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Clementine-audio-player-Mac.../src/library/librarywatcher.cpp

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/* This file is part of Clementine.
Copyright 2010, David Sansome <me@davidsansome.com>
Clementine 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 3 of the License, or
(at your option) any later version.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "librarywatcher.h"
#include <fileref.h>
#include <tag.h>
#include <QDateTime>
#include <QDirIterator>
#include <QHash>
#include <QMutexLocker>
#include <QSet>
#include <QSettings>
#include <QThread>
#include <QTimer>
#include <QtDebug>
#include "core/filesystemwatcherinterface.h"
#include "core/logging.h"
#include "core/tagreaderclient.h"
#include "core/taskmanager.h"
#include "core/utilities.h"
#include "librarybackend.h"
#include "playlistparsers/cueparser.h"
// This is defined by one of the windows headers that is included by taglib.
#ifdef RemoveDirectory
#undef RemoveDirectory
#endif
namespace {
static const char* kNoMediaFile = ".nomedia";
static const char* kNoMusicFile = ".nomusic";
} // namespace
static const int kUnfilteredImageLimit = 10;
QStringList LibraryWatcher::sValidImages;
const char* LibraryWatcher::kSettingsGroup = "LibraryWatcher";
LibraryWatcher::LibraryWatcher(QObject* parent)
: QObject(parent),
backend_(nullptr),
task_manager_(nullptr),
fs_watcher_(FileSystemWatcherInterface::Create(this)),
scan_on_startup_(true),
monitor_(true),
rescan_timer_(new QTimer(this)),
rescan_paused_(false),
total_watches_(0),
cue_parser_(new CueParser(backend_, this)) {
rescan_timer_->setInterval(1000);
rescan_timer_->setSingleShot(true);
if (sValidImages.isEmpty()) {
sValidImages << "jpg"
<< "png"
<< "gif"
<< "jpeg";
}
ReloadSettings();
connect(rescan_timer_, SIGNAL(timeout()), SLOT(RescanPathsNow()));
}
// Holding a reference to a directory is safe because a ScanTransaction object
// is only created on a stack and the removal of a directory from the watch
// list only occurs as a result of a signal and happens on the watcher's
// thread. So the Directory object will not be deleted out from under us.
LibraryWatcher::ScanTransaction::ScanTransaction(
LibraryWatcher* watcher, const LibraryWatcher::WatchedDir& dir,
bool incremental, bool ignores_mtime)
: progress_(0),
progress_max_(0),
dir_(dir),
incremental_(incremental),
ignores_mtime_(ignores_mtime),
watcher_(watcher),
cached_songs_dirty_(true),
known_subdirs_dirty_(true) {
QString description;
if (watcher_->device_name_.isEmpty())
description = tr("Updating library");
else
description = tr("Updating %1").arg(watcher_->device_name_);
task_id_ = watcher_->task_manager_->StartTask(description);
emit watcher_->ScanStarted(task_id_);
}
LibraryWatcher::ScanTransaction::~ScanTransaction() {
// If we're stopping then don't commit the transaction
if (aborted()) {
watcher_->task_manager_->SetTaskFinished(task_id_);
return;
}
if (!new_songs.isEmpty()) emit watcher_->NewOrUpdatedSongs(new_songs);
if (!touched_songs.isEmpty()) emit watcher_->SongsMTimeUpdated(touched_songs);
if (!deleted_songs.isEmpty()) emit watcher_->SongsDeleted(deleted_songs);
if (!readded_songs.isEmpty()) emit watcher_->SongsReadded(readded_songs);
if (!new_subdirs.isEmpty()) emit watcher_->SubdirsDiscovered(new_subdirs);
if (!touched_subdirs.isEmpty())
