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KeyModifier.java
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KeyModifier.java
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package juloo.keyboard2;
import android.view.KeyCharacterMap;
import android.view.KeyEvent;
import java.util.HashMap;
public final class KeyModifier
{
/** The optional modmap takes priority over modifiers usual behaviors. Set to
[null] to disable. */
private static KeyboardData.Modmap _modmap = null;
public static void set_modmap(KeyboardData.Modmap mm)
{
_modmap = mm;
}
/** 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();
KeyValue r = k;
for (int i = 0; i < n_mods; i++)
r = modify(r, mods.get(i));
/* Keys with an empty string are placeholder keys. */
if (r.getString().length() == 0)
return null;
return r;
}
public static KeyValue modify(KeyValue k, KeyValue mod)
{
switch (mod.getKind())
{
case Modifier:
return modify(k, mod.getModifier());
case Compose_pending:
return ComposeKey.apply(mod.getPendingCompose(), k);
case Hangul_initial:
if (k.equals(mod)) // Allow typing the initial in letter form
return KeyValue.makeStringKey(k.getString(), KeyValue.FLAG_GREYED);
return combine_hangul_initial(k, mod.getHangulPrecomposed());
case Hangul_medial:
return combine_hangul_medial(k, mod.getHangulPrecomposed());
}
return k;
}
public static KeyValue modify(KeyValue k, KeyValue.Modifier mod)
{
switch (mod)
{
case CTRL: return apply_ctrl(k);
case ALT:
case META: return turn_into_keyevent(k);
case FN: return apply_fn(k);
case GESTURE: return apply_gesture(k);
case SHIFT: return apply_shift(k);
case GRAVE: return apply_compose_or_dead_char(k, ComposeKeyData.accent_grave, '\u02CB');
case AIGU: return apply_compose_or_dead_char(k, ComposeKeyData.accent_aigu, '\u00B4');
case CIRCONFLEXE: return apply_compose_or_dead_char(k, ComposeKeyData.accent_circonflexe, '\u02C6');
case TILDE: return apply_compose_or_dead_char(k, ComposeKeyData.accent_tilde, '\u02DC');
case CEDILLE: return apply_compose_or_dead_char(k, ComposeKeyData.accent_cedille, '\u00B8');
case TREMA: return apply_compose_or_dead_char(k, ComposeKeyData.accent_trema, '\u00A8');
case CARON: return apply_compose_or_dead_char(k, ComposeKeyData.accent_caron, '\u02C7');
case RING: return apply_compose_or_dead_char(k, ComposeKeyData.accent_ring, '\u02DA');
case MACRON: return apply_compose_or_dead_char(k, ComposeKeyData.accent_macron, '\u00AF');
case OGONEK: return apply_compose_or_dead_char(k, ComposeKeyData.accent_ogonek, '\u02DB');
case DOT_ABOVE: return apply_compose_or_dead_char(k, ComposeKeyData.accent_dot_above, '\u02D9');
case BREVE: return apply_dead_char(k, '\u02D8');
case DOUBLE_AIGU: return apply_compose(k, ComposeKeyData.accent_double_aigu);
case ORDINAL: return apply_compose(k, ComposeKeyData.accent_ordinal);
case SUPERSCRIPT: return apply_compose(k, ComposeKeyData.accent_superscript);
case SUBSCRIPT: return apply_compose(k, ComposeKeyData.accent_subscript);
case ARROWS: return apply_compose(k, ComposeKeyData.accent_arrows);
case BOX: return apply_compose(k, ComposeKeyData.accent_box);
case SLASH: return apply_compose(k, ComposeKeyData.accent_slash);
case BAR: return apply_compose(k, ComposeKeyData.accent_bar);
case DOT_BELOW: return apply_compose(k, ComposeKeyData.accent_dot_below);
case HORN: return apply_compose(k, ComposeKeyData.accent_horn);
case HOOK_ABOVE: return apply_compose(k, ComposeKeyData.accent_hook_above);
case ARROW_RIGHT: return apply_map_char(k, map_char_arrow_right);
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_AUTO:
return KeyValue.getKeyByName("change_method");
case SWITCH_VOICE_TYPING:
return KeyValue.getKeyByName("voice_typing_chooser");
}
break;
}
return k;
}
public static Map_char modify_numpad_script(String numpad_script)
{
if (numpad_script == null)
return map_char_none;
switch (numpad_script)
{
case "hindu-arabic": return map_char_numpad_hindu;
case "bengali": return map_char_numpad_bengali;
case "devanagari": return map_char_numpad_devanagari;
case "persian": return map_char_numpad_persian;
