class Reline::History < Array def initialize(config) @config = config end def to_s 'HISTORY' end def delete_at(index) index = check_index(index) super(index) end def [](index) index = check_index(index) unless index.is_a?(Range) super(index) end def []=(index, val) index = check_index(index) super(index, String.new(val, encoding: Reline.encoding_system_needs)) end def concat(*val) val.each do |v| push(*v) end end def push(*val) # If history_size is zero, all histories are dropped. return self if @config.history_size.zero? # If history_size is negative, history size is unlimited. if @config.history_size.positive? diff = size + val.size - @config.history_size if diff > 0 if diff <= size shift(diff) else diff -= size clear val.shift(diff) end end end super(*(val.map{ |v| String.new(v, encoding: Reline.encoding_system_needs) })) end def <<(val) # If history_size is zero, all histories are dropped. return self if @config.history_size.zero? # If history_size is negative, history size is unlimited. if @config.history_size.positive? shift if size + 1 > @config.history_size end super(String.new(val, encoding: Reline.encoding_system_needs)) end private def check_index(index) index += size if index < 0 if index < -2147483648 or 2147483647 < index raise RangeError.new("integer #{index} too big to convert to `int'") end # If history_size is negative, history size is unlimited. if @config.history_size.positive? if index < -@config.history_size or @config.history_size < index raise RangeError.new("index=<#{index}>") end end raise IndexError.new("index=<#{index}>") if index < 0 or size <= index index end end