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1 /* https://github.com/alexei/sprintf.js/blob/master/src/sprintf.js */ |
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2 /* global window, exports, define */ |
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3 |
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4 !function() { |
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5 'use strict' |
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6 |
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7 var re = { |
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8 not_string: /[^s]/, |
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9 not_bool: /[^t]/, |
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10 not_type: /[^T]/, |
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11 not_primitive: /[^v]/, |
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12 number: /[diefg]/, |
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13 numeric_arg: /[bcdiefguxX]/, |
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14 json: /[j]/, |
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15 not_json: /[^j]/, |
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16 text: /^[^\x25]+/, |
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17 modulo: /^\x25{2}/, |
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18 placeholder: /^\x25(?:([1-9]\d*)\$|\(([^)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-gijostTuvxX])/, |
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19 key: /^([a-z_][a-z_\d]*)/i, |
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20 key_access: /^\.([a-z_][a-z_\d]*)/i, |
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21 index_access: /^\[(\d+)\]/, |
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22 sign: /^[+-]/ |
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23 } |
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24 |
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25 function sprintf(key) { |
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26 // arguments is not an array, but should be fine for this call |
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27 return sprintf_format(sprintf_parse(key), arguments) |
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28 } |
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29 |
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30 function vsprintf(fmt, argv) { |
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31 return sprintf.apply(null, [fmt].concat(argv || [])) |
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32 } |
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33 |
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34 function sprintf_format(parse_tree, argv) { |
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35 var cursor = 1, tree_length = parse_tree.length, arg, output = '', i, k, ph, pad, pad_character, pad_length, is_positive, sign |
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36 for (i = 0; i < tree_length; i++) { |
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37 if (typeof parse_tree[i] === 'string') { |
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38 output += parse_tree[i] |
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39 } |
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40 else if (typeof parse_tree[i] === 'object') { |
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41 ph = parse_tree[i] // convenience purposes only |
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42 if (ph.keys) { // keyword argument |
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43 arg = argv[cursor] |
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44 for (k = 0; k < ph.keys.length; k++) { |
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45 if (arg == undefined) { |
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46 throw new Error(sprintf('[sprintf] Cannot access property "%s" of undefined value "%s"', ph.keys[k], ph.keys[k-1])) |
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47 } |
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48 arg = arg[ph.keys[k]] |
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49 } |
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50 } |
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51 else if (ph.param_no) { // positional argument (explicit) |
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52 arg = argv[ph.param_no] |
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53 } |
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54 else { // positional argument (implicit) |
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55 arg = argv[cursor++] |
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56 } |
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57 |
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58 if (re.not_type.test(ph.type) && re.not_primitive.test(ph.type) && arg instanceof Function) { |
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59 arg = arg() |
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60 } |
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61 |
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62 if (re.numeric_arg.test(ph.type) && (typeof arg !== 'number' && isNaN(arg))) { |
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63 throw new TypeError(sprintf('[sprintf] expecting number but found %T', arg)) |
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64 } |
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65 |
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66 if (re.number.test(ph.type)) { |
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67 is_positive = arg >= 0 |
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68 } |
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69 |
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70 switch (ph.type) { |
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71 case 'b': |
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72 arg = parseInt(arg, 10).toString(2) |
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73 break |
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74 case 'c': |
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75 arg = String.fromCharCode(parseInt(arg, 10)) |
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76 break |
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77 case 'd': |
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78 case 'i': |
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79 arg = parseInt(arg, 10) |
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80 break |
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81 case 'j': |
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82 arg = JSON.stringify(arg, null, ph.width ? parseInt(ph.width) : 0) |
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83 break |
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84 case 'e': |
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85 arg = ph.precision ? parseFloat(arg).toExponential(ph.precision) : parseFloat(arg).toExponential() |
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86 break |
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87 case 'f': |
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88 arg = ph.precision ? parseFloat(arg).toFixed(ph.precision) : parseFloat(arg) |
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89 break |
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90 case 'g': |
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91 arg = ph.precision ? String(Number(arg.toPrecision(ph.precision))) : parseFloat(arg) |
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92 break |
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93 case 'o': |
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94 arg = (parseInt(arg, 10) >>> 0).toString(8) |
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95 break |
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96 case 's': |
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97 arg = String(arg) |
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98 arg = (ph.precision ? arg.substring(0, ph.precision) : arg) |
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99 break |
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100 case 't': |
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101 arg = String(!!arg) |
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102 arg = (ph.precision ? arg.substring(0, ph.precision) : arg) |
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103 break |
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104 case 'T': |
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105 arg = Object.prototype.toString.call(arg).slice(8, -1).toLowerCase() |
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106 arg = (ph.precision ? arg.substring(0, ph.precision) : arg) |
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107 break |
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108 case 'u': |
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109 arg = parseInt(arg, 10) >>> 0 |
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110 break |
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111 case 'v': |
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112 arg = arg.valueOf() |
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113 arg = (ph.precision ? arg.substring(0, ph.precision) : arg) |
