08-27-周三_17-09-29

node_modules/CSSselect/lib/attributes.js

@@ -0,0 +1,178 @@
+var DomUtils  = require("domutils"),
+    hasAttrib = DomUtils.hasAttrib,
+    getAttributeValue = DomUtils.getAttributeValue,
+    falseFunc = require("./basefunctions.js").falseFunc;
+
+//https://github.com/slevithan/XRegExp/blob/master/src/xregexp.js#L469
+var reChars = /[-[\]{}()*+?.,\\^$|#\s]/g;
+
+/*
+	attribute selectors
+*/
+
+var attributeRules = {
+	__proto__: null,
+	equals: function(next, data){
+		var name  = data.name,
+		    value = data.value;
+
+		if(data.ignoreCase){
+			value = value.toLowerCase();
+
+			return function equalsIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null && attr.toLowerCase() === value && next(elem);
+			};
+		}
+
+		return function equals(elem){
+			return getAttributeValue(elem, name) === value && next(elem);
+		};
+	},
+	hyphen: function(next, data){
+		var name  = data.name,
+		    value = data.value,
+		    len = value.length;
+
+		if(data.ignoreCase){
+			value = value.toLowerCase();
+
+			return function hyphenIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null &&
+						(attr.length === len || attr.charAt(len) === "-") &&
+						attr.substr(0, len).toLowerCase() === value &&
+						next(elem);
+			};
+		}
+
+		return function hyphen(elem){
+			var attr = getAttributeValue(elem, name);
+			return attr != null &&
+					attr.substr(0, len) === value &&
+					(attr.length === len || attr.charAt(len) === "-") &&
+					next(elem);
+		};
+	},
+	element: function(next, data){
+		var name = data.name,
+		    value = data.value;
+
+		if(/\s/.test(value)){
+			return falseFunc;
+		}
+
+		value = value.replace(reChars, "\\$&");
+
+		var pattern = "(?:^|\\s)" + value + "(?:$|\\s)",
+		    flags = data.ignoreCase ? "i" : "",
+		    regex = new RegExp(pattern, flags);
+
+		return function element(elem){
+			var attr = getAttributeValue(elem, name);
+			return attr != null && regex.test(attr) && next(elem);
+		};
+	},
+	exists: function(next, data){
+		var name = data.name;
+		return function exists(elem){
+			return hasAttrib(elem, name) && next(elem);
+		};
+	},
+	start: function(next, data){
+		var name  = data.name,
+		    value = data.value,
+		    len = value.length;
+
+		if(len === 0){
+			return falseFunc;
+		}
+		
+		if(data.ignoreCase){
+			value = value.toLowerCase();
+
+			return function startIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null && attr.substr(0, len).toLowerCase() === value && next(elem);
+			};
+		}
+
+		return function start(elem){
+			var attr = getAttributeValue(elem, name);
+			return attr != null && attr.substr(0, len) === value && next(elem);
+		};
+	},
+	end: function(next, data){
+		var name  = data.name,
+		    value = data.value,
+		    len   = -value.length;
+
+		if(len === 0){
+			return falseFunc;
+		}
+
+		if(data.ignoreCase){
+			value = value.toLowerCase();
+
+			return function endIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null && attr.substr(len).toLowerCase() === value && next(elem);
+			};
+		}
+
+		return function end(elem){
+			var attr = getAttributeValue(elem, name);
+			return attr != null && attr.substr(len) === value && next(elem);
+		};
+	},
+	any: function(next, data){
+		var name  = data.name,
+		    value = data.value;
+
+		if(value === ""){
+			return falseFunc;
+		}
+
+		if(data.ignoreCase){
+			var regex = new RegExp(value.replace(reChars, "\\$&"), "i");
+
+			return function anyIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null && regex.test(attr) && next(elem);
+			};
+		}
+
+		return function any(elem){
+			var attr = getAttributeValue(elem, name);
+			return attr != null && attr.indexOf(value) >= 0 && next(elem);
+		};
+	},
+	not: function(next, data){
+		var name  = data.name,
+		    value = data.value;
+
+		if(value === ""){
+			return function notEmpty(elem){
+				return !!getAttributeValue(elem, name) && next(elem);
+			};
+		} else if(data.ignoreCase){
+			value = value.toLowerCase();
+
+			return function notIC(elem){
+				var attr = getAttributeValue(elem, name);
+				return attr != null && attr.toLowerCase() !== value && next(elem);
+			};
+		}
+
+		return function not(elem){
+			return getAttributeValue(elem, name) !== value && next(elem);
+		};
+	}
+};
+
+module.exports = {
+	compile: function(next, data){
+		return attributeRules[data.action](next, data);
+	},
+	rules: attributeRules
+};