<?php
/*
* Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
* Copyright (C) 2006-2009 Dan Fuhry
* Javascript compression library - used to compact the client-side Javascript code (all 72KB of it!) to save some bandwidth
*
* This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
*
* This class was written by Andrea Giammarchi and was downloaded from PHPClasses.org. The information page stated that
* this class is licensed under the GNU General Public License, the terms of which can be found by reading the file
* "GPL" included with the Enano package.
*/
/**
* JavaScriptCompressor class,
* removes comments or pack JavaScript source[s] code.
* ______________________________________________________________
* JavaScriptCompressor (just 2 public methods)
* |
* |________ getClean(jsSource:mixed):string
* | returns one or more JavaScript code without comments,
* | by default removes some spaces too
* |
* |________ getPacked(jsSource:mixed):string
* returns one or more JavaScript code packed,
* using getClean and obfuscating output
* --------------------------------------------------------------
* Note about $jsSource input varible:
* this var should be a string (i.e. $jsSource = file_get_contents("myFile.js");)
* should be an array of strings (i.e. array(file_get_contents("1.js"), file_get_contents("2.js"), ... ))
* should be an array with 1 or 2 keys:
* (i.e. array('code'=>file_get_contents("mySource.js")))
* (i.e. array('code'=>file_get_contents("mySource.js"), 'name'=>'mySource'))
* ... and should be an array of arrays created with theese rules
* array(
* file_get_contents("secret.js"),
* array('code'=>$anotherJS),
* array('code'=>$myJSapplication, 'name'=>'JSApplication V 1.0')
* )
*
* The name used on dedicated key, will be write on parsed source header
* --------------------------------------------------------------
* Note about returned strings:
* Your browser should wrap very long strings, then don't use
* cut and paste from your browser, save output into your database or directly
* in a file or print them only inside <script> and </script> tags
* --------------------------------------------------------------
* Note about parser performance:
* With pure PHP embed code this class should be slow and not really safe
* for your server performance then don't parse JavaScript runtime for each
* file you need and create some "parsed" caching system
* (at least while i've not created a compiled version of theese class functions).
* Here there's a caching system example: http://www.phpclasses.org/browse/package/3158.html
* --------------------------------------------------------------
* Note about JavaScript packed compatibility:
* To be sure about compatibility include before every script JSL Library:
* http://www.devpro.it/JSL/
* JSL library add some features for old or buggy browsers, one of
* those functions is String.replace with function as second argument,
* used by JavaScript generated packed code to rebuild original code.
*
* Remember that KDE 3.5, Safari and IE5 will not work correctly with packed version
* if you'll not include JSL.
* --------------------------------------------------------------
* @Compatibility >= PHP 4
* @Author Andrea Giammarchi
* @see http://www.devpro.it/
* @since 2006/05/31
* @since 2006/08/01 [requires SourceMap.class.php to parse source faster and better (dojo.js.uncompressed.js file (211Kb) successfull cleaned or packed)]
* @version 0.8
* Dependencies:
* Server: BaseConvert.class.php
* Server: SourceMap.class.php
* Client: JSL.js (http://www.devpro.it/JSL/)
* Convertion is supported by every browser with JSL Library (FF 1+ Opera 8+ and IE5.5+ are supported without JSL too)
* @copyright Dean Edwards for his originally idea [dean.edwards.name] and his JavaScript packer
*/
class JavaScriptCompressor {
