Rename to Kelar Keyboard (org.kelar.inputmethod.latin)

1 files changed, 0 insertions, 1033 deletions

diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
deleted file mode 100644
index a10f2bdb0..000000000
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ /dev/null
@@ -1,1033 +0,0 @@
-/*
- * Copyright (C) 2012 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.latin;
-
-import android.inputmethodservice.InputMethodService;
-import android.os.Build;
-import android.os.Bundle;
-import android.os.SystemClock;
-import android.text.SpannableStringBuilder;
-import android.text.TextUtils;
-import android.text.style.CharacterStyle;
-import android.util.Log;
-import android.view.KeyEvent;
-import android.view.inputmethod.CompletionInfo;
-import android.view.inputmethod.CorrectionInfo;
-import android.view.inputmethod.ExtractedText;
-import android.view.inputmethod.ExtractedTextRequest;
-import android.view.inputmethod.InputConnection;
-import android.view.inputmethod.InputMethodManager;
-
-import com.android.inputmethod.compat.InputConnectionCompatUtils;
-import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.common.UnicodeSurrogate;
-import com.android.inputmethod.latin.common.StringUtils;
-import com.android.inputmethod.latin.inputlogic.PrivateCommandPerformer;
-import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
-import com.android.inputmethod.latin.utils.CapsModeUtils;
-import com.android.inputmethod.latin.utils.DebugLogUtils;
-import com.android.inputmethod.latin.utils.NgramContextUtils;
-import com.android.inputmethod.latin.utils.ScriptUtils;
-import com.android.inputmethod.latin.utils.SpannableStringUtils;
-import com.android.inputmethod.latin.utils.StatsUtils;
-import com.android.inputmethod.latin.utils.TextRange;
-
-import java.util.concurrent.TimeUnit;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-/**
- * Enrichment class for InputConnection to simplify interaction and add functionality.
- *
- * This class serves as a wrapper to be able to simply add hooks to any calls to the underlying
- * InputConnection. It also keeps track of a number of things to avoid having to call upon IPC
- * all the time to find out what text is in the buffer, when we need it to determine caps mode
- * for example.
- */
-public final class RichInputConnection implements PrivateCommandPerformer {
-    private static final String TAG = "RichInputConnection";
-    private static final boolean DBG = false;
-    private static final boolean DEBUG_PREVIOUS_TEXT = false;
-    private static final boolean DEBUG_BATCH_NESTING = false;
-    private static final int NUM_CHARS_TO_GET_BEFORE_CURSOR = 40;
-    private static final int NUM_CHARS_TO_GET_AFTER_CURSOR = 40;
-    private static final int INVALID_CURSOR_POSITION = -1;
-
-    /**
-     * The amount of time a {@link #reloadTextCache} call needs to take for the keyboard to enter
-     * the {@link #hasSlowInputConnection} state.
-     */
-    private static final long SLOW_INPUT_CONNECTION_ON_FULL_RELOAD_MS = 1000;
-    /**
-     * The amount of time a {@link #getTextBeforeCursor} or {@link #getTextAfterCursor} call needs
-     * to take for the keyboard to enter the {@link #hasSlowInputConnection} state.
-     */
-    private static final long SLOW_INPUT_CONNECTION_ON_PARTIAL_RELOAD_MS = 200;
-
-    private static final int OPERATION_GET_TEXT_BEFORE_CURSOR = 0;
-    private static final int OPERATION_GET_TEXT_AFTER_CURSOR = 1;
-    private static final int OPERATION_GET_WORD_RANGE_AT_CURSOR = 2;
-    private static final int OPERATION_RELOAD_TEXT_CACHE = 3;
-    private static final String[] OPERATION_NAMES = new String[] {
-            "GET_TEXT_BEFORE_CURSOR",
-            "GET_TEXT_AFTER_CURSOR",
-            "GET_WORD_RANGE_AT_CURSOR",
-            "RELOAD_TEXT_CACHE"};
-
-    /**
-     * The amount of time the keyboard will persist in the {@link #hasSlowInputConnection} state
-     * after observing a slow InputConnection event.
-     */
-    private static final long SLOW_INPUTCONNECTION_PERSIST_MS = TimeUnit.MINUTES.toMillis(10);
-
-    /**
-     * This variable contains an expected value for the selection start position. This is where the
-     * cursor or selection start may end up after all the keyboard-triggered updates have passed. We
-     * keep this to compare it to the actual selection start to guess whether the move was caused by
-     * a keyboard command or not.
-     * It's not really the selection start position: the selection start may not be there yet, and
-     * in some cases, it may never arrive there.
-     */
-    private int mExpectedSelStart = INVALID_CURSOR_POSITION; // in chars, not code points
-    /**
-     * The expected selection end.  Only differs from mExpectedSelStart if a non-empty selection is
-     * expected.  The same caveats as mExpectedSelStart apply.
-     */
-    private int mExpectedSelEnd = INVALID_CURSOR_POSITION; // in chars, not code points
-    /**
-     * This contains the committed text immediately preceding the cursor and the composing
-     * text, if any. It is refreshed when the cursor moves by calling upon the TextView.
-     */
-    private final StringBuilder mCommittedTextBeforeComposingText = new StringBuilder();
-    /**
-     * This contains the currently composing text, as LatinIME thinks the TextView is seeing it.
-     */
-    private final StringBuilder mComposingText = new StringBuilder();
-
-    /**
-     * This variable is a temporary object used in {@link #commitText(CharSequence,int)}
-     * to avoid object creation.
