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V 3.5 RC 1

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Romain Neutron
2011-12-05 00:23:28 +01:00
parent 6f1ee368aa
commit 4c5b7eb658
5563 changed files with 466984 additions and 985416 deletions
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509
www/include/minify/lib/JSMin.php
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@@ -6,16 +6,11 @@
* 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.
*
*
* 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.
*
* Known issue: regular expressions containing quote characters must be proceeded
* by one of the following characters: (,=:[!&|?
* E.g. JSMin will fail on the following: return /'/;
* The simple workaround is to wrap the expression in parenthesis: return (/'/);
*
* PHP 5 or higher is required.
*
* Permission is hereby granted to use this version of the library under the
@@ -46,268 +41,286 @@
* --
*
* @package JSMin
* @author Ryan Grove <ryan@wonko.com>
* @author Steve Clay <steve@mrclay.org> (modifications)
* @author Ryan Grove <ryan@wonko.com> (PHP port)
* @author Steve Clay <steve@mrclay.org> (modifications + cleanup)
* @author Andrea Giammarchi <http://www.3site.eu> (spaceBeforeRegExp)
* @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 http://code.google.com/p/jsmin-php/
*/
class JSMin {
const ORD_LF = 10;
const ORD_SPACE = 32;
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 = '';
protected $a = "\n";
protected $b = '';
protected $input = '';
protected $inputIndex = 0;
protected $inputLength = 0;
protected $lookAhead = null;
protected $output = '';
// -- Public Static Methods --------------------------------------------------
/**
* Minify Javascript
*
* @param string $js Javascript to be minified
* @return string
*/
public static function minify($js)
{
$jsmin = new JSMin($js);
public static function minify($js) {
$jsmin = new JSMin($js);
return $jsmin->min();
}
return $jsmin->min();
}
// -- Public Instance Methods ------------------------------------------------
/**
* Setup process
*/
public function __construct($input)
{
$this->input = str_replace("\r\n", "\n", $input);
$this->inputLength = strlen($this->input);
}
public function __construct($input) {
$this->input = str_replace("\r\n", "\n", $input);
$this->inputLength = strlen($this->input);
}
/**
* Perform minification, return result
*/
public function min()
{
if ($this->output !== '') { // min already run
// -- Protected Instance Methods ---------------------------------------------
protected function action($d) {
switch($d) {
case 1:
$this->output .= $this->a;
case 2:
$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();
}
}
return $this->output;
}
$this->action(self::ACTION_DELETE_A_B);
case 3:
$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->output .= $this->a . $this->b;
for (;;) {
$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 '.
'literal.');
}
$this->output .= $this->a;
}
$this->b = $this->next();
}
}
}
protected function get() {
$c = $this->lookAhead;
$this->lookAhead = null;
if ($c === null) {
if ($this->inputIndex < $this->inputLength) {
$c = $this->input[$this->inputIndex];
$this->inputIndex += 1;
} else {
$c = null;
}
}
if ($c === "\r") {
return "\n";
}
if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {
return $c;
}
return ' ';
}
protected function isAlphaNum($c) {
return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;
}
protected function min() {
$this->a = "\n";
$this->action(3);
while ($this->a !== null) {
switch ($this->a) {
case ' ':
if ($this->isAlphaNum($this->b)) {
$this->action(1);
} else {
$this->action(2);
}
break;
case "\n":
switch ($this->b) {
case '{':
case '[':
case '(':
case '+':
case '-':
$this->action(1);
break;
case ' ':
$this->action(3);
break;
default:
if ($this->isAlphaNum($this->b)) {
$this->action(1);
}
else {
$this->action(2);
}
}
break;
default:
switch ($this->b) {
case ' ':
if ($this->isAlphaNum($this->a)) {
$this->action(1);
break;
}
$this->action(3);
break;
case "\n":
switch ($this->a) {
case '}':
case ']':
case ')':
case '+':
case '-':
case '"':
case "'":
$this->action(1);
break;
default:
if ($this->isAlphaNum($this->a)) {
$this->action(1);
}
else {
$this->action(3);
}
}
break;
default:
$this->action(1);
break;
}
}
}
return $this->output;
}
protected function next() {
$get = $this->get();
if ($get === '/') {
$commentContents = '';
switch($this->peek()) {
case '/':
// "//" comment
for (;;) {
$get = $this->get();
$commentContents .= $get;
if (ord($get) <= self::ORD_LF) {
return preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $commentContents)
? "/{$commentContents}"
: $get;
}
}
case '*':
// "/* */" comment
$this->get();
for (;;) {
$get = $this->get();
switch($get) {
case '*':
if ($this->peek() === '/') {
$this->get();
if (0 === strpos($commentContents, '!')) {
// YUI Compressor style
return "\n/*" . substr($commentContents, 1) . "*/\n";
}
return preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $commentContents)
? "/*{$commentContents}*/" // IE conditional compilation
: ' ';
while ($this->a !== null) {
// determine next command
$command = self::ACTION_KEEP_A; // default
if ($this->a === ' ') {
if (! $this->isAlphaNum($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)) {
$command = self::ACTION_DELETE_A;
}
} elseif (! $this->isAlphaNum($this->a)) {
if ($this->b === ' '
|| ($this->b === "\n"
&& (false === strpos('}])+-"\'', $this->a)))) {
$command = self::ACTION_DELETE_A_B;
}
break;
case null:
throw new JSMinException('Unterminated comment.');
}
$commentContents .= $get;
}
$this->action($command);
}
$this->output = trim($this->output);
default:
return $get;
}
return $this->output;
}
return $get;
}
/**
* ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
* ACTION_DELETE_A = Copy B to A. Get the next B.
