/****************************************************************************
**
** Copyright (C) 2012 BogDan Vatra <bogdan@kde.org>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef ANDROIDINPUTCONTEXT_H
#define ANDROIDINPUTCONTEXT_H

#include <qpa/qplatforminputcontext.h>
#include <jni.h>
#include <qevent.h>

QT_BEGIN_NAMESPACE

class QAndroidInputContext: public QPlatformInputContext
{
    Q_OBJECT
    enum CapsMode
    {
        CAP_MODE_CHARACTERS = 0x00001000,
        CAP_MODE_SENTENCES  = 0x00004000,
        CAP_MODE_WORDS      = 0x00002000
    };

public:
    struct ExtractedText
    {
        ExtractedText() { clear(); }

        void clear()
        {
            partialEndOffset = partialStartOffset = selectionEnd = selectionStart = startOffset = -1;
            text.clear();
        }

        int partialEndOffset;
        int partialStartOffset;
        int selectionEnd;
        int selectionStart;
        int startOffset;
        QString text;
    };

public:
    QAndroidInputContext();
    ~QAndroidInputContext();
    bool isValid() const { return true; }

    void reset();
    void commit();
    void update(Qt::InputMethodQueries queries);
    void invokeAction(QInputMethod::Action action, int cursorPosition);
    QRectF keyboardRect() const;
    bool isAnimating() const;
    void showInputPanel();
    void hideInputPanel();
    bool isInputPanelVisible() const;

    bool isComposing() const;
    void clear();

    //---------------//
    jboolean commitText(const QString &text, jint newCursorPosition);
    jboolean deleteSurroundingText(jint leftLength, jint rightLength);
    jboolean finishComposingText();
    jint getCursorCapsMode(jint reqModes);
    const ExtractedText &getExtractedText(jint hintMaxChars, jint hintMaxLines, jint flags);
    QString getSelectedText(jint flags);
    QString getTextAfterCursor(jint length, jint flags);
    QString getTextBeforeCursor(jint length, jint flags);
    jboolean setComposingText(const QString &text, jint newCursorPosition);
    jboolean setComposingRegion(jint start, jint end);
    jboolean setSelection(jint start, jint end);
    jboolean selectAll();
    jboolean cut();
    jboolean copy();
    jboolean copyURL();
    jboolean paste();

private:
    QSharedPointer<QInputMethodQueryEvent> focusObjectInputMethodQuery(Qt::InputMethodQueries queries = Qt::ImQueryAll);
    void sendInputMethodEvent(QInputMethodEvent *event);

private slots:
    virtual void sendEvent(QObject *receiver, QInputMethodEvent *event);
    virtual void sendEvent(QObject *receiver, QInputMethodQueryEvent *event);
    void updateCursorPosition();

private:
    ExtractedText m_extractedText;
    QString m_composingText;
    QMetaObject::Connection m_updateCursorPosConnection;
    bool m_blockUpdateSelection;
};

QT_END_NAMESPACE

#endif // ANDROIDINPUTCONTEXT_H