class RubyLsp::Requests::SelectionRanges

Note that if using VSCode Neovim, you will need to be in Insert mode for this to work correctly.
Trigger this request with: Ctrl + Shift + -> or Ctrl + Shift + <-
of their cursor(s).
request informs the editor of ranges that the user may want to select based on the location(s)
The [selection ranges](microsoft.github.io/language-server-protocol/specification#textDocument_selectionRange)

def initialize(document)

: ((RubyDocument | ERBDocument) document) -> void 
def initialize(document)
  super()
  @document = document
  @ranges = [] #: Array[Support::SelectionRange]
  @stack = [] #: Array[Support::SelectionRange]
end

def perform

: -> (Array[Support::SelectionRange] & Object)
@override 
def perform
  # [node, parent]
  queue = [[@document.ast, nil]]
  until queue.empty?
    node, parent = queue.shift
    next unless node
    range = Support::SelectionRange.new(range: range_from_location(node.location), parent: parent)
    queue.unshift(*node.child_nodes.map { |child| [child, range] })
    @ranges.unshift(range)
  end
  @ranges
end