/**
 * CellBuffer is the 2D matrix that represents the terminal screen.
 * This is the core data structure for our diffing approach.
 */
import { type Cell, type Style } from "./cell.js";
export declare class CellBuffer {
    readonly width: number;
    readonly height: number;
    private cells;
    constructor(width: number, height: number);
    private index;
    private inBounds;
    get(x: number, y: number): Cell;
    set(x: number, y: number, cell: Cell): void;
    setChar(x: number, y: number, char: string, style?: Style): void;
    /**
     * Set a character, merging style with existing cell's style.
     * This preserves background if the new style doesn't specify one.
     */
    setCharMerge(x: number, y: number, char: string, style?: Style): void;
    /**
     * Write a string starting at (x, y), going right.
     * Text is clipped at buffer edge.
     */
    writeString(x: number, y: number, text: string, style?: Style): number;
    /**
     * Write a string, merging style with existing cells.
     * Text is clipped at buffer edge.
     */
    writeStringMerge(x: number, y: number, text: string, style?: Style): number;
    /**
     * Fill a rectangular region with a cell.
     */
    fillRect(x: number, y: number, width: number, height: number, cell: Cell): void;
    /**
     * Clear the entire buffer.
     */
    clear(): void;
    /**
     * Copy contents from another buffer into this one at position (destX, destY).
     */
    blit(source: CellBuffer, destX: number, destY: number): void;
    /**
     * Create a clone of this buffer.
     */
    clone(): CellBuffer;
    /**
     * Check if this buffer equals another.
     */
    equals(other: CellBuffer): boolean;
    /**
     * Get a debug string representation.
     */
    toDebugString(): string;
}
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