mirror of
https://github.com/salesagility/SuiteCRM.git
synced 2025-02-15 10:38:46 +00:00
452 lines
14 KiB
PHP
Executable file
452 lines
14 KiB
PHP
Executable file
<?php
|
|
/**
|
|
* JShrink
|
|
*
|
|
* Copyright (c) 2009-2012, Robert Hafner <tedivm@tedivm.com>.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* * Neither the name of Robert Hafner nor the names of his
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* @package JShrink
|
|
* @author Robert Hafner <tedivm@tedivm.com>
|
|
* @copyright 2009-2012 Robert Hafner <tedivm@tedivm.com>
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
* @link https://github.com/tedivm/JShrink
|
|
* @version Release: 0.4
|
|
*/
|
|
|
|
// Some changes done by Akshay Joshi to preserve compatibility with PHP 5.2.
|
|
|
|
/**
|
|
* Minifier
|
|
*
|
|
* Usage - Minifier::minify($js);
|
|
* Usage - Minifier::minify($js, $options);
|
|
* Usage - Minifier::minify($js, array('flaggedComments' => false));
|
|
*
|
|
* @version 0.4
|
|
* @package JShrink
|
|
* @author Robert Hafner <tedivm@tedivm.com>
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
*/
|
|
class Minifier
|
|
{
|
|
/**
|
|
* The input javascript to be minified.
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $input;
|
|
|
|
/**
|
|
* The location of the character (in the input string) that is next to be processed.
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $index = 0;
|
|
|
|
/**
|
|
* The first of the characters currently being looked at.
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $a = '';
|
|
|
|
|
|
/**
|
|
* The next character being looked at (after a);
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $b = '';
|
|
|
|
/**
|
|
* This character is only active when certain look ahead actions take place.
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $c;
|
|
|
|
/**
|
|
* Contains the options for the current minification process.
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $options;
|
|
|
|
/**
|
|
* Contains the default options for minification. This array is merged with the one passed in by the user to create
|
|
* the request specific set of options (stored in the $options attribute).
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $defaultOptions = array('flaggedComments' => true);
|
|
|
|
/**
|
|
* Contains a copy of the JShrink object used to run minification. This is only used internally, and is only stored
|
|
* for performance reasons. There is no internal data shared between minification requests.
|
|
*/
|
|
protected static $jshrink;
|
|
|
|
/**
|
|
* Minifier::minify takes a string containing javascript and removes unneeded characters in order to shrink the code
|
|
* without altering it's functionality.
|
|
*/
|
|
public static function minify($js, $options = array())
|
|
{
|
|
global $sugar_config;
|
|
|
|
if (isset($sugar_config['developer_mode_disable_minifier']) && $sugar_config['developer_mode_disable_minifier'] === true) {
|
|
return $js;
|
|
}
|
|
|
|
try {
|
|
ob_start();
|
|
$currentOptions = array_merge(self::$defaultOptions, $options);
|
|
|
|
if (!isset(self::$jshrink)) {
|
|
self::$jshrink = new Minifier();
|
|
}
|
|
|
|
self::$jshrink->breakdownScript($js, $currentOptions);
|
|
return ob_get_clean();
|
|
} catch (Exception $e) {
|
|
if (isset(self::$jshrink)) {
|
|
self::$jshrink->clean();
|
|
}
|
|
|
|
ob_end_clean();
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Processes a javascript string and outputs only the required characters, stripping out all unneeded characters.
|
|
*
|
|
* @param string $js The raw javascript to be minified
|
|
* @param array $currentOptions Various runtime options in an associative array
|
|
*/
|
|
protected function breakdownScript($js, $currentOptions)
|
|
{
|
|
// reset work attributes in case this isn't the first run.
