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**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of Qt Creator.
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** accordance with the commercial license agreement provided with the
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
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****************************************************************************/

#ifndef TEXTBROWSERHELPVIEWER_H
#define TEXTBROWSERHELPVIEWER_H

#include "centralwidget.h"
#include "helpviewer.h"
#include "openpagesmanager.h"

#include <QTextBrowser>

namespace Help {
namespace Internal {

class TextBrowserHelpWidget;

class TextBrowserHelpViewer : public HelpViewer
{
    Q_OBJECT

public:
    explicit TextBrowserHelpViewer(qreal zoom, QWidget *parent = 0);
    ~TextBrowserHelpViewer();

    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 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);

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

private slots:
    void goToHistoryItem();

private:
    QVariant loadResource(int type, const QUrl &name);

    TextBrowserHelpWidget *m_textBrowser;
};

class TextBrowserHelpWidget : public QTextBrowser
{
    Q_OBJECT

public:
    TextBrowserHelpWidget(int zoom, TextBrowserHelpViewer *parent);

    QVariant loadResource(int type, const QUrl &name);

    bool hasAnchorAt(const QPoint& pos);
    void openLink(bool newPage);
    void scaleUp();
    void scaleDown();

public slots:
    void openLink();
    void openLinkInNewPage();

protected:
    void contextMenuEvent(QContextMenuEvent *event);
    bool eventFilter(QObject *obj, QEvent *event);
    void wheelEvent(QWheelEvent *e);
    void mousePressEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);

public:
    int zoomCount;
    bool forceFont;
    QString lastAnchor;
    bool showOpenInNewWindowAction;
    TextBrowserHelpViewer *m_parent;
};

}   // namespace Internal
}   // namespace Help

#endif // TEXTBROWSERHELPVIEWER_H