-     */
-    private SpannableStringBuilder mTempObjectForCommitText = new SpannableStringBuilder();
-
-    private final InputMethodService mParent;
-    private InputConnection mIC;
-    private int mNestLevel;
-
-    /**
-     * The timestamp of the last slow InputConnection operation
-     */
-    private long mLastSlowInputConnectionTime = -SLOW_INPUTCONNECTION_PERSIST_MS;
-
-    public RichInputConnection(final InputMethodService parent) {
-        mParent = parent;
-        mIC = null;
-        mNestLevel = 0;
-    }
-
-    public boolean isConnected() {
-        return mIC != null;
-    }
-
-    /**
-     * Returns whether or not the underlying InputConnection is slow. When true, we want to avoid
-     * calling InputConnection methods that trigger an IPC round-trip (e.g., getTextAfterCursor).
-     */
-    public boolean hasSlowInputConnection() {
-        return (SystemClock.uptimeMillis() - mLastSlowInputConnectionTime)
-                        <= SLOW_INPUTCONNECTION_PERSIST_MS;
-    }
-
-    public void onStartInput() {
-        mLastSlowInputConnectionTime = -SLOW_INPUTCONNECTION_PERSIST_MS;
-    }
-
-    private void checkConsistencyForDebug() {
-        final ExtractedTextRequest r = new ExtractedTextRequest();
-        r.hintMaxChars = 0;
-        r.hintMaxLines = 0;
-        r.token = 1;
-        r.flags = 0;
-        final ExtractedText et = mIC.getExtractedText(r, 0);
-        final CharSequence beforeCursor = getTextBeforeCursor(Constants.EDITOR_CONTENTS_CACHE_SIZE,
-                0);
-        final StringBuilder internal = new StringBuilder(mCommittedTextBeforeComposingText)
-                .append(mComposingText);
-        if (null == et || null == beforeCursor) return;
-        final int actualLength = Math.min(beforeCursor.length(), internal.length());
-        if (internal.length() > actualLength) {
-            internal.delete(0, internal.length() - actualLength);
-        }
-        final String reference = (beforeCursor.length() <= actualLength) ? beforeCursor.toString()
-                : beforeCursor.subSequence(beforeCursor.length() - actualLength,
-                        beforeCursor.length()).toString();
-        if (et.selectionStart != mExpectedSelStart
-                || !(reference.equals(internal.toString()))) {
-            final String context = "Expected selection start = " + mExpectedSelStart
-                    + "\nActual selection start = " + et.selectionStart
-                    + "\nExpected text = " + internal.length() + " " + internal
-                    + "\nActual text = " + reference.length() + " " + reference;
-            ((LatinIME)mParent).debugDumpStateAndCrashWithException(context);
-        } else {
-            Log.e(TAG, DebugLogUtils.getStackTrace(2));
-            Log.e(TAG, "Exp <> Actual : " + mExpectedSelStart + " <> " + et.selectionStart);
-        }
-    }
-
-    public void beginBatchEdit() {
-        if (++mNestLevel == 1) {
-            mIC = mParent.getCurrentInputConnection();
-            if (isConnected()) {
-                mIC.beginBatchEdit();
-            }
-        } else {
-            if (DBG) {
-                throw new RuntimeException("Nest level too deep");
-            }
-            Log.e(TAG, "Nest level too deep : " + mNestLevel);
-        }
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    public void endBatchEdit() {
-        if (mNestLevel <= 0) Log.e(TAG, "Batch edit not in progress!"); // TODO: exception instead
-        if (--mNestLevel == 0 && isConnected()) {
-            mIC.endBatchEdit();
-        }
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    /**
-     * Reset the cached text and retrieve it again from the editor.
-     *
-     * This should be called when the cursor moved. It's possible that we can't connect to
-     * the application when doing this; notably, this happens sometimes during rotation, probably
-     * because of a race condition in the framework. In this case, we just can't retrieve the
-     * data, so we empty the cache and note that we don't know the new cursor position, and we
-     * return false so that the caller knows about this and can retry later.
-     *
-     * @param newSelStart the new position of the selection start, as received from the system.
-     * @param newSelEnd the new position of the selection end, as received from the system.
-     * @param shouldFinishComposition whether we should finish the composition in progress.
-     * @return true if we were able to connect to the editor successfully, false otherwise. When
-     *   this method returns false, the caches could not be correctly refreshed so they were only
-     *   reset: the caller should try again later to return to normal operation.
-     */
-    public boolean resetCachesUponCursorMoveAndReturnSuccess(final int newSelStart,
-            final int newSelEnd, final boolean shouldFinishComposition) {
-        mExpectedSelStart = newSelStart;
-        mExpectedSelEnd = newSelEnd;
-        mComposingText.setLength(0);
-        final boolean didReloadTextSuccessfully = reloadTextCache();
-        if (!didReloadTextSuccessfully) {
-            Log.d(TAG, "Will try to retrieve text later.");
-            return false;
-        }
-        if (isConnected() && shouldFinishComposition) {
-            mIC.finishComposingText();
-        }
-        return true;
-    }
-
-    /**
-     * Reload the cached text from the InputConnection.
-     *
-     * @return true if successful
-     */
-    private boolean reloadTextCache() {
-        mCommittedTextBeforeComposingText.setLength(0);
-        mIC = mParent.getCurrentInputConnection();
-        // Call upon the inputconnection directly since our own method is using the cache, and
-        // we want to refresh it.
-        final CharSequence textBeforeCursor = getTextBeforeCursorAndDetectLaggyConnection(
-                OPERATION_RELOAD_TEXT_CACHE,
-                SLOW_INPUT_CONNECTION_ON_FULL_RELOAD_MS,
-                Constants.EDITOR_CONTENTS_CACHE_SIZE,
-                0 /* flags */);
-        if (null == textBeforeCursor) {
-            // For some reason the app thinks we are not connected to it. This looks like a
-            // framework bug... Fall back to ground state and return false.
