update deps

6 files changed, 751 insertions, 0 deletions

diff --git a/libs/wcwidth/__init__.py b/libs/wcwidth/__init__.py
new file mode 100644
index 000000000..a22c719f4
--- /dev/null
+++ b/libs/wcwidth/__init__.py
@@ -0,0 +1,4 @@
+"""wcwidth module, https://github.com/jquast/wcwidth."""
+from .wcwidth import wcwidth, wcswidth  # noqa
+
+__all__ = ('wcwidth', 'wcswidth',)
diff --git a/libs/wcwidth/table_wide.py b/libs/wcwidth/table_wide.py
new file mode 100644
index 000000000..0356c8863
--- /dev/null
+++ b/libs/wcwidth/table_wide.py
@@ -0,0 +1,112 @@
+"""Wide_Eastasian table. Created by setup.py."""
+# Generated: 2016-07-02T04:20:28.048222
+# Source: EastAsianWidth-9.0.0.txt
+# Date:  2016-05-27, 17:00:00 GMT [KW, LI]
+WIDE_EASTASIAN = (
+    (0x1100, 0x115f,),  # Hangul Choseong Kiyeok  ..Hangul Choseong Filler
+    (0x231a, 0x231b,),  # Watch                   ..Hourglass
+    (0x2329, 0x232a,),  # Left-pointing Angle Brac..Right-pointing Angle Bra
+    (0x23e9, 0x23ec,),  # Black Right-pointing Dou..Black Down-pointing Doub
+    (0x23f0, 0x23f0,),  # Alarm Clock             ..Alarm Clock
+    (0x23f3, 0x23f3,),  # Hourglass With Flowing S..Hourglass With Flowing S
+    (0x25fd, 0x25fe,),  # White Medium Small Squar..Black Medium Small Squar
+    (0x2614, 0x2615,),  # Umbrella With Rain Drops..Hot Beverage
+    (0x2648, 0x2653,),  # Aries                   ..Pisces
+    (0x267f, 0x267f,),  # Wheelchair Symbol       ..Wheelchair Symbol
+    (0x2693, 0x2693,),  # Anchor                  ..Anchor
+    (0x26a1, 0x26a1,),  # High Voltage Sign       ..High Voltage Sign
+    (0x26aa, 0x26ab,),  # Medium White Circle     ..Medium Black Circle
+    (0x26bd, 0x26be,),  # Soccer Ball             ..Baseball
+    (0x26c4, 0x26c5,),  # Snowman Without Snow    ..Sun Behind Cloud
+    (0x26ce, 0x26ce,),  # Ophiuchus               ..Ophiuchus
+    (0x26d4, 0x26d4,),  # No Entry                ..No Entry
+    (0x26ea, 0x26ea,),  # Church                  ..Church
+    (0x26f2, 0x26f3,),  # Fountain                ..Flag In Hole
+    (0x26f5, 0x26f5,),  # Sailboat                ..Sailboat
+    (0x26fa, 0x26fa,),  # Tent                    ..Tent
+    (0x26fd, 0x26fd,),  # Fuel Pump               ..Fuel Pump
+    (0x2705, 0x2705,),  # White Heavy Check Mark  ..White Heavy Check Mark
+    (0x270a, 0x270b,),  # Raised Fist             ..Raised Hand
+    (0x2728, 0x2728,),  # Sparkles                ..Sparkles
+    (0x274c, 0x274c,),  # Cross Mark              ..Cross Mark
+    (0x274e, 0x274e,),  # Negative Squared Cross M..Negative Squared Cross M
+    (0x2753, 0x2755,),  # Black Question Mark Orna..White Exclamation Mark O
+    (0x2757, 0x2757,),  # Heavy Exclamation Mark S..Heavy Exclamation Mark S
+    (0x2795, 0x2797,),  # Heavy Plus Sign         ..Heavy Division Sign
+    (0x27b0, 0x27b0,),  # Curly Loop              ..Curly Loop
+    (0x27bf, 0x27bf,),  # Double Curly Loop       ..Double Curly Loop
+    (0x2b1b, 0x2b1c,),  # Black Large Square      ..White Large Square
+    (0x2b50, 0x2b50,),  # White Medium Star       ..White Medium Star
+    (0x2b55, 0x2b55,),  # Heavy Large Circle      ..Heavy Large Circle
+    (0x2e80, 0x2e99,),  # Cjk Radical Repeat      ..Cjk Radical Rap
+    (0x2e9b, 0x2ef3,),  # Cjk Radical Choke       ..Cjk Radical C-simplified
+    (0x2f00, 0x2fd5,),  # Kangxi Radical One      ..Kangxi Radical Flute
+    (0x2ff0, 0x2ffb,),  # Ideographic Description ..Ideographic Description
+    (0x3000, 0x303e,),  # Ideographic Space       ..Ideographic Variation In
+    (0x3041, 0x3096,),  # Hiragana Letter Small A ..Hiragana Letter Small Ke
+    (0x3099, 0x30ff,),  # Combining Katakana-hirag..Katakana Digraph Koto
+    (0x3105, 0x312d,),  # Bopomofo Letter B       ..Bopomofo Letter Ih
+    (0x3131, 0x318e,),  # Hangul Letter Kiyeok    ..Hangul Letter Araeae
+    (0x3190, 0x31ba,),  # Ideographic Annotation L..Bopomofo Letter Zy
+    (0x31c0, 0x31e3,),  # Cjk Stroke T            ..Cjk Stroke Q
+    (0x31f0, 0x321e,),  # Katakana Letter Small Ku..Parenthesized Korean Cha
+    (0x3220, 0x3247,),  # Parenthesized Ideograph ..Circled Ideograph Koto
+    (0x3250, 0x32fe,),  # Partnership Sign        ..Circled Katakana Wo
+    (0x3300, 0x4dbf,),  # Square Apaato           ..
+    (0x4e00, 0xa48c,),  # Cjk Unified Ideograph-4e..Yi Syllable Yyr
+    (0xa490, 0xa4c6,),  # Yi Radical Qot          ..Yi Radical Ke
+    (0xa960, 0xa97c,),  # Hangul Choseong Tikeut-m..Hangul Choseong Ssangyeo
+    (0xac00, 0xd7a3,),  # Hangul Syllable Ga      ..Hangul Syllable Hih
+    (0xf900, 0xfaff,),  # Cjk Compatibility Ideogr..
+    (0xfe10, 0xfe19,),  # Presentation Form For Ve..Presentation Form For Ve
+    (0xfe30, 0xfe52,),  # Presentation Form For Ve..Small Full Stop
+    (0xfe54, 0xfe66,),  # Small Semicolon         ..Small Equals Sign
+    (0xfe68, 0xfe6b,),  # Small Reverse Solidus   ..Small Commercial At
+    (0xff01, 0xff60,),  # Fullwidth Exclamation Ma..Fullwidth Right White Pa
+    (0xffe0, 0xffe6,),  # Fullwidth Cent Sign     ..Fullwidth Won Sign
+    (0x16fe0, 0x16fe0,),  # (nil)                   ..
