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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 encoder, options
line_kind = nil
state = :initial
# TODO: Cache scanners
content_lang = nil
until eos?
if match = scan(/\n/)
if line_kind
encoder.end_line line_kind
line_kind = nil
end
encoder.text_token match, :space
next
end
case state
when :initial
if match = scan(/--- |\+\+\+ |=+|_+/)
encoder.begin_line line_kind = :head
encoder.text_token match, :head
if match = scan(/.*?(?=$|[\t\n\x00]| \(revision)/)
encoder.text_token match, :filename
content_lang = FileType.fetch match, :plaintext
end
next unless match = scan(/.+/)
encoder.text_token match, :plain
elsif match = scan(/Index: |Property changes on: /)
encoder.begin_line line_kind = :head
encoder.text_token match, :head
next unless match = scan(/.+/)
encoder.text_token match, :plain
elsif match = scan(/Added: /)
encoder.begin_line line_kind = :head
encoder.text_token match, :head
next unless match = scan(/.+/)
encoder.text_token match, :plain
state = :added
elsif match = scan(/\\ /)
encoder.begin_line line_kind = :change
encoder.text_token match, :change
next unless match = scan(/.+/)
encoder.text_token match, :plain
elsif match = scan(/@@(?>[^@\n]*)@@/)
if check(/\n|$/)
encoder.begin_line line_kind = :change
else
encoder.begin_group :change
end
encoder.text_token match[0,2], :change
encoder.text_token match[2...-2], :plain if match.size > 4
encoder.text_token match[-2,2], :change
encoder.end_group :change unless line_kind
next unless match = scan(/.+/)
CodeRay.scan match, content_lang, :tokens => encoder
next
elsif match = scan(/\+/)
encoder.begin_line line_kind = :insert
encoder.text_token match, :insert
next unless match = scan(/.+/)
CodeRay.scan match, content_lang, :tokens => encoder
next
elsif match = scan(/-/)
encoder.begin_line line_kind = :delete
encoder.text_token match, :delete
next unless match = scan(/.+/)
CodeRay.scan match, content_lang, :tokens => encoder
next
elsif match = scan(/ .*/)
CodeRay.scan match, content_lang, :tokens => encoder
next
elsif match = scan(/.+/)
encoder.begin_line line_kind = :comment
encoder.text_token match, :plain
else
raise_inspect 'else case rached'
end
when :added
if match = scan(/ \+/)
encoder.begin_line line_kind = :insert
encoder.text_token match, :insert
next unless match = scan(/.+/)
encoder.text_token match, :plain
else
state = :initial
next
end
end
end
encoder.end_line line_kind if line_kind
encoder
end
end
end
end
|
