1 | 'use strict';
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2 |
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3 | var utils = require('./utils');
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4 |
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5 | module.exports = function(braces) {
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6 | braces.compiler
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7 |
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8 | |
9 |
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10 |
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11 |
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12 | .set('bos', function() {
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13 | this.ast.queue = isEscaped(this.ast) ? [this.ast.val] : [];
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14 | this.ast.count = 1;
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15 | })
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16 |
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17 | |
18 |
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19 |
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20 |
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21 | .set('bracket', function(node) {
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22 | var close = node.close;
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23 | var open = !node.escaped ? '[' : '\\[';
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24 | var negated = node.negated;
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25 | var inner = node.inner;
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26 |
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27 | inner = inner.replace(/\\(?=[\\\w]|$)/g, '\\\\');
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28 | if (inner === ']-') {
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29 | inner = '\\]\\-';
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30 | }
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31 |
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32 | if (negated && inner.indexOf('.') === -1) {
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33 | inner += '.';
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34 | }
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35 | if (negated && inner.indexOf('/') === -1) {
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36 | inner += '/';
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37 | }
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38 |
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39 | var val = open + negated + inner + close;
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40 | var queue = node.parent.queue;
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41 | var last = utils.arrayify(queue.pop());
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42 |
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43 | queue.push(utils.join(last, val));
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44 | queue.push.apply(queue, []);
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45 | })
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46 |
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47 | |
48 |
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49 |
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50 |
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51 | .set('brace', function(node) {
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52 | node.queue = isEscaped(node) ? [node.val] : [];
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53 | node.count = 1;
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54 | return this.mapVisit(node.nodes);
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55 | })
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56 |
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57 | |
58 |
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59 |
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60 |
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61 | .set('brace.open', function(node) {
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62 | node.parent.open = node.val;
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63 | })
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64 |
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65 | |
66 |
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67 |
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68 |
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69 | .set('text', function(node) {
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70 | var queue = node.parent.queue;
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71 | var segs = [node.val];
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72 | var escaped = node.escaped;
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73 |
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74 | if (node.multiplier > 1) {
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75 | node.parent.count *= node.multiplier;
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76 | }
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77 |
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78 | if (this.options.quantifiers === true && /^(\d,\d|,\d|\d,)$/.test(node.val)) {
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79 | escaped = true;
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80 |
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81 | } else if (node.val.length > 1) {
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82 | if (isType(node.parent, 'brace') && !isEscaped(node)) {
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83 | var expanded = utils.expand(node.val, this.options);
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84 | segs = expanded.segs;
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85 |
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86 | if (expanded.isOptimized) {
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87 | node.parent.isOptimized = true;
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88 | }
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89 |
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90 |
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91 | if (!segs.length) {
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92 | var val = (expanded.val || node.val)
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93 |
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94 | .replace(/\\([,.])/g, '$1')
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95 |
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96 | .replace(/["']/g, '');
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97 |
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98 | segs = [val];
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99 | escaped = true;
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100 | }
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101 | }
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102 |
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103 | } else if (node.val === ',') {
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104 | if (this.options.expand) {
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105 | node.parent.queue.push([]);
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106 | segs = [''];
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107 | } else {
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108 | segs = ['|'];
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109 | }
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110 | } else {
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111 | escaped = true;
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112 | }
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113 |
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114 | if (escaped && isType(node.parent, 'brace')) {
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115 | if (node.parent.nodes.length <= 4 && node.parent.count === 1) {
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116 | node.parent.escaped = true;
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117 | } else if (node.parent.length <= 3) {
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118 | node.parent.escaped = true;
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119 | }
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120 | }
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121 |
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122 | if (!hasQueue(node.parent)) {
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123 | node.parent.queue = segs;
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124 | return;
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125 | }
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126 |
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127 | var last = utils.arrayify(queue.pop());
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128 | if (node.parent.count > 1 && this.options.expand) {
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129 | last = multiply(last, node.parent.count);
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130 | node.parent.count = 1;
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131 | }
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132 |
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133 | var temp = utils.join(utils.flatten(last), segs.shift());
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134 | queue.push(temp);
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135 | queue.push.apply(queue, segs);
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136 | })
