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965 lines
31 KiB
965 lines
31 KiB
'use strict'; |
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/*eslint-disable no-use-before-define*/ |
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var common = require('./common'); |
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var YAMLException = require('./exception'); |
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var DEFAULT_SCHEMA = require('./schema/default'); |
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var _toString = Object.prototype.toString; |
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var _hasOwnProperty = Object.prototype.hasOwnProperty; |
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var CHAR_BOM = 0xFEFF; |
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var CHAR_TAB = 0x09; /* Tab */ |
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var CHAR_LINE_FEED = 0x0A; /* LF */ |
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var CHAR_CARRIAGE_RETURN = 0x0D; /* CR */ |
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var CHAR_SPACE = 0x20; /* Space */ |
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var CHAR_EXCLAMATION = 0x21; /* ! */ |
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var CHAR_DOUBLE_QUOTE = 0x22; /* " */ |
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var CHAR_SHARP = 0x23; /* # */ |
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var CHAR_PERCENT = 0x25; /* % */ |
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var CHAR_AMPERSAND = 0x26; /* & */ |
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var CHAR_SINGLE_QUOTE = 0x27; /* ' */ |
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var CHAR_ASTERISK = 0x2A; /* * */ |
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var CHAR_COMMA = 0x2C; /* , */ |
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var CHAR_MINUS = 0x2D; /* - */ |
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var CHAR_COLON = 0x3A; /* : */ |
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var CHAR_EQUALS = 0x3D; /* = */ |
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var CHAR_GREATER_THAN = 0x3E; /* > */ |
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var CHAR_QUESTION = 0x3F; /* ? */ |
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var CHAR_COMMERCIAL_AT = 0x40; /* @ */ |
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var CHAR_LEFT_SQUARE_BRACKET = 0x5B; /* [ */ |
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var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */ |
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var CHAR_GRAVE_ACCENT = 0x60; /* ` */ |
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var CHAR_LEFT_CURLY_BRACKET = 0x7B; /* { */ |
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var CHAR_VERTICAL_LINE = 0x7C; /* | */ |
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var CHAR_RIGHT_CURLY_BRACKET = 0x7D; /* } */ |
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var ESCAPE_SEQUENCES = {}; |
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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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var DEPRECATED_BOOLEANS_SYNTAX = [ |
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'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON', |
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'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF' |
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]; |
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var DEPRECATED_BASE60_SYNTAX = /^[-+]?[0-9_]+(?::[0-9_]+)+(?:\.[0-9_]*)?$/; |
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function compileStyleMap(schema, map) { |
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var result, keys, index, length, tag, style, type; |
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if (map === null) return {}; |
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result = {}; |
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keys = Object.keys(map); |
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for (index = 0, length = keys.length; index < length; index += 1) { |
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tag = keys[index]; |
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style = String(map[tag]); |
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if (tag.slice(0, 2) === '!!') { |
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tag = 'tag:yaml.org,2002:' + tag.slice(2); |
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} |
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type = schema.compiledTypeMap['fallback'][tag]; |
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if (type && _hasOwnProperty.call(type.styleAliases, style)) { |
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style = type.styleAliases[style]; |
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} |
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result[tag] = style; |
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} |
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return result; |
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} |
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function encodeHex(character) { |
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var string, handle, length; |
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string = character.toString(16).toUpperCase(); |
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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 YAMLException('code point within a string may not be greater than 0xFFFFFFFF'); |
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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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var QUOTING_TYPE_SINGLE = 1, |
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QUOTING_TYPE_DOUBLE = 2; |
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function State(options) { |
