NSOutlineView expand childs

Question

I have an NSOutlineView where I'm trying to implement "search & replace" ability but the problem is that all nodes are not getting expanding.

let nodes : [NSTreeNode] = self.getNode(contains: "any word")

for node in nodes {
  self.outlineView.expandItem(node.parent) // that only work for short index path

  let row = self.outline.row(forItem: item)
    if row >= 0 {
      self.outlineView.scrollRowToVisible(row)
      self.outlineView.selectRowIndexes(IndexSet(integer: row), byExtendingSelection: false)
    }
}

The problem is that nodes at certain level doesn't get expanded.
How can I start expanding NSTreenode(s) starting from the initial parent node to the last child parent that contains my search?

Answer 1

Recursion, expand the parent before expanding the node:

func expandNode(_ node:NSTreeNode) {
    if let parent = node.parent {
        if !outlineView.isItemExpanded(parent) {
            self.expandNode(parent)
        }
    }
    outlineView.expandItem(node)
}

self.expandNode(node)

Iterating over node.indexPath:

var treeNode = treeController.arrangedObjects
node.indexPath.forEach { index in
    treeNode = treeNode.children![index]
    if !outlineView.isItemExpanded(treeNode) {
        outlineView.expandItem(treeNode)
    }
}