/**
 * Mouse hit-testing for the full-mouse-mode TUI layout.
 *
 * Ink exposes no absolute terminal coordinates, but the mouse-mode layout is
 * deterministic top-down: the chat history occupies the first `viewportRows`
 * rows of the terminal (its managed scrollbar is the last column of that band),
 * and everything below it (rows viewportRows+1 .. termRows) is the bottom region
 * — input, pickers, confirm prompt, status bar, panels. That is enough to map a
 * 1-based SGR mouse report (x,y) onto a coarse region without any DOM measuring.
 *
 * Finer resolution inside the bottom region (which status-bar line, which
 * confirm button) is layered on top by the consumers using their own measured
 * offsets + the co-located column-span helpers; this primitive only owns the
 * top-level row/column geometry so it stays pure and unit-testable.
 */
/** Mouse-mode layout geometry. All values are 1-based to match SGR reports. */
export interface MouseLayout {
    /** Live terminal row count. */
    termRows: number;
    /** Live terminal column count. */
    termCols: number;
    /** Rows the history viewport occupies, from the top of the screen. */
    viewportRows: number;
}
export type HitRegion = 
/** The copy/scroll rail; `cell` is the 0-based row on the track. */
{
    kind: 'scrollbar';
    cell: number;
}
/** Inside the history viewport; `row` is 0-based from the viewport top. */
 | {
    kind: 'history';
    row: number;
}
/** Below the history viewport; `row` is 0-based from the bottom-region top. */
 | {
    kind: 'bottom';
    row: number;
};
/**
 * Columns at the right edge of the history viewport reserved for the copy/scroll
 * rail. Copy icons use the first column, a blank gap separates them from the
 * scrollbar track in the last column.
 */
export declare const SCROLLBAR_HIT_WIDTH = 3;
/** Rows available to managed history after reserving the measured bottom UI. */
export declare function historyViewportRows(termRows: number, bottomHeight: number): number;
/**
 * Map a 1-based terminal (x,y) onto a layout region, or null when the point is
 * outside the terminal. Pure — no side effects, no DOM access.
 */
export declare function hitRegion(layout: MouseLayout, x: number, y: number): HitRegion | null;
/** True when a wheel event belongs to the managed history viewport. */
export declare function isHistoryScrollTarget(layout: MouseLayout, x: number, y: number): boolean;
/**
 * 1-based absolute terminal row of a status-bar content line.
 *
 * The status bar is bottom-anchored above whatever panels render below it, so
 * its band starts at `termRows - belowHeight - statusBarHeight + 1`. Its first
 * `headerRows` rows are non-content (the single top border), so content line
 * `line` (0-based: line 1 = 0) sits `headerRows + line` rows into the band.
 *
 * `statusBarHeight` and `belowHeight` are live `measureElement` heights of the
 * status-bar wrapper and the below-status-bar panel region. Returns null when
 * the requested content line doesn't exist in the measured band.
 */
export declare function statusBarLineRow(opts: {
    termRows: number;
    /** Measured status-bar height, including its top border row. */
    statusBarHeight: number;
    /** Measured height of everything rendered below the status bar (0 if none). */
    belowHeight: number;
    /** Non-content rows at the top of the status bar (the border). */
    headerRows: number;
    /** 0-based content line index (line 1 = 0, line 2 = 1, …). */
    line: number;
}): number | null;
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