/*
    This file is part of the KDE project
    Copyright (C) 2024 Ivailo Monev <xakepa10@gmail.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2, as published by the Free Software Foundation.

    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.
*/

#include "launcher.h"
#include "kworkspace/kworkspace.h"
#include "kworkspace/kdisplaymanager.h"

#include <QMutex>
#include <QGraphicsLinearLayout>
#include <QGraphicsGridLayout>
#include <QHostInfo>
#include <QFile>
#include <QDBusInterface>
#include <QGraphicsSceneMouseEvent>
#include <KUser>
#include <kdbusconnectionpool.h>
#include <KIcon>
#include <KIconLoader>
#include <KStandardDirs>
#include <KSycoca>
#include <KToolInvocation>
#include <KRun>
#include <KBookmarkManager>
#include <KServiceGroup>
#include <KDirWatch>
#include <KDesktopFile>
#include <KRecentDocument>
#include <Solid/PowerManagement>
#include <Plasma/IconWidget>
#include <Plasma/Separator>
#include <Plasma/Label>
#include <Plasma/LineEdit>
#include <Plasma/TabBar>
#include <Plasma/Frame>
#include <Plasma/SvgWidget>
#include <Plasma/ToolButton>
#include <Plasma/ScrollWidget>
#include <Plasma/BusyWidget>
#include <Plasma/RunnerManager>
#include <Plasma/Animation>
#include <KDebug>

// TODO: maybe favorites moving, animated layout updates

static const QString s_defaultpopupicon = QString::fromLatin1("start-here-kde");
static const QSizeF s_minimumsize = QSizeF(450, 350);
static const QString s_firsttimeaddress = QString::fromLatin1("_k_firsttime");
static const QStringList s_firsttimeservices = QStringList()
    << QString::fromLatin1("konsole")
    << QString::fromLatin1("dolphin")
    << QString::fromLatin1("systemsettings");
static const QString s_usericon = QString::fromLatin1("user-identity");
static const QString s_genericicon = QString::fromLatin1("applications-other");
static const QString s_favoriteicon = QString::fromLatin1("bookmarks");
static const QString s_recenticon = QString::fromLatin1("document-open-recent");
static const int s_searchdelay = 500; // ms
static const int s_polltimeout = 5000; // ms
// enough time for the animation to finish
static const int s_leavedelay = 500; // ms

static QSizeF kIconSize()
{
    const int iconsize = KIconLoader::global()->currentSize(KIconLoader::Desktop);
    return QSizeF(iconsize, iconsize);
}

static QGraphicsWidget* kMakeSpacer(QGraphicsWidget *parent)
{
    QGraphicsWidget* widget = new QGraphicsWidget(parent);
    widget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    widget->setMinimumSize(0, 0);
    widget->setPreferredSize(0, 0);
    widget->setFlag(QGraphicsItem::ItemHasNoContents);
    return widget;
}

static Plasma::ScrollWidget* kMakeScrollWidget(QGraphicsWidget *parent)
{
    Plasma::ScrollWidget* scrollwidget = new Plasma::ScrollWidget(parent);
    scrollwidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    return scrollwidget;
}

static void kRunService(const QString &entrypath, LauncherApplet* launcherapplet)
{
    Q_ASSERT(launcherapplet != nullptr);
    launcherapplet->resetState();

    KService::Ptr service = KService::serviceByDesktopPath(entrypath);
    Q_ASSERT(!service.isNull());
    if (!KRun::run(*service.data(), KUrl::List(), nullptr)) {
        kWarning() << "could not run" << entrypath;
    }
}

static void kRunUrl(const QString &urlpath, LauncherApplet* launcherapplet)
{
    Q_ASSERT(launcherapplet != nullptr);
    launcherapplet->resetState();

    (void)new KRun(KUrl(urlpath), nullptr);
}

static KIcon kGenericIcon(const QString &name)
{
    if (!name.isEmpty()) {
        return KIcon(name);
    }
    return KIcon(s_genericicon);
}

static KIcon kFavoriteIcon(const QString &name)
{
    if (!name.isEmpty()) {
        return KIcon(name);
    }
    return KIcon(s_favoriteicon);
}

static KIcon kRecentIcon(const QString &name)
{
    if (!name.isEmpty()) {
        return KIcon(name);
    }
    return KIcon(s_recenticon);
}

static QStringList kAllowedRunners(KConfigGroup configgroup)
{
    QStringList result;
    foreach (KPluginInfo plugin, Plasma::RunnerManager::listRunnerInfo()) {
        plugin.load(configgroup);
        if (plugin.isPluginEnabled()) {
            result.append(plugin.pluginName());
        }
    }
    return result;
}

static QMimeData* kMakeMimeData(const QString &url)
{
    Q_ASSERT(!url.isEmpty());
    QMimeData* mimedata = new QMimeData();
    mimedata->setUrls(QList<QUrl>() << url);
    return mimedata;
}

class LauncherWidget : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherWidget(QGraphicsWidget *parent);
    ~LauncherWidget();

    void setup(const QSizeF &iconsize, const QIcon &icon, const QString &text, const QString &subtext);
    void disableHover();

    QString data() const;
    void setData(const QString &data);

    void setMimeData(QMimeData *mimedata);

    void addAction(QAction *action);
    void removeAction(const int action);

Q_SIGNALS:
    void activated();

private Q_SLOTS:
    void slotUpdateFonts();

protected:
    void hoverEnterEvent(QGraphicsSceneHoverEvent *event) final;
    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) final;
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) final;
    bool sceneEventFilter(QGraphicsItem *item, QEvent *event) final;

private:
    Plasma::Animation* animateFadeIn(Plasma::Animation *animation, Plasma::ToolButton *toolbutton);
    Plasma::Animation* animateFadeOut(Plasma::Animation *animation, Plasma::ToolButton *toolbutton);
    bool handleMouseEvent(QGraphicsSceneMouseEvent *event) const;

    QGraphicsLinearLayout* m_layout;
    Plasma::IconWidget* m_iconwidget;
    QGraphicsLinearLayout* m_textlayout;
    Plasma::Label* m_textwidget;
    Plasma::Label* m_subtextwidget;
    QGraphicsGridLayout* m_actionslayout;
    Plasma::ToolButton* m_action1widget;
    Plasma::ToolButton* m_action2widget;
    Plasma::ToolButton* m_action3widget;
    Plasma::ToolButton* m_action4widget;
    Plasma::Animation* m_action1animation;
    Plasma::Animation* m_action2animation;
    Plasma::Animation* m_action3animation;
    Plasma::Animation* m_action4animation;
    QString m_data;
    int m_actioncounter;
    QPointer<QMimeData> m_mimedata;
};