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this.schema = options['schema'] || DEFAULT_SCHEMA; |
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this.indent = Math.max(1, (options['indent'] || 2)); |
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this.noArrayIndent = options['noArrayIndent'] || false; |
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this.skipInvalid = options['skipInvalid'] || false; |
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this.flowLevel = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']); |
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this.styleMap = compileStyleMap(this.schema, options['styles'] || null); |
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this.sortKeys = options['sortKeys'] || false; |
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this.lineWidth = options['lineWidth'] || 80; |
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this.noRefs = options['noRefs'] || false; |
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this.noCompatMode = options['noCompatMode'] || false; |
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this.condenseFlow = options['condenseFlow'] || false; |
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this.quotingType = options['quotingType'] === '"' ? QUOTING_TYPE_DOUBLE : QUOTING_TYPE_SINGLE; |
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this.forceQuotes = options['forceQuotes'] || false; |
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this.replacer = typeof options['replacer'] === 'function' ? options['replacer'] : null; |
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this.implicitTypes = this.schema.compiledImplicit; |
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this.explicitTypes = this.schema.compiledExplicit; |
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this.tag = null; |
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this.result = ''; |
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this.duplicates = []; |
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this.usedDuplicates = null; |
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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, spaces) { |
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var ind = common.repeat(' ', spaces), |
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position = 0, |
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next = -1, |
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result = '', |
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line, |
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length = string.length; |
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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, level) { |
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return '\n' + common.repeat(' ', state.indent * level); |
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} |
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function testImplicitResolving(state, str) { |
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var index, length, type; |
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for (index = 0, length = state.implicitTypes.length; index < length; index += 1) { |
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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) { |
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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) { |
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return (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 !== CHAR_BOM) |
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|| (0x10000 <= c && c <= 0x10FFFF); |
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} |
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// [34] ns-char ::= nb-char - s-white |
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// [27] nb-char ::= c-printable - b-char - c-byte-order-mark |
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// [26] b-char ::= b-line-feed | b-carriage-return |
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// Including s-white (for some reason, examples doesn't match specs in this aspect) |
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// ns-char ::= c-printable - b-line-feed - b-carriage-return - c-byte-order-mark |
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function isNsCharOrWhitespace(c) { |
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return isPrintable(c) |
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&& c !== CHAR_BOM |
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// - b-char |
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&& c !== CHAR_CARRIAGE_RETURN |
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&& c !== CHAR_LINE_FEED; |
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} |
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// [127] ns-plain-safe(c) ::= c = flow-out ⇒ ns-plain-safe-out |
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// c = flow-in ⇒ ns-plain-safe-in |
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// c = block-key ⇒ ns-plain-safe-out |
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// c = flow-key ⇒ ns-plain-safe-in |
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// [128] ns-plain-safe-out ::= ns-char |
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// [129] ns-plain-safe-in ::= ns-char - c-flow-indicator |
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// [130] ns-plain-char(c) ::= ( ns-plain-safe(c) - “:” - “#” ) |
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// | ( /* An ns-char preceding */ “#” ) |
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// | ( “:” /* Followed by an ns-plain-safe(c) */ ) |
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function isPlainSafe(c, prev, inblock) { |
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var cIsNsCharOrWhitespace = isNsCharOrWhitespace(c); |
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var cIsNsChar = cIsNsCharOrWhitespace && !isWhitespace(c); |
