Convert okular_part.desktop to okular_part.json and use it.

Also fixed the deprecation warning in the generator plugins.
Thanks to Alexander Lohnau

CMakeLists.txt

@@ -622,17 +622,20 @@ set_target_properties(okularpart PROPERTIES PREFIX "")
 if (Qt5TextToSpeech_FOUND)
    target_link_libraries(okularpart Qt5::TextToSpeech)
 endif()
+
+# TODO: Don't install okular_part.desktop once we are kf6 based
+#instead install the part to this path so it can be found
+#install(TARGETS okularpart DESTINATION ${KDE_INSTALL_PLUGINDIR}/kf6/parts/ )
 install(TARGETS okularpart DESTINATION ${KDE_INSTALL_PLUGINDIR})
-endif()
+install( FILES okular_part.desktop  DESTINATION  ${KDE_INSTALL_KSERVICES5DIR} )
+
+endif()# End of BUILD_DESKTOP if
 
 
 ########### install files ###############
 
 install(FILES okular.upd DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})
-
-install( FILES okular_part.desktop  DESTINATION  ${KDE_INSTALL_KSERVICES5DIR} )
 install( FILES part/part.rc part/part-viewermode.rc DESTINATION ${KDE_INSTALL_KXMLGUI5DIR}/okular )
-
 install(FILES okular.categories  DESTINATION  ${KDE_INSTALL_LOGGINGCATEGORIESDIR})
 
 ki18n_install(po)

generators/CMakeLists.txt

@@ -1,7 +1,6 @@
 
 function(okular_add_generator _target)
   kcoreaddons_add_plugin(${_target}
-    JSON "lib${_target}.json"
     INSTALL_NAMESPACE "okular/generators"
     SOURCES ${ARGN}
   )

okular_part.json

@@ -0,0 +1,77 @@
+{
+    "KPlugin": {
+        "Icon": "okular",
+        "MimeTypes": [
+            "application/vnd.kde.okular-archive"
+        ],
+        "Name": "Okular",
+        "Name[ar]": "اوكلار",
+        "Name[az]": "Okular",
+        "Name[be]": "Okular",
+        "Name[bg]": "Okular",
+        "Name[bs]": "Okular",
+        "Name[ca@valencia]": "Okular",
+        "Name[ca]": "Okular",
+        "Name[cs]": "Okular",
+        "Name[da]": "Okular",
+        "Name[de]": "Okular",
+        "Name[el]": "Okular",
+        "Name[en_GB]": "Okular",
+        "Name[eo]": "Okular",
+        "Name[es]": "Okular",
+        "Name[et]": "Okular",
+        "Name[eu]": "Okular",
+        "Name[fi]": "Okular",
+        "Name[fr]": "Okular",
+        "Name[ga]": "Okular",
+        "Name[gl]": "Okular",
+        "Name[hne]": "ओकुलर",
+        "Name[hr]": "Okular",
+        "Name[hu]": "Okular",
+        "Name[ia]": "Okular",
+        "Name[ie]": "Okular",
+        "Name[is]": "Okular",
+        "Name[it]": "Okular",
+        "Name[ja]": "Okular",
+        "Name[ka]": "Okular",
+        "Name[kk]": "Okular",
+        "Name[km]": "Okular",
+        "Name[ko]": "Okular",
+        "Name[ku]": "Okular",
+        "Name[lt]": "Okular",
+        "Name[lv]": "Okular",
+        "Name[mr]": "ओक्युलर",
+        "Name[nb]": "Okular",
+        "Name[nds]": "Okular",
+        "Name[nl]": "Okular",
+        "Name[nn]": "Okular",
+        "Name[pa]": "ਓਕੁਲਾਰ",
+        "Name[pl]": "Okular",
+        "Name[pt]": "Okular",
+        "Name[pt_BR]": "Okular",
+        "Name[ro]": "Okular",
+        "Name[ru]": "Okular",
+        "Name[si]": "Okular",
+        "Name[sk]": "Okular",
+        "Name[sl]": "Okular",
+        "Name[sq]": "Okular",
+        "Name[sr@ijekavian]": "Окулар",
+        "Name[sr@ijekavianlatin]": "Okular",
+        "Name[sr@latin]": "Okular",
+        "Name[sr]": "Окулар",
+        "Name[sv]": "Okular",
+        "Name[ta]": "ஆக்குலர்",
+        "Name[th]": "โอกูลาร์",
+        "Name[tr]": "Okular",
+        "Name[ug]": "Okular",
+        "Name[uk]": "Okular",
+        "Name[vi]": "Okular",
+        "Name[x-test]": "xxOkularxx",
+        "Name[zh_CN]": "Okular 文档查看器",
+        "Name[zh_TW]": "Okular",
+        "ServiceTypes": [
+            "KParts/ReadOnlyPart",
+            "KParts/ReadWritePart"
+        ]
+    }
+}

part/part.cpp

@@ -187,7 +187,7 @@ private:
 };
 #endif
 
-K_PLUGIN_FACTORY(OkularPartFactory, registerPlugin<Okular::Part>();)
+K_PLUGIN_FACTORY_WITH_JSON(OkularPartFactory, "okular_part.json", registerPlugin<Okular::Part>();)
 
 static QAction *actionForExportFormat(const Okular::ExportFormat &format, QObject *parent = Q_NULLPTR)
 {