08-27-周三_17-09-29

node_modules/CSSwhat/index.js

@@ -0,0 +1,182 @@
+"use strict";
+
+module.exports = parse;
+
+var re_ws = /^\s/,
+    re_name = /^(?:\\.|[\w\-\u00c0-\uFFFF])+/,
+    re_escape = /\\([\da-f]{1,6}\s?|(\s)|.)/ig,
+    //modified version of https://github.com/jquery/sizzle/blob/master/src/sizzle.js#L87
+    re_attr = /^\s*((?:\\.|[\w\u00c0-\uFFFF\-])+)\s*(?:(\S?)=\s*(?:(['"])(.*?)\3|(#?(?:\\.|[\w\u00c0-\uFFFF\-])*)|)|)\s*(i)?\]/;
+
+var actionTypes = {
+	__proto__: null,
+	"undefined": "exists",
+	"":  "equals",
+	"~": "element",
+	"^": "start",
+	"$": "end",
+	"*": "any",
+	"!": "not",
+	"|": "hyphen"
+};
+
+var simpleSelectors = {
+	__proto__: null,
+	">": "child",
+	"<": "parent",
+	"~": "sibling",
+	"+": "adjacent"
+};
+
+var attribSelectors = {
+	__proto__: null,
+	"#": ["id", "equals"],
+	".": ["class", "element"]
+};
+
+//unescape function taken from https://github.com/jquery/sizzle/blob/master/src/sizzle.js#L139
+function funescape( _, escaped, escapedWhitespace ) {
+	var high = "0x" + escaped - 0x10000;
+	// NaN means non-codepoint
+	// Support: Firefox
+	// Workaround erroneous numeric interpretation of +"0x"
+	return high !== high || escapedWhitespace ?
+		escaped :
+		// BMP codepoint
+		high < 0 ?
+			String.fromCharCode( high + 0x10000 ) :
+			// Supplemental Plane codepoint (surrogate pair)
+			String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
+}
+
+function unescapeCSS(str){
+	return str.replace(re_escape, funescape);
+}
+
+function getClosingPos(selector){
+	var pos = 1, counter = 1, len = selector.length;
+
+	for(; counter > 0 && pos < len; pos++){
+		if(selector.charAt(pos) === "(") counter++;
+		else if(selector.charAt(pos) === ")") counter--;
+	}
+
+	return pos;
+}
+
+function parse(selector, options){
+	selector = (selector + "").trimLeft();
+
+	var subselects = [],
+	    tokens = [],
+	    sawWS = false,
+	    data, firstChar, name;
+	
+	function getName(){
+		var sub = selector.match(re_name)[0];
+		selector = selector.substr(sub.length);
+		return unescapeCSS(sub);
+	}
+
+	while(selector !== ""){
+		if(re_name.test(selector)){
+			if(sawWS){
+				tokens.push({type: "descendant"});
+				sawWS = false;
+			}
+
+			name = getName();
+
+			if(!options || ("lowerCaseTags" in options ? options.lowerCaseTags : !options.xmlMode)){
+				name = name.toLowerCase();
+			}
+
+			tokens.push({type: "tag", name: name});
+		} else if(re_ws.test(selector)){
+			sawWS = true;
+			selector = selector.trimLeft();
+		} else {
+			firstChar = selector.charAt(0);
+			selector = selector.substr(1);
+
+			if(firstChar in simpleSelectors){
+				tokens.push({type: simpleSelectors[firstChar]});
+				selector = selector.trimLeft();
+				sawWS = false;
+				continue;
+			} else if(firstChar === ","){
+				if(tokens.length === 0){
+					throw new SyntaxError("empty sub-selector");
+				}
+				subselects.push(tokens);
+				tokens = [];
+
+				selector = selector.trimLeft();
+				sawWS = false;
+				continue;
+			} else if(sawWS){
+				tokens.push({type: "descendant"});
+				sawWS = false;
+			}
+
+			if(firstChar === "*"){
+				tokens.push({type: "universal"});
+			} else if(firstChar in attribSelectors){
+				tokens.push({
+					type: "attribute",
+					name: attribSelectors[firstChar][0],
+					action: attribSelectors[firstChar][1],
+					value: getName(),
+					ignoreCase: false
+				});
+			} else if(firstChar === "["){
+				data = selector.match(re_attr);
+				if(!data){
+					throw new SyntaxError("Malformed attribute selector: " + selector);
+				}
+				selector = selector.substr(data[0].length);
+				name = unescapeCSS(data[1]);
+
+				if(
+					!options || (
+						"lowerCaseAttributeNames" in options ?
+							options.lowerCaseAttributeNames :
+							!options.xmlMode
+					)
+				){
+					name = name.toLowerCase();
+				}
+
+				tokens.push({
+					type: "attribute",
+					name: name,
+					action: actionTypes[data[2]],
+					value: unescapeCSS(data[4] || data[5] || ""),
+					ignoreCase: !!data[6]
+				});
+				
+			} else if(firstChar === ":"){
+				//if(selector.charAt(0) === ":"){} //TODO pseudo-element
+				name = getName().toLowerCase();
+				data = null;
+				
+				if(selector.charAt(0) === "("){
+					var pos = getClosingPos(selector);
+					data = selector.substr(1, pos - 2);
+					selector = selector.substr(pos);
+				}
+				
+				tokens.push({type: "pseudo", name: name, data: data});
+			} else {
+				//otherwise, the parser needs to throw or it would enter an infinite loop
+				throw new SyntaxError("Unmatched selector: " + firstChar + selector);
+			}
+		}
+	}
+	
+	if(subselects.length > 0 && tokens.length === 0){
+		throw new SyntaxError("empty sub-selector");
+	}
+	subselects.push(tokens);
+	return subselects;
+}