From bcf6193cd92accd6a3a5d365bfeebc995f4cd597 Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Tue, 31 May 2022 15:05:30 +0200
Subject: [PATCH] Measure widths of various unicode characters

---
 Cargo.toml                 |   3 +
 examples/measure_widths.rs | 375 +++++++++++++++++++++++++++++++++++++
 2 files changed, 378 insertions(+)
 create mode 100644 examples/measure_widths.rs

diff --git a/Cargo.toml b/Cargo.toml
index ecf6494..5b3afd6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,6 @@ crossterm = "0.23.2"
 unicode-linebreak = "0.1.2"
 unicode-segmentation = "1.9.0"
 unicode-width = "0.1.9"
+
+[dev-dependencies]
+unicode-blocks = "0.1.4"
diff --git a/examples/measure_widths.rs b/examples/measure_widths.rs
new file mode 100644
index 0000000..1a05d26
--- /dev/null
+++ b/examples/measure_widths.rs
@@ -0,0 +1,375 @@
+use std::io;
+
+use crossterm::cursor::MoveTo;
+use crossterm::execute;
+use crossterm::style::Print;
+use crossterm::terminal::{Clear, ClearType, EnterAlternateScreen, LeaveAlternateScreen};
+use unicode_blocks::UnicodeBlock;
+use unicode_width::UnicodeWidthChar;
+
+use unicode_blocks as ub;
+
+fn measure_width(c: char) {
+    if let Some(predicted_width) = c.width() {
+        execute!(
+            io::stdout(),
+            Clear(ClearType::CurrentLine),
+            MoveTo(0, 1),
+            Print(c),
+        )
+        .unwrap();
+        let actual_width: usize = crossterm::cursor::position().unwrap().0.into();
+        if predicted_width != actual_width {
+            eprintln!(
+                "{}: actual {actual_width}, expected {predicted_width}",
+                c as u32
+            );
+        }
+    }
+}
+
+fn measure_widths(block: UnicodeBlock) {
+    execute!(
+        io::stdout(),
+        Clear(ClearType::All),
+        MoveTo(0, 0),
+        Print(block.name()),
+        MoveTo(0, 1),
+    )
+    .unwrap();
+    for c in block.start()..=block.end() {
+        if let Some(c) = char::from_u32(c) {
+            measure_width(c);
+        } else {
+            eprintln!("{c}: error");
+        }
+    }
+}
+
+fn main() {
+    let mut stdout = io::stdout();
+    execute!(stdout, EnterAlternateScreen).unwrap();
+
+    measure_widths(ub::ADLAM);
+    measure_widths(ub::AEGEAN_NUMBERS);
+    measure_widths(ub::AHOM);
+    measure_widths(ub::ALCHEMICAL_SYMBOLS);
+    measure_widths(ub::ALPHABETIC_PRESENTATION_FORMS);
+    measure_widths(ub::ANATOLIAN_HIEROGLYPHS);
+    measure_widths(ub::ANCIENT_GREEK_MUSICAL_NOTATION);
+    measure_widths(ub::ANCIENT_GREEK_NUMBERS);
+    measure_widths(ub::ANCIENT_SYMBOLS);
+    measure_widths(ub::ARABIC);
+    measure_widths(ub::ARABIC_EXTENDED_A);
+    measure_widths(ub::ARABIC_EXTENDED_B);
+    measure_widths(ub::ARABIC_MATHEMATICAL_ALPHABETIC_SYMBOLS);
+    measure_widths(ub::ARABIC_PRESENTATION_FORMS_A);
+    measure_widths(ub::ARABIC_PRESENTATION_FORMS_B);
+    measure_widths(ub::ARABIC_SUPPLEMENT);
+    measure_widths(ub::ARMENIAN);
+    measure_widths(ub::ARROWS);
+    measure_widths(ub::AVESTAN);
+    measure_widths(ub::BALINESE);
+    measure_widths(ub::BAMUM);
+    measure_widths(ub::BAMUM_SUPPLEMENT);