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return ( |
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// ns-plain-safe |
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inblock ? // c = flow-in |
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cIsNsCharOrWhitespace |
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: cIsNsCharOrWhitespace |
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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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// ns-plain-char |
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&& c !== CHAR_SHARP // false on '#' |
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&& !(prev === CHAR_COLON && !cIsNsChar) // false on ': ' |
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|| (isNsCharOrWhitespace(prev) && !isWhitespace(prev) && c === CHAR_SHARP) // change to true on '[^ ]#' |
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|| (prev === CHAR_COLON && cIsNsChar); // change to true on ':[^ ]' |
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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) { |
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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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// No support of ( ( “?” | “:” | “-” ) /* Followed by an ns-plain-safe(c)) */ ) part |
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return isPrintable(c) && c !== CHAR_BOM |
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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_EQUALS |
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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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// Simplified test for values allowed as the last character in plain style. |
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function isPlainSafeLast(c) { |
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// just not whitespace or colon, it will be checked to be plain character later |
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return !isWhitespace(c) && c !== CHAR_COLON; |
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} |
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// Same as 'string'.codePointAt(pos), but works in older browsers. |
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function codePointAt(string, pos) { |
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var first = string.charCodeAt(pos), second; |
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if (first >= 0xD800 && first <= 0xDBFF && pos + 1 < string.length) { |
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second = string.charCodeAt(pos + 1); |
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if (second >= 0xDC00 && second <= 0xDFFF) { |
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// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae |
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return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; |
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} |
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} |
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return first; |
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} |
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// Determines whether block indentation indicator is required. |
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function needIndentIndicator(string) { |
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var leadingSpaceRe = /^\n* /; |
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return leadingSpaceRe.test(string); |
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} |
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var 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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|
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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(string, singleLineOnly, indentPerLevel, lineWidth, |
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testAmbiguousType, quotingType, forceQuotes, inblock) { |
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var i; |
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var char = 0; |
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var prevChar = null; |
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var hasLineBreak = false; |
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var hasFoldableLine = false; // only checked if shouldTrackWidth |
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var shouldTrackWidth = lineWidth !== -1; |
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var previousLineBreak = -1; // count the first line correctly |
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var plain = isPlainSafeFirst(codePointAt(string, 0)) |
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&& isPlainSafeLast(codePointAt(string, string.length - 1)); |
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if (singleLineOnly || forceQuotes) { |
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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; char >= 0x10000 ? i += 2 : i++) { |
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char = codePointAt(string, 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, prevChar, inblock); |
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prevChar = 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; char >= 0x10000 ? i += 2 : i++) { |
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char = codePointAt(string, 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, prevChar, inblock); |
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prevChar = char; |
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} |
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// in case the end is missing a \n |
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hasFoldableLine = hasFoldableLine || (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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if (plain && !forceQuotes && !testAmbiguousType(string)) { |
