/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtQml 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 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
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** 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 "qaccessiblequickview.h"

#include <QtGui/qguiapplication.h>

#include <QtQuick/qquickitem.h>
#include <QtQuick/private/qquickitem_p.h>

#include "qaccessiblequickitem.h"
#include "qqmlaccessible.h"

#ifndef QT_NO_ACCESSIBILITY

QT_BEGIN_NAMESPACE

QAccessibleQuickWindow::QAccessibleQuickWindow(QQuickWindow *object)
    :QAccessibleObject(object)
{
}

QQuickItem *QAccessibleQuickWindow::rootItem() const
{
    if (window()->contentItem())
        return window()->contentItem()->childItems().first();
    return 0;
}

int QAccessibleQuickWindow::childCount() const
{
    return rootItem() ? 1 : 0;
}

QAccessibleInterface *QAccessibleQuickWindow::parent() const
{
    // FIXME: for now we assume to be a top level window...
    return QAccessible::queryAccessibleInterface(qApp);
}

QAccessibleInterface *QAccessibleQuickWindow::child(int index) const
{
    if (index == 0) {
        if (QQuickItem *declarativeRoot = rootItem())
            return new QAccessibleQuickItem(declarativeRoot);
    }
    return 0;
}

QAccessible::Role QAccessibleQuickWindow::role() const
{
    return QAccessible::Window; // FIXME
}

QAccessible::State QAccessibleQuickWindow::state() const
{
    QAccessible::State st;
    if (window() == QGuiApplication::focusWindow())
        st.active = true;
    if (!window()->isVisible())
        st.invisible = true;
    return st;
}

QRect QAccessibleQuickWindow::rect() const
{
    return QRect(window()->x(), window()->y(), window()->width(), window()->height());
}

QString QAccessibleQuickWindow::text(QAccessible::Text text) const
{
#ifdef Q_ACCESSIBLE_QUICK_ITEM_ENABLE_DEBUG_DESCRIPTION
    if (text == QAccessible::DebugDescription) {
        return QString::fromLatin1(object()->metaObject()->className()) ;
    }
#else
    Q_UNUSED(text)
#endif
    return window()->title();
}


/*!
  \internal

  Can also return \a item itself
  */
static QQuickItem *childAt_helper(QQuickItem *item, int x, int y)
{
    if (!item->isVisible() || !item->isEnabled())
        return 0;

    if (item->flags() & QQuickItem::ItemClipsChildrenToShape) {
        if (!itemScreenRect(item).contains(x, y))
            return 0;
    }

    QScopedPointer<QAccessibleInterface> accessibleInterface(QAccessible::queryAccessibleInterface(item));
    // this item has no Accessible attached property
    if (!accessibleInterface)
        return 0;

    if (accessibleInterface->childCount() == 0) {
        return (itemScreenRect(item).contains(x, y)) ? item : 0;
    }

    QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);

    QList<QQuickItem *> children = itemPrivate->paintOrderChildItems();
    for (int i = children.count() - 1; i >= 0; --i) {
        QQuickItem *child = children.at(i);
        if (QQuickItem *childChild = childAt_helper(child, x, y))
            return childChild;
    }

    QRect screenRect = itemScreenRect(item);

    if (screenRect.contains(x, y))
        return item;

    return 0;
}

QAccessibleInterface *QAccessibleQuickWindow::childAt(int x, int y) const
{
    Q_ASSERT(window());
    QQuickItem *root = rootItem();
    if (root) {
        if (QQuickItem *item = childAt_helper(root, x, y))
            return QAccessible::queryAccessibleInterface(item);
        return QAccessible::queryAccessibleInterface(root);
    }
    return 0;
}

int QAccessibleQuickWindow::indexOfChild(const QAccessibleInterface *iface) const
{
    if (iface) {
        QQuickItem *declarativeRoot = rootItem();
        if (declarativeRoot == iface->object())
            return 0;
    }
    return -1;
}

QT_END_NAMESPACE

#endif // QT_NO_ACCESSIBILITY