+    measure_widths(ub::BASIC_LATIN);
+    measure_widths(ub::BASSA_VAH);
+    measure_widths(ub::BATAK);
+    measure_widths(ub::BENGALI);
+    measure_widths(ub::BHAIKSUKI);
+    measure_widths(ub::BLOCK_ELEMENTS);
+    measure_widths(ub::BOPOMOFO);
+    measure_widths(ub::BOPOMOFO_EXTENDED);
+    measure_widths(ub::BOX_DRAWING);
+    measure_widths(ub::BRAHMI);
+    measure_widths(ub::BRAILLE_PATTERNS);
+    measure_widths(ub::BUGINESE);
+    measure_widths(ub::BUHID);
+    measure_widths(ub::BYZANTINE_MUSICAL_SYMBOLS);
+    measure_widths(ub::CARIAN);
+    measure_widths(ub::CAUCASIAN_ALBANIAN);
+    measure_widths(ub::CHAKMA);
+    measure_widths(ub::CHAM);
+    measure_widths(ub::CHEROKEE);
+    measure_widths(ub::CHEROKEE_SUPPLEMENT);
+    measure_widths(ub::CHESS_SYMBOLS);
+    measure_widths(ub::CHORASMIAN);
+    measure_widths(ub::CJK_COMPATIBILITY);
+    measure_widths(ub::CJK_COMPATIBILITY_FORMS);
+    measure_widths(ub::CJK_COMPATIBILITY_IDEOGRAPHS);
+    measure_widths(ub::CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT);
+    measure_widths(ub::CJK_RADICALS_SUPPLEMENT);
+    measure_widths(ub::CJK_STROKES);
+    measure_widths(ub::CJK_SYMBOLS_AND_PUNCTUATION);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_E);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_F);
+    measure_widths(ub::CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G);
+    measure_widths(ub::COMBINING_DIACRITICAL_MARKS);
+    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_EXTENDED);
+    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_FOR_SYMBOLS);
+    measure_widths(ub::COMBINING_DIACRITICAL_MARKS_SUPPLEMENT);
+    measure_widths(ub::COMBINING_HALF_MARKS);
+    measure_widths(ub::COMMON_INDIC_NUMBER_FORMS);
+    measure_widths(ub::CONTROL_PICTURES);
+    measure_widths(ub::COPTIC);
+    measure_widths(ub::COPTIC_EPACT_NUMBERS);
+    measure_widths(ub::COUNTING_ROD_NUMERALS);
+    measure_widths(ub::CUNEIFORM);
+    measure_widths(ub::CUNEIFORM_NUMBERS_AND_PUNCTUATION);
+    measure_widths(ub::CURRENCY_SYMBOLS);
+    measure_widths(ub::CYPRIOT_SYLLABARY);
+    measure_widths(ub::CYPRO_MINOAN);
+    measure_widths(ub::CYRILLIC);
+    measure_widths(ub::CYRILLIC_EXTENDED_A);
+    measure_widths(ub::CYRILLIC_EXTENDED_B);
+    measure_widths(ub::CYRILLIC_EXTENDED_C);
+    measure_widths(ub::CYRILLIC_SUPPLEMENT);
+    measure_widths(ub::DESERET);
+    measure_widths(ub::DEVANAGARI);
+    measure_widths(ub::DEVANAGARI_EXTENDED);
+    measure_widths(ub::DINGBATS);
+    measure_widths(ub::DIVES_AKURU);
+    measure_widths(ub::DOGRA);
+    measure_widths(ub::DOMINO_TILES);
+    measure_widths(ub::DUPLOYAN);
+    measure_widths(ub::EARLY_DYNASTIC_CUNEIFORM);
+    measure_widths(ub::EGYPTIAN_HIEROGLYPHS);
+    measure_widths(ub::EGYPTIAN_HIEROGLYPH_FORMAT_CONTROLS);
+    measure_widths(ub::ELBASAN);
+    measure_widths(ub::ELYMAIC);
+    measure_widths(ub::EMOTICONS);
+    measure_widths(ub::ENCLOSED_ALPHANUMERICS);
+    measure_widths(ub::ENCLOSED_ALPHANUMERIC_SUPPLEMENT);
+    measure_widths(ub::ENCLOSED_CJK_LETTERS_AND_MONTHS);
+    measure_widths(ub::ENCLOSED_IDEOGRAPHIC_SUPPLEMENT);
