nemeth_edit_en_us_with_switch_indicators.ctb

# liblouis Table for Post-Translation Editing
#with Nemeth switch indicators added
#
#Use it for EBAE literary texts surrounding Nemeth math blocks
#Typical usecase:
# mathtextTable en-us-g1.ctb or en-us-g2.ctb
# mathexprTable nemeth.ctb
# editTable nemeth_edit_en_us_with_switch_indicators.ctb
#
#  Based on the Linux screenreader BRLTTY, copyright (C) 1999-2006 by
#  The BRLTTY Team
#
#  Copyright (C) 2004-2006 ViewPlus Technologies, Inc. www.viewplus.com
#  Copyright (C) 2004-2006 JJB Software, Inc. www.jjb-software.com
#  Copyright (C) 2023 Norbert Márkus (hamilfonz at gmail dot com),
# Hungary
#
#  This file is part of liblouis.
#
#  liblouis is free software: you can redistribute it and/or modify it
#  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.
#
#  liblouis is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with liblouis. If not, see
#  <http://www.gnu.org/licenses/>.

#This table marks the beginning and end of math blocks with Nemeth switch indicators.
#The switch indicators help distinguish literary text from technical content.
#
#liblouisutdml inserts a space before and after each math block to separate it from the literary text.
#Such spaces are often undesirable, e.g., for punctuation and grouping symbols around the math blocks.
#In many cases these signs do not take their most appropriate forms as the math blocks
#are not yet present at the stage of literary Braille translation.
#This table makes a limited attempt to reconstruct the most likely form of some of the signs
#directly preceding or following a math block and to decide which of the automatically added spaces
#are to be kept or removed.

include en-chardefs.cti
#remove any extra spaces added by shapes or ellipses at the beginning of Nemeth blocks
noback correct "\eb\s" "\eb"
repeated \s 0
#corrections after the math blocks
always \ee\s`4 1b-15-256 period
always \ee\s`6 1b-15-235 exclamation point
#Try to detect whether the math excerpt is preceded and followed by double quotes and then restore the ending quotation mark.
noback context ["`8\s\eb"] #1=1@236-1b-12
noback context #1=1["\ee\s`8"] #1=0@1b-15-356
#Otherwise consider it as a question mark following the Nemeth block
always \ee\s`8 1b-15-236
always \ee\s`1 1b-15-2 comma after the math block
#prevent the first two cells of a percent sign from being treated as a prefixed colon after the math block
always \ee\s`3p 1b-15-4-25-1234
always \ee\s`3 1b-15-25 colon
always \ee\s`2 1b-15-23 semicolon
#Try to detect whether the math excerpt is preceded and followed by single quotes (apostrophe) and then restore the ending single quotation mark.
noback context ["`'\s\eb"] #2=1@6-236-1b-12
noback context #2=1["\ee\s`'"] #2=0@1b-15-356-3
#Otherwise consider it as an apostrophe following the Nemeth block
always \ee\s`' 1b-15-3
always \ee\s- 1b-15-36 hyphen
always \ee\s99 1b-15-35-35 asterisk
always `,7\s\eb 6-2356-1b-12 left bracket before math block
always `;7\s\eb 56-2356-1b-12 left brace before math block
always `7\s\eb 2356-1b-12 left parenthesis before math block
always \ee\s`7 1b-15-2356 right parenthesis after math block
always \ee\s,8;s 1b-15-3-234 plural or possessive
always \ee\s''' 1b-15-3-3-3 horizontal ellipsis
noback context "\eb"[]$l"\ee" @56 add a letsign (letter prefix) when the math block contains a single letter only
noback context "\eb"[]","$l"\ee" @56 add a letsign to a single capital letter making up the math block
noback pass2 @1b-12 @456-146-0 add Nemeth block start indicators
noback pass2 @1b-15 @0-456-156 add Nemeth block end indicators

noback pass2 @1b-12-4-4 @456-146-0-4