mirror of
https://github.com/swc-project/swc.git
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900 lines
26 KiB
TypeScript
900 lines
26 KiB
TypeScript
// Loaded from https://deno.land/std@0.78.0/encoding/_yaml/dumper/dumper.ts
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// Ported from js-yaml v3.13.1:
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// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
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// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { YAMLError } from "../error.ts";
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import type { RepresentFn, StyleVariant, Type } from "../type.ts";
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import * as common from "../utils.ts";
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import { DumperState, DumperStateOptions } from "./dumper_state.ts";
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type Any = common.Any;
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type ArrayObject<T = Any> = common.ArrayObject<T>;
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const _toString = Object.prototype.toString;
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const _hasOwnProperty = Object.prototype.hasOwnProperty;
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const CHAR_TAB = 0x09; /* Tab */
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const CHAR_LINE_FEED = 0x0a; /* LF */
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const CHAR_SPACE = 0x20; /* Space */
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const CHAR_EXCLAMATION = 0x21; /* ! */
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const CHAR_DOUBLE_QUOTE = 0x22; /* " */
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const CHAR_SHARP = 0x23; /* # */
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const CHAR_PERCENT = 0x25; /* % */
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const CHAR_AMPERSAND = 0x26; /* & */
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const CHAR_SINGLE_QUOTE = 0x27; /* ' */
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const CHAR_ASTERISK = 0x2a; /* * */
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const CHAR_COMMA = 0x2c; /* , */
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const CHAR_MINUS = 0x2d; /* - */
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const CHAR_COLON = 0x3a; /* : */
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const CHAR_GREATER_THAN = 0x3e; /* > */
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const CHAR_QUESTION = 0x3f; /* ? */
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const CHAR_COMMERCIAL_AT = 0x40; /* @ */
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const CHAR_LEFT_SQUARE_BRACKET = 0x5b; /* [ */
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const CHAR_RIGHT_SQUARE_BRACKET = 0x5d; /* ] */
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const CHAR_GRAVE_ACCENT = 0x60; /* ` */
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const CHAR_LEFT_CURLY_BRACKET = 0x7b; /* { */
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const CHAR_VERTICAL_LINE = 0x7c; /* | */
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const CHAR_RIGHT_CURLY_BRACKET = 0x7d; /* } */
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const ESCAPE_SEQUENCES: { [char: number]: string } = {};
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ESCAPE_SEQUENCES[0x00] = "\\0";
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ESCAPE_SEQUENCES[0x07] = "\\a";
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ESCAPE_SEQUENCES[0x08] = "\\b";
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ESCAPE_SEQUENCES[0x09] = "\\t";
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ESCAPE_SEQUENCES[0x0a] = "\\n";
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ESCAPE_SEQUENCES[0x0b] = "\\v";
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ESCAPE_SEQUENCES[0x0c] = "\\f";
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ESCAPE_SEQUENCES[0x0d] = "\\r";
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ESCAPE_SEQUENCES[0x1b] = "\\e";
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ESCAPE_SEQUENCES[0x22] = '\\"';
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ESCAPE_SEQUENCES[0x5c] = "\\\\";
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ESCAPE_SEQUENCES[0x85] = "\\N";
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ESCAPE_SEQUENCES[0xa0] = "\\_";
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ESCAPE_SEQUENCES[0x2028] = "\\L";
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ESCAPE_SEQUENCES[0x2029] = "\\P";
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const DEPRECATED_BOOLEANS_SYNTAX = [
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"y",
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"Y",
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"yes",
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"Yes",
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"YES",
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"on",
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"On",
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"ON",
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"n",
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"N",
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"no",
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"No",
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"NO",
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"off",
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"Off",
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"OFF",
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];
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function encodeHex(character: number): string {
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const string = character.toString(16).toUpperCase();
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let handle: string;
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let length: number;
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if (character <= 0xff) {
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handle = "x";
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length = 2;
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} else if (character <= 0xffff) {
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handle = "u";
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length = 4;
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} else if (character <= 0xffffffff) {
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handle = "U";
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length = 8;
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} else {
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throw new YAMLError(
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"code point within a string may not be greater than 0xFFFFFFFF",
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);
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}
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return `\\${handle}${common.repeat("0", length - string.length)}${string}`;
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}
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// Indents every line in a string. Empty lines (\n only) are not indented.