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return STYLE_PLAIN; |
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} |
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return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : 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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if (!forceQuotes) { |
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return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL; |
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} |
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return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE; |
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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(state, string, level, iskey, inblock) { |
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state.dump = (function () { |
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if (string.length === 0) { |
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return state.quotingType === QUOTING_TYPE_DOUBLE ? '""' : "''"; |
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} |
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if (!state.noCompatMode) { |
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if (DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1 || DEPRECATED_BASE60_SYNTAX.test(string)) { |
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return state.quotingType === QUOTING_TYPE_DOUBLE ? ('"' + string + '"') : ("'" + string + "'"); |
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} |
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} |
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var 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 |
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// state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound. |
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// state.lineWidth > 40 + state.indent: width decreases until the lower bound. |
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// This behaves better than a constant minimum width which disallows narrower options, |
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// or an indent threshold which causes the width to suddenly increase. |
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var lineWidth = state.lineWidth === -1 |
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? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent); |
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|
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// Without knowing if keys are implicit/explicit, assume implicit for safety. |
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var singleLineOnly = iskey |
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// No block styles in flow mode. |
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|| (state.flowLevel > -1 && level >= state.flowLevel); |
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function testAmbiguity(string) { |
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return testImplicitResolving(state, string); |
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} |
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|
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switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, |
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testAmbiguity, state.quotingType, state.forceQuotes && !iskey, inblock)) { |
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|
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case STYLE_PLAIN: |
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return string; |
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case STYLE_SINGLE: |
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return "'" + string.replace(/'/g, "''") + "'"; |
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case STYLE_LITERAL: |
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return '|' + blockHeader(string, state.indent) |
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+ dropEndingNewline(indentString(string, indent)); |
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case STYLE_FOLDED: |
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return '>' + blockHeader(string, state.indent) |
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+ dropEndingNewline(indentString(foldString(string, lineWidth), indent)); |
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case STYLE_DOUBLE: |
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return '"' + escapeString(string, lineWidth) + '"'; |
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default: |
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throw new YAMLException('impossible error: invalid scalar style'); |
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} |
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}()); |
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} |
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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, indentPerLevel) { |
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var indentIndicator = needIndentIndicator(string) ? String(indentPerLevel) : ''; |
|
|
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// note the special case: the string '\n' counts as a "trailing" empty line. |
|
var clip = string[string.length - 1] === '\n'; |
|
var keep = clip && (string[string.length - 2] === '\n' || string === '\n'); |
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var chomp = keep ? '+' : (clip ? '' : '-'); |
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|
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return indentIndicator + chomp + '\n'; |
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} |
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|
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// (See the note for writeScalar.) |
