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/***
MochiKit.Selector 1.4.2
(c) 2005 Bob Ippolito and others. All rights Reserved.
***/
MochiKit.Base._deps('Selector', ['Base', 'DOM', 'Iter']);
MochiKit.Selector.NAME = "MochiKit.Selector";
MochiKit.Selector.VERSION = "1.4.2";
MochiKit.Selector.__repr__ = function () {
return "[" + this.NAME + " " + this.VERSION + "]";
};
MochiKit.Selector.toString = function () {
return this.__repr__();
};
MochiKit.Selector.EXPORT = [
"Selector",
"findChildElements",
"findDocElements",
"$$"
];
MochiKit.Selector.EXPORT_OK = [
];
MochiKit.Selector.Selector = function (expression) {
this.params = {classNames: [], pseudoClassNames: []};
this.expression = expression.toString().replace(/(^\s+|\s+$)/g, '');
this.parseExpression();
this.compileMatcher();
};
MochiKit.Selector.Selector.prototype = {
/***
Selector class: convenient object to make CSS selections.
***/
__class__: MochiKit.Selector.Selector,
/** @id MochiKit.Selector.Selector.prototype.parseExpression */
parseExpression: function () {
function abort(message) {
throw 'Parse error in selector: ' + message;
}
if (this.expression == '') {
abort('empty expression');
}
var repr = MochiKit.Base.repr;
var params = this.params;
var expr = this.expression;
var match, modifier, clause, rest;
while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!^$*]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
params.attributes = params.attributes || [];
params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
expr = match[1];
}
if (expr == '*') {
return this.params.wildcard = true;
}
while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+(?:\([^)]*\))?)(.*)/i)) {
modifier = match[1];
clause = match[2];
rest = match[3];
switch (modifier) {
case '#':
params.id = clause;
break;
case '.':
params.classNames.push(clause);
break;
case ':':
params.pseudoClassNames.push(clause);
break;
case '':
case undefined:
params.tagName = clause.toUpperCase();
break;
default:
abort(repr(expr));
}
expr = rest;
}
if (expr.length > 0) {
abort(repr(expr));
}
},
/** @id MochiKit.Selector.Selector.prototype.buildMatchExpression */
buildMatchExpression: function () {
var repr = MochiKit.Base.repr;
var params = this.params;
var conditions = [];
var clause, i;
function childElements(element) {
return "MochiKit.Base.filter(function (node) { return node.nodeType == 1; }, " + element + ".childNodes)";
}
if (params.wildcard) {
conditions.push('true');
}
if (clause = params.id) {
conditions.push('element.id == ' + repr(clause));
}
if (clause = params.tagName) {
conditions.push('element.tagName.toUpperCase() == ' + repr(clause));
}
if ((clause = params.classNames).length > 0) {
for (i = 0; i < clause.length; i++) {
conditions.push('MochiKit.DOM.hasElementClass(element, ' + repr(clause[i]) + ')');
}
}
if ((clause = params.pseudoClassNames).length > 0) {
for (i = 0; i < clause.length; i++) {
var match = clause[i].match(/^([^(]+)(?:\((.*)\))?$/);
var pseudoClass = match[1];
var pseudoClassArgument = match[2];
switch (pseudoClass) {
case 'root':
conditions.push('element.nodeType == 9 || element === element.ownerDocument.documentElement'); break;
case 'nth-child':
case 'nth-last-child':
case 'nth-of-type':
case 'nth-last-of-type':
match = pseudoClassArgument.match(/^((?:(\d+)n\+)?(\d+)|odd|even)$/);
if (!match) {
throw "Invalid argument to pseudo element nth-child: " + pseudoClassArgument;
}
var a, b;
if (match[0] == 'odd') {
a = 2;
b = 1;
} else if (match[0] == 'even') {
a = 2;
b = 0;
} else {