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function indentString(string: string, spaces: number): string {
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const ind = common.repeat(" ", spaces),
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length = string.length;
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let position = 0,
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next = -1,
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result = "",
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line: string;
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while (position < length) {
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next = string.indexOf("\n", position);
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if (next === -1) {
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line = string.slice(position);
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position = length;
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} else {
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line = string.slice(position, next + 1);
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position = next + 1;
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}
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if (line.length && line !== "\n") result += ind;
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result += line;
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}
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return result;
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}
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function generateNextLine(state: DumperState, level: number): string {
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return `\n${common.repeat(" ", state.indent * level)}`;
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}
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function testImplicitResolving(state: DumperState, str: string): boolean {
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let type: Type;
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for (
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let index = 0, length = state.implicitTypes.length;
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index < length;
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index += 1
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) {
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type = state.implicitTypes[index];
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if (type.resolve(str)) {
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return true;
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}
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}
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return false;
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}
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// [33] s-white ::= s-space | s-tab
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function isWhitespace(c: number): boolean {
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return c === CHAR_SPACE || c === CHAR_TAB;
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}
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// Returns true if the character can be printed without escaping.
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// From YAML 1.2: "any allowed characters known to be non-printable
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// should also be escaped. [However,] This isn’t mandatory"
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// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
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function isPrintable(c: number): boolean {
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return (
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(0x00020 <= c && c <= 0x00007e) ||
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(0x000a1 <= c && c <= 0x00d7ff && c !== 0x2028 && c !== 0x2029) ||
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(0x0e000 <= c && c <= 0x00fffd && c !== 0xfeff) /* BOM */ ||
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(0x10000 <= c && c <= 0x10ffff)
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);
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}
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// Simplified test for values allowed after the first character in plain style.
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function isPlainSafe(c: number): boolean {
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// Uses a subset of nb-char - c-flow-indicator - ":" - "#"
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// where nb-char ::= c-printable - b-char - c-byte-order-mark.
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return (
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isPrintable(c) &&
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c !== 0xfeff &&
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// - c-flow-indicator
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c !== CHAR_COMMA &&
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c !== CHAR_LEFT_SQUARE_BRACKET &&
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c !== CHAR_RIGHT_SQUARE_BRACKET &&
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c !== CHAR_LEFT_CURLY_BRACKET &&
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c !== CHAR_RIGHT_CURLY_BRACKET &&
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// - ":" - "#"
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c !== CHAR_COLON &&
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c !== CHAR_SHARP
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);
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}
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// Simplified test for values allowed as the first character in plain style.
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function isPlainSafeFirst(c: number): boolean {
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// Uses a subset of ns-char - c-indicator
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// where ns-char = nb-char - s-white.
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return (
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isPrintable(c) &&
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c !== 0xfeff &&
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!isWhitespace(c) && // - s-white
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// - (c-indicator ::=
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// “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
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c !== CHAR_MINUS &&
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c !== CHAR_QUESTION &&
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c !== CHAR_COLON &&
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c !== CHAR_COMMA &&
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c !== CHAR_LEFT_SQUARE_BRACKET &&
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c !== CHAR_RIGHT_SQUARE_BRACKET &&
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c !== CHAR_LEFT_CURLY_BRACKET &&
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c !== CHAR_RIGHT_CURLY_BRACKET &&
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// | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
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c !== CHAR_SHARP &&
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c !== CHAR_AMPERSAND &&
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c !== CHAR_ASTERISK &&
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c !== CHAR_EXCLAMATION &&
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c !== CHAR_VERTICAL_LINE &&
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c !== CHAR_GREATER_THAN &&
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c !== CHAR_SINGLE_QUOTE &&
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c !== CHAR_DOUBLE_QUOTE &&
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// | “%” | “@” | “`”)
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c !== CHAR_PERCENT &&
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c !== CHAR_COMMERCIAL_AT &&
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c !== CHAR_GRAVE_ACCENT
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);
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}
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// Determines whether block indentation indicator is required.
