/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2013-02-11
 * Description : Table view
 *
 * Copyright (C) 2013 by Michael G. Hansen <mike at mghansen dot de>
 *
 * 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, 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.
 *
 * ============================================================ */

#include "tableview.h"

// Qt includes

#include <QContextMenuEvent>
#include <QHeaderView>
#include <QItemSelectionModel>
#include <QVBoxLayout>
#include <QMenu>
#include <QAction>
#include <QIcon>
#include <QApplication>

// Local includes

#include "contextmenuhelper.h"
#include "fileactionmngr.h"
#include "album.h"
#include "applicationsettings.h"
#include "imageviewutilities.h"
#include "tableview_columnfactory.h"
#include "tableview_model.h"
#include "tableview_selection_model_syncer.h"
#include "tableview_shared.h"
#include "tableview_treeview.h"

namespace Digikam
{

class ImageAlbumModel;
class ImageFilterModel;

class TableView::Private
{
public:

    Private()
      : columnProfiles(),
        thumbnailSize(),
        imageViewUtilities(0)
    {
    }

    QList<TableViewColumnProfile> columnProfiles;
    ThumbnailSize                 thumbnailSize;
    ImageViewUtilities*           imageViewUtilities;
};

TableView::TableView(QItemSelectionModel* const selectionModel,
                     DCategorizedSortFilterProxyModel* const imageFilterModel,
                     QWidget* const parent)
    : QWidget(parent),
      StateSavingObject(this),
      d(new Private()),
      s(new TableViewShared())
{
    s->isActive                      = false;
    s->tableView                     = this;
    s->thumbnailLoadThread           = new ThumbnailLoadThread(this);
    s->imageFilterModel              = dynamic_cast<ImageFilterModel*>(imageFilterModel);
    s->imageModel                    = dynamic_cast<ImageModel*>(imageFilterModel->sourceModel());
    s->imageFilterSelectionModel     = selectionModel;
    s->columnFactory                 = new TableViewColumnFactory(s.data(), this);

    QVBoxLayout* const vbox1         = new QVBoxLayout();
    s->tableViewModel                = new TableViewModel(s.data(), this);
    s->tableViewSelectionModel       = new QItemSelectionModel(s->tableViewModel);
    s->tableViewSelectionModelSyncer = new TableViewSelectionModelSyncer(s.data(), this);
    s->treeView                      = new TableViewTreeView(s.data(), this);
    s->treeView->installEventFilter(this);

    d->imageViewUtilities            = new ImageViewUtilities(this);

    connect(s->treeView, SIGNAL(activated(QModelIndex)),
            this, SLOT(slotItemActivated(QModelIndex)));

    connect(s->treeView, SIGNAL(signalZoomInStep()),
            this, SIGNAL(signalZoomInStep()));

    connect(s->treeView, SIGNAL(signalZoomOutStep()),
            this, SIGNAL(signalZoomOutStep()));

    connect(s->tableViewSelectionModel, SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
            this, SIGNAL(signalItemsChanged()));

    connect(s->tableViewModel, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SIGNAL(signalItemsChanged()));

    connect(s->tableViewModel, SIGNAL(rowsRemoved(QModelIndex,int,int)),
            this, SIGNAL(signalItemsChanged()));

    connect(s->tableViewModel, SIGNAL(layoutChanged()),
            this, SIGNAL(signalItemsChanged()));

    connect(s->tableViewModel, SIGNAL(modelReset()),
            this, SIGNAL(signalItemsChanged()));

    vbox1->addWidget(s->treeView);

    setLayout(vbox1);
}

TableView::~TableView()
{
}

void TableView::doLoadState()
{
    const KConfigGroup group                        = getConfigGroup();

    TableViewColumnProfile profile;
    const KConfigGroup groupCurrentProfile          = group.group("Current Profile");
    profile.loadSettings(groupCurrentProfile);
    s->tableViewModel->loadColumnProfile(profile);

    const TableViewModel::GroupingMode groupingMode = TableViewModel::GroupingMode(group.readEntry<int>("Grouping mode",
                                                      int(TableViewModel::GroupingShowSubItems)));
    s->tableViewModel->setGroupingMode(groupingMode);

    if (!profile.headerState.isEmpty())
    {
        s->treeView->header()->restoreState(profile.headerState);
    }
}

void TableView::doSaveState()
{
    KConfigGroup group = getConfigGroup();

