private void displayComposingText(String aText, ComposingAction aAction) {
    if (mInputConnection == null) {
        return;
    }
    boolean succeeded = mInputConnection.setComposingText(aText, 1);
    if (!succeeded) {
        // Fix for InlineAutocompleteEditText failed setComposingText() calls
        String fullText = mInputConnection.getExtractedText(new ExtractedTextRequest(),0).text.toString();
        String beforeText = mInputConnection.getTextBeforeCursor(fullText.length(),0).toString();
        if (beforeText.endsWith(mComposingDisplayText)) {
            mInternalDeleteHint = true;
            mInputConnection.deleteSurroundingText(mComposingDisplayText.length(), 0);
        }
        mInputConnection.setComposingText(aText, 1);
    }
    mComposingDisplayText = aText;
    if (aAction == ComposingAction.FINISH) {
        mInputConnection.finishComposingText();
        mComposingText = "";
    }
}
 

@Override
public boolean replace(String str1, String str2) {
    boolean success = false;
    mInputConnection.beginBatchEdit();
    ExtractedText extractedText = mInputConnection.getExtractedText(new ExtractedTextRequest(), 0);
    if (extractedText != null) {
        CharSequence beforeCursor = extractedText.text;
        //CharSequence beforeCursor = mInputConnection.getTextBeforeCursor(MAX_SELECTABLE_CONTEXT, 0);
        Log.i("replace: " + beforeCursor);
        int index = beforeCursor.toString().lastIndexOf(str1);
        Log.i("replace: " + index);
        if (index > 0) {
            mInputConnection.setSelection(index, index);
            mInputConnection.deleteSurroundingText(0, str1.length());
            if (!str2.isEmpty()) {
                mInputConnection.commitText(str2, 0);
            }
            success = true;
        }
        mInputConnection.endBatchEdit();
    }
    return success;
}
 

/**
 * Try to replace the current word with its substitution.
 */
private void replaceText(InputConnection con) {
	ExtractedText txt = con.getExtractedText(new ExtractedTextRequest(), 0);
	if (txt != null) {
		int end = txt.text.toString().indexOf(" ", txt.selectionEnd);
		if (end == -1) {
			end = txt.text.length();
		}
		int start = txt.text.toString().lastIndexOf(" ", txt.selectionEnd - 1);
		start++;
		String sel = txt.text.subSequence(start, end).toString();
		String rep = myService.replacements.get(sel);
		if (rep != null) {
			con.setComposingRegion(start, end);
			con.setComposingText(rep, 1);
			con.finishComposingText();
		}
		else {
			String err = myService.getResources().getString(
					R.string.err_no_replacement, sel);
			Toast.makeText(myService, err, Toast.LENGTH_SHORT).show();
		}
	}
}
 

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);
    }
}
 

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 ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (mTextView != null) {
        ExtractedText et = new ExtractedText();
        if (mTextView.extractText(request, et)) {
            if ((flags&GET_EXTRACTED_TEXT_MONITOR) != 0) {
                mTextView.setExtracting(request);
            }
            return et;
        }
    }
    return null;
}
 

@Override
public void updateExtractedText(@NonNull GeckoSession aSession, @NonNull ExtractedTextRequest request, @NonNull ExtractedText text) {
    if (mState.mSession == aSession) {
        for (GeckoSession.TextInputDelegate listener : mTextInputListeners) {
            listener.updateExtractedText(aSession, request, text);
        }
    }
}
 

private String getTextBeforeCursor(InputConnection aConnection) {
    if (aConnection == null) {
        return "";
    }

    ExtractedText extracted = aConnection.getExtractedText(new ExtractedTextRequest(),0);
    if ((extracted == null) || extracted.text == null) {
        return "";
    }

    String fullText = extracted.text.toString();
    return aConnection.getTextBeforeCursor(fullText.length(),0).toString();
}
 

@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (request == null)
        return null;

    Editable editable = getEditable();
    if (editable == null) {
        return null;
    }
    int selStart = Selection.getSelectionStart(editable);
    int selEnd = Selection.getSelectionEnd(editable);

    ExtractedText extract = new ExtractedText();
    extract.flags = 0;
    extract.partialStartOffset = -1;
    extract.partialEndOffset = -1;
    extract.selectionStart = selStart;
    extract.selectionEnd = selEnd;
    extract.startOffset = 0;
    if ((request.flags & GET_TEXT_WITH_STYLES) != 0) {
        extract.text = new SpannableString(editable);
    } else {
        extract.text = editable.toString();
    }
    mMongolEditText.setExtractedTextToken(request.token);
    return extract;
}
 