case "gujarati": return map_char_numpad_gujarati;
default: return map_char_none;
}
}
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 KeyValue.makeStringKey(modified, k.getFlags());
}
return k;
}
/** Apply the given compose state or fallback to the dead_char. */
private static KeyValue apply_compose_or_dead_char(KeyValue k, int state, char dead_char)
{
switch (k.getKind())
{
case Char:
char c = k.getChar();
KeyValue r = ComposeKey.apply(state, c);
if (r != null)
return r;
}
return apply_dead_char(k, dead_char);
}
private static KeyValue apply_compose(KeyValue k, int state)
{
switch (k.getKind())
{
case Char:
KeyValue r = ComposeKey.apply(state, k.getChar());
if (r != null)
return r;
}
return k;
}
private static KeyValue apply_dead_char(KeyValue k, char dead_char)
{
switch (k.getKind())
{
case Char:
char c = k.getChar();
char modified = (char)KeyCharacterMap.getDeadChar(dead_char, c);
if (modified != 0 && modified != c)
return KeyValue.makeStringKey(String.valueOf(modified));
}
return k;
}
private static KeyValue apply_shift(KeyValue k)
{
if (_modmap != null)
{
KeyValue mapped = _modmap.shift.get(k);
if (mapped != null)
return mapped;
}
switch (k.getKind())
{
case Char:
char kc = k.getChar();
KeyValue r = ComposeKey.apply(ComposeKeyData.shift, kc);
if (r != null)
return r;
char c = Character.toUpperCase(kc);
return (kc == c) ? k : k.withChar(c);
case String:
String s = Utils.capitalize_string(k.getString());
return KeyValue.makeStringKey(s, k.getFlags());
default: return k;
}
}
private static KeyValue apply_fn(KeyValue k)
{
if (_modmap != null)
{
KeyValue mapped = _modmap.fn.get(k);
if (mapped != null)
return mapped;
}
String name = null;
switch (k.getKind())
{
case Char:
KeyValue r = ComposeKey.apply(ComposeKeyData.fn, k.getChar());
return (r != null) ? r : k;
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;
case Cursor_move: name = apply_fn_cursormove(k.getCursorMove()); 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";
case KeyEvent.KEYCODE_PAGE_UP:
case KeyEvent.KEYCODE_PAGE_DOWN:
case KeyEvent.KEYCODE_MOVE_HOME:
case KeyEvent.KEYCODE_MOVE_END: return "removed";
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;
}
}
private static String apply_fn_cursormove(short cur)
{
switch (cur)
{
case -1 : return "home"; // cursor_left
case 1 : return "end"; // cursor_right
default: return null;
}
}
private static KeyValue apply_ctrl(KeyValue k)
{
if (_modmap != null)
{
KeyValue mapped = _modmap.ctrl.get(k);
// Do not return the modified character right away, first turn it into a
// key event.
if (mapped != null)
k = mapped;
}
return turn_into_keyevent(k);
}
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);
}
/** Modify a key affected by a round-trip or a clockwise circle gesture. */
private static KeyValue apply_gesture(KeyValue k)
{
KeyValue shifted = apply_shift(k);
if (shifted == null || shifted.equals(k))
return apply_fn(k);
return shifted;
}
public 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 final Map_char map_char_none =
new Map_char() {
public String apply(char _c) { 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";
}
}
};
// Used with Arabic despite the name; called "Hindi numerals" in Arabic
// map_char_numpad_devanagari is used in Hindi
private static final Map_char map_char_numpad_hindu =
new Map_char() {
public String apply(char c)
{
switch (c)
{
case '0': return "٠";
case '1': return "١";
case '2': return "٢";
case '3': return "٣";
case '4': return "٤";
case '5': return "٥";
case '6': return "٦";
case '7': return "٧";
case '8': return "٨";
case '9': return "٩";
default: return null;
}
}
};
private static final Map_char map_char_numpad_bengali =
new Map_char() {
public String apply(char c)
{
switch (c)
{
case '0': return "০";
case '1': return "১";
case '2': return "২";
case '3': return "৩";
case '4': return "৪";
case '5': return "৫";
case '6': return "৬";
case '7': return "৭";
case '8': return "৮";
case '9': return "৯";
default: return null;
}
}
};
private static final Map_char map_char_numpad_devanagari =
