/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include "webhtmltabbednavigation.h"

#include "qwebpage.h"

#include "qwebframe.h"

#include "qwebelement.h"

#include <QDebug>

namespace WRT {

/*!

    \class WebHtmlTabIndexedNavigation

    \since cwrt 1.0

    \brief cwrt navigation.

    \sa WebNavigation, WebTouchNavigation, WebCursorNavigation, WebDirectionalNavigation

*/

WebHtmlTabIndexedNavigation::WebHtmlTabIndexedNavigation(QWebPage* webPage,QObject* view) : m_webPage(webPage)

, m_view(view)

, m_radioKeyPressed(Qt::Key_Down)

, m_radioGroupFocused(false)

{

    install();

}

/*!

*/

WebHtmlTabIndexedNavigation::~WebHtmlTabIndexedNavigation() 

{

    uninstall();

}

void WebHtmlTabIndexedNavigation::install()

{

    m_view->installEventFilter(this);

}

void WebHtmlTabIndexedNavigation::uninstall()

{

    m_view->removeEventFilter(this);

}

bool WebHtmlTabIndexedNavigation::eventFilter(QObject *object, QEvent *event)

{

    if (object == m_view) {

        switch (event->type()) {

            case QEvent::KeyPress: {

                QKeyEvent* ev = static_cast<QKeyEvent*>(event);

                keyPressEvent(ev);

                return ev->isAccepted();

            }

            case QEvent::KeyRelease: {

                QKeyEvent* ev = static_cast<QKeyEvent*>(event);

                keyReleaseEvent(ev);

                return ev->isAccepted();

            }

            default:

                break;

        }

    }

    return false;

}

/*!

    If the key is directional up or left sends a tab key press with a shift modifier to QWebPage

    If the key is directional right or down sends a tab key press with out a shift modifer to QWebPage

    Otherwise sends the key press event to QWebPage

*/

void WebHtmlTabIndexedNavigation::keyPressEvent(QKeyEvent* ev)

{

    switch (ev->key()) {

    case Qt::Key_Up:

    case Qt::Key_Left: {

        QKeyEvent tabEvent(QEvent::KeyPress, Qt::Key_Tab, Qt::ShiftModifier);

        m_webPage->event(&tabEvent);

    }

    break;

    case Qt::Key_Down:

    case Qt::Key_Right: {

        QKeyEvent tabEvent(QEvent::KeyPress, Qt::Key_Tab, Qt::NoModifier);

        m_webPage->event(&tabEvent);

    }

    break;

    case Qt::Key_Return:

    case Qt::Key_Enter:

    case Qt::Key_Select: {

        QWebElement webElement = m_webPage->mainFrame()->findFirstElement(":focus");

        QString attribute = webElement.attribute("type");

        if (attribute.toLower().compare("checkbox")==0) {

            QKeyEvent spaceEvent(QEvent::KeyPress, Qt::Key_Space, Qt::NoModifier);

            m_webPage->event(&spaceEvent);

        } else if (attribute.toLower().compare("radio")==0) {

            m_radioKeyPressed = (m_radioGroupFocused) ? Qt::Key_Down : Qt::Key_Up; 

            QKeyEvent keyevent(QEvent::KeyPress, m_radioKeyPressed, Qt::NoModifier);

            m_webPage->event(&keyevent);

            m_radioGroupFocused = (webElement.document().findFirst(":checked") != webElement) ? m_radioGroupFocused : !m_radioGroupFocused;

        } else if (webElement.tagName().toLower().compare("select")==0) {

            QKeyEvent keyevent(QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier);

            m_webPage->event(&keyevent);

        }

    }

    break;

    default:

        if (m_webPage)

            m_webPage->event(ev);

    break;

    };

}

/*!

    If the key is directional up or left sends a tab key release with a shift modifier to QWebPage

    If the key is directional right or down sends a tab key release with out a shift modifer to QWebPage

    Otherwise sends the key press event to QWebPage

*/

void WebHtmlTabIndexedNavigation::keyReleaseEvent(QKeyEvent* ev)

{

    switch (ev->key()) {

    case Qt::Key_Up:

    case Qt::Key_Left: {

        QKeyEvent tabEvent(QEvent::KeyRelease, Qt::Key_Tab, Qt::ShiftModifier);

        m_webPage->event(&tabEvent);

    }

    break;

    case Qt::Key_Down:

    case Qt::Key_Right: {

        QKeyEvent tabEvent(QEvent::KeyRelease, Qt::Key_Tab, Qt::NoModifier);

        m_webPage->event(&tabEvent);

    }

    break;

    case Qt::Key_Return:

    case Qt::Key_Enter:

    case Qt::Key_Select: {

        QWebElement webElement = m_webPage->mainFrame()->findFirstElement(":focus");

        QString attribute = webElement.attribute("type");

        if (attribute.toLower().compare("checkbox")==0) {

            QKeyEvent spaceEvent(QEvent::KeyRelease, Qt::Key_Space, Qt::NoModifier);

            m_webPage->event(&spaceEvent);

        } else if (attribute.toLower().compare("radio")==0 || attribute.toLower().compare("select")==0) {

            QKeyEvent keyevent(QEvent::KeyRelease, m_radioKeyPressed, Qt::NoModifier);

            m_webPage->event(&keyevent);

        } else if (webElement.tagName().toLower().compare("select")==0) {

            QKeyEvent keyevent(QEvent::KeyRelease, Qt::Key_Down, Qt::NoModifier);

            m_webPage->event(&keyevent);

        }

    }

    default:

        if (m_webPage)

            m_webPage->event(ev);

    break;

    };

}

}