1 files changed, 104 insertions, 0 deletions
diff --git a/vanilla/node_modules/css-tree/lib/syntax/atrule/import.js b/vanilla/node_modules/css-tree/lib/syntax/atrule/import.js
new file mode 100644
index 0000000..4e5a637
--- /dev/null
+++ b/vanilla/node_modules/css-tree/lib/syntax/atrule/import.js
@@ -0,0 +1,104 @@
+import {
+    String as StringToken,
+    Ident,
+    Url,
+    Function as FunctionToken,
+    LeftParenthesis,
+    RightParenthesis
+} from '../../tokenizer/index.js';
+
+function parseWithFallback(parse, fallback) {
+    return this.parseWithFallback(
+        () => {
+            try {
+                return parse.call(this);
+            } finally {
+                this.skipSC();
+                if (this.lookupNonWSType(0) !== RightParenthesis) {
+                    this.error();
+                }
+            }
+        },
+        fallback || (() => this.Raw(null, true))
+    );
+}
+
+const parseFunctions = {
+    layer() {
+        this.skipSC();
+
+        const children = this.createList();
+        const node = parseWithFallback.call(this, this.Layer);
+
+        if (node.type !== 'Raw' || node.value !== '') {
+            children.push(node);
+        }
+
+        return children;
+    },
+    supports() {
+        this.skipSC();
+
+        const children = this.createList();
+        const node = parseWithFallback.call(
+            this,
+            this.Declaration,
+            () => parseWithFallback.call(this, () => this.Condition('supports'))
+        );
+
+        if (node.type !== 'Raw' || node.value !== '') {
+            children.push(node);
+        }
+
+        return children;
+    }
+};
+
+export default {
+    parse: {
+        prelude() {
+            const children = this.createList();
+
+            switch (this.tokenType) {
+                case StringToken:
+                    children.push(this.String());
+                    break;
+
+                case Url:
+                case FunctionToken:
+                    children.push(this.Url());
+                    break;
+
+                default:
+                    this.error('String or url() is expected');
+            }
+
+            this.skipSC();
+
+            if (this.tokenType === Ident &&
+                this.cmpStr(this.tokenStart, this.tokenEnd, 'layer')) {
+                children.push(this.Identifier());
+            } else if (
+                this.tokenType === FunctionToken &&
+                this.cmpStr(this.tokenStart, this.tokenEnd, 'layer(')
+            ) {
+                children.push(this.Function(null, parseFunctions));
+            }
+
+            this.skipSC();
+
+            if (this.tokenType === FunctionToken &&
+                this.cmpStr(this.tokenStart, this.tokenEnd, 'supports(')) {
+                children.push(this.Function(null, parseFunctions));
+            }
+
+            if (this.lookupNonWSType(0) === Ident ||
+                this.lookupNonWSType(0) === LeftParenthesis) {
+                children.push(this.MediaQueryList());
+            }
+
+            return children;
+        },
+        block: null
+    }
+};