Reorganzing the jQuery source (first phase).
This commit is contained in:
John Resig
parent
13b66c8ba9
commit
b4e23b5af0
29 changed files with 16 additions and 16 deletions
432
src/selector.js
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432
src/selector.js
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var chars = jQuery.browser.safari && parseInt(jQuery.browser.version) < 417 ?
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"(?:[\\w*_-]|\\\\.)" :
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"(?:[\\w\u0128-\uFFFF*_-]|\\\\.)",
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quickChild = new RegExp("^>\\s*(" + chars + "+)"),
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quickID = new RegExp("^(" + chars + "+)(#)(" + chars + "+)"),
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quickClass = new RegExp("^([#.]?)(" + chars + "*)");
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jQuery.extend({
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expr: {
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"": "m[2]=='*'||jQuery.nodeName(a,m[2])",
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"#": "a.getAttribute('id')==m[2]",
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":": {
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// Position Checks
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lt: "i<m[3]-0",
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gt: "i>m[3]-0",
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nth: "m[3]-0==i",
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eq: "m[3]-0==i",
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first: "i==0",
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last: "i==r.length-1",
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even: "i%2==0",
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odd: "i%2",
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// Child Checks
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"first-child": "a.parentNode.getElementsByTagName('*')[0]==a",
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"last-child": "jQuery.nth(a.parentNode.lastChild,1,'previousSibling')==a",
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"only-child": "!jQuery.nth(a.parentNode.lastChild,2,'previousSibling')",
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// Parent Checks
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parent: "a.firstChild",
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empty: "!a.firstChild",
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// Text Check
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contains: "(a.textContent||a.innerText||'').indexOf(m[3])>=0",
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// Visibility
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visible: '"hidden"!=a.type&&jQuery.css(a,"display")!="none"&&jQuery.css(a,"visibility")!="hidden"',
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hidden: '"hidden"==a.type||jQuery.css(a,"display")=="none"||jQuery.css(a,"visibility")=="hidden"',
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// Form attributes
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enabled: "!a.disabled",
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disabled: "a.disabled",
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checked: "a.checked",
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selected: "a.selected||jQuery.attr(a,'selected')",
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// Form elements
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text: "'text'==a.type",
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radio: "'radio'==a.type",
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checkbox: "'checkbox'==a.type",
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file: "'file'==a.type",
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password: "'password'==a.type",
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submit: "'submit'==a.type",
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image: "'image'==a.type",
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reset: "'reset'==a.type",
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button: '"button"==a.type||jQuery.nodeName(a,"button")',
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input: "/input|select|textarea|button/i.test(a.nodeName)",
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// :has()
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has: "jQuery.find(m[3],a).length",
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// :header
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header: "/h\\d/i.test(a.nodeName)",
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// :animated
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animated: "jQuery.grep(jQuery.timers,function(fn){return a==fn.elem;}).length"
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}
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},
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// The regular expressions that power the parsing engine
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parse: [
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// Match: [@value='test'], [@foo]
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/^(\[) *@?([\w-]+) *([!*$^~=]*) *('?"?)(.*?)\4 *\]/,
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// Match: :contains('foo')
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/^(:)([\w-]+)\("?'?(.*?(\(.*?\))?[^(]*?)"?'?\)/,
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// Match: :even, :last-chlid, #id, .class
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new RegExp("^([:.#]*)(" + chars + "+)")
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],
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multiFilter: function( expr, elems, not ) {
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var old, cur = [];
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while ( expr && expr != old ) {
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old = expr;
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var f = jQuery.filter( expr, elems, not );
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expr = f.t.replace(/^\s*,\s*/, "" );
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cur = not ? elems = f.r : jQuery.merge( cur, f.r );
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}
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return cur;
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},
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find: function( t, context ) {
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// Quickly handle non-string expressions
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if ( typeof t != "string" )
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return [ t ];
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// Make sure that the context is a DOM Element
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if ( context && !context.nodeType )
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context = null;
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// Set the correct context (if none is provided)
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context = context || document;
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// Initialize the search
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var ret = [context], done = [], last;
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// Continue while a selector expression exists, and while
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// we're no longer looping upon ourselves
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while ( t && last != t ) {
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var r = [];
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last = t;
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t = jQuery.trim(t);
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var foundToken = false;
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// An attempt at speeding up child selectors that
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// point to a specific element tag
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var re = quickChild;
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var m = re.exec(t);
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if ( m ) {
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var nodeName = m[1].toUpperCase();
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// Perform our own iteration and filter
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for ( var i = 0; ret[i]; i++ )
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for ( var c = ret[i].firstChild; c; c = c.nextSibling )
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if ( c.nodeType == 1 && (nodeName == "*" || c.nodeName.toUpperCase() == nodeName.toUpperCase()) )
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r.push( c );
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ret = r;
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t = t.replace( re, "" );
