(function( jQuery ) {
-var windowData = {},
- rbrace = /^(?:\{.*\}|\[.*\])$/;
+var rbrace = /^(?:\{.*\}|\[.*\])$/;
jQuery.extend({
cache: {},
uuid: 0,
// Unique for each copy of jQuery on the page
- expando: "jQuery" + jQuery.now(),
+ // Non-digits removed to match rinlinejQuery
+ expando: "jQuery" + ( jQuery.fn.jquery + Math.random() ).replace( /\D/g, "" ),
// The following elements throw uncatchable exceptions if you
// attempt to add expando properties to them.
},
hasData: function( elem ) {
- if (elem.nodeType) {
- elem = jQuery.cache[ elem[jQuery.expando] ];
- }
+ elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
return !!elem && !jQuery.isEmptyObject(elem);
},
- data: function( elem, name, data ) {
+ data: function( elem, name, data, pvt /* Internal Use Only */ ) {
if ( !jQuery.acceptData( elem ) ) {
return;
}
- elem = elem == window ?
- windowData :
- elem;
+ var internalKey = jQuery.expando, getByName = typeof name === "string", thisCache,
+
+ // We have to handle DOM nodes and JS objects differently because IE6-7
+ // can't GC object references properly across the DOM-JS boundary
+ isNode = elem.nodeType,
+
+ // Only DOM nodes need the global jQuery cache; JS object data is
+ // attached directly to the object so GC can occur automatically
+ cache = isNode ? jQuery.cache : elem,
- var isNode = elem.nodeType,
- id = isNode ? elem[ jQuery.expando ] : null,
- cache = jQuery.cache, thisCache;
+ // Only defining an ID for JS objects if its cache already exists allows
+ // the code to shortcut on the same path as a DOM node with no cache
+ id = isNode ? elem[ jQuery.expando ] : elem[ jQuery.expando ] && jQuery.expando;
- if ( isNode && !id && typeof name === "string" && data === undefined ) {
+ // Avoid doing any more work than we need to when trying to get data on an
+ // object that has no data at all
+ if ( (!id || (pvt && id && !cache[ id ][ internalKey ])) && getByName && data === undefined ) {
return;
}
- // Get the data from the object directly
- if ( !isNode ) {
- cache = elem;
+ if ( !id ) {
+ // Only DOM nodes need a new unique ID for each element since their data
+ // ends up in the global cache
+ if ( isNode ) {
+ elem[ jQuery.expando ] = id = ++jQuery.uuid;
+ } else {
+ id = jQuery.expando;
+ }
+ }
- // Compute a unique ID for the element
- } else if ( !id ) {
- elem[ jQuery.expando ] = id = ++jQuery.uuid;
+ if ( !cache[ id ] ) {
+ // Use a Function as the cache object instead of an Object on JS objects
+ // as a hack to prevent JSON.stringify from serializing it (#8108)
+ cache[ id ] = isNode ? {} : function () {};
}
- // Avoid generating a new cache unless none exists and we
- // want to manipulate it.
- if ( typeof name === "object" ) {
- if ( isNode ) {
+ // An object can be passed to jQuery.data instead of a key/value pair; this gets
+ // shallow copied over onto the existing cache
+ if ( typeof name === "object" || typeof name === "function" ) {
+ if ( pvt ) {
+ cache[ id ][ internalKey ] = jQuery.extend(cache[ id ][ internalKey ], name);
+ } else {
cache[ id ] = jQuery.extend(cache[ id ], name);
+ }
+ }
- } else {
- jQuery.extend( cache, name );
+ thisCache = cache[ id ];
+
+ // Internal jQuery data is stored in a separate object inside the object's data
+ // cache in order to avoid key collisions between internal data and user-defined
+ // data
+ if ( pvt ) {
+ if ( !thisCache[ internalKey ] ) {
+ thisCache[ internalKey ] = {};
}
- } else if ( isNode && !cache[ id ] ) {
- cache[ id ] = {};
+ thisCache = thisCache[ internalKey ];
}
- thisCache = isNode ? cache[ id ] : cache;
-
- // Prevent overriding the named cache with undefined values
if ( data !== undefined ) {
thisCache[ name ] = data;
}
- return typeof name === "string" ? thisCache[ name ] : thisCache;
+ // TODO: This is a hack for 1.5 ONLY. It will be removed in 1.6. Users should
+ // not attempt to inspect the internal events object using jQuery.data, as this
+ // internal data object is undocumented and subject to change.
