/*
    Copyright (c) 2012, BogDan Vatra <bogdan@kde.org>
    Contact: http://www.qt-project.org/legal

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

    1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package org.qtproject.qt5.android;

import android.content.Context;
import android.content.Intent;
import android.text.Editable;
import android.text.InputFilter;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.BaseInputConnection;
import android.view.inputmethod.CompletionInfo;
import android.view.inputmethod.ExtractedText;
import android.view.inputmethod.ExtractedTextRequest;
import android.view.inputmethod.InputMethodManager;

class QtExtractedText
{
    public int partialEndOffset;
    public int partialStartOffset;
    public int selectionEnd;
    public int selectionStart;
    public int startOffset;
    public String text;
}

class QtNativeInputConnection
{
    static native boolean commitText(String text, int newCursorPosition);
    static native boolean commitCompletion(String text, int position);
    static native boolean deleteSurroundingText(int leftLength, int rightLength);
    static native boolean finishComposingText();
    static native int getCursorCapsMode(int reqModes);
    static native QtExtractedText getExtractedText(int hintMaxChars, int hintMaxLines, int flags);
    static native String getSelectedText(int flags);
    static native String getTextAfterCursor(int length, int flags);
    static native String getTextBeforeCursor(int length, int flags);
    static native boolean setComposingText(String text, int newCursorPosition);
    static native boolean setSelection(int start, int end);
    static native boolean selectAll();
    static native boolean cut();
    static native boolean copy();
    static native boolean copyURL();
    static native boolean paste();
}

public class QtInputConnection extends BaseInputConnection
{
    private static final int ID_SELECT_ALL = android.R.id.selectAll;
    private static final int ID_START_SELECTING_TEXT = android.R.id.startSelectingText;
    private static final int ID_STOP_SELECTING_TEXT = android.R.id.stopSelectingText;
    private static final int ID_CUT = android.R.id.cut;
    private static final int ID_COPY = android.R.id.copy;
    private static final int ID_PASTE = android.R.id.paste;
    private static final int ID_COPY_URL = android.R.id.copyUrl;
    private static final int ID_SWITCH_INPUT_METHOD = android.R.id.switchInputMethod;
    private static final int ID_ADD_TO_DICTIONARY = android.R.id.addToDictionary;
    View m_view;

    public QtInputConnection(View targetView)
    {
        super(targetView, true);
        m_view = targetView;
    }

    @Override
    public boolean beginBatchEdit()
    {
        return true;
    }

    @Override
    public boolean endBatchEdit()
    {
        return true;
    }

    @Override
    public boolean commitCompletion(CompletionInfo text)
    {
        return QtNativeInputConnection.commitCompletion(text.getText().toString(), text.getPosition());
    }

    @Override
    public boolean commitText(CharSequence text, int newCursorPosition)
    {
        return QtNativeInputConnection.commitText(text.toString(), newCursorPosition);
    }

    @Override
    public boolean deleteSurroundingText(int leftLength, int rightLength)
    {
        return QtNativeInputConnection.deleteSurroundingText(leftLength, rightLength);
    }

    @Override
    public boolean finishComposingText()
    {
        return QtNativeInputConnection.finishComposingText();
    }

    @Override
    public int getCursorCapsMode(int reqModes)
    {
        return QtNativeInputConnection.getCursorCapsMode(reqModes);
    }

    @Override
    public ExtractedText getExtractedText(ExtractedTextRequest request, int flags)
    {
        QtExtractedText qExtractedText = QtNativeInputConnection.getExtractedText(request.hintMaxChars, request.hintMaxLines, flags);
        ExtractedText extractedText = new ExtractedText();
        extractedText.partialEndOffset = qExtractedText.partialEndOffset;
        extractedText.partialStartOffset = qExtractedText.partialStartOffset;
        extractedText.selectionEnd = qExtractedText.selectionEnd;
        extractedText.selectionStart = qExtractedText.selectionStart;
        extractedText.startOffset = qExtractedText.startOffset;
        extractedText.text = qExtractedText.text;
        return extractedText;
    }

    public CharSequence getSelectedText(int flags)
    {
        return QtNativeInputConnection.getSelectedText(flags);
    }

    @Override
    public CharSequence getTextAfterCursor(int length, int flags)
    {
        return QtNativeInputConnection.getTextAfterCursor(length, flags);
    }

    @Override
    public CharSequence getTextBeforeCursor(int length, int flags)
    {
        return QtNativeInputConnection.getTextBeforeCursor(length, flags);
    }

    @Override
    public boolean performContextMenuAction(int id)
    {
        switch (id) {
        case ID_SELECT_ALL:
            return QtNativeInputConnection.selectAll();
        case ID_COPY:
            return QtNativeInputConnection.copy();
        case ID_COPY_URL:
            return QtNativeInputConnection.copyURL();
        case ID_CUT:
            return QtNativeInputConnection.cut();
        case ID_PASTE:
            return QtNativeInputConnection.paste();

        case ID_SWITCH_INPUT_METHOD:
            InputMethodManager imm = (InputMethodManager)m_view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            if (imm != null) {
                imm.showInputMethodPicker();
            }
            return true;

        case ID_ADD_TO_DICTIONARY:
// TODO
//            String word = m_editable.subSequence(0, m_editable.length()).toString();
//            if (word != null) {
//                Intent i = new Intent("com.android.settings.USER_DICTIONARY_INSERT");
//                i.putExtra("word", word);
//                i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
//                m_view.getContext().startActivity(i);
//            }
            return true;
        }
        return super.performContextMenuAction(id);
    }

    @Override
    public boolean setComposingText(CharSequence text, int newCursorPosition) {
        return QtNativeInputConnection.setComposingText(text.toString(), newCursorPosition);
    }

    @Override
    public boolean setSelection(int start, int end) {
        return QtNativeInputConnection.setSelection(start, end);
    }
}