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function dropEndingNewline(string) { |
|
return string[string.length - 1] === '\n' ? string.slice(0, -1) : string; |
|
} |
|
|
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// Note: a long line without a suitable break point will exceed the width limit. |
|
// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0. |
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function foldString(string, width) { |
|
// In folded style, $k$ consecutive newlines output as $k+1$ newlines— |
|
// unless they're before or after a more-indented line, or at the very |
|
// beginning or end, in which case $k$ maps to $k$. |
|
// Therefore, parse each chunk as newline(s) followed by a content line. |
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var lineRe = /(\n+)([^\n]*)/g; |
|
|
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// first line (possibly an empty line) |
|
var result = (function () { |
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var nextLF = string.indexOf('\n'); |
|
nextLF = nextLF !== -1 ? nextLF : string.length; |
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lineRe.lastIndex = nextLF; |
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return foldLine(string.slice(0, nextLF), width); |
|
}()); |
|
// If we haven't reached the first content line yet, don't add an extra \n. |
|
var prevMoreIndented = string[0] === '\n' || string[0] === ' '; |
|
var moreIndented; |
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|
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// rest of the lines |
|
var match; |
|
while ((match = lineRe.exec(string))) { |
|
var prefix = match[1], line = match[2]; |
|
moreIndented = (line[0] === ' '); |
|
result += prefix |
|
+ (!prevMoreIndented && !moreIndented && line !== '' |
|
? '\n' : '') |
|
+ foldLine(line, width); |
|
prevMoreIndented = moreIndented; |
|
} |
|
|
|
return result; |
|
} |
|
|
|
// Greedy line breaking. |
|
// Picks the longest line under the limit each time, |
|
// otherwise settles for the shortest line over the limit. |
|
// NB. More-indented lines *cannot* be folded, as that would add an extra \n. |
|
function foldLine(line, width) { |
|
if (line === '' || line[0] === ' ') return line; |
|
|
|
// Since a more-indented line adds a \n, breaks can't be followed by a space. |
|
var breakRe = / [^ ]/g; // note: the match index will always be <= length-2. |
|
var match; |
|
// start is an inclusive index. end, curr, and next are exclusive. |
|
var start = 0, end, curr = 0, next = 0; |
|
var result = ''; |
|
|
|
// Invariants: 0 <= start <= length-1. |
|
// 0 <= curr <= next <= max(0, length-2). curr - start <= width. |
|
// Inside the loop: |
|
// A match implies length >= 2, so curr and next are <= length-2. |
|
while ((match = breakRe.exec(line))) { |
|
next = match.index; |
|
// maintain invariant: curr - start <= width |
|
if (next - start > width) { |
|
end = (curr > start) ? curr : next; // derive end <= length-2 |
|
result += '\n' + line.slice(start, end); |
|
// skip the space that was output as \n |
|
start = end + 1; // derive start <= length-1 |
|
} |
|
curr = next; |
|
} |
|
|
|
// By the invariants, start <= length-1, so there is something left over. |
|
// It is either the whole string or a part starting from non-whitespace. |
|
result += '\n'; |
|
// Insert a break if the remainder is too long and there is a break available. |
|
if (line.length - start > width && curr > start) { |
|
result += line.slice(start, curr) + '\n' + line.slice(curr + 1); |
|
} else { |
|
result += line.slice(start); |
|
} |
|
|
|
return result.slice(1); // drop extra \n joiner |
|
} |
|
|
|
// Escapes a double-quoted string. |
|
function escapeString(string) { |
|
var result = ''; |
|
var char = 0; |
|
var escapeSeq; |
|
|
|
for (var i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) { |
|
char = codePointAt(string, i); |
|
escapeSeq = ESCAPE_SEQUENCES[char]; |
|
|
|
if (!escapeSeq && isPrintable(char)) { |
|
result += string[i]; |
|
if (char >= 0x10000) result += string[i + 1]; |
|
} else { |
|
result += escapeSeq || encodeHex(char); |
|
} |
|
} |
|
|
|
return result; |
|
} |
|
|
|
function writeFlowSequence(state, level, object) { |
|
var _result = '', |
|
_tag = state.tag, |
|
index, |
|
length, |
|
value; |
|
|
|
for (index = 0, length = object.length; index < length; index += 1) { |
|
value = object[index]; |
|
|
|
if (state.replacer) { |
|
value = state.replacer.call(object, String(index), value); |
|
} |
|
|
|
// Write only valid elements, put null instead of invalid elements. |
|
if (writeNode(state, level, value, false, false) || |
|
(typeof value === 'undefined' && |
|
writeNode(state, level, null, false, false))) { |
|
|
|
if (_result !== '') _result += ',' + (!state.condenseFlow ? ' ' : ''); |
|
_result += state.dump; |
|
} |
|
} |
|
|
|
state.tag = _tag; |
|
state.dump = '[' + _result + ']'; |
|
} |
|
|
|
function writeBlockSequence(state, level, object, compact) { |
|
var _result = '', |
|
_tag = state.tag, |
|
index, |
|
length, |
|
value; |
|
|
|
for (index = 0, length = object.length; index < length; index += 1) { |
|
value = object[index]; |
|
|
|
if (state.replacer) { |
|
value = state.replacer.call(object, String(index), value); |
|
} |
|
|
|
// Write only valid elements, put null instead of invalid elements. |
|
if (writeNode(state, level + 1, value, true, true, false, true) || |
|
(typeof value === 'undefined' && |
|
writeNode(state, level + 1, null, true, true, false, true))) { |
|
|
|
if (!compact || _result !== '') { |
|
_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, level, object) { |
|
var _result = '', |
|
_tag = state.tag, |
|
objectKeyList = Object.keys(object), |
|
index, |
|
length, |
|
objectKey, |
|
objectValue, |
|
pairBuffer; |
|
|
|
for (index = 0, length = objectKeyList.length; index < length; index += 1) { |
|
|
|
pairBuffer = ''; |
|
if (_result !== '') pairBuffer += ', '; |
|
|
|
if (state.condenseFlow) pairBuffer += '"'; |
|
|
|
objectKey = objectKeyList[index]; |
|
