mainwidget.cpp

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/*
    This file is part of Akregator.

    Copyright (C) 2004 Stanislav Karchebny <Stanislav.Karchebny@kdemail.net>
                  2004 Sashmit Bhaduri <smt@vfemail.net>
                  2005 Frank Osterfeld <osterfeld@kde.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

    As a special exception, permission is given to link this program
    with any edition of Qt, and distribute the resulting executable,
    without including the source code for Qt in the source distribution.
*/

#include "mainwidget.h"
#include "actionmanagerimpl.h"
#include "addfeeddialog.h"
#include "articlelistview.h"
#include "articleviewer.h"
#include "articlejobs.h"
#include "akregatorconfig.h"
#include "akregator_part.h"
#include "browserframe.h"
#include "createfeedcommand.h"
#include "createfoldercommand.h"
#include "deletesubscriptioncommand.h"
#include "editsubscriptioncommand.h"
#include "expireitemscommand.h"
#include "importfeedlistcommand.h"
#include "feed.h"
#include "feedlist.h"
#include "feedpropertiesdialog.h"
#include "fetchqueue.h"
#include "folder.h"
#include "framemanager.h"
#include "kernel.h"
#include "notificationmanager.h"
#include "openurlrequest.h"
#include "progressmanager.h"
#include "searchbar.h"
#include "selectioncontroller.h"
#include "speechclient.h"
#include "subscriptionlistjobs.h"
#include "subscriptionlistmodel.h"
#include "subscriptionlistview.h"
#include "tabwidget.h"
#include "treenode.h"
#include "treenodevisitor.h"
#include "types.h"
#include <solid/networking.h>

#include <kaction.h>
#include <kdialog.h>
#include <KDebug>
#include <kfiledialog.h>
#include <kfileitem.h>
#include <kiconloader.h>
#include <kinputdialog.h>
#include <klocale.h>
#include <kmessagebox.h>
#include <krandom.h>
#include <kshell.h>
#include <kstandarddirs.h>
#include <ktoggleaction.h>
#include <ktoolinvocation.h>
#include <kurl.h>

#include <QClipboard>
#include <QSplitter>
#include <QTextDocument>
#include <QDomDocument>
#include <QTimer>

#include <algorithm>
#include <memory>
#include <cassert>

using namespace boost;
using namespace Akregator;
using namespace Solid;

Akregator::MainWidget::~MainWidget()
{
    // if m_shuttingDown is false, slotOnShutdown was not called. That
     // means that not the whole app is shutdown, only the part. So it
    // should be no risk to do the cleanups now
    if (!m_shuttingDown)
        slotOnShutdown();
}

Akregator::MainWidget::MainWidget( Part *part, QWidget *parent, ActionManagerImpl* actionManager, const char *name)
     : QWidget(parent),
     m_feedList(),
     m_viewMode(NormalView),
     m_actionManager(actionManager),
     m_feedListManagementInterface( new FeedListManagementImpl )
{
    setObjectName(name);

    FeedListManagementInterface::setInstance( m_feedListManagementInterface );

    m_actionManager->initMainWidget(this);
    m_actionManager->initFrameManager(Kernel::self()->frameManager());
    m_part = part;
    m_shuttingDown = false;
    m_displayingAboutPage = false;
    setFocusPolicy(Qt::StrongFocus);

    QVBoxLayout *lt = new QVBoxLayout( this );
    lt->setMargin(0);

    m_horizontalSplitter = new QSplitter(Qt::Horizontal, this);

    m_horizontalSplitter->setOpaqueResize(true);
    lt->addWidget(m_horizontalSplitter);

    connect(Kernel::self()->fetchQueue(), SIGNAL(signalStarted()),
             this, SLOT(slotFetchingStarted()));
    connect(Kernel::self()->fetchQueue(), SIGNAL(signalStopped()),
             this, SLOT(slotFetchingStopped()));

    m_feedListView = new SubscriptionListView( m_horizontalSplitter );
    m_feedListView->setObjectName( "feedtree" );
    m_actionManager->initSubscriptionListView( m_feedListView );

    connect( m_feedListView, SIGNAL(userActionTakingPlace()),
             this, SLOT(ensureArticleTabVisible()) );

    // FIXME:
    // connect(m_feedListView, SIGNAL(signalDropped (KUrl::List &, Akregator::TreeNode*,
    //         Akregator::Folder*)),
    //         this, SLOT(slotFeedUrlDropped (KUrl::List &,
    //         Akregator::TreeNode*, Akregator::Folder*)));

    m_tabWidget = new TabWidget(m_horizontalSplitter);
    m_actionManager->initTabWidget(m_tabWidget);

    connect( m_part, SIGNAL(signalSettingsChanged()),
             m_tabWidget, SLOT(slotSettingsChanged()));

    connect( m_tabWidget, SIGNAL(signalCurrentFrameChanged(int)),
             Kernel::self()->frameManager(), SLOT(slotChangeFrame(int)));

    connect( m_tabWidget, SIGNAL(signalRemoveFrameRequest(int)),
             Kernel::self()->frameManager(), SLOT(slotRemoveFrame(int)));

