/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
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** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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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
** 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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****************************************************************************/

#ifndef HELPWIDGET_H
#define HELPWIDGET_H

#include <coreplugin/icontext.h>

#include <qglobal.h>
#include <QWidget>

QT_BEGIN_NAMESPACE
class QAction;
class QComboBox;
class QFont;
class QMenu;
class QPrinter;
class QStackedWidget;
QT_END_NAMESPACE

namespace Help {
namespace Internal {

class HelpViewer;

class HelpWidget : public QWidget
{
    Q_OBJECT
public:
    enum WidgetStyle {
        ModeWidget,
        SideBarWidget,
        ExternalWindow
    };

    HelpWidget(const Core::Context &context, WidgetStyle style, QWidget *parent = 0);
    ~HelpWidget();

    HelpViewer *currentViewer() const;
    void setCurrentViewer(HelpViewer *viewer);
    int currentIndex() const;
    void addViewer(HelpViewer *viewer, bool highlightSearchTerms = false);
    void removeViewerAt(int index);

    void setViewerFont(const QFont &font);

    // so central widget can save the state
    int viewerCount() const;
    HelpViewer *viewerAt(int index) const;

public slots:
    void setSource(const QUrl &url);
    void setSourceFromSearch(const QUrl &url);
    void updateCloseButton();

protected:
    void closeEvent(QCloseEvent *);

signals:
    void openHelpMode(const QUrl &url);
    void closeButtonClicked();
    void aboutToClose();
    void sourceChanged(const QUrl &url);
    void filterActivated(const QString &name);

private slots:
    void updateBackMenu();
    void updateForwardMenu();
    void updateWindowTitle();
    void helpModeButtonClicked();

private:
    void goHome();
    void addBookmark();
    void copy();
    void forward();
    void backward();
    void scaleUp();
    void scaleDown();
    void resetScale();
    void print(HelpViewer *viewer);
    void highlightSearchTerms();

    Core::IContext *m_context;
    WidgetStyle m_style;
    QAction *m_switchToHelp;
    QAction *m_homeAction;
    QMenu *m_backMenu;
    QMenu *m_forwardMenu;
    QAction *m_backAction;
    QAction *m_forwardAction;
    QAction *m_addBookmarkAction;
    QComboBox *m_filterComboBox;
    QAction *m_closeAction;
    QAction *m_scaleUp;
    QAction *m_scaleDown;
    QAction *m_resetScale;
    QAction *m_printAction;
    QAction *m_copy;

    QStackedWidget *m_viewerStack;
    QPrinter *m_printer;
};

} // Internal
} // Help

#endif // HELPWIDGET_H