package juloo.keyboard2; import android.view.KeyCharacterMap; import android.view.KeyEvent; import java.util.HashMap; class KeyModifier { /** Cache key is KeyValue's name */ private static HashMap> _cache = new HashMap>(); /** Modify a key according to modifiers. */ public static KeyValue modify(KeyValue k, Pointers.Modifiers mods) { if (k == null) return null; int n_mods = mods.size(); HashMap ks = cacheEntry(k); KeyValue r = ks.get(mods); if (r == null) { r = k; /* Order: Fn, Shift, accents */ for (int i = 0; i < n_mods; i++) r = modify(r, mods.get(i)); ks.put(mods, r); } /* Keys with an empty string are placeholder keys. */ return (r.getString().length() == 0) ? null : r; } public static KeyValue modify(KeyValue k, KeyValue.Modifier mod) { switch (mod) { case CTRL: case ALT: case META: return turn_into_keyevent(k); case FN: return apply_fn(k); case SHIFT: return apply_shift(k); case GRAVE: return apply_map_char(k, map_char_grave); case AIGU: return apply_map_char(k, map_char_aigu); case CIRCONFLEXE: return apply_map_char(k, map_char_circonflexe); case TILDE: return apply_map_char(k, map_char_tilde); case CEDILLE: return apply_map_char(k, map_char_cedille); case TREMA: return apply_map_char(k, map_char_trema); case CARON: return apply_map_char(k, map_char_caron); case RING: return apply_map_char(k, map_char_ring); case MACRON: return apply_map_char(k, map_char_macron); case OGONEK: return apply_map_char(k, map_char_ogonek); case DOT_ABOVE: return apply_map_char(k, map_char_dot_above); case BREVE: return apply_map_char(k, map_char_breve); case DOUBLE_AIGU: return apply_map_char(k, map_char_double_aigu); case ORDINAL: return apply_map_char(k, map_char_ordinal); case SUPERSCRIPT: return apply_map_char(k, map_char_superscript); case SUBSCRIPT: return apply_map_char(k, map_char_subscript); case ARROWS: return apply_map_char(k, map_char_arrows); case BOX: return apply_map_char(k, map_char_box); case SLASH: return apply_map_char(k, map_char_slash); case BAR: return apply_map_char(k, map_char_bar); case ARROW_RIGHT: return apply_map_char(k, map_char_arrow_right); case DOT_BELOW: return apply_map_char(k, map_char_dot_below); case HORN: return apply_map_char(k, map_char_horn); case HOOK_ABOVE: return apply_map_char(k, map_char_hook_above); default: return k; } } /** Modify a key after a long press. */ public static KeyValue modify_long_press(KeyValue k) { switch (k.getKind()) { case Event: switch (k.getEvent()) { case CHANGE_METHOD_PREV: return KeyValue.getKeyByName("change_method"); } break; } return k; } private static KeyValue apply_map_char(KeyValue k, Map_char map) { switch (k.getKind()) { case Char: char kc = k.getChar(); String modified = map.apply(kc); if (modified == null) return k; return KeyValue.makeStringKey(modified, k.getFlags()); default: return k; } } private static KeyValue apply_shift(KeyValue k) { switch (k.getKind()) { case Char: char kc = k.getChar(); char c = map_char_shift(kc); if (kc == c) c = Character.toUpperCase(kc); return (kc == c) ? k : k.withChar(c); case String: return KeyValue.makeStringKey(k.getString().toUpperCase(), k.getFlags()); default: return k; } } private static KeyValue apply_fn(KeyValue k) { String name = null; switch (k.getKind()) { case Char: name = apply_fn_char(k.getChar()); break; case Keyevent: name = apply_fn_keyevent(k.getKeyevent()); break; case Event: name = apply_fn_event(k.getEvent()); break; case Placeholder: name = apply_fn_placeholder(k.getPlaceholder()); break; } return (name == null) ? k : KeyValue.getKeyByName(name); } private static String apply_fn_keyevent(int code) { switch (code) { case KeyEvent.KEYCODE_DPAD_UP: return "page_up"; case KeyEvent.KEYCODE_DPAD_DOWN: return "page_down"; case KeyEvent.KEYCODE_DPAD_LEFT: return "home"; case KeyEvent.KEYCODE_DPAD_RIGHT: return "end"; case KeyEvent.KEYCODE_ESCAPE: return "insert"; case KeyEvent.KEYCODE_TAB: return "\\t"; default: return null; } } private static String apply_fn_event(KeyValue.Event ev) { switch (ev) { case SWITCH_NUMERIC: return "switch_greekmath"; default: return null; } } private static String apply_fn_placeholder(KeyValue.Placeholder p) { switch (p) { case F11: return "f11"; case F12: return "f12"; case SHINDOT: return "shindot"; case SINDOT: return "sindot"; case OLE: return "ole"; case METEG: return "meteg"; default: return null; } } /** Return the name of modified key, or [null]. */ private static String apply_fn_char(char c) { switch (c) { case '1': return "f1"; case '2': return "f2"; case '3': return "f3"; case '4': return "f4"; case '5': return "f5"; case '6': return "f6"; case '7': return "f7"; case '8': return "f8"; case '9': return "f9"; case '0': return "f10"; case '<': return "«"; case '>': return "»"; case '{': return "‹"; case '}': return "›"; case '[': return "‘"; case ']': return "’"; case '(': return "“"; case ')': return "”"; case '\'': return "‚"; case '"': return "„"; case '-': return "–"; case '_': return "—"; case '^': return "¬"; case '%': return "‰"; case '=': return "≈"; case 'u': return "µ"; case 'a': return "æ"; case 'o': return "œ"; case '*': return "°"; case '.': return "…"; case ',': return "·"; case '!': return "¡"; case '?': return "¿"; case '|': return "¦"; case '§': return "¶"; case '†': return "‡"; case '×': return "∙"; case ' ': return "nbsp"; // arrows case '↖': return "⇖"; case '↑': return "⇑"; case '↗': return "⇗"; case '←': return "⇐"; case '→': return "⇒"; case '↙': return "⇙"; case '↓': return "⇓"; case '↘': return "⇘"; case '↔': return "⇔"; case '↕': return "⇕"; // Currency symbols case 'e': return "€"; case 'l': return "£"; case 'r': return "₹"; case 'y': return "¥"; case 'c': return "¢"; case 'p': return "₱"; case 'h': return "₴"; case 'b': return "₿"; case '€': case '£': return "removed"; // Avoid showing these twice // alternating greek letters case 'π': return "ϖ"; case 'θ': return "ϑ"; case 'Θ': return "ϴ"; case 'ε': return "ϵ"; case 'β': return "ϐ"; case 'ρ': return "ϱ"; case 'σ': return "ς"; case 'γ': return "ɣ"; case 'φ': return "ϕ"; case 'υ': return "ϒ"; case 'κ': return "ϰ"; // alternating math characters case '∪': return "⋃"; case '∩': return "⋂"; case '∃': return "∄"; case '∈': return "∉"; case '∫': return "∮"; case 'Π': return "∏"; case 'Σ': return "∑"; case '∨': return "⋁"; case '∧': return "⋀"; case '⊷': return "⊶"; case '⊂': return "⊆"; case '⊃': return "⊇"; case '±': return "∓"; // hebrew niqqud case 'ק': return "qamats"; // kamatz case 'ר': return "hataf_qamats"; // reduced kamatz case 'ו': return "holam"; case 'ם': return "rafe"; case 'פ': return "patah"; // patach case 'ש': return "sheva"; case 'ד': return "dagesh"; // or mapiq case 'ח': return "hiriq"; case 'ף': return "hataf_patah"; // reduced patach case 'ז': return "qubuts"; // kubuts case 'ס': return "segol"; case 'ב': return "hataf_segol"; // reduced segol case 'צ': return "tsere"; // Devanagari symbols case 'ए': return "ऍ"; case 'े': return "ॅ"; case 'ऐ': return "ऎ"; case 'ै': return "ॆ"; case 'ऋ': return "ॠ"; case 