110 lines
3.7 KiB
JavaScript
110 lines
3.7 KiB
JavaScript
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/**
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* Underscore mixins for deep objects
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*
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* Based on https://gist.github.com/echong/3861963
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*/
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(function() {
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var arrays, basicObjects, deepClone, deepExtend, deepExtendCouple, isBasicObject,
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__slice = [].slice;
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deepClone = function(obj) {
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var func, isArr;
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if (!_.isObject(obj) || _.isFunction(obj)) {
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return obj;
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}
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if (obj instanceof Backbone.Collection || obj instanceof Backbone.Model) {
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return obj;
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}
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if (_.isDate(obj)) {
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return new Date(obj.getTime());
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}
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if (_.isRegExp(obj)) {
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return new RegExp(obj.source, obj.toString().replace(/.*\//, ""));
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}
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isArr = _.isArray(obj || _.isArguments(obj));
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func = function(memo, value, key) {
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if (isArr) {
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memo.push(deepClone(value));
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} else {
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memo[key] = deepClone(value);
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}
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return memo;
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};
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return _.reduce(obj, func, isArr ? [] : {});
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};
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isBasicObject = function(object) {
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if (object == null) return false;
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return (object.prototype === {}.prototype || object.prototype === Object.prototype) && _.isObject(object) && !_.isArray(object) && !_.isFunction(object) && !_.isDate(object) && !_.isRegExp(object) && !_.isArguments(object);
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};
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basicObjects = function(object) {
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return _.filter(_.keys(object), function(key) {
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return isBasicObject(object[key]);
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});
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};
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arrays = function(object) {
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return _.filter(_.keys(object), function(key) {
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return _.isArray(object[key]);
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});
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};
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deepExtendCouple = function(destination, source, maxDepth) {
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var combine, recurse, sharedArrayKey, sharedArrayKeys, sharedObjectKey, sharedObjectKeys, _i, _j, _len, _len1;
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if (maxDepth == null) {
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maxDepth = 20;
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}
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if (maxDepth <= 0) {
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console.warn('_.deepExtend(): Maximum depth of recursion hit.');
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return _.extend(destination, source);
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}
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sharedObjectKeys = _.intersection(basicObjects(destination), basicObjects(source));
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recurse = function(key) {
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return source[key] = deepExtendCouple(destination[key], source[key], maxDepth - 1);
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};
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for (_i = 0, _len = sharedObjectKeys.length; _i < _len; _i++) {
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sharedObjectKey = sharedObjectKeys[_i];
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recurse(sharedObjectKey);
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}
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sharedArrayKeys = _.intersection(arrays(destination), arrays(source));
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combine = function(key) {
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return source[key] = _.union(destination[key], source[key]);
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};
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for (_j = 0, _len1 = sharedArrayKeys.length; _j < _len1; _j++) {
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sharedArrayKey = sharedArrayKeys[_j];
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combine(sharedArrayKey);
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}
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return _.extend(destination, source);
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};
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deepExtend = function() {
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var finalObj, maxDepth, objects, _i;
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objects = 2 <= arguments.length ? __slice.call(arguments, 0, _i = arguments.length - 1) : (_i = 0, []), maxDepth = arguments[_i++];
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if (!_.isNumber(maxDepth)) {
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objects.push(maxDepth);
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maxDepth = 20;
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}
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if (objects.length <= 1) {
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return objects[0];
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}
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if (maxDepth <= 0) {
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return _.extend.apply(this, objects);
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}
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finalObj = objects.shift();
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while (objects.length > 0) {
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finalObj = deepExtendCouple(finalObj, deepClone(objects.shift()), maxDepth);
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}
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return finalObj;
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};
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_.mixin({
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deepClone: deepClone,
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isBasicObject: isBasicObject,
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basicObjects: basicObjects,
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arrays: arrays,
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deepExtend: deepExtend
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});
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}).call(this);
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