Native Libraries:

- made C methods `static` (similar to `private` in Java) to avoid that they are added (exported) to shared library symbol table
- macOS and Linux: added `-fvisibility=hidden` to compiler options to mark C methods hidden by default

flatlaf-natives/flatlaf-natives-linux/build.gradle.kts

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import java.io.FileOutputStream
+
 plugins {
 	`cpp-library`
 	`flatlaf-cpp-library`
@@ -67,7 +69,7 @@ tasks {
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf()
+				is Gcc, is Clang -> listOf( "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )
@@ -108,6 +110,29 @@ tasks {
 				into( nativesDir )
 				rename( "libflatlaf-natives-linux.so", libraryName )
 			}
+
+/*dump
+			val dylib = linkedFile.asFile.get()
+			val dylibDir = dylib.parent
+			exec { commandLine( "size", dylib ) }
+			exec {
+				commandLine( "objdump",
+					// commands
+					"--archive-headers",
+					"--section-headers",
+					"--private-headers",
+					"--reloc",
+					"--dynamic-reloc",
+					"--syms",
+					// options
+//					"--private-header",
+					// files
+					dylib )
+				standardOutput = FileOutputStream( "$dylibDir/objdump.txt" )
+			}
+			exec { commandLine( "objdump", "--disassemble-all", dylib ); standardOutput = FileOutputStream( "$dylibDir/disassemble.txt" ) }
+			exec { commandLine( "objdump", "--full-contents", dylib ); standardOutput = FileOutputStream( "$dylibDir/full-contents.txt" ) }
+dump*/
 		}
 	}
 }

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/GtkFileChooser.cpp

@@ -26,8 +26,8 @@
  * @since 3.6
  */
 
-// see X11WmUtils.cpp
-Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
+// declare external methods
+extern Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
 
 //---- class AutoReleaseStringUTF8 --------------------------------------------
 
@@ -55,12 +55,12 @@ public:
 #define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
 #define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
 
-jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
 	jclass stringClass = env->FindClass( "java/lang/String" );
 	return env->NewObjectArray( count, stringClass, NULL );
 }
 
-void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeIndex, jobjectArray fileTypes ) {
+static void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeIndex, jobjectArray fileTypes ) {
 	jint length = env->GetArrayLength( fileTypes );
 	if( length <= 0 )
 		return;
@@ -89,7 +89,7 @@ void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeIndex, jobj
 	}
 }
 
-GdkWindow* getGdkWindow( JNIEnv* env, jobject window ) {
+static GdkWindow* getGdkWindow( JNIEnv* env, jobject window ) {
 	// get the AWT
 	JAWT awt;
 	awt.version = JAWT_VERSION_1_4;

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/X11WmUtils.cpp

@@ -25,11 +25,14 @@
  */
 
 
-bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
-	long data0, long data1, long data2, long data3, long data4 );
-bool isWMHintSupported( Display* display, Window rootWindow, Atom atom );
+// declare exported methods
 Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display** display_return );
 
+// declare internal methods
+static bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
+	long data0, long data1, long data2, long data3, long data4 );
+static bool isWMHintSupported( Display* display, Window rootWindow, Atom atom );
+
 
 //---- JNI methods ------------------------------------------------------------
 
@@ -79,7 +82,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_xS
 		0 );
 }
 
-bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
+static bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
 	long data0, long data1, long data2, long data3, long data4 )
 {
 	// get the AWT
@@ -131,7 +134,7 @@ bool sendEvent( JNIEnv *env, jobject window, const char *atom_name,
 }
 
 
-bool isWMHintSupported( Display* display, Window rootWindow, Atom atom ) {
+static bool isWMHintSupported( Display* display, Window rootWindow, Atom atom ) {
 	Atom type;
 	int format;
 	unsigned long n_atoms;

flatlaf-natives/flatlaf-natives-macos/build.gradle.kts

@@ -72,7 +72,7 @@ tasks {
 
 		compilerArgs.addAll( toolChain.map {
 			when( it ) {
-				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs" )
+				is Gcc, is Clang -> listOf( "-x", "objective-c++", "-mmacosx-version-min=$minOs", "-fvisibility=hidden" )
 				else -> emptyList()
 			}
 		} )

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacFileChooser.mm

@@ -126,10 +126,10 @@
 #define isOptionClear( option ) ((optionsClear & com_formdev_flatlaf_ui_FlatNativeMacLibrary_ ## option) != 0)
 #define isOptionSetOrClear( option ) isOptionSet( option ) || isOptionClear( option )
 
-// declare methods
-NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window );
+// declare external methods
+extern NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window );
 
-jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
 	jclass stringClass = env->FindClass( "java/lang/String" );
 	return env->NewObjectArray( count, stringClass, NULL );
 }