    connect( m_tabWidget, SIGNAL(signalOpenUrlRequest(Akregator::OpenUrlRequest&)),
             Kernel::self()->frameManager(), SLOT(slotOpenUrlRequest(Akregator::OpenUrlRequest&)));

    connect( Kernel::self()->frameManager(), SIGNAL(signalFrameAdded(Akregator::Frame*)),
             m_tabWidget, SLOT(slotAddFrame(Akregator::Frame*)));

    connect( Kernel::self()->frameManager(), SIGNAL(signalSelectFrame(int)),
             m_tabWidget, SLOT(slotSelectFrame(int)) );

    connect( Kernel::self()->frameManager(), SIGNAL(signalFrameRemoved(int)),
             m_tabWidget, SLOT(slotRemoveFrame(int)));

    connect( Kernel::self()->frameManager(), SIGNAL(signalRequestNewFrame(int&)),
             this, SLOT(slotRequestNewFrame(int&)) );

    connect( Kernel::self()->frameManager(), SIGNAL(signalFrameAdded(Akregator::Frame*)),
             this, SLOT(slotFramesChanged()));
    connect( Kernel::self()->frameManager(), SIGNAL(signalFrameRemoved(int)),
             this, SLOT(slotFramesChanged()));
    connect( Solid::Networking::notifier(), SIGNAL(statusChanged(Solid::Networking::Status)),
             this,SLOT(slotNetworkStatusChanged(Solid::Networking::Status)));

    m_tabWidget->setWhatsThis( i18n("You can view multiple articles in several open tabs."));

    m_mainTab = new QWidget(this);
    m_mainTab->setObjectName("Article Tab");
    m_mainTab->setWhatsThis( i18n("Articles list."));

    QVBoxLayout *mainTabLayout = new QVBoxLayout( m_mainTab);
    mainTabLayout->setMargin(0);

    m_searchBar = new SearchBar(m_mainTab);
    if ( !Settings::showQuickFilter() )
        m_searchBar->hide();

    mainTabLayout->addWidget(m_searchBar);

    m_articleSplitter = new QSplitter(Qt::Vertical, m_mainTab);
    m_articleSplitter->setObjectName("panner2");

    m_articleListView = new ArticleListView( m_articleSplitter );
    connect( m_articleListView, SIGNAL(userActionTakingPlace()),
             this, SLOT(ensureArticleTabVisible()) );

    m_selectionController = new SelectionController( this );
    m_selectionController->setArticleLister( m_articleListView );
    m_selectionController->setFeedSelector( m_feedListView );

    connect(m_searchBar, SIGNAL(signalSearch(std::vector<boost::shared_ptr<const Akregator::Filters::AbstractMatcher> >)),
            m_selectionController, SLOT(setFilters(std::vector<boost::shared_ptr<const Akregator::Filters::AbstractMatcher> >)) );

    FolderExpansionHandler* expansionHandler = new FolderExpansionHandler( this );
    connect( m_feedListView, SIGNAL(expanded(QModelIndex)), expansionHandler, SLOT(itemExpanded(QModelIndex)) );
    connect( m_feedListView, SIGNAL(collapsed(QModelIndex)), expansionHandler, SLOT(itemCollapsed(QModelIndex)) );

    m_selectionController->setFolderExpansionHandler( expansionHandler );

    connect( m_selectionController, SIGNAL(currentSubscriptionChanged(Akregator::TreeNode*)),
             this, SLOT(slotNodeSelected(Akregator::TreeNode*)) );

    connect( m_selectionController, SIGNAL(currentArticleChanged(Akregator::Article)),
             this, SLOT(slotArticleSelected(Akregator::Article)) );

    connect( m_selectionController, SIGNAL(articleDoubleClicked(Akregator::Article)),
             this, SLOT(slotOpenArticleInBrowser(Akregator::Article)) );

    m_actionManager->initArticleListView(m_articleListView);

    connect( m_articleListView, SIGNAL(signalMouseButtonPressed(int,KUrl)),
             this, SLOT(slotMouseButtonPressed(int,KUrl)));

/*
    connect( m_part, SIGNAL(signalSettingsChanged()),
             m_articleListView, SLOT(slotPaletteOrFontChanged()));
*/

    m_articleViewer = new ArticleViewer(m_articleSplitter);
    m_actionManager->initArticleViewer(m_articleViewer);
    m_articleListView->setFocusProxy(m_articleViewer);
    setFocusProxy( m_articleViewer );

    connect( m_articleViewer, SIGNAL(signalOpenUrlRequest(Akregator::OpenUrlRequest&)),
             Kernel::self()->frameManager(), SLOT(slotOpenUrlRequest(Akregator::OpenUrlRequest&)) );
    connect( m_articleViewer->part()->browserExtension(), SIGNAL(mouseOverInfo(KFileItem)),
             this, SLOT(slotMouseOverInfo(KFileItem)) );
    connect( m_part, SIGNAL(signalSettingsChanged()),
             m_articleViewer, SLOT(slotPaletteOrFontChanged()));
    connect(m_searchBar, SIGNAL(signalSearch(std::vector<boost::shared_ptr<const Akregator::Filters::AbstractMatcher> >)),
            m_articleViewer, SLOT(setFilters(std::vector<boost::shared_ptr<const Akregator::Filters::AbstractMatcher> >)) );