/**
* public variables
* stats:string after every compression has some informations
* version:string version of this class
*/
var $stats = '',
$version = '0.8';
/** 'private' variables, any comment sorry */
var $__startTime = 0,
$__sourceLength = 0,
$__sourceNewLength = 0,
$__totalSources = 0,
$__sources = array(),
$__delimeter = array(),
$__cleanFinder = array("/(\n|\r)+/", "/( |\t)+/", "/(\n )|( \n)|( \n )/", "/[[:space:]]+(\)|})/", "/(\(|{)[[:space:]]+/", "/[[:space:]]*(;|,|:|<|>|\&|\||\=|\?|\+|\-|\%)[[:space:]]*/", "/\)[[:space:]]+{/", "/}[[:space:]]+\(/"),
$__cleanReplacer = array("\n", " ", "\n", "\\1", "\\1", "\\1", "){", "}("),
$__BC = null,
$__SourceMap = null;
/**
* public constructor
* creates a new BaseConvert class variable (base 36)
*/
function __construct() {
$this->__SourceMap = new SourceMap();
$this->__BC = new BaseConvert('0123456789abcdefghijklmnopqrstuvwxyz');
$this->__delimeter = array(
array('name'=>'doublequote', 'start'=>'"', 'end'=>'"', 'noslash'=>true),
array('name'=>'singlequote', 'start'=>"'", 'end'=>"'", 'noslash'=>true),
array('name'=>'singlelinecomment', 'start'=>'//', 'end'=>array("\n", "\r")),
array('name'=>'multilinecomment', 'start'=>'/*', 'end'=>'*/'),
array('name'=>'regexp', 'start'=>'/', 'end'=>'/', 'match'=>"/^\/[^\n\r]+\/$/", 'noslash'=>true)
);
}
/**
* public method
* getClean(mixed [, bool]):string
* compress JavaScript removing comments and somespaces (on by default)
* @param mixed view example and notes on class comments
*/
function getClean($jsSource) {
return $this->__commonInitMethods($jsSource, false);
}
/**
* public method
* getPacked(mixed):string
* compress JavaScript replaceing words and removing comments and some spaces
* @param mixed view example and notes on class comments
*/
function getPacked($jsSource) {
return $this->__commonInitMethods($jsSource, true);
}
/** 'private' methods, any comment sorry */
function __addCleanCode($str) {
return preg_replace($this->__cleanFinder, $this->__cleanReplacer, trim($str));
}
function __addClean(&$arr, &$str, &$start, &$end, $clean) {
if($clean)
array_push($arr, $this->__addCleanCode(substr($str, $start, $end - $start)));
else
array_push($arr, substr($str, $start, $end - $start));
}
function __clean(&$str) {
$len = strlen($str);
$type = '';
$clean = array();
$map = $this->__SourceMap->getMap($str, $this->__delimeter);
for($a = 0, $b = 0, $c = count($map); $a < $c; $a++) {
$type = &$map[$a]['name'];
switch($type) {
case 'code':
case 'regexp':
case 'doublequote':
case 'singlequote':
$this->__addClean($clean, $str, $map[$a]['start'], $map[$a]['end'], ($type === 'code'));
if($type !== 'regexp')
array_push($clean, "\n");
break;
}
}
return preg_replace("/(\n)+/", "\n", trim(implode('', $clean)));
}
function __commonInitMethods(&$jsSource, $packed) {
$header = '';
$this->__startTime = $this->__getTime();
$this->__sourceLength = 0;
$this->__sourceManager($jsSource);
for($a = 0, $b = $this->__totalSources; $a < $b; $a++)
$this->__sources[$a]['code'] = $this->__clean($this->__sources[$a]['code']);
$header = $this->__getHeader();
for($a = 0, $b = $this->__totalSources; $a < $b; $a++)
$this->__sources[$a] = &$this->__sources[$a]['code'];
$this->__sources = implode(';', $this->__sources);
if($packed)
$this->__sources = $this->__pack($this->__sources);
$this->__sourceNewLength = strlen($this->__sources);
$this->__setStats();
return $header.$this->__sources;
}
function __getHeader() {
return implode('', array(
'/* ',$this->__getScriptNames(),'JavaScriptCompressor ',$this->version,' [www.devpro.it], ',
'thanks to Dean Edwards for idea [dean.edwards.name]',
" */\r\n"
));
}
function __getScriptNames() {
$a = 0;
$result = array();
for($b = $this->__totalSources; $a < $b; $a++) {
if($this->__sources[$a]['name'] !== '')
array_push($result, $this->__sources[$a]['name']);