-            mExpectedSelStart = INVALID_CURSOR_POSITION;
-            mExpectedSelEnd = INVALID_CURSOR_POSITION;
-            Log.e(TAG, "Unable to connect to the editor to retrieve text.");
-            return false;
-        }
-        mCommittedTextBeforeComposingText.append(textBeforeCursor);
-        return true;
-    }
-
-    private void checkBatchEdit() {
-        if (mNestLevel != 1) {
-            // TODO: exception instead
-            Log.e(TAG, "Batch edit level incorrect : " + mNestLevel);
-            Log.e(TAG, DebugLogUtils.getStackTrace(4));
-        }
-    }
-
-    public void finishComposingText() {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        // TODO: this is not correct! The cursor is not necessarily after the composing text.
-        // In the practice right now this is only called when input ends so it will be reset so
-        // it works, but it's wrong and should be fixed.
-        mCommittedTextBeforeComposingText.append(mComposingText);
-        mComposingText.setLength(0);
-        if (isConnected()) {
-            mIC.finishComposingText();
-        }
-    }
-
-    /**
-     * Calls {@link InputConnection#commitText(CharSequence, int)}.
-     *
-     * @param text The text to commit. This may include styles.
-     * @param newCursorPosition The new cursor position around the text.
-     */
-    public void commitText(final CharSequence text, final int newCursorPosition) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        mCommittedTextBeforeComposingText.append(text);
-        // TODO: the following is exceedingly error-prone. Right now when the cursor is in the
-        // middle of the composing word mComposingText only holds the part of the composing text
-        // that is before the cursor, so this actually works, but it's terribly confusing. Fix this.
-        mExpectedSelStart += text.length() - mComposingText.length();
-        mExpectedSelEnd = mExpectedSelStart;
-        mComposingText.setLength(0);
-        if (isConnected()) {
-            mTempObjectForCommitText.clear();
-            mTempObjectForCommitText.append(text);
-            final CharacterStyle[] spans = mTempObjectForCommitText.getSpans(
-                    0, text.length(), CharacterStyle.class);
-            for (final CharacterStyle span : spans) {
-                final int spanStart = mTempObjectForCommitText.getSpanStart(span);
-                final int spanEnd = mTempObjectForCommitText.getSpanEnd(span);
-                final int spanFlags = mTempObjectForCommitText.getSpanFlags(span);
-                // We have to adjust the end of the span to include an additional character.
-                // This is to avoid splitting a unicode surrogate pair.
-                // See com.android.inputmethod.latin.common.Constants.UnicodeSurrogate
-                // See https://b.corp.google.com/issues/19255233
-                if (0 < spanEnd && spanEnd < mTempObjectForCommitText.length()) {
-                    final char spanEndChar = mTempObjectForCommitText.charAt(spanEnd - 1);
-                    final char nextChar = mTempObjectForCommitText.charAt(spanEnd);
-                    if (UnicodeSurrogate.isLowSurrogate(spanEndChar)
-                            && UnicodeSurrogate.isHighSurrogate(nextChar)) {
-                        mTempObjectForCommitText.setSpan(span, spanStart, spanEnd + 1, spanFlags);
-                    }
-                }
-            }
-            mIC.commitText(mTempObjectForCommitText, newCursorPosition);
-        }
-    }
-
-    @Nullable
-    public CharSequence getSelectedText(final int flags) {
-        return isConnected() ?  mIC.getSelectedText(flags) : null;
-    }
-
-    public boolean canDeleteCharacters() {
-        return mExpectedSelStart > 0;
-    }
-
-    /**
-     * Gets the caps modes we should be in after this specific string.
-     *
-     * This returns a bit set of TextUtils#CAP_MODE_*, masked by the inputType argument.
-     * This method also supports faking an additional space after the string passed in argument,
-     * to support cases where a space will be added automatically, like in phantom space
-     * state for example.
-     * Note that for English, we are using American typography rules (which are not specific to
-     * American English, it's just the most common set of rules for English).
-     *
-     * @param inputType a mask of the caps modes to test for.
-     * @param spacingAndPunctuations the values of the settings to use for locale and separators.
-     * @param hasSpaceBefore if we should consider there should be a space after the string.
-     * @return the caps modes that should be on as a set of bits
-     */
-    public int getCursorCapsMode(final int inputType,
-            final SpacingAndPunctuations spacingAndPunctuations, final boolean hasSpaceBefore) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return Constants.TextUtils.CAP_MODE_OFF;
-        }
-        if (!TextUtils.isEmpty(mComposingText)) {
-            if (hasSpaceBefore) {
-                // If we have some composing text and a space before, then we should have
-                // MODE_CHARACTERS and MODE_WORDS on.
-                return (TextUtils.CAP_MODE_CHARACTERS | TextUtils.CAP_MODE_WORDS) & inputType;
-            }
-            // We have some composing text - we should be in MODE_CHARACTERS only.
-            return TextUtils.CAP_MODE_CHARACTERS & inputType;
-        }
-        // TODO: this will generally work, but there may be cases where the buffer contains SOME
-        // information but not enough to determine the caps mode accurately. This may happen after
-        // heavy pressing of delete, for example DEFAULT_TEXT_CACHE_SIZE - 5 times or so.
-        // getCapsMode should be updated to be able to return a "not enough info" result so that
-        // we can get more context only when needed.
-        if (TextUtils.isEmpty(mCommittedTextBeforeComposingText) && 0 != mExpectedSelStart) {
-            if (!reloadTextCache()) {
-                Log.w(TAG, "Unable to connect to the editor. "
-                        + "Setting caps mode without knowing text.");
-            }
-        }
-        // This never calls InputConnection#getCapsMode - in fact, it's a static method that
-        // never blocks or initiates IPC.
-        // TODO: don't call #toString() here. Instead, all accesses to
-        // mCommittedTextBeforeComposingText should be done on the main thread.
