import * as React from '@theia/core/shared/react';
import { ReactWidget } from '@theia/core/lib/browser/widgets/react-widget';
import { LabelProvider } from '@theia/core/lib/browser/label-provider';
import { HoverService } from '@theia/core/lib/browser/hover-service';
import { MarkdownRenderer, MarkdownRendererFactory } from '@theia/core/lib/browser/markdown-rendering/markdown-renderer';
import { ScmHistoryGraphModel, HistoryGraphEntry } from './scm-history-graph-model';
import { ScmHistoryItemRef, ScmHistoryItemChange } from './scm-provider';
import { ScmService } from './scm-service';
import { GraphRow } from './scm-history-graph-lanes';
import { CancellationTokenSource } from '@theia/core/lib/common/cancellation';
import { MenuPath } from '@theia/core/lib/common/menu/menu-types';
import { ContextMenuRenderer } from '@theia/core/lib/browser/context-menu-renderer';
import { OpenerService } from '@theia/core/lib/browser/opener-service';
import { ScmContextKeyService } from './scm-context-key-service';
/** Menu path matching the VS Code 'scm/history/title' contribution point (graph section toolbar). */
export declare const SCM_HISTORY_TITLE_MENU: MenuPath;
/** Menu path matching the VS Code 'scm/historyItem/context' contribution point (commit row context menu). */
export declare const SCM_HISTORY_ITEM_CONTEXT_MENU: MenuPath;
/** Menu path matching the VS Code 'scm/historyItemRef/context' contribution point (ref badge context menu). */
export declare const SCM_HISTORY_ITEM_REF_CONTEXT_MENU: MenuPath;
export declare class ScmHistoryGraphWidget extends ReactWidget {
    static readonly ID = "scm-history-graph-widget";
    static readonly LABEL: string;
    protected readonly model: ScmHistoryGraphModel;
    protected readonly hoverService: HoverService;
    protected readonly markdownRendererFactory: MarkdownRendererFactory;
    protected readonly scmService: ScmService;
    protected readonly labelProvider: LabelProvider;
    protected readonly contextMenuRenderer: ContextMenuRenderer;
    protected readonly openerService: OpenerService;
    protected readonly scmContextKeys: ScmContextKeyService;
    protected selectedIndex: number;
    /** Currently selected change row key (`${itemId}-${ci}`), or undefined. */
    protected selectedChangeKey: string | undefined;
    /** Map from commit id → loaded changes (undefined = not loaded yet). */
    protected expandedChanges: Map<string, ScmHistoryItemChange[] | "loading">;
    /** Set of commit ids that are currently expanded. */
    protected expandedIds: Set<string>;
    /** Map from commit id → in-flight CancellationTokenSource for loadChanges. */
    protected loadChangesCts: Map<string, CancellationTokenSource>;
    constructor();
    protected init(): void;
    protected updateContextKeys(): void;
    protected render(): React.ReactNode;
    protected handleEndReached: () => void;
    protected renderRow(entry: HistoryGraphEntry, idx: number, svgWidth: number): React.ReactElement;
    protected _markdownRenderer: MarkdownRenderer | undefined;
    protected get markdownRenderer(): MarkdownRenderer;
    protected handleRowMouseEnter: (e: React.MouseEvent<HTMLDivElement>, entry: HistoryGraphEntry) => void;
    protected renderChangesRows(itemId: string, svgWidth: number, graphRow: GraphRow, changes: ScmHistoryItemChange[] | 'loading' | undefined): React.ReactElement;
    protected renderChangeRow(change: ScmHistoryItemChange, ci: number, itemId: string, svgWidth: number, graphRow: GraphRow): React.ReactElement;
    protected handleChangeClick: (e: React.MouseEvent, change: ScmHistoryItemChange, changeKey: string) => void;
    protected openChange(change: ScmHistoryItemChange): void;
    protected renderChangeRowSvg(graphRow: GraphRow, svgWidth: number): React.ReactElement;
    /**
     * Renders the SVG graph column for a commit row, matching VS Code's SVG structure:
     *
     * - Each lane is 22px wide; circle cx = lane * 22 + 11, cy = 11
     * - Pass-through lanes: full vertical line M x 0 V 22
     * - Commit lane: top segment (M commitX 0 V 11) + bottom segment (M commitX 11 V 22)
     * - HEAD/current commit (first entry): r=7 with inner dot, NO top segment
     * - Normal commit: r=5
     * - Branch-out edge: diagonal S-curve bezier from commit position (commitX, cy)
     *   sweeping down to the new lane at the bottom: M commitX cy C commitX 22 newX cy newX 22
     * - Merge-in edge: bezier from the source lane at the top curving into
     *   the commit position: M srcX 0 C srcX cy commitX cy commitX cy
     */
    protected renderGraphSvg(row: GraphRow, svgWidth: number, isHead: boolean): React.ReactElement;
    protected renderRefBadges(refs?: readonly ScmHistoryItemRef[], entry?: HistoryGraphEntry): React.ReactNode;
    protected handleRowContextMenu: (e: React.MouseEvent, entry: HistoryGraphEntry) => void;
    protected handleRefBadgeContextMenu: (e: React.MouseEvent, entry: HistoryGraphEntry, ref: ScmHistoryItemRef) => void;
    protected handleRowClick: (idx: number, entry: HistoryGraphEntry) => void;
    protected loadChanges(entry: HistoryGraphEntry): Promise<void>;
    protected handleLoadMore: () => void;
    protected handleLoadMoreKey: (e: React.KeyboardEvent) => void;
}
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