@converse/skeletor
Version:
Models and Collections for modern web apps
1,634 lines (1,502 loc) • 403 kB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.skeletor = {}));
})(this, (function (exports) { 'use strict';
/** Used for built-in method references. */
var objectProto$l = Object.prototype;
/**
* Checks if `value` is likely a prototype object.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
*/
function isPrototype(value) {
var Ctor = value && value.constructor,
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$l;
return value === proto;
}
/**
* Creates a unary function that invokes `func` with its argument transformed.
*
* @private
* @param {Function} func The function to wrap.
* @param {Function} transform The argument transform.
* @returns {Function} Returns the new function.
*/
function overArg(func, transform) {
return function(arg) {
return func(transform(arg));
};
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = overArg(Object.keys, Object);
/** Used for built-in method references. */
var objectProto$k = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$h = objectProto$k.hasOwnProperty;
/**
* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeys(object) {
if (!isPrototype(object)) {
return nativeKeys(object);
}
var result = [];
for (var key in Object(object)) {
if (hasOwnProperty$h.call(object, key) && key != 'constructor') {
result.push(key);
}
}
return result;
}
/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
/** Used as a reference to the global object. */
var root$1 = freeGlobal || freeSelf || Function('return this')();
/** Built-in value references. */
var Symbol$1 = root$1.Symbol;
/** Used for built-in method references. */
var objectProto$j = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$g = objectProto$j.hasOwnProperty;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString$2 = objectProto$j.toString;
/** Built-in value references. */
var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
/**
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the raw `toStringTag`.
*/
function getRawTag(value) {
var isOwn = hasOwnProperty$g.call(value, symToStringTag$1),
tag = value[symToStringTag$1];
try {
value[symToStringTag$1] = undefined;
var unmasked = true;
} catch (e) {}
var result = nativeObjectToString$2.call(value);
if (unmasked) {
if (isOwn) {
value[symToStringTag$1] = tag;
} else {
delete value[symToStringTag$1];
}
}
return result;
}
/** Used for built-in method references. */
var objectProto$i = Object.prototype;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString$1 = objectProto$i.toString;
/**
* Converts `value` to a string using `Object.prototype.toString`.
*
* @private
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
*/
function objectToString(value) {
return nativeObjectToString$1.call(value);
}
/** `Object#toString` result references. */
var nullTag = '[object Null]',
undefinedTag = '[object Undefined]';
/** Built-in value references. */
var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
return (symToStringTag && symToStringTag in Object(value))
? getRawTag(value)
: objectToString(value);
}
/**
* Checks if `value` is the
* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject$1(value) {
var type = typeof value;
return value != null && (type == 'object' || type == 'function');
}
/** `Object#toString` result references. */
var asyncTag = '[object AsyncFunction]',
funcTag$2 = '[object Function]',
genTag$1 = '[object GeneratorFunction]',
proxyTag = '[object Proxy]';
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
if (!isObject$1(value)) {
return false;
}
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 9 which returns 'object' for typed arrays and other constructors.
var tag = baseGetTag(value);
return tag == funcTag$2 || tag == genTag$1 || tag == asyncTag || tag == proxyTag;
}
/** Used to detect overreaching core-js shims. */
var coreJsData = root$1['__core-js_shared__'];
/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
return uid ? ('Symbol(src)_1.' + uid) : '';
}());
/**
* Checks if `func` has its source masked.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` is masked, else `false`.
*/
function isMasked(func) {
return !!maskSrcKey && (maskSrcKey in func);
}
/** Used for built-in method references. */
var funcProto$2 = Function.prototype;
/** Used to resolve the decompiled source of functions. */
var funcToString$2 = funcProto$2.toString;
/**
* Converts `func` to its source code.
*
* @private
* @param {Function} func The function to convert.
* @returns {string} Returns the source code.
