diff options
Diffstat (limited to 'jsmin.php')
-rw-r--r-- | jsmin.php | 375 |
1 files changed, 0 insertions, 375 deletions
diff --git a/jsmin.php b/jsmin.php deleted file mode 100644 index 5c3f88143..000000000 --- a/jsmin.php +++ /dev/null @@ -1,375 +0,0 @@ -<?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 <[email protected]> - * @copyright 2002 Douglas Crockford <[email protected]> (jsmin.c) - * @copyright 2008 Ryan Grove <[email protected]> (PHP port) - * @license http://opensource.org/licenses/mit-license.php MIT License - * @version 1.1.1 (2008-03-02) - * @link https://github.com/rgrove/jsmin-php/ - */ - -class JSMin { - const ORD_LF = 10; - const ORD_SPACE = 32; - const ACTION_KEEP_A = 1; - const ACTION_DELETE_A = 2; - const ACTION_DELETE_A_B = 3; - - protected $a = ''; - protected $b = ''; - protected $input = ''; - protected $inputIndex = 0; - protected $inputLength = 0; - protected $lookAhead = null; - protected $output = ''; - - // -- Public Static Methods -------------------------------------------------- - - /** - * Minify Javascript - * - * @uses __construct() - * @uses min() - * @param string $js Javascript to be minified - * @return string - */ - public static function minify($js) { - $jsmin = new JSMin($js); - return $jsmin->min(); - } - - // -- Public Instance Methods ------------------------------------------------ - - /** - * Constructor - * - * @param string $input Javascript to be minified - */ - public function __construct($input) { - $this->input = str_replace("\r\n", "\n", $input); - $this->inputLength = strlen($this->input); - } - - // -- Protected Instance Methods --------------------------------------------- - - /** - * Action -- do something! What to do is determined by the $command argument. - * - * action treats a string as a single character. Wow! - * action recognizes a regular expression if it is preceded by ( or , or =. - * - * @uses next() - * @uses get() - * @throws JSMinException If parser errors are found: - * - Unterminated string literal - * - Unterminated regular expression set in regex literal - * - Unterminated regular expression literal - * @param int $command One of class constants: - * ACTION_KEEP_A Output A. Copy B to A. Get the next B. - * ACTION_DELETE_A Copy B to A. Get the next B. (Delete A). - * ACTION_DELETE_A_B Get the next B. (Delete B). - */ - protected function action($command) { - switch($command) { - case self::ACTION_KEEP_A: - $this->output .= $this->a; - - case self::ACTION_DELETE_A: - $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 self::ACTION_DELETE_A_B: - $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->a === '{' || $this->a === '}' || $this->a === ';' || - $this->a === "\n" )) { - - $this->output .= $this->a . $this->b; - - for (;;) { - $this->a = $this->get(); - - if ($this->a === '[') { - /* - inside a regex [...] set, which MAY contain a '/' itself. Example: mootools Form.Validator near line 460: - return Form.Validator.getValidator('IsEmpty').test(element) || (/^(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]\.?){0,63}[a-z0-9!#$%&'*+/=?^_`{|}~-]@(?:(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)*[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\])$/i).test(element.get('value')); - */ - for (;;) { - $this->output .= $this->a; - $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 set in regex literal.'); - } - } - } elseif ($this->a === '/') { - break; - } elseif ($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(); - } - } - } - - /** - * Get next char. Convert ctrl char to space. - * - * @return string|null - */ - protected function get() { - $c = $this->lookAhead; - $this->lookAhead = null; - - if ($c === null) { - if ($this->inputIndex < $this->inputLength) { - $c = substr($this->input, $this->inputIndex, 1); - $this->inputIndex += 1; - } else { - $c = null; - } - } - - if ($c === "\r") { - return "\n"; - } - - if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) { - return $c; - } - - return ' '; - } - - /** - * Is $c a letter, digit, underscore, dollar sign, or non-ASCII character. - * - * @return bool - */ - protected function isAlphaNum($c) { - return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1; - } - - /** - * Perform minification, return result - * - * @uses action() - * @uses isAlphaNum() - * @return string - */ - protected function min() { - $this->a = "\n"; - $this->action(self::ACTION_DELETE_A_B); - - while ($this->a !== null) { - switch ($this->a) { - case ' ': - if ($this->isAlphaNum($this->b)) { - $this->action(self::ACTION_KEEP_A); - } else { - $this->action(self::ACTION_DELETE_A); - } - break; - - case "\n": - switch ($this->b) { - case '{': - case '[': - case '(': - case '+': - case '-': - $this->action(self::ACTION_KEEP_A); - break; - - case ' ': - $this->action(self::ACTION_DELETE_A_B); - break; - - default: - if ($this->isAlphaNum($this->b)) { - $this->action(self::ACTION_KEEP_A); - } - else { - $this->action(self::ACTION_DELETE_A); - } - } - break; - - default: - switch ($this->b) { - case ' ': - if ($this->isAlphaNum($this->a)) { - $this->action(self::ACTION_KEEP_A); - break; - } - - $this->action(self::ACTION_DELETE_A_B); - break; - - case "\n": - switch ($this->a) { - case '}': - case ']': - case ')': - case '+': - case '-': - case '"': - case "'": - $this->action(self::ACTION_KEEP_A); - break; - - default: - if ($this->isAlphaNum($this->a)) { - $this->action(self::ACTION_KEEP_A); - } - else { - $this->action(self::ACTION_DELETE_A_B); - } - } - break; - - default: - $this->action(self::ACTION_KEEP_A); - break; - } - } - } - - return $this->output; - } - - /** - * Get the next character, skipping over comments. peek() is used to see - * if a '/' is followed by a '/' or '*'. - * - * @uses get() - * @uses peek() - * @throws JSMinException On unterminated comment. - * @return string - */ - 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; - } - - /** - * Get next char. If is ctrl character, translate to a space or newline. - * - * @uses get() - * @return string|null - */ - protected function peek() { - $this->lookAhead = $this->get(); - return $this->lookAhead; - } -} - -// -- Exceptions --------------------------------------------------------------- -class JSMinException extends Exception {} -?>
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