-        return CapsModeUtils.getCapsMode(mCommittedTextBeforeComposingText.toString(), inputType,
-                spacingAndPunctuations, hasSpaceBefore);
-    }
-
-    public int getCodePointBeforeCursor() {
-        final int length = mCommittedTextBeforeComposingText.length();
-        if (length < 1) return Constants.NOT_A_CODE;
-        return Character.codePointBefore(mCommittedTextBeforeComposingText, length);
-    }
-
-    public CharSequence getTextBeforeCursor(final int n, final int flags) {
-        final int cachedLength =
-                mCommittedTextBeforeComposingText.length() + mComposingText.length();
-        // If we have enough characters to satisfy the request, or if we have all characters in
-        // the text field, then we can return the cached version right away.
-        // However, if we don't have an expected cursor position, then we should always
-        // go fetch the cache again (as it happens, INVALID_CURSOR_POSITION < 0, so we need to
-        // test for this explicitly)
-        if (INVALID_CURSOR_POSITION != mExpectedSelStart
-                && (cachedLength >= n || cachedLength >= mExpectedSelStart)) {
-            final StringBuilder s = new StringBuilder(mCommittedTextBeforeComposingText);
-            // We call #toString() here to create a temporary object.
-            // In some situations, this method is called on a worker thread, and it's possible
-            // the main thread touches the contents of mComposingText while this worker thread
-            // is suspended, because mComposingText is a StringBuilder. This may lead to crashes,
-            // so we call #toString() on it. That will result in the return value being strictly
-            // speaking wrong, but since this is used for basing bigram probability off, and
-            // it's only going to matter for one getSuggestions call, it's fine in the practice.
-            s.append(mComposingText.toString());
-            if (s.length() > n) {
-                s.delete(0, s.length() - n);
-            }
-            return s;
-        }
-        return getTextBeforeCursorAndDetectLaggyConnection(
-                OPERATION_GET_TEXT_BEFORE_CURSOR,
-                SLOW_INPUT_CONNECTION_ON_PARTIAL_RELOAD_MS,
-                n, flags);
-    }
-
-    private CharSequence getTextBeforeCursorAndDetectLaggyConnection(
-            final int operation, final long timeout, final int n, final int flags) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return null;
-        }
-        final long startTime = SystemClock.uptimeMillis();
-        final CharSequence result = mIC.getTextBeforeCursor(n, flags);
-        detectLaggyConnection(operation, timeout, startTime);
-        return result;
-    }
-
-    public CharSequence getTextAfterCursor(final int n, final int flags) {
-        return getTextAfterCursorAndDetectLaggyConnection(
-                OPERATION_GET_TEXT_AFTER_CURSOR,
-                SLOW_INPUT_CONNECTION_ON_PARTIAL_RELOAD_MS,
-                n, flags);
-    }
-
-    private CharSequence getTextAfterCursorAndDetectLaggyConnection(
-            final int operation, final long timeout, final int n, final int flags) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return null;
-        }
-        final long startTime = SystemClock.uptimeMillis();
-        final CharSequence result = mIC.getTextAfterCursor(n, flags);
-        detectLaggyConnection(operation, timeout, startTime);
-        return result;
-    }
-
-    private void detectLaggyConnection(final int operation, final long timeout, final long startTime) {
-        final long duration = SystemClock.uptimeMillis() - startTime;
-        if (duration >= timeout) {
-            final String operationName = OPERATION_NAMES[operation];
-            Log.w(TAG, "Slow InputConnection: " + operationName + " took " + duration + " ms.");
-            StatsUtils.onInputConnectionLaggy(operation, duration);
-            mLastSlowInputConnectionTime = SystemClock.uptimeMillis();
-        }
-    }
-
-    public void deleteTextBeforeCursor(final int beforeLength) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        // TODO: the following is incorrect if the cursor is not immediately after the composition.
-        // Right now we never come here in this case because we reset the composing state before we
-        // come here in this case, but we need to fix this.
-        final int remainingChars = mComposingText.length() - beforeLength;
-        if (remainingChars >= 0) {
-            mComposingText.setLength(remainingChars);
-        } else {
-            mComposingText.setLength(0);
-            // Never cut under 0
-            final int len = Math.max(mCommittedTextBeforeComposingText.length()
-                    + remainingChars, 0);
-            mCommittedTextBeforeComposingText.setLength(len);
-        }
-        if (mExpectedSelStart > beforeLength) {
-            mExpectedSelStart -= beforeLength;
-            mExpectedSelEnd -= beforeLength;
-        } else {
-            // There are fewer characters before the cursor in the buffer than we are being asked to
-            // delete. Only delete what is there, and update the end with the amount deleted.
-            mExpectedSelEnd -= mExpectedSelStart;
-            mExpectedSelStart = 0;
-        }
-        if (isConnected()) {
-            mIC.deleteSurroundingText(beforeLength, 0);
-        }
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    public void performEditorAction(final int actionId) {
-        mIC = mParent.getCurrentInputConnection();
-        if (isConnected()) {
-            mIC.performEditorAction(actionId);
-        }
-    }
-
-    public void sendKeyEvent(final KeyEvent keyEvent) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
-            if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-            // This method is only called for enter or backspace when speaking to old applications
-            // (target SDK <= 15 (Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)), or for digits.
-            // When talking to new applications we never use this method because it's inherently
-            // racy and has unpredictable results, but for backward compatibility we continue
-            // sending the key events for only Enter and Backspace because some applications
-            // mistakenly catch them to do some stuff.
-            switch (keyEvent.getKeyCode()) {
-            case KeyEvent.KEYCODE_ENTER:
-                mCommittedTextBeforeComposingText.append("\n");
-                mExpectedSelStart += 1;
-                mExpectedSelEnd = mExpectedSelStart;
-                break;
-            case KeyEvent.KEYCODE_DEL:
-                if (0 == mComposingText.length()) {
-                    if (mCommittedTextBeforeComposingText.length() > 0) {
-                        mCommittedTextBeforeComposingText.delete(
-                                mCommittedTextBeforeComposingText.length() - 1,
-                                mCommittedTextBeforeComposingText.length());
-                    }
-                } else {
-                    mComposingText.delete(mComposingText.length() - 1, mComposingText.length());
-                }
-                if (mExpectedSelStart > 0 && mExpectedSelStart == mExpectedSelEnd) {
-                    // TODO: Handle surrogate pairs.
