Class: Amber::Menu

Inherits:
Object
  • Object
show all
Defined in:
lib/amber/menu.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, parent = nil) ⇒ Menu 



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# File 'lib/amber/menu.rb', line 20

def initialize(name, parent=nil)
  self.name = name
  self.parent = parent
  self.children = []
end

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children.



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# File 'lib/amber/menu.rb', line 8

def children
  @children
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/amber/menu.rb', line 9

def name
  @name
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/amber/menu.rb', line 7

def parent
  @parent
end

Instance Method Details

#each(&block) ⇒ Object 



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# File 'lib/amber/menu.rb', line 58

def each(&block)
  children.each(&block)
end

#inspect(indent = 0) ⇒ Object 



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# File 'lib/amber/menu.rb', line 88

def inspect(indent=0)
  lines = []
  lines << '  '*indent + '- ' + self.name
  self.children.each do |child|
    lines << child.inspect(indent+1)
  end
  lines.join("\n")
end

#leaf_for_path?(path) ⇒ Boolean

returns true if this menu item is the terminus menu item for path. (meaning that there are no children that match more path segments)



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# File 'lib/amber/menu.rb', line 81

def leaf_for_path?(path)
  return false unless path_prefix_of?(path)
  next_path_segment = (path - self.path).first
  return false if next_path_segment.nil?
  return !children.detect {|i| i.name == next_path_segment}
end

#load(menu_file_path) ⇒ Object

load the menu.txt file and build the in-memory menu array



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# File 'lib/amber/menu.rb', line 14

def load(menu_file_path)
  File.open(menu_file_path) do |file|
    parse_menu(file)
  end
end

#path ⇒ Object

returns path from root to this leaf as an array



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# File 'lib/amber/menu.rb', line 44

def path
  @path ||= begin
    if parent == nil
      []
    else
      parent.path + [name]
    end
  end
end

#path_prefix_of?(full_path) ⇒ Boolean 



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# File 'lib/amber/menu.rb', line 73

def path_prefix_of?(full_path)
  array_starts_with?(full_path, path)
end

#path_starts_with?(path_prefix) ⇒ Boolean

returns true if menu’s path starts with path_prefix



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# File 'lib/amber/menu.rb', line 69

def path_starts_with?(path_prefix)
  array_starts_with?(path, path_prefix)
end

#path_str ⇒ Object 



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# File 'lib/amber/menu.rb', line 54

def path_str
  @path_str ||= path.join('/')
end

#size ⇒ Object 



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# File 'lib/amber/menu.rb', line 62

def size
  children.size
end

#submenu(item_name = nil) ⇒ Object

returns the menu under the item that matches item_name.



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# File 'lib/amber/menu.rb', line 33

def submenu(item_name=nil)
  if item_name
    self.children.detect {|child| child.name == item_name}
  else
    self.children
  end
end