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#!/usr/bin/env python3
"""
Generate src/bin/termptydbl.{c,h} from unicode files
used with ucd.all.flat.xml from
https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.flat.zip
"""
import argparse
from collections import namedtuple
import xml.etree.ElementTree as ET
URange = namedtuple('unicode_range', ['width', 'start', 'end'])
def get_ranges(xmlfile):
tree = ET.parse(xmlfile)
root = tree.getroot()
repertoire = root.find("{http://www.unicode.org/ns/2003/ucd/1.0}repertoire")
chars = repertoire.findall("{http://www.unicode.org/ns/2003/ucd/1.0}char")
ranges_basic = []
ranges_emoji_double = []
r_basic = URange('N', 0, 0)
r_emoji_dbl = URange('N', 0, 0)
for c in chars:
ea = c.get('ea')
if ea in ('Na', 'H'):
ea = 'N'
if ea in ('F'):
ea = 'W'
cp = c.get('cp')
if not cp:
continue
cp = int(cp, 16)
# basic
if ea != r_basic[0]:
ranges_basic.append(r_basic)
r_basic = URange(ea, cp, cp)
else:
r_basic = r_basic._replace(end=cp)
# emoji as wide
ext_pic = c.get('ExtPict')
emoji = c.get('Emoji')
if emoji == 'Y' and ext_pic == 'Y' and ea != 'A':
ea = 'W'
else:
blk = c.get('blk')
if blk == 'Misc_Pictographs':
ea = 'W'
if ea != r_emoji_dbl[0]:
ranges_emoji_double.append(r_emoji_dbl)
r_emoji_dbl = URange(ea, cp, cp)
else:
r_emoji_dbl = r_emoji_dbl._replace(end=cp)
ranges_basic.append(r_basic)
ranges_emoji_double.append(r_emoji_dbl)
return (ranges_basic, ranges_emoji_double)
def merge_ranges(ranges, is_same_width):
res = []
cur_range = ranges[0]
for r in ranges:
if is_same_width(r, cur_range):
cur_range = cur_range._replace(end=r.end)
else:
res.append(cur_range)
cur_range = r
res.append(cur_range)
return res
def skip_ranges(ranges, width_skipped):
res = []
for r in ranges:
if r.width not in width_skipped:
res.append(r)
return res
def gen_header(mininum_codepoint, file_header):
file_header.write(
"""/* XXX: Code generated by tool unicode_dbl_width.py */
#ifndef TERMINOLOGY_TERMPTY_DBL_H_
#define TERMINOLOGY_TERMPTY_DBL_H_ 1
Eina_Bool _termpty_is_wide(const Eina_Unicode g, Eina_Bool emoji_dbl_width);
Eina_Bool _termpty_is_ambigous_wide(const Eina_Unicode g, Eina_Bool emoji_dbl_width);
static inline Eina_Bool
_termpty_is_dblwidth_get(const Termpty *ty, const Eina_Unicode g)
{
/* optimize for latin1 non-ambiguous */
""")
file_header.write(f" if (g <= 0x{mininum_codepoint:X})")
file_header.write(
"""
return EINA_FALSE;
if (!ty->termstate.cjk_ambiguous_wide)
return _termpty_is_wide(g, ty->config->emoji_dbl_width);
else
return _termpty_is_ambigous_wide(g, ty->config->emoji_dbl_width);
}
#endif
""")
def gen_ambigous(ranges_basic, ranges_emoji_double, file_source):
def handle_ranges(ranges):
def is_same_width(r1, r2):
if r1.width == 'N':
return r2.width == 'N'
else:
return r2.width in ('A', 'W')
ranges = merge_ranges(ranges[1:], is_same_width)
ranges = skip_ranges(ranges, ('N',))
fallthrough = " EINA_FALLTHROUGH;"
for idx, r in enumerate(ranges):
if r.width == 'N':
continue;
if idx == len(ranges) -1:
fallthrough = ""
if r.start == r.end:
file_source.write(f" case 0x{r.start:X}:{fallthrough}\n")
else:
file_source.write(f" case 0x{r.start:X} ... 0x{r.end:X}:{fallthrough}\n")
file_source.write(
"""
__attribute__((const))
Eina_Bool
_termpty_is_ambigous_wide(Eina_Unicode g, Eina_Bool emoji_dbl_width)
{
if (emoji_dbl_width)
{
switch (g)
{
""")
handle_ranges(ranges_emoji_double)
file_source.write(
""" return EINA_TRUE;
}
}
else
{
switch (g)
{
""")
handle_ranges(ranges_basic)
file_source.write(
""" return EINA_TRUE;
}
}
return EINA_FALSE;
}
""")
def gen_wide(ranges_basic, ranges_emoji_double, file_source):
def handle_ranges(ranges):
def is_same_width(r1, r2):
if r1.width in ('N', 'A'):
return r2.width in ('N', 'A')
else:
return r2.width == 'W'
ranges = merge_ranges(ranges[1:], is_same_width)
ranges = skip_ranges(ranges, ('N', 'A'))
fallthrough = " EINA_FALLTHROUGH;"
for idx, r in enumerate(ranges):
if r.width in ('N', 'A'):
continue;
if idx == len(ranges) -1:
fallthrough = ""
if r.start == r.end:
file_source.write(f" case 0x{r.start:X}:{fallthrough}\n")
else:
file_source.write(f" case 0x{r.start:X} ... 0x{r.end:X}:{fallthrough}\n")
file_source.write(
"""
__attribute__((const))
Eina_Bool
_termpty_is_wide(Eina_Unicode g, Eina_Bool emoji_dbl_width)
{
if (emoji_dbl_width)
{
switch (g)
{
""")
handle_ranges(ranges_emoji_double)
file_source.write(
""" return EINA_TRUE;
}
}
else
{
switch (g)
{
""")
handle_ranges(ranges_basic)
file_source.write(
""" return EINA_TRUE;
}
}
return EINA_FALSE;
}
""")
def gen_c(ranges_basic, ranges_emoji_double, file_header, file_source):
mininum_codepoint = min(ranges_basic[0].end, ranges_emoji_double[0].end)
gen_header(mininum_codepoint, file_header)
file_source.write(
"""/* XXX: Code generated by tool unicode_dbl_width.py */
#include "private.h"
#include <Elementary.h>
#include "termpty.h"
#include "termptydbl.h"
""")
gen_ambigous(ranges_basic, ranges_emoji_double, file_source)
gen_wide(ranges_basic, ranges_emoji_double, file_source)
parser = argparse.ArgumentParser(description='Generate code handling different widths of unicode codepoints.')
parser.add_argument('xml', type=argparse.FileType('r'))
parser.add_argument('header', type=argparse.FileType('w'))
parser.add_argument('source', type=argparse.FileType('w'))
args = parser.parse_args()
(ranges_basic, ranges_emoji_double) = get_ranges(args.xml)
gen_c(ranges_basic, ranges_emoji_double, args.header, args.source)
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