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 ];\r
  12 \r
  13                 // Compute a unique ID for the element\r
  14                 if ( !id )\r
  15                         id = elem[ expando ] = ++uuid;\r
  16 \r
  17                 // Only generate the data cache if we're\r
  18                 // trying to access or manipulate it\r
  19                 if ( name && !jQuery.cache[ id ] )\r
  20                         jQuery.cache[ id ] = {};\r
  21 \r
  22                 // Prevent overriding the named cache with undefined values\r
  23                 if ( data !== undefined )\r
  24                         jQuery.cache[ id ][ name ] = data;\r
  25 \r
  26                 if(name === true) return jQuery.cache[ id ]\r
  27 \r
  28                 // Return the named cache data, or the ID for the element\r
  29                 return name ?\r
  30                         jQuery.cache[ id ][ name ] :\r
  31                         id;\r
  32         },\r
  33 \r
  34         removeData: function( elem, name ) {\r
  35                 elem = elem == window ?\r
  36                         windowData :\r
  37                         elem;\r
  38 \r
  39                 var id = elem[ expando ];\r
  40 \r
  41                 // If we want to remove a specific section of the element's data\r
  42                 if ( name ) {\r
  43                         if ( jQuery.cache[ id ] ) {\r
  44                                 // Remove the section of cache data\r
  45                                 delete jQuery.cache[ id ][ name ];\r
  46 \r
  47                                 // If we've removed all the data, remove the element's cache\r
  48                                 name = "";\r
  49 \r
  50                                 for ( name in jQuery.cache[ id ] )\r
  51                                         break;\r
  52 \r
  53                                 if ( !name )\r
  54                                         jQuery.removeData( elem );\r
  55                         }\r
  56 \r
  57                 // Otherwise, we want to remove all of the element's data\r
  58                 } else {\r
  59                         // Clean up the element expando\r
  60                         try {\r
  61                                 delete elem[ expando ];\r
  62                         } catch(e){\r
  63                                 // IE has trouble directly removing the expando\r
  64                                 // but it's ok with using removeAttribute\r
  65                                 if ( elem.removeAttribute )\r
  66                                         elem.removeAttribute( expando );\r
  67                         }\r
  68 \r
  69                         // Completely remove the data cache\r
  70                         delete jQuery.cache[ id ];\r
  71                 }\r
  72         },\r
  73         queue: function( elem, type, data ) {\r
  74                 if ( elem ){\r
  75 \r
  76                         type = (type || "fx") + "queue";\r
  77 \r
  78                         var q = jQuery.data( elem, type );\r
  79 \r
  80                         if ( !q || jQuery.isArray(data) )\r
  81                                 q = jQuery.data( elem, type, jQuery.makeArray(data) );\r
  82                         else if( data )\r
  83                                 q.push( data );\r
  84 \r
  85                 }\r
  86                 return q;\r
  87         },\r
  88 \r
  89         dequeue: function( elem, type ){\r
  90                 var queue = jQuery.queue( elem, type ),\r
  91                         fn = queue.shift();\r
  92 \r
  93                 if( !type || type === "fx" )\r
  94                         fn = queue[0];\r
  95 \r
  96                 if( fn !== undefined )\r
  97                         fn.call(elem, function() { jQuery(elem).dequeue(type); });\r
  98         }\r
  99 });\r
 100 \r
 101 jQuery.fn.extend({\r
 102         data: function( key, value ){\r
 103                 if(typeof key === "undefined" && this.length) return jQuery.data(this[0], true);\r
 104 \r
 105                 var parts = key.split(".");\r
 106                 parts[1] = parts[1] ? "." + parts[1] : "";\r
 107 \r
 108                 if ( value === undefined ) {\r
 109                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);\r
 110 \r
 111                         if ( data === undefined && this.length )\r
 112                                 data = jQuery.data( this[0], key );\r
 113 \r
 114                         return data === undefined && parts[1] ?\r
 115                                 this.data( parts[0] ) :\r
 116                                 data;\r
 117                 } else\r
 118                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){\r
 119                                 jQuery.data( this, key, value );\r
 120                         });\r
 121         },\r
 122 \r
 123         removeData: function( key ){\r
 124                 return this.each(function(){\r
 125                         jQuery.removeData( this, key );\r
 126                 });\r
 127         },\r
 128         queue: function(type, data){\r
 129                 if ( typeof type !== "string" ) {\r
 130                         data = type;\r
 131                         type = "fx";\r
 132                 }\r
 133 \r
 134                 if ( data === undefined )\r
 135                         return jQuery.queue( this[0], type );\r
 136 \r
 137                 return this.each(function(i, elem){\r
 138                         var queue = jQuery.queue( this, type, data );\r
 139 \r
 140                         if( type == "fx" && queue.length == 1 )\r
 141                                 queue[0].call(this, function() { jQuery(elem).dequeue(type); });\r
 142                 });\r
 143         },\r
 144         dequeue: function(type){\r
 145                 return this.each(function(){\r
 146                         jQuery.dequeue( this, type );\r
 147                 });\r
 148         },\r
 149         clearQueue: function(type){\r
 150                 return this.queue( type || "fx", [] );\r
 151         }\r
 152 });