/**
 * Represents a single character cell in the terminal with its properties
 *
 * @since 1.0.0
 */
export interface CellInterface {
    /**
     * The character to display in this cell
     * @since 1.0.0
     */
    char: string;
    /**
     * Indicates whether this cell has been modified and needs redrawing
     * @since 1.0.0
     */
    dirty: boolean;
}
/**
 * Context information passed during the rendering process
 *
 * @remarks
 * This interface encapsulates all the relevant information needed during
 * the rendering of a single line. It's used internally by the render method
 * to track the rendering state and accumulate output.
 *
 *
 * @since 1.0.0
 */
export interface RenderContext {
    /**
     * Whether to force redrawing of all cells regardless of dirty state
     * @since 1.0.0
     */
    force: boolean;
    /**
     * Accumulated output string to be written to the terminal
     * @since 1.0.0
     */
    output: string;
    /**
     * The current line in the view buffer being processed
     * @since 1.0.0
     */
    viewLine: Array<string>;
    /**
     * The screen row number currently being rendered
     * @since 1.0.0
     */
    screenRow: number;
    /**
     * The content line being rendered to the screen
     *
     * @see CellInterface
     * @since 1.0.0
     */
    contentLine: Array<CellInterface>;
}
/**
 * Writes raw data directly to the standard output stream without any processing
 *
 * @param data - The string or Buffer to write to stdout
 *
 * @returns Nothing
 *
 * @example
 * ```ts
 * // Write an ANSI escape sequence followed by text
 * writeRaw('\x1b[31mThis text is red\x1b[0m');
 * ```
 *
 * @since 1.0.0
 */
export declare function writeRaw(data: string | Buffer): void;
/**
 * Generates an ANSI escape sequence to move the terminal cursor to the specified position
 *
 * @param row - The row (line) number to move the cursor to (1-based index)
 * @param column - The column position to move the cursor to (1-based index)
 *
 * @returns ANSI escape sequence string that moves the cursor when written to the terminal
 *
 * @example
 * ```ts
 * // Move cursor to the beginning of line 5
 * const escapeSequence = moveCursor(5, 1);
 * process.stdout.write(escapeSequence);
 * ```
 *
 * @since 1.0.0
 */
export declare function moveCursor(row: number, column?: number): string;
/**
 * Removes ANSI escape sequences from a string
 *
 * @param str - The input string containing ANSI escape sequences
 * @returns A plain string with all ANSI escape sequences removed
 *
 * @remarks
 * This function uses a regular expression to match and remove ANSI escape sequences
 * that control text styling in terminal output. These sequences typically start with
 * the escape character (x1b) followed by square brackets and control codes.
 *
 * The function is useful for:
 * - Getting accurate string length measurements without styling codes
 * - Preparing terminal output for non-terminal destinations (files, logs)
 * - Normalizing text for comparison or processing
 *
 * @example
 * ```ts
 * import { xterm, stripAnsi } from '@remotex-labs/xansi';
 *
 * const coloredText = xterm.red('Error!');
 * console.log(stripAnsi(coloredText)); // "Error!" (without ANSI codes)
 * ```
 *
 * @since 1.0.0
 */
export declare function stripAnsi(str: string): string;
/**
 * Contains ANSI escape sequence constants for terminal control operations
 *
 * @remarks
 * These ANSI escape codes are used to control terminal output behavior such as
 * cursor movement, screen clearing, and visibility. The enum provides a type-safe
 * way to access these constants without having to remember the raw escape sequences.
 *
 * Each constant is an escape sequence that can be written directly to the terminal
 * to achieve the described effect.
 *
 * @see ShadowRenderer
 * @see https://en.wikipedia.org/wiki/ANSI_escape_code
 *
 * @since 1.0.0
 */
export declare const ANSI: {
    /**
     * Clears from the cursor to the end of the line
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly CLEAR_LINE: "\u001B[K";
    /**
     * Hides the cursor
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly HIDE_CURSOR: "\u001B[?25l";
    /**
     * Shows the cursor
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly SHOW_CURSOR: "\u001B[?25h";
    /**
     * Saves the current cursor position
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly SAVE_CURSOR: "\u001B[s";
    /**
     * Clears the entire screen and moves the cursor to home position (top-left)
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly CLEAR_SCREEN: "\u001B[2J\u001B[H";
    /**
     * Restores the cursor to the previously saved position
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly RESTORE_CURSOR: "\u001B[u";
    /**
     * Clears the screen from the cursor position down
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
     * @since 1.0.0
     */
    readonly CLEAR_SCREEN_DOWN: "\u001B[J";
    /**
     * Resets the terminal to its initial state (RIS - Reset to Initial State).