-                    mExpectedSelStart -= 1;
-                }
-                mExpectedSelEnd = mExpectedSelStart;
-                break;
-            case KeyEvent.KEYCODE_UNKNOWN:
-                if (null != keyEvent.getCharacters()) {
-                    mCommittedTextBeforeComposingText.append(keyEvent.getCharacters());
-                    mExpectedSelStart += keyEvent.getCharacters().length();
-                    mExpectedSelEnd = mExpectedSelStart;
-                }
-                break;
-            default:
-                final String text = StringUtils.newSingleCodePointString(keyEvent.getUnicodeChar());
-                mCommittedTextBeforeComposingText.append(text);
-                mExpectedSelStart += text.length();
-                mExpectedSelEnd = mExpectedSelStart;
-                break;
-            }
-        }
-        if (isConnected()) {
-            mIC.sendKeyEvent(keyEvent);
-        }
-    }
-
-    public void setComposingRegion(final int start, final int end) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        final CharSequence textBeforeCursor =
-                getTextBeforeCursor(Constants.EDITOR_CONTENTS_CACHE_SIZE + (end - start), 0);
-        mCommittedTextBeforeComposingText.setLength(0);
-        if (!TextUtils.isEmpty(textBeforeCursor)) {
-            // The cursor is not necessarily at the end of the composing text, but we have its
-            // position in mExpectedSelStart and mExpectedSelEnd. In this case we want the start
-            // of the text, so we should use mExpectedSelStart. In other words, the composing
-            // text starts (mExpectedSelStart - start) characters before the end of textBeforeCursor
-            final int indexOfStartOfComposingText =
-                    Math.max(textBeforeCursor.length() - (mExpectedSelStart - start), 0);
-            mComposingText.append(textBeforeCursor.subSequence(indexOfStartOfComposingText,
-                    textBeforeCursor.length()));
-            mCommittedTextBeforeComposingText.append(
-                    textBeforeCursor.subSequence(0, indexOfStartOfComposingText));
-        }
-        if (isConnected()) {
-            mIC.setComposingRegion(start, end);
-        }
-    }
-
-    public void setComposingText(final CharSequence text, final int newCursorPosition) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        mExpectedSelStart += text.length() - mComposingText.length();
-        mExpectedSelEnd = mExpectedSelStart;
-        mComposingText.setLength(0);
-        mComposingText.append(text);
-        // TODO: support values of newCursorPosition != 1. At this time, this is never called with
-        // newCursorPosition != 1.
-        if (isConnected()) {
-            mIC.setComposingText(text, newCursorPosition);
-        }
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    /**
-     * Set the selection of the text editor.
-     *
-     * Calls through to {@link InputConnection#setSelection(int, int)}.
-     *
-     * @param start the character index where the selection should start.
-     * @param end the character index where the selection should end.
-     * @return Returns true on success, false on failure: either the input connection is no longer
-     * valid when setting the selection or when retrieving the text cache at that point, or
-     * invalid arguments were passed.
-     */
-    public boolean setSelection(final int start, final int end) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        if (start < 0 || end < 0) {
-            return false;
-        }
-        mExpectedSelStart = start;
-        mExpectedSelEnd = end;
-        if (isConnected()) {
-            final boolean isIcValid = mIC.setSelection(start, end);
-            if (!isIcValid) {
-                return false;
-            }
-        }
-        return reloadTextCache();
-    }
-
-    public void commitCorrection(final CorrectionInfo correctionInfo) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        // This has no effect on the text field and does not change its content. It only makes
-        // TextView flash the text for a second based on indices contained in the argument.
-        if (isConnected()) {
-            mIC.commitCorrection(correctionInfo);
-        }
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    public void commitCompletion(final CompletionInfo completionInfo) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-        CharSequence text = completionInfo.getText();
-        // text should never be null, but just in case, it's better to insert nothing than to crash
-        if (null == text) text = "";
-        mCommittedTextBeforeComposingText.append(text);
-        mExpectedSelStart += text.length() - mComposingText.length();
-        mExpectedSelEnd = mExpectedSelStart;
-        mComposingText.setLength(0);
-        if (isConnected()) {
-            mIC.commitCompletion(completionInfo);
-        }
-        if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
-    }
-
-    @SuppressWarnings("unused")
-    @Nonnull
-    public NgramContext getNgramContextFromNthPreviousWord(
-            final SpacingAndPunctuations spacingAndPunctuations, final int n) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return NgramContext.EMPTY_PREV_WORDS_INFO;
-        }
-        final CharSequence prev = getTextBeforeCursor(NUM_CHARS_TO_GET_BEFORE_CURSOR, 0);
-        if (DEBUG_PREVIOUS_TEXT && null != prev) {
-            final int checkLength = NUM_CHARS_TO_GET_BEFORE_CURSOR - 1;
-            final String reference = prev.length() <= checkLength ? prev.toString()
-                    : prev.subSequence(prev.length() - checkLength, prev.length()).toString();
-            // TODO: right now the following works because mComposingText holds the part of the
-            // composing text that is before the cursor, but this is very confusing. We should
-            // fix it.
