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import { rpseudo } from "./var/rpseudo.js";
import { filterMatchExpr } from "./filterMatchExpr.js";
import { unescapeSelector } from "./unescapeSelector.js";
import { selectorError } from "./selectorError.js";
import { tokenize } from "./tokenize.js";
export var preFilter = {
ATTR: function( match ) {
match[ 1 ] = unescapeSelector( match[ 1 ] );
// Move the given value to match[3] whether quoted or unquoted
match[ 3 ] = unescapeSelector( match[ 3 ] || match[ 4 ] || match[ 5 ] || "" );
if ( match[ 2 ] === "~=" ) {
match[ 3 ] = " " + match[ 3 ] + " ";
}
return match.slice( 0, 4 );
},
CHILD: function( match ) {
/* matches from filterMatchExpr["CHILD"]
1 type (only|nth|...)
2 what (child|of-type)
3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
4 xn-component of xn+y argument ([+-]?\d*n|)
5 sign of xn-component
6 x of xn-component
7 sign of y-component
8 y of y-component
*/
match[ 1 ] = match[ 1 ].toLowerCase();
if ( match[ 1 ].slice( 0, 3 ) === "nth" ) {
// nth-* requires argument
if ( !match[ 3 ] ) {
selectorError( match[ 0 ] );
}
// numeric x and y parameters for jQuery.expr.filter.CHILD
// remember that false/true cast respectively to 0/1
match[ 4 ] = +( match[ 4 ] ?
match[ 5 ] + ( match[ 6 ] || 1 ) :
2 * ( match[ 3 ] === "even" || match[ 3 ] === "odd" )
);
match[ 5 ] = +( ( match[ 7 ] + match[ 8 ] ) || match[ 3 ] === "odd" );
// other types prohibit arguments
} else if ( match[ 3 ] ) {
selectorError( match[ 0 ] );
}
return match;
},
PSEUDO: function( match ) {
var excess,
unquoted = !match[ 6 ] && match[ 2 ];
if ( filterMatchExpr.CHILD.test( match[ 0 ] ) ) {
return null;
}
// Accept quoted arguments as-is
if ( match[ 3 ] ) {
match[ 2 ] = match[ 4 ] || match[ 5 ] || "";
// Strip excess characters from unquoted arguments
} else if ( unquoted && rpseudo.test( unquoted ) &&
// Get excess from tokenize (recursively)
( excess = tokenize( unquoted, true ) ) &&
// advance to the next closing parenthesis
( excess = unquoted.indexOf( ")", unquoted.length - excess ) -
unquoted.length ) ) {
// excess is a negative index
match[ 0 ] = match[ 0 ].slice( 0, excess );
match[ 2 ] = unquoted.slice( 0, excess );
}
// Return only captures needed by the pseudo filter method (type and argument)
return match.slice( 0, 3 );
}
};
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