* A low-level selection function that works with jQuery's compiled * selector functions * @param {String|Function} selector A selector or a pre-compiled * selector function built with jQuery selector compile * @param {Element} context * @param {Array} [results] * @param {Array} [seed] A set
( selector, context, results, seed )
| 1286 | * @param {Array} [seed] A set of elements to match against |
| 1287 | */ |
| 1288 | function select( selector, context, results, seed ) { |
| 1289 | var i, tokens, token, type, find, |
| 1290 | compiled = typeof selector === "function" && selector, |
| 1291 | match = !seed && tokenize( ( selector = compiled.selector || selector ) ); |
| 1292 | |
| 1293 | results = results || []; |
| 1294 | |
| 1295 | // Try to minimize operations if there is only one selector in the list and no seed |
| 1296 | // (the latter of which guarantees us context) |
| 1297 | if ( match.length === 1 ) { |
| 1298 | |
| 1299 | // Reduce context if the leading compound selector is an ID |
| 1300 | tokens = match[ 0 ] = match[ 0 ].slice( 0 ); |
| 1301 | if ( tokens.length > 2 && ( token = tokens[ 0 ] ).type === "ID" && |
| 1302 | context.nodeType === 9 && documentIsHTML && |
| 1303 | jQuery.expr.relative[ tokens[ 1 ].type ] ) { |
| 1304 | |
| 1305 | context = ( jQuery.expr.find.ID( |
| 1306 | unescapeSelector( token.matches[ 0 ] ), |
| 1307 | context |
| 1308 | ) || [] )[ 0 ]; |
| 1309 | if ( !context ) { |
| 1310 | return results; |
| 1311 | |
| 1312 | // Precompiled matchers will still verify ancestry, so step up a level |
| 1313 | } else if ( compiled ) { |
| 1314 | context = context.parentNode; |
| 1315 | } |
| 1316 | |
| 1317 | selector = selector.slice( tokens.shift().value.length ); |
| 1318 | } |
| 1319 | |
| 1320 | // Fetch a seed set for right-to-left matching |
| 1321 | i = matchExpr.needsContext.test( selector ) ? 0 : tokens.length; |
| 1322 | while ( i-- ) { |
| 1323 | token = tokens[ i ]; |
| 1324 | |
| 1325 | // Abort if we hit a combinator |
| 1326 | if ( jQuery.expr.relative[ ( type = token.type ) ] ) { |
| 1327 | break; |
| 1328 | } |
| 1329 | if ( ( find = jQuery.expr.find[ type ] ) ) { |
| 1330 | |
| 1331 | // Search, expanding context for leading sibling combinators |
| 1332 | if ( ( seed = find( |
| 1333 | unescapeSelector( token.matches[ 0 ] ), |
| 1334 | rsibling.test( tokens[ 0 ].type ) && |
| 1335 | testContext( context.parentNode ) || context |
| 1336 | ) ) ) { |
| 1337 | |
| 1338 | // If seed is empty or no tokens remain, we can return early |
| 1339 | tokens.splice( i, 1 ); |
| 1340 | selector = seed.length && toSelector( tokens ); |
| 1341 | if ( !selector ) { |
| 1342 | push.apply( results, seed ); |
| 1343 | return results; |
| 1344 | } |
| 1345 |
no test coverage detected