}
$a = count($result);
if($a-- > 0)
$result[$a] .= ' with ';
return $a < 0 ? '' : implode(', ', $result);
}
function __getSize($size, $dec = 2) {
$toEval = '';
$type = array('bytes', 'Kb', 'Mb', 'Gb');
$nsize = $size;
$times = 0;
while($nsize > 1024) {
$nsize = $nsize / 1024;
$toEval .= '/1024';
$times++;
}
if($times === 0)
$fSize = $size.' '.$type[$times];
else {
eval('$size=($size'.$toEval.');');
$fSize = number_format($size, $dec, '.', '').' '.$type[$times];
}
return $fSize;
}
function __getTime($startTime = null) {
list($usec, $sec) = explode(' ', microtime());
$newtime = (float)$usec + (float)$sec;
if($startTime !== null)
$newtime = number_format(($newtime - $startTime), 3);
return $newtime;
}
function __pack(&$str) {
$container = array();
$str = preg_replace("/(\w+)/e", '$this->__BC->toBase($this->__wordsParser("\\1",$container));', $this->__clean($str));
$str = str_replace("\n", '\n', addslashes($str));
return 'eval(function(A,G){return A.replace(/(\\w+)/g,function(a,b){return G[parseInt(b,36)]})}("'.$str.'","'.implode(',', $container).'".split(",")));';
}
function __setStats() {
$this->stats = implode(' ', array(
$this->__getSize($this->__sourceLength),
'to',
$this->__getSize($this->__sourceNewLength),
'in',
$this->__getTime($this->__startTime),
'seconds'
));
}
function __sourceManager(&$jsSource) {
$b = count($jsSource);
$this->__sources = array();
if(is_string($jsSource))
$this->__sourcePusher($jsSource, '');
elseif(is_array($jsSource) && $b > 0) {
if(isset($jsSource['code']))
$this->__sourcePusher($jsSource['code'], (isset($jsSource['name']) ? $jsSource['name'] : ''));
else {
for($a = 0; $a < $b; $a++) {
if(is_array($jsSource[$a]) && isset($jsSource[$a]['code'], $jsSource[$a]['name']))
$this->__sourcePusher($jsSource[$a]['code'], trim($jsSource[$a]['name']));
elseif(is_string($jsSource[$a]))
$this->__sourcePusher($jsSource[$a], '');
}
}
}
$this->__totalSources = count($this->__sources);
}
function __sourcePusher(&$code, $name) {
$this->__sourceLength += strlen($code);
array_push($this->__sources, array('code'=>$code, 'name'=>$name));
}
function __wordsParser($str, &$d) {
if(@is_null($key = array_shift($key = array_keys($d,$str))))
$key = array_push($d, $str) - 1;
return $key;
}
}
/**
* BaseConvert class,
* converts an unsigned base 10 integer to a different base and vice versa.
* ______________________________________________________________
* BaseConvert
* |
* |________ constructor(newBase:string)
* | uses newBase string var for convertion
* | [i.e. "0123456789abcdef" for an hex convertion]
* |
* |________ toBase(unsignedInteger:uint):string
* | return base value of input
* |
* |________ fromBase(baseString:string):uint
* return base 10 integer value of base input
* --------------------------------------------------------------
* REMEMBER: PHP < 6 doesn't work correctly with integer greater than 2147483647 (2^31 - 1)
* --------------------------------------------------------------
* @Compatibility >= PHP 4
* @Author Andrea Giammarchi
* @Site http://www.devpro.it/
* @Date 2006/06/05
* @Version 1.0
*/
class BaseConvert {
var $base, $baseLength;
function BaseConvert($base) {
$this->base = &$base;
$this->baseLength = strlen($base);
}
function toBase($num) {
$module = 0; $result = '';
while($num) {
$result = $this->base{($module = $num % $this->baseLength)}.$result;
$num = (int)(($num - $module) / $this->baseLength);
}
return $result !== '' ? $result : $this->base{0};
}
function fromBase($str) {
$pos = 0; $len = strlen($str) - 1; $result = 0;
while($pos < $len)
$result += pow($this->baseLength, ($len - $pos)) * strpos($this->base, $str{($pos++)});
return $len >= 0 ? $result + strpos($this->base, $str{($pos)}) : null;
}
}
/**
* SourceMap class,
* reads a generic language source code and returns its map.
