/**
* Updates the first initialization (a.k.a "declaration") of a global name that occurs at a VAR
* node. See comment for {@link #updateObjLitOrFunctionDeclaration}.
*
* @param n An object representing a global name (e.g. "a")
*/
private void updateObjLitOrFunctionDeclarationAtVarNode(Name n, boolean canCollapseChildNames) {
if (!canCollapseChildNames) {
return;
}
Ref ref = n.getDeclaration();
String name = ref.node.getString();
Node rvalue = ref.node.getFirstChild();
Node varNode = ref.node.getParent();
Node grandparent = varNode.getParent();
boolean isObjLit = rvalue.isObjectLit();
int numChanges = 0;
if (isObjLit) {
numChanges +=
declareVarsForObjLitValues(
n, name, rvalue, varNode, grandparent.getChildBefore(varNode), grandparent);
}
numChanges += addStubsForUndeclaredProperties(n, name, grandparent, varNode);
if (isObjLit && n.canEliminate()) {
varNode.removeChild(ref.node);
if (!varNode.hasChildren()) {
grandparent.removeChild(varNode);
}
numChanges++;
// Clear out the object reference, since we've eliminated it from the
// parse tree.
ref.node = null;
}
if (numChanges > 0) {
compiler.reportCodeChange();
}
}
/**
* Updates the first initialization (a.k.a "declaration") of a global name that occurs at an
* ASSIGN node. See comment for {@link #updateObjLitOrFunctionDeclaration}.
*
* @param n An object representing a global name (e.g. "a", "a.b.c")
* @param alias The flattened name for {@code n} (e.g. "a", "a$b$c")
*/
private void updateObjLitOrFunctionDeclarationAtAssignNode(
Name n, String alias, boolean canCollapseChildNames) {
// NOTE: It's important that we don't add additional nodes
// (e.g. a var node before the exprstmt) because the exprstmt might be
// the child of an if statement that's not inside a block).
Ref ref = n.getDeclaration();
Node rvalue = ref.node.getNext();
Node varNode = new Node(Token.VAR);
Node varParent = ref.node.getAncestor(3);
Node grandparent = ref.node.getAncestor(2);
boolean isObjLit = rvalue.isObjectLit();
boolean insertedVarNode = false;
if (isObjLit && n.canEliminate()) {
// Eliminate the object literal altogether.
varParent.replaceChild(grandparent, varNode);
ref.node = null;
insertedVarNode = true;
} else if (!n.isSimpleName()) {
// Create a VAR node to declare the name.
if (rvalue.isFunction()) {
checkForHosedThisReferences(rvalue, n.docInfo, n);
}
ref.node.getParent().removeChild(rvalue);
Node nameNode = NodeUtil.newName(compiler, alias, ref.node.getAncestor(2), n.getFullName());
JSDocInfo info = NodeUtil.getBestJSDocInfo(ref.node.getParent());
if (ref.node.getLastChild().getBooleanProp(Node.IS_CONSTANT_NAME)
|| (info != null && info.isConstant())) {
nameNode.putBooleanProp(Node.IS_CONSTANT_NAME, true);
}
if (info != null) {
varNode.setJSDocInfo(info);
}
varNode.addChildToBack(nameNode);
nameNode.addChildToFront(rvalue);
varParent.replaceChild(grandparent, varNode);
// Update the node ancestry stored in the reference.
ref.node = nameNode;
insertedVarNode = true;
}
if (canCollapseChildNames) {
if (isObjLit) {
declareVarsForObjLitValues(
n, alias, rvalue, varNode, varParent.getChildBefore(varNode), varParent);
}
addStubsForUndeclaredProperties(n, alias, varParent, varNode);
}
if (insertedVarNode) {
if (!varNode.hasChildren()) {
varParent.removeChild(varNode);
}
compiler.reportCodeChange();
}
}