Sha256: f3c0d66367d72ce4db4bab2f8cb32ef30c60d7adb3e453074a2766717161dc17
Contents?: true
Size: 1.67 KB
Versions: 11
Compression:
Stored size: 1.67 KB
Contents
# frozen_string_literal: true
module Vedeu
module Editor
# Fetches an item from a collection.
#
# @api private
#
class Item
# @param (see #initialize)
# @return (see #by_index)
def self.by_index(collection, index = nil)
new(collection, index).by_index
end
# Returns a new instance of Vedeu::Editor::Item.
#
# @param collection [Vedeu::Editor::Line|Vedeu::Editor::Lines]
# @param index [Fixnum]
# @return [Vedeu::Editor::item]
def initialize(collection, index = nil)
@collection = collection
@index = index
end
# @return [String|Vedeu::Editor::Line]
def by_index
return nil unless collection
if index_out_of_range?
last_item
elsif index_within_range?
nth_item
else
first_item
end
end
protected
# @!attribute [r] collection
# @return [Vedeu::Editor::Line|Vedeu::Editor::Lines]
attr_reader :collection
# @!attribute [r] index
# @return [Fixnum]
attr_reader :index
private
# @return [String|Vedeu::Editor::Line]
def first_item
collection[0]
end
# @return [String|Vedeu::Editor::Line]
def last_item
collection[-1]
end
# @return [String|Vedeu::Editor::Line]
def nth_item
collection[index]
end
# @return [Boolean]
def index_out_of_range?
index.nil? || index > collection.size
end
# @return [Boolean]
def index_within_range?
index > 0 && index <= collection.size
end
end # Item
end # Editor
end # Vedeu
Version data entries
11 entries across 11 versions & 1 rubygems