# Liblouis: Danish table for 6 dots grade 1 forward and backward translation (1993)
#
#  Copyright (C) 2014, 2016-2021, 2023, Bue Vester-Andersen <bue@vester-andersen.dk>
#
#  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.
#
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#  License along with liblouis. If not, see
#  <http://www.gnu.org/licenses/>.
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# Version: Bue Vester-Andersen, December 2022

### Table Metadata

#-name: Dansk fuldskrift 6-punkt 1993
#-index-name: Danish, uncontracted, 6-dot, 1993
#-display-name: Danish 6-dot uncontracted braille (1993 standard)

#+language: da
#+type: literary
#+contraction: no
#+grade: 1
#+dots: 6
#+direction: both
#+system: ddp
#+version: 1993

# Display opcodes
include da-dk-octobraille_1993.dis

### Spaces

# These ctrl-chars have to have a representation, so that they can be properly converted back and forth.
space \t 2478 CHARACTER TABULATION
space \n 678 LINE FEED (LF)
space \v 1368 LINE TABULATION
space \f 12378 FORM FEED (FF)
space \r 257 CARRIAGE RETURN (CR)
space \x00a0 a

include spaces.uti

### Character definitions

# Definition of dot cells
punctuation ! 235 EXCLAMATION MARK
punctuation " 2356 QUOTATION MARK
sign & 12346 AMPERSAND
punctuation ' 4 APOSTROPHE
punctuation ( 236 LEFT PARENTHESIS
punctuation ) 356 RIGHT PARENTHESIS
punctuation * 35 ASTERISK
punctuation , 2 COMMA
punctuation - 36 HYPHEN-MINUS
punctuation . 3 FULL STOP
punctuation / 34 SLASH
punctuation : 25 COLON
punctuation ; 23 SEMICOLON
punctuation ? 26 QUESTION MARK
include latinLetterDef6Dots.uti

include digits6Dots.uti

punctuation \x00a7 346 SECTION SIGN (0xa7)

lowercase \x00e5 16 LATIN LETTER A WITH RING ABOVE
lowercase \x00e6 345 LATIN LETTER AE
lowercase \x00f8 246 LATIN LETTER O WITH STROKE
lowercase \x00fc 1256 LATIN LETTER U WITH DIAERESIS

base uppercase \x00c5 \x00e5 LATIN LETTER A WITH RING ABOVE
base uppercase \x00c6 \x00e6 LATIN LETTER AE
base uppercase \x00d8 \x00f8 LATIN LETTER O WITH STROKE
base uppercase \x00dc \x00fc LATIN LETTER U WITH DIAERESIS

math \x00f7 256 DIVISION SIGN

# cover all other Braille patterns
include braille-patterns.cti

# Characters with two or more cells

punctuation # 45-3456 NUMBER SIGN
sign $ 45-256 DOLLAR SIGN
math % 245-356 PERCENT SIGN
#sign & 6-12346 AMPERSAND
#punctuation * 6-35 ASTERISK
math + 45-235 PLUS SIGN
math < 45-134 LESS-THAN SIGN
math = 45-2356 EQUALS SIGN
math > 45-234 GREATER-THAN SIGN
sign @ 45-1 COMMERCIAL AT
punctuation [ 5-236 LEFT SQUARE BRACKET
punctuation \\ 45-16 REVERSE SLASH
punctuation ] 5-356 RIGHT SQUARE BRACKET
punctuation ^ 45-346 CIRCUMFLEX ACCENT
punctuation _ 45-36 LOW LINE
punctuation ` 4 GRAVE ACCENT
punctuation { 45-246 LEFT CURLY BRACKET
punctuation | 4568 VERTICAL LINE
punctuation } 45-135 RIGHT CURLY BRACKET
punctuation ~ 467 TILDE (changed by pass 2 to not conflict with indicators

# Misc unicode characters
include da-dk-6miscChars_1993.cti

# Litdigits
include litdigits6Dots.uti
midendnumericmodechars /,.:^
undefined 26

### Braille indicators and special characters

#hyphen - 36

letsign 6

# No letsign before normal letters or letters with accents
# Letters with accents are handled by pass2.
noletsign ABCDEFGHIJKLMNOPQRSTUVWXYZÆØÅÄÖÜ\x0152
noletsign abcdefghijklmnopqrstuvwxyzæøåäöü\x00df\x0149\x0153

# Emphasis opcodes
emphclass italic
emphclass underline
emphclass bold

begemphphrase italic 56
endemphphrase italic after 56

begemphphrase bold 56
endemphphrase bold after 56

begemphphrase underline 56
endemphphrase underline after 56

capsletter 46
begcapsword 456
endcapsword 6
multind 6-46 letsign capsletter
multind 46-6 capsletter letsign
multind 6-456 letsign begcapsword

numsign 3456
multind 6-3456 letsign numsign

#class of none-space characters that demand double dashes
# Used in context lines later.
#must be the first class defined.
attribute charsWDoubleDash .,?!/:"'() # class w

