monaco-editor-core
Version:
A browser based code editor
50 lines (49 loc) • 2.77 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { AsyncIterableObject } from '../../../../base/common/async.js';
import { CancellationToken } from '../../../../base/common/cancellation.js';
import { onUnexpectedExternalError } from '../../../../base/common/errors.js';
import { registerModelAndPositionCommand } from '../../../browser/editorExtensions.js';
import { ILanguageFeaturesService } from '../../../common/services/languageFeatures.js';
export class HoverProviderResult {
constructor(provider, hover, ordinal) {
this.provider = provider;
this.hover = hover;
this.ordinal = ordinal;
}
}
/**
* Does not throw or return a rejected promise (returns undefined instead).
*/
async function executeProvider(provider, ordinal, model, position, token) {
const result = await Promise
.resolve(provider.provideHover(model, position, token))
.catch(onUnexpectedExternalError);
if (!result || !isValid(result)) {
return undefined;
}
return new HoverProviderResult(provider, result, ordinal);
}
export function getHoverProviderResultsAsAsyncIterable(registry, model, position, token, recursive = false) {
const providers = registry.ordered(model, recursive);
const promises = providers.map((provider, index) => executeProvider(provider, index, model, position, token));
return AsyncIterableObject.fromPromises(promises).coalesce();
}
export function getHoversPromise(registry, model, position, token, recursive = false) {
return getHoverProviderResultsAsAsyncIterable(registry, model, position, token, recursive).map(item => item.hover).toPromise();
}
registerModelAndPositionCommand('_executeHoverProvider', (accessor, model, position) => {
const languageFeaturesService = accessor.get(ILanguageFeaturesService);
return getHoversPromise(languageFeaturesService.hoverProvider, model, position, CancellationToken.None);
});
registerModelAndPositionCommand('_executeHoverProvider_recursive', (accessor, model, position) => {
const languageFeaturesService = accessor.get(ILanguageFeaturesService);
return getHoversPromise(languageFeaturesService.hoverProvider, model, position, CancellationToken.None, true);
});
function isValid(result) {
const hasRange = (typeof result.range !== 'undefined');
const hasHtmlContent = typeof result.contents !== 'undefined' && result.contents && result.contents.length > 0;
return hasRange && hasHtmlContent;
}