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module CodeRay
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module Scanners
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class Diff < Scanner
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register_for :diff
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title 'diff output'
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def scan_tokens tokens, options
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line_kind = nil
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state = :initial
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until eos?
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kind = match = nil
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if match = scan(/\n/)
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if line_kind
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tokens << [:end_line, line_kind]
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line_kind = nil
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end
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tokens << [match, :space]
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next
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end
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case state
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when :initial
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if match = scan(/--- |\+\+\+ |=+|_+/)
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tokens << [:begin_line, line_kind = :head]
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tokens << [match, :head]
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next unless match = scan(/.+/)
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kind = :plain
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elsif match = scan(/Index: |Property changes on: /)
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tokens << [:begin_line, line_kind = :head]
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tokens << [match, :head]
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next unless match = scan(/.+/)
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kind = :plain
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elsif match = scan(/Added: /)
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tokens << [:begin_line, line_kind = :head]
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tokens << [match, :head]
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next unless match = scan(/.+/)
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kind = :plain
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state = :added
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elsif match = scan(/\\ /)
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tokens << [:begin_line, line_kind = :change]
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tokens << [match, :change]
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next unless match = scan(/.+/)
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kind = :plain
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elsif match = scan(/@@(?>[^@\n]*)@@/)
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if check(/\n|$/)
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tokens << [:begin_line, line_kind = :change]
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else
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tokens << [:open, :change]
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end
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tokens << [match[0,2], :change]
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tokens << [match[2...-2], :plain]
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tokens << [match[-2,2], :change]
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tokens << [:close, :change] unless line_kind
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next unless match = scan(/.+/)
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kind = :plain
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elsif match = scan(/\+/)
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tokens << [:begin_line, line_kind = :insert]
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tokens << [match, :insert]
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next unless match = scan(/.+/)
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kind = :plain
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elsif match = scan(/-/)
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tokens << [:begin_line, line_kind = :delete]
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tokens << [match, :delete]
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next unless match = scan(/.+/)
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kind = :plain
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elsif scan(/ .*/)
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kind = :comment
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elsif scan(/.+/)
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tokens << [:begin_line, line_kind = :comment]
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kind = :plain
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else
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raise_inspect 'else case rached'
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end
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when :added
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if match = scan(/ \+/)
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tokens << [:begin_line, line_kind = :insert]
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tokens << [match, :insert]
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next unless match = scan(/.+/)
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kind = :plain
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else
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state = :initial
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next
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end
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end
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match ||= matched
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if $CODERAY_DEBUG and not kind
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raise_inspect 'Error token %p in line %d' %
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[[match, kind], line], tokens
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end
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raise_inspect 'Empty token', tokens unless match
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tokens << [match, kind]
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end
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tokens << [:end_line, line_kind] if line_kind
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tokens
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end
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end
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end
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end
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