-            final StringBuilder internal = new StringBuilder()
-                    .append(mCommittedTextBeforeComposingText).append(mComposingText);
-            if (internal.length() > checkLength) {
-                internal.delete(0, internal.length() - checkLength);
-                if (!(reference.equals(internal.toString()))) {
-                    final String context =
-                            "Expected text = " + internal + "\nActual text = " + reference;
-                    ((LatinIME)mParent).debugDumpStateAndCrashWithException(context);
-                }
-            }
-        }
-        return NgramContextUtils.getNgramContextFromNthPreviousWord(
-                prev, spacingAndPunctuations, n);
-    }
-
-    private static boolean isPartOfCompositionForScript(final int codePoint,
-            final SpacingAndPunctuations spacingAndPunctuations, final int scriptId) {
-        // We always consider word connectors part of compositions.
-        return spacingAndPunctuations.isWordConnector(codePoint)
-                // Otherwise, it's part of composition if it's part of script and not a separator.
-                || (!spacingAndPunctuations.isWordSeparator(codePoint)
-                        && ScriptUtils.isLetterPartOfScript(codePoint, scriptId));
-    }
-
-    /**
-     * Returns the text surrounding the cursor.
-     *
-     * @param spacingAndPunctuations the rules for spacing and punctuation
-     * @param scriptId the script we consider to be writing words, as one of ScriptUtils.SCRIPT_*
-     * @return a range containing the text surrounding the cursor
-     */
-    public TextRange getWordRangeAtCursor(final SpacingAndPunctuations spacingAndPunctuations,
-            final int scriptId) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return null;
-        }
-        final CharSequence before = getTextBeforeCursorAndDetectLaggyConnection(
-                OPERATION_GET_WORD_RANGE_AT_CURSOR,
-                SLOW_INPUT_CONNECTION_ON_PARTIAL_RELOAD_MS,
-                NUM_CHARS_TO_GET_BEFORE_CURSOR,
-                InputConnection.GET_TEXT_WITH_STYLES);
-        final CharSequence after = getTextAfterCursorAndDetectLaggyConnection(
-                OPERATION_GET_WORD_RANGE_AT_CURSOR,
-                SLOW_INPUT_CONNECTION_ON_PARTIAL_RELOAD_MS,
-                NUM_CHARS_TO_GET_AFTER_CURSOR,
-                InputConnection.GET_TEXT_WITH_STYLES);
-        if (before == null || after == null) {
-            return null;
-        }
-
-        // Going backward, find the first breaking point (separator)
-        int startIndexInBefore = before.length();
-        while (startIndexInBefore > 0) {
-            final int codePoint = Character.codePointBefore(before, startIndexInBefore);
-            if (!isPartOfCompositionForScript(codePoint, spacingAndPunctuations, scriptId)) {
-                break;
-            }
-            --startIndexInBefore;
-            if (Character.isSupplementaryCodePoint(codePoint)) {
-                --startIndexInBefore;
-            }
-        }
-
-        // Find last word separator after the cursor
-        int endIndexInAfter = -1;
-        while (++endIndexInAfter < after.length()) {
-            final int codePoint = Character.codePointAt(after, endIndexInAfter);
-            if (!isPartOfCompositionForScript(codePoint, spacingAndPunctuations, scriptId)) {
-                break;
-            }
-            if (Character.isSupplementaryCodePoint(codePoint)) {
-                ++endIndexInAfter;
-            }
-        }
-
-        final boolean hasUrlSpans =
-                SpannableStringUtils.hasUrlSpans(before, startIndexInBefore, before.length())
-                || SpannableStringUtils.hasUrlSpans(after, 0, endIndexInAfter);
-        // We don't use TextUtils#concat because it copies all spans without respect to their
-        // nature. If the text includes a PARAGRAPH span and it has been split, then
-        // TextUtils#concat will crash when it tries to concat both sides of it.
-        return new TextRange(
-                SpannableStringUtils.concatWithNonParagraphSuggestionSpansOnly(before, after),
-                        startIndexInBefore, before.length() + endIndexInAfter, before.length(),
-                        hasUrlSpans);
-    }
-
-    public boolean isCursorTouchingWord(final SpacingAndPunctuations spacingAndPunctuations,
-            boolean checkTextAfter) {
-        if (checkTextAfter && isCursorFollowedByWordCharacter(spacingAndPunctuations)) {
-            // If what's after the cursor is a word character, then we're touching a word.
-            return true;
-        }
-        final String textBeforeCursor = mCommittedTextBeforeComposingText.toString();
-        int indexOfCodePointInJavaChars = textBeforeCursor.length();
-        int consideredCodePoint = 0 == indexOfCodePointInJavaChars ? Constants.NOT_A_CODE
-                : textBeforeCursor.codePointBefore(indexOfCodePointInJavaChars);
-        // Search for the first non word-connector char
-        if (spacingAndPunctuations.isWordConnector(consideredCodePoint)) {
-            indexOfCodePointInJavaChars -= Character.charCount(consideredCodePoint);
-            consideredCodePoint = 0 == indexOfCodePointInJavaChars ? Constants.NOT_A_CODE
-                    : textBeforeCursor.codePointBefore(indexOfCodePointInJavaChars);
-        }
-        return !(Constants.NOT_A_CODE == consideredCodePoint
-                || spacingAndPunctuations.isWordSeparator(consideredCodePoint)
-                || spacingAndPunctuations.isWordConnector(consideredCodePoint));
-    }
-
-    public boolean isCursorFollowedByWordCharacter(
-            final SpacingAndPunctuations spacingAndPunctuations) {
-        final CharSequence after = getTextAfterCursor(1, 0);
-        if (TextUtils.isEmpty(after)) {
-            return false;
-        }
-        final int codePointAfterCursor = Character.codePointAt(after, 0);
-        if (spacingAndPunctuations.isWordSeparator(codePointAfterCursor)
-                || spacingAndPunctuations.isWordConnector(codePointAfterCursor)) {
-            return false;
-        }
-        return true;
-    }
-
-    public void removeTrailingSpace() {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        final int codePointBeforeCursor = getCodePointBeforeCursor();
-        if (Constants.CODE_SPACE == codePointBeforeCursor) {
-            deleteTextBeforeCursor(1);
-        }
-    }
-
-    public boolean sameAsTextBeforeCursor(final CharSequence text) {
-        final CharSequence beforeText = getTextBeforeCursor(text.length(), 0);
-        return TextUtils.equals(text, beforeText);
-    }
-
-    public boolean revertDoubleSpacePeriod(final SpacingAndPunctuations spacingAndPunctuations) {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        // Here we test whether we indeed have a period and a space before us. This should not
-        // be needed, but it's there just in case something went wrong.