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function needIndentIndicator(string: string): boolean {
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const leadingSpaceRe = /^\n* /;
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return leadingSpaceRe.test(string);
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}
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const STYLE_PLAIN = 1,
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STYLE_SINGLE = 2,
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STYLE_LITERAL = 3,
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STYLE_FOLDED = 4,
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STYLE_DOUBLE = 5;
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// Determines which scalar styles are possible and returns the preferred style.
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// lineWidth = -1 => no limit.
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// Pre-conditions: str.length > 0.
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// Post-conditions:
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// STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
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// STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
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// STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
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function chooseScalarStyle(
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string: string,
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singleLineOnly: boolean,
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indentPerLevel: number,
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lineWidth: number,
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testAmbiguousType: (...args: Any[]) => Any,
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): number {
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const shouldTrackWidth = lineWidth !== -1;
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let hasLineBreak = false,
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hasFoldableLine = false, // only checked if shouldTrackWidth
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previousLineBreak = -1, // count the first line correctly
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plain = isPlainSafeFirst(string.charCodeAt(0)) &&
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!isWhitespace(string.charCodeAt(string.length - 1));
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let char: number, i: number;
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if (singleLineOnly) {
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// Case: no block styles.
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// Check for disallowed characters to rule out plain and single.
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for (i = 0; i < string.length; i++) {
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char = string.charCodeAt(i);
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if (!isPrintable(char)) {
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return STYLE_DOUBLE;
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}
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plain = plain && isPlainSafe(char);
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}
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} else {
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// Case: block styles permitted.
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for (i = 0; i < string.length; i++) {
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char = string.charCodeAt(i);
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if (char === CHAR_LINE_FEED) {
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hasLineBreak = true;
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// Check if any line can be folded.
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if (shouldTrackWidth) {
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hasFoldableLine = hasFoldableLine ||
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// Foldable line = too long, and not more-indented.
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(i - previousLineBreak - 1 > lineWidth &&
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string[previousLineBreak + 1] !== " ");
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previousLineBreak = i;
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}
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} else if (!isPrintable(char)) {
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return STYLE_DOUBLE;
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}
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plain = plain && isPlainSafe(char);
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}
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// in case the end is missing a \n
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hasFoldableLine = hasFoldableLine ||
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(shouldTrackWidth &&
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i - previousLineBreak - 1 > lineWidth &&
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string[previousLineBreak + 1] !== " ");
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}
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// Although every style can represent \n without escaping, prefer block styles
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// for multiline, since they're more readable and they don't add empty lines.
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// Also prefer folding a super-long line.
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if (!hasLineBreak && !hasFoldableLine) {
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// Strings interpretable as another type have to be quoted;
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// e.g. the string 'true' vs. the boolean true.
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return plain && !testAmbiguousType(string) ? STYLE_PLAIN : STYLE_SINGLE;
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}
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// Edge case: block indentation indicator can only have one digit.
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if (indentPerLevel > 9 && needIndentIndicator(string)) {
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return STYLE_DOUBLE;
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}
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// At this point we know block styles are valid.
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// Prefer literal style unless we want to fold.
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return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
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}
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// Greedy line breaking.
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// Picks the longest line under the limit each time,
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// otherwise settles for the shortest line over the limit.