    m_articleViewer->part()->widget()->setWhatsThis( i18n("Browsing area."));

    mainTabLayout->addWidget( m_articleSplitter );

    m_mainFrame = new MainFrame( this, m_part, m_mainTab );
    m_mainFrame->slotSetTitle( i18n("Articles") );
    Kernel::self()->frameManager()->slotAddFrame(m_mainFrame);

    const QList<int> sp1sizes = Settings::splitter1Sizes();
    if ( sp1sizes.count() >= m_horizontalSplitter->count() )
        m_horizontalSplitter->setSizes( sp1sizes );
    const QList<int> sp2sizes = Settings::splitter2Sizes();
    if ( sp2sizes.count() >= m_articleSplitter->count() )
        m_articleSplitter->setSizes( sp2sizes );

    KConfigGroup conf(Settings::self()->config(), "General");
    if(!conf.readEntry("Disable Introduction", false))
    {
        m_articleListView->hide();
        m_searchBar->hide();
        m_articleViewer->displayAboutPage();
        m_mainFrame->slotSetTitle(i18n("About"));
        m_displayingAboutPage = true;
    }

    m_fetchTimer = new QTimer(this);
    connect( m_fetchTimer, SIGNAL(timeout()),
             this, SLOT(slotDoIntervalFetches()) );
    m_fetchTimer->start(1000*60);

    // delete expired articles once per hour
    m_expiryTimer = new QTimer(this);
    connect(m_expiryTimer, SIGNAL(timeout()),
            this, SLOT(slotDeleteExpiredArticles()) );
    m_expiryTimer->start(3600*1000);

    m_markReadTimer = new QTimer(this);
    m_markReadTimer->setSingleShot(true);
    connect(m_markReadTimer, SIGNAL(timeout()), this, SLOT(slotSetCurrentArticleReadDelayed()) );

    setFeedList( shared_ptr<FeedList>( new FeedList( Kernel::self()->storage() ) ) );

    switch (Settings::viewMode())
    {
        case CombinedView:
            slotCombinedView();
            break;
        case WidescreenView:
            slotWidescreenView();
            break;
        default:
            slotNormalView();
    }

    if ( !Settings::resetQuickFilterOnNodeChange() )
    {
        m_searchBar->slotSetStatus( Settings::statusFilter() );
        m_searchBar->slotSetText( Settings::textFilter() );
    }

        //Check network status
    if(Solid::Networking::status() == Solid::Networking::Connected || Solid::Networking::status() == Solid::Networking::Unknown)
     this->m_networkAvailable=true;
    else if(Solid::Networking::status() == Solid::Networking::Unconnected)
      this->m_networkAvailable=false;
}

void Akregator::MainWidget::slotOnShutdown()
{
    m_shuttingDown = true;

    // close all pageviewers in a controlled way
    // fixes bug 91660, at least when no part loading data
    while ( m_tabWidget->count() > 1 ) { // remove frames until only the main frame remains
        m_tabWidget->setCurrentIndex( m_tabWidget->count() - 1 ); // select last page
        m_tabWidget->slotRemoveCurrentFrame();
    }

    Kernel::self()->fetchQueue()->slotAbort();
    setFeedList( shared_ptr<FeedList>() );

    delete m_feedListManagementInterface;
    delete m_feedListView; // call delete here, so that the header settings will get saved
    delete m_articleListView; // same for this one

    delete m_mainTab;
    delete m_mainFrame;
    m_mainFrame = 0;

    Settings::self()->writeConfig();
}


void Akregator::MainWidget::saveSettings()
{
    const QList<int> spl1 = m_horizontalSplitter->sizes();
    if ( std::count( spl1.begin(), spl1.end(), 0 ) == 0 )
        Settings::setSplitter1Sizes( spl1 );
    const QList<int> spl2 = m_articleSplitter->sizes();
    if ( std::count( spl2.begin(), spl2.end(), 0 ) == 0 )
        Settings::setSplitter2Sizes( spl2 );
    Settings::setViewMode( m_viewMode );
    Settings::self()->writeConfig();
}


void Akregator::MainWidget::slotRequestNewFrame(int& frameId)
{
    BrowserFrame* frame = new BrowserFrame(m_tabWidget);

    connect( m_part, SIGNAL(signalSettingsChanged()), frame, SLOT(slotPaletteOrFontChanged()));
    connect( m_tabWidget, SIGNAL(signalZoomInFrame(int)), frame, SLOT(slotZoomIn(int)));
    connect( m_tabWidget, SIGNAL(signalZoomOutFrame(int)), frame, SLOT(slotZoomOut(int)));

    Kernel::self()->frameManager()->slotAddFrame(frame);

    frameId = frame->id();
}

void Akregator::MainWidget::sendArticle(bool attach)
{
    QByteArray text;
    QString title;