### Correct - forward translation

# Chars that don't require a space before percent and permille:
attribute charsBeforePercent "(\x201e\x0084\x201c\x0093\x201d\x0094\x00ab\x00bb #class x
noback correct `["%"] *
noback correct !$sx["%"] " %"
noback correct `["\x2030"] *
noback correct !$sx["\x2030"] " \x2030"
noback correct `["\x0089"] *
noback correct !$sx["\x0089"] " \x2030"

# Chars to be treated like digits when switching back to letter mode
attribute extraDigits \x00bc\x00bd\x00be

#Use the "correct" opcode to convert chars that can't be back-translated
# and make the table more simple.

# Dashes
attribute dashes \x2013\x2014\x0096\x0097\x00ad
noback correct %dashes "-"

attribute quotes \x201e\x0084\x201c\x0093\x201d\x0094\x00ab\x00bb 
noback correct %quotes "\""

attribute apostrophes `\x201a\x0082\x2039\x008b\x2018\x0091\x2019\x0092\x203a\x009b\x00b4
noback correct %apostrophes "'"

### Correct - backward translation

# characters that may get mangled by the insertion of extra letsigns
nofor correct "\x2818" "~"
#nofor correct "\x282f" "&"
#nofor correct "\x2814" "*"

# Try to distinguish between times (\x00d7) and bullit (\x2022),
# which share the same Braille representation.
nofor correct `["\x00d7"] "\x2022" 
# nofor correct $d["\s\x00d7\s"]$d * #apparently doesn't work now
nofor correct ["\x00d7"]!$d "\x2022" 
nofor correct !$d["\x00d7"] "\x2022" 

nofor correct "\x28a0" ? # Extraneous endcaps signs
#nofor correct "\x2820" ?
nofor correct "~\\456/" "|"

### Pass 1 - Forward and backward

# Punctuations, math and numbers
#midnum , 2
#midnum . 3
# the following rule is doubtful, but probably does not apply.
#midnum - 36
endnum - 36
#midnum / 34
#midnum : 25

midnum ^ 45-346
midnum \x00d7 45-3

# Remove space between § and numbers.
noback begnum § 346
begnum §\s 346
begnum §§\s 346-346
always §§ 346-346

# Punctuation
prepunc " 2356
postpunc " 2356
prepunc - 36
postpunc - 36
nofor always \s-\s 0-36-36-0
always :- 25-36
always ;- 23-36
always --- 36-36-36
always ---- 36-36-36-36
always ----- 36-36-36-36-36

# these characters must be separated from ")" by a letsign.
attribute SepToRightpar Jj%'\x2030\x0089\x201a\x0082\x2039\x009b\x2018\x0091\x2019\x0092\x203a\x009b
after SepToRightpar always ) 6-356

prepunc ( 236
postpunc ) 356

always .) 3-356
always ... 3-3-3

always !! 235-235
always !!! 235-235-235
always !!!! 235-235-235-235
always !!!!! 235-235-235-235-235

### Context rules - forward translation

# Ensure two dashes where appropriate.
noback context $w["-"]$w @36
noback context $sw["-"]$sw @36-36
noback context `["-"]$sw @36-36
noback context $sw["-"]~ @36-36
noback context !$sw["-"]~ @36
noback context `["-"]~ @36-36

#ensure dot 6 between a digit and a letter
noback context $dy[]$u @6
noback context $dy$Spm.[]$u @6

### context - backward translation

# Ensure the correct number of dashes
nofor context @36[@36-36] "--"
nofor context [@36-36]@36 "--"
nofor context $w[@36-36]$w "--"
nofor context $sw[@36-36]$sw "-"
nofor context `[@36-36]$sw "-"
nofor context $sw[@36-36]~ "-"
nofor context `@36-36~ "-"


### Pass 2 - forward translation

# Correct tilde and vertical line
noback pass2 @467 @45-6
noback pass2 @4568 @45-456

noback pass2 @6-5 @5 # no letsign before letters with accent
noback pass2 @6-46-5 @46-5 # no letsign before cap letters with accent
noback pass2 @6-46 @46-6 # Ensure correct order

### Pass 2 - backward

### Pass 3 - forward translation

# Ensure there is only one letsign
noback pass3 @6-6 @6

# Ensure there is only one emphasis sign
noback pass3 @56-56 @56
noback pass3 @56-56-56 @56

### Pass 3 - backward translation

# save ~ and |  before inserting extra letsigns and endcapsword in pass 2.
nofor pass3 @45-6 @468 # Create alternative representation of "~"
nofor pass3 @45-456 @4568