'ृ': return "ॄ"; case 'ळ': return "ऴ"; case 'र': return "ऱ"; case 'क': return "क़"; case 'ख': return "ख़"; case 'ग': return "ग़"; case 'घ': return "ॻ"; case 'ढ': return "ढ़"; case 'न': return "ऩ"; case 'ड': return "ड़"; case 'ट': return "ॸ"; case 'ण': return "ॾ"; case 'फ': return "फ़"; case 'ऌ': return "ॡ"; case 'ॢ': return "ॣ"; case 'औ': return "ॵ"; case 'ौ': return "ॏ"; case 'ओ': return "ऒ"; case 'ो': return "ॊ"; case 'च': return "ॼ"; case 'ज': return "ज़"; case 'ब': return "ॿ"; case 'व': return "ॺ"; case 'य': return "य़"; case 'अ': return "ॲ"; case 'आ': return "ऑ"; case 'ा': return "ॉ"; case 'झ': return "ॹ"; case 'ई': return "ॴ"; case 'ी': return "ऻ"; case 'इ': return "ॳ"; case 'ि': return "ऺ"; case 'उ': return "ॶ"; case 'ऊ': return "ॷ"; case 'ु': return "ऄ"; case 'ष': return "क्ष"; case 'थ': return "त्र"; case 'द': return "द्र"; case 'प': return "प्र"; case 'श': return "श्र"; case 'छ': return "श्च"; case 'ँ': return "ऀ"; case '₹': return "₨"; case 'ॖ': return "ॗ"; case '॓': return "॔"; case '॰': return "ॱ"; case '।': return "॥"; case 'ं': return "ॕ"; case '़': return "ॎ"; case 'ऽ': return "ॽ"; // Persian numbers case '۱': return "f1"; case '۲': return "f2"; case '۳': return "f3"; case '۴': return "f4"; case '۵': return "f5"; case '۶': return "f6"; case '۷': return "f7"; case '۸': return "f8"; case '۹': return "f9"; case '۰': return "f10"; // Arabic numbers case '١': return "f1"; case '٢': return "f2"; case '٣': return "f3"; case '٤': return "f4"; case '٥': return "f5"; case '٦': return "f6"; case '٧': return "f7"; case '٨': return "f8"; case '٩': return "f9"; case '٠': return "f10"; default: return null; } } private static KeyValue turn_into_keyevent(KeyValue k) { if (k.getKind() != KeyValue.Kind.Char) return k; int e; switch (k.getChar()) { case 'a': e = KeyEvent.KEYCODE_A; break; case 'b': e = KeyEvent.KEYCODE_B; break; case 'c': e = KeyEvent.KEYCODE_C; break; case 'd': e = KeyEvent.KEYCODE_D; break; case 'e': e = KeyEvent.KEYCODE_E; break; case 'f': e = KeyEvent.KEYCODE_F; break; case 'g': e = KeyEvent.KEYCODE_G; break; case 'h': e = KeyEvent.KEYCODE_H; break; case 'i': e = KeyEvent.KEYCODE_I; break; case 'j': e = KeyEvent.KEYCODE_J; break; case 'k': e = KeyEvent.KEYCODE_K; break; case 'l': e = KeyEvent.KEYCODE_L; break; case 'm': e = KeyEvent.KEYCODE_M; break; case 'n': e = KeyEvent.KEYCODE_N; break; case 'o': e = KeyEvent.KEYCODE_O; break; case 'p': e = KeyEvent.KEYCODE_P; break; case 'q': e = KeyEvent.KEYCODE_Q; break; case 'r': e = KeyEvent.KEYCODE_R; break; case 's': e = KeyEvent.KEYCODE_S; break; case 't': e = KeyEvent.KEYCODE_T; break; case 'u': e = KeyEvent.KEYCODE_U; break; case 'v': e = KeyEvent.KEYCODE_V; break; case 'w': e = KeyEvent.KEYCODE_W; break; case 'x': e = KeyEvent.KEYCODE_X; break; case 'y': e = KeyEvent.KEYCODE_Y; break; case 'z': e = KeyEvent.KEYCODE_Z; break; case '0': e = KeyEvent.KEYCODE_0; break; case '1': e = KeyEvent.KEYCODE_1; break; case '2': e = KeyEvent.KEYCODE_2; break; case '3': e = KeyEvent.KEYCODE_3; break; case '4': e = KeyEvent.KEYCODE_4; break; case '5': e = KeyEvent.KEYCODE_5; break; case '6': e = KeyEvent.KEYCODE_6; break; case '7': e = KeyEvent.KEYCODE_7; break; case '8': e = KeyEvent.KEYCODE_8; break; case '9': e = KeyEvent.KEYCODE_9; break; case '`': e = KeyEvent.KEYCODE_GRAVE; break; case '-': e = KeyEvent.KEYCODE_MINUS; break; case '=': e = KeyEvent.KEYCODE_EQUALS; break; case '[': e = KeyEvent.KEYCODE_LEFT_BRACKET; break; case ']': e = KeyEvent.KEYCODE_RIGHT_BRACKET; break; case '\\': e = KeyEvent.KEYCODE_BACKSLASH; break; case ';': e = KeyEvent.KEYCODE_SEMICOLON; break; case '\'': e = KeyEvent.KEYCODE_APOSTROPHE; break; case '/': e = KeyEvent.KEYCODE_SLASH; break; case '@': e = KeyEvent.KEYCODE_AT; break; case '+': e = KeyEvent.KEYCODE_PLUS; break; case ',': e = KeyEvent.KEYCODE_COMMA; break; case '.': e = KeyEvent.KEYCODE_PERIOD; break; case '*': e = KeyEvent.KEYCODE_STAR; break; case '#': e = KeyEvent.KEYCODE_POUND; break; case '(': e = KeyEvent.KEYCODE_NUMPAD_LEFT_PAREN; break; case ')': e = KeyEvent.KEYCODE_NUMPAD_RIGHT_PAREN; break; case ' ': e = KeyEvent.KEYCODE_SPACE; break; default: return k; } return k.withKeyevent(e); } /* Lookup the cache entry for a key. Create it needed. */ private static HashMap cacheEntry(KeyValue k) { HashMap ks = _cache.get(k); if (ks == null) { ks = new HashMap(); _cache.put(k, ks); } return ks; } private static abstract class Map_char { /** Modify a char or return [null] if the modifier do not apply. Return a [String] that can contains combining diacritics. */ public abstract String apply(char c); } private static char map_char_shift(char c) { switch (c) { case '↙': return '⇙'; case '↓': return '⇓'; case '↘': return '⇘'; case '←': return '⇐'; case '→': return '⇒'; case '↖': return '⇖'; case '↑': return '⇑'; case '↗': return '⇗'; case '└': return '╚'; case '┴': return '╩'; case '┘': return '╝'; case '├': return '╠'; case '┼': return '╬'; case '┤': return '╣'; case '┌': return '╔'; case '┬': return '╦'; case '┐': return '╗'; case '─': return '═'; case '│': return '║'; case 'ß': return 'ẞ'; /* In Turkish, upper case of 'iı' is 'İI' but Java's toUpperCase will return 'II'. To make 'İ' accessible, make it the shift of 'ı'. This has the inconvenient of swapping i and ı on the keyboard. */ case 'ı': return 'İ'; case '₹': return '₨'; default: return c; } } /** Return [null] if the dead char do not apply. */ private static String map_dead_char(char c, char dead_char) { char modified = (char)KeyCharacterMap.getDeadChar(dead_char, c); return (modified == 0 || modified == c) ? null : String.valueOf(modified); } private static final Map_char map_char_aigu = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "á"; case 'e': return "é"; case 'i': return "í"; case 'l': return "ĺ"; case 'o': return "ó"; case 'r': return "ŕ"; case 's': return "ś"; case 'u': return "ú"; case 'y': return "ý"; // Combining diacritic case 'j': return c + "\u0301"; default: return map_dead_char(c, '\u00B4'); } } }; private static final Map_char map_char_caron = new Map_char() { public String apply(char c) { switch (c) { case 'c': return "č"; case 'd': return "ď"; case 'e': return "ě"; case 'l': return "ľ"; case 'n': return "ň"; case 'r': return "ř"; case 's': return "š"; case 't': return "ť"; case 'z': return "ž"; default: return map_dead_char(c, '\u02C7'); } } }; private static final Map_char map_char_cedille = new Map_char() { public String apply(char c) { switch (c) { case 'c': return "ç"; case 's': return "ş"; case 'g': return "ģ"; default: return map_dead_char(c, '\u00B8'); } } }; private static final Map_char map_char_circonflexe = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "â"; case 'e': return "ê"; case 'i': return "î"; case 'o': return "ô"; case 'u': return "û"; default: return map_dead_char(c, '\u02C6'); } } }; private static final Map_char map_char_dot_above = new Map_char() { public String apply(char c) { switch (c) { case 'ė': return "ė"; default: return map_dead_char(c, '\u02D9'); } } }; private