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(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports", "./scanner"], factory);
}
})(function (require, exports) {
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
exports.getNodeType = exports.stripComments = exports.visit = exports.findNodeAtOffset = exports.contains = exports.getNodeValue = exports.getNodePath = exports.findNodeAtLocation = exports.parseTree = exports.parse = exports.getLocation = void 0;
const scanner_1 = require("./scanner");
var ParseOptions;
(function (ParseOptions) {
ParseOptions.DEFAULT = {
allowTrailingComma: false
};
})(ParseOptions || (ParseOptions = {}));
/**
* For a given offset, evaluate the location in the JSON document. Each segment in the location path is either a property name or an array index.
*/
function getLocation(text, position) {
const segments = []; // strings or numbers
const earlyReturnException = new Object();
let previousNode = undefined;
const previousNodeInst = {
value: {},
offset: 0,
length: 0,
type: 'object',
parent: undefined
};
let isAtPropertyKey = false;
function setPreviousNode(value, offset, length, type) {
previousNodeInst.value = value;
previousNodeInst.offset = offset;
previousNodeInst.length = length;
previousNodeInst.type = type;
previousNodeInst.colonOffset = undefined;
previousNode = previousNodeInst;
}
try {
visit(text, {
onObjectBegin: (offset, length) => {
if (position <= offset) {
throw earlyReturnException;
}
previousNode = undefined;
isAtPropertyKey = position > offset;
segments.push(''); // push a placeholder (will be replaced)
},
onObjectProperty: (name, offset, length) => {
if (position < offset) {
throw earlyReturnException;
}
setPreviousNode(name, offset, length, 'property');
segments[segments.length - 1] = name;
if (position <= offset + length) {
throw earlyReturnException;
}
},
onObjectEnd: (offset, length) => {
if (position <= offset) {
throw earlyReturnException;
}
previousNode = undefined;
segments.pop();
},
onArrayBegin: (offset, length) => {
if (position <= offset) {
throw earlyReturnException;
}
previousNode = undefined;
segments.push(0);
},
onArrayEnd: (offset, length) => {
if (position <= offset) {
throw earlyReturnException;
}
previousNode = undefined;
segments.pop();
},
onLiteralValue: (value, offset, length) => {
if (position < offset) {
throw earlyReturnException;
}
setPreviousNode(value, offset, length, getNodeType(value));
if (position <= offset + length) {
throw earlyReturnException;
}
},
onSeparator: (sep, offset, length) => {
if (position <= offset) {
throw earlyReturnException;
}
if (sep === ':' && previousNode && previousNode.type === 'property') {
previousNode.colonOffset = offset;
isAtPropertyKey = false;
previousNode = undefined;
}
else if (sep === ',') {
const last = segments[segments.length - 1];
if (typeof last === 'number') {
segments[segments.length - 1] = last + 1;
}
else {
isAtPropertyKey = true;
segments[segments.length - 1] = '';
}
previousNode = undefined;
}
}
});
}
catch (e) {
if (e !== earlyReturnException) {
throw e;
}
}
return {
path: segments,
previousNode,
isAtPropertyKey,
matches: (pattern) => {
let k = 0;
for (let i = 0; k < pattern.length && i < segments.length; i++) {
if (pattern[k] === segments[i] || pattern[k] === '*') {
k++;
}
else if (pattern[k] !== '**') {
return false;
}
}
return k === pattern.length;
}
};
}
exports.getLocation = getLocation;
/**
* Parses the given text and returns the object the JSON content represents. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
* Therefore always check the errors list to find out if the input was valid.