+    measure_widths(ub::ETHIOPIC);
+    measure_widths(ub::ETHIOPIC_EXTENDED);
+    measure_widths(ub::ETHIOPIC_EXTENDED_A);
+    measure_widths(ub::ETHIOPIC_EXTENDED_B);
+    measure_widths(ub::ETHIOPIC_SUPPLEMENT);
+    measure_widths(ub::GENERAL_PUNCTUATION);
+    measure_widths(ub::GEOMETRIC_SHAPES);
+    measure_widths(ub::GEOMETRIC_SHAPES_EXTENDED);
+    measure_widths(ub::GEORGIAN);
+    measure_widths(ub::GEORGIAN_EXTENDED);
+    measure_widths(ub::GEORGIAN_SUPPLEMENT);
+    measure_widths(ub::GLAGOLITIC);
+    measure_widths(ub::GLAGOLITIC_SUPPLEMENT);
+    measure_widths(ub::GOTHIC);
+    measure_widths(ub::GRANTHA);
+    measure_widths(ub::GREEK_AND_COPTIC);
+    measure_widths(ub::GREEK_EXTENDED);
+    measure_widths(ub::GUJARATI);
+    measure_widths(ub::GUNJALA_GONDI);
+    measure_widths(ub::GURMUKHI);
+    measure_widths(ub::HALFWIDTH_AND_FULLWIDTH_FORMS);
+    measure_widths(ub::HANGUL_COMPATIBILITY_JAMO);
+    measure_widths(ub::HANGUL_JAMO);
+    measure_widths(ub::HANGUL_JAMO_EXTENDED_A);
+    measure_widths(ub::HANGUL_JAMO_EXTENDED_B);
+    measure_widths(ub::HANGUL_SYLLABLES);
+    measure_widths(ub::HANIFI_ROHINGYA);
+    measure_widths(ub::HANUNOO);
+    measure_widths(ub::HATRAN);
+    measure_widths(ub::HEBREW);
+    // measure_widths(ub::HIGH_PRIVATE_USE_SURROGATES);
+    // measure_widths(ub::HIGH_SURROGATES);
+    measure_widths(ub::HIRAGANA);
+    measure_widths(ub::IDEOGRAPHIC_DESCRIPTION_CHARACTERS);
+    measure_widths(ub::IDEOGRAPHIC_SYMBOLS_AND_PUNCTUATION);
+    measure_widths(ub::IMPERIAL_ARAMAIC);
+    measure_widths(ub::INDIC_SIYAQ_NUMBERS);
+    measure_widths(ub::INSCRIPTIONAL_PAHLAVI);
+    measure_widths(ub::INSCRIPTIONAL_PARTHIAN);
+    measure_widths(ub::IPA_EXTENSIONS);
+    measure_widths(ub::JAVANESE);
+    measure_widths(ub::KAITHI);
+    measure_widths(ub::KANA_EXTENDED_A);
+    measure_widths(ub::KANA_EXTENDED_B);
+    measure_widths(ub::KANA_SUPPLEMENT);
+    measure_widths(ub::KANBUN);
+    measure_widths(ub::KANGXI_RADICALS);
+    measure_widths(ub::KANNADA);
+    measure_widths(ub::KATAKANA);
+    measure_widths(ub::KATAKANA_PHONETIC_EXTENSIONS);
+    measure_widths(ub::KAYAH_LI);
+    measure_widths(ub::KHAROSHTHI);
+    measure_widths(ub::KHITAN_SMALL_SCRIPT);
+    measure_widths(ub::KHMER);
+    measure_widths(ub::KHMER_SYMBOLS);
+    measure_widths(ub::KHOJKI);
+    measure_widths(ub::KHUDAWADI);
+    measure_widths(ub::LAO);
+    measure_widths(ub::LATIN_1_SUPPLEMENT);
+    measure_widths(ub::LATIN_EXTENDED_A);
+    measure_widths(ub::LATIN_EXTENDED_ADDITIONAL);
+    measure_widths(ub::LATIN_EXTENDED_B);
+    measure_widths(ub::LATIN_EXTENDED_C);
+    measure_widths(ub::LATIN_EXTENDED_D);
+    measure_widths(ub::LATIN_EXTENDED_E);
+    measure_widths(ub::LATIN_EXTENDED_F);
+    measure_widths(ub::LATIN_EXTENDED_G);
+    measure_widths(ub::LEPCHA);
+    measure_widths(ub::LETTERLIKE_SYMBOLS);
+    measure_widths(ub::LIMBU);
+    measure_widths(ub::LINEAR_A);
+    measure_widths(ub::LINEAR_B_IDEOGRAMS);
+    measure_widths(ub::LINEAR_B_SYLLABARY);
+    measure_widths(ub::LISU);
+    measure_widths(ub::LISU_SUPPLEMENT);