LauncherWidget::LauncherWidget(QGraphicsWidget *parent)
    : QGraphicsWidget(parent),
    m_layout(nullptr),
    m_iconwidget(nullptr),
    m_textlayout(nullptr),
    m_textwidget(nullptr),
    m_subtextwidget(nullptr),
    m_actionslayout(nullptr),
    m_action1widget(nullptr),
    m_action2widget(nullptr),
    m_action3widget(nullptr),
    m_action4widget(nullptr),
    m_action1animation(nullptr),
    m_action2animation(nullptr),
    m_action3animation(nullptr),
    m_action4animation(nullptr),
    m_actioncounter(0),
    m_mimedata(nullptr)
{
    m_layout = new QGraphicsLinearLayout(Qt::Horizontal, this);
    setLayout(m_layout);

    m_iconwidget = new Plasma::IconWidget(this);
    m_layout->addItem(m_iconwidget);
    connect(
        m_iconwidget, SIGNAL(activated()),
        this, SIGNAL(activated())
    );

    m_textlayout = new QGraphicsLinearLayout(Qt::Vertical, m_layout);
    m_textlayout->setContentsMargins(6, 6, 6, 6);
    m_layout->addItem(m_textlayout);
    m_layout->setStretchFactor(m_textlayout, 100);
    m_textwidget = new Plasma::Label(this);
    m_textwidget->setWordWrap(false);
    m_textlayout->addItem(m_textwidget);
    m_subtextwidget = new Plasma::Label(this);
    m_subtextwidget->setWordWrap(false);
    m_textlayout->addItem(m_subtextwidget);

    m_actionslayout = new QGraphicsGridLayout(m_layout);
    m_layout->addItem(m_actionslayout);
    m_action1widget = new Plasma::ToolButton(this);
    m_action1widget->setVisible(false);
    m_actionslayout->addItem(m_action1widget, 0, 0);
    m_action2widget = new Plasma::ToolButton(this);
    m_action2widget->setVisible(false);
    m_actionslayout->addItem(m_action2widget, 1, 0);
    m_action3widget = new Plasma::ToolButton(this);
    m_action3widget->setVisible(false);
    m_actionslayout->addItem(m_action3widget, 0, 1);
    m_action4widget = new Plasma::ToolButton(this);
    m_action4widget->setVisible(false);
    m_actionslayout->addItem(m_action4widget, 1, 1);

    slotUpdateFonts();
    connect(
        KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
        this, SLOT(slotUpdateFonts())
    );
}

LauncherWidget::~LauncherWidget()
{
    if (m_mimedata) {
        m_mimedata->deleteLater();
    }
}

void LauncherWidget::setup(const QSizeF &iconsize, const QIcon &icon, const QString &text, const QString &subtext)
{
    m_iconwidget->setMinimumIconSize(iconsize);
    m_iconwidget->setIcon(icon);
    m_textwidget->setText(text);
    m_subtextwidget->setText(subtext);
    m_subtextwidget->setVisible(!subtext.isEmpty());
}

void LauncherWidget::disableHover()
{
    m_iconwidget->setAcceptHoverEvents(false);
    m_iconwidget->setAcceptedMouseButtons(Qt::NoButton);
}

QString LauncherWidget::data() const
{
    return m_data;
}

void LauncherWidget::setData(const QString &data)
{
    m_data = data;
}

void LauncherWidget::setMimeData(QMimeData *mimedata)
{
    if (mimedata) {
        m_mimedata = mimedata;
        setAcceptedMouseButtons(Qt::LeftButton);
        m_iconwidget->setAcceptedMouseButtons(Qt::LeftButton);
        m_iconwidget->installSceneEventFilter(this);
    }
}

void LauncherWidget::addAction(QAction *action)
{
    // 4 actions are packed into a small area, the text is getting in the way. however if there is
    // no tooltip use the text as tooltip
    if (action->toolTip().isEmpty() && !action->text().isEmpty()) {
        action->setToolTip(action->text());
    }
    action->setText(QString());
    if (action->icon().isNull()) {
        kWarning() << "action does not have icon" << action;
        return;
    }
    switch (m_actioncounter) {
        case 0: {
            m_action1widget->setVisible(true);
            m_action1widget->setOpacity(0.0);
            m_action1widget->setAction(action);
            break;
        }
        case 1: {
            m_action2widget->setVisible(true);
            m_action2widget->setOpacity(0.0);
            m_action2widget->setAction(action);
            break;
        }
        case 2: {
            m_action3widget->setVisible(true);
            m_action3widget->setOpacity(0.0);
            m_action3widget->setAction(action);
            break;
        }
        case 3: {
            m_action4widget->setVisible(true);
            m_action4widget->setOpacity(0.0);
            m_action4widget->setAction(action);
            break;
        }
        default: {
            Q_ASSERT(false);
            kWarning() << "invalid action counter" << m_actioncounter;
            return;
        }
    }
    m_actioncounter++;
    setAcceptHoverEvents(m_actioncounter > 0);
}

void LauncherWidget::removeAction(const int actionnumber)
{
    QAction* action = nullptr;
    switch (actionnumber) {
        case 0: {
            m_action1widget->setVisible(false);
            action = m_action1widget->action();
            break;
        }
        case 1: {
            m_action2widget->setVisible(false);
            action = m_action2widget->action();
            break;
        }
        case 2: {
            m_action3widget->setVisible(false);
            action = m_action3widget->action();
            break;
        }
        case 3: {
            m_action4widget->setVisible(false);
            action = m_action4widget->action();
            break;
        }
        default: {
            Q_ASSERT(false);
            kWarning() << "invalid action number" << action;
            return;
        }
    }
    if (action) {
        action->deleteLater();
        if (m_actioncounter > 0) {
            m_actioncounter--;
        }
    }
    setAcceptHoverEvents(m_actioncounter > 0);
}

void LauncherWidget::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
    m_action1animation = animateFadeIn(m_action1animation, m_action1widget);
    m_action2animation = animateFadeIn(m_action2animation, m_action2widget);
    m_action3animation = animateFadeIn(m_action3animation, m_action3widget);
    m_action4animation = animateFadeIn(m_action4animation, m_action4widget);
}

void LauncherWidget::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
    m_action1animation = animateFadeOut(m_action1animation, m_action1widget);
    m_action2animation = animateFadeOut(m_action2animation, m_action2widget);
    m_action3animation = animateFadeOut(m_action3animation, m_action3widget);
    m_action4animation = animateFadeOut(m_action4animation, m_action4widget);
}

void LauncherWidget::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    if (m_mimedata && handleMouseEvent(event)) {
        return;
    }
    QGraphicsWidget::mouseMoveEvent(event);
}

bool LauncherWidget::sceneEventFilter(QGraphicsItem *item, QEvent *event)
{
    if ((item == m_iconwidget || item == m_textwidget) && event->type() == QEvent::GraphicsSceneMouseMove) {
        QGraphicsSceneMouseEvent* mouseevent = static_cast<QGraphicsSceneMouseEvent*>(event);
        if (m_mimedata && handleMouseEvent(mouseevent)) {
            return true;
        }
    }
    return false;
}

Plasma::Animation* LauncherWidget::animateFadeIn(Plasma::Animation *animation, Plasma::ToolButton *toolbutton)
{
    if (!toolbutton->isVisible()) {
        return nullptr;
    }
    if (animation) {
        animation->stop();
    } else {
        animation = Plasma::Animator::create(Plasma::Animator::FadeAnimation, this);
        Q_ASSERT(animation != nullptr);
        animation->setTargetWidget(toolbutton);
    }
    animation->setProperty("startOpacity", toolbutton->opacity());
    animation->setProperty("targetOpacity", 1.0);
    animation->start(QAbstractAnimation::KeepWhenStopped);
    return animation;
}