    TableViewColumnProfile profile   = s->tableViewModel->getColumnProfile();
    profile.headerState              = s->treeView->header()->saveState();
    KConfigGroup groupCurrentProfile = group.group("Current Profile");
    profile.saveSettings(groupCurrentProfile);
    group.writeEntry("Grouping mode", int(s->tableViewModel->groupingMode()));
}

void TableView::slotItemActivated(const QModelIndex& tableViewIndex)
{
    const ImageInfo info = s->tableViewModel->imageInfo(tableViewIndex);

    if (info.isNull())
    {
        return;
    }

    if (qApp->queryKeyboardModifiers() != Qt::MetaModifier)
    {
        if (ApplicationSettings::instance()->getItemLeftClickAction() == ApplicationSettings::ShowPreview)
        {
            emit signalPreviewRequested(info);
        }
        else
        {
            d->imageViewUtilities->openInfos(info, allInfo(), currentAlbum());
        }
    }
    else
    {
        d->imageViewUtilities->openInfosWithDefaultApplication(QList<ImageInfo>() << info);
    }
}

bool TableView::eventFilter(QObject* watched, QEvent* event)
{
    // we are looking for context menu events for the table view
    if ((watched == s->treeView) && (event->type() == QEvent::ContextMenu))
    {
        QContextMenuEvent* const e = static_cast<QContextMenuEvent*>(event);
        e->accept();

        const QModelIndex contextMenuIndex = s->treeView->indexAt(e->pos());

        if (contextMenuIndex.isValid())
        {
            showTreeViewContextMenuOnItem(e, contextMenuIndex);
        }
        else
        {
            showTreeViewContextMenuOnEmptyArea(e);
        }

        // event has been filtered by us
        return true;
    }

    return QObject::eventFilter(watched, event);
}

void TableView::showTreeViewContextMenuOnEmptyArea(QContextMenuEvent* const event)
{
    Album* const album = currentAlbum();

    if (!album          ||
        album->isRoot() ||
        (album->type() != Album::PHYSICAL && album->type() != Album::TAG) )
    {
        return;
    }

    QMenu menu(this);
    ContextMenuHelper cmHelper(&menu);

    cmHelper.addAction(QLatin1String("full_screen"));
    cmHelper.addAction(QLatin1String("options_show_menubar"));
    cmHelper.addSeparator();
    cmHelper.addStandardActionPaste(this, SLOT(slotPaste()));
    cmHelper.addSeparator();
    cmHelper.addGroupMenu(QList<qlonglong>(), getExtraGroupingActions(&cmHelper));

    cmHelper.exec(event->globalPos());
}

void TableView::showTreeViewContextMenuOnItem(QContextMenuEvent* const event, const QModelIndex& indexAtMenu)
{
    // get a list of currently selected images' ids
    const QList<qlonglong> selectedImageIds =  selectedImageIdsCurrentFirst();

    // Temporary actions --------------------------------------

    QAction* const viewAction = new QAction(i18nc("View the selected image", "Preview"), this);
    viewAction->setIcon(QIcon::fromTheme(QLatin1String("view-preview")));
    viewAction->setEnabled(selectedImageIds.count() == 1);

    // Creation of the menu -----------------------------------
    QMenu menu(this);
    ContextMenuHelper cmHelper(&menu);

