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-rwxr-xr-xht/gen-rune-width.sh84
-rw-r--r--ht/rune_width.go204
2 files changed, 288 insertions, 0 deletions
diff --git a/ht/gen-rune-width.sh b/ht/gen-rune-width.sh
new file mode 100755
index 0000000..c4889fb
--- /dev/null
+++ b/ht/gen-rune-width.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+u=https://www.unicode.org/Public/
+
+# Download and filter Unicode data files with the given category expression,
+# producing a list of possibly duplicitous codepoints in decimal format
+retrieve() {
+ curl --silent --show-error --location "$2" | perl -lne 's/#.*//; s/ //g;
+ next unless /^([0-9A-F]+)(?:\.\.([0-9A-F]+))?;('"$1"')$/;
+ print for hex $1 .. hex ($2 // $1);'
+}
+
+togo() {
+ sort -nu | perl -lne '
+ sub flush { printf "{0x%04x, 0x%04x},\n", $first, $last }
+ BEGIN { $first = $last = <> }
+ if ($_ != $last + 1) { flush; $first = $_; }
+ $last = $_;
+ END { flush if defined $first }' | column -xc 72
+}
+
+gofmt <<EOF
+// Code generated by running "go generate" in janouch.name/haven. DO NOT EDIT.
+
+package $GOPACKAGE
+
+// RuneWidth returns the column width of Go runes, using an algorithm and tables
+// derived from https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c:
+// - The null character (U+0000) has a column width of 0.
+// - Other C0/C1 control characters and DEL will lead to a return value of -1.
+// - Non-spacing and enclosing combining characters (general category code
+// Mn or Me in the Unicode database) have a column width of 0.
+// - SOFT HYPHEN (U+00AD) has a column width of 1.
+// - Other format characters (general category code Cf in the Unicode database)
+// and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+// - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) have
+// a column width of 0.
+// - Spacing characters in the East Asian Wide (W) or East Asian Full-width (F)
+// category as defined in Unicode UAX #11 have a column width of 2.
+// - All remaining characters (including all printable ISO 8859-1 and WGL4
+// characters, Unicode control characters, etc.) have a column width of 1.
+//
+// Local changes:
+// - Tables are generated from the latest available version of Unicode.
+func RuneWidth(r rune) int {
+ switch {
+ case r == 0:
+ return 0
+ case r < 32 || r >= 0x7f && r < 0xa0:
+ return -1
+ case zeroWidthRunes.contains(r):
+ return 0
+ case fullWidthRunes.contains(r):
+ return 2
+ }
+ return 1
+}
+
+type runeRange struct{ first, last rune }
+type runeRangeTable []runeRange
+
+func (table runeRangeTable) contains(r rune) bool {
+ min, max := 0, len(table)-1
+ for max >= min {
+ mid := (min + max) / 2
+ if table[mid].last < r {
+ min = mid + 1
+ } else if table[mid].first > r {
+ max = mid - 1
+ } else {
+ return true
+ }
+ }
+ return false
+}
+
+var zeroWidthRunes = runeRangeTable{
+$({ retrieve 'Me|Mn|Cf' $u/UCD/latest/ucd/extracted/DerivedGeneralCategory.txt;
+ seq 0x1160 0x11ff; echo $((0x200B)); } | grep -xv $((0x00AD)) | togo)
+}
+
+var fullWidthRunes = runeRangeTable{
+$(retrieve 'W|F' $u/UCD/latest/ucd/EastAsianWidth.txt | togo)
+}
+EOF
diff --git a/ht/rune_width.go b/ht/rune_width.go
new file mode 100644
index 0000000..080e7db
--- /dev/null
+++ b/ht/rune_width.go
@@ -0,0 +1,204 @@
+// Code generated by running "go generate" in janouch.name/haven. DO NOT EDIT.
+
+package main
+
+// RuneWidth returns the column width of Go runes, using an algorithm and tables
+// derived from https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c:
+// - The null character (U+0000) has a column width of 0.
+// - Other C0/C1 control characters and DEL will lead to a return value of -1.
+// - Non-spacing and enclosing combining characters (general category code
+// Mn or Me in the Unicode database) have a column width of 0.
+// - SOFT HYPHEN (U+00AD) has a column width of 1.
+// - Other format characters (general category code Cf in the Unicode database)
+// and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+// - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) have
+// a column width of 0.
+// - Spacing characters in the East Asian Wide (W) or East Asian Full-width (F)
+// category as defined in Unicode UAX #11 have a column width of 2.
+// - All remaining characters (including all printable ISO 8859-1 and WGL4
+// characters, Unicode control characters, etc.) have a column width of 1.