Plasma::Animation* LauncherWidget::animateFadeOut(Plasma::Animation *animation, Plasma::ToolButton *toolbutton)
{
    if (!toolbutton->isVisible()) {
        return nullptr;
    }
    if (animation) {
        animation->stop();
    } else {
        animation = Plasma::Animator::create(Plasma::Animator::FadeAnimation, this);
        Q_ASSERT(animation != nullptr);
        animation->setTargetWidget(toolbutton);
    }
    animation->setProperty("startOpacity", toolbutton->opacity());
    animation->setProperty("targetOpacity", 0.0);
    animation->start(QAbstractAnimation::KeepWhenStopped);
    return animation;
}

bool LauncherWidget::handleMouseEvent(QGraphicsSceneMouseEvent *event) const
{
    if (event->buttons() & Qt::LeftButton &&
        (event->pos() - event->buttonDownPos(Qt::LeftButton)).manhattanLength() > KGlobalSettings::dndEventDelay())
    {
        // NOTE QDrag takes ownership of QMimeData, have to copy
        QMimeData* dragmimedata = new QMimeData();
        dragmimedata->setText(m_mimedata->text());
        dragmimedata->setUrls(m_mimedata->urls());
        foreach (const QString &mimeformat, m_mimedata->formats()) {
            dragmimedata->setData(mimeformat, m_mimedata->data(mimeformat));
        }
        event->accept();
        QDrag* drag = new QDrag(event->widget());
        drag->setMimeData(dragmimedata);
        const QPixmap iconpixmap = m_iconwidget->icon().pixmap(kIconSize().toSize());
        if (!iconpixmap.isNull()) {
            drag->setPixmap(iconpixmap);
            // same as the one in KColorMimeData and KPixmapWidget
            drag->setHotSpot(QPoint(-5,-7));
        }
        drag->start();
        return true;
    }
    return false;
}

void LauncherWidget::slotUpdateFonts()
{
    QFont textfont = KGlobalSettings::generalFont();
    textfont.setBold(true);
    m_textwidget->setFont(textfont);
    QFont subtextfont = KGlobalSettings::smallestReadableFont();
    subtextfont.setItalic(true);
    m_subtextwidget->setFont(subtextfont);
}


class LauncherSearch : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherSearch(QGraphicsWidget *parent, LauncherApplet *launcherapplet);

    void setAllowedRunners(const QStringList &runners);
    void prepare();
    void query(const QString &text);

private Q_SLOTS:
    void slotUpdateLayout();
    void slotTriggered();
    void slotActivated();

private:
    QMutex m_mutex;
    LauncherApplet* m_launcherapplet;
    QGraphicsLinearLayout* m_layout;
    QList<LauncherWidget*> m_launcherwidgets;
    Plasma::Label* m_label;
    Plasma::BusyWidget* m_busywidget;
    Plasma::RunnerManager* m_runnermanager;
};

LauncherSearch::LauncherSearch(QGraphicsWidget *parent, LauncherApplet *launcherapplet)
    : QGraphicsWidget(parent),
    m_launcherapplet(launcherapplet),
    m_layout(nullptr),
    m_label(nullptr),
    m_busywidget(nullptr),
    m_runnermanager(nullptr)
{
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    setLayout(m_layout);

    m_label = new Plasma::Label(this);
    m_label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_label->setAlignment(Qt::AlignCenter);
    m_layout->addItem(m_label);

    m_busywidget = new Plasma::BusyWidget(this);
    m_busywidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout->addItem(m_busywidget);

    m_runnermanager = new Plasma::RunnerManager(this);
    connect(
        m_runnermanager, SIGNAL(queryFinished()),
        this, SLOT(slotUpdateLayout())
    );
}

void LauncherSearch::setAllowedRunners(const QStringList &runners)
{
    m_runnermanager->reloadConfiguration();
    m_runnermanager->setAllowedRunners(runners);
}

void LauncherSearch::prepare()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_layout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    m_label->setText(i18n("Searching.."));
    m_label->setVisible(true);
    m_busywidget->setVisible(true);
    m_busywidget->setRunning(true);
    adjustSize();

    m_runnermanager->reset();
}

void LauncherSearch::query(const QString &text)
{
    m_runnermanager->launchQuery(text);
}

void LauncherSearch::slotUpdateLayout()
{
    QMutexLocker locker(&m_mutex);
    const QList<Plasma::QueryMatch> matches = m_runnermanager->matches();
    m_busywidget->setRunning(false);
    m_busywidget->setVisible(false);
    if (matches.isEmpty()) {
        m_label->setText(i18n("No matches found"));
        m_label->setVisible(true);
    } else {
        m_label->setVisible(false);
    }
    adjustSize();

    const QSizeF iconsize = kIconSize();
    foreach (const Plasma::QueryMatch &match, matches) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, match.icon(), match.text(), match.subtext()
        );
        launcherwidget->setData(match.id());
        if (!match.isEnabled()) {
            launcherwidget->disableHover();
        }
        int counter = 0;
        const QList<QAction*> matchactions = m_runnermanager->actionsForMatch(match);
        foreach (QAction* action, matchactions) {
            action->setProperty("_k_id", match.id());
            launcherwidget->addAction(action);
            connect(
                action, SIGNAL(triggered()),
                this, SLOT(slotTriggered())
            );
            counter++;
            if (counter >= 4) {
                kWarning() << "the limit of LauncherWidget actions has been reached" << matchactions.size();
                break;
            }
        }
        launcherwidget->setMimeData(m_runnermanager->mimeDataForMatch(match));
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
}

void LauncherSearch::slotTriggered()
{
    QAction* matchaction = qobject_cast<QAction*>(sender());
    const QString matchid = matchaction->property("_k_id").toString();
    m_launcherapplet->resetState();
    foreach (Plasma::QueryMatch match, m_runnermanager->matches()) {
        if (match.id() == matchid) {
            match.setSelectedAction(matchaction);
            match.run();
            return;
        }
    }
    kWarning() << "could not find match for" << matchid;
}

void LauncherSearch::slotActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    m_launcherapplet->resetState();
    const QString matchid = launcherwidget->data();
    foreach (const Plasma::QueryMatch &match, m_runnermanager->matches()) {
        if (match.id() == matchid) {
            match.run();
            return;
        }
    }
    kWarning() << "could not find match for" << matchid;
}


class LauncherFavorites : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherFavorites(QGraphicsWidget *parent, LauncherApplet* launcherapplet);

private Q_SLOTS:
    void slotUpdateLayout();
    void slotActivated();
    void slotTriggered();

private:
    QMutex m_mutex;
    LauncherApplet* m_launcherapplet;
    KBookmarkManager* m_bookmarkmanager;
    QGraphicsLinearLayout* m_layout;
    QList<LauncherWidget*> m_launcherwidgets;
};