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if ( t.indexOf(" ") == 0 ) continue;
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foundToken = true;
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} else {
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re = /^([>+~])\s*(\w*)/i;
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if ( (m = re.exec(t)) != null ) {
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r = [];
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var nodeName = m[2], mergeNum = jQuery.mergeNum++;
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m = m[1];
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for ( var j = 0, rl = ret.length; j < rl; j++ ) {
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var n = m == "~" || m == "+" ? ret[j].nextSibling : ret[j].firstChild;
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for ( ; n; n = n.nextSibling )
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if ( n.nodeType == 1 ) {
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if ( m == "~" && n.mergeNum == mergeNum ) break;
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if (!nodeName || n.nodeName.toUpperCase() == nodeName.toUpperCase() ) {
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if ( m == "~" ) n.mergeNum = mergeNum;
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r.push( n );
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}
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if ( m == "+" ) break;
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}
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}
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ret = r;
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// And remove the token
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t = jQuery.trim( t.replace( re, "" ) );
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foundToken = true;
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}
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}
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// See if there's still an expression, and that we haven't already
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// matched a token
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if ( t && !foundToken ) {
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// Handle multiple expressions
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if ( !t.indexOf(",") ) {
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// Clean the result set
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if ( context == ret[0] ) ret.shift();
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// Merge the result sets
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done = jQuery.merge( done, ret );
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// Reset the context
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r = ret = [context];
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// Touch up the selector string
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t = " " + t.substr(1,t.length);
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} else {
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// Optimize for the case nodeName#idName
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var re2 = quickID;
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var m = re2.exec(t);
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// Re-organize the results, so that they're consistent
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if ( m ) {
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m = [ 0, m[2], m[3], m[1] ];
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} else {
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// Otherwise, do a traditional filter check for
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// ID, class, and element selectors
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re2 = quickClass;
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m = re2.exec(t);
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}
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m[2] = m[2].replace(/\\/g, "");
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var elem = ret[ret.length-1];
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// Try to do a global search by ID, where we can
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if ( m[1] == "#" && elem && elem.getElementById && !jQuery.isXMLDoc(elem) ) {
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// Optimization for HTML document case
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var oid = elem.getElementById(m[2]);
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// Do a quick check for the existence of the actual ID attribute
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// to avoid selecting by the name attribute in IE
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// also check to insure id is a string to avoid selecting an element with the name of 'id' inside a form
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if ( (jQuery.browser.msie||jQuery.browser.opera) && oid && typeof oid.id == "string" && oid.id != m[2] )
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oid = jQuery('[@id="'+m[2]+'"]', elem)[0];
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// Do a quick check for node name (where applicable) so
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// that div#foo searches will be really fast
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ret = r = oid && (!m[3] || jQuery.nodeName(oid, m[3])) ? [oid] : [];
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} else {
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// We need to find all descendant elements
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for ( var i = 0; ret[i]; i++ ) {
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// Grab the tag name being searched for
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var tag = m[1] == "#" && m[3] ? m[3] : m[1] != "" || m[0] == "" ? "*" : m[2];
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// Handle IE7 being really dumb about <object>s
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if ( tag == "*" && ret[i].nodeName.toLowerCase() == "object" )
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tag = "param";
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r = jQuery.merge( r, ret[i].getElementsByTagName( tag ));
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}
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// It's faster to filter by class and be done with it
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if ( m[1] == "." )
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r = jQuery.classFilter( r, m[2] );
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// Same with ID filtering
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if ( m[1] == "#" ) {
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var tmp = [];
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// Try to find the element with the ID
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for ( var i = 0; r[i]; i++ )
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if ( r[i].getAttribute("id") == m[2] ) {
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tmp = [ r[i] ];
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break;
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}
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r = tmp;
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}
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ret = r;
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}
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t = t.replace( re2, "" );
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}
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}
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// If a selector string still exists
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if ( t ) {
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// Attempt to filter it
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var val = jQuery.filter(t,r);
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ret = r = val.r;
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t = jQuery.trim(val.t);
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}
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}
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// An error occurred with the selector;
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// just return an empty set instead
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if ( t )
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ret = [];
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// Remove the root context
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if ( ret && context == ret[0] )
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ret.shift();
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// And combine the results
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done = jQuery.merge( done, ret );
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return done;