+//
+// Local changes:
+// - Tables are generated from the latest available version of Unicode.
+func RuneWidth(r rune) int {
+ switch {
+ case r == 0:
+ return 0
+ case r < 32 || r >= 0x7f && r < 0xa0:
+ return -1
+ case zeroWidthRunes.contains(r):
+ return 0
+ case fullWidthRunes.contains(r):
+ return 2
+ }
+ return 1
+}
+
+type runeRange struct{ first, last rune }
+type runeRangeTable []runeRange
+
+func (table runeRangeTable) contains(r rune) bool {
+ min, max := 0, len(table)-1
+ for max >= min {
+ mid := (min + max) / 2
+ if table[mid].last < r {
+ min = mid + 1
+ } else if table[mid].first > r {
+ max = mid - 1
+ } else {
+ return true
+ }
+ }
+ return false
+}
+
+var zeroWidthRunes = runeRangeTable{
+ {0x0300, 0x036f}, {0x0483, 0x0489}, {0x0591, 0x05bd},
+ {0x05bf, 0x05bf}, {0x05c1, 0x05c2}, {0x05c4, 0x05c5},
+ {0x05c7, 0x05c7}, {0x0600, 0x0605}, {0x0610, 0x061a},
+ {0x061c, 0x061c}, {0x064b, 0x065f}, {0x0670, 0x0670},
+ {0x06d6, 0x06dd}, {0x06df, 0x06e4}, {0x06e7, 0x06e8},
+ {0x06ea, 0x06ed}, {0x070f, 0x070f}, {0x0711, 0x0711},
+ {0x0730, 0x074a}, {0x07a6, 0x07b0}, {0x07eb, 0x07f3},
+ {0x07fd, 0x07fd}, {0x0816, 0x0819}, {0x081b, 0x0823},
+ {0x0825, 0x0827}, {0x0829, 0x082d}, {0x0859, 0x085b},
+ {0x08d3, 0x0902}, {0x093a, 0x093a}, {0x093c, 0x093c},
+ {0x0941, 0x0948}, {0x094d, 0x094d}, {0x0951, 0x0957},
+ {0x0962, 0x0963}, {0x0981, 0x0981}, {0x09bc, 0x09bc},
+ {0x09c1, 0x09c4}, {0x09cd, 0x09cd}, {0x09e2, 0x09e3},
+ {0x09fe, 0x09fe}, {0x0a01, 0x0a02}, {0x0a3c, 0x0a3c},
+ {0x0a41, 0x0a42}, {0x0a47, 0x0a48}, {0x0a4b, 0x0a4d},
+ {0x0a51, 0x0a51}, {0x0a70, 0x0a71}, {0x0a75, 0x0a75},
+ {0x0a81, 0x0a82}, {0x0abc, 0x0abc}, {0x0ac1, 0x0ac5},
+ {0x0ac7, 0x0ac8}, {0x0acd, 0x0acd}, {0x0ae2, 0x0ae3},
+ {0x0afa, 0x0aff}, {0x0b01, 0x0b01}, {0x0b3c, 0x0b3c},
+ {0x0b3f, 0x0b3f}, {0x0b41, 0x0b44}, {0x0b4d, 0x0b4d},
+ {0x0b56, 0x0b56}, {0x0b62, 0x0b63}, {0x0b82, 0x0b82},
+ {0x0bc0, 0x0bc0}, {0x0bcd, 0x0bcd}, {0x0c00, 0x0c00},
+ {0x0c04, 0x0c04}, {0x0c3e, 0x0c40}, {0x0c46, 0x0c48},
+ {0x0c4a, 0x0c4d}, {0x0c55, 0x0c56}, {0x0c62, 0x0c63},
+ {0x0c81, 0x0c81}, {0x0cbc, 0x0cbc}, {0x0cbf, 0x0cbf},
+ {0x0cc6, 0x0cc6}, {0x0ccc, 0x0ccd}, {0x0ce2, 0x0ce3},
+ {0x0d00, 0x0d01}, {0x0d3b, 0x0d3c}, {0x0d41, 0x0d44},
+ {0x0d4d, 0x0d4d}, {0x0d62, 0x0d63}, {0x0dca, 0x0dca},