LauncherFavorites::LauncherFavorites(QGraphicsWidget *parent, LauncherApplet* launcherapplet)
    : QGraphicsWidget(parent),
    m_launcherapplet(launcherapplet),
    m_bookmarkmanager(launcherapplet->bookmarkManager()),
    m_layout(nullptr)
{
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    setLayout(m_layout);

    slotUpdateLayout();
    connect(
        m_bookmarkmanager, SIGNAL(changed(QString,QString)),
        this, SLOT(slotUpdateLayout())
    );
    connect(
        m_bookmarkmanager, SIGNAL(bookmarksChanged(QString)),
        this, SLOT(slotUpdateLayout())
    );
    connect(
        KSycoca::self(), SIGNAL(databaseChanged(QStringList)),
        this, SLOT(slotUpdateLayout())
    );
}

void LauncherFavorites::slotUpdateLayout()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_layout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    adjustSize();

    bool isfirsttime = true;
    KBookmarkGroup bookmarkgroup = m_bookmarkmanager->root();
    // first time gets a special treatment
    KBookmark bookmark = bookmarkgroup.first();
    while (!bookmark.isNull()) {
        if (bookmark.url().url() == s_firsttimeaddress) {
            isfirsttime = false;
            break;
        }
        bookmark = bookmarkgroup.next(bookmark);
    }
    if (isfirsttime) {
        bookmark = bookmarkgroup.createNewSeparator();
        bookmark.setUrl(s_firsttimeaddress);
        bookmark.setDescription("internal bookmark");
        foreach (const QString &name, s_firsttimeservices) {
            KService::Ptr service = KService::serviceByDesktopName(name);
            if (!service.isNull()) {
                bookmarkgroup.addBookmark(service->desktopEntryName(), KUrl(service->entryPath()), service->icon());
            } else {
                kWarning() << "invalid first-time serivce" << name;
            }
        }
        m_bookmarkmanager->emitChanged(bookmarkgroup);
    }

    const QSizeF iconsize = kIconSize();
    bookmark = bookmarkgroup.first();
    while (!bookmark.isNull()) {
        if (bookmark.isSeparator()) {
            bookmark = bookmarkgroup.next(bookmark);
            continue;
        }
        const QString bookmarkentrypath = bookmark.url().url();
        KService::Ptr service = KService::serviceByDesktopPath(bookmarkentrypath);
        if (service.isNull()) {
            service = KService::serviceByDesktopName(bookmark.text());
        }
        if (service.isNull()) {
            kWarning() << "could not find service for" << bookmarkentrypath;
            bookmark = bookmarkgroup.next(bookmark);
            continue;
        }
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, kFavoriteIcon(service->icon()), service->name(), service->genericName()
        );
        const QString entrypath = service->entryPath();
        launcherwidget->setData(entrypath);
        QAction* favoriteaction = new QAction(launcherwidget);
        favoriteaction->setIcon(KIcon("edit-delete"));
        favoriteaction->setToolTip(i18n("Remove"));
        favoriteaction->setProperty("_k_id", bookmarkentrypath);
        connect(
            favoriteaction, SIGNAL(triggered()),
            this, SLOT(slotTriggered()),
            Qt::QueuedConnection
        );
        launcherwidget->addAction(favoriteaction);
        launcherwidget->setMimeData(kMakeMimeData(entrypath));
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
        bookmark = bookmarkgroup.next(bookmark);
    }
}

void LauncherFavorites::slotActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    kRunService(launcherwidget->data(), m_launcherapplet);
}

void LauncherFavorites::slotTriggered()
{
    QAction* favoriteaction = qobject_cast<QAction*>(sender());
    const QString favoriteid = favoriteaction->property("_k_id").toString();
    KBookmarkGroup bookmarkgroup = m_bookmarkmanager->root();
    KBookmark bookmark = bookmarkgroup.first();
    while (!bookmark.isNull()) {
        if (bookmark.url().url() == favoriteid) {
            bookmarkgroup.deleteBookmark(bookmark);
            m_bookmarkmanager->emitChanged(bookmarkgroup);
            return;
        }
        bookmark = bookmarkgroup.next(bookmark);
    }
    kWarning() << "invalid bookmark" << favoriteid;
}


class LauncherNavigatorStruct
{
public:
    LauncherNavigatorStruct(Plasma::SvgWidget *_svgwidget, Plasma::ToolButton *_toolbutton)
        : svgwidget(_svgwidget), toolbutton(_toolbutton)
    {
    }

    Plasma::SvgWidget* svgwidget;
    Plasma::ToolButton* toolbutton;
};

class LauncherNavigator : public Plasma::Frame
{
    Q_OBJECT
public:
    LauncherNavigator(QGraphicsWidget *parent);

    void reset();
    void addNavigation(const QString &id, const QString &text);
    void finish();

Q_SIGNALS:
    void navigate(const QString &id);

private Q_SLOTS:
    void slotReleased();

private:
    QMutex m_mutex;
    QGraphicsLinearLayout* m_layout;
    Plasma::Svg* m_svg;
    QList<LauncherNavigatorStruct*> m_navigations;
    QGraphicsWidget* m_spacer;
};

LauncherNavigator::LauncherNavigator(QGraphicsWidget *parent)
    : Plasma::Frame(parent),
    m_layout(nullptr),
    m_svg(nullptr),
    m_spacer(nullptr)
{
    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
    setFrameShadow(Plasma::Frame::Sunken);
    m_layout = new QGraphicsLinearLayout(Qt::Horizontal, this);
    setLayout(m_layout);

    m_svg = new Plasma::Svg(this);
    m_svg->setImagePath("widgets/arrows");
}

void LauncherNavigator::reset()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherNavigatorStruct *navigation, m_navigations) {
        m_layout->removeItem(navigation->toolbutton);
        delete navigation->toolbutton;
        m_layout->removeItem(navigation->svgwidget);
        delete navigation->svgwidget;
    }
    qDeleteAll(m_navigations);
    m_navigations.clear();
    if (m_spacer) {
        m_layout->removeItem(m_spacer);
        delete m_spacer;
        m_spacer = nullptr;
    }
    m_spacer = kMakeSpacer(this);
    m_layout->addItem(m_spacer);
}

void LauncherNavigator::addNavigation(const QString &id, const QString &text)
{
    QMutexLocker locker(&m_mutex);
    Plasma::SvgWidget* svgwidget = new Plasma::SvgWidget(this);
    svgwidget->setElementID("right-arrow");
    svgwidget->setSvg(m_svg);
    m_layout->addItem(svgwidget);
    Plasma::ToolButton* toolbutton = new Plasma::ToolButton(this);
    toolbutton->setText(text);
    toolbutton->setProperty("_k_id", id);
    m_layout->addItem(toolbutton);
    connect(
        toolbutton, SIGNAL(released()),
        this, SLOT(slotReleased())
    );
    if (m_spacer) {
        m_layout->removeItem(m_spacer);
        delete m_spacer;
        m_spacer = nullptr;
    }
    m_spacer = kMakeSpacer(this);
    m_layout->addItem(m_spacer);
    m_navigations.append(new LauncherNavigatorStruct(svgwidget, toolbutton));
}

void LauncherNavigator::finish()
{
    QMutexLocker locker(&m_mutex);
    if (m_navigations.size() > 0) {
        // make the last navigator button match the tabbar
        LauncherNavigatorStruct *navigation =  m_navigations.last();
        navigation->toolbutton->setAutoRaise(false);
        navigation->toolbutton->setAcceptedMouseButtons(Qt::NoButton);
    }
}

void LauncherNavigator::slotReleased()
{
    Plasma::ToolButton* toolbutton = qobject_cast<Plasma::ToolButton*>(sender());
    emit navigate(toolbutton->property("_k_id").toString());
}

class LauncherApplications : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherApplications(QGraphicsWidget *parent, LauncherApplet *launcherapplet);

private Q_SLOTS:
    void slotUpdateLayout();
    void slotNavigate(const QString &id);
    void slotDelayedNavigate();
    void slotGroupActivated();
    void slotAppActivated();
    void slotCheckBookmarks();
    void slotTriggered();

private:
    void addGroup(KServiceGroup::Ptr servicegroup);