+    (0x17000, 0x187ec,),  # (nil)                   ..
+    (0x18800, 0x18af2,),  # (nil)                   ..
+    (0x1b000, 0x1b001,),  # Katakana Letter Archaic ..Hiragana Letter Archaic
+    (0x1f004, 0x1f004,),  # Mahjong Tile Red Dragon ..Mahjong Tile Red Dragon
+    (0x1f0cf, 0x1f0cf,),  # Playing Card Black Joker..Playing Card Black Joker
+    (0x1f18e, 0x1f18e,),  # Negative Squared Ab     ..Negative Squared Ab
+    (0x1f191, 0x1f19a,),  # Squared Cl              ..Squared Vs
+    (0x1f200, 0x1f202,),  # Square Hiragana Hoka    ..Squared Katakana Sa
+    (0x1f210, 0x1f23b,),  # Squared Cjk Unified Ideo..
+    (0x1f240, 0x1f248,),  # Tortoise Shell Bracketed..Tortoise Shell Bracketed
+    (0x1f250, 0x1f251,),  # Circled Ideograph Advant..Circled Ideograph Accept
+    (0x1f300, 0x1f320,),  # Cyclone                 ..Shooting Star
+    (0x1f32d, 0x1f335,),  # Hot Dog                 ..Cactus
+    (0x1f337, 0x1f37c,),  # Tulip                   ..Baby Bottle
+    (0x1f37e, 0x1f393,),  # Bottle With Popping Cork..Graduation Cap
+    (0x1f3a0, 0x1f3ca,),  # Carousel Horse          ..Swimmer
+    (0x1f3cf, 0x1f3d3,),  # Cricket Bat And Ball    ..Table Tennis Paddle And
+    (0x1f3e0, 0x1f3f0,),  # House Building          ..European Castle
+    (0x1f3f4, 0x1f3f4,),  # Waving Black Flag       ..Waving Black Flag
+    (0x1f3f8, 0x1f43e,),  # Badminton Racquet And Sh..Paw Prints
+    (0x1f440, 0x1f440,),  # Eyes                    ..Eyes
+    (0x1f442, 0x1f4fc,),  # Ear                     ..Videocassette
+    (0x1f4ff, 0x1f53d,),  # Prayer Beads            ..Down-pointing Small Red
+    (0x1f54b, 0x1f54e,),  # Kaaba                   ..Menorah With Nine Branch
+    (0x1f550, 0x1f567,),  # Clock Face One Oclock   ..Clock Face Twelve-thirty
+    (0x1f57a, 0x1f57a,),  # (nil)                   ..
+    (0x1f595, 0x1f596,),  # Reversed Hand With Middl..Raised Hand With Part Be
+    (0x1f5a4, 0x1f5a4,),  # (nil)                   ..
+    (0x1f5fb, 0x1f64f,),  # Mount Fuji              ..Person With Folded Hands
+    (0x1f680, 0x1f6c5,),  # Rocket                  ..Left Luggage
+    (0x1f6cc, 0x1f6cc,),  # Sleeping Accommodation  ..Sleeping Accommodation
+    (0x1f6d0, 0x1f6d2,),  # Place Of Worship        ..
+    (0x1f6eb, 0x1f6ec,),  # Airplane Departure      ..Airplane Arriving
+    (0x1f6f4, 0x1f6f6,),  # (nil)                   ..
+    (0x1f910, 0x1f91e,),  # Zipper-mouth Face       ..
+    (0x1f920, 0x1f927,),  # (nil)                   ..
+    (0x1f930, 0x1f930,),  # (nil)                   ..
+    (0x1f933, 0x1f93e,),  # (nil)                   ..
+    (0x1f940, 0x1f94b,),  # (nil)                   ..
+    (0x1f950, 0x1f95e,),  # (nil)                   ..
+    (0x1f980, 0x1f991,),  # Crab                    ..
+    (0x1f9c0, 0x1f9c0,),  # Cheese Wedge            ..Cheese Wedge
+    (0x20000, 0x2fffd,),  # Cjk Unified Ideograph-20..
+    (0x30000, 0x3fffd,),  # (nil)                   ..
+)
diff --git a/libs/wcwidth/table_zero.py b/libs/wcwidth/table_zero.py
new file mode 100644
index 000000000..2dcc26724
--- /dev/null
+++ b/libs/wcwidth/table_zero.py
@@ -0,0 +1,289 @@
+"""Zero_Width table. Created by setup.py."""
+# Generated: 2016-07-02T04:20:28.075504
+# Source: DerivedGeneralCategory-9.0.0.txt
+# Date:  2016-06-01, 10:34:26 GMT
+ZERO_WIDTH = (
+    (0x0300, 0x036f,),  # Combining Grave Accent  ..Combining Latin Small Le
+    (0x0483, 0x0489,),  # Combining Cyrillic Titlo..Combining Cyrillic Milli
+    (0x0591, 0x05bd,),  # Hebrew Accent Etnahta   ..Hebrew Point Meteg
+    (0x05bf, 0x05bf,),  # Hebrew Point Rafe       ..Hebrew Point Rafe
+    (0x05c1, 0x05c2,),  # Hebrew Point Shin Dot   ..Hebrew Point Sin Dot
+    (0x05c4, 0x05c5,),  # Hebrew Mark Upper Dot   ..Hebrew Mark Lower Dot
+    (0x05c7, 0x05c7,),  # Hebrew Point Qamats Qata..Hebrew Point Qamats Qata
+    (0x0610, 0x061a,),  # Arabic Sign Sallallahou ..Arabic Small Kasra
+    (0x064b, 0x065f,),  # Arabic Fathatan         ..Arabic Wavy Hamza Below
+    (0x0670, 0x0670,),  # Arabic Letter Superscrip..Arabic Letter Superscrip
+    (0x06d6, 0x06dc,),  # Arabic Small High Ligatu..Arabic Small High Seen
+    (0x06df, 0x06e4,),  # Arabic Small High Rounde..Arabic Small High Madda
+    (0x06e7, 0x06e8,),  # Arabic Small High Yeh   ..Arabic Small High Noon
+    (0x06ea, 0x06ed,),  # Arabic Empty Centre Low ..Arabic Small Low Meem
+    (0x0711, 0x0711,),  # Syriac Letter Superscrip..Syriac Letter Superscrip
+    (0x0730, 0x074a,),  # Syriac Pthaha Above     ..Syriac Barrekh
+    (0x07a6, 0x07b0,),  # Thaana Abafili          ..Thaana Sukun
+    (0x07eb, 0x07f3,),  # Nko Combining Short High..Nko Combining Double Dot
+    (0x0816, 0x0819,),  # Samaritan Mark In       ..Samaritan Mark Dagesh
+    (0x081b, 0x0823,),  # Samaritan Mark Epentheti..Samaritan Vowel Sign A
+    (0x0825, 0x0827,),  # Samaritan Vowel Sign Sho..Samaritan Vowel Sign U
+    (0x0829, 0x082d,),  # Samaritan Vowel Sign Lon..Samaritan Mark Nequdaa
+    (0x0859, 0x085b,),  # Mandaic Affrication Mark..Mandaic Gemination Mark
+    (0x08d4, 0x08e1,),  # (nil)                   ..
