/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtGui module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
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** 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
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****************************************************************************/

#include <qcursor.h>
#include <private/qcursor_p.h>
#include <qplatformcursor_qpa.h>
#include <qbitmap.h>

QT_BEGIN_NAMESPACE

QT_USE_NAMESPACE

#ifndef QT_NO_CURSOR

static int nextCursorId = Qt::BitmapCursor;

/*****************************************************************************
  Internal QCursorData class
 *****************************************************************************/

QCursorData::QCursorData(Qt::CursorShape s)
    : cshape(s), bm(0), bmm(0), hx(0), hy(0), id(s)
{
    ref = 1;
}

QCursorData::~QCursorData()
{
    delete bm;
    delete bmm;
}


/*****************************************************************************
  Global cursors
 *****************************************************************************/

extern QCursorData *qt_cursorTable[Qt::LastCursor + 1]; // qcursor.cpp

int QCursor::handle() const
{
    return d->id;
}


QCursorData *QCursorData::setBitmap(const QBitmap &bitmap, const QBitmap &mask, int hotX, int hotY)
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    if (bitmap.depth() != 1 || mask.depth() != 1 || bitmap.size() != mask.size()) {
        qWarning("QCursor: Cannot create bitmap cursor; invalid bitmap(s)");
        QCursorData *c = qt_cursorTable[0];
        c->ref.ref();
        return c;
    }
    QCursorData *d = new QCursorData;
    d->bm  = new QBitmap(bitmap);
    d->bmm = new QBitmap(mask);
    d->cshape = Qt::BitmapCursor;
    d->id = ++nextCursorId;
    d->hx = hotX >= 0 ? hotX : bitmap.width() / 2;
    d->hy = hotY >= 0 ? hotY : bitmap.height() / 2;

    return d;
}

void QCursorData::update()
{
}

#endif //QT_NO_CURSOR

extern int qt_last_x,qt_last_y;

QPoint QCursor::pos()
{
    QList<QWeakPointer<QPlatformCursor> > cursors = QPlatformCursorPrivate::getInstances();
    int cursorCount = cursors.count();
    for (int i = 0; i < cursorCount; ++i) {
        const QWeakPointer<QPlatformCursor> &cursor(cursors.at(i));
        if (cursor)
            return cursor.data()->pos();
    }
    return QPoint(qt_last_x, qt_last_y);
}

void QCursor::setPos(int x, int y)
{
    QPoint target(x, y);

    // Need to check, since some X servers generate null mouse move
    // events, causing looping in applications which call setPos() on
    // every mouse move event.
    //
    if (pos() == target)
        return;

    QList<QWeakPointer<QPlatformCursor> > cursors = QPlatformCursorPrivate::getInstances();
    int cursorCount = cursors.count();
    for (int i = 0; i < cursorCount; ++i) {
        const QWeakPointer<QPlatformCursor> &cursor(cursors.at(i));
        if (cursor)
            cursor.data()->setPos(target);
    }
}

QT_END_NAMESPACE