    QMutex m_mutex;
    LauncherApplet* m_launcherapplet;
    KBookmarkManager* m_bookmarkmanager;
    QGraphicsLinearLayout* m_layout;
    LauncherNavigator* m_launchernavigator;
    Plasma::ScrollWidget* m_scrollwidget;
    QGraphicsWidget* m_launchersswidget;
    QGraphicsLinearLayout* m_launcherslayout;
    QList<LauncherWidget*> m_launcherwidgets;
    QString m_id;
};

LauncherApplications::LauncherApplications(QGraphicsWidget *parent, LauncherApplet *launcherapplet)
    : QGraphicsWidget(parent),
    m_launcherapplet(launcherapplet),
    m_bookmarkmanager(launcherapplet->bookmarkManager()),
    m_layout(nullptr),
    m_launchernavigator(nullptr),
    m_scrollwidget(nullptr),
    m_launchersswidget(nullptr),
    m_launcherslayout(nullptr)
    
{
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    setLayout(m_layout);

    m_launchernavigator = new LauncherNavigator(this);
    m_layout->addItem(m_launchernavigator);

    m_scrollwidget = kMakeScrollWidget(this);
    m_launchersswidget = new QGraphicsWidget(m_scrollwidget);
    m_launchersswidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_launcherslayout = new QGraphicsLinearLayout(Qt::Vertical, m_launchersswidget);
    m_launchersswidget->setLayout(m_launcherslayout);
    m_scrollwidget->setWidget(m_launchersswidget);
    m_layout->addItem(m_scrollwidget);

    slotUpdateLayout();

    connect(
        m_launchernavigator, SIGNAL(navigate(QString)),
        this, SLOT(slotNavigate(QString))
    );
    connect(
        m_bookmarkmanager, SIGNAL(changed(QString,QString)),
        this, SLOT(slotCheckBookmarks())
    );
    connect(
        m_bookmarkmanager, SIGNAL(bookmarksChanged(QString)),
        this, SLOT(slotCheckBookmarks())
    );
    connect(
        KSycoca::self(), SIGNAL(databaseChanged(QStringList)),
        this, SLOT(slotUpdateLayout())
    );
}

void LauncherApplications::slotUpdateLayout()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_launcherslayout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    m_launchernavigator->reset();

    m_launchersswidget->adjustSize();
    adjustSize();

    m_id.clear();
    KServiceGroup::Ptr rootgroup = KServiceGroup::root();
    if (!rootgroup.isNull() && rootgroup->isValid()) {
        m_id = rootgroup->relPath();
        m_launchernavigator->addNavigation(m_id, rootgroup->caption());
        addGroup(rootgroup);
        m_launchernavigator->finish();
    }

    locker.unlock();
    slotCheckBookmarks();
}

void LauncherApplications::addGroup(KServiceGroup::Ptr servicegroup)
{
    const QSizeF iconsize = kIconSize();
    foreach (const KServiceGroup::Ptr subgroup, servicegroup->groupEntries(KServiceGroup::NoOptions)) {
        if (subgroup->noDisplay() || subgroup->childCount() < 1) {
            continue;
        }
        LauncherWidget* launcherwidget = new LauncherWidget(m_launchersswidget);
        launcherwidget->setup(
            iconsize, kGenericIcon(subgroup->icon()), subgroup->caption(), subgroup->comment()
        );
        launcherwidget->setData(subgroup->relPath());
        m_launcherwidgets.append(launcherwidget);
        m_launcherslayout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotGroupActivated())
        );
    }
    foreach (const KService::Ptr appservice, servicegroup->serviceEntries(KServiceGroup::NoOptions)) {
        if (appservice->noDisplay()) {
            continue;
        }
        const QString entrypath = appservice->entryPath();
        LauncherWidget* launcherwidget = new LauncherWidget(m_launchersswidget);
        launcherwidget->setup(
            iconsize, kGenericIcon(appservice->icon()), appservice->name(), appservice->comment()
        );
        launcherwidget->setData(entrypath);
        launcherwidget->setMimeData(kMakeMimeData(entrypath));
        m_launcherwidgets.append(launcherwidget);
        m_launcherslayout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotAppActivated())
        );
    }
    const QString serviceid = servicegroup->relPath();
    if (serviceid.isEmpty() || serviceid == QLatin1String("/")) {
        // hide the navigator when the root group is empty
        m_launchernavigator->setVisible(m_launcherwidgets.size() > 0);
    }
}

void LauncherApplications::slotNavigate(const QString &id)
{
    if (id == m_id) {
        return;
    }

    m_id = id;
    // delayed because this is connected to widgets that will be destroyed
    QTimer::singleShot(100, this, SLOT(slotDelayedNavigate()));
}

void LauncherApplications::slotDelayedNavigate()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_layout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    m_launchernavigator->reset();

    m_launchersswidget->adjustSize();
    adjustSize();

    KServiceGroup::Ptr servicegroup = KServiceGroup::group(m_id);
    if (!servicegroup.isNull() && servicegroup->isValid()) {
        KServiceGroup::Ptr rootgroup = KServiceGroup::root();
        if (!rootgroup.isNull() && rootgroup->isValid()) {
            m_launchernavigator->addNavigation(rootgroup->relPath(), rootgroup->caption());
        } else {
            kWarning() << "root group is not valid";
        }

        QString groupid;
        foreach (const QString &subname, m_id.split(QLatin1Char('/'), QString::SkipEmptyParts)) {
            groupid.append(subname);
            groupid.append(QLatin1Char('/'));
            KServiceGroup::Ptr subgroup = KServiceGroup::group(groupid);
            if (subgroup.isNull() || !subgroup->isValid()) {
                kWarning() << "invalid subgroup" << subname;
                continue;
            }
            m_launchernavigator->addNavigation(groupid, subgroup->caption());
        }
        addGroup(servicegroup);
    } else {
        kWarning() << "invalid group" << m_id;
    }
    m_launchernavigator->finish();

    locker.unlock();
    slotCheckBookmarks();
}

void LauncherApplications::slotGroupActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    slotNavigate(launcherwidget->data());
}

void LauncherApplications::slotAppActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    kRunService(launcherwidget->data(), m_launcherapplet);
}

void LauncherApplications::slotCheckBookmarks()
{
    QStringList bookmarkurls;
    KBookmarkGroup bookmarkgroup = m_bookmarkmanager->root();
    KBookmark bookmark = bookmarkgroup.first();
    while (!bookmark.isNull()) {
        bookmarkurls.append(bookmark.url().url());
        bookmark = bookmarkgroup.next(bookmark);
    }