a = match[2] && parseInt(match) || null;
b = parseInt(match[3]);
}
conditions.push('this.nthChild(element,' + a + ',' + b
+ ',' + !!pseudoClass.match('^nth-last') // Reverse
+ ',' + !!pseudoClass.match('of-type$') // Restrict to same tagName
+ ')');
break;
case 'first-child':
conditions.push('this.nthChild(element, null, 1)');
break;
case 'last-child':
conditions.push('this.nthChild(element, null, 1, true)');
break;
case 'first-of-type':
conditions.push('this.nthChild(element, null, 1, false, true)');
break;
case 'last-of-type':
conditions.push('this.nthChild(element, null, 1, true, true)');
break;
case 'only-child':
conditions.push(childElements('element.parentNode') + '.length == 1');
break;
case 'only-of-type':
conditions.push('MochiKit.Base.filter(function (node) { return node.tagName == element.tagName; }, ' + childElements('element.parentNode') + ').length == 1');
break;
case 'empty':
conditions.push('element.childNodes.length == 0');
break;
case 'enabled':
conditions.push('(this.isUIElement(element) && element.disabled === false)');
break;
case 'disabled':
conditions.push('(this.isUIElement(element) && element.disabled === true)');
break;
case 'checked':
conditions.push('(this.isUIElement(element) && element.checked === true)');
break;
case 'not':
var subselector = new MochiKit.Selector.Selector(pseudoClassArgument);
conditions.push('!( ' + subselector.buildMatchExpression() + ')')
break;
}
}
}
if (clause = params.attributes) {
MochiKit.Base.map(function (attribute) {
var value = 'MochiKit.DOM.getNodeAttribute(element, ' + repr(attribute.name) + ')';
var splitValueBy = function (delimiter) {
return value + '.split(' + repr(delimiter) + ')';
}
conditions.push(value + ' != null');
switch (attribute.operator) {
case '=':
conditions.push(value + ' == ' + repr(attribute.value));
break;
case '~=':
conditions.push('MochiKit.Base.findValue(' + splitValueBy(' ') + ', ' + repr(attribute.value) + ') > -1');
break;
case '^=':
conditions.push(value + '.substring(0, ' + attribute.value.length + ') == ' + repr(attribute.value));
break;
case '$=':
conditions.push(value + '.substring(' + value + '.length - ' + attribute.value.length + ') == ' + repr(attribute.value));
break;
case '*=':
conditions.push(value + '.match(' + repr(attribute.value) + ')');
break;
case '|=':
conditions.push(splitValueBy('-') + '[0].toUpperCase() == ' + repr(attribute.value.toUpperCase()));
break;
case '!=':
conditions.push(value + ' != ' + repr(attribute.value));
break;
case '':
case undefined:
// Condition already added above
break;
default:
throw 'Unknown operator ' + attribute.operator + ' in selector';
}
}, clause);
}
return conditions.join(' && ');
},
/** @id MochiKit.Selector.Selector.prototype.compileMatcher */
compileMatcher: function () {
var code = 'return (!element.tagName) ? false : ' +
this.buildMatchExpression() + ';';
this.match = new Function('element', code);
},
/** @id MochiKit.Selector.Selector.prototype.nthChild */
nthChild: function (element, a, b, reverse, sametag){
var siblings = MochiKit.Base.filter(function (node) {
return node.nodeType == 1;
}, element.parentNode.childNodes);
if (sametag) {
siblings = MochiKit.Base.filter(function (node) {
return node.tagName == element.tagName;
}, siblings);
}
if (reverse) {
siblings = MochiKit.Iter.reversed(siblings);
}
if (a) {
var actualIndex = MochiKit.Base.findIdentical(siblings, element);
return ((actualIndex + 1 - b) / a) % 1 == 0;
} else {
return b == MochiKit.Base.findIdentical(siblings, element) + 1;
}
},