*/
function toSource(func) {
if (func != null) {
try {
return funcToString$2.call(func);
} catch (e) {}
try {
return (func + '');
} catch (e) {}
}
return '';
}
/**
* Used to match `RegExp`
* [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
*/
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Used for built-in method references. */
var funcProto$1 = Function.prototype,
objectProto$h = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var funcToString$1 = funcProto$1.toString;
/** Used to check objects for own properties. */
var hasOwnProperty$f = objectProto$h.hasOwnProperty;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
funcToString$1.call(hasOwnProperty$f).replace(reRegExpChar, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/**
* The base implementation of `_.isNative` without bad shim checks.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
*/
function baseIsNative(value) {
if (!isObject$1(value) || isMasked(value)) {
return false;
}
var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
return pattern.test(toSource(value));
}
/**
* Gets the value at `key` of `object`.
*
* @private
* @param {Object} [object] The object to query.
* @param {string} key The key of the property to get.
* @returns {*} Returns the property value.
*/
function getValue(object, key) {
return object == null ? undefined : object[key];
}
/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = getValue(object, key);
return baseIsNative(value) ? value : undefined;
}
/* Built-in method references that are verified to be native. */
var DataView = getNative(root$1, 'DataView');
/* Built-in method references that are verified to be native. */
var Map = getNative(root$1, 'Map');
/* Built-in method references that are verified to be native. */
var Promise$1 = getNative(root$1, 'Promise');
/* Built-in method references that are verified to be native. */
var Set = getNative(root$1, 'Set');
/* Built-in method references that are verified to be native. */
var WeakMap = getNative(root$1, 'WeakMap');
/** `Object#toString` result references. */
var mapTag$6 = '[object Map]',
objectTag$4 = '[object Object]',
promiseTag = '[object Promise]',
setTag$6 = '[object Set]',
weakMapTag$2 = '[object WeakMap]';
var dataViewTag$4 = '[object DataView]';
/** Used to detect maps, sets, and weakmaps. */
var dataViewCtorString = toSource(DataView),
mapCtorString = toSource(Map),
promiseCtorString = toSource(Promise$1),
setCtorString = toSource(Set),
weakMapCtorString = toSource(WeakMap);
/**
* Gets the `toStringTag` of `value`.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
var getTag = baseGetTag;
// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag$4) ||
(Map && getTag(new Map) != mapTag$6) ||
(Promise$1 && getTag(Promise$1.resolve()) != promiseTag) ||
(Set && getTag(new Set) != setTag$6) ||
(WeakMap && getTag(new WeakMap) != weakMapTag$2)) {
getTag = function(value) {
var result = baseGetTag(value),
Ctor = result == objectTag$4 ? value.constructor : undefined,
ctorString = Ctor ? toSource(Ctor) : '';
if (ctorString) {
switch (ctorString) {
case dataViewCtorString: return dataViewTag$4;
case mapCtorString: return mapTag$6;
case promiseCtorString: return promiseTag;
case setCtorString: return setTag$6;
case weakMapCtorString: return weakMapTag$2;
}
}
return result;
};
}
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return value != null && typeof value == 'object';
}
/** `Object#toString` result references. */
var argsTag$3 = '[object Arguments]';
/**
* The base implementation of `_.isArguments`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
*/
function baseIsArguments(value) {
return isObjectLike(value) && baseGetTag(value) == argsTag$3;
}
/** Used for built-in method references. */
var objectProto$g = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$e = objectProto$g.hasOwnProperty;
/** Built-in value references. */
var propertyIsEnumerable$1 = objectProto$g.propertyIsEnumerable;
/**
* Checks if `value` is likely an `arguments` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
* else `false`.
* @example
*
* _.isArguments(function() { return arguments; }());
* // => true
*
* _.isArguments([1, 2, 3]);
* // => false
*/
var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
return isObjectLike(value) && hasOwnProperty$e.call(value, 'callee') &&
!propertyIsEnumerable$1.call(value, 'callee');
};
/**
* Checks if `value` is classified as an `Array` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array, else `false`.
* @example
*
* _.isArray([1, 2, 3]);
* // => true
*
* _.isArray(document.body.children);
* // => false
*
* _.isArray('abc');
* // => false
*
* _.isArray(_.noop);
* // => false
*/
var isArray = Array.isArray;
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;
/**
* Checks if `value` is a valid array-like length.