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// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
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function foldLine(line: string, width: number): string {
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if (line === "" || line[0] === " ") return line;
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// Since a more-indented line adds a \n, breaks can't be followed by a space.
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const breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
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let match;
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// start is an inclusive index. end, curr, and next are exclusive.
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let start = 0,
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end,
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curr = 0,
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next = 0;
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let result = "";
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// Invariants: 0 <= start <= length-1.
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// 0 <= curr <= next <= max(0, length-2). curr - start <= width.
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// Inside the loop:
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// A match implies length >= 2, so curr and next are <= length-2.
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// tslint:disable-next-line:no-conditional-assignment
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while ((match = breakRe.exec(line))) {
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next = match.index;
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// maintain invariant: curr - start <= width
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if (next - start > width) {
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end = curr > start ? curr : next; // derive end <= length-2
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result += `\n${line.slice(start, end)}`;
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// skip the space that was output as \n
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start = end + 1; // derive start <= length-1
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}
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curr = next;
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}
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// By the invariants, start <= length-1, so there is something left over.
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// It is either the whole string or a part starting from non-whitespace.
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result += "\n";
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// Insert a break if the remainder is too long and there is a break available.
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if (line.length - start > width && curr > start) {
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result += `${line.slice(start, curr)}\n${line.slice(curr + 1)}`;
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} else {
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result += line.slice(start);
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}
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return result.slice(1); // drop extra \n joiner
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}
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// (See the note for writeScalar.)
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function dropEndingNewline(string: string): string {
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return string[string.length - 1] === "\n" ? string.slice(0, -1) : string;
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}
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// Note: a long line without a suitable break point will exceed the width limit.
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// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
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function foldString(string: string, width: number): string {
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// In folded style, $k$ consecutive newlines output as $k+1$ newlines—
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// unless they're before or after a more-indented line, or at the very
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// beginning or end, in which case $k$ maps to $k$.
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// Therefore, parse each chunk as newline(s) followed by a content line.
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const lineRe = /(\n+)([^\n]*)/g;
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// first line (possibly an empty line)
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let result = ((): string => {
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let nextLF = string.indexOf("\n");
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nextLF = nextLF !== -1 ? nextLF : string.length;
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lineRe.lastIndex = nextLF;
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// eslint-disable-next-line @typescript-eslint/no-use-before-define
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return foldLine(string.slice(0, nextLF), width);
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})();
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// If we haven't reached the first content line yet, don't add an extra \n.
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let prevMoreIndented = string[0] === "\n" || string[0] === " ";
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let moreIndented;
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// rest of the lines
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let match;
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// tslint:disable-next-line:no-conditional-assignment
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while ((match = lineRe.exec(string))) {
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const prefix = match[1],
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line = match[2];
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moreIndented = line[0] === " ";
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result += prefix +
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(!prevMoreIndented && !moreIndented && line !== "" ? "\n" : "") +
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// eslint-disable-next-line @typescript-eslint/no-use-before-define
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foldLine(line, width);
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prevMoreIndented = moreIndented;
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}
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return result;
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}
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// Escapes a double-quoted string.
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function escapeString(string: string): string {
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let result = "";
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let char, nextChar;
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let escapeSeq;
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for (let i = 0; i < string.length; i++) {
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char = string.charCodeAt(i);
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// Check for surrogate pairs (reference Unicode 3.0 section "3.7 Surrogates").
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if (char >= 0xd800 && char <= 0xdbff /* high surrogate */) {
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nextChar = string.charCodeAt(i + 1);
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if (nextChar >= 0xdc00 && nextChar <= 0xdfff /* low surrogate */) {
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// Combine the surrogate pair and store it escaped.
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result += encodeHex(
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(char - 0xd800) * 0x400 + nextChar - 0xdc00 + 0x10000,
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);
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// Advance index one extra since we already used that char here.