emit watcher_->SubdirsMTimeUpdated(touched_subdirs);
watcher_->task_manager_->SetTaskFinished(task_id_);
for (const Subdirectory& subdir : deleted_subdirs) {
watcher_->RemoveWatch(dir_, subdir);
}
if (watcher_->monitor_) {
// Watch the new subdirectories
for (const Subdirectory& subdir : new_subdirs) {
watcher_->AddWatch(dir_, subdir.path);
}
}
}
void LibraryWatcher::ScanTransaction::AddToProgress(int n) {
progress_ += n;
watcher_->task_manager_->SetTaskProgress(task_id_, progress_, progress_max_);
}
void LibraryWatcher::ScanTransaction::AddToProgressMax(int n) {
progress_max_ += n;
watcher_->task_manager_->SetTaskProgress(task_id_, progress_, progress_max_);
}
SongList LibraryWatcher::ScanTransaction::FindSongsInSubdirectory(
const QString& path) {
if (cached_songs_dirty_) {
cached_songs_ = watcher_->backend_->FindSongsInDirectory(dir_id());
cached_songs_dirty_ = false;
}
// TODO: Make this faster
SongList ret;
for (const Song& song : cached_songs_) {
if (song.url().toLocalFile().section('/', 0, -2) == path) ret << song;
}
return ret;
}
void LibraryWatcher::ScanTransaction::SetKnownSubdirs(
const SubdirectoryList& subdirs) {
known_subdirs_ = subdirs;
known_subdirs_dirty_ = false;
}
bool LibraryWatcher::ScanTransaction::HasSeenSubdir(const QString& path) {
if (known_subdirs_dirty_)
SetKnownSubdirs(watcher_->backend_->SubdirsInDirectory(dir_id()));
for (const Subdirectory& subdir : known_subdirs_) {
if (subdir.path == path && subdir.mtime != 0) return true;
}
return false;
}
SubdirectoryList LibraryWatcher::ScanTransaction::GetImmediateSubdirs(
const QString& path) {
if (known_subdirs_dirty_)
SetKnownSubdirs(watcher_->backend_->SubdirsInDirectory(dir_id()));
SubdirectoryList ret;
for (const Subdirectory& subdir : known_subdirs_) {
if (subdir.path.left(subdir.path.lastIndexOf(QDir::separator())) == path &&
subdir.mtime != 0) {
ret << subdir;
}
}
return ret;
}
SubdirectoryList LibraryWatcher::ScanTransaction::GetAllSubdirs() {
if (known_subdirs_dirty_)
SetKnownSubdirs(watcher_->backend_->SubdirsInDirectory(dir_id()));
return known_subdirs_;
}
void LibraryWatcher::WatchList::StopAll() {
QMutexLocker l(&mutex_);
for (WatchedDir& wdir : list_) {
wdir.active_ = false;
}
}
void LibraryWatcher::WatchList::Stop(int dir_id) {
QMutexLocker l(&mutex_);
if (list_.contains(dir_id)) {
list_[dir_id].active_ = false;
}
}
void LibraryWatcher::WatchList::Remove(int id) {
QMutexLocker l(&mutex_);
list_.remove(id);
}
void LibraryWatcher::WatchList::Add(const Directory& dir) {
// Lock is not really necessary here, but it's also not going to block
// anything, so include it for sanity and completeness.
QMutexLocker l(&mutex_);
list_[dir.id] = WatchedDir(dir);
}
void LibraryWatcher::AddDirectory(const Directory& dir,
const SubdirectoryList& subdirs) {
qLog(Debug) << "Add directory" << dir.GetPath();
watched_dirs_.Add(dir);
const WatchedDir& new_dir = watched_dirs_.list_[dir.id];
if (subdirs.isEmpty()) {
// This is a new directory that we've never seen before.
// Scan it fully.
ScanTransaction transaction(this, new_dir, false);
transaction.SetKnownSubdirs(subdirs);
transaction.AddToProgressMax(1);
ScanSubdirectory(new_dir.path, Subdirectory(), &transaction);
} else {
// We can do an incremental scan - looking at the mtimes of each
// subdirectory and only rescan if the directory has changed.