     * Clears screen, scrollback buffer, and most settings.
     * This is a "hard reset" escape code.
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#Reset_(RIS)
     * @since 1.0.0
     */
    readonly RESET_TERMINAL: "\u001Bc";
};
/**
 * Processes ANSI escape codes and updates the active styles map
 *
 * @param code - The ANSI code to process
 * @param index - Current index in the codes array
 * @param codes - Array of all ANSI codes in the sequence
 * @param active - Map of active styles to be updated
 * @returns The new index position after processing
 *
 * @throws InvalidCodeError - When an unsupported ANSI code is encountered
 *
 * @example
 * ```ts
 * const active = new Map<string, string>();
 * const codes = ['1', '31'];
 * const newIndex = processAnsiCode('1', 0, codes, active);
 * ```
 *
 * @since 1.0.0
 */
export declare function processAnsiCode(code: string, index: number, codes: Array<string>, active: Map<string, string>): number;
/**
 * Splits an ANSI-styled string into individual characters, each wrapped with current active ANSI codes and their resets
 *
 * @param str - The ANSI-styled string to process
 * @returns An array of strings where each element is a character with its complete ANSI styling context
 *
 * @throws Error - If the ANSI sequence contains invalid codes
 *
 * @remarks
 * This function maintains the styling context for each character by tracking active ANSI codes
 * as it processes the input string. It reconstructs each visible character with its full styling
 * information, ensuring that each character in the returned array has the proper ANSI codes
 * prefixed and the corresponding reset codes suffixed.
 *
 * The function handles:
 * - Plain text characters
 * - ANSI escape sequences for styling
 * - Multiple active styles simultaneously
 *
 * @example
 * ```ts
 * // Split a string with bold and colored text
 * const input = "\x1b[1m\x1b[31mBold Red\x1b[0m";
 * const chars = splitWithAnsiContext(input);
 * // Result: Each character will be individually styled with bold and red
 * // e.g., ["\x1b[1m\x1b[31mB\x1b[22m\x1b[39m", "\x1b[1m\x1b[31mo\x1b[22m\x1b[39m", ...]
 * ```
 *
 * @see processAnsiCode - For details on how individual ANSI codes are processed
 * @since 1.0.0
 */
export declare function splitWithAnsiContext(str: string): Array<string>;
/**
 * A virtual terminal renderer that manages efficient screen updates
 *
 * ShadowRenderer provides a mechanism to render content to the terminal
 * while minimizing the number of draw operations needed. It does this by
 * maintaining an internal representation of both the desired content and
 * the current terminal state, only updating parts of the screen that have
 * changed between render cycles.
 *
 * @remarks
 * The renderer maintains separate buffers for content (what should be displayed)
 * and view (what is currently displayed). During rendering, it performs a diff
 * between these buffers to determine the minimal set of changes needed to update
 * the terminal display.
 *
 * This class supports:
 * - Partial screen updates for performance
 * - Content scrolling
 * - Variable viewport dimensions
 * - Rich text styling through cell properties
 *
 * @example
 * ```ts
 * // Create a new renderer positioned at row 2, column 3 with dimensions 80x24
 * const renderer = new ShadowRenderer(2, 3, 80, 24);
 *
 * // Set some content and render it
 * renderer.writeText(0, 0, contentCells);
 * renderer.render();
 * ```
 *
 * @since 1.0.0
 */
export declare class ShadowRenderer {
    private terminalHeight;
    private terminalWidth;
    private topPosition;
    private leftPosition;
    /**
     * Current scroll position in the content
     *
     * @remarks
     * Tracks the index of the first row visible at the top of the viewport.
     * A value of 0 indicates the content is not scrolled, while higher values
     * indicate the content has been scrolled down by that many rows.
     *
     * This value is used during rendering to determine which portion of the
     * contentBuffer to display in the visible area of the terminal.