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i++;
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continue;
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}
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}
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escapeSeq = ESCAPE_SEQUENCES[char];
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result += !escapeSeq && isPrintable(char)
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? string[i]
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: escapeSeq || encodeHex(char);
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}
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return result;
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}
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// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
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function blockHeader(string: string, indentPerLevel: number): string {
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const indentIndicator = needIndentIndicator(string)
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? String(indentPerLevel)
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: "";
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// note the special case: the string '\n' counts as a "trailing" empty line.
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const clip = string[string.length - 1] === "\n";
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const keep = clip && (string[string.length - 2] === "\n" || string === "\n");
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const chomp = keep ? "+" : clip ? "" : "-";
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return `${indentIndicator}${chomp}\n`;
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}
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// Note: line breaking/folding is implemented for only the folded style.
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// NB. We drop the last trailing newline (if any) of a returned block scalar
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// since the dumper adds its own newline. This always works:
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// • No ending newline => unaffected; already using strip "-" chomping.
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// • Ending newline => removed then restored.
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// Importantly, this keeps the "+" chomp indicator from gaining an extra line.
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function writeScalar(
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state: DumperState,
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string: string,
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level: number,
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iskey: boolean,
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): void {
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state.dump = ((): string => {
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if (string.length === 0) {
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return "''";
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}
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if (
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!state.noCompatMode &&
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DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1
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||
) {
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return `'${string}'`;
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}
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const indent = state.indent * Math.max(1, level); // no 0-indent scalars
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||
// As indentation gets deeper, let the width decrease monotonically
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// to the lower bound min(state.lineWidth, 40).
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// Note that this implies
|
||
// state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
|
||
// state.lineWidth > 40 + state.indent: width decreases until the lower
|
||
// bound.
|
||
// This behaves better than a constant minimum width which disallows
|
||
// narrower options, or an indent threshold which causes the width
|
||
// to suddenly increase.
|
||
const lineWidth = state.lineWidth === -1
|
||
? -1
|
||
: Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);
|
||
|
||
// Without knowing if keys are implicit/explicit,
|
||
// assume implicit for safety.
|
||
const singleLineOnly = iskey ||
|
||
// No block styles in flow mode.
|
||
(state.flowLevel > -1 && level >= state.flowLevel);
|
||
function testAmbiguity(str: string): boolean {
|
||
return testImplicitResolving(state, str);
|
||
}
|
||
|
||
switch (
|
||
chooseScalarStyle(
|
||
string,
|
||
singleLineOnly,
|
||
state.indent,
|
||
lineWidth,
|
||
testAmbiguity,
|
||
)
|
||
) {
|
||
case STYLE_PLAIN:
|
||
return string;
|
||
case STYLE_SINGLE:
|
||
return `'${string.replace(/'/g, "''")}'`;
|
||
case STYLE_LITERAL:
|
||
return `|${blockHeader(string, state.indent)}${
|
||
dropEndingNewline(
|
||
indentString(string, indent),
|
||
)
|
||
}`;
|
||
case STYLE_FOLDED:
|
||
return `>${blockHeader(string, state.indent)}${
|
||
dropEndingNewline(
|
||
indentString(foldString(string, lineWidth), indent),
|
||
)
|
||
}`;
|
||
case STYLE_DOUBLE:
|
||
return `"${escapeString(string)}"`;
|
||
default:
|
||
throw new YAMLError("impossible error: invalid scalar style");
|
||
}
|
||
})();
|
||
}
|
||
|
||
function writeFlowSequence(
|
||
state: DumperState,
|
||
level: number,
|
||
object: Any,
|
||
): void {
|
||
let _result = "";
|
||
const _tag = state.tag;
|
||
|
||
for (let index = 0, length = object.length; index < length; index += 1) {
|
||
// Write only valid elements.