ScanTransaction transaction(this, new_dir, true);
transaction.SetKnownSubdirs(subdirs);
transaction.AddToProgressMax(subdirs.count());
for (const Subdirectory& subdir : subdirs) {
if (transaction.aborted()) return;
if (scan_on_startup_) ScanSubdirectory(subdir.path, subdir, &transaction);
if (monitor_) AddWatch(new_dir, subdir.path);
}
}
emit CompilationsNeedUpdating();
}
void LibraryWatcher::ScanSubdirectory(const QString& path,
const Subdirectory& subdir,
ScanTransaction* t,
bool force_noincremental) {
QFileInfo path_info(path);
QDir path_dir(path);
// Do not scan symlinked dirs that are already in collection
if (path_info.isSymLink()) {
QString real_path = path_info.symLinkTarget();
for (const Directory& dir : watched_dirs_.list_) {
if (real_path.startsWith(dir.path)) {
t->AddToProgress(1);
return;
}
}
}
// Do not scan directories containing a .nomedia or .nomusic file
if (path_dir.exists(kNoMediaFile) || path_dir.exists(kNoMusicFile)) {
t->AddToProgress(1);
return;
}
if (!t->ignores_mtime() && !force_noincremental && t->is_incremental() &&
subdir.mtime == path_info.lastModified().toTime_t()) {
// The directory hasn't changed since last time
t->AddToProgress(1);
return;
}
QMap<QString, QStringList> album_art;
QStringList files_on_disk;
SubdirectoryList my_new_subdirs;
// If a directory is moved then only its parent gets a changed notification,
// so we need to look and see if any of our children don't exist any more.
// If one has been removed, "rescan" it to get the deleted songs
SubdirectoryList previous_subdirs = t->GetImmediateSubdirs(path);
for (const Subdirectory& subdir : previous_subdirs) {
if (!QFile::exists(subdir.path) && subdir.path != path) {
t->AddToProgressMax(1);
ScanSubdirectory(subdir.path, subdir, t, true);
}
}
// First we "quickly" get a list of the files in the directory that we
// think might be music. While we're here, we also look for new
// subdirectories
// and possible album artwork.
QDirIterator it(
path, QDir::Dirs | QDir::Files | QDir::Hidden | QDir::NoDotAndDotDot);
while (it.hasNext()) {
if (t->aborted()) return;
QString child(it.next());
QFileInfo child_info(child);
if (child_info.isDir()) {
if (!child_info.isHidden() && !t->HasSeenSubdir(child)) {
// We haven't seen this subdirectory before - add it to a list and
// later we'll tell the backend about it and scan it.
Subdirectory new_subdir;
new_subdir.directory_id = -1;
new_subdir.path = child;
new_subdir.mtime = child_info.lastModified().toTime_t();
my_new_subdirs << new_subdir;
}
} else {
QString ext_part(ExtensionPart(child));
QString dir_part(DirectoryPart(child));
if (!skip_file_extensions_.contains(ext_part)) {
if (sValidImages.contains(ext_part))
album_art[dir_part] << child;
else if (!child_info.isHidden())
files_on_disk << child;
}
}
}
if (t->aborted()) return;
// Ask the database for a list of files in this directory
SongList songs_in_db = t->FindSongsInSubdirectory(path);
QSet<QString> cues_processed;
// Now compare the list from the database with the list of files on disk
for (const QString& file : files_on_disk) {
if (t->aborted()) return;
// associated cue
QString matching_cue = NoExtensionPart(file) + ".cue";
Song matching_song;
if (FindSongByPath(songs_in_db, file, &matching_song)) {
uint matching_cue_mtime = GetMtimeForCue(matching_cue);
// The song is in the database and still on disk.
// Check the mtime to see if it's been changed since it was added.
QFileInfo file_info(file);
if (!file_info.exists()) {
// Partially fixes race condition - if file was removed between being
// added to the list and now.