*
* **Note:** This method is loosely based on
* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
* @example
*
* _.isLength(3);
* // => true
*
* _.isLength(Number.MIN_VALUE);
* // => false
*
* _.isLength(Infinity);
* // => false
*
* _.isLength('3');
* // => false
*/
function isLength(value) {
return typeof value == 'number' &&
value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER$1;
}
/**
* Checks if `value` is array-like. A value is considered array-like if it's
* not a function and has a `value.length` that's an integer greater than or
* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
* @example
*
* _.isArrayLike([1, 2, 3]);
* // => true
*
* _.isArrayLike(document.body.children);
* // => true
*
* _.isArrayLike('abc');
* // => true
*
* _.isArrayLike(_.noop);
* // => false
*/
function isArrayLike(value) {
return value != null && isLength(value.length) && !isFunction(value);
}
/**
* This method returns `false`.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {boolean} Returns `false`.
* @example
*
* _.times(2, _.stubFalse);
* // => [false, false]
*/
function stubFalse() {
return false;
}
/** Detect free variable `exports`. */
var freeExports$2 = typeof exports == 'object' && exports && !exports.nodeType && exports;
/** Detect free variable `module`. */
var freeModule$2 = freeExports$2 && typeof module == 'object' && module && !module.nodeType && module;
/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports$2 = freeModule$2 && freeModule$2.exports === freeExports$2;
/** Built-in value references. */
var Buffer$1 = moduleExports$2 ? root$1.Buffer : undefined;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsBuffer = Buffer$1 ? Buffer$1.isBuffer : undefined;
/**
* Checks if `value` is a buffer.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
* @example
*
* _.isBuffer(new Buffer(2));
* // => true
*
* _.isBuffer(new Uint8Array(2));
* // => false
*/
var isBuffer = nativeIsBuffer || stubFalse;
/** `Object#toString` result references. */
var argsTag$2 = '[object Arguments]',
arrayTag$2 = '[object Array]',
boolTag$3 = '[object Boolean]',
dateTag$3 = '[object Date]',
errorTag$2 = '[object Error]',
funcTag$1 = '[object Function]',
mapTag$5 = '[object Map]',
numberTag$3 = '[object Number]',
objectTag$3 = '[object Object]',
regexpTag$3 = '[object RegExp]',
setTag$5 = '[object Set]',
stringTag$4 = '[object String]',
weakMapTag$1 = '[object WeakMap]';
var arrayBufferTag$3 = '[object ArrayBuffer]',
dataViewTag$3 = '[object DataView]',
float32Tag$2 = '[object Float32Array]',
float64Tag$2 = '[object Float64Array]',
int8Tag$2 = '[object Int8Array]',
int16Tag$2 = '[object Int16Array]',
int32Tag$2 = '[object Int32Array]',
uint8Tag$2 = '[object Uint8Array]',
uint8ClampedTag$2 = '[object Uint8ClampedArray]',
uint16Tag$2 = '[object Uint16Array]',
uint32Tag$2 = '[object Uint32Array]';
/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag$2] = typedArrayTags[float64Tag$2] =
typedArrayTags[int8Tag$2] = typedArrayTags[int16Tag$2] =
typedArrayTags[int32Tag$2] = typedArrayTags[uint8Tag$2] =
typedArrayTags[uint8ClampedTag$2] = typedArrayTags[uint16Tag$2] =
typedArrayTags[uint32Tag$2] = true;
typedArrayTags[argsTag$2] = typedArrayTags[arrayTag$2] =
typedArrayTags[arrayBufferTag$3] = typedArrayTags[boolTag$3] =
typedArrayTags[dataViewTag$3] = typedArrayTags[dateTag$3] =
typedArrayTags[errorTag$2] = typedArrayTags[funcTag$1] =
typedArrayTags[mapTag$5] = typedArrayTags[numberTag$3] =
typedArrayTags[objectTag$3] = typedArrayTags[regexpTag$3] =
typedArrayTags[setTag$5] = typedArrayTags[stringTag$4] =
typedArrayTags[weakMapTag$1] = false;
/**
* The base implementation of `_.isTypedArray` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
*/
function baseIsTypedArray(value) {
return isObjectLike(value) &&
isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
}
/**
* The base implementation of `_.unary` without support for storing metadata.
*
* @private
* @param {Function} func The function to cap arguments for.
* @returns {Function} Returns the new capped function.
