--- /dev/null
+'use strict';
+
+/*eslint-disable no-use-before-define*/
+
+var common = require('./common');
+var YAMLException = require('./exception');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+
+var _toString = Object.prototype.toString;
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+var CHAR_TAB = 0x09; /* Tab */
+var CHAR_LINE_FEED = 0x0A; /* LF */
+var CHAR_CARRIAGE_RETURN = 0x0D; /* CR */
+var CHAR_SPACE = 0x20; /* Space */
+var CHAR_EXCLAMATION = 0x21; /* ! */
+var CHAR_DOUBLE_QUOTE = 0x22; /* " */
+var CHAR_SHARP = 0x23; /* # */
+var CHAR_PERCENT = 0x25; /* % */
+var CHAR_AMPERSAND = 0x26; /* & */
+var CHAR_SINGLE_QUOTE = 0x27; /* ' */
+var CHAR_ASTERISK = 0x2A; /* * */
+var CHAR_COMMA = 0x2C; /* , */
+var CHAR_MINUS = 0x2D; /* - */
+var CHAR_COLON = 0x3A; /* : */
+var CHAR_EQUALS = 0x3D; /* = */
+var CHAR_GREATER_THAN = 0x3E; /* > */
+var CHAR_QUESTION = 0x3F; /* ? */
+var CHAR_COMMERCIAL_AT = 0x40; /* @ */
+var CHAR_LEFT_SQUARE_BRACKET = 0x5B; /* [ */
+var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
+var CHAR_GRAVE_ACCENT = 0x60; /* ` */
+var CHAR_LEFT_CURLY_BRACKET = 0x7B; /* { */
+var CHAR_VERTICAL_LINE = 0x7C; /* | */
+var CHAR_RIGHT_CURLY_BRACKET = 0x7D; /* } */
+
+var ESCAPE_SEQUENCES = {};
+
+ESCAPE_SEQUENCES[0x00] = '\\0';
+ESCAPE_SEQUENCES[0x07] = '\\a';
+ESCAPE_SEQUENCES[0x08] = '\\b';
+ESCAPE_SEQUENCES[0x09] = '\\t';
+ESCAPE_SEQUENCES[0x0A] = '\\n';
+ESCAPE_SEQUENCES[0x0B] = '\\v';
+ESCAPE_SEQUENCES[0x0C] = '\\f';
+ESCAPE_SEQUENCES[0x0D] = '\\r';
+ESCAPE_SEQUENCES[0x1B] = '\\e';
+ESCAPE_SEQUENCES[0x22] = '\\"';
+ESCAPE_SEQUENCES[0x5C] = '\\\\';
+ESCAPE_SEQUENCES[0x85] = '\\N';
+ESCAPE_SEQUENCES[0xA0] = '\\_';
+ESCAPE_SEQUENCES[0x2028] = '\\L';
+ESCAPE_SEQUENCES[0x2029] = '\\P';
+
+var DEPRECATED_BOOLEANS_SYNTAX = [
+ 'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
+ 'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
+];
+
+function compileStyleMap(schema, map) {
+ var result, keys, index, length, tag, style, type;
+
+ if (map === null) return {};
+
+ result = {};
+ keys = Object.keys(map);
+
+ for (index = 0, length = keys.length; index < length; index += 1) {
+ tag = keys[index];
+ style = String(map[tag]);
+
+ if (tag.slice(0, 2) === '!!') {
+ tag = 'tag:yaml.org,2002:' + tag.slice(2);
+ }
+ type = schema.compiledTypeMap['fallback'][tag];
+
+ if (type && _hasOwnProperty.call(type.styleAliases, style)) {
+ style = type.styleAliases[style];
+ }
+
+ result[tag] = style;
+ }
+
+ return result;
+}
+
+function encodeHex(character) {
+ var string, handle, length;
+
+ string = character.toString(16).toUpperCase();
+
+ if (character <= 0xFF) {
+ handle = 'x';
+ length = 2;
+ } else if (character <= 0xFFFF) {
+ handle = 'u';
+ length = 4;
+ } else if (character <= 0xFFFFFFFF) {
+ handle = 'U';
+ length = 8;
+ } else {
+ throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
+ }
+
+ return '\\' + handle + common.repeat('0', length - string.length) + string;
+}
+
+function State(options) {
+ this.schema = options['schema'] || DEFAULT_FULL_SCHEMA;
+ this.indent = Math.max(1, (options['indent'] || 2));
+ this.noArrayIndent = options['noArrayIndent'] || false;
+ this.skipInvalid = options['skipInvalid'] || false;
+ this.flowLevel = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
+ this.styleMap = compileStyleMap(this.schema, options['styles'] || null);
+ this.sortKeys = options['sortKeys'] || false;
+ this.lineWidth = options['lineWidth'] || 80;
+ this.noRefs = options['noRefs'] || false;
+ this.noCompatMode = options['noCompatMode'] || false;
+ this.condenseFlow = options['condenseFlow'] || false;
+
+ this.implicitTypes = this.schema.compiledImplicit;
+ this.explicitTypes = this.schema.compiledExplicit;
+
+ this.tag = null;
+ this.result = '';
+
+ this.duplicates = [];
+ this.usedDuplicates = null;
+}
+
+// Indents every line in a string. Empty lines (\n only) are not indented.
