qt: Add API to get the context for a Job

* lang/qt/src/job.cpp,
lang/qt/src/job.h (Job::context): New.
* lang/qt/src/threadedjobmixin.cpp
(ThreadedJobMixin::~ThreadedJobMixin): New. Unregister context.
(ThreadedJobMixin::lateInitialization): Register context.
* NEWS: Update for cpp and qt.

--
The global map hack is necessary because the job class does
not know about the context which is held in threadedjobmixin.
Adding a virtual function in Job would be an ABI break which
I'd like to avoid at this point. Although QGpgME's API will
need a big ABI break to make it ABI maintainable. The virtual
jobs -> implementation classes are nearly unmaintainable ABI wise.

The context is exposed to provide more flexibility to users, e.g.
to add a passphrase callback or to set the sender in a context.

1 files changed, 9 insertions, 1 deletions

diff --git a/lang/qt/src/job.cpp b/lang/qt/src/job.cpp
index 38dbc995..9ae3f314 100644
--- a/lang/qt/src/job.cpp
+++ b/lang/qt/src/job.cpp
@@ -62,6 +62,7 @@
 #include "keyformailboxjob.h"
 #include "wkspublishjob.h"
 #include "tofupolicyjob.h"
+#include "threadedjobmixin.h"
 
 #include <QCoreApplication>
 #include <QDebug>
@@ -78,7 +79,6 @@ QGpgME::Job::Job(QObject *parent)
 
 QGpgME::Job::~Job()
 {
-
 }
 
 QString QGpgME::Job::auditLogAsHtml() const
@@ -98,6 +98,14 @@ bool QGpgME::Job::isAuditLogSupported() const
     return auditLogError().code() != GPG_ERR_NOT_IMPLEMENTED;
 }
 
+QMap <QGpgME::Job *, GpgME::Context *> QGpgME::g_context_map;
+
+/* static */
+GpgME::Context *QGpgME::Job::context(QGpgME::Job *job)
+{
+    return QGpgME::g_context_map.value (job, nullptr);
+}
+
 #define make_job_subclass_ext(x,y)                \
     QGpgME::x::x( QObject * parent ) : y( parent ) {} \
     QGpgME::x::~x() {}