1 | var Stack = require('./_Stack'),
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2 | arrayEach = require('./_arrayEach'),
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3 | assignValue = require('./_assignValue'),
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4 | baseAssign = require('./_baseAssign'),
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5 | baseAssignIn = require('./_baseAssignIn'),
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6 | cloneBuffer = require('./_cloneBuffer'),
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7 | copyArray = require('./_copyArray'),
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8 | copySymbols = require('./_copySymbols'),
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9 | copySymbolsIn = require('./_copySymbolsIn'),
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10 | getAllKeys = require('./_getAllKeys'),
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11 | getAllKeysIn = require('./_getAllKeysIn'),
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12 | getTag = require('./_getTag'),
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13 | initCloneArray = require('./_initCloneArray'),
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14 | initCloneByTag = require('./_initCloneByTag'),
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15 | initCloneObject = require('./_initCloneObject'),
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16 | isArray = require('./isArray'),
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17 | isBuffer = require('./isBuffer'),
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18 | isMap = require('./isMap'),
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19 | isObject = require('./isObject'),
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20 | isSet = require('./isSet'),
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21 | keys = require('./keys');
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22 |
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23 |
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24 | var CLONE_DEEP_FLAG = 1,
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25 | CLONE_FLAT_FLAG = 2,
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26 | CLONE_SYMBOLS_FLAG = 4;
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27 |
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28 |
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29 | var argsTag = '[object Arguments]',
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30 | arrayTag = '[object Array]',
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31 | boolTag = '[object Boolean]',
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32 | dateTag = '[object Date]',
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33 | errorTag = '[object Error]',
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34 | funcTag = '[object Function]',
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35 | genTag = '[object GeneratorFunction]',
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36 | mapTag = '[object Map]',
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37 | numberTag = '[object Number]',
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38 | objectTag = '[object Object]',
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39 | regexpTag = '[object RegExp]',
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40 | setTag = '[object Set]',
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41 | stringTag = '[object String]',
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42 | symbolTag = '[object Symbol]',
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43 | weakMapTag = '[object WeakMap]';
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44 |
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45 | var arrayBufferTag = '[object ArrayBuffer]',
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46 | dataViewTag = '[object DataView]',
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47 | float32Tag = '[object Float32Array]',
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48 | float64Tag = '[object Float64Array]',
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49 | int8Tag = '[object Int8Array]',
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50 | int16Tag = '[object Int16Array]',
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51 | int32Tag = '[object Int32Array]',
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52 | uint8Tag = '[object Uint8Array]',
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53 | uint8ClampedTag = '[object Uint8ClampedArray]',
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54 | uint16Tag = '[object Uint16Array]',
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55 | uint32Tag = '[object Uint32Array]';
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56 |
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57 |
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58 | var cloneableTags = {};
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59 | cloneableTags[argsTag] = cloneableTags[arrayTag] =
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60 | cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
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61 | cloneableTags[boolTag] = cloneableTags[dateTag] =
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62 | cloneableTags[float32Tag] = cloneableTags[float64Tag] =
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63 | cloneableTags[int8Tag] = cloneableTags[int16Tag] =
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64 | cloneableTags[int32Tag] = cloneableTags[mapTag] =
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65 | cloneableTags[numberTag] = cloneableTags[objectTag] =
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66 | cloneableTags[regexpTag] = cloneableTags[setTag] =
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67 | cloneableTags[stringTag] = cloneableTags[symbolTag] =
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68 | cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
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69 | cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
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70 | cloneableTags[errorTag] = cloneableTags[funcTag] =
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71 | cloneableTags[weakMapTag] = false;
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72 |
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73 |
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74 |
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75 |
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76 |
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77 |
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78 |
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79 |
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80 |
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81 |
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82 |
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83 |
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84 |
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85 |
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86 |
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87 |
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88 |
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89 | function baseClone(value, bitmask, customizer, key, object, stack) {
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90 | var result,
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91 | isDeep = bitmask & CLONE_DEEP_FLAG,
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92 | isFlat = bitmask & CLONE_FLAT_FLAG,
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93 | isFull = bitmask & CLONE_SYMBOLS_FLAG;
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94 |
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95 | if (customizer) {
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96 | result = object ? customizer(value, key, object, stack) : customizer(value);
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97 | }
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98 | if (result !== undefined) {
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99 | return result;
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100 | }
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101 | if (!isObject(value)) {
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102 | return value;
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103 | }
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104 | var isArr = isArray(value);
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105 | if (isArr) {
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106 | result = initCloneArray(value);
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107 | if (!isDeep) {
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108 | return copyArray(value, result);
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109 | }
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110 | } else {
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111 | var tag = getTag(value),
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112 | isFunc = tag == funcTag || tag == genTag;
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113 |
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114 | if (isBuffer(value)) {
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115 | return cloneBuffer(value, isDeep);
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116 | }
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117 | if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
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118 | result = (isFlat || isFunc) ? {} : initCloneObject(value);
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119 | if (!isDeep) {
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120 | return isFlat
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121 | ? copySymbolsIn(value, baseAssignIn(result, value))
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122 | : copySymbols(value, baseAssign(result, value));
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123 | }
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124 | } else {
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125 | if (!cloneableTags[tag]) {
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126 | return object ? value : {};
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127 | }
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128 | result = initCloneByTag(value, tag, isDeep);
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129 | }
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130 | }
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131 |
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132 | stack || (stack = new Stack);
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133 | var stacked = stack.get(value);
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134 | if (stacked) {
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135 | return stacked;
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136 | }
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137 | stack.set(value, result);
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138 |
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139 | if (isSet(value)) {
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140 | value.forEach(function(subValue) {
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141 | result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
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142 | });
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143 | } else if (isMap(value)) {
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144 | value.forEach(function(subValue, key) {
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145 | result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
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146 | });
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147 | }
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148 |
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149 | var keysFunc = isFull
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150 | ? (isFlat ? getAllKeysIn : getAllKeys)
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151 | : (isFlat ? keysIn : keys);
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152 |
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153 | var props = isArr ? undefined : keysFunc(value);
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154 | arrayEach(props || value, function(subValue, key) {
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155 | if (props) {
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156 | key = subValue;
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157 | subValue = value[key];
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158 | }
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159 |
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160 | assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
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161 | });
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162 | return result;
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163 | }
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164 |
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165 | module.exports = baseClone;
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