*/
function baseUnary(func) {
return function(value) {
return func(value);
};
}
/** Detect free variable `exports`. */
var freeExports$1 = typeof exports == 'object' && exports && !exports.nodeType && exports;
/** Detect free variable `module`. */
var freeModule$1 = freeExports$1 && typeof module == 'object' && module && !module.nodeType && module;
/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports$1 = freeModule$1 && freeModule$1.exports === freeExports$1;
/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports$1 && freeGlobal.process;
/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
try {
// Use `util.types` for Node.js 10+.
var types = freeModule$1 && freeModule$1.require && freeModule$1.require('util').types;
if (types) {
return types;
}
// Legacy `process.binding('util')` for Node.js < 10.
return freeProcess && freeProcess.binding && freeProcess.binding('util');
} catch (e) {}
}());
/* Node.js helper references. */
var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
/**
* Checks if `value` is classified as a typed array.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
* @example
*
* _.isTypedArray(new Uint8Array);
* // => true
*
* _.isTypedArray([]);
* // => false
*/
var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
/** `Object#toString` result references. */
var mapTag$4 = '[object Map]',
setTag$4 = '[object Set]';
/** Used for built-in method references. */
var objectProto$f = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$d = objectProto$f.hasOwnProperty;
/**
* Checks if `value` is an empty object, collection, map, or set.
*
* Objects are considered empty if they have no own enumerable string keyed
* properties.
*
* Array-like values such as `arguments` objects, arrays, buffers, strings, or
* jQuery-like collections are considered empty if they have a `length` of `0`.
* Similarly, maps and sets are considered empty if they have a `size` of `0`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is empty, else `false`.
* @example
*
* _.isEmpty(null);
* // => true
*
* _.isEmpty(true);
* // => true
*
* _.isEmpty(1);
* // => true
*
* _.isEmpty([1, 2, 3]);
* // => false
*
* _.isEmpty({ 'a': 1 });
* // => false
*/
function isEmpty(value) {
if (value == null) {
return true;
}
if (isArrayLike(value) &&
(isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
isBuffer(value) || isTypedArray(value) || isArguments(value))) {
return !value.length;
}
var tag = getTag(value);
if (tag == mapTag$4 || tag == setTag$4) {
return !value.size;
}
if (isPrototype(value)) {
return !baseKeys(value).length;
}
for (var key in value) {
if (hasOwnProperty$d.call(value, key)) {
return false;
}
}
return true;
}
/**
* The base implementation of `_.times` without support for iteratee shorthands
* or max array length checks.
*
* @private
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the array of results.
*/
function baseTimes(n, iteratee) {
var index = -1,
result = Array(n);
while (++index < n) {
result[index] = iteratee(index);
}
return result;
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;
/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;
/**
* Checks if `value` is a valid array-like index.
*
* @private
* @param {*} value The value to check.
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
*/
function isIndex(value, length) {
var type = typeof value;
length = length == null ? MAX_SAFE_INTEGER : length;
return !!length &&
(type == 'number' ||
(type != 'symbol' && reIsUint.test(value))) &&
(value > -1 && value % 1 == 0 && value < length);
}
/** Used for built-in method references. */
var objectProto$e = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$c = objectProto$e.hasOwnProperty;
/**
* Creates an array of the enumerable property names of the array-like `value`.
*
* @private
* @param {*} value The value to query.
* @param {boolean} inherited Specify returning inherited property names.
* @returns {Array} Returns the array of property names.
*/
function arrayLikeKeys(value, inherited) {
var isArr = isArray(value),
isArg = !isArr && isArguments(value),
isBuff = !isArr && !isArg && isBuffer(value),
isType = !isArr && !isArg && !isBuff && isTypedArray(value),
skipIndexes = isArr || isArg || isBuff || isType,
result = skipIndexes ? baseTimes(value.length, String) : [],
length = result.length;
for (var key in value) {
if ((inherited || hasOwnProperty$c.call(value, key)) &&
!(skipIndexes && (
// Safari 9 has enumerable `arguments.length` in strict mode.
key == 'length' ||
// Node.js 0.10 has enumerable non-index properties on buffers.
