = undefined;
   schemaAssociations: ISchemaAssociations | SchemaConfiguration[] | undefined = undefined;
-  formatterRegistration: Thenable<Disposable> = null;
+  formatterRegistration: PromiseLike<Disposable> = null;
   specificValidatorPaths = [];
   schemaConfigurationSettings = [];
   yamlShouldValidate = true;