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (writeNode(state, level, object[index], false, false)) {
|
||
if (index !== 0) _result += `,${!state.condenseFlow ? " " : ""}`;
|
||
_result += state.dump;
|
||
}
|
||
}
|
||
|
||
state.tag = _tag;
|
||
state.dump = `[${_result}]`;
|
||
}
|
||
|
||
function writeBlockSequence(
|
||
state: DumperState,
|
||
level: number,
|
||
object: Any,
|
||
compact = false,
|
||
): void {
|
||
let _result = "";
|
||
const _tag = state.tag;
|
||
|
||
for (let index = 0, length = object.length; index < length; index += 1) {
|
||
// Write only valid elements.
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (writeNode(state, level + 1, object[index], true, true)) {
|
||
if (!compact || index !== 0) {
|
||
_result += generateNextLine(state, level);
|
||
}
|
||
|
||
if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
|
||
_result += "-";
|
||
} else {
|
||
_result += "- ";
|
||
}
|
||
|
||
_result += state.dump;
|
||
}
|
||
}
|
||
|
||
state.tag = _tag;
|
||
state.dump = _result || "[]"; // Empty sequence if no valid values.
|
||
}
|
||
|
||
function writeFlowMapping(
|
||
state: DumperState,
|
||
level: number,
|
||
object: Any,
|
||
): void {
|
||
let _result = "";
|
||
const _tag = state.tag,
|
||
objectKeyList = Object.keys(object);
|
||
|
||
let pairBuffer: string, objectKey: string, objectValue: Any;
|
||
for (
|
||
let index = 0, length = objectKeyList.length;
|
||
index < length;
|
||
index += 1
|
||
) {
|
||
pairBuffer = state.condenseFlow ? '"' : "";
|
||
|
||
if (index !== 0) pairBuffer += ", ";
|
||
|
||
objectKey = objectKeyList[index];
|
||
objectValue = object[objectKey];
|
||
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (!writeNode(state, level, objectKey, false, false)) {
|
||
continue; // Skip this pair because of invalid key;
|
||
}
|
||
|
||
if (state.dump.length > 1024) pairBuffer += "? ";
|
||
|
||
pairBuffer += `${state.dump}${state.condenseFlow ? '"' : ""}:${
|
||
state.condenseFlow ? "" : " "
|
||
}`;
|
||
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (!writeNode(state, level, objectValue, false, false)) {
|
||
continue; // Skip this pair because of invalid value.
|
||
}
|
||
|
||
pairBuffer += state.dump;
|
||
|
||
// Both key and value are valid.
|
||
_result += pairBuffer;
|
||
}
|
||
|
||
state.tag = _tag;
|
||
state.dump = `{${_result}}`;
|
||
}
|
||
|
||
function writeBlockMapping(
|
||
state: DumperState,
|
||
level: number,
|
||
object: Any,
|
||
compact = false,
|
||
): void {
|
||
const _tag = state.tag,
|
||
objectKeyList = Object.keys(object);
|
||
let _result = "";
|
||
|
||
// Allow sorting keys so that the output file is deterministic
|
||
if (state.sortKeys === true) {
|
||
// Default sorting
|
||
objectKeyList.sort();
|
||
} else if (typeof state.sortKeys === "function") {
|
||
// Custom sort function
|
||
objectKeyList.sort(state.sortKeys);
|
||
} else if (state.sortKeys) {
|
||
// Something is wrong
|
||
throw new YAMLError("sortKeys must be a boolean or a function");
|
||
}
|
||
|
||
let pairBuffer = "",
|
||
objectKey: string,
|
||
objectValue: Any,
|
||
explicitPair: boolean;
|
||
for (
|
||
let index = 0, length = objectKeyList.length;
|
||
index < length;
|
||
index += 1
|
||
) {
|
||
pairBuffer = "";
|
||
|
||
if (!compact || index !== 0) {
|
||
pairBuffer += generateNextLine(state, level);
|
||
}
|
||
|
||
objectKey = objectKeyList[index];
|
||
objectValue = object[objectKey];
|
||
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (!writeNode(state, level + 1, objectKey, true, true, true)) {
|
||
continue; // Skip this pair because of invalid key.