+ {0x0dd2, 0x0dd4}, {0x0dd6, 0x0dd6}, {0x0e31, 0x0e31},
+ {0x0e34, 0x0e3a}, {0x0e47, 0x0e4e}, {0x0eb1, 0x0eb1},
+ {0x0eb4, 0x0eb9}, {0x0ebb, 0x0ebc}, {0x0ec8, 0x0ecd},
+ {0x0f18, 0x0f19}, {0x0f35, 0x0f35}, {0x0f37, 0x0f37},
+ {0x0f39, 0x0f39}, {0x0f71, 0x0f7e}, {0x0f80, 0x0f84},
+ {0x0f86, 0x0f87}, {0x0f8d, 0x0f97}, {0x0f99, 0x0fbc},
+ {0x0fc6, 0x0fc6}, {0x102d, 0x1030}, {0x1032, 0x1037},
+ {0x1039, 0x103a}, {0x103d, 0x103e}, {0x1058, 0x1059},
+ {0x105e, 0x1060}, {0x1071, 0x1074}, {0x1082, 0x1082},
+ {0x1085, 0x1086}, {0x108d, 0x108d}, {0x109d, 0x109d},
+ {0x1160, 0x11ff}, {0x135d, 0x135f}, {0x1712, 0x1714},
+ {0x1732, 0x1734}, {0x1752, 0x1753}, {0x1772, 0x1773},
+ {0x17b4, 0x17b5}, {0x17b7, 0x17bd}, {0x17c6, 0x17c6},
+ {0x17c9, 0x17d3}, {0x17dd, 0x17dd}, {0x180b, 0x180e},
+ {0x1885, 0x1886}, {0x18a9, 0x18a9}, {0x1920, 0x1922},
+ {0x1927, 0x1928}, {0x1932, 0x1932}, {0x1939, 0x193b},
+ {0x1a17, 0x1a18}, {0x1a1b, 0x1a1b}, {0x1a56, 0x1a56},
+ {0x1a58, 0x1a5e}, {0x1a60, 0x1a60}, {0x1a62, 0x1a62},
+ {0x1a65, 0x1a6c}, {0x1a73, 0x1a7c}, {0x1a7f, 0x1a7f},
+ {0x1ab0, 0x1abe}, {0x1b00, 0x1b03}, {0x1b34, 0x1b34},
+ {0x1b36, 0x1b3a}, {0x1b3c, 0x1b3c}, {0x1b42, 0x1b42},
+ {0x1b6b, 0x1b73}, {0x1b80, 0x1b81}, {0x1ba2, 0x1ba5},
+ {0x1ba8, 0x1ba9}, {0x1bab, 0x1bad}, {0x1be6, 0x1be6},
+ {0x1be8, 0x1be9}, {0x1bed, 0x1bed}, {0x1bef, 0x1bf1},
+ {0x1c2c, 0x1c33}, {0x1c36, 0x1c37}, {0x1cd0, 0x1cd2},
+ {0x1cd4, 0x1ce0}, {0x1ce2, 0x1ce8}, {0x1ced, 0x1ced},
+ {0x1cf4, 0x1cf4}, {0x1cf8, 0x1cf9}, {0x1dc0, 0x1df9},
+ {0x1dfb, 0x1dff}, {0x200b, 0x200f}, {0x202a, 0x202e},
+ {0x2060, 0x2064}, {0x2066, 0x206f}, {0x20d0, 0x20f0},
+ {0x2cef, 0x2cf1}, {0x2d7f, 0x2d7f}, {0x2de0, 0x2dff},
+ {0x302a, 0x302d}, {0x3099, 0x309a}, {0xa66f, 0xa672},
+ {0xa674, 0xa67d}, {0xa69e, 0xa69f}, {0xa6f0, 0xa6f1},
+ {0xa802, 0xa802}, {0xa806, 0xa806}, {0xa80b, 0xa80b},
+ {0xa825, 0xa826}, {0xa8c4, 0xa8c5}, {0xa8e0, 0xa8f1},
+ {0xa8ff, 0xa8ff}, {0xa926, 0xa92d}, {0xa947, 0xa951},
+ {0xa980, 0xa982}, {0xa9b3, 0xa9b3}, {0xa9b6, 0xa9b9},
+ {0xa9bc, 0xa9bc}, {0xa9e5, 0xa9e5}, {0xaa29, 0xaa2e},
+ {0xaa31, 0xaa32}, {0xaa35, 0xaa36}, {0xaa43, 0xaa43},
+ {0xaa4c, 0xaa4c}, {0xaa7c, 0xaa7c}, {0xaab0, 0xaab0},
+ {0xaab2, 0xaab4}, {0xaab7, 0xaab8}, {0xaabe, 0xaabf},
+ {0xaac1, 0xaac1}, {0xaaec, 0xaaed}, {0xaaf6, 0xaaf6},
+ {0xabe5, 0xabe5}, {0xabe8, 0xabe8}, {0xabed, 0xabed},