objectValue = object[objectKey]; |
|
|
|
if (state.replacer) { |
|
objectValue = state.replacer.call(object, objectKey, objectValue); |
|
} |
|
|
|
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 ? '' : ' '); |
|
|
|
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, level, object, compact) { |
|
var _result = '', |
|
_tag = state.tag, |
|
objectKeyList = Object.keys(object), |
|
index, |
|
length, |
|
objectKey, |
|
objectValue, |
|
explicitPair, |
|
pairBuffer; |
|
|
|
// 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 YAMLException('sortKeys must be a boolean or a function'); |
|
} |
|
|
|
for (index = 0, length = objectKeyList.length; index < length; index += 1) { |
|
pairBuffer = ''; |
|
|
|
if (!compact || _result !== '') { |
|
pairBuffer += generateNextLine(state, level); |
|
} |
|
|
|
objectKey = objectKeyList[index]; |
|
objectValue = object[objectKey]; |
|
|
|
if (state.replacer) { |
|
objectValue = state.replacer.call(object, objectKey, objectValue); |
|
} |
|
|
|
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); |
|
} |
|
|
|
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, object, explicit) { |
|
var _result, typeList, index, length, type, style; |
|
|
|
typeList = explicit ? state.explicitTypes : state.implicitTypes; |
|
|
|
for (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))) { |
|
|
|
if (explicit) { |
|
if (type.multi && type.representName) { |
|
state.tag = type.representName(object); |
|
} else { |
|
state.tag = type.tag; |
|
} |
|
} else { |
|
state.tag = '?'; |
|
} |
|
|
|
if (type.represent) { |
|
style = state.styleMap[type.tag] || type.defaultStyle; |
|
|
|
if (_toString.call(type.represent) === '[object Function]') { |
|
_result = type.represent(object, style); |
|
} else if (_hasOwnProperty.call(type.represent, style)) { |
|
_result = type.represent[style](object, style); |
|
} else { |
|
throw new YAMLException('!<' + 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, level, object, block, compact, iskey, isblockseq) { |
|
state.tag = null; |
|
state.dump = object; |
|
|
|
if (!detectType(state, object, false)) { |
|
detectType(state, object, true); |
|
} |
|
|
|
var type = _toString.call(state.dump); |
|
var inblock = block; |
|
var tagStr; |
|
|
|
if (block) { |
|
block = (state.flowLevel < 0 || state.flowLevel > level); |
|
} |
|
|
|
var objectOrArray = type === '[object Object]' || type === '[object Array]', |
|
duplicateIndex, |
|
duplicate; |
|
|
|
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]') { |
|
if (block && (state.dump.length !== 0)) { |
|
if (state.noArrayIndent && !isblockseq && level > 0) { |
|
writeBlockSequence(state, level - 1, state.dump, compact); |
|
} else { |
|
writeBlockSequence(state, level, state.dump, compact); |
|
} |
|
if (duplicate) { |
|
state.dump = '&ref_' + duplicateIndex + state.dump; |
|
} |
|
} else { |
|
writeFlowSequence(state, level, state.dump); |
|
if (duplicate) { |
|
state.dump = '&ref_' + duplicateIndex + ' ' + state.dump; |
|
} |
|
} |
|
} else if (type === '[object String]') { |
|
if (state.tag !== '?') { |
|
writeScalar(state, state.dump, level, iskey, inblock); |
|
} |
|
} else if (type === '[object Undefined]') { |
|
return false; |
|
} else { |
|
if (state.skipInvalid) return false; |
|
throw new YAMLException('unacceptable kind of an object to dump ' + type); |
|
} |
|
|
|
if (state.tag !== null && state.tag !== '?') { |
|
// Need to encode all characters except those allowed by the spec: |
|
// |
|
// [35] ns-dec-digit ::= [#x30-#x39] /* 0-9 */ |
|
// [36] ns-hex-digit ::= ns-dec-digit |
|
// | [#x41-#x46] /* A-F */ | [#x61-#x66] /* a-f */ |
|
// [37] ns-ascii-letter ::= [#x41-#x5A] /* A-Z */ | [#x61-#x7A] /* a-z */ |
|
// [38] ns-word-char ::= ns-dec-digit | ns-ascii-letter | “-” |
|
// [39] ns-uri-char ::= “%” ns-hex-digit ns-hex-digit | ns-word-char | “#” |
|
// | “;” | “/” | “?” | “:” | “@” | “&” | “=” | “+” | “$” | “,” |
|
// | “_” | “.” | “!” | “~” | “*” | “'” | “(” | “)” | “[” | “]” |
|
// |
|
// Also need to encode '!' because it has special meaning (end of tag prefix). |
|
// |
|
tagStr = encodeURI( |
|
state.tag[0] === '!' ? state.tag.slice(1) : state.tag |
|
).replace(/!/g, '%21'); |
|
|
|
if (state.tag[0] === '!') { |
|
tagStr = '!' + tagStr; |
|
} else if (tagStr.slice(0, 18) === 'tag:yaml.org,2002:') { |
|
tagStr = '!!' + tagStr.slice(18); |
|
} else { |
|
tagStr = '!<' + tagStr + '>'; |
|
} |
|
|
|
state.dump = tagStr + ' ' + state.dump; |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
function getDuplicateReferences(object, state) { |
|
var objects = [], |
|
duplicatesIndexes = [], |
|
index, |
|
length; |
|
|
|
inspectNode(object, objects, duplicatesIndexes); |
|
|
|
for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) { |
|
state.duplicates.push(objects[duplicatesIndexes[index]]); |
|
} |
|
state.usedDuplicates = new Array(length); |
|
} |
|
|
|
function inspectNode(object, objects, duplicatesIndexes) { |
|
var objectKeyList, |
|
index, |
|
length; |
|
|
|
if (object !== null && typeof object === 'object') { |
|
index = objects.indexOf(object); |
|
if (index !== -1) { |
|
if (duplicatesIndexes.indexOf(index) === -1) { |
|
duplicatesIndexes.push(index); |
|
} |
|
} else { |
|
objects.push(object); |
|
|
|
if (Array.isArray(object)) { |
|
for (index = 0, length = object.length; index < length; index += 1) { |
|
inspectNode(object[index], objects, duplicatesIndexes); |
|
} |
|
} else { |
|
objectKeyList = Object.keys(object); |
|
|
|
for (index = 0, length = objectKeyList.length; index < length; index += 1) { |
|
inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes); |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
function dump(input, options) { |
|
options = options || {}; |
|
|
|
var state = new State(options); |
|
|
|
if (!state.noRefs) getDuplicateReferences(input, state); |
|
|
|
var value = input; |
|
|
|
if (state.replacer) { |
|
value = state.replacer.call({ '': value }, '', value); |
|
} |
|
|
|
if (writeNode(state, 0, value, true, true)) return state.dump + '\n'; |
|
|
|
return ''; |
|
} |
|
|
|
module.exports.dump = dump;
|
|
|