|
||
}
|
||
|
||
explicitPair = (state.tag !== null && state.tag !== "?") ||
|
||
(state.dump && state.dump.length > 1024);
|
||
|
||
if (explicitPair) {
|
||
if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
|
||
pairBuffer += "?";
|
||
} else {
|
||
pairBuffer += "? ";
|
||
}
|
||
}
|
||
|
||
pairBuffer += state.dump;
|
||
|
||
if (explicitPair) {
|
||
pairBuffer += generateNextLine(state, level);
|
||
}
|
||
|
||
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
||
if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
|
||
continue; // Skip this pair because of invalid value.
|
||
}
|
||
|
||
if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
|
||
pairBuffer += ":";
|
||
} else {
|
||
pairBuffer += ": ";
|
||
}
|
||
|
||
pairBuffer += state.dump;
|
||
|
||
// Both key and value are valid.
|
||
_result += pairBuffer;
|
||
}
|
||
|
||
state.tag = _tag;
|
||
state.dump = _result || "{}"; // Empty mapping if no valid pairs.
|
||
}
|
||
|
||
function detectType(
|
||
state: DumperState,
|
||
object: Any,
|
||
explicit = false,
|
||
): boolean {
|
||
const typeList = explicit ? state.explicitTypes : state.implicitTypes;
|
||
|
||
let type: Type;
|
||
let style: StyleVariant;
|
||
let _result: string;
|
||
for (let index = 0, length = typeList.length; index < length; index += 1) {
|
||
type = typeList[index];
|
||
|
||
if (
|
||
(type.instanceOf || type.predicate) &&
|
||
(!type.instanceOf ||
|
||
(typeof object === "object" && object instanceof type.instanceOf)) &&
|
||
(!type.predicate || type.predicate(object))
|
||
) {
|
||
state.tag = explicit ? type.tag : "?";
|
||
|
||
if (type.represent) {
|
||
style = state.styleMap[type.tag] || type.defaultStyle;
|
||
|
||
if (_toString.call(type.represent) === "[object Function]") {
|
||
_result = (type.represent as RepresentFn)(object, style);
|
||
} else if (_hasOwnProperty.call(type.represent, style)) {
|
||
_result = (type.represent as ArrayObject<RepresentFn>)[style](
|
||
object,
|
||
style,
|
||
);
|
||
} else {
|
||
throw new YAMLError(
|
||
`!<${type.tag}> tag resolver accepts not "${style}" style`,
|
||
);
|
||
}
|
||
|
||
state.dump = _result;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
// Serializes `object` and writes it to global `result`.
|
||
// Returns true on success, or false on invalid object.
|
||
//
|
||
function writeNode(
|
||
state: DumperState,
|
||
level: number,
|
||
object: Any,
|
||
block: boolean,
|
||
compact: boolean,
|
||
iskey = false,
|
||
): boolean {
|
||
state.tag = null;
|
||
state.dump = object;
|
||
|
||
if (!detectType(state, object, false)) {
|
||
detectType(state, object, true);
|
||
}
|
||
|
||
const type = _toString.call(state.dump);
|
||
|
||
if (block) {
|
||
block = state.flowLevel < 0 || state.flowLevel > level;
|
||
}
|
||
|
||
const objectOrArray = type === "[object Object]" || type === "[object Array]";
|
||
|
||
let duplicateIndex = -1;
|
||
let duplicate = false;
|
||
if (objectOrArray) {
|
||
duplicateIndex = state.duplicates.indexOf(object);
|
||
duplicate = duplicateIndex !== -1;
|
||
}
|
||
|
||
if (
|
||
(state.tag !== null && state.tag !== "?") ||
|
||
duplicate ||
|
||
(state.indent !== 2 && level > 0)
|
||
) {
|
||
compact = false;
|