+    (0x08e3, 0x0902,),  # Arabic Turned Damma Belo..Devanagari Sign Anusvara
+    (0x093a, 0x093a,),  # Devanagari Vowel Sign Oe..Devanagari Vowel Sign Oe
+    (0x093c, 0x093c,),  # Devanagari Sign Nukta   ..Devanagari Sign Nukta
+    (0x0941, 0x0948,),  # Devanagari Vowel Sign U ..Devanagari Vowel Sign Ai
+    (0x094d, 0x094d,),  # Devanagari Sign Virama  ..Devanagari Sign Virama
+    (0x0951, 0x0957,),  # Devanagari Stress Sign U..Devanagari Vowel Sign Uu
+    (0x0962, 0x0963,),  # Devanagari Vowel Sign Vo..Devanagari Vowel Sign Vo
+    (0x0981, 0x0981,),  # Bengali Sign Candrabindu..Bengali Sign Candrabindu
+    (0x09bc, 0x09bc,),  # Bengali Sign Nukta      ..Bengali Sign Nukta
+    (0x09c1, 0x09c4,),  # Bengali Vowel Sign U    ..Bengali Vowel Sign Vocal
+    (0x09cd, 0x09cd,),  # Bengali Sign Virama     ..Bengali Sign Virama
+    (0x09e2, 0x09e3,),  # Bengali Vowel Sign Vocal..Bengali Vowel Sign Vocal
+    (0x0a01, 0x0a02,),  # Gurmukhi Sign Adak Bindi..Gurmukhi Sign Bindi
+    (0x0a3c, 0x0a3c,),  # Gurmukhi Sign Nukta     ..Gurmukhi Sign Nukta
+    (0x0a41, 0x0a42,),  # Gurmukhi Vowel Sign U   ..Gurmukhi Vowel Sign Uu
+    (0x0a47, 0x0a48,),  # Gurmukhi Vowel Sign Ee  ..Gurmukhi Vowel Sign Ai
+    (0x0a4b, 0x0a4d,),  # Gurmukhi Vowel Sign Oo  ..Gurmukhi Sign Virama
+    (0x0a51, 0x0a51,),  # Gurmukhi Sign Udaat     ..Gurmukhi Sign Udaat
+    (0x0a70, 0x0a71,),  # Gurmukhi Tippi          ..Gurmukhi Addak
+    (0x0a75, 0x0a75,),  # Gurmukhi Sign Yakash    ..Gurmukhi Sign Yakash
+    (0x0a81, 0x0a82,),  # Gujarati Sign Candrabind..Gujarati Sign Anusvara
+    (0x0abc, 0x0abc,),  # Gujarati Sign Nukta     ..Gujarati Sign Nukta
+    (0x0ac1, 0x0ac5,),  # Gujarati Vowel Sign U   ..Gujarati Vowel Sign Cand
+    (0x0ac7, 0x0ac8,),  # Gujarati Vowel Sign E   ..Gujarati Vowel Sign Ai
+    (0x0acd, 0x0acd,),  # Gujarati Sign Virama    ..Gujarati Sign Virama
+    (0x0ae2, 0x0ae3,),  # Gujarati Vowel Sign Voca..Gujarati Vowel Sign Voca
+    (0x0b01, 0x0b01,),  # Oriya Sign Candrabindu  ..Oriya Sign Candrabindu
+    (0x0b3c, 0x0b3c,),  # Oriya Sign Nukta        ..Oriya Sign Nukta
+    (0x0b3f, 0x0b3f,),  # Oriya Vowel Sign I      ..Oriya Vowel Sign I
+    (0x0b41, 0x0b44,),  # Oriya Vowel Sign U      ..Oriya Vowel Sign Vocalic
+    (0x0b4d, 0x0b4d,),  # Oriya Sign Virama       ..Oriya Sign Virama
+    (0x0b56, 0x0b56,),  # Oriya Ai Length Mark    ..Oriya Ai Length Mark
+    (0x0b62, 0x0b63,),  # Oriya Vowel Sign Vocalic..Oriya Vowel Sign Vocalic
+    (0x0b82, 0x0b82,),  # Tamil Sign Anusvara     ..Tamil Sign Anusvara
+    (0x0bc0, 0x0bc0,),  # Tamil Vowel Sign Ii     ..Tamil Vowel Sign Ii
+    (0x0bcd, 0x0bcd,),  # Tamil Sign Virama       ..Tamil Sign Virama
+    (0x0c00, 0x0c00,),  # Telugu Sign Combining Ca..Telugu Sign Combining Ca
+    (0x0c3e, 0x0c40,),  # Telugu Vowel Sign Aa    ..Telugu Vowel Sign Ii
+    (0x0c46, 0x0c48,),  # Telugu Vowel Sign E     ..Telugu Vowel Sign Ai
+    (0x0c4a, 0x0c4d,),  # Telugu Vowel Sign O     ..Telugu Sign Virama
+    (0x0c55, 0x0c56,),  # Telugu Length Mark      ..Telugu Ai Length Mark
+    (0x0c62, 0x0c63,),  # Telugu Vowel Sign Vocali..Telugu Vowel Sign Vocali
+    (0x0c81, 0x0c81,),  # Kannada Sign Candrabindu..Kannada Sign Candrabindu
+    (0x0cbc, 0x0cbc,),  # Kannada Sign Nukta      ..Kannada Sign Nukta
+    (0x0cbf, 0x0cbf,),  # Kannada Vowel Sign I    ..Kannada Vowel Sign I
+    (0x0cc6, 0x0cc6,),  # Kannada Vowel Sign E    ..Kannada Vowel Sign E
+    (0x0ccc, 0x0ccd,),  # Kannada Vowel Sign Au   ..Kannada Sign Virama
+    (0x0ce2, 0x0ce3,),  # Kannada Vowel Sign Vocal..Kannada Vowel Sign Vocal
+    (0x0d01, 0x0d01,),  # Malayalam Sign Candrabin..Malayalam Sign Candrabin
+    (0x0d41, 0x0d44,),  # Malayalam Vowel Sign U  ..Malayalam Vowel Sign Voc
+    (0x0d4d, 0x0d4d,),  # Malayalam Sign Virama   ..Malayalam Sign Virama
+    (0x0d62, 0x0d63,),  # Malayalam Vowel Sign Voc..Malayalam Vowel Sign Voc
+    (0x0dca, 0x0dca,),  # Sinhala Sign Al-lakuna  ..Sinhala Sign Al-lakuna
+    (0x0dd2, 0x0dd4,),  # Sinhala Vowel Sign Ketti..Sinhala Vowel Sign Ketti
+    (0x0dd6, 0x0dd6,),  # Sinhala Vowel Sign Diga ..Sinhala Vowel Sign Diga
+    (0x0e31, 0x0e31,),  # Thai Character Mai Han-a..Thai Character Mai Han-a
+    (0x0e34, 0x0e3a,),  # Thai Character Sara I   ..Thai Character Phinthu
+    (0x0e47, 0x0e4e,),  # Thai Character Maitaikhu..Thai Character Yamakkan