@Override
public void moveCursorEnd() {
    InputConnection ic = getInputConnection();
    if (ic == null) return;
    ExtractedText extractedText = ic.getExtractedText(new ExtractedTextRequest(), 0);
    if (extractedText == null || extractedText.text == null) return;
    int length = extractedText.text.length();
    ic.setSelection(length, length);
}
 

@Override
public void selectWordBack() {
    InputConnection ic = getInputConnection();
    if (ic == null) return;
    ExtractedText extractedText = ic.getExtractedText(new ExtractedTextRequest(), 0);
    int previousWordBoundary = getPreviousWordBoundary(extractedText.text, extractedText.selectionStart);
    int start = extractedText.startOffset + previousWordBoundary;
    int end = extractedText.startOffset + extractedText.selectionEnd;
    ic.setSelection(start, end);
}
 

@Override
public void selectWordForward() {
    InputConnection ic = getInputConnection();
    if (ic == null) return;
    ExtractedText extractedText = ic.getExtractedText(new ExtractedTextRequest(), 0);
    int nextWordBoundary = getNextWordBoundary(extractedText.text, extractedText.selectionEnd);
    int start = extractedText.startOffset + extractedText.selectionStart;
    int end = extractedText.startOffset + nextWordBoundary;
    ic.setSelection(start, end);
}
 

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);
    }
}
 

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);
    }
}
 

@Override
public void onStartInput(EditorInfo attribute, boolean restarting) {
    super.onStartInput(attribute, restarting);
    LogUtils.log(this, Log.VERBOSE,
            "onStartInput: inputType: %x, imeOption: %x, " +
            ", label: %s, hint: %s, package: %s, ",
            attribute.inputType, attribute.imeOptions, attribute.label,
            attribute.hintText, attribute.packageName);
    InputConnection ic = getCurrentInputConnection();
    if (ic != null) {
        ExtractedTextRequest req = new ExtractedTextRequest();
        req.token = ++mExtractedTextToken;
        req.hintMaxChars = MAX_REQUEST_CHARS;
        mExtractedText = getCurrentInputConnection().getExtractedText(req,
                InputConnection.GET_EXTRACTED_TEXT_MONITOR);
    } else {
        mExtractedText = null;
    }
    updateCurrentText();
    updateDisplay();
    mComposingBraille.clear();

    Host host = getHost();
    if (host != null) {
        host.onStartInput(attribute, restarting);
    }
}
 

private int getCursorPosition() {
    ExtractedText extracted = inputConnection.getExtractedText(
            new ExtractedTextRequest(), 0);
    if (extracted == null) {
        return -1;
    }
    return extracted.startOffset + extracted.selectionStart;
}
 

@Override
public boolean select(String str) {
    boolean success = false;
    mInputConnection.beginBatchEdit();
    ExtractedText extractedText = mInputConnection.getExtractedText(new ExtractedTextRequest(), 0);
    CharSequence beforeCursor = extractedText.text;
    int index = beforeCursor.toString().lastIndexOf(str);
    if (index > 0) {
        mInputConnection.setSelection(index, index + str.length());
        success = true;
    }
    mInputConnection.endBatchEdit();
    return success;
}
 

@Override
    public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
//        return ic.getExtractedText(request, flags);
        String text = editAreaView.getSelectedText();
        if (text == null) text = "";
        ExtractedText et = new ExtractedText();
        et.text = text;
        et.partialEndOffset = text.length();
        et.selectionStart = 0;
        et.selectionEnd = text.length();
        et.flags = 0;
        return et;
    }
 

private void checkReCorrectionOnStart() {
    if (mReCorrectionEnabled && isPredictionOn()) {
        // First get the cursor position. This is required by
        // setOldSuggestions(), so that
        // it can pass the correct range to setComposingRegion(). At this
        // point, we don't
        // have valid values for mLastSelectionStart/Stop because
        // onUpdateSelection() has
        // not been called yet.
        InputConnection ic = getCurrentInputConnection();
        if (ic == null)
            return;
        ExtractedTextRequest etr = new ExtractedTextRequest();
        etr.token = 0; // anything is fine here
        ExtractedText et = ic.getExtractedText(etr, 0);
        if (et == null)
            return;

        mLastSelectionStart = et.startOffset + et.selectionStart;
        mLastSelectionEnd = et.startOffset + et.selectionEnd;

        // Then look for possible corrections in a delayed fashion
        if (!TextUtils.isEmpty(et.text) && isCursorTouchingWord()) {
            postUpdateOldSuggestions();
        }
    }
}
 

private static int getCursorPosition(InputConnection connection) {
    ExtractedText extracted = connection.getExtractedText(
        new ExtractedTextRequest(), 0);
    if (extracted == null) {
      return -1;
    }
    return extracted.startOffset + extracted.selectionStart;
}
 

