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/*
* Copyright (c) 2003-2007 André Wöbbeking <Woebbeking@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.
*/
#include "updateview_visitors.h"
#include "updateview.h"
#include "updateview_items.h"
using Cervisia::Entry;
ApplyFilterVisitor::ApplyFilterVisitor(UpdateView::Filter filter)
: m_filter(filter)
{
}
void ApplyFilterVisitor::preVisit(UpdateDirItem* item)
{
// as QListViewItem::setVisible() is recursive we have to make
// this UpdateDirItem visible first and later we can make it invisible
item->setVisible(true);
// assume that this item is invisible and correct it later
// (see markAllParentsAsVisible())
m_invisibleDirItems.insert(item);
}
void ApplyFilterVisitor::postVisit(UpdateDirItem* item)
{
// a UpdateDirItem is visible if
// - it has visible children
// - it is not opened
// - empty directories are not hidden
// - it has no parent (top level item)
const bool visible(!m_invisibleDirItems.count(item)
|| !item->wasScanned()
|| !(m_filter & UpdateView::NoEmptyDirectories)
|| !item->parent());
// only set invisible as QListViewItem::setVisible() is recursive
// and so maybe overrides the state applied by the filter
if (visible)
{
markAllParentsAsVisible(item);
}
else
{
item->setVisible(false);
}
}
void ApplyFilterVisitor::visit(UpdateFileItem* item)
{
const bool visible(item->applyFilter(m_filter));
if (visible)
{
markAllParentsAsVisible(item);
}
}
void ApplyFilterVisitor::markAllParentsAsVisible(UpdateItem* item)
{
while ((item = static_cast<UpdateDirItem*>(item->parent())))
{
TItemSet::iterator it = m_invisibleDirItems.find(item);
if (it != m_invisibleDirItems.end())
{
m_invisibleDirItems.erase(it);
}
else
{
// if this item isn't in the map anymore all parents
// are already removed too
break;
}
}
}
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