+    (0x0eb1, 0x0eb1,),  # Lao Vowel Sign Mai Kan  ..Lao Vowel Sign Mai Kan
+    (0x0eb4, 0x0eb9,),  # Lao Vowel Sign I        ..Lao Vowel Sign Uu
+    (0x0ebb, 0x0ebc,),  # Lao Vowel Sign Mai Kon  ..Lao Semivowel Sign Lo
+    (0x0ec8, 0x0ecd,),  # Lao Tone Mai Ek         ..Lao Niggahita
+    (0x0f18, 0x0f19,),  # Tibetan Astrological Sig..Tibetan Astrological Sig
+    (0x0f35, 0x0f35,),  # Tibetan Mark Ngas Bzung ..Tibetan Mark Ngas Bzung
+    (0x0f37, 0x0f37,),  # Tibetan Mark Ngas Bzung ..Tibetan Mark Ngas Bzung
+    (0x0f39, 0x0f39,),  # Tibetan Mark Tsa -phru  ..Tibetan Mark Tsa -phru
+    (0x0f71, 0x0f7e,),  # Tibetan Vowel Sign Aa   ..Tibetan Sign Rjes Su Nga
+    (0x0f80, 0x0f84,),  # Tibetan Vowel Sign Rever..Tibetan Mark Halanta
+    (0x0f86, 0x0f87,),  # Tibetan Sign Lci Rtags  ..Tibetan Sign Yang Rtags
+    (0x0f8d, 0x0f97,),  # Tibetan Subjoined Sign L..Tibetan Subjoined Letter
+    (0x0f99, 0x0fbc,),  # Tibetan Subjoined Letter..Tibetan Subjoined Letter
+    (0x0fc6, 0x0fc6,),  # Tibetan Symbol Padma Gda..Tibetan Symbol Padma Gda
+    (0x102d, 0x1030,),  # Myanmar Vowel Sign I    ..Myanmar Vowel Sign Uu
+    (0x1032, 0x1037,),  # Myanmar Vowel Sign Ai   ..Myanmar Sign Dot Below
+    (0x1039, 0x103a,),  # Myanmar Sign Virama     ..Myanmar Sign Asat
+    (0x103d, 0x103e,),  # Myanmar Consonant Sign M..Myanmar Consonant Sign M
+    (0x1058, 0x1059,),  # Myanmar Vowel Sign Vocal..Myanmar Vowel Sign Vocal
+    (0x105e, 0x1060,),  # Myanmar Consonant Sign M..Myanmar Consonant Sign M
+    (0x1071, 0x1074,),  # Myanmar Vowel Sign Geba ..Myanmar Vowel Sign Kayah
+    (0x1082, 0x1082,),  # Myanmar Consonant Sign S..Myanmar Consonant Sign S
+    (0x1085, 0x1086,),  # Myanmar Vowel Sign Shan ..Myanmar Vowel Sign Shan
+    (0x108d, 0x108d,),  # Myanmar Sign Shan Counci..Myanmar Sign Shan Counci
+    (0x109d, 0x109d,),  # Myanmar Vowel Sign Aiton..Myanmar Vowel Sign Aiton
+    (0x135d, 0x135f,),  # Ethiopic Combining Gemin..Ethiopic Combining Gemin
+    (0x1712, 0x1714,),  # Tagalog Vowel Sign I    ..Tagalog Sign Virama
+    (0x1732, 0x1734,),  # Hanunoo Vowel Sign I    ..Hanunoo Sign Pamudpod
+    (0x1752, 0x1753,),  # Buhid Vowel Sign I      ..Buhid Vowel Sign U
+    (0x1772, 0x1773,),  # Tagbanwa Vowel Sign I   ..Tagbanwa Vowel Sign U
+    (0x17b4, 0x17b5,),  # Khmer Vowel Inherent Aq ..Khmer Vowel Inherent Aa
+    (0x17b7, 0x17bd,),  # Khmer Vowel Sign I      ..Khmer Vowel Sign Ua
+    (0x17c6, 0x17c6,),  # Khmer Sign Nikahit      ..Khmer Sign Nikahit
+    (0x17c9, 0x17d3,),  # Khmer Sign Muusikatoan  ..Khmer Sign Bathamasat
+    (0x17dd, 0x17dd,),  # Khmer Sign Atthacan     ..Khmer Sign Atthacan
+    (0x180b, 0x180d,),  # Mongolian Free Variation..Mongolian Free Variation
+    (0x1885, 0x1886,),  # Mongolian Letter Ali Gal..Mongolian Letter Ali Gal
+    (0x18a9, 0x18a9,),  # Mongolian Letter Ali Gal..Mongolian Letter Ali Gal
+    (0x1920, 0x1922,),  # Limbu Vowel Sign A      ..Limbu Vowel Sign U
+    (0x1927, 0x1928,),  # Limbu Vowel Sign E      ..Limbu Vowel Sign O
+    (0x1932, 0x1932,),  # Limbu Small Letter Anusv..Limbu Small Letter Anusv
+    (0x1939, 0x193b,),  # Limbu Sign Mukphreng    ..Limbu Sign Sa-i
+    (0x1a17, 0x1a18,),  # Buginese Vowel Sign I   ..Buginese Vowel Sign U
+    (0x1a1b, 0x1a1b,),  # Buginese Vowel Sign Ae  ..Buginese Vowel Sign Ae
+    (0x1a56, 0x1a56,),  # Tai Tham Consonant Sign ..Tai Tham Consonant Sign
+    (0x1a58, 0x1a5e,),  # Tai Tham Sign Mai Kang L..Tai Tham Consonant Sign
+    (0x1a60, 0x1a60,),  # Tai Tham Sign Sakot     ..Tai Tham Sign Sakot
+    (0x1a62, 0x1a62,),  # Tai Tham Vowel Sign Mai ..Tai Tham Vowel Sign Mai
+    (0x1a65, 0x1a6c,),  # Tai Tham Vowel Sign I   ..Tai Tham Vowel Sign Oa B
+    (0x1a73, 0x1a7c,),  # Tai Tham Vowel Sign Oa A..Tai Tham Sign Khuen-lue
+    (0x1a7f, 0x1a7f,),  # Tai Tham Combining Crypt..Tai Tham Combining Crypt
+    (0x1ab0, 0x1abe,),  # Combining Doubled Circum..Combining Parentheses Ov
+    (0x1b00, 0x1b03,),  # Balinese Sign Ulu Ricem ..Balinese Sign Surang
+    (0x1b34, 0x1b34,),  # Balinese Sign Rerekan   ..Balinese Sign Rerekan
+    (0x1b36, 0x1b3a,),  # Balinese Vowel Sign Ulu ..Balinese Vowel Sign Ra R
+    (0x1b3c, 0x1b3c,),  # Balinese Vowel Sign La L..Balinese Vowel Sign La L
+    (0x1b42, 0x1b42,),  # Balinese Vowel Sign Pepe..Balinese Vowel Sign Pepe
