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/*---------------------------------------------------------------------------------------------
agentHostFileCompletionProvider.ts
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { CancellationToken } from '../../../base/common/cancellation.js';
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import { isCancellationError } from '../../../base/common/errors.js';
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import { compareItemsByFuzzyScore, FuzzyScorerCache, IItemAccessor, prepareQuery, scoreItemFuzzy } from '../../../base/common/fuzzyScorer.js';
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import { Schemas } from '../../../base/common/network.js';
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import { basename, relativePath } from '../../../base/common/resources.js';
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import { URI } from '../../../base/common/uri.js';
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import { CompletionItem, CompletionItemKind, CompletionsParams } from '../common/state/protocol/commands.js';
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import { MessageAttachmentKind } from '../common/state/protocol/state.js';
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import { CompletionTriggerCharacter, IAgentHostCompletionItemProvider } from './agentHostCompletions.js';
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import { AgentHostStateManager } from './agentHostStateManager.js';
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import { AgentHostWorkspaceFiles } from './agentHostWorkspaceFiles.js';
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/** Maximum number of completion items returned per call. */
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const MAX_RESULTS = 50;
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/**
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* Result of {@link extractAtToken}.
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*/
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interface IAtToken {
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readonly token: string;
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readonly triggerChar: string;
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readonly rangeStart: number;
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readonly rangeEnd: number;
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}
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/**
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* Walk back from `offset` to find the most recent `@` that is preceded by
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* whitespace (or start-of-string) and not interrupted by whitespace. Returns
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* the substring after `@` together with the range to replace, or `undefined`
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* if no `@`-token is being typed at `offset`.
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*
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* Exported for unit testing.
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*/
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export function extractAtToken(text: string, offset: number): IAtToken | undefined {
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if (offset < 0 || offset > text.length) {
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return undefined;