Disable automatic trust database check during initial key listing

This avoids intermittent delays caused by the trust database check when
starting Kleopatra.

GnuPG-bug-id: 6261

CMakeLists.txt

@@ -68,6 +68,9 @@ message(STATUS "GpgME++ Version ${Gpgmepp_VERSION}")
 if (Gpgmepp_VERSION VERSION_GREATER_EQUAL "1.16.0")
     set(GPGMEPP_SUPPORTS_TRUST_SIGNATURES 1)
 endif()
+if (QGpgme_VERSION VERSION_GREATER_EQUAL "1.18.1")
+    set(QGPGME_LISTALLKEYSJOB_HAS_OPTIONS 1)
+endif()
 
 find_package(Boost 1.34.0)
 set_package_properties(Boost PROPERTIES DESCRIPTION "Boost C++ Libraries" URL "https://www.boost.org" TYPE REQUIRED PURPOSE "Boost is required for building most KDEPIM applications")

config-libkleo.h.cmake

 /* Defined if GpgME++ supports trust signatures */
 #cmakedefine GPGMEPP_SUPPORTS_TRUST_SIGNATURES 1
+
+/* Defined if QGpgME::ListAllKeysJob supports setting options */
+#cmakedefine QGPGME_LISTALLKEYSJOB_HAS_OPTIONS 1

src/models/keycache.cpp

@@ -1488,6 +1488,12 @@ Error KeyCache::RefreshKeysJob::Private::startKeyListing(GpgME::Protocol proto)
     if (!job) {
         return Error();
     }
+#ifdef QGPGME_LISTALLKEYSJOB_HAS_OPTIONS
+    if (!m_cache->initialized()) {
+        // avoid delays during the initial key listing
+        job->setOptions(QGpgME::ListAllKeysJob::DisableAutomaticTrustDatabaseCheck);
+    }
+#endif
 
 #if 0
     aheinecke: 2017.01.12: