Class: WCC::InLineDiffer

Inherits:
Object
  • Object
show all
Defined in:
lib/wcc/diff.rb

Overview

Calculates hilite based on per char side-by-side diff for two DiffItems.

Instance Method Summary collapse

Constructor Details

#initialize(a, b) ⇒ InLineDiffer

Returns a new instance of InLineDiffer.



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# File 'lib/wcc/diff.rb', line 159

def initialize(a, b)
  @a = a
  @b = b
  @a.hilite = []
  @b.hilite = []
end

Instance Method Details

#change(e) ⇒ Object 



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# File 'lib/wcc/diff.rb', line 185

def change(e)
  @a.hilite << e.old_position if not @a.hilite.include?(e.old_position)
  @b.hilite << e.new_position if not @b.hilite.include?(e.new_position)
end

#compute_hilite ⇒ Object 



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# File 'lib/wcc/diff.rb', line 166

def compute_hilite
  #puts @a.text.chars.to_a.inspect
  #puts @b.text.chars.to_a.inspect
  # HACK: Diff::LCS with plain strings fails on Ruby 1.8 even with -Ku flag but not: <string>.chars.to_a
  Diff::LCS.traverse_balanced(@a.text.chars.to_a, @b.text.chars.to_a, self)
end

#discard_a(e) ⇒ Object 



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# File 'lib/wcc/diff.rb', line 177

def discard_a(e)
  @a.hilite << e.old_position if not @a.hilite.include?(e.old_position)
end

#discard_b(e) ⇒ Object 



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# File 'lib/wcc/diff.rb', line 181

def discard_b(e)
  @b.hilite << e.new_position if not @b.hilite.include?(e.new_position)
end

#match(e) ⇒ Object 



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# File 'lib/wcc/diff.rb', line 173

def match(e)
  # don't care
end