+function indentString(string, spaces) {
+ var ind = common.repeat(' ', spaces),
+ position = 0,
+ next = -1,
+ result = '',
+ line,
+ length = string.length;
+
+ while (position < length) {
+ next = string.indexOf('\n', position);
+ if (next === -1) {
+ line = string.slice(position);
+ position = length;
+ } else {
+ line = string.slice(position, next + 1);
+ position = next + 1;
+ }
+
+ if (line.length && line !== '\n') result += ind;
+
+ result += line;
+ }
+
+ return result;
+}
+
+function generateNextLine(state, level) {
+ return '\n' + common.repeat(' ', state.indent * level);
+}
+
+function testImplicitResolving(state, str) {
+ var index, length, type;
+
+ for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
+ type = state.implicitTypes[index];
+
+ if (type.resolve(str)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+// [33] s-white ::= s-space | s-tab
+function isWhitespace(c) {
+ return c === CHAR_SPACE || c === CHAR_TAB;
+}
+
+// Returns true if the character can be printed without escaping.
+// From YAML 1.2: "any allowed characters known to be non-printable
+// should also be escaped. [However,] This isn’t mandatory"
+// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
+function isPrintable(c) {
+ return (0x00020 <= c && c <= 0x00007E)
+ || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
+ || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
+ || (0x10000 <= c && c <= 0x10FFFF);
+}
+
+// [34] ns-char ::= nb-char - s-white
+// [27] nb-char ::= c-printable - b-char - c-byte-order-mark
+// [26] b-char ::= b-line-feed | b-carriage-return
+// [24] b-line-feed ::= #xA /* LF */
+// [25] b-carriage-return ::= #xD /* CR */
+// [3] c-byte-order-mark ::= #xFEFF
+function isNsChar(c) {
+ return isPrintable(c) && !isWhitespace(c)
+ // byte-order-mark
+ && c !== 0xFEFF
+ // b-char
+ && c !== CHAR_CARRIAGE_RETURN
+ && c !== CHAR_LINE_FEED;
+}
+
+// Simplified test for values allowed after the first character in plain style.
+function isPlainSafe(c, prev) {
+ // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
+ // where nb-char ::= c-printable - b-char - c-byte-order-mark.
+ return isPrintable(c) && c !== 0xFEFF
+ // - c-flow-indicator
+ && c !== CHAR_COMMA
+ && c !== CHAR_LEFT_SQUARE_BRACKET
+ && c !== CHAR_RIGHT_SQUARE_BRACKET
+ && c !== CHAR_LEFT_CURLY_BRACKET
+ && c !== CHAR_RIGHT_CURLY_BRACKET
+ // - ":" - "#"
+ // /* An ns-char preceding */ "#"
+ && c !== CHAR_COLON
+ && ((c !== CHAR_SHARP) || (prev && isNsChar(prev)));
+}
+
+// Simplified test for values allowed as the first character in plain style.
+function isPlainSafeFirst(c) {
+ // Uses a subset of ns-char - c-indicator
+ // where ns-char = nb-char - s-white.
