/*
 * This file is part of the KDE project.
 *
 * Copyright (C) 2007 Trolltech ASA
 * Copyright (C) 2008 Urs Wolfer <uwolfer @ kde.org>
 * Copyright (C) 2008 Laurent Montel <montel@kde.org>
 * Copyright (C) 2008 Michael Howell <mhowell123@gmail.com>
 * Copyright (C) 2009 Dawit Alemayehu <adawit @ kde.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef KWEBVIEW_P_H
#define KWEBVIEW_P_H

#include <QtCore/QEvent>
#include <QtGui/QClipboard>
#include <QtGui/QApplication>
#include <QtWebKit/QWebFrame>
#include <QtWebKit/QWebElement>

#include <kurl.h>
#include <kurifilter.h>

#include "kwebpage.h"

#define QL1S(x)   QLatin1String(x)

template <class T>
class KWebViewPrivate
{
public:
    KWebViewPrivate(T *parent)
    : q(parent),
      keyboardModifiers(Qt::NoModifier) ,
      pressedButtons(Qt::NoButton)
    {
    }

    bool isExternalContentAllowed()
    {
        KWebPage *webPage = qobject_cast<KWebPage*>(q->page());
        if (webPage) {
            return webPage->isExternalContentAllowed();
        }

        return false;
    }

    void setAllowExternalContent(bool allow)
    {
        KWebPage *webPage = qobject_cast<KWebPage*>(q->page());
        if (webPage) {
            webPage->setAllowExternalContent(allow);
        }
    }

    bool wheelEvent(int delta)
    {
        if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
            const int numDegrees = delta / 8;
            const int numSteps = numDegrees / 15;
            q->setZoomFactor(q->zoomFactor() + numSteps * 0.1);
            return true;
        }

        return false;
    }

    bool mouseReleased(const QPoint &pos)
    {
        hitTest = q->page()->mainFrame()->hitTestContent(pos);
        const QUrl url = hitTest.linkUrl();

        if (!url.isEmpty()) {
            if ((pressedButtons & Qt::MidButton) ||
                ((pressedButtons & Qt::LeftButton) && (keyboardModifiers & Qt::ControlModifier))) {
                emit q->linkMiddleOrCtrlClicked(url);
                return true;
            }

            if ((pressedButtons & Qt::LeftButton) && (keyboardModifiers & Qt::ShiftModifier)) {
                emit q->linkShiftClicked(url);
                return true;
            }
        }

        return false;
    }

    bool handleUrlPasteFromClipboard(QEvent* event)
    {
        QWebPage *page = q->page();
        if ((pressedButtons & Qt::MidButton) && page) {

            // WORKAROUND: Let the page handle the event first so that middle clicking
            // on scroll bars does not cause navigation to a url that might have been
            // copied into the selection clipboard.
            page->event(event);
            if (event->isAccepted())
                return true;

            if (!hitTest.linkUrl().isValid() && !hitTest.isContentEditable() && !page->isModified()) {
                QString subType (QL1S("plain"));
                const QString clipboardText = QApplication::clipboard()->text(subType, QClipboard::Selection);
                if (!clipboardText.isEmpty()) {
                    KUriFilterData data (clipboardText.left(250).trimmed());
                    data.setCheckForExecutables(false); // don't allow executables...
                    if (KUriFilter::self()->filterUri(data, QStringList(QL1S("kshorturifilter")))) {
                        switch (data.uriType()) {
                        case KUriFilterData::LocalFile:
                        case KUriFilterData::LocalDir:
                        case KUriFilterData::NetProtocol:
                            emit q->selectionClipboardUrlPasted(data.uri(), QString());
#ifndef KDE_NO_DEPRECATED
                            emit q->selectionClipboardUrlPasted(data.uri());
#endif
                            return true;
                        default:
                            break;
                        }
                    } else if (KUriFilter::self()->filterSearchUri(data, KUriFilter::NormalTextFilter)) {
                        emit q->selectionClipboardUrlPasted(data.uri(), clipboardText);
#ifndef KDE_NO_DEPRECATED
                        emit q->selectionClipboardUrlPasted(data.uri());
#endif
                        return true;
                    }
                }
            }
        }

        return false;
    }

    T *q;
    Qt::KeyboardModifiers keyboardModifiers;
    Qt::MouseButtons pressedButtons;
    QWebHitTestResult hitTest;
};

#endif  // KWEBVIEW_P_H