(isBuff && (key == 'offset' || key == 'parent')) ||
// PhantomJS 2 has enumerable non-index properties on typed arrays.
(isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
// Skip index properties.
isIndex(key, length)
))) {
result.push(key);
}
}
return result;
}
/**
* Creates an array of the own enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects. See the
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
* for more details.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keys(new Foo);
* // => ['a', 'b'] (iteration order is not guaranteed)
*
* _.keys('hi');
* // => ['0', '1']
*/
function keys$2(object) {
return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
}
/**
* A specialized version of `_.map` for arrays without support for iteratee
* shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function arrayMap(array, iteratee) {
var index = -1,
length = array == null ? 0 : array.length,
result = Array(length);
while (++index < length) {
result[index] = iteratee(array[index], index, array);
}
return result;
}
/** `Object#toString` result references. */
var symbolTag$3 = '[object Symbol]';
/**
* Checks if `value` is classified as a `Symbol` primitive or object.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
* @example
*
* _.isSymbol(Symbol.iterator);
* // => true
*
* _.isSymbol('abc');
* // => false
*/
function isSymbol(value) {
return typeof value == 'symbol' ||
(isObjectLike(value) && baseGetTag(value) == symbolTag$3);
}
/** Used to convert symbols to primitives and strings. */
var symbolProto$2 = Symbol$1 ? Symbol$1.prototype : undefined,
symbolToString = symbolProto$2 ? symbolProto$2.toString : undefined;
/**
* The base implementation of `_.toString` which doesn't convert nullish
* values to empty strings.
*
* @private
* @param {*} value The value to process.
* @returns {string} Returns the string.
*/
function baseToString(value) {
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value;
}
if (isArray(value)) {
// Recursively convert values (susceptible to call stack limits).
return arrayMap(value, baseToString) + '';
}
if (isSymbol(value)) {
return symbolToString ? symbolToString.call(value) : '';
}
var result = (value + '');
return (result == '0' && (1 / value) == -Infinity) ? '-0' : result;
}
/**
* Converts `value` to a string. An empty string is returned for `null`
* and `undefined` values. The sign of `-0` is preserved.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.toString(null);
* // => ''
*
* _.toString(-0);
* // => '-0'
*
* _.toString([1, 2, 3]);
* // => '1,2,3'
*/
function toString$2(value) {
return value == null ? '' : baseToString(value);
}
/** Used to generate unique IDs. */
var idCounter = 0;
/**
* Generates a unique ID. If `prefix` is given, the ID is appended to it.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {string} [prefix=''] The value to prefix the ID with.
* @returns {string} Returns the unique ID.
* @example
*
* _.uniqueId('contact_');
* // => 'contact_104'
*
* _.uniqueId();
* // => '105'
*/
function uniqueId(prefix) {
var id = ++idCounter;
return toString$2(prefix) + id;
}
/** Used to match a single whitespace character. */
var reWhitespace = /\s/;
/**
* Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
* character of `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the index of the last non-whitespace character.
*/
function trimmedEndIndex(string) {
var index = string.length;
while (index-- && reWhitespace.test(string.charAt(index))) {}
return index;
}
/** Used to match leading whitespace. */
var reTrimStart = /^\s+/;
/**
* The base implementation of `_.trim`.
*
* @private
* @param {string} string The string to trim.
* @returns {string} Returns the trimmed string.
*/
function baseTrim(string) {
return string
? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '')
: string;
}
/** Used as references for various `Number` constants. */
var NAN = 0 / 0;
/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
/** Used to detect binary string values. */
var reIsBinary = /^0b[01]+$/i;
/** Used to detect octal string values. */
var reIsOctal = /^0o[0-7]+$/i;
/** Built-in method references without a dependency on `root`. */
var freeParseInt = parseInt;
/**
* Converts `value` to a number.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to process.
* @returns {number} Returns the number.
