src/data.js

   1 var expando = "jQuery" + now(), uuid = 0, windowData = {};\r
   2 \r
   3 jQuery.extend({\r
   4         cache: {},\r
   5 \r
   6         data: function( elem, name, data ) {\r
   7                 elem = elem == window ?\r
   8                         windowData :\r
   9                         elem;\r
  10 \r
  11                 var id = elem[ expando ], cache = jQuery.cache;\r
  12 \r
  13                 // Compute a unique ID for the element\r
  14                 if(!id) id = elem[ expando ] = ++uuid;\r
  15 \r
  16                 // Only generate the data cache if we're\r
  17                 // trying to access or manipulate it\r
  18                 if ( name && !cache[ id ] )\r
  19                         cache[ id ] = {};\r
  20 \r
  21                 var thisCache = cache[ id ];\r
  22 \r
  23                 // Prevent overriding the named cache with undefined values\r
  24                 if ( data !== undefined ) thisCache[ name ] = data;\r
  25 \r
  26                 if(name === true) return thisCache\r
  27                 else if(name) return thisCache[name]\r
  28                 else return id\r
  29         },\r
  30 \r
  31         removeData: function( elem, name ) {\r
  32                 elem = elem == window ?\r
  33                         windowData :\r
  34                         elem;\r
  35 \r
  36                 var id = elem[ expando ], cache = jQuery.cache, thisCache = cache[ id ];\r
  37 \r
  38                 // If we want to remove a specific section of the element's data\r
  39                 if ( name ) {\r
  40                         if ( thisCache ) {\r
  41                                 // Remove the section of cache data\r
  42                                 delete thisCache[ name ];\r
  43 \r
  44                                 // If we've removed all the data, remove the element's cache\r
  45                                 if( jQuery.isEmptyObject(thisCache) )\r
  46                                         jQuery.removeData( elem );\r
  47                         }\r
  48 \r
  49                 // Otherwise, we want to remove all of the element's data\r
  50                 } else {\r
  51                         // Clean up the element expando\r
  52                         try {\r
  53                                 delete elem[ expando ];\r
  54                         } catch(e){\r
  55                                 // IE has trouble directly removing the expando\r
  56                                 // but it's ok with using removeAttribute\r
  57                                 if ( elem.removeAttribute )\r
  58                                         elem.removeAttribute( expando );\r
  59                         }\r
  60 \r
  61                         // Completely remove the data cache\r
  62                         delete cache[ id ];\r
  63                 }\r
  64         },\r
  65         queue: function( elem, type, data ) {\r
  66                 if ( elem ){\r
  67 \r
  68                         type = (type || "fx") + "queue";\r
  69 \r
  70                         var q = jQuery.data( elem, type );\r
  71 \r
  72                         if ( !q || jQuery.isArray(data) )\r
  73                                 q = jQuery.data( elem, type, jQuery.makeArray(data) );\r
  74                         else if( data )\r
  75                                 q.push( data );\r
  76 \r
  77                 }\r
  78                 return q;\r
  79         },\r
  80 \r
  81         dequeue: function( elem, type ){\r
  82                 var queue = jQuery.queue( elem, type ),\r
  83                         fn = queue.shift();\r
  84 \r
  85                 if( !type || type === "fx" )\r
  86                         fn = queue[0];\r
  87 \r
  88                 if( fn !== undefined )\r
  89                         fn.call(elem, function() { jQuery(elem).dequeue(type); });\r
  90         }\r
  91 });\r
  92 \r
  93 jQuery.fn.extend({\r
  94         data: function( key, value ){\r
  95                 if(typeof key === "undefined" && this.length) return jQuery.data(this[0], true);\r
  96 \r
  97                 var parts = key.split(".");\r
  98                 parts[1] = parts[1] ? "." + parts[1] : "";\r
  99 \r
 100                 if ( value === undefined ) {\r
 101                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);\r
 102 \r
 103                         if ( data === undefined && this.length )\r
 104                                 data = jQuery.data( this[0], key );\r
 105 \r
 106                         return data === undefined && parts[1] ?\r
 107                                 this.data( parts[0] ) :\r
 108                                 data;\r
 109                 } else\r
 110                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){\r
 111                                 jQuery.data( this, key, value );\r
 112                         });\r
 113         },\r
 114 \r
 115         removeData: function( key ){\r
 116                 return this.each(function(){\r
 117                         jQuery.removeData( this, key );\r
 118                 });\r
 119         },\r
 120         queue: function(type, data){\r
 121                 if ( typeof type !== "string" ) {\r
 122                         data = type;\r
 123                         type = "fx";\r
 124                 }\r
 125 \r
 126                 if ( data === undefined )\r
 127                         return jQuery.queue( this[0], type );\r
 128 \r
 129                 return this.each(function(i, elem){\r
 130                         var queue = jQuery.queue( this, type, data );\r
 131 \r
 132                         if( type == "fx" && queue.length == 1 )\r
 133                                 queue[0].call(this, function() { jQuery(elem).dequeue(type); });\r
 134                 });\r
 135         },\r
 136         dequeue: function(type){\r
 137                 return this.each(function(){\r
 138                         jQuery.dequeue( this, type );\r
 139                 });\r
 140         },\r
 141         clearQueue: function(type){\r
 142                 return this.queue( type || "fx", [] );\r
 143         }\r
 144 });