    cmHelper.addAction(QLatin1String("full_screen"));
    cmHelper.addAction(QLatin1String("options_show_menubar"));
    cmHelper.addSeparator();
    // ---
    cmHelper.addAction(QLatin1String("move_selection_to_album"));
    cmHelper.addAction(viewAction);
    /// @todo image_edit is grayed out on first invocation of the menu for some reason
    cmHelper.addAction(QLatin1String("image_edit"));
    cmHelper.addServicesMenu(s->tableViewModel->selectedUrls());
    cmHelper.addGotoMenu(selectedImageIds);
    cmHelper.addAction(QLatin1String("image_rotate"));
    cmHelper.addSeparator();
    // ---
    cmHelper.addAction(QLatin1String("image_find_similar"));
    cmHelper.addStandardActionLightTable();
    cmHelper.addQueueManagerMenu();
    cmHelper.addSeparator();
    // ---
    cmHelper.addAction(QLatin1String("image_rename"));
    cmHelper.addAction(QLatin1String("cut_album_selection"));
    cmHelper.addAction(QLatin1String("copy_album_selection"));
    cmHelper.addAction(QLatin1String("paste_album_selection"));
    cmHelper.addStandardActionItemDelete(this, SLOT(slotDeleteSelected()), selectedImageIds.count());
    cmHelper.addSeparator();
    // ---
    cmHelper.addStandardActionThumbnail(selectedImageIds, currentAlbum());
    // ---
    cmHelper.addAssignTagsMenu(selectedImageIds);
    cmHelper.addRemoveTagsMenu(selectedImageIds);
    cmHelper.addSeparator();
    cmHelper.addLabelsAction();

    /// @todo In digikamimageview.cpp, this is not available in face mode
    cmHelper.addGroupMenu(selectedImageIds, getExtraGroupingActions(&cmHelper));

    connect(&cmHelper, SIGNAL(signalAssignColorLabel(int)),
            this, SLOT(slotAssignColorLabelToSelected(int)));

    connect(&cmHelper, SIGNAL(signalAssignPickLabel(int)),
            this, SLOT(slotAssignPickLabelToSelected(int)));

    connect(&cmHelper, SIGNAL(signalAssignRating(int)),
            this, SLOT(slotAssignRatingToSelected(int)));

    connect(&cmHelper, SIGNAL(signalAssignTag(int)),
            this, SLOT(slotAssignTagToSelected(int)));

    connect(&cmHelper, SIGNAL(signalRemoveTag(int)),
            this, SLOT(slotRemoveTagFromSelected(int)));

    connect(&cmHelper, SIGNAL(signalAddToExistingQueue(int)),
            this, SLOT(slotInsertSelectedToExistingQueue(int)));

    connect(&cmHelper, SIGNAL(signalPopupTagsView()),
            this, SIGNAL(signalPopupTagsView()));

    connect(&cmHelper, SIGNAL(signalGotoTag(int)),
            this, SIGNAL(signalGotoTagAndImageRequested(int)));

    connect(&cmHelper, SIGNAL(signalGotoAlbum(ImageInfo)),
            this, SIGNAL(signalGotoAlbumAndImageRequested(ImageInfo)));

    connect(&cmHelper, SIGNAL(signalGotoDate(ImageInfo)),
            this, SIGNAL(signalGotoDateAndImageRequested(ImageInfo)));

    connect(&cmHelper, SIGNAL(signalSetThumbnail(ImageInfo)),
            this, SLOT(slotSetAsAlbumThumbnail(ImageInfo)));

    connect(&cmHelper, SIGNAL(signalCreateGroup()),
            this, SLOT(slotCreateGroupFromSelection()));

    connect(&cmHelper, SIGNAL(signalRemoveFromGroup()),
            this, SLOT(slotRemoveSelectedFromGroup()));

    connect(&cmHelper, SIGNAL(signalUngroup()),
            this, SLOT(slotUngroupSelected()));

    connect(&cmHelper, SIGNAL(signalCreateGroupByTime()),
            this, SLOT(slotCreateGroupByTimeFromSelection()));

    connect(&cmHelper, SIGNAL(signalCreateGroupByType()),
            this, SLOT(slotCreateGroupByTypeFromSelection()));

    QAction* const choice = cmHelper.exec(event->globalPos());

    if (choice && (choice == viewAction) )
    {
        emit(signalPreviewRequested(s->tableViewModel->imageInfo(indexAtMenu)));
    }
}