*/
function parse(text, errors = [], options = ParseOptions.DEFAULT) {
let currentProperty = null;
let currentParent = [];
const previousParents = [];
function onValue(value) {
if (Array.isArray(currentParent)) {
currentParent.push(value);
}
else if (currentProperty !== null) {
currentParent[currentProperty] = value;
}
}
const visitor = {
onObjectBegin: () => {
const object = {};
onValue(object);
previousParents.push(currentParent);
currentParent = object;
currentProperty = null;
},
onObjectProperty: (name) => {
currentProperty = name;
},
onObjectEnd: () => {
currentParent = previousParents.pop();
},
onArrayBegin: () => {
const array = [];
onValue(array);
previousParents.push(currentParent);
currentParent = array;
currentProperty = null;
},
onArrayEnd: () => {
currentParent = previousParents.pop();
},
onLiteralValue: onValue,
onError: (error, offset, length) => {
errors.push({ error, offset, length });
}
};
visit(text, visitor, options);
return currentParent[0];
}
exports.parse = parse;
/**
* Parses the given text and returns a tree representation the JSON content. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
*/
function parseTree(text, errors = [], options = ParseOptions.DEFAULT) {
let currentParent = { type: 'array', offset: -1, length: -1, children: [], parent: undefined }; // artificial root
function ensurePropertyComplete(endOffset) {
if (currentParent.type === 'property') {
currentParent.length = endOffset - currentParent.offset;
currentParent = currentParent.parent;
}
}
function onValue(valueNode) {
currentParent.children.push(valueNode);
return valueNode;
}
const visitor = {
onObjectBegin: (offset) => {
currentParent = onValue({ type: 'object', offset, length: -1, parent: currentParent, children: [] });
},
onObjectProperty: (name, offset, length) => {
currentParent = onValue({ type: 'property', offset, length: -1, parent: currentParent, children: [] });
currentParent.children.push({ type: 'string', value: name, offset, length, parent: currentParent });
},
onObjectEnd: (offset, length) => {
ensurePropertyComplete(offset + length); // in case of a missing value for a property: make sure property is complete
currentParent.length = offset + length - currentParent.offset;
currentParent = currentParent.parent;
ensurePropertyComplete(offset + length);
},
onArrayBegin: (offset, length) => {
currentParent = onValue({ type: 'array', offset, length: -1, parent: currentParent, children: [] });
},
onArrayEnd: (offset, length) => {
currentParent.length = offset + length - currentParent.offset;
currentParent = currentParent.parent;
ensurePropertyComplete(offset + length);
},
onLiteralValue: (value, offset, length) => {
onValue({ type: getNodeType(value), offset, length, parent: currentParent, value });
ensurePropertyComplete(offset + length);
},
onSeparator: (sep, offset, length) => {
if (currentParent.type === 'property') {
if (sep === ':') {
currentParent.colonOffset = offset;
}
else if (sep === ',') {
ensurePropertyComplete(offset);
}
}
},
onError: (error, offset, length) => {
errors.push({ error, offset, length });
}
};
visit(text, visitor, options);
const result = currentParent.children[0];
if (result) {
delete result.parent;
}
return result;
}
exports.parseTree = parseTree;
/**
* Finds the node at the given path in a JSON DOM.
*/
function findNodeAtLocation(root, path) {
if (!root) {
return undefined;
}
let node = root;
for (let segment of path) {
if (typeof segment === 'string') {
if (node.type !== 'object' || !Array.isArray(node.children)) {
return undefined;
}
let found = false;
for (const propertyNode of node.children) {
if (Array.isArray(propertyNode.children) && propertyNode.children[0].value === segment && propertyNode.children.length === 2) {
node = propertyNode.children[1];
found = true;
break;
}
}
if (!found) {
return undefined;
}
}
else {
const index = segment;
if (node.type !== 'array' || index < 0 || !Array.isArray(node.children) || index >= node.children.length) {
return undefined;
}
node = node.children[index];
}
}
return node;
}
exports.findNodeAtLocation = findNodeAtLocation;
/**
* Gets the JSON path of the given JSON DOM node
*/
function getNodePath(node) {
if (!node.parent || !node.parent.children) {
return [];
}
const path = getNodePath(node.parent);
if (node.parent.type === 'property') {
const key = node.parent.children[0].value;
path.push(key);
}
else if (node.parent.type === 'array') {
const index = node.parent.children.indexOf(node);
if (index !== -1) {
path.push(index);
}
}
return path;
}
exports.getNodePath = getNodePath;
/**
* Evaluates the JavaScript object of the given JSON DOM node
*/
function getNodeValue(node) {
switch (node.type) {
case 'array':
return node.children.map(getNodeValue);
case 'object':
const obj = Object.create(null);
for (let prop of node.children) {
const valueNode = prop.children[1];
if (valueNode) {
obj[prop.children[0].value] = getNodeValue(valueNode);
}
}
return obj;
case 'null':
case 'string':
case 'number':
case 'boolean':
return node.value;
default:
return undefined;
}
}
exports.getNodeValue = getNodeValue;
function contains(node, offset, includeRightBound = false) {
return (offset >= node.offset && offset < (node.offset + node.length)) || includeRightBound && (offset === (node.offset + node.length));
}
exports.contains = contains;
/**
* Finds the most inner node at the given offset. If includeRightBound is set, also finds nodes that end at the given offset.
*/
function findNodeAtOffset(node, offset, includeRightBound = false) {
if (contains(node, offset, includeRightBound)) {
const children = node.children;
if (Array.isArray(children)) {
for (let i = 0; i < children.length && children[i].offset <= offset; i++) {
const item = findNodeAtOffset(children[i], offset, includeRightBound);
if (item) {
return item;
}
}
}
return node;
}
return undefined;
}
exports.findNodeAtOffset = findNodeAtOffset;
/**
* Parses the given text and invokes the visitor functions for each object, array and literal reached.