    Frame* frame = Kernel::self()->frameManager()->currentFrame();

    if (frame && frame->id() > 0) { // are we in some other tab than the articlelist?
        text = frame->url().prettyUrl().toLatin1();
        title = frame->title();
    }
    else { // nah, we're in articlelist..
         const Article article =  m_selectionController->currentArticle();
         if(!article.isNull()) {
             text = article.link().prettyUrl().toLatin1();
             title = article.title();
         }
    }

    if(text.isEmpty())
        return;

    if(attach)
    {
        KToolInvocation::invokeMailer(QString(),
                           QString(),
                           QString(),
                           title,
                           QString(),
                           QString(),
                           QStringList(text),
                           text);
    }
    else
    {
        KToolInvocation::invokeMailer(QString(),
                           QString(),
                           QString(),
                           title,
                           text,
                           QString(),
                           QStringList(),
                           text);
    }
}

void MainWidget::importFeedList( const QDomDocument& doc )
{
    std::auto_ptr<ImportFeedListCommand> cmd( new ImportFeedListCommand );
    cmd->setParentWidget( this );
    cmd->setFeedListDocument( doc );
    cmd->setTargetList( m_feedList );
    cmd.release()->start();
}

void Akregator::MainWidget::setFeedList( const shared_ptr<FeedList>& list )
{
    if ( list == m_feedList )
        return;
    const shared_ptr<FeedList> oldList = m_feedList;

    m_feedList = list;
    if ( m_feedList ) {
        connect( m_feedList.get(), SIGNAL(unreadCountChanged(int)),
                 this, SLOT(slotSetTotalUnread()) );
    }

    slotSetTotalUnread();

    m_feedListManagementInterface->setFeedList( m_feedList );
    Kernel::self()->setFeedList( m_feedList );
    ProgressManager::self()->setFeedList( m_feedList );
    m_selectionController->setFeedList( m_feedList );

    if ( oldList )
        oldList->disconnect( this );

    slotDeleteExpiredArticles();
}

void Akregator::MainWidget::deleteExpiredArticles( const shared_ptr<FeedList>& list )
{
    if ( !list )
        return;
    ExpireItemsCommand* cmd = new ExpireItemsCommand( this );
    cmd->setParentWidget( this );
    cmd->setFeedList( list );
    cmd->setFeeds( list->feedIds() );
    cmd->start();
}

void Akregator::MainWidget::slotDeleteExpiredArticles()
{
    deleteExpiredArticles( m_feedList );
}

QDomDocument Akregator::MainWidget::feedListToOPML()
{
    QDomDocument dom;
    if ( m_feedList ) {
        dom = m_feedList->toOpml();
    }
    return dom;
}

void Akregator::MainWidget::addFeedToGroup(const QString& url, const QString& groupName)
{
    // Locate the group.
    QList<TreeNode *> namedGroups = m_feedList->findByTitle( groupName );
    Folder* group = 0;
    foreach( TreeNode* const candidate, namedGroups ) {
        if ( candidate->isGroup() ) {
            group =  static_cast<Folder*>( candidate );
            break;
        }
    }

    if (!group)
    {
        Folder* g = new Folder( groupName );
        m_feedList->allFeedsFolder()->appendChild(g);
        group = g;
    }

    // Invoke the Add Feed dialog with url filled in.
    addFeed(url, 0, group, true);
}

void Akregator::MainWidget::slotNormalView()
{
    if (m_viewMode == NormalView)
        return;

    if (m_viewMode == CombinedView)
    {
        m_articleListView->show();

        const Article article =  m_selectionController->currentArticle();

        if (!article.isNull())
            m_articleViewer->showArticle(article);
        else
            m_articleViewer->slotShowSummary( m_selectionController->selectedSubscription() );
    }

    m_articleSplitter->setOrientation(Qt::Vertical);
    m_viewMode = NormalView;

    Settings::setViewMode( m_viewMode );
}

void Akregator::MainWidget::slotWidescreenView()
{
    if (m_viewMode == WidescreenView)
        return;

    if (m_viewMode == CombinedView)
    {
        m_articleListView->show();

        Article article =  m_selectionController->currentArticle();

        if (!article.isNull())
            m_articleViewer->showArticle(article);
        else
            m_articleViewer->slotShowSummary( m_selectionController->selectedSubscription() );
    }

    m_articleSplitter->setOrientation(Qt::Horizontal);
    m_viewMode = WidescreenView;

    Settings::setViewMode( m_viewMode );
}

void Akregator::MainWidget::slotCombinedView()
{
    if (m_viewMode == CombinedView)
        return;

    m_articleListView->slotClear();
    m_articleListView->hide();
    m_viewMode = CombinedView;