static final Map_char map_char_grave = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "à"; case 'e': return "è"; case 'i': return "ì"; case 'o': return "ò"; case 'u': return "ù"; default: return map_dead_char(c, '\u02CB'); } } }; private static final Map_char map_char_macron = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ā"; case 'e': return "ē"; case 'i': return "ī"; case 'u': return "ū"; default: return map_dead_char(c, '\u00AF'); } } }; private static final Map_char map_char_ogonek = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ą"; case 'e': return "ę"; case 'i': return "į"; case 'k': return "ķ"; case 'l': return "ļ"; case 'n': return "ņ"; case 'u': return "ų"; default: return map_dead_char(c, '\u02DB'); } } }; private static final Map_char map_char_ring = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "å"; case 'u': return "ů"; default: return map_dead_char(c, '\u02DA'); } } }; private static final Map_char map_char_tilde = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ã"; case 'o': return "õ"; case 'n': return "ñ"; default: return map_dead_char(c, '\u02DC'); } } }; private static final Map_char map_char_trema = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ä"; case 'e': return "ë"; case 'i': return "ï"; case 'o': return "ö"; case 'u': return "ü"; case 'y': return "ÿ"; default: return map_dead_char(c, '\u00A8'); } } }; private static final Map_char map_char_breve = new Map_char() { public String apply(char c) { switch (c) { default: return map_dead_char(c, '\u02D8'); } } }; private static final Map_char map_char_double_aigu = new Map_char() { public String apply(char c) { switch (c) { case 'o': return "ő"; case 'u': return "ű"; case ' ': return "˝"; // Combining diacritic case 'a': case 'e': case 'i': case 'm': case 'y': return c + "\u030b"; default: return null; } } }; private static final Map_char map_char_ordinal = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ª"; case 'o': return "º"; case '1': return "ª"; case '2': return "º"; case '3': return "ⁿ"; case '4': return "ᵈ"; case '5': return "ᵉ"; case '6': return "ʳ"; case '7': return "ˢ"; case '8': return "ᵗ"; case '9': return "ʰ"; case '*': return "°"; default: return null; } } }; private static final Map_char map_char_superscript = new Map_char() { public String apply(char c) { switch (c) { case '1': return "¹"; case '2': return "²"; case '3': return "³"; case '4': return "⁴"; case '5': return "⁵"; case '6': return "⁶"; case '7': return "⁷"; case '8': return "⁸"; case '9': return "⁹"; case '0': return "⁰"; case '+': return "⁺"; case '-': return "⁻"; case '=': return "⁼"; case '(': return "⁽"; case ')': return "⁾"; case 'a': return "ᵃ"; case 'b': return "ᵇ"; case 'c': return "ᶜ"; case 'd': return "ᵈ"; case 'e': return "ᵉ"; case 'f': return "ᶠ"; case 'g': return "ᵍ"; case 'h': return "ʰ"; case 'i': return "ⁱ"; case 'j': return "ʲ"; case 'k': return "ᵏ"; case 'l': return "ˡ"; case 'm': return "ᵐ"; case 'n': return "ⁿ"; case 'o': return "ᵒ"; case 'p': return "ᵖ"; case 'r': return "ʳ"; case 's': return "ˢ"; case 't': return "ᵗ"; case 'u': return "ᵘ"; case 'v': return "ᵛ"; case 'w': return "ʷ"; case 'x': return "ˣ"; case 'y': return "ʸ"; case 'z': return "ᶻ"; default: return null; } } }; private static final Map_char map_char_subscript = new Map_char() { public String apply(char c) { switch (c) { case '1': return "₁"; case '2': return "₂"; case '3': return "₃"; case '4': return "₄"; case '5': return "₅"; case '6': return "₆"; case '7': return "₇"; case '8': return "₈"; case '9': return "₉"; case '0': return "₀"; case '+': return "₊"; case '-': return "₋"; case '=': return "₌"; case '(': return "₍"; case ')': return "₎"; case 'a': return "ₐ"; case 'e': return "ₑ"; case 'h': return "ₕ"; case 'i': return "ᵢ"; case 'j': return "ⱼ"; case 'k': return "ₖ"; case 'l': return "ₗ"; case 'm': return "ₘ"; case 'n': return "ₙ"; case 'o': return "ₒ"; case 'p': return "ₚ"; case 'r': return "ᵣ"; case 's': return "ₛ"; case 't': return "ₜ"; case 'u': return "ᵤ"; case 'v': return "ᵥ"; case 'x': return "ₓ"; default: return null; } } }; private static final Map_char map_char_arrows = new Map_char() { public String apply(char c) { switch (c) { case '1': return "↙"; case '2': return "↓"; case '3': return "↘"; case '4': return "←"; case '6': return "→"; case '7': return "↖"; case '8': return "↑"; case '9': return "↗"; default: return null; } } }; private static final Map_char map_char_arrow_right = new Map_char() { public String apply(char c) { switch (c) { default: return c + "\u20D7"; } } }; private static final Map_char map_char_box = new Map_char() { public String apply(char c) { switch (c) { case '1': return "└"; case '2': return "┴"; case '3': return "┘"; case '4': return "├"; case '5': return "┼"; case '6': return "┤"; case '7': return "┌"; case '8': return "┬"; case '9': return "┐"; case '0': return "─"; case '.': return "│"; default: return null; } } }; private static final Map_char map_char_slash = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ⱥ"; case 'b': return "␢"; case 'c': return "ȼ"; case 'e': return "ɇ"; case 'g': return "ꞡ"; case 'k': return "ꝃ"; case 'l': return "ł"; case 'n': return "ꞥ"; case 'o': return "ø"; case 'r': return "ꞧ"; case 's': return "ꞩ"; case 't': return "ⱦ"; default: return null; } } }; private static final Map_char map_char_bar = new Map_char() { public String apply(char c) { switch (c) { case 'b': return "ƀ"; case 'c': return "ꞓ"; case 'd': return "đ"; case 'g': return "ǥ"; case 'i': return "ɨ"; case 'j': return "ɉ"; case 'k': return "ꝁ"; case 'l': return "ƚ"; case 'o': return "ɵ"; case 'p': return "ᵽ"; case 'q': return "ꝗ"; case 'r': return "ɍ"; case 't': return "ŧ"; case 'u': return "ʉ"; case 'y': return "ɏ"; case 'z': return "ƶ"; default: return null; } } }; private static final Map_char map_char_dot_below = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ạ"; case 'ă': return "ặ"; case 'â': return "ậ"; case 'e': return "ẹ"; case 'ê': return "ệ"; case 'i': return "ị"; case 'o': return "ọ"; case 'ô': return "ộ"; case 'ơ': return "ợ"; case 'u': return "ụ"; case 'ư': return "ự"; case 'y': return "ỵ"; default: return null; } } }; private static final Map_char map_char_horn = new Map_char() { public String apply(char c) { switch (c) { case 'o': return "ơ"; case 'ó': return "ớ"; case 'ò': return "ờ"; case 'ỏ': return "ở"; case 'õ': return "ỡ"; case 'ọ': return "ợ"; case 'u': return "ư"; case 'ú': return "ứ"; case 'ù': return "ừ"; case 'ủ': return "ử"; case 'ũ': return "ữ"; case 'ụ': return "ự"; default: return null; } } }; private static final Map_char map_char_hook_above = new Map_char() { public String apply(char c) { switch (c) { case 'a': return "ả"; case 'ă': return "ẳ"; case 'â': return "ẩ"; case 'e': return "ẻ"; case 'ê': return "ể"; case 'i': return "ỉ"; case 'o': return "ỏ"; case 'ô': return "ổ"; case 'ơ': return "ở"; case 'u': return "ủ"; case 'ư': return "ử"; case 'y': return "ỷ"; default: return null; } } }; }