||
}
|
||
|
||
if (duplicate && state.usedDuplicates[duplicateIndex]) {
|
||
state.dump = `*ref_${duplicateIndex}`;
|
||
} else {
|
||
if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
|
||
state.usedDuplicates[duplicateIndex] = true;
|
||
}
|
||
if (type === "[object Object]") {
|
||
if (block && Object.keys(state.dump).length !== 0) {
|
||
writeBlockMapping(state, level, state.dump, compact);
|
||
if (duplicate) {
|
||
state.dump = `&ref_${duplicateIndex}${state.dump}`;
|
||
}
|
||
} else {
|
||
writeFlowMapping(state, level, state.dump);
|
||
if (duplicate) {
|
||
state.dump = `&ref_${duplicateIndex} ${state.dump}`;
|
||
}
|
||
}
|
||
} else if (type === "[object Array]") {
|
||
const arrayLevel = state.noArrayIndent && level > 0 ? level - 1 : level;
|
||
if (block && state.dump.length !== 0) {
|
||
writeBlockSequence(state, arrayLevel, state.dump, compact);
|
||
if (duplicate) {
|
||
state.dump = `&ref_${duplicateIndex}${state.dump}`;
|
||
}
|
||
} else {
|
||
writeFlowSequence(state, arrayLevel, state.dump);
|
||
if (duplicate) {
|
||
state.dump = `&ref_${duplicateIndex} ${state.dump}`;
|
||
}
|
||
}
|
||
} else if (type === "[object String]") {
|
||
if (state.tag !== "?") {
|
||
writeScalar(state, state.dump, level, iskey);
|
||
}
|
||
} else {
|
||
if (state.skipInvalid) return false;
|
||
throw new YAMLError(`unacceptable kind of an object to dump ${type}`);
|
||
}
|
||
|
||
if (state.tag !== null && state.tag !== "?") {
|
||
state.dump = `!<${state.tag}> ${state.dump}`;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
function inspectNode(
|
||
object: Any,
|
||
objects: Any[],
|
||
duplicatesIndexes: number[],
|
||
): void {
|
||
if (object !== null && typeof object === "object") {
|
||
const index = objects.indexOf(object);
|
||
if (index !== -1) {
|
||
if (duplicatesIndexes.indexOf(index) === -1) {
|
||
duplicatesIndexes.push(index);
|
||
}
|
||
} else {
|
||
objects.push(object);
|
||
|
||
if (Array.isArray(object)) {
|
||
for (let idx = 0, length = object.length; idx < length; idx += 1) {
|
||
inspectNode(object[idx], objects, duplicatesIndexes);
|
||
}
|
||
} else {
|
||
const objectKeyList = Object.keys(object);
|
||
|
||
for (
|
||
let idx = 0, length = objectKeyList.length;
|
||
idx < length;
|
||
idx += 1
|
||
) {
|
||
inspectNode(object[objectKeyList[idx]], objects, duplicatesIndexes);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
function getDuplicateReferences(
|
||
object: Record<string, unknown>,
|
||
state: DumperState,
|
||
): void {
|
||
const objects: Any[] = [],
|
||
duplicatesIndexes: number[] = [];
|
||
|
||
inspectNode(object, objects, duplicatesIndexes);
|
||
|
||
const length = duplicatesIndexes.length;
|
||
for (let index = 0; index < length; index += 1) {
|
||
state.duplicates.push(objects[duplicatesIndexes[index]]);
|
||
}
|
||
state.usedDuplicates = new Array(length);
|
||
}
|
||
|
||
export function dump(input: Any, options?: DumperStateOptions): string {
|
||
options = options || {};
|
||
|
||
const state = new DumperState(options);
|
||
|
||
if (!state.noRefs) getDuplicateReferences(input, state);
|
||
|
||
if (writeNode(state, 0, input, true, true)) return `${state.dump}\n`;
|
||
|
||
return "";
|
||
}
|