    Settings::setViewMode( m_viewMode );
}

void Akregator::MainWidget::slotMoveCurrentNodeUp()
{
    TreeNode* current = m_selectionController->selectedSubscription();
    if (!current)
        return;
    TreeNode* prev = current->prevSibling();
    Folder* parent = current->parent();

    if (!prev || !parent)
        return;

    parent->removeChild(prev);
    parent->insertChild(prev, current);
    m_feedListView->ensureNodeVisible(current);
}

void Akregator::MainWidget::slotMoveCurrentNodeDown()
{
    TreeNode* current = m_selectionController->selectedSubscription();
    if (!current)
        return;
    TreeNode* next = current->nextSibling();
    Folder* parent = current->parent();

    if (!next || !parent)
        return;

    parent->removeChild(current);
    parent->insertChild(current, next);
    m_feedListView->ensureNodeVisible(current);
}

void Akregator::MainWidget::slotMoveCurrentNodeLeft()
{
    TreeNode* current = m_selectionController->selectedSubscription();
    if (!current || !current->parent() || !current->parent()->parent())
        return;

    Folder* parent = current->parent();
    Folder* grandparent = current->parent()->parent();

    parent->removeChild(current);
    grandparent->insertChild(current, parent);
    m_feedListView->ensureNodeVisible(current);
}

void Akregator::MainWidget::slotMoveCurrentNodeRight()
{
    TreeNode* current = m_selectionController->selectedSubscription();
    if (!current || !current->parent())
        return;
    TreeNode* prev = current->prevSibling();

    if ( prev && prev->isGroup() )
    {
        Folder* fg = static_cast<Folder*>(prev);
        current->parent()->removeChild(current);
        fg->appendChild(current);
        m_feedListView->ensureNodeVisible(current);
    }
}

void Akregator::MainWidget::slotNodeSelected(TreeNode* node)
{
    m_markReadTimer->stop();

    if (m_displayingAboutPage)
    {
        m_mainFrame->slotSetTitle(i18n("Articles"));
        if (m_viewMode != CombinedView)
            m_articleListView->show();
        if (Settings::showQuickFilter())
            m_searchBar->show();
        m_displayingAboutPage = false;
    }

    m_tabWidget->setCurrentWidget( m_mainFrame );
    if ( Settings::resetQuickFilterOnNodeChange() )
        m_searchBar->slotClearSearch();

    if (m_viewMode == CombinedView)
    {
        m_articleViewer->showNode(node);
    }
    else
    {
        m_articleViewer->slotShowSummary(node);
    }

    if (node)
       m_mainFrame->setWindowTitle(node->title());

    m_actionManager->slotNodeSelected(node);
}


void Akregator::MainWidget::slotFeedAdd()
{
    Folder* group = 0;
    if ( !m_selectionController->selectedSubscription() )
        group = m_feedList->allFeedsFolder();
    else
    {
        if ( m_selectionController->selectedSubscription()->isGroup())
            group = static_cast<Folder*>( m_selectionController->selectedSubscription() );
        else
            group= m_selectionController->selectedSubscription()->parent();

    }

    TreeNode* const lastChild = !group->children().isEmpty() ? group->children().last() : 0;

    addFeed(QString::null, lastChild, group, false);        //krazy:exclude=nullstrassign for old broken gcc
}

void Akregator::MainWidget::addFeed(const QString& url, TreeNode *after, Folder* parent, bool autoExec)
{
    CreateFeedCommand* cmd( new CreateFeedCommand( this ) );
    cmd->setParentWidget( this );
    cmd->setPosition( parent, after );
    cmd->setRootFolder( m_feedList->allFeedsFolder() );
    cmd->setAutoExecute( autoExec );
    cmd->setUrl( url );
    cmd->setSubscriptionListView( m_feedListView );
    cmd->start();
}

void Akregator::MainWidget::slotFeedAddGroup()
{
    CreateFolderCommand* cmd = new CreateFolderCommand( this );
    cmd->setParentWidget( this );
    cmd->setSelectedSubscription( m_selectionController->selectedSubscription() );
    cmd->setRootFolder( m_feedList->allFeedsFolder() );
    cmd->setSubscriptionListView( m_feedListView );
    cmd->start();
}

void Akregator::MainWidget::slotFeedRemove()
{
    TreeNode* selectedNode = m_selectionController->selectedSubscription();

    // don't delete root element! (safety valve)
    if (!selectedNode || selectedNode == m_feedList->allFeedsFolder())
        return;

    DeleteSubscriptionCommand* cmd = new DeleteSubscriptionCommand( this );
    cmd->setParentWidget( this );
    cmd->setSubscription( m_feedList, selectedNode->id() );
    cmd->start();
}

void Akregator::MainWidget::slotFeedModify()
{
    TreeNode* const node = m_selectionController->selectedSubscription();
    if ( !node )
        return;
    EditSubscriptionCommand* cmd = new EditSubscriptionCommand( this );
    cmd->setParentWidget( this );
    cmd->setSubscription( m_feedList, node->id() );
    cmd->setSubscriptionListView( m_feedListView );
    cmd->start();
}

void Akregator::MainWidget::slotNextUnreadArticle()
{
    ensureArticleTabVisible();
    if (m_viewMode == CombinedView)
    {
        m_feedListView->slotNextUnreadFeed();
        return;
    }
    TreeNode* sel = m_selectionController->selectedSubscription();
    if (sel && sel->unread() > 0)
        m_articleListView->slotNextUnreadArticle();
    else
        m_feedListView->slotNextUnreadFeed();
}

