WASM --enable-wasm-strip now skips lots of LO code

... resulting in a stripped-down, Writer-only build to decrease
the resulting WASM bytecode size.

It removes the following code from the build:
* All other major modules: Base, Calc, Chart, Draw, Impress and
Math and related writerperfect filters
* The premultiply tables
* The (auto-)recovery functionality
* All accessibility (but not the accessibility document checker)
* The LanguageGuess component
* EPUB support
* The start center / BackingWindow
* The TipOfTheDay functionality
* The splash screen communication

Currently crashs with anything different then soffice --writer.
Closing the document also still crashes.

FYI: many of these features are now behind ENABLE_WASM_STRIP_*
defines, but they normally don't work on their own, globally!
That's because we started with stripping the main components.

Change-Id: Ib9c0f9452815910c0a2aceaf142ba1ad4a9cb0d7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126182
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

2 files changed, 32 insertions, 3 deletions

diff --git a/desktop/Module_desktop.mk b/desktop/Module_desktop.mk
index 191a2cba4c6f..d160bc6128dc 100644
--- a/desktop/Module_desktop.mk
+++ b/desktop/Module_desktop.mk
@@ -20,7 +20,7 @@ $(eval $(call gb_Module_add_targets,desktop,\
     $(if $(ENABLE_BREAKPAD), \
         Library_crashreport \
         ) \
-    $(if $(DISABLE_GUI),,Library_spl) \
+    $(if $(or $(DISABLE_GUI),$(ENABLE_WASM_STRIP_SPLASH)),,Library_spl) \
     Package_branding \
     $(if $(CUSTOM_BRAND_DIR),Package_branding_custom) \
     UIConfig_deployment \
@@ -103,7 +103,7 @@ $(eval $(call gb_Module_add_targets,desktop,\
 ))
 endif
 
-endif
+endif # $(OS)
 
 ifneq (,$(filter Extension_test-active,$(MAKECMDGOALS)))
 $(eval $(call gb_Module_add_targets,desktop, \
diff --git a/desktop/source/app/app.cxx b/desktop/source/app/app.cxx
index 32d5b31278c1..b14c0d94299a 100644
--- a/desktop/source/app/app.cxx
+++ b/desktop/source/app/app.cxx
@@ -24,6 +24,7 @@
 #include <config_java.h>
 #include <config_folders.h>
 #include <config_extensions.h>
+#include <config_wasm_strip.h>
 
 #include <sal/config.h>
 
@@ -99,7 +100,9 @@
 #include <osl/process.h>
 #include <rtl/byteseq.hxx>
 #include <unotools/pathoptions.hxx>
+#if !ENABLE_WASM_STRIP_PINGUSER
 #include <unotools/VersionConfig.hxx>
+#endif
 #include <rtl/bootstrap.hxx>
 #include <vcl/test/GraphicsRenderTests.hxx>
 #include <vcl/glxtestprocess.hxx>
@@ -339,10 +342,12 @@ namespace {
 
 void runGraphicsRenderTests()
 {
+#if !ENABLE_WASM_STRIP_PINGUSER
     if (!utl::isProductVersionUpgraded(false))
     {
         return;
     }
+#endif
     GraphicsRenderTests TestObject;
     TestObject.run();
 }
@@ -967,6 +972,7 @@ struct RefClearGuard
     @param  bEmergencySave
             differs between EMERGENCY_SAVE and RECOVERY
 */
+#if !ENABLE_WASM_STRIP_RECOVERYUI
 bool impl_callRecoveryUI(bool bEmergencySave     ,
                          bool bExistsRecoveryData)
 {
@@ -998,6 +1004,7 @@ bool impl_callRecoveryUI(bool bEmergencySave     ,
     aRet >>= bRet;
     return bRet;
 }
+#endif
 
 bool impl_bringToFrontRecoveryUI()
 {
@@ -1146,9 +1153,11 @@ void Desktop::Exception(ExceptionCategory nCategory)
         // Save all open documents so they will be reopened
         // the next time the application is started
         // returns true if at least one document could be saved...
+#if !ENABLE_WASM_STRIP_RECOVERYUI
         bRestart = impl_callRecoveryUI(
                         true , // force emergency save
                         false);
+#endif
     }
 
     FlushConfiguration();
@@ -1162,8 +1171,10 @@ void Desktop::Exception(ExceptionCategory nCategory)
             osl_removeSignalHandler( pSignalHandler );
 
         restartOnMac(false);
+#if !ENABLE_WASM_STRIP_SPLASH
         if ( m_rSplashScreen.is() )
             m_rSplashScreen->reset();
+#endif
 
         _exit( EXITHELPER_CRASH_WITH_RESTART );
     }
@@ -1266,7 +1277,9 @@ int Desktop::Main()
     Translate::SetReadStringHook(ReplaceStringHookProc);
 
     // Startup screen
+#if !ENABLE_WASM_STRIP_SPLASH
     OpenSplashScreen();
+#endif
 
     SetSplashScreenProgress(10);
 
@@ -1702,8 +1715,10 @@ int Desktop::doShutdown()
     if ( bRR )
     {
         restartOnMac(true);
+#if !ENABLE_WASM_STRIP_SPLASH
         if ( m_rSplashScreen.is() )
             m_rSplashScreen->reset();
+#endif
 
         return EXITHELPER_NORMAL_RESTART;
     }
@@ -1999,8 +2014,9 @@ void Desktop::OpenClients()
     }
     else
     {
-        bool bCrashed            = false;
         bool bExistsRecoveryData = false;
+#if !ENABLE_WASM_STRIP_RECOVERYUI
+        bool bCrashed            = false;
         bool bExistsSessionData  = false;
         bool const bDisableRecovery
             = getenv("OOO_DISABLE_RECOVERY") != nullptr
@@ -2026,6 +2042,7 @@ void Desktop::OpenClients()
                 TOOLS_WARN_EXCEPTION( "desktop.app", "Error during recovery");
             }
         }
+#endif
 
         Reference< XSessionManagerListener2 > xSessionListener;
         try
@@ -2384,6 +2401,7 @@ void Desktop::HandleAppEvent( const ApplicationEvent& rAppEvent )
     }
 }
 
+#if !ENABLE_WASM_STRIP_SPLASH
 void Desktop::OpenSplashScreen()
 {
     const CommandLineArgs &rCmdLine = GetCommandLineArgs();
@@ -2433,31 +2451,42 @@ void Desktop::OpenSplashScreen()
             m_rSplashScreen->start("SplashScreen", 100);
 
 }
+#endif
 
 void Desktop::SetSplashScreenProgress(sal_Int32 iProgress)
 {
+#if ENABLE_WASM_STRIP_SPLASH
+    (void) iProgress;
+#else
     if(m_rSplashScreen.is())
     {
         m_rSplashScreen->setValue(iProgress);
     }
+#endif
 }
 
 void Desktop::SetSplashScreenText( const OUString& rText )
 {
+#if ENABLE_WASM_STRIP_SPLASH
+    (void) rText;
+#else
     if( m_rSplashScreen.is() )
     {
         m_rSplashScreen->setText( rText );
     }
+#endif
 }
 
 void Desktop::CloseSplashScreen()
 {
+#if !ENABLE_WASM_STRIP_SPLASH
     if(m_rSplashScreen.is())
     {
         SolarMutexGuard ensureSolarMutex;
         m_rSplashScreen->end();
         m_rSplashScreen = nullptr;
     }
+#endif
 }