files_on_disk.removeAll(file);
continue;
}
// cue sheet's path from library (if any)
QString song_cue = matching_song.cue_path();
uint song_cue_mtime = GetMtimeForCue(song_cue);
bool cue_deleted = song_cue_mtime == 0 && matching_song.has_cue();
bool cue_added = matching_cue_mtime != 0 && !matching_song.has_cue();
// watch out for cue songs which have their mtime equal to
// qMax(media_file_mtime, cue_sheet_mtime)
bool changed =
(matching_song.mtime() !=
qMax(file_info.lastModified().toTime_t(), song_cue_mtime)) ||
cue_deleted || cue_added;
// Also want to look to see whether the album art has changed
QString image = ImageForSong(file, &album_art, t);
if ((matching_song.art_automatic().isEmpty() && !image.isEmpty()) ||
(!matching_song.art_automatic().isEmpty() &&
!matching_song.has_embedded_cover() &&
!QFile::exists(matching_song.art_automatic()))) {
changed = true;
}
// the song's changed - reread the metadata from file
if (t->ignores_mtime() || changed) {
qLog(Debug) << file << "changed";
// if cue associated...
if (!cue_deleted && (matching_song.has_cue() || cue_added)) {
UpdateCueAssociatedSongs(file, path, matching_cue, image, t);
// if no cue or it's about to lose it...
} else {
UpdateNonCueAssociatedSong(file, matching_song, image, cue_deleted,
t);
}
}
// nothing has changed - mark the song available without re-scanning
if (matching_song.is_unavailable()) t->readded_songs << matching_song;
} else {
// The song is on disk but not in the DB
SongList song_list =
ScanNewFile(file, path, matching_cue, &cues_processed);
if (song_list.isEmpty()) {
continue;
}
qLog(Debug) << file << "created";
// choose an image for the song(s)
QString image = ImageForSong(file, &album_art, t);
for (Song song : song_list) {
song.set_directory_id(t->dir_id());
if (song.art_automatic().isEmpty()) song.set_art_automatic(image);
t->new_songs << song;
}
}
}
// Look for deleted songs
for (const Song& song : songs_in_db) {
if (!song.is_unavailable() &&
!files_on_disk.contains(song.url().toLocalFile())) {
qLog(Debug) << "Song deleted from disk:" << song.url().toLocalFile();
t->deleted_songs << song;
}
}
// Add this subdir to the new or touched list
Subdirectory updated_subdir;
updated_subdir.directory_id = t->dir_id();
updated_subdir.mtime =
path_info.exists() ? path_info.lastModified().toTime_t() : 0;
updated_subdir.path = path;
if (subdir.directory_id == -1)
t->new_subdirs << updated_subdir;
else
t->touched_subdirs << updated_subdir;
if (updated_subdir.mtime ==
0) { // Subdirectory deleted, mark it for removal from the watcher.
t->deleted_subdirs << updated_subdir;
}
t->AddToProgress(1);
// Recurse into the new subdirs that we found
t->AddToProgressMax(my_new_subdirs.count());
for (const Subdirectory& my_new_subdir : my_new_subdirs) {
if (t->aborted()) return;
ScanSubdirectory(my_new_subdir.path, my_new_subdir, t, true);
}
}
void LibraryWatcher::UpdateCueAssociatedSongs(const QString& file,
const QString& path,
const QString& matching_cue,
const QString& image,
ScanTransaction* t) {
QFile cue(matching_cue);
cue.open(QIODevice::ReadOnly);
SongList old_sections = backend_->GetSongsByUrl(QUrl::fromLocalFile(file));
QHash<quint64, Song> sections_map;
for (const Song& song : old_sections) {
sections_map[song.beginning_nanosec()] = song;
}
QSet<int> used_ids;
// update every song that's in the cue and library
for (Song cue_song : cue_parser_->Load(&cue, matching_cue, path)) {
cue_song.set_directory_id(t->dir_id());
Song matching = sections_map[cue_song.beginning_nanosec()];
// a new section
if (!matching.is_valid()) {
t->new_songs << cue_song;
// changed section
} else {
PreserveUserSetData(file, image, matching, &cue_song, t);
used_ids.insert(matching.id());
}
}
// sections that are now missing
for (const Song& matching : old_sections) {
if (!used_ids.contains(matching.id())) {
t->deleted_songs << matching;
}
}
}
void LibraryWatcher::UpdateNonCueAssociatedSong(const QString& file,
const Song& matching_song,
const QString& image,
bool cue_deleted,
ScanTransaction* t) {
// if a cue got deleted, we turn it's first section into the new
// 'raw' (cueless) song and we just remove the rest of the sections
// from the library
if (cue_deleted) {
for (const Song& song :
backend_->GetSongsByUrl(QUrl::fromLocalFile(file))) {
if (!song.IsMetadataEqual(matching_song)) {
t->deleted_songs << song;
}
}
}
Song song_on_disk;
song_on_disk.set_directory_id(t->dir_id());
TagReaderClient::Instance()->ReadFileBlocking(file, &song_on_disk);
if (song_on_disk.is_valid()) {
PreserveUserSetData(file, image, matching_song, &song_on_disk, t);
}
}
SongList LibraryWatcher::ScanNewFile(const QString& file, const QString& path,
const QString& matching_cue,
QSet<QString>* cues_processed) {
SongList song_list;
uint matching_cue_mtime = GetMtimeForCue(matching_cue);
// if it's a cue - create virtual tracks
if (matching_cue_mtime) {
// don't process the same cue many times
if (cues_processed->contains(matching_cue)) return song_list;
QFile cue(matching_cue);
cue.open(QIODevice::ReadOnly);
// Ignore FILEs pointing to other media files. Also, watch out for incorrect
// media files. Playlist parser for CUEs considers every entry in sheet
// valid and we don't want invalid media getting into library!