* ______________________________________________________________
* The SourceMap goals is to create a map of a generic script/program language.
* The getMap method returns an array/list of arrays/dictionary/objects
* of source map using delimeters variable to map correctly:
* - multi line comments
* - single line comments
* - double quoted strings
* - single quoted strings
* - pure code
* - everything else (for example regexp [/re/] with javascript), just adding a correct delimeter
* --------------------------------------------------------------
* What about the delimeter
* It's an array/list of arrays/dictionary/obects with some properties to find what you're looking for.
*
* parameters are:
* - name, the name of the delimeter (i.e. "doublequote")
* - start, one or mode chars to find as start delimeter (i.e. " for double quoted string)
* - end, one or mode chars to find as end delimeter (i.e. " for double quoted string) [end should be an array/list too]
*
* optional parameters are:
* - noslash, if true find the end of the delimeter only if last char is not slashed (i.e. "string\"test" find " after test)
* - match, if choosed language has regexp, verify if string from start to end matches used regexp (i.e. /^\/[^\n\r]+\/$/ for JavaScript regexp)
*
* If end parameter is an array, match and noslash are not supported (i.e. ["\n", "\r"] for end delimeter of a single line comment)
* --------------------------------------------------------------
* What about SourceMap usage
* It should be a good solution to create sintax highlighter, parser,
* verifier or some other source code parsing procedure
* --------------------------------------------------------------
* What about SourceMap performance script/languages
* I've created different version of this class to test each script/program language performance too.
* Python with or without Psyco is actually the faster parser.
* However with this PHP version this class has mapped "dojo.js.uncompressed.js" file (about 211Kb) in less than 0.5 second.
* Test has been done with embed class and PHP as module, any accelerator was used for this PHP test.
* --------------------------------------------------------------
* @Compatibility >= PHP 4
* @Author Andrea Giammarchi
* @Site http://www.devpro.it/
* @Date 2006/08/01
* @LastMOd 2006/08/01
* @Version 0.1
* @Application Last version of JavaScriptCompressor class use this one to map source code.
*/
class SourceMap {
/**
* public method
* getMap(&$source:string, &$delimeters:array):array
* Maps the source code using $delimeters rules and returns map as an array
* NOTE: read comments to know more about map and delimeter
*
* @param string generic source code
* @param array array with nested array with code rules
*/
function getMap(&$source, &$delimeters) {
# "unsigned" integer variables
$sourcePosition = 0;
$delimetersPosition = 0;
$findLength = 0;
$len = 0;
$tempIndex = 0;
$sourceLength = strlen($source);
$delimetersLength = count($delimeters);
# integer variables
$tempPosition = -1;
$endPosition = -1;
# array variables
$map = array();
$tempMap = array();
$tempDelimeter = array();
while($sourcePosition < $sourceLength) {
$endPosition = -1;
for($delimetersPosition = 0; $delimetersPosition < $delimetersLength; $delimetersPosition++) {
$tempPosition = strpos($source, $delimeters[$delimetersPosition]['start'], $sourcePosition);
if($tempPosition !== false && ($tempPosition < $endPosition || $endPosition === -1)) {
$endPosition = $tempPosition;
$tempIndex = $delimetersPosition;
}
}
if($endPosition !== -1) {
$sourcePosition = $endPosition;
$tempDelimeter = &$delimeters[$tempIndex];
$findLength = strlen($tempDelimeter['start']);
if(is_array($tempDelimeter['end'])) {
$delimetersPosition = 0;
$endPosition = -1;
for($len = count($tempDelimeter['end']); $delimetersPosition < $len; $delimetersPosition++) {