QList<ImageInfo> TableView::selectedImageInfos() const
{
    const QModelIndexList selectedIndexes = s->tableViewSelectionModel->selectedRows();

    return s->tableViewModel->imageInfos(selectedIndexes);
}

QList<ImageInfo> TableView::selectedImageInfosCurrentFirst() const
{
    QModelIndexList selectedIndexes = s->tableViewSelectionModel->selectedRows();
    const QModelIndex cIndex        = s->tableViewSelectionModel->currentIndex();

    if (!selectedIndexes.isEmpty())
    {
        if (selectedIndexes.first()!=cIndex)
        {
            selectedIndexes.removeOne(cIndex);
            selectedIndexes.prepend(cIndex);
        }
    }

    return s->tableViewModel->imageInfos(selectedIndexes);
}

void TableView::slotAssignColorLabelToSelected(const int colorLabelID)
{
    FileActionMngr::instance()->assignColorLabel(selectedImageInfos(), colorLabelID);
}

void TableView::slotAssignPickLabelToSelected(const int pickLabelID)
{
    FileActionMngr::instance()->assignPickLabel(selectedImageInfos(), pickLabelID);
}

void TableView::slotAssignRatingToSelected(const int rating)
{
    FileActionMngr::instance()->assignRating(selectedImageInfos(), rating);
}

void TableView::slotAssignTagToSelected(const int tagID)
{
    FileActionMngr::instance()->assignTags(selectedImageInfos(), QList<int>() << tagID);
}

void TableView::slotRemoveTagFromSelected(const int tagID)
{
    FileActionMngr::instance()->removeTags(selectedImageInfos(), QList<int>() << tagID);
}

void TableView::setThumbnailSize(const ThumbnailSize& size)
{
    d->thumbnailSize                            = size;
    const QList<TableViewColumn*> columnObjects = s->tableViewModel->getColumnObjects();

    Q_FOREACH(TableViewColumn* const iColumn, columnObjects)
    {
        iColumn->updateThumbnailSize();
    }
}

ThumbnailSize TableView::getThumbnailSize() const
{
    return d->thumbnailSize;
}

QList<qlonglong> TableView::selectedImageIdsCurrentFirst() const
{
    const QModelIndexList selectedIndexes = s->tableViewSelectionModel->selectedRows();
    QList<qlonglong> selectedImageIds     =  s->tableViewModel->imageIds(selectedIndexes);
    const QModelIndex currentIndex        = s->tableViewSelectionModel->currentIndex();
    qlonglong currentId                   = s->tableViewModel->imageId(currentIndex);

    if (currentId>=0)
    {
        if (selectedImageIds.first()!=currentId)
        {
            selectedImageIds.removeOne(currentId);
            selectedImageIds.prepend(currentId);
        }
    }

    return selectedImageIds;
}

void TableView::slotInsertSelectedToExistingQueue(const int queueId)
{
    const ImageInfoList imageInfoList = selectedImageInfos();

    if (!imageInfoList.isEmpty())
    {
        d->imageViewUtilities->insertSilentToQueueManager(imageInfoList, imageInfoList.first(), queueId);
    }
}

void TableView::slotSetAsAlbumThumbnail(const ImageInfo& info)
{
    Album* const theCurrentAlbum = currentAlbum();

    if (!theCurrentAlbum)
    {
        return;
    }

    d->imageViewUtilities->setAsAlbumThumbnail(theCurrentAlbum, info);
}

Album* TableView::currentAlbum()
{
    ImageAlbumModel* const albumModel = qobject_cast<ImageAlbumModel*>(s->imageModel);

    if (!albumModel)
    {
        return 0;
    }

    if(albumModel->currentAlbums().isEmpty())
    {
        return 0;
    }

    return albumModel->currentAlbums().first();
}

void TableView::slotPaste()
{
    DragDropViewImplementation* const dragDropViewImplementation = s->treeView;
    dragDropViewImplementation->paste();
}

ImageInfo TableView::currentInfo()
{
    return s->tableViewModel->imageInfo(s->tableViewSelectionModel->currentIndex());
}

ImageInfoList TableView::allInfo() const
{
    return s->tableViewModel->allImageInfo();
}

void TableView::slotDeleteSelected(const ImageViewUtilities::DeleteMode deleteMode)
{
    const ImageInfoList infoList = selectedImageInfos();