*/
function visit(text, visitor, options = ParseOptions.DEFAULT) {
const _scanner = (0, scanner_1.createScanner)(text, false);
// Important: Only pass copies of this to visitor functions to prevent accidental modification, and
// to not affect visitor functions which stored a reference to a previous JSONPath
const _jsonPath = [];
function toNoArgVisit(visitFunction) {
return visitFunction ? () => visitFunction(_scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter()) : () => true;
}
function toNoArgVisitWithPath(visitFunction) {
return visitFunction ? () => visitFunction(_scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter(), () => _jsonPath.slice()) : () => true;
}
function toOneArgVisit(visitFunction) {
return visitFunction ? (arg) => visitFunction(arg, _scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter()) : () => true;
}
function toOneArgVisitWithPath(visitFunction) {
return visitFunction ? (arg) => visitFunction(arg, _scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter(), () => _jsonPath.slice()) : () => true;
}
const onObjectBegin = toNoArgVisitWithPath(visitor.onObjectBegin), onObjectProperty = toOneArgVisitWithPath(visitor.onObjectProperty), onObjectEnd = toNoArgVisit(visitor.onObjectEnd), onArrayBegin = toNoArgVisitWithPath(visitor.onArrayBegin), onArrayEnd = toNoArgVisit(visitor.onArrayEnd), onLiteralValue = toOneArgVisitWithPath(visitor.onLiteralValue), onSeparator = toOneArgVisit(visitor.onSeparator), onComment = toNoArgVisit(visitor.onComment), onError = toOneArgVisit(visitor.onError);
const disallowComments = options && options.disallowComments;
const allowTrailingComma = options && options.allowTrailingComma;
function scanNext() {
while (true) {
const token = _scanner.scan();
switch (_scanner.getTokenError()) {
case 4 /* ScanError.InvalidUnicode */:
handleError(14 /* ParseErrorCode.InvalidUnicode */);
break;
case 5 /* ScanError.InvalidEscapeCharacter */:
handleError(15 /* ParseErrorCode.InvalidEscapeCharacter */);
break;
case 3 /* ScanError.UnexpectedEndOfNumber */:
handleError(13 /* ParseErrorCode.UnexpectedEndOfNumber */);
break;
case 1 /* ScanError.UnexpectedEndOfComment */:
if (!disallowComments) {
handleError(11 /* ParseErrorCode.UnexpectedEndOfComment */);
}
break;
case 2 /* ScanError.UnexpectedEndOfString */:
handleError(12 /* ParseErrorCode.UnexpectedEndOfString */);
break;
case 6 /* ScanError.InvalidCharacter */:
handleError(16 /* ParseErrorCode.InvalidCharacter */);
break;
}
switch (token) {
case 12 /* SyntaxKind.LineCommentTrivia */:
case 13 /* SyntaxKind.BlockCommentTrivia */:
if (disallowComments) {
handleError(10 /* ParseErrorCode.InvalidCommentToken */);
}
else {
onComment();
}
break;
case 16 /* SyntaxKind.Unknown */:
handleError(1 /* ParseErrorCode.InvalidSymbol */);
break;
case 15 /* SyntaxKind.Trivia */:
case 14 /* SyntaxKind.LineBreakTrivia */:
break;
default:
return token;
}
}
}
function handleError(error, skipUntilAfter = [], skipUntil = []) {
onError(error);
if (skipUntilAfter.length + skipUntil.length > 0) {
let token = _scanner.getToken();
while (token !== 17 /* SyntaxKind.EOF */) {
if (skipUntilAfter.indexOf(token) !== -1) {
scanNext();
break;
}
else if (skipUntil.indexOf(token) !== -1) {
break;
}
token = scanNext();
}
}
}
function parseString(isValue) {
const value = _scanner.getTokenValue();
if (isValue) {
onLiteralValue(value);
}
else {
onObjectProperty(value);
// add property name afterwards
_jsonPath.push(value);
}
scanNext();
return true;
}
function parseLiteral() {
switch (_scanner.getToken()) {
case 11 /* SyntaxKind.NumericLiteral */:
const tokenValue = _scanner.getTokenValue();
let value = Number(tokenValue);
if (isNaN(value)) {
handleError(2 /* ParseErrorCode.InvalidNumberFormat */);
value = 0;
}
onLiteralValue(value);
break;
case 7 /* SyntaxKind.NullKeyword */:
onLiteralValue(null);
break;
case 8 /* SyntaxKind.TrueKeyword */:
onLiteralValue(true);
break;
case 9 /* SyntaxKind.FalseKeyword */:
onLiteralValue(false);
break;
default:
return false;
}
scanNext();
return true;
}
function parseProperty() {
if (_scanner.getToken() !== 10 /* SyntaxKind.StringLiteral */) {
handleError(3 /* ParseErrorCode.PropertyNameExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
return false;
}
parseString(false);
if (_scanner.getToken() === 6 /* SyntaxKind.ColonToken */) {
