*/
class JSMin {
- const ORD_LF = 10;
- const ORD_SPACE = 32;
-
- protected $a = '';
- protected $b = '';
- protected $input = '';
- protected $inputIndex = 0;
- protected $inputLength = 0;
- protected $lookAhead = null;
- protected $output = '';
-
- // -- Public Static Methods --------------------------------------------------
-
- public static function minify($js) {
- $jsmin = new JSMin($js);
- return $jsmin->min();
- }
-
- // -- Public Instance Methods ------------------------------------------------
-
- public function __construct($input) {
- $this->input = str_replace("\r\n", "\n", $input);
- $this->inputLength = strlen($this->input);
- }
-
- // -- 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();
- }
- }
- }
-
- 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) {
- $c = substr($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 $c;
- }
-
- return ' ';
- }
-
- protected function isAlphaNum($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() {
- $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;
- }
-
- protected function peek() {
- $this->lookAhead = $this->get();
- return $this->lookAhead;
- }
+ const ORD_LF = 10;
+ const ORD_SPACE = 32;
+
+ protected $a = '';
+ protected $b = '';
+ protected $input = '';
+ protected $inputIndex = 0;
+ protected $inputLength = 0;
+ protected $lookAhead = null;
+ protected $output = '';
+
+ // -- Public Static Methods --------------------------------------------------
+
+ public static function minify( $js ) {
+ $jsmin = new JSMin( $js );
+ return $jsmin->min();
+ }
+
+ // -- Public Instance Methods ------------------------------------------------
+
+ public function __construct( $input ) {
+ $this->input = str_replace( "\r\n", "\n", $input );
+ $this->inputLength = strlen( $this->input );
+ }
+
+ // -- 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();
+ }
+ }
+ }
+
+ 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 = 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 ' ';
+ }
+
+ 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() {
+ $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;
+ }
+
+ protected function peek() {
+ $this->lookAhead = $this->get();
+ return $this->lookAhead;
+ }
}
// -- Exceptions ---------------------------------------------------------------
class JSMinException extends Exception {}
-?>
\ No newline at end of file
+?>