* @example
*
* _.toNumber(3.2);
* // => 3.2
*
* _.toNumber(Number.MIN_VALUE);
* // => 5e-324
*
* _.toNumber(Infinity);
* // => Infinity
*
* _.toNumber('3.2');
* // => 3.2
*/
function toNumber$1(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol(value)) {
return NAN;
}
if (isObject$1(value)) {
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
value = isObject$1(other) ? (other + '') : other;
}
if (typeof value != 'string') {
return value === 0 ? value : +value;
}
value = baseTrim(value);
var isBinary = reIsBinary.test(value);
return (isBinary || reIsOctal.test(value))
? freeParseInt(value.slice(2), isBinary ? 2 : 8)
: (reIsBadHex.test(value) ? NAN : +value);
}
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0,
MAX_INTEGER = 1.7976931348623157e+308;
/**
* Converts `value` to a finite number.
*
* @static
* @memberOf _
* @since 4.12.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted number.
* @example
*
* _.toFinite(3.2);
* // => 3.2
*
* _.toFinite(Number.MIN_VALUE);
* // => 5e-324
*
* _.toFinite(Infinity);
* // => 1.7976931348623157e+308
*
* _.toFinite('3.2');
* // => 3.2
*/
function toFinite(value) {
if (!value) {
return value === 0 ? value : 0;
}
value = toNumber$1(value);
if (value === INFINITY || value === -INFINITY) {
var sign = (value < 0 ? -1 : 1);
return sign * MAX_INTEGER;
}
return value === value ? value : 0;
}
/**
* Converts `value` to an integer.
*
* **Note:** This method is loosely based on
* [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toInteger(3.2);
* // => 3
*
* _.toInteger(Number.MIN_VALUE);
* // => 0
*
* _.toInteger(Infinity);
* // => 1.7976931348623157e+308
*
* _.toInteger('3.2');
* // => 3
*/
function toInteger(value) {
var result = toFinite(value),
remainder = result % 1;
return result === result ? (remainder ? result - remainder : result) : 0;
}
/** Error message constants. */
var FUNC_ERROR_TEXT$3 = 'Expected a function';
/**
* Creates a function that invokes `func`, with the `this` binding and arguments
* of the created function, while it's called less than `n` times. Subsequent
* calls to the created function return the result of the last `func` invocation.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {number} n The number of calls at which `func` is no longer invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* jQuery(element).on('click', _.before(5, addContactToList));
* // => Allows adding up to 4 contacts to the list.
*/
function before(n, func) {
var result;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$3);
}
n = toInteger(n);
return function() {
if (--n > 0) {
result = func.apply(this, arguments);
}
if (n <= 1) {
func = undefined;
}
return result;
};
}
/**
* Creates a function that is restricted to invoking `func` once. Repeat calls
* to the function return the value of the first invocation. The `func` is
* invoked with the `this` binding and arguments of the created function.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* var initialize = _.once(createApplication);
* initialize();
* initialize();
* // => `createApplication` is invoked once
*/
function once(func) {
return before(2, func);
}
// Regular expression used to split event strings.
const eventSplitter = /\s+/;
/**
* Iterates over the standard `event, callback` (as well as the fancy multiple
* space-separated events `"change blur", callback` and jQuery-style event
* maps `{event: callback}`).
*/
function eventsApi(iteratee, events, name, callback, opts) {
let i = 0;
let names;
if (name && typeof name === 'object') {
// Handle event maps.
if (callback !== undefined && 'context' in opts && opts.context === undefined) {
opts.context = callback;
}
for (names = Object.keys(name); i < names.length; i++) {
events = eventsApi(iteratee, events, names[i], name[names[i]], opts);
}
}
else if (name && typeof name === 'string' && eventSplitter.test(name)) {
// Handle space-separated event names by delegating them individually.
for (names = name.split(eventSplitter); i < names.length; i++) {
const result = iteratee(events, names[i], callback, opts);
if (result !== undefined) {
events = result;
}
}
}
else {
// Finally, standard events.
events = iteratee(events, name, callback, opts);
}
return events;
}
/**
* A reducer that adds a callback to the `events` object.
*/
function onApi(events, name, callback, options) {
if (callback) {
const handlers = events[name] || (events[name] = []);
const context = options.context;
const ctx = options.ctx;
const listening = options.listening;
if (listening)
listening.count++;
handlers.push({ callback, context, ctx: context || ctx, listening });
}
return events;
}
/**
* An try-catch guarded #on function, to prevent poisoning the global
* `_listening` variable.