+ {0xfb1e, 0xfb1e}, {0xfe00, 0xfe0f}, {0xfe20, 0xfe2f},
+ {0xfeff, 0xfeff}, {0xfff9, 0xfffb}, {0x101fd, 0x101fd},
+ {0x102e0, 0x102e0}, {0x10376, 0x1037a}, {0x10a01, 0x10a03},
+ {0x10a05, 0x10a06}, {0x10a0c, 0x10a0f}, {0x10a38, 0x10a3a},
+ {0x10a3f, 0x10a3f}, {0x10ae5, 0x10ae6}, {0x10d24, 0x10d27},
+ {0x10f46, 0x10f50}, {0x11001, 0x11001}, {0x11038, 0x11046},
+ {0x1107f, 0x11081}, {0x110b3, 0x110b6}, {0x110b9, 0x110ba},
+ {0x110bd, 0x110bd}, {0x110cd, 0x110cd}, {0x11100, 0x11102},
+ {0x11127, 0x1112b}, {0x1112d, 0x11134}, {0x11173, 0x11173},
+ {0x11180, 0x11181}, {0x111b6, 0x111be}, {0x111c9, 0x111cc},
+ {0x1122f, 0x11231}, {0x11234, 0x11234}, {0x11236, 0x11237},
+ {0x1123e, 0x1123e}, {0x112df, 0x112df}, {0x112e3, 0x112ea},
+ {0x11300, 0x11301}, {0x1133b, 0x1133c}, {0x11340, 0x11340},
+ {0x11366, 0x1136c}, {0x11370, 0x11374}, {0x11438, 0x1143f},
+ {0x11442, 0x11444}, {0x11446, 0x11446}, {0x1145e, 0x1145e},
+ {0x114b3, 0x114b8}, {0x114ba, 0x114ba}, {0x114bf, 0x114c0},
+ {0x114c2, 0x114c3}, {0x115b2, 0x115b5}, {0x115bc, 0x115bd},
+ {0x115bf, 0x115c0}, {0x115dc, 0x115dd}, {0x11633, 0x1163a},
+ {0x1163d, 0x1163d}, {0x1163f, 0x11640}, {0x116ab, 0x116ab},
+ {0x116ad, 0x116ad}, {0x116b0, 0x116b5}, {0x116b7, 0x116b7},
+ {0x1171d, 0x1171f}, {0x11722, 0x11725}, {0x11727, 0x1172b},
+ {0x1182f, 0x11837}, {0x11839, 0x1183a}, {0x11a01, 0x11a0a},
+ {0x11a33, 0x11a38}, {0x11a3b, 0x11a3e}, {0x11a47, 0x11a47},
+ {0x11a51, 0x11a56}, {0x11a59, 0x11a5b}, {0x11a8a, 0x11a96},
+ {0x11a98, 0x11a99}, {0x11c30, 0x11c36}, {0x11c38, 0x11c3d},
+ {0x11c3f, 0x11c3f}, {0x11c92, 0x11ca7}, {0x11caa, 0x11cb0},
+ {0x11cb2, 0x11cb3}, {0x11cb5, 0x11cb6}, {0x11d31, 0x11d36},
+ {0x11d3a, 0x11d3a}, {0x11d3c, 0x11d3d}, {0x11d3f, 0x11d45},
+ {0x11d47, 0x11d47}, {0x11d90, 0x11d91}, {0x11d95, 0x11d95},
+ {0x11d97, 0x11d97}, {0x11ef3, 0x11ef4}, {0x16af0, 0x16af4},
+ {0x16b30, 0x16b36}, {0x16f8f, 0x16f92}, {0x1bc9d, 0x1bc9e},
+ {0x1bca0, 0x1bca3}, {0x1d167, 0x1d169}, {0x1d173, 0x1d182},
+ {0x1d185, 0x1d18b}, {0x1d1aa, 0x1d1ad}, {0x1d242, 0x1d244},
+ {0x1da00, 0x1da36}, {0x1da3b, 0x1da6c}, {0x1da75, 0x1da75},
+ {0x1da84, 0x1da84}, {0x1da9b, 0x1da9f}, {0x1daa1, 0x1daaf},
+ {0x1e000, 0x1e006}, {0x1e008, 0x1e018}, {0x1e01b, 0x1e021},
+ {0x1e023, 0x1e024}, {0x1e026, 0x1e02a}, {0x1e8d0, 0x1e8d6},
