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foldingRange.ts
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foldingRange.ts
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/* --------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
* ------------------------------------------------------------------------------------------ */
import {
languages as Languages, Disposable, TextDocument, ProviderResult, FoldingRange as VFoldingRange, FoldingContext, FoldingRangeProvider, EventEmitter
} from 'vscode';
import {
ClientCapabilities, CancellationToken, ServerCapabilities, DocumentSelector, FoldingRangeRequest, FoldingRangeParams,
FoldingRangeRegistrationOptions, FoldingRangeOptions, FoldingRangeKind, FoldingRangeRefreshRequest
} from 'vscode-languageserver-protocol';
import { TextDocumentLanguageFeature, FeatureClient, ensure } from './features';
export interface ProvideFoldingRangeSignature {
(this: void, document: TextDocument, context: FoldingContext, token: CancellationToken): ProviderResult<VFoldingRange[]>;
}
export interface FoldingRangeProviderMiddleware {
provideFoldingRanges?: (this: void, document: TextDocument, context: FoldingContext, token: CancellationToken, next: ProvideFoldingRangeSignature) => ProviderResult<VFoldingRange[]>;
}
export type FoldingRangeProviderShape = {
provider: FoldingRangeProvider;
onDidChangeFoldingRange: EventEmitter<void>;
};
export class FoldingRangeFeature extends TextDocumentLanguageFeature<boolean | FoldingRangeOptions, FoldingRangeRegistrationOptions, FoldingRangeProviderShape, FoldingRangeProviderMiddleware> {
constructor(client: FeatureClient<FoldingRangeProviderMiddleware>) {
super(client, FoldingRangeRequest.type);
}
public fillClientCapabilities(capabilities: ClientCapabilities): void {
const capability = ensure(ensure(capabilities, 'textDocument')!, 'foldingRange')!;
capability.dynamicRegistration = true;
capability.rangeLimit = 5000;
capability.lineFoldingOnly = true;
capability.foldingRangeKind = { valueSet: [ FoldingRangeKind.Comment, FoldingRangeKind.Imports, FoldingRangeKind.Region ] };
capability.foldingRange = { collapsedText: false };
ensure(ensure(capabilities, 'workspace')!, 'foldingRange')!.refreshSupport = true;
}
public initialize(capabilities: ServerCapabilities, documentSelector: DocumentSelector): void {
this._client.onRequest(FoldingRangeRefreshRequest.type, async () => {
for (const provider of this.getAllProviders()) {
provider.onDidChangeFoldingRange.fire();
}
});
const [id, options] = this.getRegistration(documentSelector, capabilities.foldingRangeProvider);
if (!id || !options) {
return;
}
this.register({ id: id, registerOptions: options });
}
protected registerLanguageProvider(options: FoldingRangeRegistrationOptions): [Disposable, FoldingRangeProviderShape] {
const selector = options.documentSelector!;
const eventEmitter: EventEmitter<void> = new EventEmitter<void>();
const provider: FoldingRangeProvider = {
onDidChangeFoldingRanges: eventEmitter.event,
provideFoldingRanges: (document, context, token) => {
const client = this._client;
const provideFoldingRanges: ProvideFoldingRangeSignature = (document, _, token) => {
const requestParams: FoldingRangeParams = {
textDocument: client.code2ProtocolConverter.asTextDocumentIdentifier(document)
};
return client.sendRequest(FoldingRangeRequest.type, requestParams, token).then((result) => {
if (token.isCancellationRequested) {
return null;
}
return client.protocol2CodeConverter.asFoldingRanges(result, token);
}, (error: any) => {
return client.handleFailedRequest(FoldingRangeRequest.type, token, error, null);
});
};
const middleware = client.middleware;
return middleware.provideFoldingRanges
? middleware.provideFoldingRanges(document, context, token, provideFoldingRanges)
: provideFoldingRanges(document, context, token);
}
};
return [Languages.registerFoldingRangeProvider(this._client.protocol2CodeConverter.asDocumentSelector(selector), provider), { provider: provider, onDidChangeFoldingRange: eventEmitter }];
}
}