/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef TABWIDGET_H
#define TABWIDGET_H

#include <QtWidgets/QTabBar>

#include <QtWidgets/QShortcut>
/*
    Tab bar with a few more features such as a context menu and shortcuts
 */
class TabBar : public QTabBar
{
    Q_OBJECT

signals:
    void newTab();
    void cloneTab(int index);
    void closeTab(int index);
    void closeOtherTabs(int index);
    void reloadTab(int index);
    void reloadAllTabs();
    void tabMoveRequested(int fromIndex, int toIndex);

public:
    TabBar(QWidget *parent = 0);

protected:
    void mousePressEvent(QMouseEvent* event);
    void mouseMoveEvent(QMouseEvent* event);

private slots:
    void selectTabAction();
    void cloneTab();
    void closeTab();
    void closeOtherTabs();
    void reloadTab();
    void contextMenuRequested(const QPoint &position);

private:
    QList<QShortcut*> m_tabShortcuts;
    friend class TabWidget;

    QPoint m_dragStartPos;
    int m_dragCurrentIndex;
};

#include <QWebPage>

QT_BEGIN_NAMESPACE
class QAction;
QT_END_NAMESPACE
class WebView;
/*!
    A proxy object that connects a single browser action
    to one child webpage action at a time.

    Example usage: used to keep the main window stop action in sync with
    the current tabs webview's stop action.
 */
class WebActionMapper : public QObject
{
    Q_OBJECT

public:
    WebActionMapper(QAction *root, QWebPage::WebAction webAction, QObject *parent);
    QWebPage::WebAction webAction() const;
    void addChild(QAction *action);
    void updateCurrent(QWebPage *currentParent);

private slots:
    void rootTriggered();
    void childChanged();
    void rootDestroyed();
    void currentDestroyed();

private:
    QWebPage *m_currentParent;
    QAction *m_root;
    QWebPage::WebAction m_webAction;
};

#include <QtCore/QUrl>
#include <QtWidgets/QTabWidget>
QT_BEGIN_NAMESPACE
class QCompleter;
class QLineEdit;
class QMenu;
class QStackedWidget;
QT_END_NAMESPACE
/*!
    TabWidget that contains WebViews and a stack widget of associated line edits.

    Connects up the current tab's signals to this class's signal and uses WebActionMapper
    to proxy the actions.
 */
class TabWidget : public QTabWidget
{
    Q_OBJECT

signals:
    // tab widget signals
    void loadPage(const QString &url);
    void tabsChanged();
    void lastTabClosed();

    // current tab signals
    void setCurrentTitle(const QString &url);
    void showStatusBarMessage(const QString &message);
    void linkHovered(const QString &link);
    void loadProgress(int progress);
    void geometryChangeRequested(const QRect &geometry);
    void menuBarVisibilityChangeRequested(bool visible);
    void statusBarVisibilityChangeRequested(bool visible);
    void toolBarVisibilityChangeRequested(bool visible);
    void printRequested(QWebFrame *frame);

public:
    TabWidget(QWidget *parent = 0);
    void clear();
    void addWebAction(QAction *action, QWebPage::WebAction webAction);

    QAction *newTabAction() const;
    QAction *closeTabAction() const;
    QAction *recentlyClosedTabsAction() const;
    QAction *nextTabAction() const;
    QAction *previousTabAction() const;

    QWidget *lineEditStack() const;
    QLineEdit *currentLineEdit() const;
    WebView *currentWebView() const;
    WebView *webView(int index) const;
    QLineEdit *lineEdit(int index) const;
    int webViewIndex(WebView *webView) const;

    QByteArray saveState() const;
    bool restoreState(const QByteArray &state);

protected:
    void mouseDoubleClickEvent(QMouseEvent *event);
    void contextMenuEvent(QContextMenuEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);

public slots:
    void loadUrlInCurrentTab(const QUrl &url);
    WebView *newTab(bool makeCurrent = true);
    void cloneTab(int index = -1);
    void closeTab(int index = -1);
    void closeOtherTabs(int index);
    void reloadTab(int index = -1);
    void reloadAllTabs();
    void nextTab();
    void previousTab();

private slots:
    void currentChanged(int index);
    void aboutToShowRecentTabsMenu();
    void aboutToShowRecentTriggeredAction(QAction *action);
    void webViewLoadStarted();
    void webViewIconChanged();
    void webViewTitleChanged(const QString &title);
    void webViewUrlChanged(const QUrl &url);
    void lineEditReturnPressed();
    void windowCloseRequested();
    void moveTab(int fromIndex, int toIndex);

private:
    QAction *m_recentlyClosedTabsAction;
    QAction *m_newTabAction;
    QAction *m_closeTabAction;
    QAction *m_nextTabAction;
    QAction *m_previousTabAction;

    QMenu *m_recentlyClosedTabsMenu;
    static const int m_recentlyClosedTabsSize = 10;
    QList<QUrl> m_recentlyClosedTabs;
    QList<WebActionMapper*> m_actions;

    QCompleter *m_lineEditCompleter;
    QStackedWidget *m_lineEdits;
    TabBar *m_tabBar;
};

#endif // TABWIDGET_H

