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update lowpro and selector according to last commit
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Reinier Balt
parent
291a364b0d
commit
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3 changed files with 323 additions and 323 deletions
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@ -1,163 +1,163 @@
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/************************************
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*
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* An add-on to Prototype 1.5 to speed up the $$ function in usual cases.
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*
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* http://www.sylvainzimmer.com/index.php/archives/2006/06/25/speeding-up-prototypes-selector/
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*
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* Authors:
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* - Sylvain ZIMMER <sylvain _at_ jamendo.com>
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*
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* Changelog:
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* v1 (2006/06/25)
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* - Initial release
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*
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* License: AS-IS
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*
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* Trivia: Check out www.jamendo.com for some great Creative Commons music ;-)
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*
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************************************/
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// We don't extend the Selector class because we want
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// to be able to use it if the expression is too complicated.
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var SelectorLiteAddon=Class.create();
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SelectorLiteAddon.prototype = {
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/************************************
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*
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* An add-on to Prototype 1.5 to speed up the $$ function in usual cases.
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*
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* http://www.sylvainzimmer.com/index.php/archives/2006/06/25/speeding-up-prototypes-selector/
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*
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* Authors:
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* - Sylvain ZIMMER <sylvain _at_ jamendo.com>
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*
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* Changelog:
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* v1 (2006/06/25)
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* - Initial release
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*
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* License: AS-IS
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*
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* Trivia: Check out www.jamendo.com for some great Creative Commons music ;-)
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*
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************************************/
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// We don't extend the Selector class because we want
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// to be able to use it if the expression is too complicated.
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var SelectorLiteAddon=Class.create();
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SelectorLiteAddon.prototype = {
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// This is the constructor. It parses the stack of selectors.
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initialize: function(stack) {
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this.r=[]; //results
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this.s=[]; //stack of selectors
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this.i=0; //stack pointer
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//Parse the selectors
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for (var i=stack.length-1;i>=0;i--) {
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//This is the parsed selector. Format is : [tagname, id, classnames]
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var s=["*","",[]];
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//The unparsed current selector
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var t=stack[i];
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//Parse the selector backwards
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var cursor=t.length-1;
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do {
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var d=t.lastIndexOf("#");
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var p=t.lastIndexOf(".");
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cursor=Math.max(d,p);
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//Found a tagName
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if (cursor==-1) {
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s[0]=t.toUpperCase();
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//Found a className
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} else if (d==-1 || p==cursor) {
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s[2].push(t.substring(p+1));
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//Found an ID
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} else if (!s[1]) {
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s[1]=t.substring(d+1);
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}
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t=t.substring(0,cursor);
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} while (cursor>0);
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this.s[i]=s;
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}
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},
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//Returns a list of matched elements below a given root.
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get:function(root) {
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this.explore(root || document,this.i==(this.s.length-1));
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return this.r;
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},
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//Recursive function where the actual search is being done.
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// elt: current root element
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// leaf: boolean, are we in a leaf of the search tree?
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explore:function(elt,leaf) {
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//Parsed selector
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var s=this.s[this.i];
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//Results
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var r=[];
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//Selector has an ID, use it!
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if (s[1]) {
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e=$(s[1]);
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if (e && (s[0]=="*" || e.tagName==s[0]) && e.childOf(elt)) {
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r=[e];
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}
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//Selector has no ID, search by tagname.
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} else {
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r=$A(elt.getElementsByTagName(s[0]));
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}
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//Filter the results by classnames.
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//Todo: by attributes too?
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//Sidenote: The performance hit is often here.
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//Single className : that's fast!
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if (s[2].length==1) { //single classname
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r=r.findAll(function(o) {
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//If the element has only one classname too, the test is simple!
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if (o.className.indexOf(" ")==-1) {
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return o.className==s[2][0];
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} else {
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return o.className.split(/\s+/).include(s[2][0]);
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}
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});
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//Multipe classNames, a bit slower.
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} else if (s[2].length>0) {
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r=r.findAll(function(o) {
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//If the elemtn has only one classname, we can drop it.
