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#include "iconfetcher.h"
#include "shared/util.h"
#include "thread_utils.h"
void IconFetcher::Waiter::wait()
{
std::unique_lock lock(m_wakeUpMutex);
m_wakeUp.wait(lock, [&] {
return m_queueAvailable;
});
m_queueAvailable = false;
}
void IconFetcher::Waiter::wakeUp()
{
{
std::scoped_lock lock(m_wakeUpMutex);
m_queueAvailable = true;
}
m_wakeUp.notify_one();
}
IconFetcher::IconFetcher() : m_iconSize(GetSystemMetrics(SM_CXSMICON)), m_stop(false)
{
m_quickCache.file = getPixmapIcon(QFileIconProvider::File);
m_quickCache.directory = getPixmapIcon(QFileIconProvider::Folder);
m_thread = MOShared::startSafeThread([&] {
threadFun();
});
}
IconFetcher::~IconFetcher()
{
stop();
m_thread.join();
}
void IconFetcher::stop()
{
m_stop = true;
m_waiter.wakeUp();
}
QVariant IconFetcher::icon(const QString& path) const
{
if (hasOwnIcon(path)) {
return fileIcon(path);
} else {
const auto dot = path.lastIndexOf(".");
if (dot == -1) {
// no extension
return m_quickCache.file;
}
return extensionIcon(QStringView{path}.mid(dot));
}
}
QPixmap IconFetcher::genericFileIcon() const
{
return m_quickCache.file;
}
QPixmap IconFetcher::genericDirectoryIcon() const
{
return m_quickCache.directory;
}
bool IconFetcher::hasOwnIcon(const QString& path) const
{
static const QString exe = ".exe";
static const QString lnk = ".lnk";
static const QString ico = ".ico";
return path.endsWith(exe, Qt::CaseInsensitive) ||
path.endsWith(lnk, Qt::CaseInsensitive) ||
path.endsWith(ico, Qt::CaseInsensitive);
}
void IconFetcher::threadFun()
{
MOShared::SetThisThreadName("IconFetcher");
while (!m_stop) {
m_waiter.wait();
if (m_stop) {
break;
}
checkCache(m_extensionCache);
checkCache(m_fileCache);
}
}
void IconFetcher::checkCache(Cache& cache)
{
std::set<QString> queue;
{
std::scoped_lock lock(cache.queueMutex);
queue = std::move(cache.queue);
cache.queue.clear();
}
if (queue.empty()) {
return;
}
std::map<QString, QPixmap> map;
for (auto&& ext : queue) {
map.emplace(std::move(ext), getPixmapIcon(QFileInfo(ext)));
}
{
std::scoped_lock lock(cache.mapMutex);
for (auto&& p : map) {
cache.map.insert(std::move(p));
}
}
}
void IconFetcher::queue(Cache& cache, QString path) const
{
{
std::scoped_lock lock(cache.queueMutex);
cache.queue.insert(std::move(path));
}
m_waiter.wakeUp();
}
QVariant IconFetcher::fileIcon(const QString& path) const
{
{
std::scoped_lock lock(m_fileCache.mapMutex);
auto itor = m_fileCache.map.find(path);
if (itor != m_fileCache.map.end()) {
return itor->second;
}
}
queue(m_fileCache, path);
return {};
}
QVariant IconFetcher::extensionIcon(const QStringView& ext) const
{
{
std::scoped_lock lock(m_extensionCache.mapMutex);
auto itor = m_extensionCache.map.find(ext);
if (itor != m_extensionCache.map.end()) {
return itor->second;
}
}
queue(m_extensionCache, ext.toString());
return {};
}
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