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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/***************************************************************************
* Copyright (C) 2011 by Peter Penz <[email protected]> *
* Copyright (C) 2013 by Frank Reininghaus <[email protected]> *
* *
* 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 "kdirectorycontentscounter.h"
#include "kdirectorycontentscounterworker.h"
#include <kitemviews/kfileitemmodel.h>
#include <KDirWatch>
#include <QThread>
KDirectoryContentsCounter::KDirectoryContentsCounter(KFileItemModel* model, QObject* parent) :
QObject(parent),
m_model(model),
m_queue(),
m_worker(0),
m_workerIsBusy(false),
m_dirWatcher(0),
m_watchedDirs()
{
connect(m_model, &KFileItemModel::itemsRemoved,
this, &KDirectoryContentsCounter::slotItemsRemoved);
if (!m_workerThread) {
m_workerThread = new QThread();
m_workerThread->start();
}
m_worker = new KDirectoryContentsCounterWorker();
m_worker->moveToThread(m_workerThread);
++m_workersCount;
connect(this, &KDirectoryContentsCounter::requestDirectoryContentsCount,
m_worker, &KDirectoryContentsCounterWorker::countDirectoryContents);
connect(m_worker, &KDirectoryContentsCounterWorker::result,
this, &KDirectoryContentsCounter::slotResult);
m_dirWatcher = new KDirWatch(this);
connect(m_dirWatcher, &KDirWatch::dirty, this, &KDirectoryContentsCounter::slotDirWatchDirty);
}
KDirectoryContentsCounter::~KDirectoryContentsCounter()
{
--m_workersCount;
if (m_workersCount > 0) {
// The worker thread will continue running. It could even be running
// a method of m_worker at the moment, so we delete it using
// deleteLater() to prevent a crash.
m_worker->deleteLater();
} else {
// There are no remaining workers -> stop the worker thread.
m_workerThread->quit();
m_workerThread->wait();
delete m_workerThread;
m_workerThread = 0;
// The worker thread has finished running now, so it's safe to delete
// m_worker. deleteLater() would not work at all because the event loop
// which would deliver the event to m_worker is not running any more.
delete m_worker;
}
}
void KDirectoryContentsCounter::addDirectory(const QString& path)
{
startWorker(path);
}
int KDirectoryContentsCounter::countDirectoryContentsSynchronously(const QString& path)
{
if (!m_dirWatcher->contains(path)) {
m_dirWatcher->addDir(path);
m_watchedDirs.insert(path);
}
KDirectoryContentsCounterWorker::Options options;
if (m_model->showHiddenFiles()) {
options |= KDirectoryContentsCounterWorker::CountHiddenFiles;
}
if (m_model->showDirectoriesOnly()) {
options |= KDirectoryContentsCounterWorker::CountDirectoriesOnly;
}
return KDirectoryContentsCounterWorker::subItemsCount(path, options);
}
void KDirectoryContentsCounter::slotResult(const QString& path, int count)
{
m_workerIsBusy = false;
if (!m_dirWatcher->contains(path)) {
m_dirWatcher->addDir(path);
m_watchedDirs.insert(path);
}
if (!m_queue.isEmpty()) {
startWorker(m_queue.dequeue());
}
emit result(path, count);
}
void KDirectoryContentsCounter::slotDirWatchDirty(const QString& path)
{
const int index = m_model->index(QUrl::fromLocalFile(path));
if (index >= 0) {
if (!m_model->fileItem(index).isDir()) {
// If INotify is used, KDirWatch issues the dirty() signal
// also for changed files inside the directory, even if we
// don't enable this behavior explicitly (see bug 309740).
return;
}
startWorker(path);
}
}
void KDirectoryContentsCounter::slotItemsRemoved()
{
const bool allItemsRemoved = (m_model->count() == 0);
if (!m_watchedDirs.isEmpty()) {
// Don't let KDirWatch watch for removed items
if (allItemsRemoved) {
foreach (const QString& path, m_watchedDirs) {
m_dirWatcher->removeDir(path);
}
m_watchedDirs.clear();
m_queue.clear();
} else {
QMutableSetIterator<QString> it(m_watchedDirs);
while (it.hasNext()) {
const QString& path = it.next();
if (m_model->index(QUrl::fromLocalFile(path)) < 0) {
m_dirWatcher->removeDir(path);
it.remove();
}
}
}
}
}
void KDirectoryContentsCounter::startWorker(const QString& path)
{
if (m_workerIsBusy) {
m_queue.enqueue(path);
} else {
KDirectoryContentsCounterWorker::Options options;
if (m_model->showHiddenFiles()) {
options |= KDirectoryContentsCounterWorker::CountHiddenFiles;
}
if (m_model->showDirectoriesOnly()) {
options |= KDirectoryContentsCounterWorker::CountDirectoriesOnly;
}
emit requestDirectoryContentsCount(path, options);
m_workerIsBusy = true;
}
}
QThread* KDirectoryContentsCounter::m_workerThread = 0;
int KDirectoryContentsCounter::m_workersCount = 0;
|
