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/*---------------------------------------------------------------------------------------------
chatViewModel.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 { Codicon } from '../../../../../base/common/codicons.js';
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import { Emitter, Event } from '../../../../../base/common/event.js';
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import { IMarkdownString } from '../../../../../base/common/htmlContent.js';
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import { Disposable, dispose } from '../../../../../base/common/lifecycle.js';
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import { RunOnceScheduler } from '../../../../../base/common/async.js';
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import { IObservable } from '../../../../../base/common/observable.js';
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import { ThemeIcon } from '../../../../../base/common/themables.js';
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import { URI } from '../../../../../base/common/uri.js';
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import { IInstantiationService } from '../../../../../platform/instantiation/common/instantiation.js';
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import { IChatRequestVariableEntry } from '../attachments/chatVariableEntries.js';
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import { ChatAgentVoteDirection, ChatRequestQueueKind, IChatCodeCitation, IChatContentReference, IChatDisabledClaudeHooksPart, IChatFollowup, IChatMcpAuthenticationRequired, IChatMcpServersStarting, IChatMcpServersStartingSlow, IChatPlanReview, IChatProgressMessage, IChatQuestionCarousel, IChatResponseErrorDetails, IChatTask, IChatUsage, IChatUsedContext } from '../chatService/chatService.js';
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import { getFullyQualifiedId, IChatAgentCommand, IChatAgentData, IChatAgentNameService, IChatAgentResult } from '../participants/chatAgents.js';
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import { IParsedChatRequest } from '../requestParser/chatParserTypes.js';
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import { IChatModel, IChatProgressRenderableResponseContent, IChatRequestDisablement, IChatRequestModel, IChatResponseModel, IChatTextEditGroup, IResponse } from './chatModel.js';
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import { ChatStreamStatsTracker, IChatStreamStats } from './chatStreamStats.js';
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import { countWords } from './chatWordCounter.js';
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export function isRequestVM(item: unknown): item is IChatRequestViewModel {
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return !!item && typeof item === 'object' && 'message' in item;
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}
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export function isResponseVM(item: unknown): item is IChatResponseViewModel {
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return !!item && typeof (item as IChatResponseViewModel).setVote !== 'undefined';
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}
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export function isPendingDividerVM(item: unknown): item is IChatPendingDividerViewModel {
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return !!item && typeof item === 'object' && (item as IChatPendingDividerViewModel).kind === 'pendingDivider';
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}
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interface IChatViewModelItemWithPendingState {
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readonly id: string;
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readonly kind?: string;
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readonly pendingKind?: ChatRequestQueueKind;
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}
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function isPendingChatViewModelItem(item: IChatViewModelItemWithPendingState): boolean {
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return item.kind === 'pendingDivider' || item.pendingKind !== undefined;
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}
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/**
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* The active response that content streams into: the last non-pending item, ignoring
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* trailing queued/steering rows (and their dividers). Falls back to the last item when
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* everything is pending.
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*/
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export function getStickyScrollTargetItem<T extends IChatViewModelItemWithPendingState>(items: readonly T[]): T | undefined {
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for (let i = items.length - 1; i >= 0; i--) {
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const item = items[i];