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#!/usr/bin/awk -f
## Copyright (C) 2020 Free Software Foundation, Inc.
## Author: Robert Pluim <rpluim@gmail.com>
## This file is part of GNU Emacs.
## GNU Emacs is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
## GNU Emacs 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 General Public License for more details.
## You should have received a copy of the GNU General Public License
## along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
### Commentary:
## This script takes as input Unicode's emoji-zwj-sequences.txt
## and produces output for Emacs's lisp/international/emoji-zwj.el.
## It also outputs the composition sequences for flags, UK flags, and
## skin tones which have been derived from emoji-sequences.txt by hand.
## For additional details, see <https://debbugs.gnu.org/39799#8>.
## Things to do after installing a new version of
## emoji-zwj-sequences.txt and emoji-sequences.txt
## Check the output against the old output. See if there are any new
## composition sequences in emoji-sequences.txt that that need to be
## added Rebuild emacs, visit emoji-zwj-sequences.txt and
## emoji-sequences.txt and check that the various sequences are being
## composed properly. Don't forget to install an appropriate font,
## such as Noto Color Emoji.
### Code:
/^[0-9A-F]/ {
sub(/ *;.*/, "", $0)
num = split($0, elts)
if (ch[elts[1]] == "")
{
vec[elts[1]] = ""
ch[elts[1]] = elts[1]
}
else
{
vec[elts[1]] = vec[elts[1]] "\n"
}
vec[elts[1]] = vec[elts[1]] "\""
for (j = 1; j <= num; j++)
{
c = sprintf("\\N{U+%s}", elts[j])
vec[elts[1]] = vec[elts[1]] c
}
vec[elts[1]] = vec[elts[1]] "\""
}
END {
print ";;; emoji-zwj.el --- emoji zwj character composition table"
print ";;; Automatically generated from admin/unidata/emoji-zwj-sequences.txt"
print "(eval-when-compile (require 'regexp-opt))"
print "(dolist (elt `("
for (elt in ch)
{
printf("(#x%s .\n,(eval-when-compile (regexp-opt\n'(\n%s\n))))\n", elt, vec[elt])
}
print "))"
print " (set-char-table-range composition-function-table"
print " (car elt)"
print " (nconc (char-table-range composition-function-table (car elt))"
print " (list (vector (cdr elt)"
print " 0"
print " 'compose-gstring-for-graphic))))"
print ";; The following three blocks are derived by hand from emoji-sequences.txt"
print ";; FIXME: add support for Emoji_Keycap_Sequence once we learn how to respect FE0F/VS-16"
print ";; for ASCII characters."
print ";; Flags"
print "(set-char-table-range composition-function-table"
print " '(#x1F1E6 . #x1F1FF)"
print " (nconc (char-table-range composition-function-table '(#x1F1E6 . #x1F1FF))"
print " (list (vector \"[\\U0001F1E6-\\U0001F1FF][\\U0001F1E6-\\U0001F1FF]\""
print " 0"
print " 'compose-gstring-for-graphic))))"
print ";; UK Flags"
print "(set-char-table-range composition-function-table"
print " #x1F3F4"
print " (nconc (char-table-range composition-function-table #x1F3F4)"
print " (list (vector \"\\U0001F3F4\\U000E0067\\U000E0062\\(?:\\U000E0065\\U000E006E\\U000E0067\\|\\U000E0073\\U000E0063\\U000E0074\\|\\U000E0077\\U000E006C\\U000E0073\\)\\U000E007F\""
print " 0"
print " 'compose-gstring-for-graphic))))"
print ";; Skin tones"
print "(set-char-table-range composition-function-table"
print " '(#x1F3FB . #x1F3FF)"
print " (nconc (char-table-range composition-function-table '(#x1F3FB . #x1F3FF))"
print " (list (vector \".[\\U0001F3FB-\\U0001F3FF]\""
print " 1"
print " 'compose-gstring-for-graphic)))))"
print "\n"
print "(provide 'emoji-zwj)"
}
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