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114 break |
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115 case 'x': |
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116 arg = (parseInt(arg, 10) >>> 0).toString(16) |
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117 break |
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118 case 'X': |
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119 arg = (parseInt(arg, 10) >>> 0).toString(16).toUpperCase() |
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120 break |
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121 } |
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122 if (re.json.test(ph.type)) { |
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123 output += arg |
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124 } |
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125 else { |
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126 if (re.number.test(ph.type) && (!is_positive || ph.sign)) { |
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127 sign = is_positive ? '+' : '-' |
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128 arg = arg.toString().replace(re.sign, '') |
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129 } |
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130 else { |
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131 sign = '' |
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132 } |
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133 pad_character = ph.pad_char ? ph.pad_char === '0' ? '0' : ph.pad_char.charAt(1) : ' ' |
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134 pad_length = ph.width - (sign + arg).length |
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135 pad = ph.width ? (pad_length > 0 ? pad_character.repeat(pad_length) : '') : '' |
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136 output += ph.align ? sign + arg + pad : (pad_character === '0' ? sign + pad + arg : pad + sign + arg) |
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137 } |
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138 } |
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139 } |
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140 return output |
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141 } |
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142 |
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143 var sprintf_cache = Object.create(null) |
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144 |
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145 function sprintf_parse(fmt) { |
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146 if (sprintf_cache[fmt]) { |
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147 return sprintf_cache[fmt] |
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148 } |
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149 |
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150 var _fmt = fmt, match, parse_tree = [], arg_names = 0 |
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151 while (_fmt) { |
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152 if ((match = re.text.exec(_fmt)) !== null) { |
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153 parse_tree.push(match[0]) |
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154 } |
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155 else if ((match = re.modulo.exec(_fmt)) !== null) { |
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156 parse_tree.push('%') |
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157 } |
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158 else if ((match = re.placeholder.exec(_fmt)) !== null) { |
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159 if (match[2]) { |
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160 arg_names |= 1 |
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161 var field_list = [], replacement_field = match[2], field_match = [] |
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162 if ((field_match = re.key.exec(replacement_field)) !== null) { |
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163 field_list.push(field_match[1]) |
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164 while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') { |
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165 if ((field_match = re.key_access.exec(replacement_field)) !== null) { |
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166 field_list.push(field_match[1]) |
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167 } |
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168 else if ((field_match = re.index_access.exec(replacement_field)) !== null) { |
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169 field_list.push(field_match[1]) |
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170 } |
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171 else { |
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172 throw new SyntaxError('[sprintf] failed to parse named argument key') |
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173 } |
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174 } |
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175 } |
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176 else { |
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177 throw new SyntaxError('[sprintf] failed to parse named argument key') |
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178 } |
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179 match[2] = field_list |
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180 } |
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181 else { |
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182 arg_names |= 2 |
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183 } |
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184 if (arg_names === 3) { |
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185 throw new Error('[sprintf] mixing positional and named placeholders is not (yet) supported') |
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186 } |
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187 |
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188 parse_tree.push( |
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189 { |
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190 placeholder: match[0], |
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191 param_no: match[1], |
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192 keys: match[2], |
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193 sign: match[3], |
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194 pad_char: match[4], |
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195 align: match[5], |
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196 width: match[6], |
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197 precision: match[7], |
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198 type: match[8] |
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199 } |
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200 ) |
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201 } |
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202 else { |
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203 throw new SyntaxError('[sprintf] unexpected placeholder') |
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204 } |
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205 _fmt = _fmt.substring(match[0].length) |
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206 } |
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207 return sprintf_cache[fmt] = parse_tree |
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208 } |
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209 |
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210 /** |
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211 * export to either browser or node.js |
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212 */ |
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213 /* eslint-disable quote-props */ |
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214 if (typeof exports !== 'undefined') { |
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215 exports['sprintf'] = sprintf |
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216 exports['vsprintf'] = vsprintf |
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217 } |
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218 if (typeof window !== 'undefined') { |
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219 window['sprintf'] = sprintf |
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220 window['vsprintf'] = vsprintf |
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221 |
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222 if (typeof define === 'function' && define['amd']) { |
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223 define(function() { |
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224 return { |
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225 'sprintf': sprintf, |
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226 'vsprintf': vsprintf |
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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 /* eslint-enable quote-props */ |
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232 }(); // eslint-disable-line |