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|
module CodeRay
module Scanners
# Scanner for output of the diff command.
#
# Alias: +patch+
class Diff < Scanner
register_for :diff
title 'diff output'
protected
require 'coderay/helpers/file_type'
def scan_tokens tokens, options
line_kind = nil
state = :initial
# TODO: Cache scanners
content_lang = nil
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]
if filename = scan(/.*?(?=$|[\t\n\x00]| \(revision)/)
tokens << [filename, :filename]
content_lang = FileType.fetch filename, :plaintext
end
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 match = scan(/@@(?>[^@\n]*)@@/)
if check(/\n|$/)
tokens << [:begin_line, line_kind = :change]
else
tokens << [:open, :change]
end
tokens << [match[0,2], :change]
tokens << [match[2...-2], :plain] if match.size > 4
tokens << [match[-2,2], :change]
tokens << [:close, :change] unless line_kind
next unless code = scan(/.+/)
CodeRay.scan code, content_lang, :tokens => tokens
next
elsif match = scan(/\+/)
tokens << [:begin_line, line_kind = :insert]
tokens << [match, :insert]
next unless match = scan(/.+/)
CodeRay.scan match, content_lang, :tokens => tokens
next
elsif match = scan(/-/)
tokens << [:begin_line, line_kind = :delete]
tokens << [match, :delete]
next unless code = scan(/.+/)
CodeRay.scan code, content_lang, :tokens => tokens
next
elsif code = scan(/ .*/)
CodeRay.scan code, content_lang, :tokens => tokens
next
elsif scan(/.+/)
tokens << [:begin_line, line_kind = :comment]
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
|