+    (0x1b6b, 0x1b73,),  # Balinese Musical Symbol ..Balinese Musical Symbol
+    (0x1b80, 0x1b81,),  # Sundanese Sign Panyecek ..Sundanese Sign Panglayar
+    (0x1ba2, 0x1ba5,),  # Sundanese Consonant Sign..Sundanese Vowel Sign Pan
+    (0x1ba8, 0x1ba9,),  # Sundanese Vowel Sign Pam..Sundanese Vowel Sign Pan
+    (0x1bab, 0x1bad,),  # Sundanese Sign Virama   ..Sundanese Consonant Sign
+    (0x1be6, 0x1be6,),  # Batak Sign Tompi        ..Batak Sign Tompi
+    (0x1be8, 0x1be9,),  # Batak Vowel Sign Pakpak ..Batak Vowel Sign Ee
+    (0x1bed, 0x1bed,),  # Batak Vowel Sign Karo O ..Batak Vowel Sign Karo O
+    (0x1bef, 0x1bf1,),  # Batak Vowel Sign U For S..Batak Consonant Sign H
+    (0x1c2c, 0x1c33,),  # Lepcha Vowel Sign E     ..Lepcha Consonant Sign T
+    (0x1c36, 0x1c37,),  # Lepcha Sign Ran         ..Lepcha Sign Nukta
+    (0x1cd0, 0x1cd2,),  # Vedic Tone Karshana     ..Vedic Tone Prenkha
+    (0x1cd4, 0x1ce0,),  # Vedic Sign Yajurvedic Mi..Vedic Tone Rigvedic Kash
+    (0x1ce2, 0x1ce8,),  # Vedic Sign Visarga Svari..Vedic Sign Visarga Anuda
+    (0x1ced, 0x1ced,),  # Vedic Sign Tiryak       ..Vedic Sign Tiryak
+    (0x1cf4, 0x1cf4,),  # Vedic Tone Candra Above ..Vedic Tone Candra Above
+    (0x1cf8, 0x1cf9,),  # Vedic Tone Ring Above   ..Vedic Tone Double Ring A
+    (0x1dc0, 0x1df5,),  # Combining Dotted Grave A..Combining Up Tack Above
+    (0x1dfb, 0x1dff,),  # (nil)                   ..Combining Right Arrowhea
+    (0x20d0, 0x20f0,),  # Combining Left Harpoon A..Combining Asterisk Above
+    (0x2cef, 0x2cf1,),  # Coptic Combining Ni Abov..Coptic Combining Spiritu
+    (0x2d7f, 0x2d7f,),  # Tifinagh Consonant Joine..Tifinagh Consonant Joine
+    (0x2de0, 0x2dff,),  # Combining Cyrillic Lette..Combining Cyrillic Lette
+    (0x302a, 0x302d,),  # Ideographic Level Tone M..Ideographic Entering Ton
+    (0x3099, 0x309a,),  # Combining Katakana-hirag..Combining Katakana-hirag
+    (0xa66f, 0xa672,),  # Combining Cyrillic Vzmet..Combining Cyrillic Thous
+    (0xa674, 0xa67d,),  # Combining Cyrillic Lette..Combining Cyrillic Payer
+    (0xa69e, 0xa69f,),  # Combining Cyrillic Lette..Combining Cyrillic Lette
+    (0xa6f0, 0xa6f1,),  # Bamum Combining Mark Koq..Bamum Combining Mark Tuk
+    (0xa802, 0xa802,),  # Syloti Nagri Sign Dvisva..Syloti Nagri Sign Dvisva
+    (0xa806, 0xa806,),  # Syloti Nagri Sign Hasant..Syloti Nagri Sign Hasant
+    (0xa80b, 0xa80b,),  # Syloti Nagri Sign Anusva..Syloti Nagri Sign Anusva
+    (0xa825, 0xa826,),  # Syloti Nagri Vowel Sign ..Syloti Nagri Vowel Sign
+    (0xa8c4, 0xa8c5,),  # Saurashtra Sign Virama  ..
+    (0xa8e0, 0xa8f1,),  # Combining Devanagari Dig..Combining Devanagari Sig
+    (0xa926, 0xa92d,),  # Kayah Li Vowel Ue       ..Kayah Li Tone Calya Plop
+    (0xa947, 0xa951,),  # Rejang Vowel Sign I     ..Rejang Consonant Sign R
+    (0xa980, 0xa982,),  # Javanese Sign Panyangga ..Javanese Sign Layar
+    (0xa9b3, 0xa9b3,),  # Javanese Sign Cecak Telu..Javanese Sign Cecak Telu
+    (0xa9b6, 0xa9b9,),  # Javanese Vowel Sign Wulu..Javanese Vowel Sign Suku
+    (0xa9bc, 0xa9bc,),  # Javanese Vowel Sign Pepe..Javanese Vowel Sign Pepe
+    (0xa9e5, 0xa9e5,),  # Myanmar Sign Shan Saw   ..Myanmar Sign Shan Saw
+    (0xaa29, 0xaa2e,),  # Cham Vowel Sign Aa      ..Cham Vowel Sign Oe
+    (0xaa31, 0xaa32,),  # Cham Vowel Sign Au      ..Cham Vowel Sign Ue
+    (0xaa35, 0xaa36,),  # Cham Consonant Sign La  ..Cham Consonant Sign Wa
+    (0xaa43, 0xaa43,),  # Cham Consonant Sign Fina..Cham Consonant Sign Fina
+    (0xaa4c, 0xaa4c,),  # Cham Consonant Sign Fina..Cham Consonant Sign Fina
+    (0xaa7c, 0xaa7c,),  # Myanmar Sign Tai Laing T..Myanmar Sign Tai Laing T
+    (0xaab0, 0xaab0,),  # Tai Viet Mai Kang       ..Tai Viet Mai Kang
+    (0xaab2, 0xaab4,),  # Tai Viet Vowel I        ..Tai Viet Vowel U
+    (0xaab7, 0xaab8,),  # Tai Viet Mai Khit       ..Tai Viet Vowel Ia
+    (0xaabe, 0xaabf,),  # Tai Viet Vowel Am       ..Tai Viet Tone Mai Ek
+    (0xaac1, 0xaac1,),  # Tai Viet Tone Mai Tho   ..Tai Viet Tone Mai Tho
+    (0xaaec, 0xaaed,),  # Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
+    (0xaaf6, 0xaaf6,),  # Meetei Mayek Virama     ..Meetei Mayek Virama
+    (0xabe5, 0xabe5,),  # Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
+    (0xabe8, 0xabe8,),  # Meetei Mayek Vowel Sign ..Meetei Mayek Vowel Sign
