fix #2976

on linux logs goes to ~/.cache/...
and screenshots goes to ~/.local/share/...

src/main.cpp

@@ -129,7 +129,8 @@ int main(int argc, char *argv[])
     sodium_init(); // For the auto-updater
 
 #ifdef LOG_TO_FILE
-    QString logFileDir = Settings::getInstance().getSettingsDirPath();
+    QString logFileDir = Settings::getInstance().getAppCacheDirPath();
+    QDir(logFileDir).mkpath(".");
     logFileStream.reset(new QTextStream);
     logFileFile.reset(new QFile(logFileDir + "qtox.log"));
 

src/persistence/settings.cpp

@@ -551,6 +551,44 @@ QString Settings::getSettingsDirPath()
 #endif
 }
 
+QString Settings::getAppDataDirPath()
+{
+    QMutexLocker locker{&bigLock};
+    if (makeToxPortable)
+        return QString(".")+QDir::separator();
+
+    // workaround for https://bugreports.qt-project.org/browse/QTBUG-38845
+#ifdef Q_OS_WIN
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + QDir::separator()
+                           + "AppData" + QDir::separator() + "Roaming" + QDir::separator() + "tox")+QDir::separator();
+#elif defined(Q_OS_OSX)
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + QDir::separator()
+                           + "Library" + QDir::separator() + "Application Support" + QDir::separator() + "Tox")+QDir::separator();
+#else
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation)
+                           + QDir::separator() + "tox")+QDir::separator();
+#endif
+}
+
+QString Settings::getAppCacheDirPath()
+{
+    QMutexLocker locker{&bigLock};
+    if (makeToxPortable)
+        return QString(".")+QDir::separator();
+
+    // workaround for https://bugreports.qt-project.org/browse/QTBUG-38845
+#ifdef Q_OS_WIN
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + QDir::separator()
+                           + "AppData" + QDir::separator() + "Roaming" + QDir::separator() + "tox")+QDir::separator();
+#elif defined(Q_OS_OSX)
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + QDir::separator()
+                           + "Library" + QDir::separator() + "Application Support" + QDir::separator() + "Tox")+QDir::separator();
+#else
+    return QDir::cleanPath(QStandardPaths::writableLocation(QStandardPaths::CacheLocation)
+                           + QDir::separator() + "tox")+QDir::separator();
+#endif
+}
+
 const QList<DhtServer>& Settings::getDhtServerList() const
 {
     QMutexLocker locker{&bigLock};

src/persistence/settings.h

@@ -42,6 +42,8 @@ public:
     static Settings& getInstance();
     static void destroyInstance();
     QString getSettingsDirPath(); ///< The returned path ends with a directory separator
+    QString getAppDataDirPath(); ///< The returned path ends with a directory separator
+    QString getAppCacheDirPath(); ///< The returned path ends with a directory separator
 
     void createSettingsDir(); ///< Creates a path to the settings dir, if it doesn't already exist
     void createPersonal(QString basename); ///< Write a default personal .ini settings file for a profile

src/widget/form/chatform.cpp

@@ -774,7 +774,7 @@ void ChatForm::doScreenshot()
     connect(screenshotGrabber, &ScreenshotGrabber::screenshotTaken, this, &ChatForm::onScreenshotTaken);
     screenshotGrabber->showGrabber();
     // Create dir for screenshots
-    QDir(Settings::getInstance().getSettingsDirPath()).mkdir("screenshots");
+    QDir(Settings::getInstance().getAppDataDirPath()).mkdir("screenshots");
 }
 
 void ChatForm::onScreenshotTaken(const QPixmap &pixmap) {
@@ -783,7 +783,7 @@ void ChatForm::onScreenshotTaken(const QPixmap &pixmap) {
     // Windows has to be supported, thus filename can't have `:` in it :/
     // Format should be: `qTox_Screenshot_yyyy-MM-dd HH-mm-ss.zzz.png`
     QString filepath = QString("%1screenshots%2qTox_Screenshot_%3.png")
-                           .arg(Settings::getInstance().getSettingsDirPath())
+                           .arg(Settings::getInstance().getAppDataDirPath())
                            .arg(QDir::separator())
                            .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd HH-mm-ss.zzz"));