chushihua

node_modules/csso/lib/utils/names.js

@@ -0,0 +1,73 @@
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+var knownKeywords = Object.create(null);
+var knownProperties = Object.create(null);
+
+function getVendorPrefix(string) {
+    if (string[0] === '-') {
+        // skip 2 chars to avoid wrong match with variables names
+        var secondDashIndex = string.indexOf('-', 2);
+
+        if (secondDashIndex !== -1) {
+            return string.substr(0, secondDashIndex + 1);
+        }
+    }
+
+    return '';
+}
+
+function getKeywordInfo(keyword) {
+    if (hasOwnProperty.call(knownKeywords, keyword)) {
+        return knownKeywords[keyword];
+    }
+
+    var lowerCaseKeyword = keyword.toLowerCase();
+    var vendor = getVendorPrefix(lowerCaseKeyword);
+    var name = lowerCaseKeyword;
+
+    if (vendor) {
+        name = name.substr(vendor.length);
+    }
+
+    return knownKeywords[keyword] = Object.freeze({
+        vendor: vendor,
+        prefix: vendor,
+        name: name
+    });
+}
+
+function getPropertyInfo(property) {
+    if (hasOwnProperty.call(knownProperties, property)) {
+        return knownProperties[property];
+    }
+
+    var lowerCaseProperty = property.toLowerCase();
+    var hack = lowerCaseProperty[0];
+
+    if (hack === '*' || hack === '_' || hack === '$') {
+        lowerCaseProperty = lowerCaseProperty.substr(1);
+    } else if (hack === '/' && property[1] === '/') {
+        hack = '//';
+        lowerCaseProperty = lowerCaseProperty.substr(2);
+    } else {
+        hack = '';
+    }
+
+    var vendor = getVendorPrefix(lowerCaseProperty);
+    var name = lowerCaseProperty;
+
+    if (vendor) {
+        name = name.substr(vendor.length);
+    }
+
+    return knownProperties[property] = Object.freeze({
+        hack: hack,
+        vendor: vendor,
+        prefix: hack + vendor,
+        name: name
+    });
+}
+
+module.exports = {
+    keyword: getKeywordInfo,
+    property: getPropertyInfo
+};