@circuitly/diff
Version:
A javascript text diff implementation.
86 lines (84 loc) • 12.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.canonicalize = canonicalize;
exports.diffJson = diffJson;
exports.jsonDiff = void 0;
var _base = _interopRequireDefault(require("./base"));
var _line = require("./line");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
var jsonDiff = exports.jsonDiff = new _base["default"]();
// Discriminate between two lines of pretty-printed, serialized JSON where one of them has a
// dangling comma and the other doesn't. Turns out including the dangling comma yields the nicest output:
jsonDiff.useLongestToken = true;
jsonDiff.tokenize = _line.lineDiff.tokenize;
jsonDiff.castInput = function (value, options) {
var undefinedReplacement = options.undefinedReplacement,
_options$stringifyRep = options.stringifyReplacer,
stringifyReplacer = _options$stringifyRep === void 0 ? function (k, v) {
return typeof v === 'undefined' ? undefinedReplacement : v;
} : _options$stringifyRep;
return typeof value === 'string' ? value : JSON.stringify(canonicalize(value, null, null, stringifyReplacer), null, ' ');
};
jsonDiff.equals = function (left, right, options) {
return _base["default"].prototype.equals.call(jsonDiff, left.replace(/,([\r\n])/g, '$1'), right.replace(/,([\r\n])/g, '$1'), options);
};
function diffJson(oldObj, newObj, options) {
return jsonDiff.diff(oldObj, newObj, options);
}
// This function handles the presence of circular references by bailing out when encountering an
// object that is already on the "stack" of items being processed. Accepts an optional replacer
function canonicalize(obj, stack, replacementStack, replacer, key) {
stack = stack || [];
replacementStack = replacementStack || [];
if (replacer) {
obj = replacer(key === undefined ? '' : key, obj);
}
var i;
for (i = 0; i < stack.length; i += 1) {
if (stack[i] === obj) {
return replacementStack[i];
}
}
var canonicalizedObj;
if ('[object Array]' === Object.prototype.toString.call(obj)) {
stack.push(obj);
canonicalizedObj = new Array(obj.length);
replacementStack.push(canonicalizedObj);
for (i = 0; i < obj.length; i += 1) {
canonicalizedObj[i] = canonicalize(obj[i], stack, replacementStack, replacer, String(i));
}
stack.pop();
replacementStack.pop();
return canonicalizedObj;
}
if (obj && obj.toJSON) {
obj = obj.toJSON();
}
if (_typeof(obj) === 'object' && obj !== null) {
stack.push(obj);
canonicalizedObj = {};
replacementStack.push(canonicalizedObj);
var sortedKeys = [],
_key;
for (_key in obj) {
/* istanbul ignore else */
if (Object.prototype.hasOwnProperty.call(obj, _key)) {
sortedKeys.push(_key);
}
}
sortedKeys.sort();
for (i = 0; i < sortedKeys.length; i += 1) {
_key = sortedKeys[i];
canonicalizedObj[_key] = canonicalize(obj[_key], stack, replacementStack, replacer, _key);
}
stack.pop();
replacementStack.pop();
} else {
canonicalizedObj = obj;
}
return canonicalizedObj;
}