onSeparator(':');
scanNext(); // consume colon
if (!parseValue()) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
}
}
else {
handleError(5 /* ParseErrorCode.ColonExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
}
_jsonPath.pop(); // remove processed property name
return true;
}
function parseObject() {
onObjectBegin();
scanNext(); // consume open brace
let needsComma = false;
while (_scanner.getToken() !== 2 /* SyntaxKind.CloseBraceToken */ && _scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
if (_scanner.getToken() === 5 /* SyntaxKind.CommaToken */) {
if (!needsComma) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
}
onSeparator(',');
scanNext(); // consume comma
if (_scanner.getToken() === 2 /* SyntaxKind.CloseBraceToken */ && allowTrailingComma) {
break;
}
}
else if (needsComma) {
handleError(6 /* ParseErrorCode.CommaExpected */, [], []);
}
if (!parseProperty()) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
}
needsComma = true;
}
onObjectEnd();
if (_scanner.getToken() !== 2 /* SyntaxKind.CloseBraceToken */) {
handleError(7 /* ParseErrorCode.CloseBraceExpected */, [2 /* SyntaxKind.CloseBraceToken */], []);
}
else {
scanNext(); // consume close brace
}
return true;
}
function parseArray() {
onArrayBegin();
scanNext(); // consume open bracket
let isFirstElement = true;
let needsComma = false;
while (_scanner.getToken() !== 4 /* SyntaxKind.CloseBracketToken */ && _scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
if (_scanner.getToken() === 5 /* SyntaxKind.CommaToken */) {
if (!needsComma) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
}
onSeparator(',');
scanNext(); // consume comma
if (_scanner.getToken() === 4 /* SyntaxKind.CloseBracketToken */ && allowTrailingComma) {
break;
}
}
else if (needsComma) {
handleError(6 /* ParseErrorCode.CommaExpected */, [], []);
}
if (isFirstElement) {
_jsonPath.push(0);
isFirstElement = false;
}
else {
_jsonPath[_jsonPath.length - 1]++;
}
if (!parseValue()) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], [4 /* SyntaxKind.CloseBracketToken */, 5 /* SyntaxKind.CommaToken */]);
}
needsComma = true;
}
onArrayEnd();
if (!isFirstElement) {
_jsonPath.pop(); // remove array index
}
if (_scanner.getToken() !== 4 /* SyntaxKind.CloseBracketToken */) {
handleError(8 /* ParseErrorCode.CloseBracketExpected */, [4 /* SyntaxKind.CloseBracketToken */], []);
}
else {
scanNext(); // consume close bracket
}
return true;
}
function parseValue() {
switch (_scanner.getToken()) {
case 3 /* SyntaxKind.OpenBracketToken */:
return parseArray();
case 1 /* SyntaxKind.OpenBraceToken */:
return parseObject();
case 10 /* SyntaxKind.StringLiteral */:
return parseString(true);
default:
return parseLiteral();
}
}
scanNext();
if (_scanner.getToken() === 17 /* SyntaxKind.EOF */) {
if (options.allowEmptyContent) {
return true;
}
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
return false;
}
if (!parseValue()) {
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
return false;
}
if (_scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
handleError(9 /* ParseErrorCode.EndOfFileExpected */, [], []);
}
return true;
}
exports.visit = visit;
/**
* Takes JSON with JavaScript-style comments and remove
* them. Optionally replaces every none-newline character
* of comments with a replaceCharacter
*/
function stripComments(text, replaceCh) {
let _scanner = (0, scanner_1.createScanner)(text), parts = [], kind, offset = 0, pos;
do {
pos = _scanner.getPosition();
kind = _scanner.scan();
switch (kind) {
case 12 /* SyntaxKind.LineCommentTrivia */:
case 13 /* SyntaxKind.BlockCommentTrivia */:
case 17 /* SyntaxKind.EOF */:
if (offset !== pos) {
parts.push(text.substring(offset, pos));
}
if (replaceCh !== undefined) {
parts.push(_scanner.getTokenValue().replace(/[^\r\n]/g, replaceCh));
}
offset = _scanner.getPosition();
break;
}
} while (kind !== 17 /* SyntaxKind.EOF */);
return parts.join('');
}
exports.stripComments = stripComments;
function getNodeType(value) {
switch (typeof value) {
case 'boolean': return 'boolean';
case 'number': return 'number';
case 'string': return 'string';
case 'object': {
if (!value) {
return 'null';
}
else if (Array.isArray(value)) {
return 'array';
}
return 'object';
}
default: return 'null';
}
}
exports.getNodeType = getNodeType;
});