+    // measure_widths(ub::LOW_SURROGATES);
+    measure_widths(ub::LYCIAN);
+    measure_widths(ub::LYDIAN);
+    measure_widths(ub::MAHAJANI);
+    measure_widths(ub::MAHJONG_TILES);
+    measure_widths(ub::MAKASAR);
+    measure_widths(ub::MALAYALAM);
+    measure_widths(ub::MANDAIC);
+    measure_widths(ub::MANICHAEAN);
+    measure_widths(ub::MARCHEN);
+    measure_widths(ub::MASARAM_GONDI);
+    measure_widths(ub::MATHEMATICAL_ALPHANUMERIC_SYMBOLS);
+    measure_widths(ub::MATHEMATICAL_OPERATORS);
+    measure_widths(ub::MAYAN_NUMERALS);
+    measure_widths(ub::MEDEFAIDRIN);
+    measure_widths(ub::MEETEI_MAYEK);
+    measure_widths(ub::MEETEI_MAYEK_EXTENSIONS);
+    measure_widths(ub::MENDE_KIKAKUI);
+    measure_widths(ub::MEROITIC_CURSIVE);
+    measure_widths(ub::MEROITIC_HIEROGLYPHS);
+    measure_widths(ub::MIAO);
+    measure_widths(ub::MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A);
+    measure_widths(ub::MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B);
+    measure_widths(ub::MISCELLANEOUS_SYMBOLS);
+    measure_widths(ub::MISCELLANEOUS_SYMBOLS_AND_ARROWS);
+    measure_widths(ub::MISCELLANEOUS_SYMBOLS_AND_PICTOGRAPHS);
+    measure_widths(ub::MISCELLANEOUS_TECHNICAL);
+    measure_widths(ub::MODI);
+    measure_widths(ub::MODIFIER_TONE_LETTERS);
+    measure_widths(ub::MONGOLIAN);
+    measure_widths(ub::MONGOLIAN_SUPPLEMENT);
+    measure_widths(ub::MRO);
+    measure_widths(ub::MULTANI);
+    measure_widths(ub::MUSICAL_SYMBOLS);
+    measure_widths(ub::MYANMAR);
+    measure_widths(ub::MYANMAR_EXTENDED_A);
+    measure_widths(ub::MYANMAR_EXTENDED_B);
+    measure_widths(ub::NABATAEAN);
+    measure_widths(ub::NANDINAGARI);
+    measure_widths(ub::NEWA);
+    measure_widths(ub::NEW_TAI_LUE);
+    measure_widths(ub::NKO);
+    measure_widths(ub::NUMBER_FORMS);
+    measure_widths(ub::NUSHU);
+    measure_widths(ub::NYIAKENG_PUACHUE_HMONG);
+    measure_widths(ub::OGHAM);
+    measure_widths(ub::OLD_HUNGARIAN);
+    measure_widths(ub::OLD_ITALIC);
+    measure_widths(ub::OLD_NORTH_ARABIAN);
+    measure_widths(ub::OLD_PERMIC);
+    measure_widths(ub::OLD_PERSIAN);
+    measure_widths(ub::OLD_SOGDIAN);
+    measure_widths(ub::OLD_SOUTH_ARABIAN);
+    measure_widths(ub::OLD_TURKIC);
+    measure_widths(ub::OLD_UYGHUR);
+    measure_widths(ub::OL_CHIKI);
+    measure_widths(ub::OPTICAL_CHARACTER_RECOGNITION);
+    measure_widths(ub::ORIYA);
+    measure_widths(ub::ORNAMENTAL_DINGBATS);
+    measure_widths(ub::OSAGE);
+    measure_widths(ub::OSMANYA);
+    measure_widths(ub::OTTOMAN_SIYAQ_NUMBERS);
+    measure_widths(ub::PAHAWH_HMONG);
+    measure_widths(ub::PALMYRENE);
+    measure_widths(ub::PAU_CIN_HAU);
+    measure_widths(ub::PHAGS_PA);
+    measure_widths(ub::PHAISTOS_DISC);
+    measure_widths(ub::PHOENICIAN);
+    measure_widths(ub::PHONETIC_EXTENSIONS);
+    measure_widths(ub::PHONETIC_EXTENSIONS_SUPPLEMENT);
+    measure_widths(ub::PLAYING_CARDS);
+    measure_widths(ub::PRIVATE_USE_AREA);
+    measure_widths(ub::PSALTER_PAHLAVI);
+    measure_widths(ub::REJANG);
+    measure_widths(ub::RUMI_NUMERAL_SYMBOLS);
+    measure_widths(ub::RUNIC);