     *
     * @see scroll - The getter for accessing this value
     *
     * @private
     */
    private scrollPosition;
    /**
     * Internal buffer representing the current visible state of the terminal
     *
     * @remarks
     * This two-dimensional array stores the actual rendered content as it appears in the terminal.
     * It's organized in a row-major format, with each row containing an array of strings.
     *
     * Unlike contentBuffer which stores full cell information, viewBuffer only contains
     * the string representation of each cell. This buffer is used for diffing against
     * new content to determine what needs to be redrawn during render operations,
     * allowing for efficient partial updates to the terminal display.
     *
     * @private
     */
    private viewBuffer;
    /**
     * Internal buffer containing the content to be rendered
     *
     * @remarks
     * This two-dimensional array stores all content cells in a row-major format,
     * where each row is an array of CellInterface objects representing individual
     * characters with their associated style information.
     *
     * The outer array represents rows, while the inner arrays represent columns within each row.
     * This structure allows for efficient access and manipulation of cell data during
     * the rendering process.
     *
     * @private
     * @see CellInterface
     */
    private contentBuffer;
    /**
     * Creates a new ShadowRenderer instance for terminal-based UI rendering
     *
     * @param terminalHeight - The height of the terminal viewport in rows
     * @param terminalWidth - The width of the terminal viewport in columns
     * @param topPosition - The top-offset position within the terminal
     * @param leftPosition - The left offset position within the terminal
     *
     * @since 1.0.0
     */
    constructor(terminalHeight: number, terminalWidth: number, topPosition: number, leftPosition: number);
    /**
     * Gets the top position offset of the renderer in the terminal
     *
     * @returns The row offset from the top edge of the terminal
     *
     * @since 1.0.0
     */
    get top(): number;
    /**
     * Gets the left position offset of the renderer in the terminal
     *
     * @returns The column offset from the left edge of the terminal
     *
     * @since 1.0.0
     */
    get left(): number;
    /**
     * Gets the width of the renderer's viewport
     *
     * @returns The number of columns visible in the renderer's viewport
     *
     * @since 1.0.0
     */
    get width(): number;
    /**
     * Gets the height of the renderer's viewport
     *
     * @returns The number of rows visible in the renderer's viewport
     *
     * @since 1.0.0
     */
    get height(): number;
    /**
     * Gets the current scroll position
     *
     * @returns The current row index at the top of the viewport
     *
     * @since 1.0.0
     */
    get scroll(): number;
    /**
     * Sets the top position offset of the renderer in the terminal
     *
     * @param top - The row offset from the top edge of the terminal
     *
     * @remarks
     * This setter updates the vertical positioning of the renderer's viewport
     * within the terminal. The top position is used as an offset when calculating
     * absolute cursor positions during rendering operations.
     *
     * Note that changing the top position does not automatically trigger a re-render.
     * You should call the render() method separately after changing the position.
     *
     * @since 1.0.0
     */
    set top(top: number);
    /**
     * Sets the left position offset of the renderer in the terminal
     *
     * @param left - The column offset from the left edge of the terminal
     *
     * @remarks
     * This setter updates the horizontal positioning of the renderer's viewport
     * within the terminal. The left position is used as an offset when calculating
     * absolute cursor positions during rendering operations.
     *
     * Note that changing the left position does not automatically trigger a re-render.
     * You should call the render() method separately after changing the position.
     *
     * @since 1.0.0
     */
    set left(left: number);
    /**
     * Sets the width of the renderer's viewport
     *
     * @param terminalWidth - The number of columns visible in the renderer's viewport
     *
     * @remarks
     * This setter updates the internal width property which controls how many
     * columns are rendered during the rendering process. This should be updated
     * whenever the terminal or display area is resized.
     *
     * Note that changing the width does not automatically trigger a re-render.
     * You should call the render() method separately after changing dimensions.
     *
     * @since 1.0.0
     */
    set width(terminalWidth: number);
    /**
     * Sets the height of the renderer's viewport
     *
     * @param terminalHeight - The number of rows visible in the renderer's viewport
     *
     * @remarks
     * This setter updates the internal height property which controls how many
     * rows are rendered during the rendering process. This should be updated
     * whenever the terminal or display area is resized.
     *
     * Note that changing the height does not automatically trigger a re-render.
     * You should call the render() method separately after changing dimensions.
