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Version 3.4.5

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Neo committed 2025-12-19 00:38:12 -08:00
1 parent fb6b5baabc
commit e4478369d8
1360 files changed
+228921 -179445
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upload/public/min/lib/JSMin.php
+103 -32
View File
@@ -1,16 +1,20 @@
<?php
/**
* jsmin.php - PHP implementation of Douglas Crockford's JSMin.
* JSMin.php - modified PHP implementation of Douglas Crockford's JSMin.
*
* This is a direct port of jsmin.c to PHP with a few PHP performance tweaks and
* modifications to preserve some comments (see below). Also, rather than using
* stdin/stdout, JSMin::minify() accepts a string as input and returns another
* string as output.
* <code>
* $minifiedJs = JSMin::minify($js);
* </code>
*
* This is a modified port of jsmin.c. Improvements:
*
* Comments containing IE conditional compilation are preserved, as are multi-line
* comments that begin with "/*!" (for documentation purposes). In the latter case
* newlines are inserted around the comment to enhance readability.
* Does not choke on some regexp literals containing quote characters. E.g. /'/
*
* Spaces are preserved after some add/sub operators, so they are not mistakenly
* converted to post-inc/dec. E.g. a + ++b -> a+ ++b
*
* Preserves multi-line comments that begin with /*!
*
* PHP 5 or higher is required.
*
* Permission is hereby granted to use this version of the library under the
@@ -56,7 +60,7 @@ class JSMin {
const ACTION_KEEP_A = 1;
const ACTION_DELETE_A = 2;
const ACTION_DELETE_A_B = 3;
protected $a = "\n";
protected $b = '';
protected $input = '';
@@ -64,11 +68,13 @@ class JSMin {
protected $inputLength = 0;
protected $lookAhead = null;
protected $output = '';
protected $lastByteOut = '';
/**
* Minify Javascript
* Minify Javascript.
*
* @param string $js Javascript to be minified
*
* @return string
*/
public static function minify($js)
@@ -76,38 +82,55 @@ class JSMin {
$jsmin = new JSMin($js);
return $jsmin->min();
}
/**
* Setup process
* @param string $input
*/
public function __construct($input)
{
$this->input = str_replace("\r\n", "\n", $input);
$this->inputLength = strlen($this->input);
$this->input = $input;
}
/**
* Perform minification, return result
*
* @return string
*/
public function min()
{
if ($this->output !== '') { // min already run
return $this->output;
}
$mbIntEnc = null;
if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
$mbIntEnc = mb_internal_encoding();
mb_internal_encoding('8bit');
}
$this->input = str_replace("\r\n", "\n", $this->input);
$this->inputLength = strlen($this->input);
$this->action(self::ACTION_DELETE_A_B);
while ($this->a !== null) {
// determine next command
$command = self::ACTION_KEEP_A; // default
if ($this->a === ' ') {
if (! $this->isAlphaNum($this->b)) {
if (($this->lastByteOut === '+' || $this->lastByteOut === '-')
&& ($this->b === $this->lastByteOut)) {
// Don't delete this space. If we do, the addition/subtraction
// could be parsed as a post-increment
} elseif (! $this->isAlphaNum($this->b)) {
$command = self::ACTION_DELETE_A;
}
} elseif ($this->a === "\n") {
if ($this->b === ' ') {
$command = self::ACTION_DELETE_A_B;
} elseif (false === strpos('{[(+-', $this->b)
&& ! $this->isAlphaNum($this->b)) {
// in case of mbstring.func_overload & 2, must check for null b,
// otherwise mb_strpos will give WARNING
} elseif ($this->b === null
|| (false === strpos('{[(+-', $this->b)
&& ! $this->isAlphaNum($this->b))) {
$command = self::ACTION_DELETE_A;
}
} elseif (! $this->isAlphaNum($this->a)) {
@@ -120,19 +143,38 @@ class JSMin {
$this->action($command);
}
$this->output = trim($this->output);
if ($mbIntEnc !== null) {
mb_internal_encoding($mbIntEnc);
}
return $this->output;
}
/**
* ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
* ACTION_DELETE_A = Copy B to A. Get the next B.