+ if ( name === "events" && !thisCache[name] ) {
+ return thisCache[ internalKey ] && thisCache[ internalKey ].events;
+ }
+
+ return getByName ? thisCache[ name ] : thisCache;
},
- removeData: function( elem, name ) {
+ removeData: function( elem, name, pvt /* Internal Use Only */ ) {
if ( !jQuery.acceptData( elem ) ) {
return;
}
- elem = elem == window ?
- windowData :
- elem;
+ var internalKey = jQuery.expando, isNode = elem.nodeType,
- var isNode = elem.nodeType,
- id = isNode ? elem[ jQuery.expando ] : elem,
- cache = jQuery.cache,
- thisCache = isNode ? cache[ id ] : id;
+ // See jQuery.data for more information
+ cache = isNode ? jQuery.cache : elem,
+
+ // See jQuery.data for more information
+ id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
+
+ // If there is already no cache entry for this object, there is no
+ // purpose in continuing
+ if ( !cache[ id ] ) {
+ return;
+ }
- // If we want to remove a specific section of the element's data
if ( name ) {
+ var thisCache = pvt ? cache[ id ][ internalKey ] : cache[ id ];
+
if ( thisCache ) {
- // Remove the section of cache data
delete thisCache[ name ];
- // If we've removed all the data, remove the element's cache
- if ( isNode && jQuery.isEmptyObject(thisCache) ) {
- jQuery.removeData( elem );
+ // If there is no data left in the cache, we want to continue
+ // and let the cache object itself get destroyed
+ if ( !jQuery.isEmptyObject(thisCache) ) {
+ return;
}
}
+ }
+
+ // See jQuery.data for more information
+ if ( pvt ) {
+ delete cache[ id ][ internalKey ];
+
+ // Don't destroy the parent cache unless the internal data object
+ // had been the only thing left in it
+ if ( !jQuery.isEmptyObject(cache[ id ]) ) {
+ return;
+ }
+ }
+
+ var internalCache = cache[ id ][ internalKey ];
- // Otherwise, we want to remove all of the element's data
+ // Browsers that fail expando deletion also refuse to delete expandos on
+ // the window, but it will allow it on all other JS objects; other browsers
+ // don't care
+ if ( jQuery.support.deleteExpando || cache != window ) {
+ delete cache[ id ];
} else {
- if ( isNode && jQuery.support.deleteExpando ) {
- delete elem[ jQuery.expando ];
+ cache[ id ] = null;
+ }
+ // We destroyed the entire user cache at once because it's faster than
+ // iterating through each key, but we need to continue to persist internal
+ // data if it existed
+ if ( internalCache ) {
+ cache[ id ] = {};
+ cache[ id ][ internalKey ] = internalCache;
+
+ // Otherwise, we need to eliminate the expando on the node to avoid
+ // false lookups in the cache for entries that no longer exist
+ } else if ( isNode ) {
+ // IE does not allow us to delete expando properties from nodes,
+ // nor does it have a removeAttribute function on Document nodes;
+ // we must handle all of these cases
+ if ( jQuery.support.deleteExpando ) {
+ delete elem[ jQuery.expando ];
} else if ( elem.removeAttribute ) {
elem.removeAttribute( jQuery.expando );
-
- // Completely remove the data cache
- } else if ( isNode ) {
- delete cache[ id ];
-
- // Remove all fields from the object
} else {
- for ( var n in elem ) {
- delete elem[ n ];
- }
+ elem[ jQuery.expando ] = null;
}
}
},
+ // For internal use only.
+ _data: function( elem, name, data ) {
+ return jQuery.data( elem, name, data, true );
+ },
+
// A method for determining if a DOM node can handle the data expando
acceptData: function( elem ) {
if ( elem.nodeName ) {
git.asbjorn.biz / jquery.git / blobdiff