     *
     * @since 1.0.0
     */
    set height(terminalHeight: number);
    /**
     * Sets the scroll position and renders the updated view
     *
     * @param position - New scroll position or relative movement (if negative)
     *
     * @remarks
     * This setter handles both absolute and relative scrolling:
     * - Positive values set the absolute scroll position
     * - Negative values move relative to the current position
     *
     * If the requested position scrolls beyond the end of the content,
     * the operation is ignored. After setting a valid scroll position,
     * the view is automatically re-rendered.
     *
     * @example
     * ```ts
     * // Set absolute scroll position to row 10
     * renderer.scroll = 10;
     *
     * // Scroll up 3 rows (relative movement)
     * renderer.scroll = -3;
     * ```
     *
     * @since 1.0.0
     */
    set scroll(position: number);
    /**
     * Clears the renderer by removing all content from the screen and resetting internal buffers
     *
     * @returns This method doesn't return a value
     *
     * @example
     * ```ts
     * // Reset the renderer state completely
     * renderer.clear();
     * ```
     *
     * @since 1.0.0
     */
    clear(): void;
    /**
     * Clears the visible content from the terminal screen
     *
     * @returns Nothing
     *
     * @remarks
     * This method builds a string of ANSI escape sequences that move the cursor
     * to the beginning of each line in the view buffer and then clears each line.
     * It doesn't reset the internal buffers, only clears the visible output.
     *
     * @example
     * ```ts
     * // Clear just the screen output without resetting buffers
     * renderer.clearScreen();
     * ```
     *
     * @since 1.0.0
     */
    clearScreen(): void;
    /**
     * Writes text to the specified position in the content buffer
     *
     * @param row - Row position (0-based)
     * @param column - Column position (0-based)
     * @param text - Text to write
     * @param clean - Whether to clear existing content first
     *
     * @remarks
     * This method only updates the internal content buffer and marks cells as dirty.
     * It doesn't immediately render to the screen - call render() to display changes.
     * Only the first line of multi-line text is processed, and a text is truncated
     * if it exceeds terminal boundaries.
     *
     * @example
     * ```ts
     * // Write text in the top-left corner
     * renderer.writeText(0, 0, "Hello world");
     *
     * // Write text at position (5,10) and clear any existing content
     * renderer.writeText(5, 10, "Menu Options", true);
     *
     * // Display the changes
     * renderer.render();
     * ```
     *
     * @since 1.0.0
     */
    writeText(row: number, column: number, text: string, clean?: boolean): void;
    /**
     * Renders the content buffer to the screen using optimized terminal output
     *
     * @param force - Forces all cells to be redrawn, even if they haven't changed
     *
     * @remarks
     * This method performs an optimized render by:
     * - Only rendering the visible portion of the content buffer based on scroll position
     * - Only updating cells that have been marked as dirty (unless force=true)
     * - Clearing trailing content from previous renders
     * - Repositioning the cursor to the bottom right when finished
     *
     * If the content buffer is empty or all content is scrolled out of view,
     * the method will return early without performing any operations.
     *
     * @example
     * ```ts
     * // Normal render - only updates what changed
     * renderer.render();
     *
     * // Force redraw of everything, useful after terminal resize
     * renderer.render(true);
     * ```
     *
     * @since 1.0.0
     */
    render(force?: boolean): void;
    /**
     * Renders a single line of content to the output buffer
     *
     * @param context - The current rendering context
     *
     * @remarks
     * This private method handles the optimization of terminal output by:
     * - Skipping cells that haven't changed since the last render
     * - Only moving the cursor when necessary
     * - Updating the view buffer to reflect what's been rendered
     * - Clearing the dirty flag on cells after they're processed
     *
     * The context object contains all states needed for the rendering process,
     * including the accumulating output string and references to the current
     * content and view lines.
     *
     * @private
     * @since 1.0.0
     */
    private renderLine;
    /**
     * Generates an ANSI escape sequence to move the cursor to a position
     *
     * @param row - The row position relative to renderer's viewport
     * @param column - The column position relative to renderer's viewport (defaults to 0)
     * @returns ANSI escape sequence string for cursor positioning
     *
     * @remarks
     * This private helper method translates relative viewport coordinates to
     * absolute terminal coordinates by adding the renderer's top and left
     * position offsets. The returned value is a string containing the
     * appropriate ANSI escape sequence.
     *
     * @private
     * @since 1.0.0
     */
    private moveCursor;
}