import { type PixConfig } from "../../config.js";
import type { Theme } from "../../theme.js";
import { type InlineUserMessageMenuContext } from "./conversation-entry-renderer.js";
import type { ConversationBlockCache, Entry, RenderedLine } from "../types.js";
export type ConversationViewportHost = {
    readonly entries: readonly Entry[];
    readonly entryRenderVersions: ReadonlyMap<string, number>;
    readonly cwd: string;
    readonly colors: Theme["colors"];
    readonly pixConfig: PixConfig;
    readonly outputFilters: readonly RegExp[];
    availableThinkingLevels?(): readonly string[] | undefined;
    readonly superCompactTools?: boolean;
    readonly allThinkingExpanded?: boolean;
    hasDynamicConversationBlock?(): boolean;
    isDynamicConversationBlock(entry: Entry): boolean;
    renderInlineUserMessageMenu(entry: Extract<Entry, {
        kind: "user";
    }>, context: InlineUserMessageMenuContext): RenderedLine[];
    renderExtensionEntry?(entry: Extract<Entry, {
        kind: "extension-entry";
    }>, width: number): RenderedLine[];
};
export type ConversationEntryBlockPosition = {
    entry: Entry;
    offset: number;
    lineCount: number;
    block: ConversationBlockCache;
};
export declare class ConversationViewport {
    private readonly host;
    private readonly blockCachesByWidth;
    private readonly layoutCachesByWidth;
    constructor(host: ConversationViewportHost);
    clear(): void;
    deleteEntry(entryId: string): void;
    lineCount(width: number): number;
    slice(width: number, start: number, count: number): RenderedLine[];
    private sliceMeasured;
    entries(): Entry[];
    blockForEntry(entry: Entry, width: number): ConversationBlockCache;
    entryBlockPositions(width: number): ConversationEntryBlockPosition[];
    entryBlockPositionById(width: number, entryId: string): ConversationEntryBlockPosition | undefined;
    measuredLineCountForEntries(width: number, entryIds: readonly string[]): number;
    private layoutForWidth;
    private buildLayout;
    private previousMeasuredLineCount;
    private layoutStructureChanged;
    private syncLayoutStructure;
    private rebuildOffsets;
    private refreshDirtyLayoutEntries;
    private blockCacheForWidth;
    private refreshDynamicLayoutEntries;
    private ensureEntryMeasured;
    private hasDynamicConversationBlock;
    private isDynamicConversationBlock;
    private refreshLayoutEntry;
    private measuredLineCountForEntry;
    private estimatedLineCountForEntry;
    private lineCountWithGap;
    private estimatedBlockLineCountForEntry;
    private estimatedToolEntryLineCount;
    private nextVisibleEntry;
    private nextEstimatedVisibleEntry;
    private gapAfterEntry;
    private isSuperCompactGaplessEntry;
    private entryIndexForOffset;
}