Function processItemKey

jquery.tmpl.js:400–451

( el )

			processItemKey( elem );
		}
		function processItemKey( el ) {
			var pntKey, pntNode = el, pntItem, tmplItem, key;
			// Ensure that each rendered template inserted into the DOM has its own template item,
			if ( (key = el.getAttribute( tmplItmAtt ))) {
				while ( pntNode.parentNode && (pntNode = pntNode.parentNode).nodeType === 1 && !(pntKey = pntNode.getAttribute( tmplItmAtt ))) { }
				if ( pntKey !== key ) {
					// The next ancestor with a _tmplitem expando is on a different key than this one.
					// So this is a top-level element within this template item
					// Set pntNode to the key of the parentNode, or to 0 if pntNode.parentNode is null, or pntNode is a fragment.
					pntNode = pntNode.parentNode ? (pntNode.nodeType === 11 ? 0 : (pntNode.getAttribute( tmplItmAtt ) || 0)) : 0;
					if ( !(tmplItem = newTmplItems[key]) ) {
						// The item is for wrapped content, and was copied from the temporary parent wrappedItem.
						tmplItem = wrappedItems[key];
						tmplItem = newTmplItem( tmplItem, newTmplItems[pntNode]||wrappedItems[pntNode] );
						tmplItem.key = ++itemKey;
						newTmplItems[itemKey] = tmplItem;
					}
					if ( cloneIndex ) {
						cloneTmplItem( key );
					}
				}
				el.removeAttribute( tmplItmAtt );
			} else if ( cloneIndex && (tmplItem = jQuery.data( el, "tmplItem" )) ) {
				// This was a rendered element, cloned during append or appendTo etc.
				// TmplItem stored in jQuery data has already been cloned in cloneCopyEvent. We must replace it with a fresh cloned tmplItem.
				cloneTmplItem( tmplItem.key );
				newTmplItems[tmplItem.key] = tmplItem;
				pntNode = jQuery.data( el.parentNode, "tmplItem" );
				pntNode = pntNode ? pntNode.key : 0;
			}
			if ( tmplItem ) {
				pntItem = tmplItem;
				// Find the template item of the parent element.
				// (Using !=, not !==, since pntItem.key is number, and pntNode may be a string)
				while ( pntItem && pntItem.key != pntNode ) {
					// Add this element as a top-level node for this rendered template item, as well as for any
					// ancestor items between this item and the item of its parent element
					pntItem.nodes.push( el );
					pntItem = pntItem.parent;
				}
				// Delete content built during rendering - reduce API surface area and memory use, and avoid exposing of stale data after rendering...
				delete tmplItem._ctnt;
				delete tmplItem._wrap;
				// Store template item as jQuery data on the element
				jQuery.data( el, "tmplItem", tmplItem );
			}
			function cloneTmplItem( key ) {
				key = key + keySuffix;
				tmplItem = newClonedItems[key] =
					(newClonedItems[key] || newTmplItem( tmplItem, newTmplItems[tmplItem.parent.key + keySuffix] || tmplItem.parent ));
			}
		}
	}

	//---- Helper functions for template item ----