*/
function tryCatchOn(obj, name, callback, context) {
try {
obj.on(name, callback, context);
}
catch (e) {
return e;
}
}
/**
* The reducing API that removes a callback from the `events` object.
*/
function offApi(events, name, callback, options) {
if (!events)
return;
const context = options.context;
const listeners = options.listeners;
let i = 0;
let names;
// Delete all event listeners and "drop" events.
if (!name && !context && !callback) {
if (listeners) {
for (names = Object.keys(listeners); i < names.length; i++) {
listeners[names[i]].cleanup();
}
}
return;
}
names = name ? [name] : Object.keys(events);
for (; i < names.length; i++) {
const currentName = names[i];
const handlers = events[currentName];
// Bail out if there are no events stored.
if (!handlers) {
continue;
}
// Find any remaining events.
const remaining = [];
for (let j = 0; j < handlers.length; j++) {
const handler = handlers[j];
if ((callback && callback !== handler.callback && callback !== handler.callback._callback) ||
(context && context !== handler.context)) {
remaining.push(handler);
}
else {
const listening = handler.listening;
if (listening)
listening.stop(currentName, callback);
}
}
// Replace events if there are any remaining. Otherwise, clean up.
if (remaining.length) {
events[currentName] = remaining;
}
else {
delete events[currentName];
}
}
return events;
}
/**
* Reduces the event callbacks into a map of `{event: onceWrapper}`.
* `offer` unbinds the `onceWrapper` after it has been called.
*/
function onceMap(map, name, callback, offer) {
if (callback) {
const _once = once(function (...args) {
offer(name, _once);
callback.apply(this, args);
});
map[name] = _once;
_once._callback = callback;
}
return map;
}
/** Handles triggering the appropriate event callbacks. */
function triggerApi(objEvents, name, _callback, args) {
if (objEvents) {
const events = objEvents[name];
let allEvents = objEvents.all;
if (events && allEvents)
allEvents = allEvents.slice();
if (events)
triggerEvents(events, args);
if (allEvents)
triggerEvents(allEvents, [name].concat(args));
}
return objEvents;
}
/**
* A difficult-to-believe, but optimized internal dispatch function for
* triggering events. Tries to keep the usual cases speedy (most internal
* Backbone events have 3 arguments).
*/
function triggerEvents(events, args) {
let ev;
let i = -1;
const l = events.length;
const a1 = args[0];
const a2 = args[1];
const a3 = args[2];
switch (args.length) {
case 0:
while (++i < l)
(ev = events[i]).callback.call(ev.ctx);
return;
case 1:
while (++i < l)
(ev = events[i]).callback.call(ev.ctx, a1);
return;
case 2:
while (++i < l)
(ev = events[i]).callback.call(ev.ctx, a1, a2);
return;
case 3:
while (++i < l)
(ev = events[i]).callback.call(ev.ctx, a1, a2, a3);
return;
default:
while (++i < l)
(ev = events[i]).callback.apply(ev.ctx, args);
return;
}
}
/**
* A listening class that tracks and cleans up memory bindings
* when all callbacks have been offed.
*/
class Listening {
constructor(listener, obj) {
this.id = listener._listenId;
this.listener = listener;
this.obj = obj;
this.interop = true;
this.count = 0;
this._events = undefined;
}
start(name, callback, context, _listening) {
const options = {
context: this.obj,
ctx: context,
listening: _listening,
};
this._events = eventsApi(onApi, this._events || {}, name, callback, options);
if (_listening) {
const listeners = this.obj._listeners || (this.obj._listeners = {});
listeners[this.id] = this;
// Allow the listening to use a counter, instead of tracking
// callbacks for library interop
this.interop = false;
}
return this;
}
/**
* Stop's listening to a callback (or several).
* Uses an optimized counter if the listenee uses Backbone.Events.
* Otherwise, falls back to manual tracking to support events
* library interop.
*/
stop(name, callback) {
let cleanup;
if (this.interop) {
this._events = eventsApi(offApi, this._events, name, callback, {
context: undefined,
listeners: undefined,
});
cleanup = !this._events;
}
else {
this.count--;
cleanup = this.count === 0;
}
if (cleanup)
this.cleanup();
}
/**
* Cleans up memory bindings between the listener and the listenee.
