Native window decorations: avoid using C-runtime, which reduces the DLL size from 100kb to 8kb

.gitignore

@@ -9,3 +9,5 @@ out/
 *.iml
 *.ipr
 *.iws
+.vs/
+.vscode/

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

@@ -55,7 +55,7 @@ library {
 				compilerArgs.addAll( toolChain.map {
 					when( it ) {
 						is Gcc, is Clang -> listOf( "-O2" )
-						is VisualCpp -> listOf( "/O2" )
+						is VisualCpp -> listOf( "/O2", "/Zl", "/GS-" )
 						else -> emptyList()
 					}
 				} )
@@ -70,8 +70,8 @@ library {
 				val jawt = "${org.gradle.internal.jvm.Jvm.current().javaHome}/lib/jawt"
 				linkerArgs.addAll( toolChain.map {
 					when( it ) {
-						is Gcc, is Clang -> listOf( "-l${jawt}", "-lUser32", "-lshell32", "-lAdvAPI32" )
+						is Gcc, is Clang -> listOf( "-l${jawt}", "-lUser32", "-lshell32", "-lAdvAPI32", "-lKernel32" )
-						is VisualCpp -> listOf( "${jawt}.lib", "User32.lib", "shell32.lib", "AdvAPI32.lib" )
+						is VisualCpp -> listOf( "${jawt}.lib", "User32.lib", "shell32.lib", "AdvAPI32.lib", "Kernel32.lib", "/NODEFAULTLIB" )
 						else -> emptyList()
 					}
 				} )

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

@@ -14,12 +14,14 @@
  * limitations under the License.
  */
 
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
 #include <windows.h>
 #include <windowsx.h>
 #include <shellapi.h>
 #include <jawt.h>
 #include <jawt_md.h>
-#include <map>
 #include "FlatWndProc.h"
 #include "com_formdev_flatlaf_ui_FlatWindowsNativeWindowBorder_WndProc.h"
 
@@ -50,7 +52,7 @@ jmethodID FlatWndProc::onNcHitTestMID;
 jmethodID FlatWndProc::isFullscreenMID;
 jmethodID FlatWndProc::fireStateChangedLaterOnceMID;
 
-std::map<HWND, FlatWndProc*> FlatWndProc::hwndMap = std::map<HWND, FlatWndProc*>();
+HWNDMap* FlatWndProc::hwndMap;
 
 //---- class FlatWndProc methods ----------------------------------------------
 
@@ -68,16 +70,20 @@ HWND FlatWndProc::install( JNIEnv *env, jobject obj, jobject window ) {
 	if( initialized < 0 )
 		return 0;
 
+	// create HWND map
+	if( hwndMap == NULL )
+		hwndMap = new HWNDMap();
+
 	// get window handle
 	HWND hwnd = getWindowHandle( env, window );
-	if( hwnd == NULL || hwndMap.count( hwnd ) > 0 )
+	if( hwnd == NULL || hwndMap->get( hwnd ) != NULL )
 		return 0;
 
 	FlatWndProc* fwp = new FlatWndProc();
 	env->GetJavaVM( &fwp->jvm );
 	fwp->obj = env->NewGlobalRef( obj );
 	fwp->hwnd = hwnd;
-	hwndMap[hwnd] = fwp;
+	hwndMap->put( hwnd, fwp );
 
 	// replace window procedure
 	fwp->defaultWndProc = reinterpret_cast<WNDPROC>(
@@ -90,11 +96,14 @@ HWND FlatWndProc::install( JNIEnv *env, jobject obj, jobject window ) {
 }
 
 void FlatWndProc::uninstall( JNIEnv *env, jobject obj, HWND hwnd ) {
-    if( hwnd == NULL || hwndMap.count( hwnd ) == 0 )
+	if( hwnd == NULL )
 		return;
 
-    FlatWndProc* fwp = hwndMap[hwnd];
+	FlatWndProc* fwp = (FlatWndProc*) hwndMap->get( hwnd );
-	hwndMap.erase( hwnd );
+	if( fwp == NULL )
+		return;
+
+	hwndMap->remove( hwnd );
 
 	// restore original window procedure
 	::SetWindowLongPtr( hwnd, GWLP_WNDPROC, (LONG_PTR) fwp->defaultWndProc );
@@ -132,7 +141,7 @@ void FlatWndProc::updateFrame() {
 }
 
 LRESULT CALLBACK FlatWndProc::StaticWindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) {
-	FlatWndProc* fwp = hwndMap[hwnd];
+	FlatWndProc* fwp = (FlatWndProc*) hwndMap->get( hwnd );
 	return fwp->WindowProc( hwnd, uMsg, wParam, lParam );
 }
 
@@ -175,7 +184,7 @@ LRESULT FlatWndProc::WmDestroy( HWND hwnd, int uMsg, WPARAM wParam, LPARAM lPara
 
 	// cleanup
 	getEnv()->DeleteGlobalRef( obj );
-	hwndMap.erase( hwnd );
+	hwndMap->remove( hwnd );
 	delete this;
 
 	// call original AWT window procedure because it may fire window closed event in AwtWindow::WmDestroy()

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

@@ -15,6 +15,7 @@
  */
 
 #include <windows.h>
+#include "HWNDMap.h"
 