+ return isPrintable(c) && c !== 0xFEFF
+ && !isWhitespace(c) // - s-white
+ // - (c-indicator ::=
+ // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
+ && c !== CHAR_MINUS
+ && c !== CHAR_QUESTION
+ && c !== CHAR_COLON
+ && c !== CHAR_COMMA
+ && c !== CHAR_LEFT_SQUARE_BRACKET
+ && c !== CHAR_RIGHT_SQUARE_BRACKET
+ && c !== CHAR_LEFT_CURLY_BRACKET
+ && c !== CHAR_RIGHT_CURLY_BRACKET
+ // | “#” | “&” | “*” | “!” | “|” | “=” | “>” | “'” | “"”
+ && c !== CHAR_SHARP
+ && c !== CHAR_AMPERSAND
+ && c !== CHAR_ASTERISK
+ && c !== CHAR_EXCLAMATION
+ && c !== CHAR_VERTICAL_LINE
+ && c !== CHAR_EQUALS
+ && c !== CHAR_GREATER_THAN
+ && c !== CHAR_SINGLE_QUOTE
+ && c !== CHAR_DOUBLE_QUOTE
+ // | “%” | “@” | “`”)
+ && c !== CHAR_PERCENT
+ && c !== CHAR_COMMERCIAL_AT
+ && c !== CHAR_GRAVE_ACCENT;
+}
+
+// Determines whether block indentation indicator is required.
+function needIndentIndicator(string) {
+ var leadingSpaceRe = /^\n* /;
+ return leadingSpaceRe.test(string);
+}
+
+var STYLE_PLAIN = 1,
+ STYLE_SINGLE = 2,
+ STYLE_LITERAL = 3,
+ STYLE_FOLDED = 4,
+ STYLE_DOUBLE = 5;
+
+// Determines which scalar styles are possible and returns the preferred style.
+// lineWidth = -1 => no limit.
+// Pre-conditions: str.length > 0.
+// Post-conditions:
+// STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
+// STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
+// STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
+function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
+ var i;
+ var char, prev_char;
+ var hasLineBreak = false;
+ var hasFoldableLine = false; // only checked if shouldTrackWidth
+ var shouldTrackWidth = lineWidth !== -1;
+ var previousLineBreak = -1; // count the first line correctly
+ var plain = isPlainSafeFirst(string.charCodeAt(0))
+ && !isWhitespace(string.charCodeAt(string.length - 1));
+
+ if (singleLineOnly) {
+ // Case: no block styles.
+ // Check for disallowed characters to rule out plain and single.
+ for (i = 0; i < string.length; i++) {
+ char = string.charCodeAt(i);
+ if (!isPrintable(char)) {
+ return STYLE_DOUBLE;
+ }
+ prev_char = i > 0 ? string.charCodeAt(i - 1) : null;
+ plain = plain && isPlainSafe(char, prev_char);
+ }
+ } else {
+ // Case: block styles permitted.
+ for (i = 0; i < string.length; i++) {
+ char = string.charCodeAt(i);
+ if (char === CHAR_LINE_FEED) {
+ hasLineBreak = true;
+ // Check if any line can be folded.
+ if (shouldTrackWidth) {
+ hasFoldableLine = hasFoldableLine ||
+ // Foldable line = too long, and not more-indented.
+ (i - previousLineBreak - 1 > lineWidth &&
+ string[previousLineBreak + 1] !== ' ');
+ previousLineBreak = i;
+ }
+ } else if (!isPrintable(char)) {
+ return STYLE_DOUBLE;
+ }
+ prev_char = i > 0 ? string.charCodeAt(i - 1) : null;
+ plain = plain && isPlainSafe(char, prev_char);
+ }
+ // in case the end is missing a \n
+ hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
+ (i - previousLineBreak - 1 > lineWidth &&
+ string[previousLineBreak + 1] !== ' '));
+ }
+ // Although every style can represent \n without escaping, prefer block styles
+ // for multiline, since they're more readable and they don't add empty lines.
+ // Also prefer folding a super-long line.
+ if (!hasLineBreak && !hasFoldableLine) {
+ // Strings interpretable as another type have to be quoted;
+ // e.g. the string 'true' vs. the boolean true.
+ return plain && !testAmbiguousType(string)
+ ? STYLE_PLAIN : STYLE_SINGLE;
+ }
+ // Edge case: block indentation indicator can only have one digit.
+ if (indentPerLevel > 9 && needIndentIndicator(string)) {
+ return STYLE_DOUBLE;
+ }
+ // At this point we know block styles are valid.
+ // Prefer literal style unless we want to fold.
+ return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
+}
+
+// Note: line breaking/folding is implemented for only the folded style.
+// NB. We drop the last trailing newline (if any) of a returned block scalar
+// since the dumper adds its own newline. This always works:
+// • No ending newline => unaffected; already using strip "-" chomping.