-        final CharSequence textBeforeCursor = getTextBeforeCursor(2, 0);
-        if (!TextUtils.equals(spacingAndPunctuations.mSentenceSeparatorAndSpace,
-                textBeforeCursor)) {
-            // Theoretically we should not be coming here if there isn't ". " before the
-            // cursor, but the application may be changing the text while we are typing, so
-            // anything goes. We should not crash.
-            Log.d(TAG, "Tried to revert double-space combo but we didn't find \""
-                    + spacingAndPunctuations.mSentenceSeparatorAndSpace
-                    + "\" just before the cursor.");
-            return false;
-        }
-        // Double-space results in ". ". A backspace to cancel this should result in a single
-        // space in the text field, so we replace ". " with a single space.
-        deleteTextBeforeCursor(2);
-        final String singleSpace = " ";
-        commitText(singleSpace, 1);
-        return true;
-    }
-
-    public boolean revertSwapPunctuation() {
-        if (DEBUG_BATCH_NESTING) checkBatchEdit();
-        // Here we test whether we indeed have a space and something else before us. This should not
-        // be needed, but it's there just in case something went wrong.
-        final CharSequence textBeforeCursor = getTextBeforeCursor(2, 0);
-        // NOTE: This does not work with surrogate pairs. Hopefully when the keyboard is able to
-        // enter surrogate pairs this code will have been removed.
-        if (TextUtils.isEmpty(textBeforeCursor)
-                || (Constants.CODE_SPACE != textBeforeCursor.charAt(1))) {
-            // We may only come here if the application is changing the text while we are typing.
-            // This is quite a broken case, but not logically impossible, so we shouldn't crash,
-            // but some debugging log may be in order.
-            Log.d(TAG, "Tried to revert a swap of punctuation but we didn't "
-                    + "find a space just before the cursor.");
-            return false;
-        }
-        deleteTextBeforeCursor(2);
-        final String text = " " + textBeforeCursor.subSequence(0, 1);
-        commitText(text, 1);
-        return true;
-    }
-
-    /**
-     * Heuristic to determine if this is an expected update of the cursor.
-     *
-     * Sometimes updates to the cursor position are late because of their asynchronous nature.
-     * This method tries to determine if this update is one, based on the values of the cursor
-     * position in the update, and the currently expected position of the cursor according to
-     * LatinIME's internal accounting. If this is not a belated expected update, then it should
-     * mean that the user moved the cursor explicitly.
-     * This is quite robust, but of course it's not perfect. In particular, it will fail in the
-     * case we get an update A, the user types in N characters so as to move the cursor to A+N but
-     * we don't get those, and then the user places the cursor between A and A+N, and we get only
-     * this update and not the ones in-between. This is almost impossible to achieve even trying
-     * very very hard.
-     *
-     * @param oldSelStart The value of the old selection in the update.
-     * @param newSelStart The value of the new selection in the update.
-     * @param oldSelEnd The value of the old selection end in the update.
-     * @param newSelEnd The value of the new selection end in the update.
-     * @return whether this is a belated expected update or not.
-     */
-    public boolean isBelatedExpectedUpdate(final int oldSelStart, final int newSelStart,
-            final int oldSelEnd, final int newSelEnd) {
-        // This update is "belated" if we are expecting it. That is, mExpectedSelStart and
-        // mExpectedSelEnd match the new values that the TextView is updating TO.
-        if (mExpectedSelStart == newSelStart && mExpectedSelEnd == newSelEnd) return true;
-        // This update is not belated if mExpectedSelStart and mExpectedSelEnd match the old
-        // values, and one of newSelStart or newSelEnd is updated to a different value. In this
-        // case, it is likely that something other than the IME has moved the selection endpoint
-        // to the new value.
-        if (mExpectedSelStart == oldSelStart && mExpectedSelEnd == oldSelEnd
-                && (oldSelStart != newSelStart || oldSelEnd != newSelEnd)) return false;
-        // If neither of the above two cases hold, then the system may be having trouble keeping up
-        // with updates. If 1) the selection is a cursor, 2) newSelStart is between oldSelStart
-        // and mExpectedSelStart, and 3) newSelEnd is between oldSelEnd and mExpectedSelEnd, then
-        // assume a belated update.
-        return (newSelStart == newSelEnd)
-                && (newSelStart - oldSelStart) * (mExpectedSelStart - newSelStart) >= 0
-                && (newSelEnd - oldSelEnd) * (mExpectedSelEnd - newSelEnd) >= 0;
-    }
-
-    /**
-     * Looks at the text just before the cursor to find out if it looks like a URL.
-     *
-     * The weakest point here is, if we don't have enough text bufferized, we may fail to realize
-     * we are in URL situation, but other places in this class have the same limitation and it
-     * does not matter too much in the practice.
-     */
-    public boolean textBeforeCursorLooksLikeURL() {
-        return StringUtils.lastPartLooksLikeURL(mCommittedTextBeforeComposingText);
-    }
-
-    /**
-     * Looks at the text just before the cursor to find out if we are inside a double quote.
-     *
-     * As with #textBeforeCursorLooksLikeURL, this is dependent on how much text we have cached.
-     * However this won't be a concrete problem in most situations, as the cache is almost always
-     * long enough for this use.
