Method getAbsPositionNode

runtime/ui/viewmodel/filetree.go:304–332

getAbsPositionNode determines the selected screen cursor's location in the file tree, returning the selected FileNode.

(filterRegex *regexp.Regexp)

// getAbsPositionNode determines the selected screen cursor's location in the file tree, returning the selected FileNode.
func (vm *FileTreeViewModel) getAbsPositionNode(filterRegex *regexp.Regexp) (node *filetree.FileNode) {
	var visitor func(*filetree.FileNode) error
	var evaluator func(*filetree.FileNode) bool
	var dfsCounter int

	visitor = func(curNode *filetree.FileNode) error {
		if dfsCounter == vm.TreeIndex {
			node = curNode
		}
		dfsCounter++
		return nil
	}

	evaluator = func(curNode *filetree.FileNode) bool {
		regexMatch := true
		if filterRegex != nil {
			match := filterRegex.Find([]byte(curNode.Path()))
			regexMatch = match != nil
		}
		return !curNode.Parent.Data.ViewInfo.Collapsed && !curNode.Data.ViewInfo.Hidden && regexMatch
	}

	err := vm.ModelTree.VisitDepthParentFirst(visitor, evaluator)
	if err != nil {
		logrus.Errorf("unable to get node position: %+v", err)
	}

	return node
}

// ToggleCollapse will collapse/expand the selected FileNode.
func (vm *FileTreeViewModel) ToggleCollapse(filterRegex *regexp.Regexp) error {