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Turns out including the dangling comma yields the nicest output:\njsonDiff.useLongestToken = true;\n\njsonDiff.tokenize = lineDiff.tokenize;\njsonDiff.castInput = function(value, options) {\n  const {undefinedReplacement, stringifyReplacer = (k, v) => typeof v === 'undefined' ? undefinedReplacement : v} = options;\n\n  return typeof value === 'string' ? value : JSON.stringify(canonicalize(value, null, null, stringifyReplacer), null, '  ');\n};\njsonDiff.equals = function(left, right, options) {\n  return Diff.prototype.equals.call(jsonDiff, left.replace(/,([\\r\\n])/g, '$1'), right.replace(/,([\\r\\n])/g, '$1'), options);\n};\n\nexport function diffJson(oldObj, newObj, options) { return jsonDiff.diff(oldObj, newObj, options); }\n\n// This function handles the presence of circular references by bailing out when encountering an\n// object that is already on the \"stack\" of items being processed. Accepts an optional replacer\nexport function canonicalize(obj, stack, replacementStack, replacer, key) {\n  stack = stack || [];\n  replacementStack = replacementStack || [];\n\n  if (replacer) {\n    obj = replacer(key === undefined ? '' : key, obj);\n  }\n\n  let i;\n\n  for (i = 0; i < stack.length; i += 1) {\n    if (stack[i] === obj) {\n      return replacementStack[i];\n    }\n  }\n\n  let canonicalizedObj;\n\n  if ('[object Array]' === Object.prototype.toString.call(obj)) {\n    stack.push(obj);\n    canonicalizedObj = new Array(obj.length);\n    replacementStack.push(canonicalizedObj);\n    for (i = 0; i < obj.length; i += 1) {\n      canonicalizedObj[i] = canonicalize(obj[i], stack, replacementStack, replacer, String(i));\n    }\n    stack.pop();\n    replacementStack.pop();\n    return canonicalizedObj;\n  }\n\n  if (obj && obj.toJSON) {\n    obj = obj.toJSON();\n  }\n\n  if (typeof obj === 'object' && obj !== null) {\n    stack.push(obj);\n    canonicalizedObj = {};\n    replacementStack.push(canonicalizedObj);\n    let sortedKeys = [],\n        key;\n    for (key in obj) {\n      /* istanbul ignore else */\n      if (Object.prototype.hasOwnProperty.call(obj, key)) {\n        sortedKeys.push(key);\n      }\n    }\n    sortedKeys.sort();\n    for (i = 0; i < sortedKeys.length; i += 1) {\n      key = sortedKeys[i];\n      canonicalizedObj[key] = canonicalize(obj[key], stack, replacementStack, replacer, key);\n    }\n    stack.pop();\n    replacementStack.pop();\n  } else {\n    canonicalizedObj = obj;\n  }\n  return canonicalizedObj;\n}\n"],"mappings":";;;;;;;;AAAA,IAAAA,KAAA,GAAAC,sBAAA,CAAAC,OAAA;AACA,IAAAC,KAAA,GAAAD,OAAA;AAAgC,SAAAD,uBAAAG,CAAA,WAAAA,CAAA,IAAAA,CAAA,CAAAC,UAAA,GAAAD,CAAA,gBAAAA,CAAA;AAAA,SAAAE,QAAAC,CAAA,sCAAAD,OAAA,wBAAAE,MAAA,uBAAAA,MAAA,CAAAC,QAAA,aAAAF,CAAA,kBAAAA,CAAA,gBAAAA,CAAA,WAAAA,CAAA,yBAAAC,MAAA,IAAAD,CAAA,CAAAG,WAAA,KAAAF,MAAA,IAAAD,CAAA,KAAAC,MAAA,CAAAG,SAAA,qBAAAJ,CAAA,KAAAD,OAAA,CAAAC,CAAA;AAEzB,IAAMK,QAAQ,GAAAC,OAAA,CAAAD