QString file_nfd = file.normalized(QString::NormalizationForm_D);
for (const Song& cue_song : cue_parser_->Load(&cue, matching_cue, path)) {
if (cue_song.url().toLocalFile().normalized(
QString::NormalizationForm_D) == file_nfd) {
if (TagReaderClient::Instance()->IsMediaFileBlocking(file)) {
song_list << cue_song;
}
}
}
if (!song_list.isEmpty()) {
*cues_processed << matching_cue;
}
// it's a normal media file
} else {
Song song;
TagReaderClient::Instance()->ReadFileBlocking(file, &song);
if (song.is_valid()) {
song_list << song;
}
}
return song_list;
}
void LibraryWatcher::PreserveUserSetData(const QString& file,
const QString& image,
const Song& matching_song, Song* out,
ScanTransaction* t) {
out->set_id(matching_song.id());
// Previous versions of Clementine incorrectly overwrote this and
// stored it in the DB, so we can't rely on matching_song to
// know if it has embedded artwork or not, but we can check here.
if (!out->has_embedded_cover()) out->set_art_automatic(image);
out->MergeUserSetData(matching_song);
// The song was deleted from the database (e.g. due to an unmounted
// filesystem), but has been restored.
if (matching_song.is_unavailable()) {
qLog(Debug) << file << " unavailable song restored";
t->new_songs << *out;
} else if (!matching_song.IsMetadataEqual(*out)) {
qLog(Debug) << file << "metadata changed";
// Update the song in the DB
t->new_songs << *out;
} else {
// Only the mtime's changed
t->touched_songs << *out;
}
}
uint LibraryWatcher::GetMtimeForCue(const QString& cue_path) {
// slight optimisation
if (cue_path.isEmpty()) {
return 0;
}
const QFileInfo file_info(cue_path);
if (!file_info.exists()) {
return 0;
}
const QDateTime cue_last_modified = file_info.lastModified();
return cue_last_modified.isValid() ? cue_last_modified.toTime_t() : 0;
}
void LibraryWatcher::AddWatch(const Directory& dir, const QString& path) {
QFileInfo info(path);
if (!info.exists() || !info.isReadable()) return;
connect(fs_watcher_, SIGNAL(PathChanged(const QString&)), this,
SLOT(DirectoryChanged(const QString&)), Qt::UniqueConnection);
if (!fs_watcher_->AddPath(path)) {
// Since this may be a system error, don't spam the user.
static int errCount = 0;
if (errCount++ == 0) {
#ifdef Q_OS_LINUX
// The Linux implementation of QFileSystemWatcher utilizes inotify, so
// the limit in /proc/sys/fs/inotify/max_user_watches may be a problem
// in large libraries.