    /// @todo Update parameter naming for deleteImages
    if (d->imageViewUtilities->deleteImages(infoList, deleteMode))
    {
        slotAwayFromSelection();
    }
}

void TableView::slotDeleteSelectedWithoutConfirmation(const ImageViewUtilities::DeleteMode deleteMode)
{
    const ImageInfoList infoList = selectedImageInfos();

    d->imageViewUtilities->deleteImagesDirectly(infoList, deleteMode);
    slotAwayFromSelection();
}

void TableView::slotRemoveSelectedFromGroup()
{
    FileActionMngr::instance()->removeFromGroup(selectedImageInfos());
}

void TableView::slotUngroupSelected()
{
    FileActionMngr::instance()->ungroup(selectedImageInfos());
}

void TableView::slotCreateGroupFromSelection()
{
    const QList<ImageInfo> selectedInfos = selectedImageInfos();
    const ImageInfo groupLeader          = currentInfo();
    FileActionMngr::instance()->addToGroup(groupLeader, selectedInfos);
}

void TableView::slotCreateGroupByTimeFromSelection()
{
    const QList<ImageInfo> selectedInfos = selectedImageInfos();
    d->imageViewUtilities->createGroupByTimeFromInfoList(selectedInfos);
}

void TableView::slotCreateGroupByTypeFromSelection()
{
    const QList<ImageInfo> selectedInfos = selectedImageInfos();
    d->imageViewUtilities->createGroupByTypeFromInfoList(selectedInfos);
}

QList<QAction*> TableView::getExtraGroupingActions(QObject* const parentObject) const
{
    QList<QAction*> actionList;

    const TableViewModel::GroupingMode currentGroupingMode = s->tableViewModel->groupingMode();

    QAction* const actionHideGrouped = new QAction(i18n("Hide grouped items"), parentObject);
    actionHideGrouped->setCheckable(true);
    actionHideGrouped->setChecked(currentGroupingMode == TableViewModel::GroupingHideGrouped);
    actionHideGrouped->setData(QVariant::fromValue<TableViewModel::GroupingMode>(TableViewModel::GroupingHideGrouped));

    connect(actionHideGrouped, SIGNAL(triggered(bool)),
            this, SLOT(slotGroupingModeActionTriggered()));

    actionList << actionHideGrouped;

    QAction* const actionIgnoreGrouping = new QAction(i18n("Ignore grouping"), parentObject);
    actionIgnoreGrouping->setCheckable(true);
    actionIgnoreGrouping->setChecked(currentGroupingMode == TableViewModel::GroupingIgnoreGrouping);
    actionIgnoreGrouping->setData(QVariant::fromValue<TableViewModel::GroupingMode>(TableViewModel::GroupingIgnoreGrouping));

    connect(actionIgnoreGrouping, SIGNAL(triggered(bool)),
            this, SLOT(slotGroupingModeActionTriggered()));

    actionList << actionIgnoreGrouping;

    QAction* const actionShowSubItems = new QAction(i18n("Show grouping in tree"), parentObject);
    actionShowSubItems->setCheckable(true);
    actionShowSubItems->setChecked(currentGroupingMode == TableViewModel::GroupingShowSubItems);
    actionShowSubItems->setData(QVariant::fromValue<TableViewModel::GroupingMode>(TableViewModel::GroupingShowSubItems));

    connect(actionShowSubItems, SIGNAL(triggered(bool)),
            this, SLOT(slotGroupingModeActionTriggered()));

    actionList << actionShowSubItems;

    return actionList;
}

void TableView::slotGroupingModeActionTriggered()
{
    const QAction* const senderAction = qobject_cast<QAction*>(sender());

    if (!senderAction)
    {
        return;
    }

    const TableViewModel::GroupingMode newGroupingMode = senderAction->data().value<TableViewModel::GroupingMode>();
    s->tableViewModel->setGroupingMode(newGroupingMode);
}

QList<QUrl> TableView::allUrls() const
{
    const ImageInfoList allInfo = s->tableViewModel->allImageInfo();
    QList<QUrl> resultList;

