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authorAmin Bandali <bandali@kelar.org>2024-12-16 21:45:41 -0500
committerAmin Bandali <bandali@kelar.org>2025-01-11 14:17:35 -0500
commite9a0e66716dab4dd3184d009d8920de1961efdfa (patch)
tree02dcc096643d74645bf28459c2834c3d4a2ad7f2 /java/src/com/android/inputmethod/event/DeadKeyCombiner.java
parentfb3b9360d70596d7e921de8bf7d3ca99564a077e (diff)
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Rename to Kelar Keyboard (org.kelar.inputmethod.latin)
Diffstat (limited to 'java/src/com/android/inputmethod/event/DeadKeyCombiner.java')
-rw-r--r--java/src/com/android/inputmethod/event/DeadKeyCombiner.java303
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diff --git a/java/src/com/android/inputmethod/event/DeadKeyCombiner.java b/java/src/com/android/inputmethod/event/DeadKeyCombiner.java
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--- a/java/src/com/android/inputmethod/event/DeadKeyCombiner.java
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@@ -1,303 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.inputmethod.event;
-
-import android.text.TextUtils;
-import android.util.SparseIntArray;
-
-import com.android.inputmethod.latin.common.Constants;
-
-import java.text.Normalizer;
-import java.util.ArrayList;
-
-import javax.annotation.Nonnull;
-
-/**
- * A combiner that handles dead keys.
- */
-public class DeadKeyCombiner implements Combiner {
-
- private static class Data {
- // This class data taken from KeyCharacterMap.java.
-
- /* Characters used to display placeholders for dead keys. */
- private static final int ACCENT_ACUTE = '\u00B4';
- private static final int ACCENT_BREVE = '\u02D8';
- private static final int ACCENT_CARON = '\u02C7';
- private static final int ACCENT_CEDILLA = '\u00B8';
- private static final int ACCENT_CIRCUMFLEX = '\u02C6';
- private static final int ACCENT_COMMA_ABOVE = '\u1FBD';
- private static final int ACCENT_COMMA_ABOVE_RIGHT = '\u02BC';
- private static final int ACCENT_DOT_ABOVE = '\u02D9';
- private static final int ACCENT_DOT_BELOW = Constants.CODE_PERIOD; // approximate
- private static final int ACCENT_DOUBLE_ACUTE = '\u02DD';
- private static final int ACCENT_GRAVE = '\u02CB';
- private static final int ACCENT_HOOK_ABOVE = '\u02C0';
- private static final int ACCENT_HORN = Constants.CODE_SINGLE_QUOTE; // approximate
- private static final int ACCENT_MACRON = '\u00AF';
- private static final int ACCENT_MACRON_BELOW = '\u02CD';
- private static final int ACCENT_OGONEK = '\u02DB';
- private static final int ACCENT_REVERSED_COMMA_ABOVE = '\u02BD';
- private static final int ACCENT_RING_ABOVE = '\u02DA';
- private static final int ACCENT_STROKE = Constants.CODE_DASH; // approximate
- private static final int ACCENT_TILDE = '\u02DC';
- private static final int ACCENT_TURNED_COMMA_ABOVE = '\u02BB';
- private static final int ACCENT_UMLAUT = '\u00A8';
- private static final int ACCENT_VERTICAL_LINE_ABOVE = '\u02C8';
- private static final int ACCENT_VERTICAL_LINE_BELOW = '\u02CC';
-
- /* Legacy dead key display characters used in previous versions of the API (before L)
- * We still support these characters by mapping them to their non-legacy version. */
- private static final int ACCENT_GRAVE_LEGACY = Constants.CODE_GRAVE_ACCENT;
- private static final int ACCENT_CIRCUMFLEX_LEGACY = Constants.CODE_CIRCUMFLEX_ACCENT;
- private static final int ACCENT_TILDE_LEGACY = Constants.CODE_TILDE;
-
- /**
- * Maps Unicode combining diacritical to display-form dead key.
