Redmine/vendor/plugins/coderay-0.9.2/lib/coderay/scanners/diff.rb

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module CodeRay
module Scanners
class Diff < Scanner
register_for :diff
title 'diff output'
def scan_tokens tokens, options
line_kind = nil
state = :initial
until eos?
kind = match = nil
if match = scan(/\n/)
if line_kind
tokens << [:end_line, line_kind]
line_kind = nil
end
tokens << [match, :space]
next
end
case state
when :initial
if match = scan(/--- |\+\+\+ |=+|_+/)
tokens << [:begin_line, line_kind = :head]
tokens << [match, :head]
next unless match = scan(/.+/)
kind = :plain
elsif match = scan(/Index: |Property changes on: /)
tokens << [:begin_line, line_kind = :head]
tokens << [match, :head]
next unless match = scan(/.+/)
kind = :plain
elsif match = scan(/Added: /)
tokens << [:begin_line, line_kind = :head]
tokens << [match, :head]
next unless match = scan(/.+/)
kind = :plain
state = :added
elsif match = scan(/\\ /)
tokens << [:begin_line, line_kind = :change]
tokens << [match, :change]
next unless match = scan(/.+/)
kind = :plain
elsif scan(/(@@)((?>[^@\n]*))(@@)/)
tokens << [:begin_line, line_kind = :change]
tokens << [self[1], :change]
tokens << [self[2], :plain]
tokens << [self[3], :change]
next unless match = scan(/.+/)
kind = :plain
elsif match = scan(/\+/)
tokens << [:begin_line, line_kind = :insert]
tokens << [match, :insert]
next unless match = scan(/.+/)
kind = :plain
elsif match = scan(/-/)
tokens << [:begin_line, line_kind = :delete]
tokens << [match, :delete]
next unless match = scan(/.+/)
kind = :plain
elsif scan(/ .*/)
kind = :comment
elsif scan(/.+/)
tokens << [:begin_line, line_kind = :head]
kind = :plain
else
raise_inspect 'else case rached'
end
when :added
if match = scan(/ \+/)
tokens << [:begin_line, line_kind = :insert]
tokens << [match, :insert]
next unless match = scan(/.+/)
kind = :plain
else
state = :initial
next
end
end
match ||= matched
if $CODERAY_DEBUG and not kind
raise_inspect 'Error token %p in line %d' %
[[match, kind], line], tokens
end
raise_inspect 'Empty token', tokens unless match
tokens << [match, kind]
end
tokens << [:end_line, line_kind] if line_kind
tokens
end
end
end
end