|
|
$this->clean();
|
|
|
|
$this->options = $currentOptions;
|
|
|
|
$js = str_replace("\r\n", "\n", $js);
|
|
$this->input = str_replace("\r", "\n", $js);
|
|
$this->input = preg_replace('/\h/u', ' ', $this->input);
|
|
|
|
|
|
$this->a = $this->getReal();
|
|
|
|
// the only time the length can be higher than 1 is if a conditional comment needs to be displayed
|
|
// and the only time that can happen for $a is on the very first run
|
|
while (strlen($this->a) > 1) {
|
|
echo $this->a;
|
|
$this->a = $this->getReal();
|
|
}
|
|
|
|
$this->b = $this->getReal();
|
|
|
|
while ($this->a !== false && !is_null($this->a) && $this->a !== '') {
|
|
|
|
// now we give $b the same check for conditional comments we gave $a before we began looping
|
|
if (strlen($this->b) > 1) {
|
|
echo $this->a . $this->b;
|
|
$this->a = $this->getReal();
|
|
$this->b = $this->getReal();
|
|
continue;
|
|
}
|
|
|
|
switch ($this->a) {
|
|
// new lines
|
|
case "\n":
|
|
// if the next line is something that can't stand alone preserve the newline
|
|
if ($this->b != '' && strpos('(-+{[@', $this->b) !== false) {
|
|
echo $this->a;
|
|
$this->saveString();
|
|
break;
|
|
}
|
|
|
|
// if its a space we move down to the string test below
|
|
if ($this->b === ' ') {
|
|
break;
|
|
}
|
|
|
|
// otherwise we treat the newline like a space
|
|
|
|
// no break
|
|
case ' ':
|
|
if (self::isAlphaNumeric($this->b)) {
|
|
echo $this->a;
|
|
}
|
|
|
|
$this->saveString();
|
|
break;
|
|
|
|
default:
|
|
switch ($this->b) {
|
|
case "\n":
|
|
if (strpos('}])+-"\'', $this->a) !== false) {
|
|
echo $this->a;
|
|
$this->saveString();
|
|
break;
|
|
}
|
|
if (self::isAlphaNumeric($this->a)) {
|
|
echo $this->a;
|
|
$this->saveString();
|
|
}
|
|
|
|
break;
|
|
|
|
case ' ':
|
|
if (!self::isAlphaNumeric($this->a)) {
|
|
break;
|
|
}
|
|
|
|
// no break
|
|
default:
|
|
// check for some regex that breaks stuff
|
|
if ($this->a == '/' && ($this->b == '\'' || $this->b == '"')) {
|
|
$this->saveRegex();
|
|
continue;
|
|
}
|
|
|
|
echo $this->a;
|
|
$this->saveString();
|
|
break;
|
|
}
|
|
}
|
|
|
|
// do reg check of doom
|
|
$this->b = $this->getReal();
|
|
|
|
if (($this->b == '/' && strpos('(,=:[!&|?', $this->a) !== false)) {
|
|
$this->saveRegex();
|
|
}
|
|
}
|
|
$this->clean();
|
|
}
|
|
|
|
/**
|
|
* Returns the next string for processing based off of the current index.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function getChar()
|
|
{
|
|
if (isset($this->c)) {
|
|
$char = $this->c;
|
|
unset($this->c);
|
|
} else {
|
|
$tchar = substr($this->input, $this->index, 1);
|
|
if (isset($tchar) && $tchar !== false) {
|
|
$char = $tchar;
|
|
$this->index++;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ($char !== "\n" && ord($char) < 32) {
|
|
return ' ';
|
|
}
|
|
|
|
return $char;
|
|
}
|
|
|
|
/**
|
|
* This function gets the next "real" character. It is essentially a wrapper around the getChar function that skips
|
|
* comments. This has signifigant peformance benefits as the skipping is done using native functions (ie, c code)
|
|
* rather than in script php.
|
|
*
|
|
* @return string Next 'real' character to be processed.