void Akregator::MainWidget::slotPrevUnreadArticle()
{
    ensureArticleTabVisible();
    if (m_viewMode == CombinedView)
    {
        m_feedListView->slotPrevUnreadFeed();
        return;
    }
    TreeNode* sel = m_selectionController->selectedSubscription();
    if (sel && sel->unread() > 0)
        m_articleListView->slotPreviousUnreadArticle();
    else
        m_feedListView->slotPrevUnreadFeed();
}

void Akregator::MainWidget::slotMarkAllFeedsRead()
{
    KJob* job = m_feedList->createMarkAsReadJob();
    connect(job, SIGNAL(finished(KJob*)), m_selectionController, SLOT(forceFilterUpdate()) );
    job->start();
}

void Akregator::MainWidget::slotMarkAllRead()
{
    if(!m_selectionController->selectedSubscription())
        return;
    KJob* job = m_selectionController->selectedSubscription()->createMarkAsReadJob();
    connect(job, SIGNAL(finished(KJob*)), m_selectionController, SLOT(forceFilterUpdate()) );
    job->start();
}

void Akregator::MainWidget::slotSetTotalUnread()
{
    emit signalUnreadCountChanged( m_feedList ? m_feedList->unread() : 0 );
}

void Akregator::MainWidget::slotDoIntervalFetches()
{
    if ( !m_feedList )
        return;
#if 0
    // the following solid check apparently doesn't work reliably and causes
    // interval fetching not working although the user is actually online (but solid reports he's not
    const Networking::Status status = Solid::Networking::status();
    if ( status != Networking::Connected && status != Networking::Unknown )
        return;
#endif
    m_feedList->addToFetchQueue(Kernel::self()->fetchQueue(), true);
}

void Akregator::MainWidget::slotFetchCurrentFeed()
{
    if ( !m_selectionController->selectedSubscription())
        return;
    if(isNetworkAvailable())
      m_selectionController->selectedSubscription()->slotAddToFetchQueue(Kernel::self()->fetchQueue());
    else
      m_mainFrame->slotSetStatusText(i18n("Networking is not available."));
}

void Akregator::MainWidget::slotFetchAllFeeds()
{
    if ( m_feedList && isNetworkAvailable() )
        m_feedList->addToFetchQueue( Kernel::self()->fetchQueue() );
    else if (m_feedList)
        m_mainFrame->slotSetStatusText(i18n("Networking is not available."));
}

void Akregator::MainWidget::slotFetchingStarted()
{
    m_mainFrame->slotSetState(Frame::Started);
    m_actionManager->action("feed_stop")->setEnabled(true);
    m_mainFrame->slotSetStatusText(i18n("Fetching Feeds..."));
}

void Akregator::MainWidget::slotFetchingStopped()
{
    m_mainFrame->slotSetState(Frame::Completed);
    m_actionManager->action("feed_stop")->setEnabled(false);
    m_mainFrame->slotSetStatusText(QString());
}

void Akregator::MainWidget::slotArticleSelected(const Akregator::Article& article)
{
    if (m_viewMode == CombinedView)
        return;

    m_markReadTimer->stop();

    assert( article.isNull() || article.feed() );

    QList<Article> articles = m_selectionController->selectedArticles();
    emit signalArticlesSelected( articles );

    KToggleAction* const maai = qobject_cast<KToggleAction*>( m_actionManager->action( "article_set_status_important" ) );
    assert( maai );
    maai->setChecked( article.keep() );

    m_articleViewer->showArticle( article );
    if (m_selectionController->selectedArticles().count() == 0) {
        m_articleListView->setCurrentIndex(m_selectionController->currentArticleIndex());
    }

    if ( article.isNull() || article.status() == Akregator::Read )
        return;

    if ( !Settings::useMarkReadDelay() )
        return;

    const int delay = Settings::markReadDelay();

    if ( delay > 0 )
    {
        m_markReadTimer->start( delay * 1000 );
    }
    else
    {
        Akregator::ArticleModifyJob* job = new Akregator::ArticleModifyJob;
        const Akregator::ArticleId aid = { article.feed()->xmlUrl(), article.guid() };
        job->setStatus( aid, Akregator::Read );
        job->start();
    }
}

void Akregator::MainWidget::slotMouseButtonPressed(int button, const KUrl& url)
{
    if (button != Qt::MidButton)
        return;

    if (!url.isValid())
        return;

    OpenUrlRequest req(url);

    switch (Settings::mMBBehaviour())
    {
        case Settings::EnumMMBBehaviour::OpenInExternalBrowser:
            req.setOptions(OpenUrlRequest::ExternalBrowser);
            break;
        case Settings::EnumMMBBehaviour::OpenInBackground:
            req.setOptions(OpenUrlRequest::NewTab);
            req.setOpenInBackground(true);
            break;
        default:
            req.setOptions(OpenUrlRequest::NewTab);
            req.setOpenInBackground(false);
    }

