/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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
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** use the contact form at http://qt.digia.com/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 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
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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****************************************************************************/

#ifndef QTWEBKITHELPVIEWER_H
#define QTWEBKITHELPVIEWER_H

#include "helpviewer.h"

#ifndef QT_NO_WEBKIT

#include <QWebPage>
#include <QWebView>

namespace Help {
namespace Internal {

class HelpPage;
class QtWebKitHelpWidget;

class QtWebKitHelpViewer : public HelpViewer
{
    Q_OBJECT
public:
    explicit QtWebKitHelpViewer(qreal zoom, QWidget *parent = 0);
    ~QtWebKitHelpViewer() { }

    QFont viewerFont() const;
    void setViewerFont(const QFont &font);

    qreal scale() const;

    QString title() const;

    QUrl source() const;
    void setSource(const QUrl &url);
    void scrollToAnchor(const QString &anchor);
    void highlightId(const QString &id);

    void setHtml(const QString &html);

    QString selectedText() const;
    bool isForwardAvailable() const;
    bool isBackwardAvailable() const;
    void addBackHistoryItems(QMenu *backMenu);
    void addForwardHistoryItems(QMenu *forwardMenu);
    void setOpenInNewWindowActionVisible(bool visible);

    bool findText(const QString &text, Core::FindFlags flags,
        bool incremental, bool fromSearch, bool *wrapped = 0);

    HelpPage *page() const;

public slots:
    void scaleUp();
    void scaleDown();
    void resetScale();
    void copy();
    void stop();
    void forward();
    void backward();
    void print(QPrinter *printer);

private slots:
    void goToBackHistoryItem();
    void goToForwardHistoryItem();
    void goToHistoryItem(bool forward);

private:
    QString m_oldHighlightId;
    QString m_oldHighlightStyle;
    QtWebKitHelpWidget *m_webView;
};

class QtWebKitHelpWidget : public QWebView
{
    Q_OBJECT

public:
    explicit QtWebKitHelpWidget(qreal zoom, QtWebKitHelpViewer *parent = 0);
    ~QtWebKitHelpWidget();

    void scaleUp();
    void scaleDown();

public slots:
    void copy();

signals:
    void forwardAvailable(bool enabled);
    void backwardAvailable(bool enabled);

protected:
    void keyPressEvent(QKeyEvent *e);
    void wheelEvent(QWheelEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);

private slots:
    void actionChanged();
    void slotNetworkReplyFinished(QNetworkReply *reply);

private:
    bool eventFilter(QObject *obj, QEvent *event);

    QtWebKitHelpViewer *m_parent;
};

class HelpPage : public QWebPage
{
    Q_OBJECT
public:
    HelpPage(QObject *parent);

protected:
    virtual QWebPage *createWindow(QWebPage::WebWindowType);
    virtual void triggerAction(WebAction action, bool checked = false);

    virtual bool acceptNavigationRequest(QWebFrame *frame,
        const QNetworkRequest &request, NavigationType type);

private slots:
    void onHandleUnsupportedContent(QNetworkReply *reply);

private:
    QUrl m_loadingUrl;
    bool closeNewTabIfNeeded;

    friend class Help::Internal::QtWebKitHelpWidget;
    Qt::MouseButtons m_pressedButtons;
    Qt::KeyboardModifiers m_keyboardModifiers;
};

}   // namespace Internal
}   // namespace Help

#endif // !QT_NO_WEBKIT

#endif // QTWEBKITHELPVIEWER_H