JSMinifier.class.php (1639B)
1 <?php 2 3 namespace util; 4 5 class JSMinifier 6 { 7 const FLAG_IMPORT_MIN_JS = 1; 8 const FLAG_REMOVE_MULTILINE_COMMENT = 2; 9 const FLAG_REMOVE_BLANK_LINES = 4; 10 const FLAG_REMOVE_LINE_COMMENTS = 8; 11 const FLAG_REMOVE_WHITESPACE = 16; 12 const FLAG_REMOVE_LINEBREAK = 32; 13 const FLAG_REMOVE_TABS = 64; 14 const FLAG_REMOVE_SUPERFLOUS_SPACES = 128; 15 const FLAG_ALL = 255; 16 17 const REPLACER = [ 18 self::FLAG_REMOVE_MULTILINE_COMMENT => ["/\/\*[\s\S]*?\*\//" , '' ], 19 self::FLAG_REMOVE_LINE_COMMENTS => ["/^(.*)\/\/.*$/m" ,'${1}' ], 20 self::FLAG_REMOVE_BLANK_LINES => ['/^\n+|^[\t\s]*\n+/m' , '' ], 21 self::FLAG_IMPORT_MIN_JS => ['/^(import.*from.*)\.js(.*)$/m','${1}.min.js${2}' ], 22 self::FLAG_REMOVE_WHITESPACE => ['/^\s*(.*)\s*$/m' ,'${1}' ], 23 self::FLAG_REMOVE_LINEBREAK => ['/\n/' ,'' ], 24 self::FLAG_REMOVE_TABS => ['/\t/' ,'' ], 25 self::FLAG_REMOVE_SUPERFLOUS_SPACES => ['/\s{2,}7' ,' ' ], 26 ]; 27 28 /** 29 * Which flags are enabled? 30 * @var int 31 */ 32 public $config = self::FLAG_ALL; 33 34 public function __construct( $flags = null ) 35 { 36 if ( $flags ) 37 $this->config = $flags; 38 } 39 40 41 public function minify( $code ) { 42 foreach( self::REPLACER as $flag => $replacer ) 43 if ( $this->config & $flag ) { 44 list( $replace, $with ) = $replacer; 45 $code = preg_replace( $replace, $with, $code ); 46 } 47 return $code; 48 } 49 }