/** @id MochiKit.Selector.Selector.prototype.isUIElement */
isUIElement: function (element) {
return MochiKit.Base.findValue(['input', 'button', 'select', 'option', 'textarea', 'object'],
element.tagName.toLowerCase()) > -1;
},
/** @id MochiKit.Selector.Selector.prototype.findElements */
findElements: function (scope, axis) {
var element;
if (axis == undefined) {
axis = "";
}
function inScope(element, scope) {
if (axis == "") {
return MochiKit.DOM.isChildNode(element, scope);
} else if (axis == ">") {
return element.parentNode === scope;
} else if (axis == "+") {
return element === nextSiblingElement(scope);
} else if (axis == "~") {
var sibling = scope;
while (sibling = nextSiblingElement(sibling)) {
if (element === sibling) {
return true;
}
}
return false;
} else {
throw "Invalid axis: " + axis;
}
}
if (element = MochiKit.DOM.getElement(this.params.id)) {
if (this.match(element)) {
if (!scope || inScope(element, scope)) {
return [element];
}
}
}
function nextSiblingElement(node) {
node = node.nextSibling;
while (node && node.nodeType != 1) {
node = node.nextSibling;
}
return node;
}
if (axis == "") {
scope = (scope || MochiKit.DOM.currentDocument()).getElementsByTagName(this.params.tagName || '*');
} else if (axis == ">") {
if (!scope) {
throw "> combinator not allowed without preceding expression";
}
scope = MochiKit.Base.filter(function (node) {
return node.nodeType == 1;
}, scope.childNodes);
} else if (axis == "+") {
if (!scope) {
throw "+ combinator not allowed without preceding expression";
}
scope = nextSiblingElement(scope) && [nextSiblingElement(scope)];
} else if (axis == "~") {
if (!scope) {
throw "~ combinator not allowed without preceding expression";
}
var newscope = [];
while (nextSiblingElement(scope)) {
scope = nextSiblingElement(scope);
newscope.push(scope);
}
scope = newscope;
}
if (!scope) {
return [];
}
var results = MochiKit.Base.filter(MochiKit.Base.bind(function (scopeElt) {
return this.match(scopeElt);
}, this), scope);
return results;
},
/** @id MochiKit.Selector.Selector.prototype.repr */
repr: function () {
return 'Selector(' + this.expression + ')';
},
toString: MochiKit.Base.forwardCall("repr")
};
MochiKit.Base.update(MochiKit.Selector, {
/** @id MochiKit.Selector.findChildElements */
findChildElements: function (element, expressions) {
var uniq = function(arr) {
var res = [];
for (var i = 0; i < arr.length; i++) {
if (MochiKit.Base.findIdentical(res, arr[i]) < 0) {
res.push(arr[i]);
}
}
return res;
};
return MochiKit.Base.flattenArray(MochiKit.Base.map(function (expression) {
var nextScope = "";
var reducer = function (results, expr) {
if (match = expr.match(/^[>+~]$/)) {
nextScope = match[0];
return results;
} else {
var selector = new MochiKit.Selector.Selector(expr);
var elements = MochiKit.Iter.reduce(function (elements, result) {
return MochiKit.Base.extend(elements, selector.findElements(result || element, nextScope));
}, results, []);
nextScope = "";
return elements;
}
};
var exprs = expression.replace(/(^\s+|\s+$)/g, '').split(/\s+/);
return uniq(MochiKit.Iter.reduce(reducer, exprs, [null]));
}, expressions));
},
findDocElements: function () {
return MochiKit.Selector.findChildElements(MochiKit.DOM.currentDocument(), arguments);
},
__new__: function () {
var m = MochiKit.Base;
this.$$ = this.findDocElements;
this.EXPORT_TAGS = {
":common": this.EXPORT,
":all": m.concat(this.EXPORT, this.EXPORT_OK)
};
m.nameFunctions(this);
}
});
MochiKit.Selector.__new__();
MochiKit.Base._exportSymbols(this, MochiKit.Selector);