,QAAA,GAAG,IAAIE,gBAAI,CAAC,CAAC;AAClC;AACA;AACAF,QAAQ,CAACG,eAAe,GAAG,IAAI;AAE/BH,QAAQ,CAACI,QAAQ,GAAGC,cAAQ,CAACD,QAAQ;AACrCJ,QAAQ,CAACM,SAAS,GAAG,UAASC,KAAK,EAAEC,OAAO,EAAE;EAC5C,IAAOC,oBAAoB,GAAuFD,OAAO,CAAlHC,oBAAoB;IAAAC,qBAAA,GAAuFF,OAAO,CAA5FG,iBAAiB;IAAjBA,iBAAiB,GAAAD,qBAAA,cAAG,UAACE,CAAC,EAAEC,CAAC;MAAA,OAAK,OAAOA,CAAC,KAAK,WAAW,GAAGJ,oBAAoB,GAAGI,CAAC;IAAA,IAAAH,qBAAA;EAE9G,OAAO,OAAOH,KAAK,KAAK,QAAQ,GAAGA,KAAK,GAAGO,IAAI,CAACC,SAAS,CAACC,YAAY,CAACT,KAAK,EAAE,IAAI,EAAE,IAAI,EAAEI,iBAAiB,CAAC,EAAE,IAAI,EAAE,IAAI,CAAC;AAC3H,CAAC;AACDX,QAAQ,CAACiB,MAAM,GAAG,UAASC,IAAI,EAAEC,KAAK,EAAEX,OAAO,EAAE;EAC/C,OAAON,gBAAI,CAACH,SAAS,CAACkB,MAAM,CAACG,IAAI,CAACpB,QAAQ,EAAEkB,IAAI,CAACG,OAAO,CAAC,YAAY,EAAE,IAAI,CAAC,EAAEF,KAAK,CAACE,OAAO,CAAC,YAAY,EAAE,IAAI,CAAC,EAAEb,OAAO,CAAC;AAC3H,CAAC;AAEM,SAASc,QAAQA,CAACC,MAAM,EAAEC,MAAM,EAAEhB,OAAO,EAAE;EAAE,OAAOR,QAAQ,CAACyB,IAAI,CAACF,MAAM,EAAEC,MAAM,EAAEhB,OAAO,CAAC;AAAE;;AAEnG;AACA;AACO,SAASQ,YAAYA,CAACU,GAAG,EAAEC,KAAK,EAAEC,gBAAgB,EAAEC,QAAQ,EAAEC,GAAG,EAAE;EACxEH,KAAK,GAAGA,KAAK,IAAI,EAAE;EACnBC,gBAAgB,GAAGA,gBAAgB,IAAI,EAAE;EAEzC,IAAIC,QAAQ,EAAE;IACZH,GAAG,GAAGG,QAAQ,CAACC,GAAG,KAAKC,SAAS,GAAG,EAAE,GAAGD,GAAG,EAAEJ,GAAG,CAAC;EACnD;EAEA,IAAIM,CAAC;EAEL,KAAKA,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAGL,KAAK,CAACM,MAAM,EAAED,CAAC,IAAI,CAAC,EAAE;IACpC,IAAIL,KAAK,CAACK,CAAC,CAAC,KAAKN,GAAG,EAAE;MACpB,OAAOE,gBAAgB,CAACI,CAAC,CAAC;IAC5B;EACF;EAEA,IAAIE,gBAAgB;EAEpB,IAAI,gBAAgB,KAAKC,MAAM,CAACpC,SAAS,CAACqC,QAAQ,CAAChB,IAAI,CAACM,GAAG,CAAC,EAAE;IAC5DC,KAAK,CAACU,IAAI,CAACX,GAAG,CAAC;IACfQ,gBAAgB,GAAG,IAAII,KAAK,CAACZ,GAAG,CAACO,MAAM,CAAC;IACxCL,gBAAgB,CAACS,IAAI,CAACH,gBAAgB,CAAC;IACvC,KAAKF,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAGN,GAAG,CAACO,MAAM,EAAED,CAAC,IAAI,CAAC,EAAE;MAClCE,gBAAgB,CAACF,CAAC,CAAC,GAAGhB,YAAY,CAACU,GAAG,CAACM,CAAC,CAAC,EAAEL,KAAK,EAAEC,gBAAgB,EAAEC,QAAQ,EAAEU,MAAM,CAACP,CAAC,CAAC,CAAC;IAC1F;IACAL,KAAK,CAACa,GAAG,CAAC,CAAC;IACXZ,gBAAgB,CAACY,GAAG,CAAC,CAAC;IACtB,OAAON,gBAAgB;EACzB;EAEA,IAAIR,GAAG,IAAIA,GAAG,CAACe,MAAM,EAAE;IACrBf,GAAG,GAAGA,GAAG,CAACe,MAAM,CAAC,CAAC;EACpB;EAEA,IAAI/C,OAAA,CAAOgC,GAAG,MAAK,QAAQ,IAAIA,GAAG,KAAK,IAAI,EAAE;IAC3CC,KAAK,CAACU,IAAI,CAACX,GAAG,CAAC;IACfQ,gBAAgB,GAAG,CAAC,CAAC;IACrBN,gBAAgB,CAACS,IAAI,CAACH,gBAAgB,CAAC;IACvC,IAAIQ,UAAU,GAAG,EAAE;MACfZ,IAAG;IACP,KAAKA,IAAG,IAAIJ,GAAG,EAAE;MACf;MACA,IAAIS,MAAM,CAACpC,SAAS,CAAC4C,cAAc,CAACvB,IAAI,CAACM,GAAG,EAAEI,IAAG,CAAC,EAAE;QAClDY,UAAU,CAACL,IAAI,CAACP,IAAG,CAAC;MACtB;IACF;IACAY,UAAU,CAACE,IAAI,CAAC,CAAC;IACjB,KAAKZ,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAGU,UAAU,CAACT,MAAM,EAAED,CAAC,IAAI,CAAC,EAAE;MACzCF,IAAG,GAAGY,UAAU,CAACV,CAAC,CAAC;MACnBE,gBAAgB,CAACJ,IAAG,CAAC,GAAGd,YAAY,CAACU,GAAG,CAACI,IAAG,CAAC,EAAEH,KAAK,EAAEC,gBAAgB,EAAEC,QAAQ,EAAEC,IAAG,CAAC;IACxF;IACAH,KAAK,CAACa,GAAG,CAAC,CAAC;IACXZ,gBAAgB,CAACY,GAAG,CAAC,CAAC;EACxB,CAAC,MAAM;IACLN,gBAAgB,GAAGR,GAAG;EACxB;EACA,OAAOQ,gBAAgB;AACzB","ignoreList":[]}