-     */
-    public boolean isInsideDoubleQuoteOrAfterDigit() {
-        return StringUtils.isInsideDoubleQuoteOrAfterDigit(mCommittedTextBeforeComposingText);
-    }
-
-    /**
-     * Try to get the text from the editor to expose lies the framework may have been
-     * telling us. Concretely, when the device rotates and when the keyboard reopens in the same
-     * text field after having been closed with the back key, the frameworks tells us about where
-     * the cursor used to be initially in the editor at the time it first received the focus; this
-     * may be completely different from the place it is upon rotation. Since we don't have any
-     * means to get the real value, try at least to ask the text view for some characters and
-     * detect the most damaging cases: when the cursor position is declared to be much smaller
-     * than it really is.
-     */
-    public void tryFixLyingCursorPosition() {
-        mIC = mParent.getCurrentInputConnection();
-        final CharSequence textBeforeCursor = getTextBeforeCursor(
-                Constants.EDITOR_CONTENTS_CACHE_SIZE, 0);
-        final CharSequence selectedText = isConnected() ? mIC.getSelectedText(0 /* flags */) : null;
-        if (null == textBeforeCursor ||
-                (!TextUtils.isEmpty(selectedText) && mExpectedSelEnd == mExpectedSelStart)) {
-            // If textBeforeCursor is null, we have no idea what kind of text field we have or if
-            // thinking about the "cursor position" actually makes any sense. In this case we
-            // remember a meaningless cursor position. Contrast this with an empty string, which is
-            // valid and should mean the cursor is at the start of the text.
-            // Also, if we expect we don't have a selection but we DO have non-empty selected text,
-            // then the framework lied to us about the cursor position. In this case, we should just
-            // revert to the most basic behavior possible for the next action (backspace in
-            // particular comes to mind), so we remember a meaningless cursor position which should
-            // result in degraded behavior from the next input.
-            // Interestingly, in either case, chances are any action the user takes next will result
-            // in a call to onUpdateSelection, which should set things right.
-            mExpectedSelStart = mExpectedSelEnd = Constants.NOT_A_CURSOR_POSITION;
-        } else {
-            final int textLength = textBeforeCursor.length();
-            if (textLength < Constants.EDITOR_CONTENTS_CACHE_SIZE
-                    && (textLength > mExpectedSelStart
-                            ||  mExpectedSelStart < Constants.EDITOR_CONTENTS_CACHE_SIZE)) {
-                // It should not be possible to have only one of those variables be
-                // NOT_A_CURSOR_POSITION, so if they are equal, either the selection is zero-sized
-                // (simple cursor, no selection) or there is no cursor/we don't know its pos
-                final boolean wasEqual = mExpectedSelStart == mExpectedSelEnd;
-                mExpectedSelStart = textLength;
-                // We can't figure out the value of mLastSelectionEnd :(
-                // But at least if it's smaller than mLastSelectionStart something is wrong,
-                // and if they used to be equal we also don't want to make it look like there is a
-                // selection.
-                if (wasEqual || mExpectedSelStart > mExpectedSelEnd) {
-                    mExpectedSelEnd = mExpectedSelStart;
-                }
-            }
-        }
-    }
-
-    @Override
-    public boolean performPrivateCommand(final String action, final Bundle data) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return false;
-        }
-        return mIC.performPrivateCommand(action, data);
-    }
-
-    public int getExpectedSelectionStart() {
-        return mExpectedSelStart;
-    }
-
-    public int getExpectedSelectionEnd() {
-        return mExpectedSelEnd;
-    }
-
-    /**
-     * @return whether there is a selection currently active.
-     */
-    public boolean hasSelection() {
-        return mExpectedSelEnd != mExpectedSelStart;
-    }
-
-    public boolean isCursorPositionKnown() {
-        return INVALID_CURSOR_POSITION != mExpectedSelStart;
-    }
-
-    /**
-     * Work around a bug that was present before Jelly Bean upon rotation.
-     *
-     * Before Jelly Bean, there is a bug where setComposingRegion and other committing
-     * functions on the input connection get ignored until the cursor moves. This method works
-     * around the bug by wiggling the cursor first, which reactivates the connection and has
-     * the subsequent methods work, then restoring it to its original position.
-     *
-     * On platforms on which this method is not present, this is a no-op.
-     */
-    public void maybeMoveTheCursorAroundAndRestoreToWorkaroundABug() {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
-            if (mExpectedSelStart > 0) {
-                mIC.setSelection(mExpectedSelStart - 1, mExpectedSelStart - 1);
-            } else {
-                mIC.setSelection(mExpectedSelStart + 1, mExpectedSelStart + 1);
-            }
-            mIC.setSelection(mExpectedSelStart, mExpectedSelEnd);
-        }
-    }
-
-    /**
-     * Requests the editor to call back {@link InputMethodManager#updateCursorAnchorInfo}.
-     * @param enableMonitor {@code true} to request the editor to call back the method whenever the
-     * cursor/anchor position is changed.
-     * @param requestImmediateCallback {@code true} to request the editor to call back the method
-     * as soon as possible to notify the current cursor/anchor position to the input method.
-     * @return {@code true} if the request is accepted. Returns {@code false} otherwise, which
-     * includes "not implemented" or "rejected" or "temporarily unavailable" or whatever which
-     * prevents the application from fulfilling the request. (TODO: Improve the API when it turns
-     * out that we actually need more detailed error codes)
-     */
-    public boolean requestCursorUpdates(final boolean enableMonitor,
-            final boolean requestImmediateCallback) {
-        mIC = mParent.getCurrentInputConnection();
-        if (!isConnected()) {
-            return false;
-        }
-        return InputConnectionCompatUtils.requestCursorUpdates(
-                mIC, enableMonitor, requestImmediateCallback);
-    }
-}