    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        const QString launcherdata = launcherwidget->data();
        const bool isinfavorites = bookmarkurls.contains(launcherdata);
        // there is only one action, it is known which one is that
        launcherwidget->removeAction(0);
        if (!isinfavorites) {
            KService::Ptr service = KService::serviceByDesktopPath(launcherdata);
            if (!service.isNull() && service->isValid()) {
                QAction* favoriteaction = new QAction(launcherwidget);
                favoriteaction->setIcon(KIcon(s_favoriteicon));
                favoriteaction->setToolTip(i18n("Add to Favorites"));
                favoriteaction->setProperty("_k_id", launcherdata);
                launcherwidget->addAction(favoriteaction);
                connect(
                    favoriteaction, SIGNAL(triggered()),
                    this, SLOT(slotTriggered())
                );
            }
        }
    }
}

void LauncherApplications::slotTriggered()
{
    QAction* favoriteaction = qobject_cast<QAction*>(sender());
    const QString favoriteid = favoriteaction->property("_k_id").toString();
    KService::Ptr service = KService::serviceByDesktopPath(favoriteid);
    if (!service.isNull()) {
        KBookmarkGroup bookmarkgroup = m_bookmarkmanager->root();
        bookmarkgroup.addBookmark(service->desktopEntryName(), KUrl(service->entryPath()), service->icon());
        m_bookmarkmanager->emitChanged(bookmarkgroup);
        favoriteaction->setVisible(false);
    } else {
        kWarning() << "invalid favorite serivce" << favoriteid;
    }
}


class LauncherRecent : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherRecent(QGraphicsWidget *parent, LauncherApplet *launcherapplet);

private Q_SLOTS:
    void slotUpdateLayout();
    void slotActivated();
    void slotTriggered();

private:
    QMutex m_mutex;
    LauncherApplet* m_launcherapplet;
    QGraphicsLinearLayout* m_layout;
    QList<LauncherWidget*> m_launcherwidgets;
    KDirWatch* m_dirwatch;
};

LauncherRecent::LauncherRecent(QGraphicsWidget *parent, LauncherApplet *launcherapplet)
    : QGraphicsWidget(parent),
    m_launcherapplet(launcherapplet),
    m_layout(nullptr),
    m_dirwatch(nullptr)
{
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    setLayout(m_layout);

    m_dirwatch = new KDirWatch(this);
    m_dirwatch->addDir(KRecentDocument::recentDocumentDirectory());
    slotUpdateLayout();
    connect(
        m_dirwatch, SIGNAL(dirty(QString)),
        this, SLOT(slotUpdateLayout())
    );
}

void LauncherRecent::slotUpdateLayout()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_layout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    adjustSize();

    const QSizeF iconsize = kIconSize();
    foreach (const QString &recent, KRecentDocument::recentDocuments()) {
        KDesktopFile recentfile(recent);
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, kRecentIcon(recentfile.readIcon()), recentfile.readName(), recentfile.readComment()
        );
        launcherwidget->setData(recentfile.readUrl());
        QAction* recenteaction = new QAction(launcherwidget);
        recenteaction->setIcon(KIcon("edit-delete"));
        recenteaction->setToolTip(i18n("Remove"));
        recenteaction->setProperty("_k_id", recent);
        connect(
            recenteaction, SIGNAL(triggered()),
            this, SLOT(slotTriggered()),
            Qt::QueuedConnection
        );
        launcherwidget->addAction(recenteaction);
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
}

void LauncherRecent::slotActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    kRunUrl(launcherwidget->data(), m_launcherapplet);
}

void LauncherRecent::slotTriggered()
{
    QAction* recenteaction = qobject_cast<QAction*>(sender());
    const QString recenteid = recenteaction->property("_k_id").toString();
    if (!QFile::remove(recenteid)) {
        kWarning() << "invalid recent" << recenteid;
    }
}


class LauncherLeave : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherLeave(QGraphicsWidget *parent, LauncherApplet *launcherapplet);

private Q_SLOTS:
    void slotUpdateLayout();
    void slotActivated();
    void slotTimeout();
    void slotDelayedSwitch();

private:
    QMutex m_mutex;
    LauncherApplet* m_launcherapplet;
    QGraphicsLinearLayout* m_layout;
    QList<LauncherWidget*> m_launcherwidgets;
    Plasma::Separator* m_systemseparator;
    QTimer* m_timer;
    bool m_canswitch;
    bool m_canreboot;
    bool m_canshutdown;
    KDisplayManager m_displaymanager;
};

LauncherLeave::LauncherLeave(QGraphicsWidget *parent, LauncherApplet *launcherapplet)
    : QGraphicsWidget(parent),
    m_launcherapplet(launcherapplet),
    m_systemseparator(nullptr),
    m_timer(nullptr),
    m_canswitch(false),
    m_canreboot(false),
    m_canshutdown(false)
{
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    setLayout(m_layout);

    m_timer = new QTimer(this);
    m_timer->setInterval(s_polltimeout);

    slotTimeout();
    slotUpdateLayout();
    connect(
        Solid::PowerManagement::notifier(), SIGNAL(supportedSleepStatesChanged()),
        this, SLOT(slotUpdateLayout())
    );
    connect(
        m_timer, SIGNAL(timeout()),
        this, SLOT(slotTimeout())
    );
    m_timer->start();
}

void LauncherLeave::slotUpdateLayout()
{
    QMutexLocker locker(&m_mutex);
    foreach (LauncherWidget* launcherwidget, m_launcherwidgets) {
        m_layout->removeItem(launcherwidget);
    }
    qDeleteAll(m_launcherwidgets);
    m_launcherwidgets.clear();

    if (m_systemseparator) {
        m_layout->removeItem(m_systemseparator);
        delete m_systemseparator;
        m_systemseparator = nullptr;
    }

    adjustSize();

    const QSizeF iconsize = kIconSize();
    bool hassessionicon = false;
    if (m_canswitch) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-switch-user"), i18n("Switch user"), i18n("Start a parallel session as a different user")
        );
        launcherwidget->setData("switch");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
        hassessionicon = true;
    }
    if (hassessionicon) {
        m_systemseparator = new Plasma::Separator(this);
        m_systemseparator->setOrientation(Qt::Horizontal);
        m_layout->addItem(m_systemseparator);
    }

    const QSet<Solid::PowerManagement::SleepState> sleepsates = Solid::PowerManagement::supportedSleepStates();
    if (sleepsates.contains(Solid::PowerManagement::SuspendState)) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-suspend"), i18n("Sleep"), i18n("Suspend to RAM")
        );
        launcherwidget->setData("suspendram");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
    if (sleepsates.contains(Solid::PowerManagement::HibernateState)) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-suspend-hibernate"), i18n("Hibernate"), i18n("Suspend to disk")
        );
        launcherwidget->setData("suspenddisk");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
    if (sleepsates.contains(Solid::PowerManagement::HybridSuspendState)) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-suspend"), i18n("Hybrid Suspend"), i18n("Hybrid Suspend")
        );
        launcherwidget->setData("suspendhybrid");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }

    if (m_canreboot) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-reboot"), i18nc("Restart computer", "Restart"), i18n("Restart computer")
        );
        launcherwidget->setData("restart");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
    if (m_canshutdown) {
        LauncherWidget* launcherwidget = new LauncherWidget(this);
        launcherwidget->setup(
            iconsize, KIcon("system-shutdown"), i18n("Shut down"), i18n("Turn off computer")
        );
        launcherwidget->setData("shutdown");
        m_launcherwidgets.append(launcherwidget);
        m_layout->addItem(launcherwidget);
        connect(
            launcherwidget, SIGNAL(activated()),
            this, SLOT(slotActivated())
        );
    }
    LauncherWidget* launcherwidget = new LauncherWidget(this);
    launcherwidget->setup(
        iconsize, KIcon("system-log-out"), i18n("Log out"), i18n("End session")
    );
    launcherwidget->setData("logout");
    m_launcherwidgets.append(launcherwidget);
    m_layout->addItem(launcherwidget);
    connect(
        launcherwidget, SIGNAL(activated()),
        this, SLOT(slotActivated())
    );
}