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137 |
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138 | |
139 |
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140 |
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141 |
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142 | .set('brace.close', function(node) {
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143 | var queue = node.parent.queue;
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144 | var prev = node.parent.parent;
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145 | var last = prev.queue.pop();
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146 | var open = node.parent.open;
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147 | var close = node.val;
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148 |
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149 | if (open && close && isOptimized(node, this.options)) {
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150 | open = '(';
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151 | close = ')';
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152 | }
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153 |
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154 |
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155 |
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156 | var ele = utils.last(queue);
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157 | if (node.parent.count > 1 && this.options.expand) {
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158 | ele = multiply(queue.pop(), node.parent.count);
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159 | node.parent.count = 1;
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160 | queue.push(ele);
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161 | }
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162 |
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163 | if (close && typeof ele === 'string' && ele.length === 1) {
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164 | open = '';
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165 | close = '';
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166 | }
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167 |
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168 | if (isLiteralBrace(node, this.options) || noInner(node)) {
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169 | queue.push(utils.join(open, queue.pop() || ''));
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170 | queue = utils.flatten(utils.join(queue, close));
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171 | }
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172 |
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173 | var arr = utils.flatten(utils.join(last, queue));
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174 | prev.queue.push(arr);
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175 | })
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176 |
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177 | |
178 |
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179 |
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180 |
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181 | .set('eos', function(node) {
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182 | if (this.options.optimize !== false) {
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183 | this.output = utils.last(utils.flatten(this.ast.queue));
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184 | } else if (Array.isArray(utils.last(this.ast.queue))) {
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185 | this.output = utils.flatten(this.ast.queue.pop());
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186 | } else {
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187 | this.output = utils.flatten(this.ast.queue);
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188 | }
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189 |
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190 | if (node.parent.count > 1 && this.options.expand) {
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191 | this.output = multiply(this.output, node.parent.count);
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192 | }
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193 |
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194 | this.output = utils.arrayify(this.output);
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195 | });
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196 |
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197 | };
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198 |
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199 |
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200 |
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201 |
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202 |
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203 | function multiply(queue, n, options) {
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204 | return utils.flatten(utils.repeat(utils.arrayify(queue), n));
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205 | }
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206 |
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207 |
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208 |
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209 |
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210 |
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211 | function isEscaped(node) {
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212 | return node.escaped === true;
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213 | }
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214 |
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215 |
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216 |
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217 |
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218 |
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219 |
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220 |
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221 |
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222 | function isOptimized(node, options) {
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223 | if (node.parent.isOptimized) return true;
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224 | return isType(node.parent, 'brace')
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225 | && !isEscaped(node.parent)
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226 | && options.expand !== true;
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227 | }
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228 |
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229 |
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230 |
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231 |
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232 |
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233 |
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234 | function isLiteralBrace(node, options) {
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235 | return isEscaped(node.parent) || options.optimize !== false;
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236 | }
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237 |
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238 |
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239 |
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240 |
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241 |
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242 |
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243 | function noInner(node, type) {
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244 | if (node.parent.queue.length === 1) {
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245 | return true;
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246 | }
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247 | var nodes = node.parent.nodes;
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248 | return nodes.length === 3
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249 | && isType(nodes[0], 'brace.open')
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250 | && !isType(nodes[1], 'text')
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251 | && isType(nodes[2], 'brace.close');
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252 | }
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253 |
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254 |
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255 |
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256 |
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257 |
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258 |
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259 | function isType(node, type) {
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260 | return typeof node !== 'undefined' && node.type === type;
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261 | }
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262 |
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263 |
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264 |
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265 |
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266 |
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267 |
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268 | function hasQueue(node) {
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269 | return Array.isArray(node.queue) && node.queue.length;
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270 | }
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