08-27-周三_17-09-29

node_modules/css-select/lib/general.js

@@ -0,0 +1,89 @@
+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;
+	}
+};