    Q_FOREACH(const ImageInfo& info, allInfo)
    {
        resultList << info.fileUrl();
    }

    return resultList;
}

QList<QUrl> TableView::selectedUrls() const
{
    return s->tableViewModel->selectedUrls();
}

int TableView::numberOfSelectedItems() const
{
    return s->tableViewSelectionModel->selectedRows().count();
}

void TableView::slotGoToRow(const int rowNumber, const bool relativeMove)
{
    int nextDeepRowNumber = rowNumber;

    if (relativeMove)
    {
        const QModelIndex currentTableViewIndex = s->tableViewSelectionModel->currentIndex();
        const int currentDeepRowNumber          = s->tableViewModel->indexToDeepRowNumber(currentTableViewIndex);
        nextDeepRowNumber                      += currentDeepRowNumber;
    }

    const QModelIndex nextIndex = s->tableViewModel->deepRowIndex(nextDeepRowNumber);

    if (nextIndex.isValid())
    {
        const QItemSelection rowSelection = s->tableViewSelectionModelSyncer->targetIndexToRowItemSelection(nextIndex);
        s->tableViewSelectionModel->select(rowSelection, QItemSelectionModel::ClearAndSelect);
        s->tableViewSelectionModel->setCurrentIndex(nextIndex, QItemSelectionModel::Select);
    }
}

ImageInfo TableView::deepRowImageInfo(const int rowNumber, const bool relative) const
{
    int targetRowNumber = rowNumber;

    if (relative)
    {
        const QModelIndex& currentTableViewIndex = s->tableViewSelectionModel->currentIndex();

        if (!currentTableViewIndex.isValid())
        {
            return ImageInfo();
        }

        const int currentDeepRowNumber = s->tableViewModel->indexToDeepRowNumber(currentTableViewIndex);
        targetRowNumber               += currentDeepRowNumber;
    }

    const QModelIndex targetIndex = s->tableViewModel->deepRowIndex(targetRowNumber);
    return s->tableViewModel->imageInfo(targetIndex);
}

ImageInfo TableView::nextInfo() const
{
    const QModelIndex cIndex       = s->tableViewSelectionModel->currentIndex();
    const int currentDeepRowNumber = s->tableViewModel->indexToDeepRowNumber(cIndex);
    const int nextDeepRowNumber    = currentDeepRowNumber + 1;

    if (nextDeepRowNumber>=s->tableViewModel->deepRowCount())
    {
        return ImageInfo();
    }

    const QModelIndex nextDeepRowIndex = s->tableViewModel->deepRowIndex(nextDeepRowNumber);
    return s->tableViewModel->imageInfo(nextDeepRowIndex);
}

ImageInfo TableView::previousInfo() const
{
    const QModelIndex cIndex        = s->tableViewSelectionModel->currentIndex();
    const int currentDeepRowNumber  = s->tableViewModel->indexToDeepRowNumber(cIndex);
    const int previousDeepRowNumber = currentDeepRowNumber - 1;

    if (previousDeepRowNumber<0)
    {
        return ImageInfo();
    }

    const QModelIndex previousDeepRowIndex = s->tableViewModel->deepRowIndex(previousDeepRowNumber);
    return s->tableViewModel->imageInfo(previousDeepRowIndex);
}

void TableView::slotSetCurrentWhenAvailable(const qlonglong id)
{
    const QModelIndex idx = s->tableViewModel->indexFromImageId(id, 0);

    if (!idx.isValid())
    {
        /// @todo Actually buffer this request until the model is fully populated
        return;
    }

    s->tableViewSelectionModel->setCurrentIndex(idx, QItemSelectionModel::ClearAndSelect);
}

