0.6.x/js/core/06_XEventDispatcher.js

   1 X.EventDispatcher = ( function(){\r
   2         var LIST = [], TEMP = [], once;\r
   3         \r
   4         function getList( instance, type, create ){\r
   5                 var i = LIST.indexOf( instance ),\r
   6                         data, list;\r
   7                 if( i === -1 ){\r
   8                         if( !create ) return;\r
   9                         LIST[ LIST.length ] = instance;\r
  10                         TEMP[ TEMP.length ] = data = {};\r
  11                         if( window[ 'AbstractDisplayNode' ] && instance.instanceOf && instance.instanceOf( window[ 'AbstractDisplayNode' ] ) ){\r
  12                                 X.Class._getPrivate( instance ).events = data;\r
  13                         };\r
  14                 } else {\r
  15                         data = TEMP[ i ];\r
  16                 };\r
  17                 list = data[ type ];\r
  18                 if( !create || list ) return list;\r
  19                 list = data[ type ] = [];\r
  20                 list.data = data;\r
  21                 return list;\r
  22         };\r
  23         \r
  24         function exist( list, arg1, arg2 ){\r
  25                 for( var i = list.length; i; ){\r
  26                         if( list[ --i ].same( arg1, arg2 ) === true ) return i;\r
  27                 };\r
  28                 return -1;\r
  29         };\r
  30         \r
  31         return X.Class.create(\r
  32                 'EventDispatcher',\r
  33                 {\r
  34                         listen : function( type, arg1, arg2 ){\r
  35                                 var list = getList( this, type, true );\r
  36                                 if( list.length && exist( list, arg1, arg2 ) !== -1 ) return this;\r
  37                                 list[ list.length ] = X.Callback[ once === true ? 'once' : 'create' ]( arg1, arg2 );\r
  38                                 return this;\r
  39                         },\r
  40                         listenOnce : function( type, arg1, arg2 ){\r
  41                                 once = true;\r
  42                                 X.EventDispatcher.prototype.listen.call( this, type, arg1, arg2 );\r
  43                                 once = false;\r
  44                                 return this;\r
  45                         },\r
  46                         unlisten : function( type, arg1, arg2 ){\r
  47                                 var list = getList( this, type ),\r
  48                                         list, i;\r
  49                                 if( !list ) return this;\r
  50                                 i = exist( list, arg1, arg2 );\r
  51                                 if( i !== -1 ){\r
  52                                         list[ i ].kill();\r
  53                                         list.splice( i, 1 );\r
  54                                         if( list.length === 0 ){\r
  55                                                 list.data[ e.type ] = void 0;\r
  56                                                 delete list.data;\r
  57                                         };\r
  58                                 };\r
  59                                 return this;\r
  60                         },\r
  61                         listening : function( type, arg1, arg2 ){\r
  62                                 var list = getList( this, type );\r
  63                                 if( !list ) return false;\r
  64                                 return exist( list, arg1, arg2 ) !== -1;\r
  65                         },\r
  66                         dispatch : function( e ){\r
  67                                 // dispatch 中の listen は？\r
  68                                 var list = getList( this, e.type ),\r
  69                                         i, f, ret, sysOnly, _ret;\r
  70                                 if( !list ) return;\r
  71                                 for( i = list.length; i; ){\r
  72                                         f = list[ --i ];\r
  73                                         // once の場合リストから削除してからファイア\r
  74                                         if( f.once === true ){\r
  75                                                 list.splice( i, 1 );\r
  76                                                 ret = f( e );\r
  77                                         } else {\r
  78                                                 ret = f( e );\r
  79                                                 if( ret === false || ret & X.Callback.UN_LISTEN ){\r
  80                                                         list.splice( i, 1 );\r
  81                                                         f.kill();\r
  82                                                 };\r
  83                                         };\r
  84                                         if( list.length === 0 ){\r
  85                                                 list.data[ e.type ] = void 0;\r
  86                                                 delete list.data;\r
  87                                         };\r
  88                                         if( ret & X.Callback.STOP_NOW ){\r
  89                                                 sysOnly = true;\r
  90                                         };\r
  91                                         _ret |= ret;\r
  92                                 };\r
  93                                 return _ret;\r
  94                         }\r
  95                 }//, onKillCallback( instance )\r
  96         );\r
  97 })();\r
  98 \r
  99 \r