*/
cleanup() {
if (this.listener._listeningTo) {
delete this.listener._listeningTo[this.obj._listenId];
}
if (!this.interop && this.obj._listeners) {
delete this.obj._listeners[this.id];
}
}
}
/**
* @copyright 2010-2019 Jeremy Ashkenas and DocumentCloud
* @copyright 2023 JC Brand
*/
// A private global variable to share between listeners and listenees.
let _listening;
/**
* @public
*/
function EventEmitter(Base) {
return class EventEmitter extends Base {
/**
* Bind an event to a `callback` function. Passing `"all"` will bind
* the callback to all events fired.
*/
on(name, callback, context) {
this._events = eventsApi(onApi, this._events || {}, name, callback, {
context: context,
ctx: this,
listening: _listening,
});
if (_listening) {
const listeners = this._listeners || (this._listeners = {});
listeners[_listening.id] = _listening;
// Allow the listening to use a counter, instead of tracking
// callbacks for library interop
_listening.interop = false;
}
return this;
}
/**
* Inversion-of-control versions of `on`. Tell *this* object to listen to
* an event in another object... keeping track of what it's listening to
* for easier unbinding later.
*/
listenTo(obj, name, callback) {
if (!obj)
return this;
const id = obj._listenId || (obj._listenId = uniqueId('l'));
const listeningTo = this._listeningTo || (this._listeningTo = {});
let listening = (_listening = listeningTo[id]);
// This object is not listening to any other events on `obj` yet.
// Setup the necessary references to track the listening callbacks.
if (!listening) {
this._listenId || (this._listenId = uniqueId('l'));
listening = _listening = listeningTo[id] = new Listening(this, obj);
}
// Bind callbacks on obj.
const error = tryCatchOn(obj, name, callback, this);
_listening = undefined;
if (error)
throw error;
// If the target obj is not Backbone.Events, track events manually.
if (listening.interop)
listening.start(name, callback, this, _listening);
return this;
}
/**
* Remove one or many callbacks. If `context` is null, removes all
* callbacks with that function. If `callback` is null, removes all
* callbacks for the event. If `name` is null, removes all bound
* callbacks for all events.
*/
off(name, callback, context) {
if (!this._events)
return this;
this._events = eventsApi(offApi, this._events, name, callback, {
context: context,
listeners: this._listeners,
});
return this;
}
/**
* Tell this object to stop listening to either specific events ... or
* to every object it's currently listening to.
*/
stopListening(obj, name, callback) {
const listeningTo = this._listeningTo;
if (!listeningTo)
return this;
const ids = obj ? [obj._listenId] : keys$2(listeningTo);
for (let i = 0; i < ids.length; i++) {
const listening = listeningTo[ids[i]];
// If listening doesn't exist, this object is not currently
// listening to obj. Break out early.
if (!listening)
break;
listening.obj.off(name, callback, this);
if (listening.interop)
listening.stop(name, callback);
}
if (isEmpty(listeningTo))
this._listeningTo = undefined;
return this;
}
/**
* Bind an event to only be triggered a single time. After the first time
* the callback is invoked, its listener will be removed. If multiple events
* are passed in using the space-separated syntax, the handler will fire
* once for each event, not once for a combination of all events.
*/
once(name, callback, context) {
// Map the event into a `{event: once}` object.
const events = eventsApi(onceMap, {}, name, callback, this.off.bind(this));
if (typeof name === 'string' && (context === null || context === undefined))
callback = undefined;
return this.on(events, callback, context);
}
/**
* Inversion-of-control versions of `once`.
*/
listenToOnce(obj, name, callback) {
// Map the event into a `{event: once}` object.
const events = eventsApi(onceMap, {}, name, callback, this.stopListening.bind(this, obj));
return this.listenTo(obj, events);
}
/**
* Trigger one or many events, firing all bound callbacks. Callbacks are
* passed the same arguments as `trigger` is, apart from the event name
* (unless you're listening on `"all"`, which will cause your callback to
* receive the true name of the event as the first argument).
*/
trigger(name, ...args) {
if (!this._events)
return this;
eventsApi(triggerApi, this._events, name, undefined, args);
return this;
}
};