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backend/node_modules/csso/lib/syntax.js

@@ -0,0 +1,60 @@
+import { fork, string, url, tokenTypes as TYPE } from 'css-tree';
+import compress from './compress.js';
+import specificity from './restructure/prepare/specificity.js';
+
+function encodeString(value) {
+    const stringApostrophe = string.encode(value, true);
+    const stringQuote = string.encode(value);
+
+    return stringApostrophe.length < stringQuote.length
+        ? stringApostrophe
+        : stringQuote;
+}
+
+const {
+    lexer,
+    tokenize,
+    parse,
+    generate,
+    walk,
+    find,
+    findLast,
+    findAll,
+    fromPlainObject,
+    toPlainObject
+} = fork({
+    node: {
+        String: {
+            generate(node) {
+                this.token(TYPE.String, encodeString(node.value));
+            }
+        },
+        Url: {
+            generate(node) {
+                const encodedUrl = url.encode(node.value);
+                const string = encodeString(node.value);
+
+                this.token(TYPE.Url,
+                    encodedUrl.length <= string.length + 5 /* "url()".length */
+                        ? encodedUrl
+                        : 'url(' + string + ')'
+                );
+            }
+        }
+    }
+});
+
+export {
+    lexer,
+    tokenize,
+    parse,
+    generate,
+    walk,
+    find,
+    findLast,
+    findAll,
+    fromPlainObject,
+    toPlainObject,
+    specificity,
+    compress
+};