+// • Ending newline => removed then restored.
+// Importantly, this keeps the "+" chomp indicator from gaining an extra line.
+function writeScalar(state, string, level, iskey) {
+ state.dump = (function () {
+ if (string.length === 0) {
+ return "''";
+ }
+ if (!state.noCompatMode &&
+ DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
+ return "'" + string + "'";
+ }
+
+ var indent = state.indent * Math.max(1, level); // no 0-indent scalars
+ // As indentation gets deeper, let the width decrease monotonically
+ // to the lower bound min(state.lineWidth, 40).
+ // 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.
+ var 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.
+ var singleLineOnly = iskey
+ // No block styles in flow mode.
+ || (state.flowLevel > -1 && level >= state.flowLevel);
+ function testAmbiguity(string) {
+ return testImplicitResolving(state, string);
+ }
+
+ 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, lineWidth) + '"';
+ default:
+ throw new YAMLException('impossible error: invalid scalar style');
+ }
+ }());
+}
+
+// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
+function blockHeader(string, indentPerLevel) {
+ var indentIndicator = needIndentIndicator(string) ? String(indentPerLevel) : '';
+
+ // 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');
+ var chomp = keep ? '+' : (clip ? '' : '-');
+
+ return indentIndicator + chomp + '\n';
+}
+
+// (See the note for writeScalar.)
+function dropEndingNewline(string) {
+ return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
+}
+
+// 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.
+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.
+ var lineRe = /(\n+)([^\n]*)/g;
+
+ // first line (possibly an empty line)
+ var result = (function () {
+ var nextLF = string.indexOf('\n');
+ nextLF = nextLF !== -1 ? nextLF : string.length;
+ lineRe.lastIndex = nextLF;
+ 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;
+
+ // 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, nextChar;
+ var escapeSeq;
+
+ for (var i = 0; i < string.length; i++) {
+ char = string.charCodeAt(i);
+ // Check for surrogate pairs (reference Unicode 3.0 section "3.7 Surrogates").
+ if (char >= 0xD800 && char <= 0xDBFF/* high surrogate */) {
+ nextChar = string.charCodeAt(i + 1);
+ if (nextChar >= 0xDC00 && nextChar <= 0xDFFF/* low surrogate */) {
+ // Combine the surrogate pair and store it escaped.
+ result += encodeHex((char - 0xD800) * 0x400 + nextChar - 0xDC00 + 0x10000);
+ // Advance index one extra since we already used that char here.
+ i++; continue;
+ }
+ }
+ escapeSeq = ESCAPE_SEQUENCES[char];
+ result += !escapeSeq && isPrintable(char)
+ ? string[i]
+ : escapeSeq || encodeHex(char);
+ }
+
+ return result;
+}
+
+function writeFlowSequence(state, level, object) {
+ var _result = '',
+ _tag = state.tag,
+ index,
+ length;
+
+ for (index = 0, length = object.length; index < length; index += 1) {
+ // Write only valid elements.
+ 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, level, object, compact) {
+ var _result = '',
+ _tag = state.tag,
+ index,
+ length;
+
+ for (index = 0, length = object.length; index < length; index += 1) {
+ // Write only valid elements.
+ 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, 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 (index !== 0) pairBuffer += ', ';
+
+ if (state.condenseFlow) pairBuffer += '"';
+
+ objectKey = objectKeyList[index];
+ objectValue = object[objectKey];
+
+ 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 || index !== 0) {
+ pairBuffer += generateNextLine(state, level);
+ }
+
+ objectKey = objectKeyList[index];
+ objectValue = object[objectKey];
+
+ 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))) {
+
+ 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(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) {
+ state.tag = null;
+ state.dump = object;
+
+ if (!detectType(state, object, false)) {
+ detectType(state, object, true);
+ }
+
+ var type = _toString.call(state.dump);
+
+ 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]') {
+ var 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 YAMLException('unacceptable kind of an object to dump ' + type);
+ }
+
+ if (state.tag !== null && state.tag !== '?') {
+ state.dump = '!<' + state.tag + '> ' + 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);
+
+ if (writeNode(state, 0, input, true, true)) return state.dump + '\n';
+
+ return '';
+}
+
+function safeDump(input, options) {
+ return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+module.exports.dump = dump;
+module.exports.safeDump = safeDump;
projects / dotfiles / .git / blobdiff