1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 | <?php /** * jsmin.php - PHP implementation of Douglas Crockford's JSMin. * * This is pretty much a direct port of jsmin.c to PHP with just a few * PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and * outputs to stdout, this library accepts a string as input and returns another * string as output. * * PHP 5 or higher is required. * * Permission is hereby granted to use this version of the library under the * same terms as jsmin.c, which has the following license: * * -- * Copyright (c) 2002 Douglas Crockford (www.crockford.com) * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * The Software shall be used for Good, not Evil. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * -- * * @package JSMin * @author Ryan Grove <ryan@wonko.com> * @copyright 2002 Douglas Crockford <douglas@crockford.com> (jsmin.c) * @copyright 2008 Ryan Grove <ryan@wonko.com> (PHP port) * @license http://opensource.org/licenses/mit-license.php MIT License * @version 1.1.1 (2008-03-02) * @link http://code.google.com/p/jsmin-php/ */ class JSMin { const ORD_LF = 10; const ORD_SPACE = 32; protected $a = ''; protected $b = ''; protected $input = ''; protected $inputIndex = 0; protected $inputLength = 0; protected $lookAhead = null; protected $output = ''; // -- Public Static Methods -------------------------------------------------- public static function minify($js) { $jsmin = new JSMin($js); return $jsmin->min(); } // -- Public Instance Methods ------------------------------------------------ public function __construct($input) { $this->input = str_replace("\r\n", "\n", $input); $this->inputLength = strlen($this->input); } // -- Protected Instance Methods --------------------------------------------- protected function action($d) { switch($d) { case 1: $this->output .= $this->a; case 2: $this->a = $this->b; if ($this->a === "'" || $this->a === '"') { for (;;) { $this->output .= $this->a; $this->a = $this->get(); if ($this->a === $this->b) { break; } if (ord($this->a) <= self::ORD_LF) { throw new JSMinException('Unterminated string literal.'); } if ($this->a === '\\') { $this->output .= $this->a; $this->a = $this->get(); } } } case 3: $this->b = $this->next(); if ($this->b === '/' && ( $this->a === '(' || $this->a === ',' || $this->a === '=' || $this->a === ':' || $this->a === '[' || $this->a === '!' || $this->a === '&' || $this->a === '|' || $this->a === '?')) { $this->output .= $this->a . $this->b; for (;;) { $this->a = $this->get(); if ($this->a === '/') { break; } elseif ($this->a === '\\') { $this->output .= $this->a; $this->a = $this->get(); } elseif (ord($this->a) <= self::ORD_LF) { throw new JSMinException('Unterminated regular expression '. 'literal.'); } $this->output .= $this->a; } $this->b = $this->next(); } } } protected function get() { $c = $this->lookAhead; $this->lookAhead = null; if ($c === null) { if ($this->inputIndex < $this->inputLength) { $c = $this->input[$this->inputIndex]; $this->inputIndex += 1; } else { $c = null; } } if ($c === "\r") { return "\n"; } if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) { return $c; } return ' '; } protected function isAlphaNum($c) { return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1; } protected function min() { $this->a = "\n"; $this->action(3); while ($this->a !== null) { switch ($this->a) { case ' ': if ($this->isAlphaNum($this->b)) { $this->action(1); } else { $this->action(2); } break; case "\n": switch ($this->b) { case '{': case '[': case '(': case '+': case '-': $this->action(1); break; case ' ': $this->action(3); break; default: if ($this->isAlphaNum($this->b)) { $this->action(1); } else { $this->action(2); } } break; default: switch ($this->b) { case ' ': if ($this->isAlphaNum($this->a)) { $this->action(1); break; } $this->action(3); break; case "\n": switch ($this->a) { case '}': case ']': case ')': case '+': case '-': case '"': case "'": $this->action(1); break; default: if ($this->isAlphaNum($this->a)) { $this->action(1); } else { $this->action(3); } } break; default: $this->action(1); break; } } } return $this->output; } protected function next() { $c = $this->get(); if ($c === '/') { switch($this->peek()) { case '/': for (;;) { $c = $this->get(); if (ord($c) <= self::ORD_LF) { return $c; } } case '*': $this->get(); for (;;) { switch($this->get()) { case '*': if ($this->peek() === '/') { $this->get(); return ' '; } break; case null: throw new JSMinException('Unterminated comment.'); } } default: return $c; } } return $c; } protected function peek() { $this->lookAhead = $this->get(); return $this->lookAhead; } } // -- Exceptions --------------------------------------------------------------- class JSMinException extends Exception {} ?> |