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Diffstat (limited to 'java/src/com/android/inputmethod/event/MyanmarReordering.java')
| -rw-r--r-- | java/src/com/android/inputmethod/event/MyanmarReordering.java | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/java/src/com/android/inputmethod/event/MyanmarReordering.java b/java/src/com/android/inputmethod/event/MyanmarReordering.java deleted file mode 100644 index 7bc1630f5..000000000 --- a/java/src/com/android/inputmethod/event/MyanmarReordering.java +++ /dev/null @@ -1,265 +0,0 @@ -/* - * Copyright (C) 2014 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 com.android.inputmethod.latin.common.Constants; - -import java.util.ArrayList; -import java.util.Arrays; - -import javax.annotation.Nonnull; - -/** - * A combiner that reorders input for Myanmar. - */ -public class MyanmarReordering implements Combiner { - // U+1031 MYANMAR VOWEL SIGN E - private final static int VOWEL_E = 0x1031; // Code point for vowel E that we need to reorder - // U+200C ZERO WIDTH NON-JOINER - // U+200B ZERO WIDTH SPACE - private final static int ZERO_WIDTH_NON_JOINER = 0x200B; // should be 0x200C - - private final ArrayList<Event> mCurrentEvents = new ArrayList<>(); - - // List of consonants : - // U+1000 MYANMAR LETTER KA - // U+1001 MYANMAR LETTER KHA - // U+1002 MYANMAR LETTER GA - // U+1003 MYANMAR LETTER GHA - // U+1004 MYANMAR LETTER NGA - // U+1005 MYANMAR LETTER CA - // U+1006 MYANMAR LETTER CHA - // U+1007 MYANMAR LETTER JA - // U+1008 MYANMAR LETTER JHA - // U+1009 MYANMAR LETTER NYA - // U+100A MYANMAR LETTER NNYA - // U+100B MYANMAR LETTER TTA - // U+100C MYANMAR LETTER TTHA - // U+100D MYANMAR LETTER DDA - // U+100E MYANMAR LETTER DDHA - // U+100F MYANMAR LETTER NNA - // U+1010 MYANMAR LETTER TA - // U+1011 MYANMAR LETTER THA - // U+1012 MYANMAR LETTER DA - // U+1013 MYANMAR LETTER DHA - // U+1014 MYANMAR LETTER NA - // U+1015 MYANMAR LETTER PA - // U+1016 MYANMAR LETTER PHA - // U+1017 MYANMAR LETTER BA - // U+1018 MYANMAR LETTER BHA - // U+1019 MYANMAR LETTER MA - // U+101A MYANMAR LETTER YA - // U+101B MYANMAR LETTER RA - // U+101C MYANMAR LETTER LA - // U+101D MYANMAR LETTER WA - // U+101E MYANMAR LETTER SA - // U+101F MYANMAR LETTER HA - // U+1020 MYANMAR LETTER LLA - // U+103F MYANMAR LETTER GREAT SA - private static boolean isConsonant(final int codePoint) { - return (codePoint >= 0x1000 && codePoint <= 0x1020) || 0x103F == codePoint; - } - - // List of medials : - // U+103B MYANMAR CONSONANT SIGN MEDIAL YA - // U+103C MYANMAR CONSONANT SIGN MEDIAL RA - // U+103D MYANMAR CONSONANT SIGN MEDIAL WA - // U+103E MYANMAR CONSONANT SIGN MEDIAL HA - // U+105E MYANMAR CONSONANT SIGN MON MEDIAL NA - // U+105F MYANMAR CONSONANT SIGN MON MEDIAL MA - // U+1060 MYANMAR CONSONANT SIGN MON MEDIAL LA - // U+1082 MYANMAR CONSONANT SIGN SHAN MEDIAL WA - private static int[] MEDIAL_LIST = { 0x103B, 0x103C, 0x103D, 0x103E, - 0x105E, 0x105F, 0x1060, 0x1082}; - private static boolean isMedial(final int codePoint) { - return Arrays.binarySearch(MEDIAL_LIST, codePoint) >= 0; - } - - private static boolean isConsonantOrMedial(final int codePoint) { - return isConsonant(codePoint) || isMedial(codePoint); - } - - private Event getLastEvent() { - final int size = mCurrentEvents.size(); - if (size <= 0) { - return null; - } - return mCurrentEvents.get(size - 1); - } - - private CharSequence getCharSequence() { - final StringBuilder s = new StringBuilder(); - for (final Event e : mCurrentEvents) { - s.appendCodePoint(e.mCodePoint); - } - return s; - } - - /** - * Clears the currently combining stream of events and returns the resulting software text - * event corresponding to the stream. Optionally adds a new event to the cleared stream. - * @param newEvent the new event to add to the stream. null if none. - * @return the resulting software text event. Never null. - */ - @Nonnull - private Event clearAndGetResultingEvent(final Event newEvent) { - final CharSequence combinedText; - if (mCurrentEvents.size() > 0) { - combinedText = getCharSequence(); - mCurrentEvents.clear(); - } else { - combinedText = null; - } - if (null != newEvent) { - mCurrentEvents.add(newEvent); - } - return null == combinedText ? Event.createConsumedEvent(newEvent) - : Event.createSoftwareTextEvent(combinedText, Event.NOT_A_KEY_CODE); - } - - @Override - @Nonnull - public Event processEvent(ArrayList<Event> previousEvents, Event newEvent) { - final int codePoint = newEvent.mCodePoint; - if (VOWEL_E == codePoint) { - final Event lastEvent = getLastEvent(); - if (null == lastEvent) { - mCurrentEvents.add(newEvent); - return Event.createConsumedEvent(newEvent); - } - if (isConsonantOrMedial(lastEvent.mCodePoint)) { - final Event resultingEvent = clearAndGetResultingEvent(null); - mCurrentEvents.add(Event.createSoftwareKeypressEvent(ZERO_WIDTH_NON_JOINER, - Event.NOT_A_KEY_CODE, - Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE, - false /* isKeyRepeat */)); - mCurrentEvents.add(newEvent); - return resultingEvent; - } - // VOWEL_E == lastCodePoint. But if that was anything else this is correct too. - return clearAndGetResultingEvent(newEvent); - } - if (isConsonant(codePoint)) { - final Event lastEvent = getLastEvent(); - if (null == lastEvent) { - mCurrentEvents.add(newEvent); - return Event.createConsumedEvent(newEvent); - } - if (VOWEL_E == lastEvent.mCodePoint) { - final int eventSize = mCurrentEvents.size(); - if (eventSize >= 2 - && mCurrentEvents.get(eventSize - 2).mCodePoint == ZERO_WIDTH_NON_JOINER) { - // We have a ZWJN before a vowel E. We need to remove the ZWNJ and then - // reorder the vowel with respect to the consonant. - mCurrentEvents.remove(eventSize - 1); - mCurrentEvents.remove(eventSize - 2); - mCurrentEvents.add(newEvent); - mCurrentEvents.add(lastEvent); - return Event.createConsumedEvent(newEvent); - } - // If there is already a consonant, then we are starting a new syllable. - for (int i = eventSize - 2; i >= 0; --i) { - if (isConsonant(mCurrentEvents.get(i).mCodePoint)) { - return clearAndGetResultingEvent(newEvent); - } - } - // If we come here, we didn't have a consonant so we reorder - mCurrentEvents.remove(eventSize - 1); - mCurrentEvents.add(newEvent); - mCurrentEvents.add(lastEvent); - return Event.createConsumedEvent(newEvent); - } - // lastCodePoint is a consonant/medial. But if it's something else it's fine - return clearAndGetResultingEvent(newEvent); - } - if (isMedial(codePoint)) { - final Event lastEvent = getLastEvent(); - if (null == lastEvent) { - mCurrentEvents.add(newEvent); - return Event.createConsumedEvent(newEvent); - } - if (VOWEL_E == lastEvent.mCodePoint) { - final int eventSize = mCurrentEvents.size(); - // If there is already a consonant, then we are in the middle of a syllable, and we - // need to reorder. - boolean hasConsonant = false; - for (int i = eventSize - 2; i >= 0; --i) { - if (isConsonant(mCurrentEvents.get(i).mCodePoint)) { - hasConsonant = true; - break; - } - } - if (hasConsonant) { - mCurrentEvents.remove(eventSize - 1); - mCurrentEvents.add(newEvent); - mCurrentEvents.add(lastEvent); - return Event.createConsumedEvent(newEvent); - } - // Otherwise, we just commit everything. - return clearAndGetResultingEvent(null); - } - // lastCodePoint is a consonant/medial. But if it's something else it's fine - return clearAndGetResultingEvent(newEvent); - } - final Event lastEvent = getLastEvent(); - if (Constants.CODE_DELETE == newEvent.mKeyCode && null != lastEvent) { - final int eventSize = mCurrentEvents.size(); - if (VOWEL_E == lastEvent.mCodePoint) { - // We have a VOWEL_E at the end. There are four cases. - // - The vowel is the only code point in the buffer. Remove it. - // - The vowel is preceded by a ZWNJ. Remove both vowel E and ZWNJ. - // - The vowel is preceded by a consonant/medial, remove the consonant/medial. - // - In all other cases, it's strange, so just remove the last code point. - if (eventSize <= 1) { - mCurrentEvents.clear(); - } else { // eventSize >= 2 - final int previousCodePoint = mCurrentEvents.get(eventSize - 2).mCodePoint; - if (previousCodePoint == ZERO_WIDTH_NON_JOINER) { - mCurrentEvents.remove(eventSize - 1); - mCurrentEvents.remove(eventSize - 2); - } else if (isConsonantOrMedial(previousCodePoint)) { - mCurrentEvents.remove(eventSize - 2); - } else { - mCurrentEvents.remove(eventSize - 1); - } - } - return Event.createConsumedEvent(newEvent); - } else if (eventSize > 0) { - mCurrentEvents.remove(eventSize - 1); - return Event.createConsumedEvent(newEvent); - } - } - // This character is not part of the combining scheme, so we should reset everything. - if (mCurrentEvents.size() > 0) { - // If we have events in flight, then add the new event and return the resulting event. - mCurrentEvents.add(newEvent); - return clearAndGetResultingEvent(null); - } - // If we don't have any events in flight, then just pass this one through. - return newEvent; - } - - @Override - public CharSequence getCombiningStateFeedback() { - return getCharSequence(); - } - - @Override - public void reset() { - mCurrentEvents.clear(); - } -} |