export interface Rect {
    readonly top: number;
    readonly bottom: number;
}
export interface Band {
    readonly top: number;
    readonly bottom: number;
}
export declare const BAND_MARGIN = 28;
export declare function bandOf(chromeBottom: number | null, viewport: Rect): Band;
export declare function bandFix(caret: Rect, band: Band, limit: number): number;
export declare function revealFix(caret: Rect, band: Band, limit: number): number;
export declare const REVEAL_STEPS = 3;
export declare function revealWalk(steps: number, look: () => {
    readonly caret: Rect;
    readonly band: Band;
    readonly limit: number;
} | null, push: (delta: number) => number): number;
export declare function underWalk(steps: number, look: () => {
    readonly caret: Rect;
    readonly band: Band;
    readonly limit: number;
} | null, push: (delta: number) => number): number;
export declare function placeWalk(steps: number, look: () => {
    readonly caret: Rect;
    readonly band: Band;
    readonly limit: number;
} | null, push: (delta: number) => number): number;
export declare const KEYBOARD_STEPS = 5;
export declare function isIos(agent: string, platform: string, maxTouchPoints: number): boolean;
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