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},
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classFilter: function(r,m,not){
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m = " " + m + " ";
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var tmp = [];
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for ( var i = 0; r[i]; i++ ) {
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var pass = (" " + r[i].className + " ").indexOf( m ) >= 0;
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if ( !not && pass || not && !pass )
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tmp.push( r[i] );
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}
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return tmp;
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},
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filter: function(t,r,not) {
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var last;
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// Look for common filter expressions
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while ( t && t != last ) {
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last = t;
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var p = jQuery.parse, m;
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for ( var i = 0; p[i]; i++ ) {
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m = p[i].exec( t );
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if ( m ) {
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// Remove what we just matched
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t = t.substring( m[0].length );
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m[2] = m[2].replace(/\\/g, "");
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break;
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}
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}
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if ( !m )
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break;
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// :not() is a special case that can be optimized by
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// keeping it out of the expression list
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if ( m[1] == ":" && m[2] == "not" )
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r = jQuery.filter(m[3], r, true).r;
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// We can get a big speed boost by filtering by class here
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else if ( m[1] == "." )
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r = jQuery.classFilter(r, m[2], not);
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else if ( m[1] == "[" ) {
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var tmp = [], type = m[3];
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for ( var i = 0, rl = r.length; i < rl; i++ ) {
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var a = r[i], z = a[ jQuery.props[m[2]] || m[2] ];
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if ( z == null || /href|src|selected/.test(m[2]) )
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z = jQuery.attr(a,m[2]) || '';
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if ( (type == "" && !!z ||
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type == "=" && z == m[5] ||
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type == "!=" && z != m[5] ||
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type == "^=" && z && !z.indexOf(m[5]) ||
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type == "$=" && z.substr(z.length - m[5].length) == m[5] ||
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(type == "*=" || type == "~=") && z.indexOf(m[5]) >= 0) ^ not )
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tmp.push( a );
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}
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r = tmp;
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// We can get a speed boost by handling nth-child here
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} else if ( m[1] == ":" && m[2] == "nth-child" ) {
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var num = jQuery.mergeNum++, tmp = [],
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test = /(\d*)n\+?(\d*)/.exec(
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m[3] == "even" && "2n" || m[3] == "odd" && "2n+1" ||
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!/\D/.test(m[3]) && "n+" + m[3] || m[3]),
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first = (test[1] || 1) - 0, last = test[2] - 0;
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for ( var i = 0, rl = r.length; i < rl; i++ ) {
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var node = r[i], parentNode = node.parentNode;
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if ( num != parentNode.mergeNum ) {
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var c = 1;
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for ( var n = parentNode.firstChild; n; n = n.nextSibling )
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if ( n.nodeType == 1 )
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n.nodeIndex = c++;
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parentNode.mergeNum = num;
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}
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var add = false;
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if ( first == 1 ) {
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if ( last == 0 || node.nodeIndex == last )
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add = true;
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} else if ( (node.nodeIndex + last) % first == 0 )
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add = true;
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if ( add ^ not )
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tmp.push( node );
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}
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r = tmp;
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// Otherwise, find the expression to execute
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} else {
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var f = jQuery.expr[m[1]];
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if ( typeof f != "string" )
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f = jQuery.expr[m[1]][m[2]];
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// Build a custom macro to enclose it
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f = eval("false||function(a,i){return " + f + "}");
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// Execute it against the current filter
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r = jQuery.grep( r, f, not );
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}
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}
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// Return an array of filtered elements (r)
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// and the modified expression string (t)
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return { r: r, t: t };
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},
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parents: function( elem ){
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var matched = [];
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var cur = elem.parentNode;
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while ( cur && cur != document ) {
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matched.push( cur );
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cur = cur.parentNode;
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}
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return matched;
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},
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nth: function(cur,result,dir,elem){
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result = result || 1;
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var num = 0;
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for ( ; cur; cur = cur[dir] )
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if ( cur.nodeType == 1 && ++num == result )
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break;
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return cur;
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},
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sibling: function( n, elem ) {
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var r = [];
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for ( ; n; n = n.nextSibling ) {
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if ( n.nodeType == 1 && (!elem || n != elem) )
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r.push( n );
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}
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return r;
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}
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});
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