- */
- static final SparseIntArray sCombiningToAccent = new SparseIntArray();
- static final SparseIntArray sAccentToCombining = new SparseIntArray();
- static {
- // U+0300: COMBINING GRAVE ACCENT
- addCombining('\u0300', ACCENT_GRAVE);
- // U+0301: COMBINING ACUTE ACCENT
- addCombining('\u0301', ACCENT_ACUTE);
- // U+0302: COMBINING CIRCUMFLEX ACCENT
- addCombining('\u0302', ACCENT_CIRCUMFLEX);
- // U+0303: COMBINING TILDE
- addCombining('\u0303', ACCENT_TILDE);
- // U+0304: COMBINING MACRON
- addCombining('\u0304', ACCENT_MACRON);
- // U+0306: COMBINING BREVE
- addCombining('\u0306', ACCENT_BREVE);
- // U+0307: COMBINING DOT ABOVE
- addCombining('\u0307', ACCENT_DOT_ABOVE);
- // U+0308: COMBINING DIAERESIS
- addCombining('\u0308', ACCENT_UMLAUT);
- // U+0309: COMBINING HOOK ABOVE
- addCombining('\u0309', ACCENT_HOOK_ABOVE);
- // U+030A: COMBINING RING ABOVE
- addCombining('\u030A', ACCENT_RING_ABOVE);
- // U+030B: COMBINING DOUBLE ACUTE ACCENT
- addCombining('\u030B', ACCENT_DOUBLE_ACUTE);
- // U+030C: COMBINING CARON
- addCombining('\u030C', ACCENT_CARON);
- // U+030D: COMBINING VERTICAL LINE ABOVE
- addCombining('\u030D', ACCENT_VERTICAL_LINE_ABOVE);
- // U+030E: COMBINING DOUBLE VERTICAL LINE ABOVE
- //addCombining('\u030E', ACCENT_DOUBLE_VERTICAL_LINE_ABOVE);
- // U+030F: COMBINING DOUBLE GRAVE ACCENT
- //addCombining('\u030F', ACCENT_DOUBLE_GRAVE);
- // U+0310: COMBINING CANDRABINDU
- //addCombining('\u0310', ACCENT_CANDRABINDU);
- // U+0311: COMBINING INVERTED BREVE
- //addCombining('\u0311', ACCENT_INVERTED_BREVE);
- // U+0312: COMBINING TURNED COMMA ABOVE
- addCombining('\u0312', ACCENT_TURNED_COMMA_ABOVE);
- // U+0313: COMBINING COMMA ABOVE
- addCombining('\u0313', ACCENT_COMMA_ABOVE);
- // U+0314: COMBINING REVERSED COMMA ABOVE
- addCombining('\u0314', ACCENT_REVERSED_COMMA_ABOVE);
- // U+0315: COMBINING COMMA ABOVE RIGHT
- addCombining('\u0315', ACCENT_COMMA_ABOVE_RIGHT);
- // U+031B: COMBINING HORN
- addCombining('\u031B', ACCENT_HORN);
- // U+0323: COMBINING DOT BELOW
- addCombining('\u0323', ACCENT_DOT_BELOW);
- // U+0326: COMBINING COMMA BELOW
- //addCombining('\u0326', ACCENT_COMMA_BELOW);
- // U+0327: COMBINING CEDILLA
- addCombining('\u0327', ACCENT_CEDILLA);
- // U+0328: COMBINING OGONEK
- addCombining('\u0328', ACCENT_OGONEK);
- // U+0329: COMBINING VERTICAL LINE BELOW
- addCombining('\u0329', ACCENT_VERTICAL_LINE_BELOW);
- // U+0331: COMBINING MACRON BELOW
- addCombining('\u0331', ACCENT_MACRON_BELOW);
- // U+0335: COMBINING SHORT STROKE OVERLAY
- addCombining('\u0335', ACCENT_STROKE);
- // U+0342: COMBINING GREEK PERISPOMENI
- //addCombining('\u0342', ACCENT_PERISPOMENI);
- // U+0344: COMBINING GREEK DIALYTIKA TONOS
- //addCombining('\u0344', ACCENT_DIALYTIKA_TONOS);
- // U+0345: COMBINING GREEK YPOGEGRAMMENI
- //addCombining('\u0345', ACCENT_YPOGEGRAMMENI);
-
- // One-way mappings to equivalent preferred accents.