/**
 * @see InputConnection#getExtractedText(android.view.inputmethod.ExtractedTextRequest, int)
 */
@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (DEBUG_LOGS) Log.i(TAG, "getExtractedText");
    assertOnImeThread();
    mShouldUpdateExtractedText = (flags & GET_EXTRACTED_TEXT_MONITOR) > 0;
    if (mShouldUpdateExtractedText) {
        mCurrentExtractedTextRequestToken = request != null ? request.token : 0;
    }
    TextInputState textInputState = requestAndWaitForTextInputState();
    return convertToExtractedText(textInputState);
}
 

private int getCursorPosition() {
    ExtractedText extracted = inputConnection.getExtractedText(
            new ExtractedTextRequest(), 0);
    if (extracted == null) {
        return -1;
    }
    return extracted.startOffset + extracted.selectionStart;
}
 

public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (mTextView != null) {
        ExtractedText et = new ExtractedText();
        if (mTextView.extractText(request, et)) {
            if ((flags&GET_EXTRACTED_TEXT_MONITOR) != 0) {
                mTextView.setExtracting(request);
            }
            return et;
        }
    }
    return null;
}
 

@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (Display.isInitialized() && Display.getInstance().getCurrent() != null) {
        this.request = request;
        ExtractedText et = new ExtractedText();
        if (extractText(request, et)) {
            return et;
        }
    }
    return null;
}
 

boolean extractTextInternal(ExtractedTextRequest request, ExtractedText outText) {

        Component txtCmp = Display.getInstance().getCurrent().getFocused();
        if (txtCmp != null && txtCmp instanceof TextField) {
            String txt = ((TextField) txtCmp).getText();
            int partialStartOffset = -1;
            int partialEndOffset = -1;
            final CharSequence content = txt;
            if (content != null) {
                final int N = content.length();
                outText.partialStartOffset = outText.partialEndOffset = -1;
                partialStartOffset = 0;
                partialEndOffset = N;

                if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) {
                    outText.text = content.subSequence(partialStartOffset,
                            partialEndOffset);
                } else {
                    outText.text = TextUtils.substring(content, partialStartOffset,
                            partialEndOffset);
                }

                outText.flags = 0;
                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
                outText.startOffset = 0;
                outText.selectionStart = Selection.getSelectionStart(content);
                outText.selectionEnd = Selection.getSelectionEnd(content);
                return true;
            }

        }
        return false;
    }
 

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);
    }
}
 

@Override
public boolean extractText(@NonNull ExtractedTextRequest request, @NonNull ExtractedText outText) {
    try {
        return super.extractText(request, outText);
    } catch (IndexOutOfBoundsException ex) {
        Log.d(TAG, "extractText hit IndexOutOfBoundsException. This may be normal.", ex);
        return false;
    }
}
 

/**
 * @see BaseInputConnection#getExtractedText(android.view.inputmethod.ExtractedTextRequest,
 *                                           int)
 */
@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (DEBUG) Log.w(TAG, "getExtractedText");
    ExtractedText et = new ExtractedText();
    Editable editable = getEditable();
    et.text = editable.toString();
    et.partialEndOffset = editable.length();
    et.selectionStart = Selection.getSelectionStart(editable);
    et.selectionEnd = Selection.getSelectionEnd(editable);
    et.flags = mSingleLine ? ExtractedText.FLAG_SINGLE_LINE : 0;
    return et;
}
 

/**
 * @see BaseInputConnection#getExtractedText(android.view.inputmethod.ExtractedTextRequest,
 *                                           int)
 */
@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
    if (DEBUG) Log.w(TAG, "getExtractedText");
    ExtractedText et = new ExtractedText();
    Editable editable = getEditable();
    et.text = editable.toString();
    et.partialEndOffset = editable.length();
    et.selectionStart = Selection.getSelectionStart(editable);
    et.selectionEnd = Selection.getSelectionEnd(editable);
    et.flags = mSingleLine ? ExtractedText.FLAG_SINGLE_LINE : 0;
    return et;
}
 

/**
 * Place the cursor on the next occurance of a symbol
 * 
 * @param con
 *          driver
 * @param symbol
 *          the symbol to jump to
 */
private void jumpForward(InputConnection con, int symbol) {
	ExtractedText txt = con.getExtractedText(new ExtractedTextRequest(), 0);
	if (txt != null) {
		int pos = txt.text.toString().indexOf(symbol, txt.selectionEnd + 1);
		if (pos == -1) {
			pos = txt.text.length();
		}
		con.setSelection(pos, pos);
	}
}