$tempPosition = strpos($source, $tempDelimeter['end'][$delimetersPosition], $sourcePosition + $findLength);
if($tempPosition !== false && ($tempPosition < $endPosition || $endPosition === -1)) {
$endPosition = $tempPosition;
$tempIndex = $delimetersPosition;
}
}
if($endPosition !== -1)
$endPosition = $endPosition + strlen($tempDelimeter['end'][$tempIndex]);
else
$endPosition = $sourceLength;
array_push($map, array('name'=>$tempDelimeter['name'], 'start'=>$sourcePosition, 'end'=>$endPosition));
$sourcePosition = $endPosition - 1;
}
elseif(isset($tempDelimeter['match'])) {
$tempPosition = strpos($source, $tempDelimeter['end'], $sourcePosition + $findLength);
$len = strlen($tempDelimeter['end']);
if($tempPosition !== false && preg_match($tempDelimeter['match'], substr($source, $sourcePosition, $tempPosition - $sourcePosition + $len))) {
$endPosition = isset($tempDelimeter['noslash']) ? $this->__endCharNoSlash($source, $sourcePosition, $tempDelimeter['end'], $sourceLength) : $tempPosition + $len;
array_push($map, array('name'=>$tempDelimeter['name'], 'start'=>$sourcePosition, 'end'=>$endPosition));
$sourcePosition = $endPosition - 1;
}
}
else {
if(isset($tempDelimeter['noslash']))
$endPosition = $this->__endCharNoSlash($source, $sourcePosition, $tempDelimeter['end'], $sourceLength);
else {
$tempPosition = strpos($source, $tempDelimeter['end'], $sourcePosition + $findLength);
if($tempPosition !== false)
$endPosition = $tempPosition + strlen($tempDelimeter['end']);
else
$endPosition = $sourceLength;
}
array_push($map, array('name'=>$tempDelimeter['name'], 'start'=>$sourcePosition, 'end'=>$endPosition));
$sourcePosition = $endPosition - 1;
}
}
else
$sourcePosition = $sourceLength - 1;
++$sourcePosition;
}
$len = count($map);
if($len === 0)
array_push($tempMap, array('name'=>'code', 'start'=>0, 'end'=>$sourceLength));
else {
for($tempIndex = 0; $tempIndex < $len; $tempIndex++) {
if($tempIndex === 0 && $map[$tempIndex]['start'] > 0)
array_push($tempMap, array('name'=>'code', 'start'=>0, 'end'=>$map[$tempIndex]['start']));
elseif($tempIndex > 0 && $map[$tempIndex]['start'] > $map[$tempIndex-1]['end'])
array_push($tempMap, array('name'=>'code', 'start'=>$map[$tempIndex-1]['end'], 'end'=>$map[$tempIndex]['start']));
array_push($tempMap, array('name'=>$map[$tempIndex]['name'], 'start'=>$map[$tempIndex]['start'], 'end'=>$map[$tempIndex]['end']));
if($tempIndex + 1 === $len && $map[$tempIndex]['end'] < $sourceLength)
array_push($tempMap, array('name'=>'code', 'start'=>$map[$tempIndex]['end'], 'end'=>$sourceLength));
}
}
return $tempMap;
}
function __endCharNoSlash(&$source, $position, &$find, &$len) {
$temp = strlen($find);
do {
$position = strpos($source, $find, $position + 1);
}while($position !== false && !$this->__charNoSlash($source, $position));
if($position === false) $position = $len - $temp;
return $position + $temp;
}
function __charNoSlash(&$source, &$position) {
$next = 1; $len = $position - $next;
while($len > 0 && $source{$len} === '\\') $len = $position - (++$next);
return (($next - 1) % 2 === 0);
}
}
/**
* Wrapper for the JavaScriptCompressor class.
* @param string Javascript code to compact. If this doesn't contain any newline characters, will be treated as a filename.
* @param bool If true, aggressively compresses the code. Otherwise, just strips comments and some whitespace.
* @return string Compressed JS
*/
function perform_js_compress($text_or_file, $aggressive = false)
{
static $compressor = false;
if ( !is_object($compressor) )
$compressor = new JavaScriptCompressor();
if ( strpos($text_or_file, "\n") )
{
$text =& $text_or_file;
}
else if ( file_exists($text_or_file) )
{
$text = file_get_contents($text_or_file);
}
else
{
$text =& $text_or_file;
}
return ( $aggressive ) ? $compressor->getPacked($text) : $compressor->getClean($text);
}
?>