new Map_char() {
public String apply(char c)
{
switch (c)
{
case '0': return "०";
case '1': return "१";
case '2': return "२";
case '3': return "३";
case '4': return "४";
case '5': return "५";
case '6': return "६";
case '7': return "७";
case '8': return "८";
case '9': return "९";
default: return null;
}
}
};
private static final Map_char map_char_numpad_persian =
new Map_char() {
public String apply(char c)
{
switch (c)
{
case '0': return "۰";
case '1': return "۱";
case '2': return "۲";
case '3': return "۳";
case '4': return "۴";
case '5': return "۵";
case '6': return "۶";
case '7': return "۷";
case '8': return "۸";
case '9': return "۹";
default: return null;
}
}
};
private static final Map_char map_char_numpad_gujarati =
new Map_char() {
public String apply(char c)
{
switch (c)
{
case '0': return "૦";
case '1': return "૧";
case '2': return "૨";
case '3': return "૩";
case '4': return "૪";
case '5': return "૫";
case '6': return "૬";
case '7': return "૭";
case '8': return "૮";
case '9': return "૯";
default: return null;
}
}
};
/** Compose the precomposed initial with the medial [kv]. */
private static KeyValue combine_hangul_initial(KeyValue kv, int precomposed)
{
switch (kv.getKind())
{
case Char:
return combine_hangul_initial(kv, kv.getChar(), precomposed);
case Hangul_initial:
// No initials are expected to compose, grey out
return kv.withFlags(kv.getFlags() | KeyValue.FLAG_GREYED);
default:
return kv;
}
}
private static KeyValue combine_hangul_initial(KeyValue kv, char medial,
int precomposed)
{
int medial_idx;
switch (medial)
{
// Vowels
case 'ㅏ': medial_idx = 0; break;
case 'ㅐ': medial_idx = 1; break;
case 'ㅑ': medial_idx = 2; break;
case 'ㅒ': medial_idx = 3; break;
case 'ㅓ': medial_idx = 4; break;
case 'ㅔ': medial_idx = 5; break;
case 'ㅕ': medial_idx = 6; break;
case 'ㅖ': medial_idx = 7; break;
case 'ㅗ': medial_idx = 8; break;
case 'ㅘ': medial_idx = 9; break;
case 'ㅙ': medial_idx = 10; break;
case 'ㅚ': medial_idx = 11; break;
case 'ㅛ': medial_idx = 12; break;
case 'ㅜ': medial_idx = 13; break;
case 'ㅝ': medial_idx = 14; break;
case 'ㅞ': medial_idx = 15; break;
case 'ㅟ': medial_idx = 16; break;
case 'ㅠ': medial_idx = 17; break;
case 'ㅡ': medial_idx = 18; break;
case 'ㅢ': medial_idx = 19; break;
case 'ㅣ': medial_idx = 20; break;
// Grey-out uncomposable characters
default: return kv.withFlags(kv.getFlags() | KeyValue.FLAG_GREYED);
}
return KeyValue.makeHangulMedial(precomposed, medial_idx);
}
/** Combine the precomposed medial with the final [kv]. */
private static KeyValue combine_hangul_medial(KeyValue kv, int precomposed)
{
switch (kv.getKind())
{
case Char:
return combine_hangul_medial(kv, kv.getChar(), precomposed);
case Hangul_initial:
// Finals that can also be initials have this kind.
return combine_hangul_medial(kv, kv.getString().charAt(0), precomposed);
default:
return kv;
}
}
private static KeyValue combine_hangul_medial(KeyValue kv, char c,
int precomposed)
{
int final_idx;
switch (c)
{
case ' ': final_idx = 0; break;
case 'ㄱ': final_idx = 1; break;
case 'ㄲ': final_idx = 2; break;
case 'ㄳ': final_idx = 3; break;
case 'ㄴ': final_idx = 4; break;
case 'ㄵ': final_idx = 5; break;
case 'ㄶ': final_idx = 6; break;
case 'ㄷ': final_idx = 7; break;
case 'ㄹ': final_idx = 8; break;
case 'ㄺ': final_idx = 9; break;
case 'ㄻ': final_idx = 10; break;
case 'ㄼ': final_idx = 11; break;
case 'ㄽ': final_idx = 12; break;
case 'ㄾ': final_idx = 13; break;
case 'ㄿ': final_idx = 14; break;
case 'ㅀ': final_idx = 15; break;
case 'ㅁ': final_idx = 16; break;
case 'ㅂ': final_idx = 17; break;
case 'ㅄ': final_idx = 18; break;
case 'ㅅ': final_idx = 19; break;
case 'ㅆ': final_idx = 20; break;
case 'ㅇ': final_idx = 21; break;
case 'ㅈ': final_idx = 22; break;
case 'ㅊ': final_idx = 23; break;
case 'ㅋ': final_idx = 24; break;
case 'ㅌ': final_idx = 25; break;
case 'ㅍ': final_idx = 26; break;
case 'ㅎ': final_idx = 27; break;
// Grey-out uncomposable characters
default: return kv.withFlags(kv.getFlags() | KeyValue.FLAG_GREYED);
}
return KeyValue.makeHangulFinal(precomposed, final_idx);
}
}