+    measure_widths(ub::SAMARITAN);
+    measure_widths(ub::SAURASHTRA);
+    measure_widths(ub::SHARADA);
+    measure_widths(ub::SHAVIAN);
+    measure_widths(ub::SHORTHAND_FORMAT_CONTROLS);
+    measure_widths(ub::SIDDHAM);
+    measure_widths(ub::SINHALA);
+    measure_widths(ub::SINHALA_ARCHAIC_NUMBERS);
+    measure_widths(ub::SMALL_FORM_VARIANTS);
+    measure_widths(ub::SMALL_KANA_EXTENSION);
+    measure_widths(ub::SOGDIAN);
+    measure_widths(ub::SORA_SOMPENG);
+    measure_widths(ub::SOYOMBO);
+    measure_widths(ub::SPACING_MODIFIER_LETTERS);
+    measure_widths(ub::SPECIALS);
+    measure_widths(ub::SUNDANESE);
+    measure_widths(ub::SUNDANESE_SUPPLEMENT);
+    measure_widths(ub::SUPERSCRIPTS_AND_SUBSCRIPTS);
+    measure_widths(ub::SUPPLEMENTAL_ARROWS_A);
+    measure_widths(ub::SUPPLEMENTAL_ARROWS_B);
+    measure_widths(ub::SUPPLEMENTAL_ARROWS_C);
+    measure_widths(ub::SUPPLEMENTAL_MATHEMATICAL_OPERATORS);
+    measure_widths(ub::SUPPLEMENTAL_PUNCTUATION);
+    measure_widths(ub::SUPPLEMENTAL_SYMBOLS_AND_PICTOGRAPHS);
+    measure_widths(ub::SUPPLEMENTARY_PRIVATE_USE_AREA_A);
+    measure_widths(ub::SUPPLEMENTARY_PRIVATE_USE_AREA_B);
+    measure_widths(ub::SUTTON_SIGNWRITING);
+    measure_widths(ub::SYLOTI_NAGRI);
+    measure_widths(ub::SYMBOLS_AND_PICTOGRAPHS_EXTENDED_A);
+    measure_widths(ub::SYMBOLS_FOR_LEGACY_COMPUTING);
+    measure_widths(ub::SYRIAC);
+    measure_widths(ub::SYRIAC_SUPPLEMENT);
+    measure_widths(ub::TAGALOG);
+    measure_widths(ub::TAGBANWA);
+    measure_widths(ub::TAGS);
+    measure_widths(ub::TAI_LE);
+    measure_widths(ub::TAI_THAM);
+    measure_widths(ub::TAI_VIET);
+    measure_widths(ub::TAI_XUAN_JING_SYMBOLS);
+    measure_widths(ub::TAKRI);
+    measure_widths(ub::TAMIL);
+    measure_widths(ub::TAMIL_SUPPLEMENT);
+    measure_widths(ub::TANGSA);
+    measure_widths(ub::TANGUT);
+    measure_widths(ub::TANGUT_COMPONENTS);
+    measure_widths(ub::TANGUT_SUPPLEMENT);
+    measure_widths(ub::TELUGU);
+    measure_widths(ub::THAANA);
+    measure_widths(ub::THAI);
+    measure_widths(ub::TIBETAN);
+    measure_widths(ub::TIFINAGH);
+    measure_widths(ub::TIRHUTA);
+    measure_widths(ub::TOTO);
+    measure_widths(ub::TRANSPORT_AND_MAP_SYMBOLS);
+    measure_widths(ub::UGARITIC);
+    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS);
+    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED);
+    measure_widths(ub::UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED_A);
+    measure_widths(ub::VAI);
+    measure_widths(ub::VARIATION_SELECTORS);
+    measure_widths(ub::VARIATION_SELECTORS_SUPPLEMENT);
+    measure_widths(ub::VEDIC_EXTENSIONS);
+    measure_widths(ub::VERTICAL_FORMS);
+    measure_widths(ub::VITHKUQI);
+    measure_widths(ub::WANCHO);
+    measure_widths(ub::WARANG_CITI);
+    measure_widths(ub::YEZIDI);
+    measure_widths(ub::YIJING_HEXAGRAM_SYMBOLS);
+    measure_widths(ub::YI_RADICALS);
+    measure_widths(ub::YI_SYLLABLES);
+    measure_widths(ub::ZANABAZAR_SQUARE);
+    measure_widths(ub::ZNAMENNY_MUSICAL_NOTATION);
+
+    execute!(stdout, LeaveAlternateScreen).unwrap();
+}