void LauncherLeave::slotActivated()
{
    LauncherWidget* launcherwidget = qobject_cast<LauncherWidget*>(sender());
    const QString launcherwidgetdata = launcherwidget->data();
    m_launcherapplet->resetState();
    if (launcherwidgetdata == QLatin1String("switch")) {
        QTimer::singleShot(s_leavedelay, this, SLOT(slotDelayedSwitch()));
    } else if (launcherwidgetdata == QLatin1String("suspendram")) {
        Solid::PowerManagement::requestSleep(Solid::PowerManagement::SuspendState);
    } else if (launcherwidgetdata == QLatin1String("suspenddisk")) {
        Solid::PowerManagement::requestSleep(Solid::PowerManagement::HibernateState);
    } else if (launcherwidgetdata == QLatin1String("suspendhybrid")) {
        Solid::PowerManagement::requestSleep(Solid::PowerManagement::HybridSuspendState);
    } else if (launcherwidgetdata == QLatin1String("restart")) {
        KWorkSpace::requestShutDown(KWorkSpace::ShutdownConfirmDefault, KWorkSpace::ShutdownTypeReboot);
    } else if (launcherwidgetdata == QLatin1String("shutdown")) {
        KWorkSpace::requestShutDown(KWorkSpace::ShutdownConfirmDefault, KWorkSpace::ShutdownTypeHalt);
    } else if (launcherwidgetdata == QLatin1String("logout")) {
        KWorkSpace::requestShutDown(KWorkSpace::ShutdownConfirmDefault, KWorkSpace::ShutdownTypeNone);
    } else {
        Q_ASSERT(false);
        kWarning() << "invalid url" << launcherwidgetdata;
    }
}

void LauncherLeave::slotTimeout()
{
    const bool oldcanswitch = m_canswitch;
    const bool oldcanreboot = m_canreboot;
    const bool oldcanshutdown = m_canshutdown;
    m_canswitch = m_displaymanager.isSwitchable();
    m_canreboot = KWorkSpace::canShutDown(KWorkSpace::ShutdownConfirmDefault, KWorkSpace::ShutdownTypeReboot);
    m_canshutdown = KWorkSpace::canShutDown(KWorkSpace::ShutdownConfirmDefault, KWorkSpace::ShutdownTypeHalt);
    if (oldcanswitch != m_canswitch || oldcanreboot != m_canreboot || oldcanshutdown != m_canshutdown) {
        slotUpdateLayout();
    }
}

void LauncherLeave::slotDelayedSwitch()
{
    m_displaymanager.newSession();
}


class LauncherAppletWidget : public QGraphicsWidget
{
    Q_OBJECT
public:
    LauncherAppletWidget(LauncherApplet* auncherapplet);
    ~LauncherAppletWidget();

    void resetSearch();
    void setAllowedRunners(const QStringList &runners);

private Q_SLOTS:
    void slotSearch(const QString &text);
    void slotUserTimeout();
    void slotSearchTimeout();

private:
    LauncherApplet* m_launcherapplet;
    QGraphicsLinearLayout* m_layout;
    QGraphicsLinearLayout* m_toplayout;
    Plasma::IconWidget* m_iconwidget;
    Plasma::Label* m_label;
    Plasma::LineEdit* m_lineedit;
    Plasma::TabBar* m_tabbar;
    Plasma::ScrollWidget* m_favoritesscrollwidget;
    LauncherFavorites* m_favoriteswidget;
    LauncherApplications* m_applicationswidget;
    Plasma::ScrollWidget* m_recentscrollwidget;
    LauncherRecent* m_recentwidget;
    Plasma::ScrollWidget* m_leavecrollwidget;
    LauncherLeave* m_leavewidget;
    Plasma::ScrollWidget* m_searchscrollwidget;
    LauncherSearch* m_searchwidget;
    KUser* m_user;
    QTimer* m_usertimer;
    QTimer* m_searchtimer;
};

LauncherAppletWidget::LauncherAppletWidget(LauncherApplet* auncherapplet)
    : QGraphicsWidget(auncherapplet),
    m_launcherapplet(auncherapplet),
    m_layout(nullptr),
    m_toplayout(nullptr),
    m_iconwidget(nullptr),
    m_label(nullptr),
    m_lineedit(nullptr),
    m_tabbar(nullptr),
    m_favoritesscrollwidget(nullptr),
    m_favoriteswidget(nullptr),
    m_applicationswidget(nullptr),
    m_recentscrollwidget(nullptr),
    m_recentwidget(nullptr),
    m_leavecrollwidget(nullptr),
    m_leavewidget(nullptr),
    m_searchscrollwidget(nullptr),
    m_searchwidget(nullptr),
    m_user(nullptr),
    m_usertimer(nullptr),
    m_searchtimer(nullptr)
{
    m_layout = new QGraphicsLinearLayout(Qt::Vertical, this);
    m_toplayout = new QGraphicsLinearLayout(Qt::Horizontal, m_layout);
    m_toplayout->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    m_layout->addItem(m_toplayout);

    m_user = new KUser(KUser::UseEffectiveUID);

    m_iconwidget = new Plasma::IconWidget(this);
    m_iconwidget->setAcceptHoverEvents(false);
    m_iconwidget->setAcceptedMouseButtons(Qt::NoButton);
    m_iconwidget->setIcon(s_usericon);
    m_toplayout->addItem(m_iconwidget);

    m_label = new Plasma::Label(this);
    m_label->setWordWrap(false);
    m_toplayout->addItem(m_label);
    m_toplayout->setAlignment(m_label, Qt::AlignCenter);

    m_lineedit = new Plasma::LineEdit(this);
    m_lineedit->setClickMessage(i18n("Search"));
    m_lineedit->setClearButtonShown(true);
    m_toplayout->addItem(m_lineedit);
    m_toplayout->setAlignment(m_lineedit, Qt::AlignCenter);
    setFocusProxy(m_lineedit);

    m_tabbar = new Plasma::TabBar(this);
    m_favoritesscrollwidget = kMakeScrollWidget(m_tabbar);
    m_favoritesscrollwidget->setMinimumSize(s_minimumsize);
    m_favoriteswidget = new LauncherFavorites(m_favoritesscrollwidget, m_launcherapplet);
    m_favoritesscrollwidget->setWidget(m_favoriteswidget);
    m_tabbar->addTab(KIcon(s_favoriteicon), i18n("Favorites"), m_favoritesscrollwidget);
    m_applicationswidget = new LauncherApplications(m_tabbar, m_launcherapplet);
    m_applicationswidget->setMinimumSize(s_minimumsize);
    m_tabbar->addTab(KIcon(s_genericicon), i18n("Applications"), m_applicationswidget);
    m_recentscrollwidget = kMakeScrollWidget(m_tabbar);
    m_recentscrollwidget->setMinimumSize(s_minimumsize);
    m_recentwidget = new LauncherRecent(m_recentscrollwidget, m_launcherapplet);
    m_recentscrollwidget->setWidget(m_recentwidget);
    m_tabbar->addTab(KIcon(s_recenticon), i18n("Recently Used"), m_recentscrollwidget);
    m_leavecrollwidget = kMakeScrollWidget(m_tabbar);
    m_leavecrollwidget->setMinimumSize(s_minimumsize);
    m_leavewidget = new LauncherLeave(m_leavecrollwidget, m_launcherapplet);
    m_leavecrollwidget->setWidget(m_leavewidget);
    m_tabbar->addTab(KIcon("system-shutdown"), i18n("Leave"), m_leavecrollwidget);
    m_layout->addItem(m_tabbar);
    // squeeze the icon
    m_layout->setStretchFactor(m_tabbar, 100);

