import type { AttributeToken, TagToken, Token } from 'pug-lexer';
import type { Logger } from '../logger';
/**
 * Returns the previous tag token if there was one.
 *
 * @param tokens The token array.
 * @param index The current index within the token array..
 * @returns Previous tag token if there was one.
 */
export declare function previousTagToken(tokens: ReadonlyArray<Token>, index: number): TagToken | undefined;
/**
 * Returns the previous attribute token between the current token and the last occurrence of a `start-attributes` token.
 *
 * @param tokens A reference to the whole token array.
 * @param index The current index on which the cursor is in the token array.
 * @returns Previous attribute token if there was one.
 */
export declare function previousNormalAttributeToken(tokens: ReadonlyArray<Token>, index: number): AttributeToken | undefined;
/**
 * Returns the previous type attribute token or undefined if no attribute is present.
 *
 * @param tokens A reference to the whole token array.
 * @param index The current index on which the cursor is in the token array.
 * @returns Previous attribute token if there was one.
 */
export declare function previousTypeAttributeToken(tokens: ReadonlyArray<Token>, index: number): AttributeToken | undefined;
/**
 * Unwraps line feeds from a given value.
 *
 * @param value The value to unwrap.
 * @returns The unwrapped result.
 */
export declare function unwrapLineFeeds(value: string): string;
/**
 * Indicates whether the attribute is a `style` normal attribute.
 *
 * ---
 *
 * Example style tag:
 * ```
 * span(style="color: red")
 * ```
 *
 * In this case `name` is `style` and `val` is `"color: red"`.
 *
 * ---
 *
 * @param name Name of tag attribute.
 * @param val Value of `style` tag attribute.
 * @returns Whether it's a style attribute that is quoted or not.
 */
export declare function isStyleAttribute(name: string, val: string): boolean;
/**
 * Indicates whether the value is surrounded by the `start` and `end` parameters.
 *
 * @param val Value of a tag attribute.
 * @param start The left hand side of the wrapping.
 * @param end The right hand side of the wrapping.
 * @param offset The offset from left and right where to search from.
 * @returns Whether the value is wrapped with start and end from the offset or not.
 */
export declare function isWrappedWith(val: string, start: string, end: string, offset?: number): boolean;
/**
 * Indicates whether the value is surrounded by quotes.
 *
 * ---
 *
 * Example with double quotes:
 * ```
 * a(href="#")
 * ```
 *
 * In this case `val` is `"#"`.
 *
 * ---
 *
 * Example with single quotes:
 * ```
 * a(href='#')
 * ```
 *
 * In this case `val` is `'#'`.
 *
 * ---
 *
 * Example with no quotes:
 * ```
 * - const route = '#';
 * a(href=route)
 * ```
 *
 * In this case `val` is `route`.
 *
 * ---
 *
 * Special cases:
 * ```
 * a(href='/' + '#')
 * a(href="/" + "#")
 * ```
 *
 * These cases should not be treated as quoted.
 *
 * ---
 *
 * @param val Value of tag attribute.
 * @returns Whether the value is quoted or not.
 */
export declare function isQuoted(val: string): boolean;
/**
 * Detects whether the given value is a single line interpolation or not.
 *
 * @param val The value to check.
 * @returns `true` if it's a single line interpolation, otherwise `false`.
 */
export declare function isSingleLineWithInterpolation(val: string): boolean;
/**
 * Detects whether the given value is a multiline interpolation or not.
 *
 * @param val The value to check.
 * @returns `true` if it's a multiline interpolation, otherwise `false`.
 */
export declare function isMultilineInterpolation(val: string): boolean;
/**
 * Encloses code in brackets and possibly spaces.
 *
 * @param bracketSpacing Specifies whether or not to insert spaces before and after the code.
 * @param code Code that is enclosed in brackets.
 * @param param2 Brackets.
 * @param param2."0" Opening brackets.
 * @param param2."1" Closing brackets.
 * @returns The handled string.
 */
export declare function handleBracketSpacing(bracketSpacing: boolean, code: string, [opening, closing]?: [string, string]): string;
/**
 * Bakes a string.
 *
 * @param rawContent The raw string.
 * @param enclosingQuote Enclosing quote.
 * @param unescapeUnnecessaryEscapes Whether to unescape unnecessary escapes or not. Default: `false`.
 * @returns The baked string.
 * @see [copied from Prettier common util](https://github.com/prettier/prettier/blob/master/src/common/util.js#L647)
 */
export declare function makeString(rawContent: string, enclosingQuote: "'" | '"', unescapeUnnecessaryEscapes?: boolean): string;
/**
 * See [issue #9](https://github.com/prettier/plugin-pug/issues/9) for more details.
 *
 * @param code Code that is checked.
 * @param quotes Quotes.
 * @param otherQuotes Opposite of quotes.
 * @param logger A logger.
 * @returns Whether dangerous quote combinations where detected or not.
 */
export declare function detectDangerousQuoteCombination(code: string, quotes: "'" | '"', otherQuotes: "'" | '"', logger: Logger): boolean;