Represents a contextual change. Contains the position and values of the elements in the old and the new sequenced enumerables as well as the action taken.
# File lib/diff/lcs/change.rb, line 135 def self.from_a(arr) Diff::LCS::Change.from_a(arr) end
# File lib/diff/lcs/change.rb, line 110 def initialize(*args) @action, @old_position, @old_element, @new_position, @new_element = *args unless Diff::LCS::Change.valid_action?(@action) raise "Invalid Change Action '#{@action}'" end unless @old_position.nil? or @old_position.kind_of? Fixnum raise "Invalid (Old) Position Type" end unless @new_position.nil? or @new_position.kind_of? Fixnum raise "Invalid (New) Position Type" end end
Simplifies a context change for use in some diff callbacks. ‘<’ actions are converted to ‘-’ and ‘>’ actions are converted to ‘+’.
# File lib/diff/lcs/change.rb, line 141 def self.simplify(event) ea = event.to_a case ea[0] when '-' ea[2][1] = nil when '<' ea[0] = '-' ea[2][1] = nil when '+' ea[1][1] = nil when '>' ea[0] = '+' ea[1][1] = nil end Diff::LCS::ContextChange.from_a(ea) end
# File lib/diff/lcs/change.rb, line 168 def <=>(other) r = @action <=> other.action r = @old_position <=> other.old_position if r.zero? r = @new_position <=> other.new_position if r.zero? r = @old_element <=> other.old_element if r.zero? r = @new_element <=> other.new_element if r.zero? r end
# File lib/diff/lcs/change.rb, line 160 def ==(other) (@action == other.action) and (@old_position == other.old_position) and (@new_position == other.new_position) and (@old_element == other.old_element) and (@new_element == other.new_element) end
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