    m_searchscrollwidget = kMakeScrollWidget(this);
    m_searchscrollwidget->setMinimumSize(s_minimumsize);
    m_searchscrollwidget->setVisible(false);
    m_searchwidget = new LauncherSearch(m_searchscrollwidget, m_launcherapplet);
    m_searchscrollwidget->setWidget(m_searchwidget);
    m_layout->addItem(m_searchscrollwidget);
    connect(
        m_lineedit, SIGNAL(textChanged(QString)),
        this, SLOT(slotSearch(QString))
    );

    m_usertimer = new QTimer(this);
    m_usertimer->setInterval(s_polltimeout);
    connect(
        m_usertimer, SIGNAL(timeout()),
        this, SLOT(slotUserTimeout())
    );
    slotUserTimeout();
    m_usertimer->start();

    m_searchtimer = new QTimer(this);
    m_searchtimer->setSingleShot(true);
    m_searchtimer->setInterval(s_searchdelay);
    connect(
        m_searchtimer, SIGNAL(timeout()),
        this, SLOT(slotSearchTimeout())
    );

    setLayout(m_layout);
}

LauncherAppletWidget::~LauncherAppletWidget()
{
    delete m_user;
}

void LauncherAppletWidget::resetSearch()
{
    m_lineedit->setText(QString());
}

void LauncherAppletWidget::setAllowedRunners(const QStringList &runners)
{
    m_searchwidget->setAllowedRunners(runners);
}

void LauncherAppletWidget::slotSearch(const QString &text)
{
    const QString query = text.trimmed();
    if (query.isEmpty()) {
        m_searchtimer->stop();
        m_searchscrollwidget->setVisible(false);
        m_tabbar->setVisible(true);
        return;
    }
    if (!m_searchtimer->isActive()) {
        m_searchwidget->prepare();
    }
    m_searchtimer->start();
}

void LauncherAppletWidget::slotUserTimeout()
{
    const QString hostname = QHostInfo::localHostName();
    QString usericon = m_user->faceIconPath();
    if (usericon.isEmpty()) {
        // from theme
        m_iconwidget->setIcon(KIcon(s_usericon));
    } else {
        // full path with modification time detection
        m_iconwidget->setIcon(QIcon(usericon));
    }

    QString usertext;
    QString fullusername = m_user->property(KUser::FullName);
    if (fullusername.isEmpty()) {
        usertext = i18nc("login name, hostname", "User <b>%1</b> on <b>%2</b>", m_user->loginName(), hostname);
    } else {
        usertext = i18nc("full name, login name, hostname", "<b>%1 (%2)</b> on <b>%3</b>", fullusername, m_user->loginName(), hostname);
    }
    m_label->setText(usertext);
}

void LauncherAppletWidget::slotSearchTimeout()
{
    m_searchwidget->query(m_lineedit->text());
    m_tabbar->setVisible(false);
    m_searchscrollwidget->setVisible(true);
}


LauncherApplet::LauncherApplet(QObject *parent, const QVariantList &args)
    : Plasma::PopupApplet(parent, args),
    m_launcherwidget(nullptr),
    m_bookmarkmanager(nullptr),
    m_editmenuaction(nullptr),
    m_selector(nullptr),
    m_shareconfig(nullptr)
{
    KGlobal::locale()->insertCatalog("plasma_applet_launcher");
    setPopupIcon(s_defaultpopupicon);
    setAspectRatioMode(Plasma::IgnoreAspectRatio);
    setHasConfigurationInterface(true);

    const QString bookmarfile = KStandardDirs::locateLocal("data", "plasma/bookmarks.xml");
    m_bookmarkmanager = KBookmarkManager::managerForFile(bookmarfile, "launcher");
    // m_bookmarkmanager->slotEditBookmarks();
}

void LauncherApplet::init()
{
    Plasma::PopupApplet::init();

    setGlobalShortcut(QKeySequence(Qt::ALT+Qt::Key_F2));
    m_shareconfig = KSharedConfig::openConfig(globalConfig().config()->name());
    m_configgroup = m_shareconfig->group("Plugins");

    m_launcherwidget = new LauncherAppletWidget(this);
    setFocusProxy(m_launcherwidget);
    m_launcherwidget->setAllowedRunners(kAllowedRunners(m_configgroup));
}

QGraphicsWidget* LauncherApplet::graphicsWidget()
{
    return m_launcherwidget;
}

QList<QAction*> LauncherApplet::contextualActions()
{
    QList<QAction*> result;
    const KService::Ptr service = KService::serviceByStorageId("kmenuedit");
    if (!service.isNull()) {
        if (!m_editmenuaction) {
            m_editmenuaction = new QAction(this);
            m_editmenuaction->setText(i18n("Edit Applications..."));
            connect(
                m_editmenuaction, SIGNAL(triggered()),
                this, SLOT(slotEditMenu())
            );
        }
        result.append(m_editmenuaction);
    }
    return result;
}

void LauncherApplet::createConfigurationInterface(KConfigDialog *parent)
{
    QWidget *widget = new QWidget();
    m_selector = new KPluginSelector(widget);
    m_selector->addPlugins(
        Plasma::RunnerManager::listRunnerInfo(),
        KPluginSelector::ReadConfigFile,
        i18n("Available Plugins"), QString(),
        m_shareconfig
    );
    connect(m_selector, SIGNAL(changed(bool)), parent, SLOT(settingsModified()));
    parent->addPage(m_selector, i18n("Runners"), "preferences-plugin");

    connect(parent, SIGNAL(applyClicked()), this, SLOT(slotConfigAccepted()));
    connect(parent, SIGNAL(okClicked()), this, SLOT(slotConfigAccepted()));
}

void LauncherApplet::resetState()
{
    hidePopup();
    m_launcherwidget->resetSearch();
}

KBookmarkManager* LauncherApplet::bookmarkManager() const
{
    return m_bookmarkmanager;
}

void LauncherApplet::slotEditMenu()
{
    if (KToolInvocation::kdeinitExec("kmenuedit") == 0) {
        hidePopup();
    } else {
        showMessage(KIcon("dialog-error"), i18n("Failed to launch menu editor"), Plasma::MessageButton::ButtonOk);
    }
}

void LauncherApplet::slotConfigAccepted()
{
    Q_ASSERT(m_selector != nullptr);
    Q_ASSERT(m_shareconfig != nullptr);
    m_selector->save();
    m_configgroup.sync();
    m_shareconfig->sync();
    m_launcherwidget->setAllowedRunners(kAllowedRunners(m_configgroup));
    m_launcherwidget->resetSearch();
    emit configNeedsSaving();
}

#include "launcher.moc"
#include "moc_launcher.cpp"