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if (o.className.indexOf(" ")==-1) {
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return false;
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} else {
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//Check that all required classnames are present.
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var q=o.className.split(/\s+/);
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return s[2].all(function(c) {
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return q.include(c);
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});
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}
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});
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}
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//Append the results if we're in a leaf
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if (leaf) {
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this.r=this.r.concat(r);
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//Continue exploring the tree otherwise
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} else {
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++this.i;
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r.each(function(o) {
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this.explore(o,this.i==(this.s.length-1));
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}.bind(this));
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}
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}
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initialize: function(stack) {
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this.r=[]; //results
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this.s=[]; //stack of selectors
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this.i=0; //stack pointer
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//Parse the selectors
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for (var i=stack.length-1;i>=0;i--) {
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//This is the parsed selector. Format is : [tagname, id, classnames]
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var s=["*","",[]];
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//The unparsed current selector
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var t=stack[i];
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//Parse the selector backwards
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var cursor=t.length-1;
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do {
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var d=t.lastIndexOf("#");
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var p=t.lastIndexOf(".");
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cursor=Math.max(d,p);
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//Found a tagName
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if (cursor==-1) {
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s[0]=t.toUpperCase();
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//Found a className
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} else if (d==-1 || p==cursor) {
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s[2].push(t.substring(p+1));
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//Found an ID
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} else if (!s[1]) {
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s[1]=t.substring(d+1);
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}
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t=t.substring(0,cursor);
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} while (cursor>0);
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this.s[i]=s;
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}
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},
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//Returns a list of matched elements below a given root.
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get:function(root) {
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this.explore(root || document,this.i==(this.s.length-1));
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return this.r;
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},
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//Recursive function where the actual search is being done.
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// elt: current root element
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// leaf: boolean, are we in a leaf of the search tree?
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explore:function(elt,leaf) {
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//Parsed selector
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var s=this.s[this.i];
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//Results
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var r=[];
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//Selector has an ID, use it!
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if (s[1]) {
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e=$(s[1]);
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if (e && (s[0]=="*" || e.tagName==s[0]) && e.childOf(elt)) {
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r=[e];
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}
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//Selector has no ID, search by tagname.
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} else {
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r=$A(elt.getElementsByTagName(s[0]));
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}
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//Filter the results by classnames.
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//Todo: by attributes too?
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//Sidenote: The performance hit is often here.
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//Single className : that's fast!
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if (s[2].length==1) { //single classname
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r=r.findAll(function(o) {
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//If the element has only one classname too, the test is simple!
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if (o.className.indexOf(" ")==-1) {
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return o.className==s[2][0];
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} else {
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return o.className.split(/\s+/).include(s[2][0]);
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}
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});
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//Multipe classNames, a bit slower.
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} else if (s[2].length>0) {
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r=r.findAll(function(o) {
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//If the elemtn has only one classname, we can drop it.
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if (o.className.indexOf(" ")==-1) {
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return false;
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} else {
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//Check that all required classnames are present.
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var q=o.className.split(/\s+/);
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return s[2].all(function(c) {
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return q.include(c);
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});
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}
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});
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}
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//Append the results if we're in a leaf
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if (leaf) {
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this.r=this.r.concat(r);
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//Continue exploring the tree otherwise
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} else {
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++this.i;
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r.each(function(o) {
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this.explore(o,this.i==(this.s.length-1));
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}.bind(this));
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}
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}
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}
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//Overwrite the $$ function.
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var $$old=$$;
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var $$=function(a,b) {
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//expression is too complicated, forward the call to prototype's function!
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if (b || a.indexOf("[")>=0) return $$old.apply(this,arguments);
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//Otherwise use our addon!
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return new SelectorLiteAddon(a.split(/\s+/)).get();
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}
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//Overwrite the $$ function.
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var $$old=$$;
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var $$=function(a,b) {
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//expression is too complicated, forward the call to prototype's function!
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if (b || a.indexOf("[")>=0) return $$old.apply(this,arguments);
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//Otherwise use our addon!
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return new SelectorLiteAddon(a.split(/\s+/)).get();
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}
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