import type { AppdxItemHeadLine, ArticleGroupHeadLine, ArticleLine, BlankLine, Line, OtherLine, ParagraphItemLine, SupplProvisionAppdxItemHeadLine, SupplProvisionHeadLine, TableColumnLine, TOCHeadLine } from "../../node/cst/line";
import { LineType } from "../../node/cst/line";
/**
 * The extension of CST with the structure of indent blocks.
 *
 * A `VirtualLine` represents either a physical line or indent/dedent in the lawtext. The `VirtualLine` object has a property named `type` with the type of `VirtualLineType`, and the different types of `VirtualLine` are distinguished by that property.
 */
export type VirtualLine = PhysicalLine | Indent | Dedent;
/**
 * The type identifiers of `VirtualLine` that are not included in {@link LineType}.
 */
export declare enum VirtualOnlyLineType {
    IND = "IND",// Indent
    DED = "DED",// Dedent
    TAG = "TAG",// TOC ArticleGroup
    TSP = "TSP",// TOC SupplProvision
    CAP = "CAP"
}
/**
 * The identifiers that distinguish the different types of `VirtualLine`.
 */
export type VirtualLineType = LineType | VirtualOnlyLineType;
export type PhysicalLine = {
    type: LineType.BNK;
    line: BlankLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.TOC;
    line: TOCHeadLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.ARG | VirtualOnlyLineType.TAG;
    line: ArticleGroupHeadLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.APP;
    line: AppdxItemHeadLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.SPR | VirtualOnlyLineType.TSP;
    line: SupplProvisionHeadLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.SPA;
    line: SupplProvisionAppdxItemHeadLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.ART;
    line: ArticleLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.PIT;
    line: ParagraphItemLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.TBL;
    line: TableColumnLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
} | {
    type: LineType.OTH | VirtualOnlyLineType.CAP;
    line: OtherLine;
    virtualRange: [start: number, end: number];
    virtualIndentDepth: number;
};
export interface Indent {
    type: VirtualOnlyLineType.IND;
    virtualRange: [start: number, end: number];
}
export interface Dedent {
    type: VirtualOnlyLineType.DED;
    virtualRange: [start: number, end: number];
}
export declare const isVirtualLine: (line: Line | VirtualLine) => line is VirtualLine;
/**
 * The parsing logic that converts a sequence of {@link Line}s to {@link VirtualLine}s.
 */
export declare const toVirtualLines: (lines: Line[]) => VirtualLine[];