1 |
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2 |
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3 |
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4 | !function(exports) {
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5 | var pointerCache = {}
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6 | , hasOwn = pointerCache.hasOwnProperty
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7 |
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8 | exports.clone = clone
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9 | exports.mergePatch = mergePatch
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10 | exports.isObject = isObject
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11 |
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12 | |
13 |
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14 |
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15 |
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16 |
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17 | function mergePatch(target, patch, changed, previous, pointer) {
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18 | var undef, key, oldVal, val, len, nextPointer
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19 | if (isObject(patch)) {
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20 | if (!pointer) {
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21 | pointer = ""
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22 | }
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23 | if (!isObject(target)) {
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24 | target = {}
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25 | }
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26 | for (key in patch) if (
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27 | undef !== (oldVal = target[key], val = patch[key]) &&
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28 | hasOwn.call(patch, key) &&
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29 | (
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30 | undef == val ?
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31 | undef !== oldVal && delete target[key] :
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32 | target[key] !== val
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33 | )
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34 | ) {
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35 | nextPointer = pointer + "/" + key.replace(/~/g, "~0").replace(/\//g, "~1")
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36 | len = changed && isObject(target[key]) && changed.length
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37 | if (undef != val) {
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38 | target[key] = mergePatch(target[key], val, changed, previous, nextPointer)
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39 | }
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40 | if (len === false || changed && len != changed.length) {
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41 | changed.push(nextPointer)
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42 | if (previous && !isObject(oldVal)) {
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43 | previous[nextPointer] = oldVal
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44 | }
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45 | }
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46 | }
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47 | } else {
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48 | if (changed && isObject(target)) {
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49 | val = {}
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50 | for (key in target) if (hasOwn.call(target, key)) {
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51 | val[key] = null
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52 | }
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53 | mergePatch(target, val, changed, previous, pointer)
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54 | }
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55 | target = patch
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56 | }
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57 | return target
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58 | }
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59 |
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60 | function clone(obj) {
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61 | var temp, key
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62 | if (obj && typeof obj == "object") {
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63 |
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64 | temp = obj instanceof Date ? new Date(+obj) :
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65 | obj instanceof RegExp ? RegExp(obj.source, (""+obj).split("/").pop()) :
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66 | obj.constructor()
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67 | for (key in obj) if (hasOwn.call(obj, key)) {
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68 | temp[key] = clone(obj[key])
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69 | }
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70 | obj = temp
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71 | }
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72 | return obj
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73 | }
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74 |
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75 | function isObject(obj) {
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76 | return !!obj && obj.constructor === Object
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77 | }
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78 |
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79 |
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80 | }(this.JSON || this)
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81 |
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82 |
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