* ACTION_DELETE_A_B = Get the next B.
*
* @param int $command
* @throws JSMin_UnterminatedRegExpException|JSMin_UnterminatedStringException
*/
protected function action($command)
{
if ($command === self::ACTION_DELETE_A_B
&& $this->b === ' '
&& ($this->a === '+' || $this->a === '-')) {
// Note: we're at an addition/substraction operator; the inputIndex
// will certainly be a valid index
if ($this->input[$this->inputIndex] === $this->a) {
// This is "+ +" or "- -". Don't delete the space.
$command = self::ACTION_KEEP_A;
}
}
switch ($command) {
case self::ACTION_KEEP_A:
$this->output .= $this->a;
$this->lastByteOut = $this->a;
// fallthrough
case self::ACTION_DELETE_A:
$this->a = $this->b;
@@ -140,17 +182,22 @@ class JSMin {
$str = $this->a; // in case needed for exception
while (true) {
$this->output .= $this->a;
$this->lastByteOut = $this->a;
$this->a = $this->get();
if ($this->a === $this->b) { // end quote
break;
}
if (ord($this->a) <= self::ORD_LF) {
throw new JSMin_UnterminatedStringException(
'Unterminated String: ' . var_export($str, true));
"JSMin: Unterminated String at byte "
. $this->inputIndex . ": {$str}");
}
$str .= $this->a;
if ($this->a === '\\') {
$this->output .= $this->a;
$this->lastByteOut = $this->a;
$this->a = $this->get();
$str .= $this->a;
}
@@ -173,16 +220,21 @@ class JSMin {
$pattern .= $this->a;
} elseif (ord($this->a) <= self::ORD_LF) {
throw new JSMin_UnterminatedRegExpException(
'Unterminated RegExp: '. var_export($pattern, true));
"JSMin: Unterminated RegExp at byte "
. $this->inputIndex .": {$pattern}");
}
$this->output .= $this->a;
$this->lastByteOut = $this->a;
}
$this->b = $this->next();
}
// end case ACTION_DELETE_A_B
}
}
/**
* @return bool
*/
protected function isRegexpLiteral()
{
if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
@@ -207,9 +259,11 @@ class JSMin {
}
return false;
}
/**
* Get next char. Convert ctrl char to space.
*
* @return string
*/
protected function get()
{
@@ -231,24 +285,33 @@ class JSMin {
}
return $c;
}
/**
* Get next char. If is ctrl character, translate to a space or newline.
*
* @return string
*/
protected function peek()
{
$this->lookAhead = $this->get();
return $this->lookAhead;
}
/**
* Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
*
* @param string $c
*
* @return bool
*/
protected function isAlphaNum($c)
{
return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
}
/**
* @return string
*/
protected function singleLineComment()
{
$comment = '';
@@ -264,7 +327,11 @@ class JSMin {
}
}
}
/**
* @return string
* @throws JSMin_UnterminatedCommentException
*/
protected function multipleLineComment()
{
$this->get();
@@ -276,7 +343,7 @@ class JSMin {
$this->get();
// if comment preserved by YUI Compressor
if (0 === strpos($comment, '!')) {
return "\n/*" . substr($comment, 1) . "*/\n";
return "\n/*!" . substr($comment, 1) . "*/\n";
}
// if IE conditional comment
if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
@@ -285,15 +352,19 @@ class JSMin {
return ' ';
}
} elseif ($get === null) {
throw new JSMin_UnterminatedCommentException('Unterminated Comment: ' . var_export('/*' . $comment, true));
throw new JSMin_UnterminatedCommentException(
"JSMin: Unterminated comment at byte "
. $this->inputIndex . ": /*{$comment}");
}
$comment .= $get;
}
}
/**
* Get the next character, skipping over comments.
* Some comments may be preserved.
*
* @return string
*/
protected function next()
{