+    (0xabed, 0xabed,),  # Meetei Mayek Apun Iyek  ..Meetei Mayek Apun Iyek
+    (0xfb1e, 0xfb1e,),  # Hebrew Point Judeo-spani..Hebrew Point Judeo-spani
+    (0xfe00, 0xfe0f,),  # Variation Selector-1    ..Variation Selector-16
+    (0xfe20, 0xfe2f,),  # Combining Ligature Left ..Combining Cyrillic Titlo
+    (0x101fd, 0x101fd,),  # Phaistos Disc Sign Combi..Phaistos Disc Sign Combi
+    (0x102e0, 0x102e0,),  # Coptic Epact Thousands M..Coptic Epact Thousands M
+    (0x10376, 0x1037a,),  # Combining Old Permic Let..Combining Old Permic Let
+    (0x10a01, 0x10a03,),  # Kharoshthi Vowel Sign I ..Kharoshthi Vowel Sign Vo
+    (0x10a05, 0x10a06,),  # Kharoshthi Vowel Sign E ..Kharoshthi Vowel Sign O
+    (0x10a0c, 0x10a0f,),  # Kharoshthi Vowel Length ..Kharoshthi Sign Visarga
+    (0x10a38, 0x10a3a,),  # Kharoshthi Sign Bar Abov..Kharoshthi Sign Dot Belo
+    (0x10a3f, 0x10a3f,),  # Kharoshthi Virama       ..Kharoshthi Virama
+    (0x10ae5, 0x10ae6,),  # Manichaean Abbreviation ..Manichaean Abbreviation
+    (0x11001, 0x11001,),  # Brahmi Sign Anusvara    ..Brahmi Sign Anusvara
+    (0x11038, 0x11046,),  # Brahmi Vowel Sign Aa    ..Brahmi Virama
+    (0x1107f, 0x11081,),  # Brahmi Number Joiner    ..Kaithi Sign Anusvara
+    (0x110b3, 0x110b6,),  # Kaithi Vowel Sign U     ..Kaithi Vowel Sign Ai
+    (0x110b9, 0x110ba,),  # Kaithi Sign Virama      ..Kaithi Sign Nukta
+    (0x11100, 0x11102,),  # Chakma Sign Candrabindu ..Chakma Sign Visarga
+    (0x11127, 0x1112b,),  # Chakma Vowel Sign A     ..Chakma Vowel Sign Uu
+    (0x1112d, 0x11134,),  # Chakma Vowel Sign Ai    ..Chakma Maayyaa
+    (0x11173, 0x11173,),  # Mahajani Sign Nukta     ..Mahajani Sign Nukta
+    (0x11180, 0x11181,),  # Sharada Sign Candrabindu..Sharada Sign Anusvara
+    (0x111b6, 0x111be,),  # Sharada Vowel Sign U    ..Sharada Vowel Sign O
+    (0x111ca, 0x111cc,),  # Sharada Sign Nukta      ..Sharada Extra Short Vowe
+    (0x1122f, 0x11231,),  # Khojki Vowel Sign U     ..Khojki Vowel Sign Ai
+    (0x11234, 0x11234,),  # Khojki Sign Anusvara    ..Khojki Sign Anusvara
+    (0x11236, 0x11237,),  # Khojki Sign Nukta       ..Khojki Sign Shadda
+    (0x1123e, 0x1123e,),  # (nil)                   ..
+    (0x112df, 0x112df,),  # Khudawadi Sign Anusvara ..Khudawadi Sign Anusvara
+    (0x112e3, 0x112ea,),  # Khudawadi Vowel Sign U  ..Khudawadi Sign Virama
+    (0x11300, 0x11301,),  # Grantha Sign Combining A..Grantha Sign Candrabindu
+    (0x1133c, 0x1133c,),  # Grantha Sign Nukta      ..Grantha Sign Nukta
+    (0x11340, 0x11340,),  # Grantha Vowel Sign Ii   ..Grantha Vowel Sign Ii
+    (0x11366, 0x1136c,),  # Combining Grantha Digit ..Combining Grantha Digit
+    (0x11370, 0x11374,),  # Combining Grantha Letter..Combining Grantha Letter
+    (0x11438, 0x1143f,),  # (nil)                   ..
+    (0x11442, 0x11444,),  # (nil)                   ..
+    (0x11446, 0x11446,),  # (nil)                   ..
+    (0x114b3, 0x114b8,),  # Tirhuta Vowel Sign U    ..Tirhuta Vowel Sign Vocal
+    (0x114ba, 0x114ba,),  # Tirhuta Vowel Sign Short..Tirhuta Vowel Sign Short
+    (0x114bf, 0x114c0,),  # Tirhuta Sign Candrabindu..Tirhuta Sign Anusvara
+    (0x114c2, 0x114c3,),  # Tirhuta Sign Virama     ..Tirhuta Sign Nukta
+    (0x115b2, 0x115b5,),  # Siddham Vowel Sign U    ..Siddham Vowel Sign Vocal
+    (0x115bc, 0x115bd,),  # Siddham Sign Candrabindu..Siddham Sign Anusvara
+    (0x115bf, 0x115c0,),  # Siddham Sign Virama     ..Siddham Sign Nukta
+    (0x115dc, 0x115dd,),  # Siddham Vowel Sign Alter..Siddham Vowel Sign Alter
+    (0x11633, 0x1163a,),  # Modi Vowel Sign U       ..Modi Vowel Sign Ai
+    (0x1163d, 0x1163d,),  # Modi Sign Anusvara      ..Modi Sign Anusvara
+    (0x1163f, 0x11640,),  # Modi Sign Virama        ..Modi Sign Ardhacandra
+    (0x116ab, 0x116ab,),  # Takri Sign Anusvara     ..Takri Sign Anusvara
+    (0x116ad, 0x116ad,),  # Takri Vowel Sign Aa     ..Takri Vowel Sign Aa
+    (0x116b0, 0x116b5,),  # Takri Vowel Sign U      ..Takri Vowel Sign Au
+    (0x116b7, 0x116b7,),  # Takri Sign Nukta        ..Takri Sign Nukta
+    (0x1171d, 0x1171f,),  # Ahom Consonant Sign Medi..Ahom Consonant Sign Medi
+    (0x11722, 0x11725,),  # Ahom Vowel Sign I       ..Ahom Vowel Sign Uu
+    (0x11727, 0x1172b,),  # Ahom Vowel Sign Aw      ..Ahom Sign Killer
+    (0x11c30, 0x11c36,),  # (nil)                   ..
