/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QWAYLANDINPUTMETHODCONTEXT_P_H
#define QWAYLANDINPUTMETHODCONTEXT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/qpa/qplatforminputcontext.h>
#include <QtGui/qevent.h>
#include <QtCore/qlocale.h>
#include <QtCore/qpointer.h>

#include <QtWaylandClient/private/qwayland-qt-text-input-method-unstable-v1.h>

QT_BEGIN_NAMESPACE

namespace QtWaylandClient {
    class QWaylandDisplay;

class QWaylandTextInputMethod : public QtWayland::qt_text_input_method_v1
{
public:
    QWaylandTextInputMethod(QWaylandDisplay *display, struct ::qt_text_input_method_v1 *textInputMethod);
    ~QWaylandTextInputMethod() override;

    void text_input_method_v1_visible_changed(int32_t visible) override;
    void text_input_method_v1_enter(struct ::wl_surface *surface) override;
    void text_input_method_v1_leave(struct ::wl_surface *surface) override;
    void text_input_method_v1_locale_changed(const QString &localeName) override;
    void text_input_method_v1_input_direction_changed(int32_t inputDirection) override;
    void text_input_method_v1_keyboard_rectangle_changed(wl_fixed_t x, wl_fixed_t y, wl_fixed_t width, wl_fixed_t height) override;
    void text_input_method_v1_key(int32_t type, int32_t key, int32_t modifiers, int32_t autoRepeat, int32_t count, int32_t nativeScanCode, int32_t nativeVirtualKey, int32_t nativeModifiers, const QString &text) override;
    void text_input_method_v1_start_input_method_event(uint32_t serial, int32_t surrounding_text_offset) override;
    void text_input_method_v1_end_input_method_event(uint32_t serial, const QString &commitString, const QString &preeditString, int32_t replacementStart, int32_t replacementLength) override;
    void text_input_method_v1_input_method_event_attribute(uint32_t serial, int32_t type, int32_t start, int32_t length, const QString &value) override;

    inline bool isVisible() const
    {
        return m_isVisible;
    }

    inline QRectF keyboardRect() const
    {
        return m_keyboardRect;
    }

    inline QLocale locale() const
    {
        return m_locale;
    }

    inline Qt::LayoutDirection inputDirection() const
    {
        return m_layoutDirection;
    }

    void sendInputState(QInputMethodQueryEvent *state, Qt::InputMethodQueries queries = Qt::ImQueryInput);

private:
    QWaylandDisplay *m_display;

    QHash<int, QList<QInputMethodEvent::Attribute> > m_pendingInputMethodEvents;
    QHash<int,int> m_offsetFromCompositor;

    struct ::wl_surface *m_surface;

    // Cached state
    bool m_isVisible = false;
    QRectF m_keyboardRect;
    QLocale m_locale;
    Qt::LayoutDirection m_layoutDirection;
};

class QWaylandInputMethodContext : public QPlatformInputContext
{
public:
    QWaylandInputMethodContext(QWaylandDisplay *display);
    ~QWaylandInputMethodContext() override;

    bool isValid() const override;
    void reset() override;
    void commit() override;
    void update(Qt::InputMethodQueries) override;
    void invokeAction(QInputMethod::Action, int cursorPosition) override;
    void showInputPanel() override;
    void hideInputPanel() override;

    bool isInputPanelVisible() const override;
    QRectF keyboardRect() const override;
    QLocale locale() const override;
    Qt::LayoutDirection inputDirection() const override;

    void setFocusObject(QObject *object) override;

private:
    QWaylandTextInputMethod *textInputMethod() const;

    QWaylandDisplay *m_display;
    QPointer<QWindow> m_currentWindow;
};

} // QtWaylandClient

QT_END_NAMESPACE

#endif // QWAYLANDINPUTMETHODCONTEXT_P_H