- // U+0340: COMBINING GRAVE TONE MARK
- sCombiningToAccent.append('\u0340', ACCENT_GRAVE);
- // U+0341: COMBINING ACUTE TONE MARK
- sCombiningToAccent.append('\u0341', ACCENT_ACUTE);
- // U+0343: COMBINING GREEK KORONIS
- sCombiningToAccent.append('\u0343', ACCENT_COMMA_ABOVE);
-
- // One-way legacy mappings to preserve compatibility with older applications.
- // U+0300: COMBINING GRAVE ACCENT
- sAccentToCombining.append(ACCENT_GRAVE_LEGACY, '\u0300');
- // U+0302: COMBINING CIRCUMFLEX ACCENT
- sAccentToCombining.append(ACCENT_CIRCUMFLEX_LEGACY, '\u0302');
- // U+0303: COMBINING TILDE
- sAccentToCombining.append(ACCENT_TILDE_LEGACY, '\u0303');
- }
-
- private static void addCombining(int combining, int accent) {
- sCombiningToAccent.append(combining, accent);
- sAccentToCombining.append(accent, combining);
- }
-
- // Caution! This may only contain chars, not supplementary code points. It's unlikely
- // it will ever need to, but if it does we'll have to change this
- private static final SparseIntArray sNonstandardDeadCombinations = new SparseIntArray();
- static {
- // Non-standard decompositions.
- // Stroke modifier for Finnish multilingual keyboard and others.
- // U+0110: LATIN CAPITAL LETTER D WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'D', '\u0110');
- // U+01E4: LATIN CAPITAL LETTER G WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'G', '\u01e4');
- // U+0126: LATIN CAPITAL LETTER H WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'H', '\u0126');
- // U+0197: LATIN CAPITAL LETTER I WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'I', '\u0197');
- // U+0141: LATIN CAPITAL LETTER L WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'L', '\u0141');
- // U+00D8: LATIN CAPITAL LETTER O WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'O', '\u00d8');
- // U+0166: LATIN CAPITAL LETTER T WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'T', '\u0166');
- // U+0111: LATIN SMALL LETTER D WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'd', '\u0111');
- // U+01E5: LATIN SMALL LETTER G WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'g', '\u01e5');
- // U+0127: LATIN SMALL LETTER H WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'h', '\u0127');
- // U+0268: LATIN SMALL LETTER I WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'i', '\u0268');
- // U+0142: LATIN SMALL LETTER L WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'l', '\u0142');
- // U+00F8: LATIN SMALL LETTER O WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 'o', '\u00f8');
- // U+0167: LATIN SMALL LETTER T WITH STROKE
- addNonStandardDeadCombination(ACCENT_STROKE, 't', '\u0167');
- }
-
- private static void addNonStandardDeadCombination(final int deadCodePoint,
- final int spacingCodePoint, final int result) {
- final int combination = (deadCodePoint << 16) | spacingCodePoint;
- sNonstandardDeadCombinations.put(combination, result);
- }
-
- public static final int NOT_A_CHAR = 0;
- public static final int BITS_TO_SHIFT_DEAD_CODE_POINT_FOR_NON_STANDARD_COMBINATION = 16;
- // Get a non-standard combination
- public static char getNonstandardCombination(final int deadCodePoint,
- final int spacingCodePoint) {
- final int combination = spacingCodePoint |
- (deadCodePoint << BITS_TO_SHIFT_DEAD_CODE_POINT_FOR_NON_STANDARD_COMBINATION);
