task 359: add flamegraph zoom interactions

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/tui/flamegraph/zoom.go b/internal/tui/flamegraph/zoom.go
new file mode 100644
index 0000000..7a3aa42
--- /dev/null
+++ b/internal/tui/flamegraph/zoom.go
@@ -0,0 +1,39 @@
+package flamegraph
+
+import "strings"
+
+func findNodeByPath(root *snapshotNode, path string) *snapshotNode {
+	if root == nil {
+		return nil
+	}
+	if path == "" {
+		return root
+	}
+	parts := strings.Split(path, pathSeparator)
+	if len(parts) == 0 {
+		return root
+	}
+	rootName := frameName(root.Name, 0)
+	if parts[0] == rootName {
+		parts = parts[1:]
+	}
+
+	node := root
+	for _, part := range parts {
+		next := findChildByName(node, part)
+		if next == nil {
+			return nil
+		}
+		node = next
+	}
+	return node
+}
+
+func findChildByName(node *snapshotNode, name string) *snapshotNode {
+	for _, child := range node.Children {
+		if child.Name == name || frameName(child.Name, 1) == name {
+			return child
+		}
+	}
+	return nil
+}