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var DomUtils = require("domutils"),
isTag = DomUtils.isTag,
getParent = DomUtils.getParent,
getChildren = DomUtils.getChildren,
getSiblings = DomUtils.getSiblings,
getName = DomUtils.getName;
/*
all available rules
*/
module.exports = {
__proto__: null,
attribute: require("./attributes.js").compile,
pseudo: require("./pseudos.js").compile,
//tags
tag: function(next, data){
var name = data.name;
return function tag(elem){
return getName(elem) === name && next(elem);
};
},
//traversal
descendant: function(next, rule, options, context, acceptSelf){
return function descendant(elem){
if (acceptSelf && next(elem)) return true;
var found = false;
while(!found && (elem = getParent(elem))){
found = next(elem);
}
return found;
};
},
parent: function(next, data, options){
if(options && options.strict) throw SyntaxError("Parent selector isn't part of CSS3");
return function parent(elem){
return getChildren(elem).some(test);
};
function test(elem){
return isTag(elem) && next(elem);
}
},
child: function(next){
return function child(elem){
var parent = getParent(elem);
return !!parent && next(parent);
};
},
sibling: function(next){
return function sibling(elem){
var siblings = getSiblings(elem);
for(var i = 0; i < siblings.length; i++){
if(isTag(siblings[i])){
if(siblings[i] === elem) break;
if(next(siblings[i])) return true;
}
}
return false;
};
},
adjacent: function(next){
return function adjacent(elem){
var siblings = getSiblings(elem),
lastElement;
for(var i = 0; i < siblings.length; i++){
if(isTag(siblings[i])){
if(siblings[i] === elem) break;
lastElement = siblings[i];
}
}
return !!lastElement && next(lastElement);
};
},
universal: function(next){
return next;
}
};
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