first commit

build/node_modules/css-tree/lib/lexer/grammar/translate.js

@@ -0,0 +1,106 @@
+'use strict';
+
+function isNodeType(node, type) {
+    return node && node.type === type;
+}
+
+function serializeMultiplier(multiplier) {
+    if (multiplier.min === 0 && multiplier.max === 0) {
+        return '*';
+    }
+
+    if (multiplier.min === 0 && multiplier.max === 1) {
+        return '?';
+    }
+
+    if (multiplier.min === 1 && multiplier.max === 0) {
+        return multiplier.comma ? '#' : '+';
+    }
+
+    if (multiplier.min === 1 && multiplier.max === 1) {
+        return '';
+    }
+
+    return (
+        (multiplier.comma ? '#' : '') +
+        '{' + multiplier.min + (multiplier.min !== multiplier.max ? ',' + (multiplier.max !== 0 ? multiplier.max : '') : '') + '}'
+    );
+}
+
+function translateSequence(node, forceBraces, decorate) {
+    var result = '';
+
+    if (node.explicit || forceBraces) {
+        result += '[' + (!isNodeType(node.terms[0], 'Comma') ? ' ' : '');
+    }
+
+    result += node.terms.map(function(term) {
+        return translate(term, forceBraces, decorate);
+    }).join(node.combinator === ' ' ? ' ' : ' ' + node.combinator + ' ');
+
+    if (node.explicit || forceBraces) {
+        result += ' ]';
+    }
+
+    return result;
+}
+
+function translateParentheses(group, forceBraces, decorate) {
+    if (!group.terms.length) {
+        return '()';
+    }
+
+    return '( ' + translateSequence(group, forceBraces, decorate) + ' )';
+}
+
+function translate(node, forceBraces, decorate) {
+    var result;
+
+    switch (node.type) {
+        case 'Group':
+            result =
+                translateSequence(node, forceBraces, decorate) +
+                (node.disallowEmpty ? '!' : '') +
+                serializeMultiplier(node.multiplier);
+            break;
+
+        case 'Keyword':
+            result = node.name;
+            break;
+
+        case 'Function':
+            result = node.name + translateParentheses(node.children, forceBraces, decorate);
+            break;
+
+        case 'Parentheses': // replace for seq('(' seq(...node.children) ')')
+            result = translateParentheses(node.children, forceBraces, decorate);
+            break;
+
+        case 'Type':
+            result = '<' + node.name + '>';
+            break;
+
+        case 'Property':
+            result = '<\'' + node.name + '\'>';
+            break;
+
+        case 'Combinator': // remove?
+        case 'Slash':      // replace for String? '/'
+        case 'Percent':    // replace for String? '%'
+        case 'String':
+        case 'Comma':
+            result = node.value;
+            break;
+
+        default:
+            throw new Error('Unknown node type `' + node.type + '`');
+    }
+
+    if (typeof decorate === 'function') {
+        result = decorate(result, node);
+    }
+
+    return result;
+}
+
+module.exports = translate;