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node_modules/css-tree/lib/syntax/scope/default.js

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+import {
+    Ident,
+    String as StringToken,
+    Number as NumberToken,
+    Function as FunctionToken,
+    Url,
+    Hash,
+    Dimension,
+    Percentage,
+    LeftParenthesis,
+    LeftSquareBracket,
+    Comma,
+    Delim
+} from '../../tokenizer/index.js';
+
+const NUMBERSIGN = 0x0023;  // U+0023 NUMBER SIGN (#)
+const ASTERISK = 0x002A;    // U+002A ASTERISK (*)
+const PLUSSIGN = 0x002B;    // U+002B PLUS SIGN (+)
+const HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
+const SOLIDUS = 0x002F;     // U+002F SOLIDUS (/)
+const U = 0x0075;           // U+0075 LATIN SMALL LETTER U (u)
+
+export default function defaultRecognizer(context) {
+    switch (this.tokenType) {
+        case Hash:
+            return this.Hash();
+
+        case Comma:
+            return this.Operator();
+
+        case LeftParenthesis:
+            return this.Parentheses(this.readSequence, context.recognizer);
+
+        case LeftSquareBracket:
+            return this.Brackets(this.readSequence, context.recognizer);
+
+        case StringToken:
+            return this.String();
+
+        case Dimension:
+            return this.Dimension();
+
+        case Percentage:
+            return this.Percentage();
+
+        case NumberToken:
+            return this.Number();
+
+        case FunctionToken:
+            return this.cmpStr(this.tokenStart, this.tokenEnd, 'url(')
+                ? this.Url()
+                : this.Function(this.readSequence, context.recognizer);
+
+        case Url:
+            return this.Url();
+
+        case Ident:
+            // check for unicode range, it should start with u+ or U+
+            if (this.cmpChar(this.tokenStart, U) &&
+                this.cmpChar(this.tokenStart + 1, PLUSSIGN)) {
+                return this.UnicodeRange();
+            } else {
+                return this.Identifier();
+            }
+
+        case Delim: {
+            const code = this.charCodeAt(this.tokenStart);
+
+            if (code === SOLIDUS ||
+                code === ASTERISK ||
+                code === PLUSSIGN ||
+                code === HYPHENMINUS) {
+                return this.Operator(); // TODO: replace with Delim
+            }
+
+            // TODO: produce a node with Delim node type
+
+            if (code === NUMBERSIGN) {
+                this.error('Hex or identifier is expected', this.tokenStart + 1);
+            }
+
+            break;
+        }
+    }
+};