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-rw-r--r--dom/base/nsINode.cpp25
1 files changed, 25 insertions, 0 deletions
diff --git a/dom/base/nsINode.cpp b/dom/base/nsINode.cpp
index 212110b72..355bf0ebf 100644
--- a/dom/base/nsINode.cpp
+++ b/dom/base/nsINode.cpp
@@ -107,6 +107,7 @@
#include "GeometryUtils.h"
#include "nsIAnimationObserver.h"
#include "nsChildContentList.h"
+#include "mozilla/dom/NodeBinding.h"
#ifdef ACCESSIBILITY
#include "mozilla/dom/AccessibleNode.h"
@@ -250,6 +251,30 @@ nsINode::GetTextEditorRootContent(nsIEditor** aEditor)
return nullptr;
}
+nsINode* nsINode::GetRootNode(const GetRootNodeOptions& aOptions)
+{
+ if (aOptions.mComposed) {
+ if (IsInComposedDoc() && GetComposedDoc()) {
+ return OwnerDoc();
+ }
+
+ nsINode* node = this;
+ ShadowRoot* shadowRootParent = nullptr;
+ while(node) {
+ node = node->SubtreeRoot();
+ shadowRootParent = ShadowRoot::FromNode(node);
+ if (!shadowRootParent) {
+ break;
+ }
+ node = shadowRootParent->GetHost();
+ }
+
+ return node;
+ }
+
+ return SubtreeRoot();
+}
+
nsINode*
nsINode::SubtreeRoot() const
{