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacWindow.mm

@@ -39,13 +39,15 @@
 @implementation WindowData
 @end
 
-// declare internal methods
+// declare exported methods
 NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window );
-WindowData* getWindowData( NSWindow* nsWindow, bool allocate );
-void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden );
-int getWindowButtonAreaWidth( NSWindow* nsWindow );
-int getWindowTitleBarHeight( NSWindow* nsWindow );
-bool isWindowFullScreen( NSWindow* nsWindow );
+
+// declare internal methods
+static WindowData* getWindowData( NSWindow* nsWindow, bool allocate );
+static void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden );
+static int getWindowButtonAreaWidth( NSWindow* nsWindow );
+static int getWindowTitleBarHeight( NSWindow* nsWindow );
+static bool isWindowFullScreen( NSWindow* nsWindow );
 
 
 NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
@@ -79,7 +81,7 @@ NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
 	return (NSWindow *) jlong_to_ptr( env->GetLongField( platformWindow, ptrID ) );
 }
 
-WindowData* getWindowData( NSWindow* nsWindow, bool allocate ) {
+static WindowData* getWindowData( NSWindow* nsWindow, bool allocate ) {
 	static char key;
 	WindowData* windowData = objc_getAssociatedObject( nsWindow, &key );
 	if( windowData == NULL && allocate ) {
@@ -243,7 +245,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setW
 	return FALSE;
 }
 
-void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden ) {
+static void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden ) {
 	// get buttons
 	NSView* buttons[3] = {
 		[nsWindow standardWindowButton:NSWindowCloseButton],
@@ -303,7 +305,7 @@ JNIEXPORT jobject JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_getWi
 	return NULL;
 }
 
-int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
+static int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
 	// get buttons
 	NSView* buttons[3] = {
 		[nsWindow standardWindowButton:NSWindowCloseButton],
@@ -335,7 +337,7 @@ int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
 	return right + left;
 }
 
-int getWindowTitleBarHeight( NSWindow* nsWindow ) {
+static int getWindowTitleBarHeight( NSWindow* nsWindow ) {
 	NSView* closeButton = [nsWindow standardWindowButton:NSWindowCloseButton];
 	if( closeButton == NULL )
 		return -1;
@@ -360,7 +362,7 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWi
 	return FALSE;
 }
 
-bool isWindowFullScreen( NSWindow* nsWindow ) {
+static bool isWindowFullScreen( NSWindow* nsWindow ) {
 	return ((nsWindow.styleMask & NSWindowStyleMaskFullScreen) != 0);
 }
 

flatlaf-natives/flatlaf-natives-windows/build.gradle.kts

@@ -93,6 +93,15 @@ tasks {
 				into( nativesDir )
 				rename( "flatlaf-natives-windows.dll", libraryName )
 			}
+
+/*dump
+			val dumpbin = "C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.42.34433/bin/Hostx64/x64/dumpbin.exe"
+			val dll = linkedFile.asFile.get()
+			val dllDir = dll.parent
+			exec { commandLine( dumpbin, "/all", "/rawdata:none", "/out:$dllDir/objdump.txt", dll ) }
+			exec { commandLine( dumpbin, "/all", "/out:$dllDir/full-contents.txt", dll ) }
+			exec { commandLine( dumpbin, "/disasm", "/out:$dllDir/disassemble.txt", dll ) }
+dump*/
 		}
 	}
 }

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/FlatWndProc.cpp

@@ -30,6 +30,7 @@
  * @author Karl Tauber
  */
 
+// declare exported methods
 HWND getWindowHandle( JNIEnv* env, jobject window );
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinFileChooser.cpp

@@ -26,8 +26,8 @@
  * @since 3.6
  */
 
-// see FlatWndProc.cpp
-HWND getWindowHandle( JNIEnv* env, jobject window );
+// declare external methods
+extern HWND getWindowHandle( JNIEnv* env, jobject window );
 
 //---- class AutoReleasePtr ---------------------------------------------------
 
@@ -147,12 +147,12 @@ public:
 #define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_ ## option) != 0)
 #define CHECK_HRESULT( code ) { if( (code) != S_OK ) return NULL; }
 
-jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
+static jobjectArray newJavaStringArray( JNIEnv* env, jsize count ) {
 	jclass stringClass = env->FindClass( "java/lang/String" );
 	return env->NewObjectArray( count, stringClass, NULL );
 }
 
-jstring newJavaString( JNIEnv* env, LPWSTR str ) {
+static jstring newJavaString( JNIEnv* env, LPWSTR str ) {
 	return env->NewString( reinterpret_cast<jchar*>( str ), static_cast<jsize>( wcslen( str ) ) );
 }
 

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinWrapper.cpp

@@ -25,8 +25,8 @@
  * @author Karl Tauber
  */
 
-// see FlatWndProc.cpp
-HWND getWindowHandle( JNIEnv* env, jobject window );
+// declare external methods
+extern HWND getWindowHandle( JNIEnv* env, jobject window );
 
 //---- Utility ----------------------------------------------------------------