private void visitClassNode(NodeTraversal t, Node classNode) {
String name = NodeUtil.getName(classNode);
if (name != null) {
providedNames.add(name);
}
Node extendClass = classNode.getSecondChild();
// If the superclass is something other than a qualified name, ignore it.
if (!extendClass.isQualifiedName()) {
return;
}
// Single names are likely external, but if this is running in single-file mode, they
// will not be in the externs, so add a weak usage.
if (mode == Mode.SINGLE_FILE && extendClass.isName()) {
weakUsages.put(extendClass.getString(), extendClass);
return;
}
Node root = NodeUtil.getRootOfQualifiedName(extendClass);
// It should always be a name. Extending this.something or
// super.something is unlikely.
// We only consider programmer-defined superclasses that are
// global variables, or are defined on global variables.
if (root.isName()) {
String rootName = root.getString();
Var var = t.getScope().getVar(rootName);
if (var != null && (var.isLocal() || var.isExtern())) {
// "require" not needed for these
} else {
usages.put(extendClass.getQualifiedName(), extendClass);
}
}
}
@Override
public void visit(NodeTraversal t, Node n, Node parent) {
JSDocInfo docInfo = n.getJSDocInfo();
if (docInfo != null && docInfo.isExport()) {
if (parent.isAssign() && (n.isFunction() || n.isClass())) {
JSDocInfo parentInfo = parent.getJSDocInfo();
if (parentInfo != null && parentInfo.isExport()) {
// ScopedAliases produces export annotations on both the function/class
// node and assign node, we only want to visit the assign node.
return;
}
}
String export = null;
GenerateNodeContext context = null;
switch (n.getType()) {
case Token.FUNCTION:
case Token.CLASS:
if (parent.isScript()) {
export = NodeUtil.getName(n);
context = new GenerateNodeContext(n, Mode.EXPORT);
}
break;
case Token.MEMBER_FUNCTION_DEF:
export = n.getString();
context = new GenerateNodeContext(n, Mode.EXPORT);
break;
case Token.ASSIGN:
Node grandparent = parent.getParent();
if (parent.isExprResult() && !n.getLastChild().isAssign()) {
if (grandparent != null
&& grandparent.isScript()
&& n.getFirstChild().isQualifiedName()) {
export = n.getFirstChild().getQualifiedName();
context = new GenerateNodeContext(n, Mode.EXPORT);
} else if (allowLocalExports && n.getFirstChild().isGetProp()) {
Node target = n.getFirstChild();
export = target.getLastChild().getString();
context = new GenerateNodeContext(n, Mode.EXTERN);
}
}
break;
case Token.VAR:
case Token.LET:
case Token.CONST:
if (parent.isScript()) {
if (n.getFirstChild().hasChildren() && !n.getFirstChild().getFirstChild().isAssign()) {
export = n.getFirstChild().getString();
context = new GenerateNodeContext(n, Mode.EXPORT);
}
}
break;
case Token.GETPROP:
if (allowLocalExports && parent.isExprResult()) {
export = n.getLastChild().getString();
context = new GenerateNodeContext(n, Mode.EXTERN);
}
break;
case Token.STRING_KEY:
case Token.GETTER_DEF:
case Token.SETTER_DEF:
if (allowLocalExports) {
export = n.getString();
context = new GenerateNodeContext(n, Mode.EXTERN);
}
break;
}
if (export != null) {
exports.put(export, context);
} else {
// Don't produce extra warnings for functions values of object literals
if (!n.isFunction() || !NodeUtil.isObjectLitKey(parent)) {
if (allowLocalExports) {
compiler.report(t.makeError(n, EXPORT_ANNOTATION_NOT_ALLOWED));
} else {
compiler.report(t.makeError(n, NON_GLOBAL_ERROR));
}
}
}
}
}