+    (0x11c38, 0x11c3d,),  # (nil)                   ..
+    (0x11c3f, 0x11c3f,),  # (nil)                   ..
+    (0x11c92, 0x11ca7,),  # (nil)                   ..
+    (0x11caa, 0x11cb0,),  # (nil)                   ..
+    (0x11cb2, 0x11cb3,),  # (nil)                   ..
+    (0x11cb5, 0x11cb6,),  # (nil)                   ..
+    (0x16af0, 0x16af4,),  # Bassa Vah Combining High..Bassa Vah Combining High
+    (0x16b30, 0x16b36,),  # Pahawh Hmong Mark Cim Tu..Pahawh Hmong Mark Cim Ta
+    (0x16f8f, 0x16f92,),  # Miao Tone Right         ..Miao Tone Below
+    (0x1bc9d, 0x1bc9e,),  # Duployan Thick Letter Se..Duployan Double Mark
+    (0x1d167, 0x1d169,),  # Musical Symbol Combining..Musical Symbol Combining
+    (0x1d17b, 0x1d182,),  # Musical Symbol Combining..Musical Symbol Combining
+    (0x1d185, 0x1d18b,),  # Musical Symbol Combining..Musical Symbol Combining
+    (0x1d1aa, 0x1d1ad,),  # Musical Symbol Combining..Musical Symbol Combining
+    (0x1d242, 0x1d244,),  # Combining Greek Musical ..Combining Greek Musical
+    (0x1da00, 0x1da36,),  # Signwriting Head Rim    ..Signwriting Air Sucking
+    (0x1da3b, 0x1da6c,),  # Signwriting Mouth Closed..Signwriting Excitement
+    (0x1da75, 0x1da75,),  # Signwriting Upper Body T..Signwriting Upper Body T
+    (0x1da84, 0x1da84,),  # Signwriting Location Hea..Signwriting Location Hea
+    (0x1da9b, 0x1da9f,),  # Signwriting Fill Modifie..Signwriting Fill Modifie
+    (0x1daa1, 0x1daaf,),  # Signwriting Rotation Mod..Signwriting Rotation Mod
+    (0x1e000, 0x1e006,),  # (nil)                   ..
+    (0x1e008, 0x1e018,),  # (nil)                   ..
+    (0x1e01b, 0x1e021,),  # (nil)                   ..
+    (0x1e023, 0x1e024,),  # (nil)                   ..
+    (0x1e026, 0x1e02a,),  # (nil)                   ..
+    (0x1e8d0, 0x1e8d6,),  # Mende Kikakui Combining ..Mende Kikakui Combining
+    (0x1e944, 0x1e94a,),  # (nil)                   ..
+    (0xe0100, 0xe01ef,),  # Variation Selector-17   ..Variation Selector-256
+)
diff --git a/libs/wcwidth/tests/__init__.py b/libs/wcwidth/tests/__init__.py
new file mode 100644
index 000000000..381300347
--- /dev/null
+++ b/libs/wcwidth/tests/__init__.py
@@ -0,0 +1 @@
+"""This file intentionally left blank."""
diff --git a/libs/wcwidth/tests/test_core.py b/libs/wcwidth/tests/test_core.py
new file mode 100644
index 000000000..13e2505a9
--- /dev/null
+++ b/libs/wcwidth/tests/test_core.py
@@ -0,0 +1,138 @@
+# coding: utf-8
+"""Core tests module for wcwidth."""
+import wcwidth
+
+
+def test_hello_jp():
+    u"""
+    Width of Japanese phrase: コンニチハ, セカイ!
+
+    Given a phrase of 5 and 3 Katakana ideographs, joined with
+    3 English-ASCII punctuation characters, totaling 11, this
+    phrase consumes 19 cells of a terminal emulator.
+    """
+    # given,
+    phrase = u'コンニチハ, セカイ!'
+    expect_length_each = (2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 1)
+    expect_length_phrase = sum(expect_length_each)
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase)
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_wcswidth_substr():
+    """
+    Test wcswidth() optional 2nd parameter, ``n``.
+
+    ``n`` determines at which position of the string
+    to stop counting length.
+    """
+    # given,
+    phrase = u'コンニチハ, セカイ!'
+    end = 7
+    expect_length_each = (2, 2, 2, 2, 2, 1, 1,)
+    expect_length_phrase = sum(expect_length_each)
+
+    # exercise,
+    length_phrase = wcwidth.wcswidth(phrase, end)
+
+    # verify,
+    assert length_phrase == expect_length_phrase
+
+
+def test_null_width_0():
+    """NULL (0) reports width 0."""
+    # given,
+    phrase = u'abc\x00def'
+    expect_length_each = (1, 1, 1, 0, 1, 1, 1)
+    expect_length_phrase = sum(expect_length_each)
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_control_c0_width_negative_1():
+    """CSI (Control sequence initiate) reports width -1."""
+    # given,
+    phrase = u'\x1b[0m'
+    expect_length_each = (-1, 1, 1, 1)
+    expect_length_phrase = -1
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_combining_width_negative_1():
+    """Simple test combining reports total width of 4."""
+    # given,
+    phrase = u'--\u05bf--'
+    expect_length_each = (1, 1, 0, 1, 1)
+    expect_length_phrase = 4
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_combining_cafe():
+    u"""Phrase cafe + COMBINING ACUTE ACCENT is café of length 4."""
+    phrase = u"cafe\u0301"
+    expect_length_each = (1, 1, 1, 1, 0)
+    expect_length_phrase = 4
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_combining_enclosing():
+    u"""CYRILLIC CAPITAL LETTER A + COMBINING CYRILLIC HUNDRED THOUSANDS SIGN is А҈ of length 1."""
+    phrase = u"\u0410\u0488"
+    expect_length_each = (1, 0)
+    expect_length_phrase = 1
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
+
+
+def test_combining_spacing():
+    u"""Balinese kapal (ship) is ᬓᬨᬮ᭄ of length 4."""
+    phrase = u"\u1B13\u1B28\u1B2E\u1B44"
+    expect_length_each = (1, 1, 1, 1)
+    expect_length_phrase = 4
+
+    # exercise,
+    length_each = tuple(map(wcwidth.wcwidth, phrase))
+    length_phrase = wcwidth.wcswidth(phrase, len(phrase))
+
+    # verify,
+    assert length_each == expect_length_each
+    assert length_phrase == expect_length_phrase
diff --git a/libs/wcwidth/wcwidth.py b/libs/wcwidth/wcwidth.py
new file mode 100644
index 000000000..a5754c846
--- /dev/null
+++ b/libs/wcwidth/wcwidth.py
@@ -0,0 +1,207 @@
+"""
+This is an implementation of wcwidth() and wcswidth().
+
+Defined in IEEE Std 1002.1-2001.
