mirror of
https://git.friendi.ca/friendica/friendica-addons.git
synced 2024-11-30 03:53:16 +00:00
375 lines
No EOL
11 KiB
PHP
375 lines
No EOL
11 KiB
PHP
<?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 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 {}
|
|
?>
|