|
|
*/
|
|
protected function getReal()
|
|
{
|
|
$startIndex = $this->index;
|
|
$char = $this->getChar();
|
|
|
|
if ($char == '/') {
|
|
$this->c = $this->getChar();
|
|
|
|
if ($this->c == '/') {
|
|
$thirdCommentString = substr($this->input, $this->index, 1);
|
|
|
|
// kill rest of line
|
|
$char = $this->getNext("\n");
|
|
|
|
if ($thirdCommentString == '@') {
|
|
$endPoint = ($this->index) - $startIndex;
|
|
unset($this->c);
|
|
$char = "\n" . substr($this->input, $startIndex, $endPoint);// . "\n";
|
|
} else {
|
|
$char = $this->getChar();
|
|
$char = $this->getChar();
|
|
}
|
|
} elseif ($this->c == '*') {
|
|
$this->getChar(); // current C
|
|
$thirdCommentString = $this->getChar();
|
|
|
|
if ($thirdCommentString == '@') {
|
|
// conditional comment
|
|
|
|
// we're gonna back up a bit and and send the comment back, where the first
|
|
// char will be echoed and the rest will be treated like a string
|
|
$this->index = $this->index-2;
|
|
return '/';
|
|
} elseif ($this->getNext('*/')) {
|
|
// kill everything up to the next */
|
|
|
|
$this->getChar(); // get *
|
|
$this->getChar(); // get /
|
|
|
|
$char = $this->getChar(); // get next real character
|
|
|
|
// if YUI-style comments are enabled we reinsert it into the stream
|
|
if ($this->options['flaggedComments'] && $thirdCommentString == '!') {
|
|
$endPoint = ($this->index - 1) - $startIndex;
|
|
echo "\n" . substr($this->input, $startIndex, $endPoint) . "\n";
|
|
}
|
|
} else {
|
|
$char = false;
|
|
}
|
|
|
|
if ($char === false) {
|
|
throw new RuntimeException('Stray comment. ' . $this->index);
|
|
}
|
|
|
|
// if we're here c is part of the comment and therefore tossed
|
|
if (isset($this->c)) {
|
|
unset($this->c);
|
|
}
|
|
}
|
|
}
|
|
return $char;
|
|
}
|
|
|
|
/**
|
|
* Pushes the index ahead to the next instance of the supplied string. If it is found the first character of the
|
|
* string is returned.
|
|
*
|
|
* @return string|false Returns the first character of the string if found, false otherwise.
|
|
*/
|
|
protected function getNext($string)
|
|
{
|
|
$pos = strpos($this->input, $string, $this->index);
|
|
|
|
if ($pos === false) {
|
|
return false;
|
|
}
|
|
|
|
$this->index = $pos;
|
|
return substr($this->input, $this->index, 1);
|
|
}
|
|
|
|
/**
|
|
* When a javascript string is detected this function crawls for the end of it and saves the whole string.
|
|
*
|
|
*/
|
|
protected function saveString()
|
|
{
|
|
$this->a = $this->b;
|
|
if ($this->a == "'" || $this->a == '"') { // is the character a quote
|
|
// save literal string
|
|
$stringType = $this->a;
|
|
|
|
while (1) {
|
|
echo $this->a;
|
|
$this->a = $this->getChar();
|
|
|
|
switch ($this->a) {
|
|
case $stringType:
|
|
break 2;
|
|
|
|
case "\n":
|
|
throw new RuntimeException('Unclosed string. ' . $this->index);
|
|
break;
|
|
|
|
case '\\':
|
|
echo $this->a;
|
|
$this->a = $this->getChar();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* When a regular expression is detected this funcion crawls for the end of it and saves the whole regex.
|
|
*/
|
|
protected function saveRegex()
|
|
{
|
|
echo $this->a . $this->b;
|
|
|
|
while (($this->a = $this->getChar()) !== false) {
|
|
if ($this->a == '/') {
|
|
break;
|
|
}
|
|
|
|
if ($this->a == '\\') {
|
|
echo $this->a;
|
|
$this->a = $this->getChar();
|
|
}
|
|
|
|
if ($this->a == "\n") {
|
|
throw new RuntimeException('Stray regex pattern. ' . $this->index);
|
|
}
|
|
|
|
echo $this->a;
|
|
}
|
|
$this->b = $this->getReal();
|
|
}
|
|
|
|
/**
|
|
* Resets attributes that do not need to be stored between requests so that the next request is ready to go.
|
|
*/
|
|
protected function clean()
|
|
{
|
|
unset($this->input);
|
|
$this->index = 0;
|
|
$this->a = $this->b = '';
|
|
unset($this->c);
|
|
unset($this->options);
|
|
}
|
|
|
|
/**
|
|
* Checks to see if a character is alphanumeric.
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected static function isAlphaNumeric($char)
|
|
{
|
|
return preg_match('/^[\w\$]$/', $char) === 1 || $char == '/';
|
|
}
|
|
}
|