+
+https://github.com/jquast/wcwidth
+
+from Markus Kuhn's C code at:
+
+    http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+
+This is an implementation of wcwidth() and wcswidth() (defined in
+IEEE Std 1002.1-2001) for Unicode.
+
+http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
+http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
+
+In fixed-width output devices, Latin characters all occupy a single
+"cell" position of equal width, whereas ideographic CJK characters
+occupy two such cells. Interoperability between terminal-line
+applications and (teletype-style) character terminals using the
+UTF-8 encoding requires agreement on which character should advance
+the cursor by how many cell positions. No established formal
+standards exist at present on which Unicode character shall occupy
+how many cell positions on character terminals. These routines are
+a first attempt of defining such behavior based on simple rules
+applied to data provided by the Unicode Consortium.
+
+For some graphical characters, the Unicode standard explicitly
+defines a character-cell width via the definition of the East Asian
+FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
+In all these cases, there is no ambiguity about which width a
+terminal shall use. For characters in the East Asian Ambiguous (A)
+class, the width choice depends purely on a preference of backward
+compatibility with either historic CJK or Western practice.
+Choosing single-width for these characters is easy to justify as
+the appropriate long-term solution, as the CJK practice of
+displaying these characters as double-width comes from historic
+implementation simplicity (8-bit encoded characters were displayed
+single-width and 16-bit ones double-width, even for Greek,
+Cyrillic, etc.) and not any typographic considerations.
+
+Much less clear is the choice of width for the Not East Asian
+(Neutral) class. Existing practice does not dictate a width for any
+of these characters. It would nevertheless make sense
+typographically to allocate two character cells to characters such
+as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
+represented adequately with a single-width glyph. The following
+routines at present merely assign a single-cell width to all
+neutral characters, in the interest of simplicity. This is not
+entirely satisfactory and should be reconsidered before
+establishing a formal standard in this area. At the moment, the
+decision which Not East Asian (Neutral) characters should be
+represented by double-width glyphs cannot yet be answered by
+applying a simple rule from the Unicode database content. Setting
+up a proper standard for the behavior of UTF-8 character terminals
+will require a careful analysis not only of each Unicode character,
+but also of each presentation form, something the author of these
+routines has avoided to do so far.
+
+http://www.unicode.org/unicode/reports/tr11/
+
+Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+
+Permission to use, copy, modify, and distribute this software
+for any purpose and without fee is hereby granted. The author
+disclaims all warranties with regard to this software.
+
+Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+"""
+
+from __future__ import division
+from .table_wide import WIDE_EASTASIAN
+from .table_zero import ZERO_WIDTH
+
+
+def _bisearch(ucs, table):
+    """
+    Auxiliary function for binary search in interval table.
+
+    :arg int ucs: Ordinal value of unicode character.
+    :arg list table: List of starting and ending ranges of ordinal values,
+        in form of ``[(start, end), ...]``.
+    :rtype: int
+    :returns: 1 if ordinal value ucs is found within lookup table, else 0.
+    """
+    lbound = 0
+    ubound = len(table) - 1
+
+    if ucs < table[0][0] or ucs > table[ubound][1]:
+        return 0
+    while ubound >= lbound:
+        mid = (lbound + ubound) // 2
+        if ucs > table[mid][1]:
+            lbound = mid + 1
+        elif ucs < table[mid][0]:
+            ubound = mid - 1
+        else:
+            return 1
+
+    return 0
+
+
+def wcwidth(wc):
+    r"""
+    Given one unicode character, return its printable length on a terminal.
+
+    The wcwidth() function returns 0 if the wc argument has no printable effect
+    on a terminal (such as NUL '\0'), -1 if wc is not printable, or has an
+    indeterminate effect on the terminal, such as a control character.
+    Otherwise, the number of column positions the character occupies on a
+    graphic terminal (1 or 2) is returned.
+
+    The following have a column width of -1:
+
+        - C0 control characters (U+001 through U+01F).
+
+        - C1 control characters and DEL (U+07F through U+0A0).
+
+    The following have a column width of 0:
+
+        - Non-spacing and enclosing combining characters (general
+          category code Mn or Me in the Unicode database).
+
+        - NULL (U+0000, 0).
+
+        - COMBINING GRAPHEME JOINER (U+034F).
+
+        - ZERO WIDTH SPACE (U+200B) through
+          RIGHT-TO-LEFT MARK (U+200F).
+
+        - LINE SEPERATOR (U+2028) and
+          PARAGRAPH SEPERATOR (U+2029).
+
+        - LEFT-TO-RIGHT EMBEDDING (U+202A) through
+          RIGHT-TO-LEFT OVERRIDE (U+202E).
+
+        - WORD JOINER (U+2060) through
+          INVISIBLE SEPARATOR (U+2063).
+
+    The following have a column width of 1:
+
+        - SOFT HYPHEN (U+00AD) has a column width of 1.
+
+        - All remaining characters (including all printable
+          ISO 8859-1 and WGL4 characters, Unicode control characters,
+          etc.) have a column width of 1.
+
+    The following have a column width of 2:
+
+        - Spacing characters in the East Asian Wide (W) or East Asian
+          Full-width (F) category as defined in Unicode Technical
+          Report #11 have a column width of 2.
+    """
+    # pylint: disable=C0103
+    #         Invalid argument name "wc"
+    ucs = ord(wc)
+
+    # NOTE: created by hand, there isn't anything identifiable other than
+    # general Cf category code to identify these, and some characters in Cf
+    # category code are of non-zero width.
+
+    # pylint: disable=too-many-boolean-expressions
+    #          Too many boolean expressions in if statement (7/5)
+    if (ucs == 0 or
+            ucs == 0x034F or
+            0x200B <= ucs <= 0x200F or
+            ucs == 0x2028 or
+            ucs == 0x2029 or
+            0x202A <= ucs <= 0x202E or
+            0x2060 <= ucs <= 0x2063):
+        return 0
+
+    # C0/C1 control characters
+    if ucs < 32 or 0x07F <= ucs < 0x0A0:
+        return -1
+
+    # combining characters with zero width
+    if _bisearch(ucs, ZERO_WIDTH):
+        return 0
+
+    return 1 + _bisearch(ucs, WIDE_EASTASIAN)
+
+
+def wcswidth(pwcs, n=None):
+    """
+    Given a unicode string, return its printable length on a terminal.
+
+    Return the width, in cells, necessary to display the first ``n``
+    characters of the unicode string ``pwcs``.  When ``n`` is None (default),
+    return the length of the entire string.
+
+    Returns ``-1`` if a non-printable character is encountered.
+    """
+    # pylint: disable=C0103
+    #         Invalid argument name "n"
+
+    end = len(pwcs) if n is None else n
+    idx = slice(0, end)
+    width = 0
+    for char in pwcs[idx]:
+        wcw = wcwidth(char)
+        if wcw < 0:
+            return -1
+        else:
+            width += wcw
+    return width