Use .qupzilla/tmp instead of /tmp.

- use it for downloading temporary files that are going
  to be opened
- this directory will be cleaned upon application close

src/lib/app/mainapplication.cpp

@@ -665,6 +665,7 @@ void MainApplication::saveSettings()
     m_networkmanager->saveCertificates();
     m_plugins->shutdown();
     qIconProvider->saveIconsToDatabase();
+    clearTempPath();
 
     AdBlockManager::instance()->save();
     QFile::remove(currentProfilePath() + "WebpageIcons.db");
@@ -992,6 +993,25 @@ QString MainApplication::currentStyle() const
     return m_proxyStyle->baseStyle()->objectName();
 }
 
+void MainApplication::clearTempPath()
+{
+    QString path = PROFILEDIR + "tmp/";
+    QDir dir(path);
+
+    if (dir.exists())
+        qz_removeDir(path);
+}
+
+QString MainApplication::tempPath() const
+{
+    QString path = PROFILEDIR + "tmp/";
+    QDir dir(path);
+    if (!dir.exists())
+        dir.mkdir(path);
+
+    return path;
+}
+
 MainApplication::~MainApplication()
 {
     delete m_uaManager;

src/lib/app/mainapplication.h

@@ -83,9 +83,11 @@ public:
 
     bool checkSettingsDir();
     void destroyRestoreManager();
+    void clearTempPath();
 
     void setProxyStyle(ProxyStyle* style);
     QString currentStyle() const;
+    QString tempPath() const;
 
     QupZilla* getWindow();
     CookieManager* cookieManager();

src/lib/desktopnotifications/desktopnotificationsfactory.cpp

@@ -78,7 +78,7 @@ void DesktopNotificationsFactory::showNotification(const QPixmap &icon, const QS
         break;
     case DesktopNative:
 #if defined(Q_WS_X11) && !defined(DISABLE_DBUS)
-        QFile tmp(QDir::tempPath() + "/qupzilla_notif.png");
+        QFile tmp(mApp->tempPath() + "/qupzilla_notif.png");
         tmp.open(QFile::WriteOnly);
         icon.save(tmp.fileName());
 
@@ -105,7 +105,7 @@ void DesktopNotificationsFactory::showNotification(const QPixmap &icon, const QS
 void DesktopNotificationsFactory::nativeNotificationPreview()
 {
 #if defined(Q_WS_X11) && !defined(DISABLE_DBUS)
-    QFile tmp(QDir::tempPath() + "/qupzilla_notif.png");
+    QFile tmp(mApp->tempPath() + "/qupzilla_notif.png");
     tmp.open(QFile::WriteOnly);
     QPixmap(":icons/preferences/dialog-question.png").save(tmp.fileName());
 

src/lib/downloads/downloadfilehelper.cpp

@@ -182,7 +182,7 @@ void DownloadFileHelper::optionsDialogAccepted(int finish)
         }
     }
     else {
-        fileNameChoosed(QDir::tempPath() + "/" + m_h_fileName, true);
+        fileNameChoosed(mApp->tempPath() + "/" + m_h_fileName, true);
     }
 }
 
@@ -210,7 +210,7 @@ void DownloadFileHelper::fileNameChoosed(const QString &name, bool fileNameAutoG
         m_fileName = qz_ensureUniqueFilename(m_fileName);
     }
 
-    if (!m_path.contains(QDir::tempPath())) {
+    if (!m_path.contains(mApp->tempPath())) {
         m_lastDownloadPath = m_path;
     }
 

src/plugins/GreaseMonkey/gm_addscriptdialog.cpp

@@ -66,7 +66,7 @@ void GM_AddScriptDialog::showSource()
         return;
     }
 
-    const QString &tmpFileName = qz_ensureUniqueFilename(QDir::tempPath() + "/tmp-userscript.js");
+    const QString &tmpFileName = qz_ensureUniqueFilename(mApp->tempPath() + "/tmp-userscript.js");
 
     if (QFile::copy(m_script->fileName(), tmpFileName)) {
         int index = qz->tabWidget()->addView(QUrl::fromLocalFile(tmpFileName), Qz::NT_SelectedTabAtTheEnd);