    Kernel::self()->frameManager()->slotOpenUrlRequest(req);
}

void Akregator::MainWidget::slotOpenHomepage()
{
    Feed* feed = dynamic_cast<Feed *>( m_selectionController->selectedSubscription() );

    if (!feed)
        return;

    KUrl url(feed->htmlUrl());

    if (url.isValid())
    {
        OpenUrlRequest req(feed->htmlUrl());
        req.setOptions(OpenUrlRequest::ExternalBrowser);
        Kernel::self()->frameManager()->slotOpenUrlRequest(req);
    }
}

void Akregator::MainWidget::slotOpenSelectedArticlesInBrowser()
{
    const QList<Article> articles = m_selectionController->selectedArticles();

    Q_FOREACH( const Akregator::Article& article, articles )
        slotOpenArticleInBrowser( article );
}

void Akregator::MainWidget::slotOpenArticleInBrowser(const Akregator::Article& article)
{
    if (!article.isNull() && article.link().isValid())
    {
        OpenUrlRequest req(article.link());
        req.setOptions(OpenUrlRequest::ExternalBrowser);
        Kernel::self()->frameManager()->slotOpenUrlRequest(req);
    }
}


void Akregator::MainWidget::openSelectedArticles( bool openInBackground )
{
    const QList<Article> articles = m_selectionController->selectedArticles();

    Q_FOREACH( const Akregator::Article& article, articles )
    {
        const KUrl url = article.link();
        if ( !url.isValid() )
          continue;

        OpenUrlRequest req( url );
        req.setOptions( OpenUrlRequest::NewTab );
        if( openInBackground ) {
            req.setOpenInBackground( true );
            Kernel::self()->frameManager()->slotOpenUrlRequest( req, false /*don't use settings for open in background*/ );
        } else {
            Kernel::self()->frameManager()->slotOpenUrlRequest( req );
        }
    }

}

void Akregator::MainWidget::slotCopyLinkAddress()
{
    const Article article =  m_selectionController->currentArticle();

    if(article.isNull())
       return;

    QString link;
    if (article.link().isValid())
    {
        link = article.link().url();
        QClipboard *cb = QApplication::clipboard();
        cb->setText(link, QClipboard::Clipboard);
        // don't set url to selection as it's a no-no according to a fd.o spec
        //cb->setText(link, QClipboard::Selection);
    }
}

void Akregator::MainWidget::slotFeedUrlDropped(KUrl::List &urls, TreeNode* after, Folder* parent)
{
    Q_FOREACH ( const KUrl& i, urls )
        addFeed( i.prettyUrl(), after, parent, false );
}

void Akregator::MainWidget::slotToggleShowQuickFilter()
{
    if ( Settings::showQuickFilter() )
    {
        Settings::setShowQuickFilter(false);
        m_searchBar->slotClearSearch();
        m_searchBar->hide();
    }
    else
    {
        Settings::setShowQuickFilter(true);
        if (!m_displayingAboutPage)
            m_searchBar->show();
    }

}

void Akregator::MainWidget::slotArticleDelete()
{

    if ( m_viewMode == CombinedView )
        return;

    const QList<Article> articles = m_selectionController->selectedArticles();

    QString msg;
    switch (articles.count())
    {
        case 0:
            return;
        case 1:
            msg = i18n("<qt>Are you sure you want to delete article <b>%1</b>?</qt>", Qt::escape(articles.first().title()));
            break;
        default:
            msg = i18np("<qt>Are you sure you want to delete the selected article?</qt>", "<qt>Are you sure you want to delete the %1 selected articles?</qt>", articles.count());
    }

    if ( KMessageBox::warningContinueCancel( this,
                                             msg, i18n( "Delete Article" ),
                                             KStandardGuiItem::del(),
                                             KStandardGuiItem::cancel(),
                                             "Disable delete article confirmation" ) != KMessageBox::Continue )
        return;

    TreeNode* const selected = m_selectionController->selectedSubscription();

    if ( selected )
        selected->setNotificationMode( false );

    Akregator::ArticleDeleteJob* job = new Akregator::ArticleDeleteJob;
    Q_FOREACH( const Akregator::Article& i, articles )
    {
        Feed* const feed = i.feed();
        if ( !feed )
            continue;
        const Akregator::ArticleId aid = { feed->xmlUrl(), i.guid() };
        job->appendArticleId( aid );
    }

    job->start();

    if ( selected )
        selected->setNotificationMode( true );
}

void Akregator::MainWidget::slotFramesChanged()
{
    // We need to wait till the frame is fully loaded
    QMetaObject::invokeMethod( m_part, "slotAutoSave", Qt::QueuedConnection );
}

void Akregator::MainWidget::slotArticleToggleKeepFlag( bool )
{
    const QList<Article> articles = m_selectionController->selectedArticles();

    if (articles.isEmpty())
        return;

    bool allFlagsSet = true;
    Q_FOREACH ( const Akregator::Article& i, articles )
    {
        allFlagsSet = allFlagsSet && i.keep();
        if ( !allFlagsSet )
            break;
    }

