/**
 * Fenced code block presentation for chat + pager markdown.
 *
 * Renders a bordered panel with a language label, real syntax colors, exact
 * source indentation, and column-accurate soft wrapping (no ellipsis, no
 * dropped characters, wide glyphs never straddle the right border).
 */
import { type HighlightCarry } from "./syntax-highlight.js";
/** Columns consumed by `│ ` + body + ` │`. */
export declare const CODE_BLOCK_CHROME = 4;
export interface CodeFenceState {
    /** Opening run of backticks or tildes — only a matching run closes it. */
    readonly marker: string;
    /** Language name or file path shown in the panel header. */
    readonly label: string;
    /** Synthetic path handed to the highlighter to resolve the language. */
    readonly langPath: string;
    readonly carry: HighlightCarry;
    /** Blank rows held back so trailing padding never reaches the footer. */
    pendingBlanks: number;
}
/** Match an opening fence and capture its marker + info string. */
export declare function matchCodeFenceOpen(line: string): {
    marker: string;
    info: string;
} | undefined;
/** A fence closes on a bare run of the same character, at least as long. */
export declare function isCodeFenceClose(line: string, marker: string): boolean;
export declare function openCodeFence(marker: string, info: string): CodeFenceState;
/** Clamp the panel to the wrap budget so it never overflows the pane. */
export declare function codeBlockWidth(wrapWidth: number): number;
/** Drop blank lines at the block edges so the panel hugs its code. */
export declare function trimCodeBlockBody(lines: readonly string[]): string[];
/**
 * Panel width that fits the widest code line, so a one-line snippet is not
 * stretched across the whole pane. Falls back to `available` when the code is
 * wider than the pane, which is when wrapping takes over.
 */
export declare function codeBlockFitWidth(lines: readonly string[], label: string, available: number): number;
export declare function codeBlockTop(label: string, width: number): string;
export declare function codeBlockBottom(width: number): string;
/** Pad a painted body to the panel's inner width and add both borders. */
export declare function codeBlockRow(body: string, bodyWidth: number, width: number): string;
/**
 * Render one source line as complete panel rows. Blank lines are buffered so a
 * block that ends with padding does not push empty rows against the footer.
 */
export declare function codeBlockRows(source: string, fence: CodeFenceState, width: number): string[];