1 | let Browsers = require('./browsers')
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2 | let vendor = require('./vendor')
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3 | let utils = require('./utils')
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4 |
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5 |
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6 |
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7 |
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8 | function clone(obj, parent) {
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9 | let cloned = new obj.constructor()
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10 |
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11 | for (let i of Object.keys(obj || {})) {
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12 | let value = obj[i]
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13 | if (i === 'parent' && typeof value === 'object') {
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14 | if (parent) {
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15 | cloned[i] = parent
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16 | }
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17 | } else if (i === 'source' || i === null) {
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18 | cloned[i] = value
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19 | } else if (Array.isArray(value)) {
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20 | cloned[i] = value.map(x => clone(x, cloned))
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21 | } else if (
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22 | i !== '_autoprefixerPrefix' &&
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23 | i !== '_autoprefixerValues' &&
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24 | i !== 'proxyCache'
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25 | ) {
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26 | if (typeof value === 'object' && value !== null) {
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27 | value = clone(value, cloned)
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28 | }
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29 | cloned[i] = value
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30 | }
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31 | }
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32 |
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33 | return cloned
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34 | }
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35 |
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36 | class Prefixer {
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37 | |
38 |
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39 |
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40 | static hack(klass) {
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41 | if (!this.hacks) {
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42 | this.hacks = {}
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43 | }
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44 | return klass.names.map(name => {
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45 | this.hacks[name] = klass
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46 | return this.hacks[name]
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47 | })
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48 | }
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49 |
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50 | |
51 |
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52 |
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53 | static load(name, prefixes, all) {
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54 | let Klass = this.hacks && this.hacks[name]
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55 | if (Klass) {
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56 | return new Klass(name, prefixes, all)
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57 | } else {
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58 | return new this(name, prefixes, all)
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59 | }
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60 | }
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61 |
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62 | |
63 |
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64 |
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65 | static clone(node, overrides) {
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66 | let cloned = clone(node)
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67 | for (let name in overrides) {
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68 | cloned[name] = overrides[name]
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69 | }
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70 | return cloned
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71 | }
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72 |
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73 | constructor(name, prefixes, all) {
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74 | this.prefixes = prefixes
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75 | this.name = name
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76 | this.all = all
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77 | }
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78 |
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79 | |
80 |
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81 |
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82 | parentPrefix(node) {
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83 | let prefix
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84 |
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85 | if (typeof node._autoprefixerPrefix !== 'undefined') {
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86 | prefix = node._autoprefixerPrefix
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87 | } else if (node.type === 'decl' && node.prop[0] === '-') {
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88 | prefix = vendor.prefix(node.prop)
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89 | } else if (node.type === 'root') {
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90 | prefix = false
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91 | } else if (
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92 | node.type === 'rule' &&
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93 | node.selector.includes(':-') &&
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94 | /:(-\w+-)/.test(node.selector)
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95 | ) {
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96 | prefix = node.selector.match(/:(-\w+-)/)[1]
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97 | } else if (node.type === 'atrule' && node.name[0] === '-') {
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98 | prefix = vendor.prefix(node.name)
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99 | } else {
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100 | prefix = this.parentPrefix(node.parent)
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101 | }
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102 |
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103 | if (!Browsers.prefixes().includes(prefix)) {
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104 | prefix = false
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105 | }
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106 |
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107 | node._autoprefixerPrefix = prefix
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108 |
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109 | return node._autoprefixerPrefix
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110 | }
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111 |
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112 | |
113 |
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114 |
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115 | process(node, result) {
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116 | if (!this.check(node)) {
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117 | return undefined
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118 | }
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119 |
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120 | let parent = this.parentPrefix(node)
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121 |
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122 | let prefixes = this.prefixes.filter(
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123 | prefix => !parent || parent === utils.removeNote(prefix)
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124 | )
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125 |
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126 | let added = []
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127 | for (let prefix of prefixes) {
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128 | if (this.add(node, prefix, added.concat([prefix]), result)) {
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129 | added.push(prefix)
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130 | }
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131 | }
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132 |
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133 | return added
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134 | }
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135 |
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136 | |
137 |
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138 |
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139 | clone(node, overrides) {
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140 | return Prefixer.clone(node, overrides)
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141 | }
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142 | }
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143 |
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144 | module.exports = Prefixer
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