###############################################################################
# BRLTTY - A background process providing access to the console screen (when in
#          text mode) for a blind person using a refreshable braille display.
#
# Copyright (C) 1995-2021 by The BRLTTY Developers.
#
# BRLTTY comes with ABSOLUTELY NO WARRANTY.
#
# This is free software, placed under the terms of the
# GNU Lesser General Public License, as published by the Free Software
# Foundation; either version 2.1 of the License, or (at your option) any
# later version. Please see the file LICENSE-LGPL for details.
#
# Web Page: http://brltty.app/
#
# This software is maintained by Dave Mielke <dave@mielke.cc>.
###############################################################################

# This BRLTTY text subtable defines several useful character aliases

# ensure that space is defined
ifNotGlyph \s
  ifCell 0
    glyph \s 0
  else
    char \s 0
  endIf
endIf

# characters that represent a space
alias	\xA0	\s	# no-break space
alias	\u2002	\s	# en space
alias	\u2003	\s	# em space
alias	\u2004	\s	# three-per-em space
alias	\u2005	\s	# four-per-em space
alias	\u2006	\s	# six-per-em space
alias	\u2007	\s	# figure space
alias	\u2008	\s	# punctuation space
alias	\u2009	\s	# thin space
alias	\u200A	\s	# hair space
alias	\u202F	\s	# narrow no-break space
alias	\u205F	\s	# medium mathematical space

ifGlyph -
  # characters that represent a dash
  alias	\u2012	-	# figure dash
  alias	\u2013	-	# en dash
  alias	\u2014	-	# em dash
  alias	\u2448	-	# ocr dash
  alias	\u301C	-	# wave dash
  alias	\u3030	-	# wavy dash
  alias	\uFE58	-	# small em dash

  # characters that represent a hyphen
  alias	\xAD	-	# soft hyphen
  alias	\u2010	-	# hyphen
  alias	\u2011	-	# non-breaking hyphen

  # characters that represent a minus sign
  alias	\u2052	-	# commercial minus sign
  alias	\u2212	-	# minus sign

  # characters that can represent either a hyphen or a minus sign
  alias	\uFE63	-	# small hyphen-minus
  alias	\uFF0D	-	# fullwidth hyphen-minus

  # other characters that can look like a dash
  alias	\u2015	-	# horizontal bar
endIf

ifGlyph '
  # characters commonly (mis)used to represent an apostrophe
  alias	\u2018	'	# left single quotation mark
  alias	\u2019	'	# right single quotation mark
endIf

# degree signs
ifGlyph	C	alias	\u2103	C	# degree Celsius
ifGlyph	F	alias	\u2109	F	# degree Fahrenheit