qt: Add QDebug stream operator for GpgME::Error

* lang/qt/src/Makefile.am: Add new files.
* lang/qt/src/debug.h, lang/qt/src/debug.cpp: New.
* NEWS: Mention it.
--

This was previously implemented in Kleopatra, but it makes sense for
all users of qgpgme.

NEWS

@@ -9,6 +9,8 @@ Noteworthy changes in version 1.14.1 (unreleased)
  * qt: Extended ChangeExpiryJob to support changing the expiry of
    subkeys. [#4717]
 
+ * qt: Added QDebug stream operator for GpgME::Error.
+
  * Interface changes relative to the 1.14.0 release:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  gpgme_op_setexpire_start                   NEW.
@@ -18,6 +20,7 @@ Noteworthy changes in version 1.14.1 (unreleased)
  cpp: EngineInfo::Version::operator<=       NEW.
  cpp: EngineInfo::Version::operator>=       NEW.
  cpp: EngineInfo::Version::operator!=       NEW.
+ qt: operator<<(QDebug debug, const GpgME::Error &err) NEW.
 
 
 Noteworthy changes in version 1.14.0 (2020-07-16)

lang/qt/src/Makefile.am

@@ -24,7 +24,9 @@ EXTRA_DIST = QGpgmeConfig.cmake.in.in QGpgmeConfigVersion.cmake.in \
              QGpgmeConfig.cmake.in.in
 
 qgpgme_sources = \
-    dataprovider.cpp job.cpp multideletejob.cpp qgpgmeadduseridjob.cpp \
+    dataprovider.cpp \
+    debug.cpp \
+    job.cpp multideletejob.cpp qgpgmeadduseridjob.cpp \
     qgpgmebackend.cpp qgpgmechangeexpiryjob.cpp qgpgmechangeownertrustjob.cpp \
     qgpgmechangepasswdjob.cpp qgpgmedecryptjob.cpp \
     qgpgmedecryptverifyjob.cpp qgpgmedeletejob.cpp qgpgmedownloadjob.cpp \
@@ -49,6 +51,7 @@ qgpgme_headers= \
     changeownertrustjob.h \
     changepasswdjob.h \
     dataprovider.h \
+    debug.h \
     decryptjob.h \
     decryptverifyjob.h \
     downloadjob.h \
@@ -89,6 +92,7 @@ camelcase_headers= \
     ChangeOwnerTrustJob \
     ChangePasswdJob \
     DataProvider \
+    Debug \
     DecryptJob \
     DecryptVerifyJob \
     DN \

lang/qt/src/debug.cpp

@@ -0,0 +1,48 @@
+/*
+    debug.cpp
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2020 g10 Code GmbH
+    Software engineering by Ingo Klöcker <dev@ingo-kloecker.de>
+
+    QGpgME is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.
+
+    QGpgME is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include "error.h"
+
+#include <QDebug>
+
+QDebug operator<<(QDebug debug, const GpgME::Error &err)
+{
+    const bool oldSetting = debug.autoInsertSpaces();
+    debug.nospace() << err.asString() << " (code: " << err.code() << ", source: " << err.source() << ")";
+    debug.setAutoInsertSpaces(oldSetting);
+    return debug.maybeSpace();
+}

lang/qt/src/debug.h

@@ -0,0 +1,46 @@
+/*
+    debug.h
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2020 g10 Code GmbH
+    Software engineering by Ingo Klöcker <dev@ingo-kloecker.de>
+
+    QGpgME is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.
+
+    QGpgME is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifndef QGPGME_DEBUG_H
+#define QGPGME_DEBUG_H
+
+namespace GpgME
+{
+class Error;
+}
+
+class QDebug;
+
+QDebug operator<<(QDebug debug, const GpgME::Error &err);
+
+#endif // QGPGME_DEBUG_H