const char* fmt =
"Failed to watch %1\n"
"On a Linux system, this may be due to the inotify max_user_watches "
"limit.\n\n"
"This error will not be shown again during this session.";
#else
const char* fmt =
"Failed to watch %1 for unknown reasons.\n\n"
"This error will not be shown again during this session.";
#endif
emit Error(tr(fmt).arg(path));
}
return;
}
subdir_mapping_[path] = dir;
}
void LibraryWatcher::RemoveWatch(const Directory& dir,
const Subdirectory& subdir) {
for (const QString& subdir_path : subdir_mapping_.keys(dir)) {
if (subdir_path != subdir.path) continue;
fs_watcher_->RemovePath(subdir_path);
subdir_mapping_.remove(subdir_path);
break;
}
}
void LibraryWatcher::RemoveDirectory(int dir_id) {
watched_dirs_.Stop(dir_id);
// Invoke the DoRemoveDirectory slot on the watcher's thread.
QMetaObject::invokeMethod(this, "DoRemoveDirectory", Q_ARG(int, dir_id));
}
void LibraryWatcher::DoRemoveDirectory(int dir_id) {
rescan_queue_.remove(dir_id);
const WatchedDir& dir = watched_dirs_.list_[dir_id];
// Stop watching the directory's subdirectories
for (const QString& subdir_path : subdir_mapping_.keys(dir)) {
fs_watcher_->RemovePath(subdir_path);
subdir_mapping_.remove(subdir_path);
}
watched_dirs_.Remove(dir_id);
}
bool LibraryWatcher::FindSongByPath(const SongList& list, const QString& path,
Song* out) {
// TODO: Make this faster
for (const Song& song : list) {
if (song.url().toLocalFile() == path) {
*out = song;
return true;
}
}
return false;
}
void LibraryWatcher::DirectoryChanged(const QString& subdir) {
// Find what dir it was in
QHash<QString, Directory>::const_iterator it =
subdir_mapping_.constFind(subdir);
if (it == subdir_mapping_.constEnd()) {
return;
}
Directory dir = *it;
qLog(Debug) << "Subdir" << subdir << "changed under directory" << dir.path
<< "id" << dir.id;
// Queue the subdir for rescanning
if (!rescan_queue_[dir.id].contains(subdir)) rescan_queue_[dir.id] << subdir;
if (!rescan_paused_) rescan_timer_->start();
}
void LibraryWatcher::RescanPathsNow() {
for (int id : rescan_queue_.keys()) {
if (!watched_dirs_.list_.contains(id)) {
qLog(Warning) << "Rescan id" << id << "not in watch list.";
continue;
}
const WatchedDir& dir = watched_dirs_.list_[id];
if (!dir.active_) continue;
ScanTransaction transaction(this, dir, false);
transaction.AddToProgressMax(rescan_queue_[id].count());
for (const QString& path : rescan_queue_[id]) {
if (transaction.aborted()) return;
Subdirectory subdir;
subdir.directory_id = id;
subdir.mtime = 0;
subdir.path = path;
ScanSubdirectory(path, subdir, &transaction);
}
}
rescan_queue_.clear();
emit CompilationsNeedUpdating();
}
QString LibraryWatcher::PickBestImage(const QStringList& images,
ScanTransaction* t) {
// This is used when there is more than one image in a directory.
// Pick the biggest image that matches the most important filter
QStringList filtered;
for (const QString& filter_text : best_image_filters_) {
// the images in the images list are represented by a full path,
// so we need to isolate just the filename
for (const QString& image : images) {
QFileInfo file_info(image);
QString filename(file_info.fileName());
if (filename.contains(filter_text, Qt::CaseInsensitive))
filtered << image;
}
/* We assume the filters are give in the order best to worst, so
if we've got a result, we go with it. Otherwise we might
start capturing more generic rules */
if (!filtered.isEmpty()) break;
}
if (filtered.isEmpty()) {
// If we're scanning a device, we may hit a directory that contains
// multiple types of media. An example is a camera directory on a smart
// phone that contains JPG and MP4. We don't want to cycle through hundreds
// of images for each audio file found, so we've set a threshold to try to
// detect this case.