* ACTION_DELETE_A_B = Get the next B.
*/
protected function action($command)
{
switch ($command) {
case self::ACTION_KEEP_A:
$this->output .= $this->a;
// fallthrough
case self::ACTION_DELETE_A:
$this->a = $this->b;
if ($this->a === "'" || $this->a === '"') { // string literal
$str = $this->a; // in case needed for exception
while (true) {
$this->output .= $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));
}
$str .= $this->a;
if ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
$str .= $this->a;
}
}
}
// fallthrough
case self::ACTION_DELETE_A_B:
$this->b = $this->next();
if ($this->b === '/' && $this->isRegexpLiteral()) { // RegExp literal
$this->output .= $this->a . $this->b;
$pattern = '/'; // in case needed for exception
while (true) {
$this->a = $this->get();
$pattern .= $this->a;
if ($this->a === '/') { // end pattern
break; // while (true)
} elseif ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
$pattern .= $this->a;
} elseif (ord($this->a) <= self::ORD_LF) {
throw new JSMin_UnterminatedRegExpException(
'Unterminated RegExp: '. var_export($pattern, true));
}
$this->output .= $this->a;
}
$this->b = $this->next();
}
// end case ACTION_DELETE_A_B
}
}
protected function peek() {
$this->lookAhead = $this->get();
return $this->lookAhead;
}
protected function isRegexpLiteral()
{
if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
return true;
}
if (' ' === $this->a) {
$length = strlen($this->output);
if ($length < 2) { // weird edge case
return true;
}
// you can't divide a keyword
if (preg_match('/(?:case|else|in|return|typeof)$/', $this->output, $m)) {
if ($this->output === $m[0]) { // odd but could happen
return true;
}
// make sure it's a keyword, not end of an identifier
$charBeforeKeyword = substr($this->output, $length - strlen($m[0]) - 1, 1);
if (! $this->isAlphaNum($charBeforeKeyword)) {
return true;
}
}
}
return false;
}
/**
* Get next char. Convert ctrl char to space.
*/
protected function get()
{
$c = $this->lookAhead;
$this->lookAhead = null;
if ($c === null) {
if ($this->inputIndex < $this->inputLength) {
$c = $this->input[$this->inputIndex];
$this->inputIndex += 1;
} else {
return null;
}
}
if ($c === "\r" || $c === "\n") {
return "\n";
}
if (ord($c) < self::ORD_SPACE) { // control char
return ' ';
}
return $c;
}
/**
* Get next char. If is ctrl character, translate to a space or newline.
*/
protected function peek()
{
$this->lookAhead = $this->get();
return $this->lookAhead;
}
/**
* Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
*/
protected function isAlphaNum($c)
{
return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
}
protected function singleLineComment()
{
$comment = '';
while (true) {
$get = $this->get();
$comment .= $get;
if (ord($get) <= self::ORD_LF) { // EOL reached
// if IE conditional comment
if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
return "/{$comment}";
}
return $get;
}
}
}
protected function multipleLineComment()
{
$this->get();
$comment = '';
while (true) {
$get = $this->get();
if ($get === '*') {
if ($this->peek() === '/') { // end of comment reached
$this->get();
// if comment preserved by YUI Compressor
if (0 === strpos($comment, '!')) {
return "\n/*" . substr($comment, 1) . "*/\n";
}
// if IE conditional comment
if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
return "/*{$comment}*/";
}
return ' ';
}
} elseif ($get === null) {
throw new JSMin_UnterminatedCommentException('Unterminated Comment: ' . var_export('/*' . $comment, true));
}
$comment .= $get;
}
}
/**
* Get the next character, skipping over comments.
* Some comments may be preserved.
*/
protected function next()
{
$get = $this->get();
if ($get !== '/') {
return $get;
}
switch ($this->peek()) {
case '/': return $this->singleLineComment();
case '*': return $this->multipleLineComment();
default: return $get;
}
}
}
// -- Exceptions ---------------------------------------------------------------
class JSMinException extends Exception {}
?>
class JSMin_UnterminatedStringException extends Exception {}
class JSMin_UnterminatedCommentException extends Exception {}
class JSMin_UnterminatedRegExpException extends Exception {}