summaryrefslogtreecommitdiffstats
path: root/cervisia/updateview_visitors.cpp
blob: 0da6940b8fee72ae92014217c53ff8dfcfb6c08e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
/*
 * 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 TQListViewItem::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 tqchildren
    // - it is not opened
    // - empty directories are not hidden
    // - it has no tqparent (top level item)
    const bool visible(!m_invisibleDirItems.count(item)
                       || !item->wasScanned()
                       || !(m_filter & UpdateView::NoEmptyDirectories)
                       || !item->tqparent());

    // only set invisible as TQListViewItem::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->tqparent())))
    {
        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;
        }
    }
}