- return (char)sNonstandardDeadCombinations.get(combination, NOT_A_CHAR);
- }
- }
-
- // TODO: make this a list of events instead
- final StringBuilder mDeadSequence = new StringBuilder();
-
- @Nonnull
- private static Event createEventChainFromSequence(final @Nonnull CharSequence text,
- @Nonnull final Event originalEvent) {
- int index = text.length();
- if (index <= 0) {
- return originalEvent;
- }
- Event lastEvent = null;
- do {
- final int codePoint = Character.codePointBefore(text, index);
- lastEvent = Event.createHardwareKeypressEvent(codePoint,
- originalEvent.mKeyCode, lastEvent, false /* isKeyRepeat */);
- index -= Character.charCount(codePoint);
- } while (index > 0);
- return lastEvent;
- }
-
- @Override
- @Nonnull
- public Event processEvent(final ArrayList<Event> previousEvents, final Event event) {
- if (TextUtils.isEmpty(mDeadSequence)) {
- // No dead char is currently being tracked: this is the most common case.
- if (event.isDead()) {
- // The event was a dead key. Start tracking it.
- mDeadSequence.appendCodePoint(event.mCodePoint);
- return Event.createConsumedEvent(event);
- }
- // Regular keystroke when not keeping track of a dead key. Simply said, there are
- // no dead keys at all in the current input, so this combiner has nothing to do and
- // simply returns the event as is. The majority of events will go through this path.
- return event;
- }
- if (Character.isWhitespace(event.mCodePoint)
- || event.mCodePoint == mDeadSequence.codePointBefore(mDeadSequence.length())) {
- // When whitespace or twice the same dead key, we should output the dead sequence as is.
- final Event resultEvent = createEventChainFromSequence(mDeadSequence.toString(),
- event);
- mDeadSequence.setLength(0);
- return resultEvent;
- }
- if (event.isFunctionalKeyEvent()) {
- if (Constants.CODE_DELETE == event.mKeyCode) {
- // Remove the last code point
- final int trimIndex = mDeadSequence.length() - Character.charCount(
- mDeadSequence.codePointBefore(mDeadSequence.length()));
- mDeadSequence.setLength(trimIndex);
- return Event.createConsumedEvent(event);
- }
- return event;
- }
- if (event.isDead()) {
- mDeadSequence.appendCodePoint(event.mCodePoint);
- return Event.createConsumedEvent(event);
- }
- // Combine normally.
- final StringBuilder sb = new StringBuilder();
- sb.appendCodePoint(event.mCodePoint);
- int codePointIndex = 0;
- while (codePointIndex < mDeadSequence.length()) {
- final int deadCodePoint = mDeadSequence.codePointAt(codePointIndex);
- final char replacementSpacingChar =
- Data.getNonstandardCombination(deadCodePoint, event.mCodePoint);
- if (Data.NOT_A_CHAR != replacementSpacingChar) {
- sb.setCharAt(0, replacementSpacingChar);
- } else {
- final int combining = Data.sAccentToCombining.get(deadCodePoint);
- sb.appendCodePoint(0 == combining ? deadCodePoint : combining);
- }
- codePointIndex += Character.isSupplementaryCodePoint(deadCodePoint) ? 2 : 1;
- }
- final String normalizedString = Normalizer.normalize(sb, Normalizer.Form.NFC);
- final Event resultEvent = createEventChainFromSequence(normalizedString, event);
- mDeadSequence.setLength(0);
- return resultEvent;
- }
-
- @Override
- public void reset() {
- mDeadSequence.setLength(0);
- }
-
- @Override
- public CharSequence getCombiningStateFeedback() {
- return mDeadSequence;
- }
-}