lok: allow libraries to pre-init themselves.

Populate static module references before entering a jail
containing no code.

Implement for scfilt, scui, swui, sdui.

Change-Id: I8fec2aa78e67053a7945926c818122bd4290103c
Reviewed-on: https://gerrit.libreoffice.org/49545Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
(cherry picked from commit f215096c)

cppuhelper/source/servicemanager.cxx

@@ -1974,6 +1974,19 @@ void cppuhelper::ServiceManager::preloadImplementations() {
                 iterator->second->status = Data::Implementation::STATUS_LOADED;
 
             }
+
+            // Some libraries use other (non-UNO) libraries requiring preinit
+            oslGenericFunction fpPreload = aModule.getFunctionSymbol( "lok_preload_hook" );
+            if (fpPreload)
+            {
+                static std::vector<oslGenericFunction> aPreloaded;
+                if (std::find(aPreloaded.begin(), aPreloaded.end(), fpPreload) == aPreloaded.end())
+                {
+                    aPreloaded.push_back(fpPreload);
+                    fpPreload();
+                }
+            }
+
             // leak aModule
             aModule.release();
         }

sc/source/ui/app/scdll.cxx

@@ -106,6 +106,7 @@
 #include <dwfunctr.hxx>
 #include <acredlin.hxx>
 #include <o3tl/make_unique.hxx>
+#include <filter.hxx>
 #include <scabstdlg.hxx>
 
 OUString ScResId(const char* pId)
@@ -266,4 +267,14 @@ void ScDLL::Init()
     //  StarOne Services are now handled in the registry
 }
 
+extern "C" SAL_DLLPUBLIC_EXPORT
+void lok_preload_hook()
+{
+    // scfilt
+    ScFormatFilter::Get();
+    // scui
+    ScAbstractDialogFactory::Create();
+}
+
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sc/source/ui/docshell/impex.cxx

@@ -2308,7 +2308,9 @@ ScFormatFilterPlugin &ScFormatFilter::Get()
 #ifndef DISABLE_DYNLOADING
     OUString sFilterLib(SVLIBRARY("scfilt"));
     static ::osl::Module aModule;
-    bool bLoaded = aModule.loadRelative(&thisModule, sFilterLib);
+    bool bLoaded = aModule.is();
+    if (!bLoaded)
+        bLoaded = aModule.loadRelative(&thisModule, sFilterLib);
     if (!bLoaded)
         bLoaded = aModule.load(sFilterLib);
     if (bLoaded)

sd/source/ui/app/sddll.cxx

@@ -96,6 +96,7 @@
 #include <vcl/FilterConfigItem.hxx>
 #include <comphelper/processfactory.hxx>
 #include <o3tl/make_unique.hxx>
+#include <sdabstdlg.hxx>
 
 using namespace ::com::sun::star;
 
@@ -289,4 +290,10 @@ void SdDLL::Init()
 #endif
 }
 
+extern "C" SAL_DLLPUBLIC_EXPORT
+void lok_preload_hook()
+{
+    SdAbstractDialogFactory::Create();
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sw/source/uibase/app/swdll.cxx

@@ -45,6 +45,7 @@
 
 #include <swacorr.hxx>
 #include <unomid.h>
+#include <swabstdlg.hxx>
 
 #include "swdllimpl.hxx"
 #include <o3tl/make_unique.hxx>
@@ -171,4 +172,10 @@ sw::Filters & SwDLL::getFilters()
     return *filters_.get();
 }
 
+extern "C" SAL_DLLPUBLIC_EXPORT
+void lok_preload_hook()
+{
+    SwAbstractDialogFactory::Create();
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */