From b4eda697ce275dbd2143e490d29e2664057b6315 Mon Sep 17 00:00:00 2001 From: Moonchild Date: Wed, 16 Sep 2020 13:30:35 +0000 Subject: Issue #1643 - Part 1: Add GetNodeDepth() to nsContentUtils. --- dom/base/nsContentUtils.cpp | 14 ++++++++++++++ dom/base/nsContentUtils.h | 8 ++++++++ 2 files changed, 22 insertions(+) (limited to 'dom') diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp index 3568ced90..20b6beffa 100644 --- a/dom/base/nsContentUtils.cpp +++ b/dom/base/nsContentUtils.cpp @@ -9843,3 +9843,17 @@ nsContentUtils::GetClosestNonNativeAnonymousAncestor(Element* aElement) } return e; } + +/* static */ uint32_t +nsContentUtils::GetNodeDepth(nsINode* aNode) +{ + uint32_t depth = 1; + + MOZ_ASSERT(aNode, "Node shouldn't be null"); + + while ((aNode = aNode->GetParentNode())) { + ++depth; + } + + return depth; +} \ No newline at end of file diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h index 8cf105bb3..db9558d06 100644 --- a/dom/base/nsContentUtils.h +++ b/dom/base/nsContentUtils.h @@ -2763,6 +2763,14 @@ public: static bool IsCustomElementsEnabled() { return sIsCustomElementsEnabled; } + /** + * Returns the length of the parent-traversal path (in terms of the number of + * nodes) to an unparented/root node from aNode. An unparented/root node is + * considered to have a depth of 1, its children have a depth of 2, etc. + * aNode is expected to be non-null. + */ + static uint32_t GetNodeDepth(nsINode* aNode); + private: static bool InitializeEventTable(); -- cgit v1.2.3