if (images.count() > kUnfilteredImageLimit) {
return "";
}
// the filter was too restrictive, just use the original list
filtered = images;
}
int biggest_size = 0;
QString biggest_path;
for (const QString& path : filtered) {
if (t->aborted()) return "";
QImage image(path);
if (image.isNull()) continue;
int size = image.width() * image.height();
if (size > biggest_size) {
biggest_size = size;
biggest_path = path;
}
}
return biggest_path;
}
QString LibraryWatcher::ImageForSong(const QString& path,
QMap<QString, QStringList>* album_art,
ScanTransaction* t) {
QString dir(DirectoryPart(path));
if (album_art->contains(dir)) {
if (album_art->value(dir).count() == 1)
return album_art->value(dir)[0];
else {
QString best_image = PickBestImage(album_art->value(dir), t);
album_art->insert(dir, QStringList() << best_image);
return best_image;
}
}
return QString();
}
void LibraryWatcher::ReloadSettingsAsync() {
QMetaObject::invokeMethod(this, "ReloadSettings", Qt::QueuedConnection);
}
void LibraryWatcher::ReloadSettings() {
const bool was_monitoring_before = monitor_;
QSettings s;
s.beginGroup(kSettingsGroup);
scan_on_startup_ = s.value("startup_scan", true).toBool();
monitor_ = s.value("monitor", true).toBool();
best_image_filters_.clear();
QStringList filters = s.value("cover_art_patterns", QStringList() << "front"
<< "cover")
.toStringList();
for (const QString& filter : filters) {
QString s = filter.trimmed();
if (!s.isEmpty()) best_image_filters_ << s;
}
skip_file_extensions_.clear();
QStringList extensions = s.value("skip_file_extensions").toStringList();
for (const QString& extension : extensions) {
QString s = extension.trimmed().toLower();
if (!s.isEmpty()) skip_file_extensions_ << s;
}
if (!monitor_ && was_monitoring_before) {
fs_watcher_->Clear();
} else if (monitor_ && !was_monitoring_before) {
// Add all directories to all QFileSystemWatchers again
for (const Directory& dir : watched_dirs_.list_.values()) {
SubdirectoryList subdirs = backend_->SubdirsInDirectory(dir.id);
for (const Subdirectory& subdir : subdirs) {
AddWatch(dir, subdir.path);
}
}
}
}
void LibraryWatcher::SetRescanPausedAsync(bool pause) {
QMetaObject::invokeMethod(this, "SetRescanPaused", Qt::QueuedConnection,
Q_ARG(bool, pause));
}
void LibraryWatcher::SetRescanPaused(bool pause) {
rescan_paused_ = pause;
if (!rescan_paused_ && !rescan_queue_.isEmpty()) RescanPathsNow();
}
void LibraryWatcher::IncrementalScanAsync() {
QMetaObject::invokeMethod(this, "IncrementalScanNow", Qt::QueuedConnection);
}
void LibraryWatcher::FullScanAsync() {
QMetaObject::invokeMethod(this, "FullScanNow", Qt::QueuedConnection);
}
void LibraryWatcher::IncrementalScanNow() { PerformScan(true, false); }
void LibraryWatcher::FullScanNow() { PerformScan(false, true); }
void LibraryWatcher::PerformScan(bool incremental, bool ignore_mtimes) {
for (const WatchedDir& dir : watched_dirs_.list_.values()) {
qLog(Debug) << "Scanning library directory" << dir.GetPath();
ScanTransaction transaction(this, dir, incremental, ignore_mtimes);
SubdirectoryList subdirs(transaction.GetAllSubdirs());
// On Linux systems, if the library directory is deleted then re-created,
// inotify won't find it. This could be corrected by watching parent
// directories, but not worth the complexity for an edge case.
if (subdirs.isEmpty()) {
qLog(Debug) << "Library directory wasn't in subdir list.";
Subdirectory subdir;
subdir.path = dir.GetPath();
subdir.directory_id = dir.GetId();
subdirs << subdir;
}
transaction.AddToProgressMax(subdirs.count());
for (const Subdirectory& subdir : subdirs) {
if (transaction.aborted()) return;
ScanSubdirectory(subdir.path, subdir, &transaction);
}
}
emit CompilationsNeedUpdating();
}
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