    Akregator::ArticleModifyJob* job = new Akregator::ArticleModifyJob;
    Q_FOREACH ( const Akregator::Article& i, articles )
    {
        const Akregator::ArticleId aid = { i.feed()->xmlUrl(), i.guid() };
        job->setKeep( aid, !allFlagsSet );
    }
    job->start();
}

namespace {

void setSelectedArticleStatus( const Akregator::AbstractSelectionController* controller, int status )
{
    const QList<Akregator::Article> articles = controller->selectedArticles();

    if (articles.isEmpty())
        return;

    Akregator::ArticleModifyJob* job = new Akregator::ArticleModifyJob;
    Q_FOREACH ( const Akregator::Article& i, articles )
    {
        const Akregator::ArticleId aid = { i.feed()->xmlUrl(), i.guid() };
        job->setStatus( aid, status );
    }
    job->start();
}

}

void Akregator::MainWidget::slotSetSelectedArticleRead()
{
    ::setSelectedArticleStatus( m_selectionController, Akregator::Read );
}

void Akregator::MainWidget::slotTextToSpeechRequest()
{

    if (Kernel::self()->frameManager()->currentFrame() == m_mainFrame)
    {
        if (m_viewMode != CombinedView)
        {
            // in non-combined view, read selected articles
            SpeechClient::self()->slotSpeak(m_selectionController->selectedArticles());
            // TODO: if article viewer has a selection, read only the selected text?
        }
        else
        {
            if (m_selectionController->selectedSubscription())
            {
                //TODO: read articles in current node, respecting quick filter!
            }
        }
    }
    else
    {
        // TODO: read selected page viewer
    }
}

void Akregator::MainWidget::slotSetSelectedArticleUnread()
{
    ::setSelectedArticleStatus( m_selectionController, Akregator::Unread );
}

void Akregator::MainWidget::slotSetSelectedArticleNew()
{
    ::setSelectedArticleStatus( m_selectionController, Akregator::New );
}

void Akregator::MainWidget::slotSetCurrentArticleReadDelayed()
{
    const Article article =  m_selectionController->currentArticle();

    if (article.isNull())
        return;

    Akregator::ArticleModifyJob* const job = new Akregator::ArticleModifyJob;
    const Akregator::ArticleId aid = { article.feed()->xmlUrl(), article.guid() };
    job->setStatus( aid, Akregator::Read );
    job->start();
}

void Akregator::MainWidget::slotMouseOverInfo(const KFileItem& kifi)
{
    m_mainFrame->slotSetStatusText( kifi.isNull() ? QString() : kifi.url().prettyUrl() );
}

void Akregator::MainWidget::readProperties(const KConfigGroup &config)
{
    if ( !Settings::resetQuickFilterOnNodeChange() )
    {
        // read filter settings
        m_searchBar->slotSetText(config.readEntry("searchLine"));
        m_searchBar->slotSetStatus(config.readEntry("searchCombo").toInt());
    }
    // Reopen tabs
    QStringList childList = config.readEntry( QString::fromLatin1( "Children" ),
        QStringList() );
    Q_FOREACH( const QString& framePrefix, childList )
    {
        BrowserFrame* const frame = new BrowserFrame(m_tabWidget);
        frame->loadConfig( config, framePrefix + QLatin1Char( '_' ) );

        connect( m_part, SIGNAL(signalSettingsChanged()), frame, SLOT(slotPaletteOrFontChanged()));
        connect( m_tabWidget, SIGNAL(signalZoomInFrame(int)), frame, SLOT(slotZoomIn(int)));
        connect( m_tabWidget, SIGNAL(signalZoomOutFrame(int)), frame, SLOT(slotZoomOut(int)));

        Kernel::self()->frameManager()->slotAddFrame(frame);

    }
}

void Akregator::MainWidget::saveProperties(KConfigGroup & config)
{
    // save filter settings
    config.writeEntry("searchLine", m_searchBar->text());
    config.writeEntry("searchCombo", m_searchBar->status());

    Kernel::self()->frameManager()->saveProperties(config);
}

void Akregator::MainWidget::ensureArticleTabVisible()
{
    m_tabWidget->setCurrentWidget( m_mainFrame );
}

void MainWidget::slotReloadAllTabs()
{
  this->m_tabWidget->slotReloadAllTabs();
}


bool MainWidget::isNetworkAvailable()
{
  return m_networkAvailable;
}

void MainWidget::slotNetworkStatusChanged(Solid::Networking::Status status)
{
  if(status==Solid::Networking::Connected || Solid::Networking::status() == Solid::Networking::Unknown)
  {
    m_networkAvailable=true;
    m_mainFrame->slotSetStatusText(i18n("Networking is available now."));
    this->slotFetchAllFeeds();
  }
  else if(Solid::Networking::Unconnected)
  {
    m_networkAvailable=false;
    m_mainFrame->slotSetStatusText(i18n("Networking is not available."));
  }
}

void Akregator::MainWidget::slotOpenSelectedArticles()
{
    openSelectedArticles( false );
}


void Akregator::MainWidget::slotOpenSelectedArticlesInBackground()
{
    openSelectedArticles( true );
}