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Made the parsing engine extensible.

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This commit is contained in:
John Resig 2006-07-16 18:23:09 +00:00
parent f5f6cbc8c0
commit 98bd178cb0
1 changed files with 40 additions and 37 deletions
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77
jquery/jquery.js vendored
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@ -1405,50 +1405,53 @@ jQuery.extend({
} else
return "";
},
// The regular expressions that power the parsing engine
parse: [
// Match: [@value='test'], [@foo]
"\\[ *(@)S *([!*$^=]*) *Q\\]",
// Match: [div], [div p]
"(\\[)Q\\]",
// Match: :contains('foo')
"(:)S\\(Q\\)",
// Match: :even, :last-chlid
"([:.#]*)S"
],
parseSwap: [ 1, 0, 0, 0 ],
filter: function(t,r,not) {
// Figure out if we're doing regular, or inverse, filtering
var g = not !== false ? jQuery.grep :
function(a,f) {return jQuery.grep(a,f,true);};
// Look for a string-like sequence
var str = "([a-zA-Z*_-][a-zA-Z0-9_-]*)";
// Look for something (optionally) enclosed with quotes
var qstr = " *'?\"?([^'\"]*)'?\"? *";
while ( t && /^[a-zA-Z\[*:.#]/.test(t) ) {
// Handles:
// [@foo], [@foo=bar], etc.
var re = new RegExp("^\\[ *@" + str + " *([!*$^=]*) *" + qstr + "\\]");
var m = re.exec(t);
// Re-organize the match
if ( m ) m = ["", "@", m[2], m[1], m[3]];
// Handles:
// [div], [.foo]
if ( !m ) {
re = new RegExp("^(\\[)" + qstr + "\\]");
m = re.exec(t);
while ( t && /^[a-z[({<*:.#]/i.test(t) ) {
for ( var i = 0; i < jQuery.parse.length; i++ ) {
var re = new RegExp( "^" + jQuery.parse[i]
// Look for a string-like sequence
.replace( 'S', "([a-z*_-][a-z0-9_-]*)" )
// Look for something (optionally) enclosed with quotes
.replace( 'Q', " *'?\"?([^'\"]*)'?\"? *" ), "i" );
var m = re.exec( t );
if ( m ) {
// Re-organize the match
if ( jQuery.parseSwap[i] )
m = ["", m[1], m[3], m[2], m[4]];
// Remove what we just matched
t = t.replace( re, "" );
break;
}
}
// Handles:
// :contains(test), :not(.foo)
if ( !m ) {
re = new RegExp("^(:)" + str + "\\(" + qstr + "\\)");
m = re.exec(t);
}
// Handles:
// :foo, .foo, #foo, foo
if ( !m ) {
re = new RegExp("^([:.#]*)" + str);
m = re.exec(t);
}
// Remove what we just matched
t = t.replace( re, "" );
// :not() is a special case that can be optomized by
// keeping it out of the expression list