component-layers.rb

component-layers.rb

# Right-click an Instance to move it and all sub-components
# to a new set of Layers prefixed by component name.
# Use to keep imported models off your Layers.
#
module JF
  module ComponentLayers

    def self.separator
      "__"
    end

    def self.hash_by_layer(ent, h)
      layer = ent.layer
      h[layer] << ent
      if ent.is_a? Sketchup::Group
        ent.entities.each {|e| hash_by_layer(e, h)}
      elsif ent.is_a? Sketchup::ComponentInstance
        ent.definition.entities.each {|e| hash_by_layer(e, h)}
      end
    end

    UI.add_context_menu_handler do |menu|
      menu.add_item("Componet Layers") do
        model = Sketchup.active_model
        sel = model.selection[0]
        res = UI.inputbox(["Prefix"], [sel.definition.name], "Prefix")
        if res && !res[0].empty?
          model.start_operation("Component Layers", true)
          h = Hash.new{|h,k| h[k] = []}
          JF::ComponentLayers.hash_by_layer(sel, h)
          h.each {|layer, ent_ary|
            if layer.name.index("#{res[0]}#{separator()}") == 0
              new_name = layer.name
            else
              new_name = "#{res[0]}#{separator()}#{layer.name}"
            end
            new_layer = Sketchup.active_model.layers.add(new_name)
            new_layer.visible = layer.visible?
            new_layer.color = layer.color
            new_layer.page_behavior = layer.page_behavior
            ent_ary.each {|entity| entity.layer = new_layer }
          }
          model.layers.purge_unused
          model.commit_operation
        end
      end
    end # menu

  end # ComponentLayers
end # JF