| 1 | import * as is from '../is';
|
| 2 | import * as util from '../util';
|
| 3 |
|
| 4 | let cache = function( fn, name ){
|
| 5 | return function traversalCache( arg1, arg2, arg3, arg4 ){
|
| 6 | let selectorOrEles = arg1;
|
| 7 | let eles = this;
|
| 8 | let key;
|
| 9 |
|
| 10 | if( selectorOrEles == null ){
|
| 11 | key = '';
|
| 12 | } else if( is.elementOrCollection( selectorOrEles ) && selectorOrEles.length === 1 ){
|
| 13 | key = selectorOrEles.id();
|
| 14 | }
|
| 15 |
|
| 16 | if( eles.length === 1 && key ){
|
| 17 | let _p = eles[0]._private;
|
| 18 | let tch = _p.traversalCache = _p.traversalCache || {};
|
| 19 | let ch = tch[ name ] = tch[ name ] || [];
|
| 20 | let hash = util.hashString( key );
|
| 21 | let cacheHit = ch[ hash ];
|
| 22 |
|
| 23 | if( cacheHit ){
|
| 24 | return cacheHit;
|
| 25 | } else {
|
| 26 | return ( ch[ hash ] = fn.call( eles, arg1, arg2, arg3, arg4 ) );
|
| 27 | }
|
| 28 | } else {
|
| 29 | return fn.call( eles, arg1, arg2, arg3, arg4 );
|
| 30 | }
|
| 31 | };
|
| 32 | };
|
| 33 |
|
| 34 | export default cache;
|