/**
 * @brief Unselects the current selection and changes the current item
 *
 * @todo This may not work correctly if grouped items are deleted, but are not selected
 */
void TableView::slotAwayFromSelection()
{
    QModelIndexList selection = s->tableViewSelectionModel->selectedRows(0);

    if (selection.isEmpty())
    {
        return;
    }

    const QModelIndex firstIndex = s->tableViewModel->deepRowIndex(0);
    const QModelIndex lastIndex  = s->tableViewModel->deepRowIndex(-1);

    if (selection.contains(firstIndex) && selection.contains(lastIndex))
    {
        // both the first and the last index are selected, we have to
        // select an index inbetween
        const int nextFreeDeepRow = s->tableViewModel->firstDeepRowNotInList(selection);

        if (nextFreeDeepRow<0)
        {
            s->tableViewSelectionModel->clearSelection();
            s->tableViewSelectionModel->setCurrentIndex(QModelIndex(), QItemSelectionModel::ClearAndSelect);
        }
        else
        {
            const QModelIndex nextFreeIndex         = s->tableViewModel->deepRowIndex(nextFreeDeepRow);
            s->tableViewSelectionModel->setCurrentIndex(nextFreeIndex, QItemSelectionModel::ClearAndSelect);
            const QItemSelection nextFreeIndexAsRow = s->tableViewSelectionModelSyncer->targetIndexToRowItemSelection(nextFreeIndex);
            s->tableViewSelectionModel->select(nextFreeIndexAsRow, QItemSelectionModel::ClearAndSelect);
        }
    }
    else if (selection.contains(lastIndex))
    {
        const int firstSelectedRowNumber   = s->tableViewModel->indexToDeepRowNumber(selection.first());
        const QModelIndex newIndex         = s->tableViewModel->deepRowIndex(firstSelectedRowNumber-1);
        s->tableViewSelectionModel->setCurrentIndex(newIndex, QItemSelectionModel::ClearAndSelect);
        const QItemSelection newIndexAsRow = s->tableViewSelectionModelSyncer->targetIndexToRowItemSelection(newIndex);
        s->tableViewSelectionModel->select(newIndexAsRow, QItemSelectionModel::ClearAndSelect);
    }
    else
    {
        const int lastSelectedRowNumber    = s->tableViewModel->indexToDeepRowNumber(selection.last());
        const QModelIndex newIndex         = s->tableViewModel->deepRowIndex(lastSelectedRowNumber+1);
        s->tableViewSelectionModel->setCurrentIndex(newIndex, QItemSelectionModel::ClearAndSelect);
        const QItemSelection newIndexAsRow = s->tableViewSelectionModelSyncer->targetIndexToRowItemSelection(newIndex);
        s->tableViewSelectionModel->select(newIndexAsRow, QItemSelectionModel::ClearAndSelect);
    }
}

void TableView::clearSelection()
{
    s->tableViewSelectionModel->clearSelection();
}

void TableView::invertSelection()
{
    const int deepRowCount = s->tableViewModel->deepRowCount();
    QList<int> rowsToSelect;
    int lastSelectedRow    = -1;

    /// @todo Create a DeepRowIterator because there is a lot of overhead here

    for (int i = 0; i < deepRowCount; ++i)
    {
        const QModelIndex iIndex = s->tableViewModel->deepRowIndex(i);

        if (s->tableViewSelectionModel->isSelected(iIndex))
        {
            if (i-1 > lastSelectedRow)
            {
                for (int j = lastSelectedRow+1; j < i; ++j)
                {
                    rowsToSelect << j;
                }
            }

            lastSelectedRow = i;
        }
    }

    if (lastSelectedRow+1<deepRowCount)
    {
        for (int j = lastSelectedRow+1; j < deepRowCount; ++j)
        {
            rowsToSelect << j;
        }
    }

    s->tableViewSelectionModel->clearSelection();

    Q_FOREACH(const int i, rowsToSelect)
    {
        const QModelIndex iIndex = s->tableViewModel->deepRowIndex(i);
        const QItemSelection is  = s->tableViewSelectionModelSyncer->targetIndexToRowItemSelection(iIndex);
        s->tableViewSelectionModel->select(is, QItemSelectionModel::Select);
    }
}

void TableView::selectAll()
{
    /// @todo This only selects expanded items.
    s->treeView->selectAll();
}

void TableView::slotSetActive(const bool isActive)
{
    if (s->isActive!=isActive)
    {
        s->isActive = isActive;
        s->tableViewModel->slotSetActive(isActive);
        s->tableViewSelectionModelSyncer->slotSetActive(isActive);
    }
}

} // namespace Digikam