+ {0x1e944, 0x1e94a}, {0xe0001, 0xe0001}, {0xe0020, 0xe007f},
+ {0xe0100, 0xe01ef},
+}
+
+var fullWidthRunes = runeRangeTable{
+ {0x1100, 0x115f}, {0x231a, 0x231b}, {0x2329, 0x232a},
+ {0x23e9, 0x23ec}, {0x23f0, 0x23f0}, {0x23f3, 0x23f3},
+ {0x25fd, 0x25fe}, {0x2614, 0x2615}, {0x2648, 0x2653},
+ {0x267f, 0x267f}, {0x2693, 0x2693}, {0x26a1, 0x26a1},
+ {0x26aa, 0x26ab}, {0x26bd, 0x26be}, {0x26c4, 0x26c5},
+ {0x26ce, 0x26ce}, {0x26d4, 0x26d4}, {0x26ea, 0x26ea},
+ {0x26f2, 0x26f3}, {0x26f5, 0x26f5}, {0x26fa, 0x26fa},
+ {0x26fd, 0x26fd}, {0x2705, 0x2705}, {0x270a, 0x270b},
+ {0x2728, 0x2728}, {0x274c, 0x274c}, {0x274e, 0x274e},
+ {0x2753, 0x2755}, {0x2757, 0x2757}, {0x2795, 0x2797},
+ {0x27b0, 0x27b0}, {0x27bf, 0x27bf}, {0x2b1b, 0x2b1c},
+ {0x2b50, 0x2b50}, {0x2b55, 0x2b55}, {0x2e80, 0x2e99},
+ {0x2e9b, 0x2ef3}, {0x2f00, 0x2fd5}, {0x2ff0, 0x2ffb},
+ {0x3000, 0x303e}, {0x3041, 0x3096}, {0x3099, 0x30ff},
+ {0x3105, 0x312f}, {0x3131, 0x318e}, {0x3190, 0x31ba},
+ {0x31c0, 0x31e3}, {0x31f0, 0x321e}, {0x3220, 0x3247},
+ {0x3250, 0x32fe}, {0x3300, 0x4dbf}, {0x4e00, 0xa48c},
+ {0xa490, 0xa4c6}, {0xa960, 0xa97c}, {0xac00, 0xd7a3},
+ {0xf900, 0xfaff}, {0xfe10, 0xfe19}, {0xfe30, 0xfe52},
+ {0xfe54, 0xfe66}, {0xfe68, 0xfe6b}, {0xff01, 0xff60},
+ {0xffe0, 0xffe6}, {0x16fe0, 0x16fe1}, {0x17000, 0x187f1},
+ {0x18800, 0x18af2}, {0x1b000, 0x1b11e}, {0x1b170, 0x1b2fb},
+ {0x1f004, 0x1f004}, {0x1f0cf, 0x1f0cf}, {0x1f18e, 0x1f18e},
+ {0x1f191, 0x1f19a}, {0x1f200, 0x1f202}, {0x1f210, 0x1f23b},
+ {0x1f240, 0x1f248}, {0x1f250, 0x1f251}, {0x1f260, 0x1f265},
+ {0x1f300, 0x1f320}, {0x1f32d, 0x1f335}, {0x1f337, 0x1f37c},
+ {0x1f37e, 0x1f393}, {0x1f3a0, 0x1f3ca}, {0x1f3cf, 0x1f3d3},
+ {0x1f3e0, 0x1f3f0}, {0x1f3f4, 0x1f3f4}, {0x1f3f8, 0x1f43e},
+ {0x1f440, 0x1f440}, {0x1f442, 0x1f4fc}, {0x1f4ff, 0x1f53d},
+ {0x1f54b, 0x1f54e}, {0x1f550, 0x1f567}, {0x1f57a, 0x1f57a},
+ {0x1f595, 0x1f596}, {0x1f5a4, 0x1f5a4}, {0x1f5fb, 0x1f64f},
+ {0x1f680, 0x1f6c5}, {0x1f6cc, 0x1f6cc}, {0x1f6d0, 0x1f6d2},
+ {0x1f6eb, 0x1f6ec}, {0x1f6f4, 0x1f6f9}, {0x1f910, 0x1f93e},
+ {0x1f940, 0x1f970}, {0x1f973, 0x1f976}, {0x1f97a, 0x1f97a},
+ {0x1f97c, 0x1f9a2}, {0x1f9b0, 0x1f9b9}, {0x1f9c0, 0x1f9c2},
+ {0x1f9d0, 0x1f9ff}, {0x20000, 0x2fffd}, {0x30000, 0x3fffd},
+}
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-22 00:19:26 +0000