fix recursive iframe

src/graphics/ui/elements/InlineFrame.cpp

@@ -25,8 +25,12 @@ void InlineFrame::setDocument(const std::shared_ptr<UiDocument>& document) {
     if (document == nullptr) {
         return;
     }
+    auto newRoot = document->getRoot();
+    if (newRoot->hasParent()) {
+        return;
+    }
     this->document = document;
-    this->root = document->getRoot();
+    this->root = std::move(newRoot);
     add(root);
 
     root->setSize(size);

src/graphics/ui/elements/UINode.cpp

@@ -60,6 +60,10 @@ bool UINode::isHover() const {
     return hover;
 }
 
+bool UINode::hasParent() const {
+    return parent != nullptr;
+}
+
 void UINode::setParent(UINode* node) {
     parent = node;
 }

src/graphics/ui/elements/UINode.hpp

@@ -176,6 +176,7 @@ namespace gui {
         void setMouseOver(bool flag);
 
         virtual void setParent(UINode* node);
+        bool hasParent() const;
         UINode* getParent() const;
         std::shared_ptr<UINode> getParentShared() const;