 /**
  * @author Karl Tauber
@@ -31,7 +32,7 @@ private:
 	static jmethodID isFullscreenMID;
 	static jmethodID fireStateChangedLaterOnceMID;
 
-	static std::map<HWND, FlatWndProc*> hwndMap;
+	static HWNDMap* hwndMap;
 
 	JavaVM* jvm;
 	JNIEnv* env; // attached to AWT-Windows/Win32 thread

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

@@ -0,0 +1,153 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <stdio.h>
+#include "HWNDMap.h"
+
+#define DEFAULT_CAPACITY		20
+#define INCREASE_CAPACITY		10
+
+/**
+ * @author Karl Tauber
+ */
+
+class LOCK {
+	LPCRITICAL_SECTION lpCriticalSection;
+
+public:
+	LOCK( LPCRITICAL_SECTION lpCriticalSection ) {
+		this->lpCriticalSection = lpCriticalSection;
+		::EnterCriticalSection( lpCriticalSection );
+	}
+	~LOCK() {
+		::LeaveCriticalSection( lpCriticalSection );
+	}
+};
+
+
+HWNDMap::HWNDMap() {
+	size = 0;
+	capacity = DEFAULT_CAPACITY;
+	table = new Entry[capacity];
+
+	::InitializeCriticalSection( &criticalSection );
+
+//	dump( "<init>" );
+}
+
+LPVOID HWNDMap::get( HWND key ) {
+	LOCK lock( &criticalSection );
+
+	int index = binarySearch( key );
+	return (index >= 0) ? table[index].value : NULL;
+}
+
+void HWNDMap::put( HWND key, LPVOID value ) {
+	LOCK lock( &criticalSection );
+
+	int index = binarySearch( key );
+//	printf( "put %p %p = %d --\n", key, value, index );
+	if( index >= 0 ) {
+		// key already in map --> replace
+		table[index].value = value;
+	} else {
+		// insert new key
+		ensureCapacity( size + 1 );
+
+		// make roor for new entry
+		index = -(index + 1);
+		for( int i = size - 1; i >= index; i-- )
+			table[i + 1] = table[i];
+		size++;
+
+		// insert entry
+		table[index].key = key;
+		table[index].value = value;
+	}
+
+//	dump( "put" );
+}
+
+void HWNDMap::remove( HWND key ) {
+	LOCK lock( &criticalSection );
+
+	// search for key
+	int index = binarySearch( key );
+//	printf( "remove %p = %d --\n", key, index );
+	if( index < 0 )
+		return;
+
+	// remove entry
+	for( int i = index + 1; i < size; i++ )
+		table[i - 1] = table[i];
+	size--;
+
+//	dump( "remove" );
+}
+
+int HWNDMap::binarySearch( HWND key ) {
+	int low = 0;
+	int high = size - 1;
+
+	while( low <= high ) {
+		int mid = (low + high) >> 1;
+
+		HWND midKey = table[mid].key;
+		int cmp = midKey - key;
+		if( cmp < 0 )
+			low = mid + 1;
+		else if( cmp > 0 )
+			high = mid - 1;
+		else
+			return mid;
+	}
+
+	return -(low + 1);
+}
+
+void HWNDMap::ensureCapacity( int minCapacity ) {
+	if( minCapacity <= capacity )
+		return;
+
+	// allocate new table
+	int newCapacity = minCapacity + INCREASE_CAPACITY;
+	Entry* newTable = new Entry[newCapacity];
+
+	// copy old table to new table
+	for( int i = 0; i < capacity; i++ )
+		newTable[i] = table[i];
+
+	// delete old table
+	delete table;
+
+	table = newTable;
+	capacity = newCapacity;
+}
+
+/*
+void HWNDMap::dump( char* msg ) {
+	printf( "---- %s -----------------------\n", msg );
+	printf( "size     %d\n", size );
+	printf( "capacity %d\n", capacity );
+	printf( "table    %p\n", table );
+
+	for( int i = 0; i < capacity; i++ )
+		printf( "  %d: %p - %p  %s\n", i, table[i].key, table[i].value, i >= size ? "UNUSED" : "" );
+}
+*/

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <windows.h>
+
+/**
+ * A simple map that uses a sorted array to store key/value pairs.
+ * 
+ * @author Karl Tauber
+ */
+
+struct Entry
+{
+	HWND key;
+	LPVOID value;
+};
+
+class HWNDMap
+{
+private:
+	int size; // used entries in table
+	int capacity; // total size of table
+	Entry* table;
+
+	// used to synchronize to make it thread safe
+	CRITICAL_SECTION criticalSection;
+
+public:
+	HWNDMap();
+
+	LPVOID get( HWND key );
+	void put( HWND key, LPVOID value );
+	void remove( HWND key );
+
+private:
+	int binarySearch( HWND key );
+	void ensureCapacity( int newCapacity );
+
+//	void dump( char* msg );
+};

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

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include <windows.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+/**
+ * Methods that replace C-runtime methods and allow linking/running without C-runtime.
+ * 
+ * WARNING: Constructors/destructors of static objects are not invoked!
+ *
+ * https://documentation.help/Far-Manager/msdnmag-issues-01-01-hood-default.aspx.html
+ * www.catch22.net/tuts/win32/reducing-executable-size#the-c-runtime-and-default-libraries
+ * https://www.mvps.org/user32/nocrt.html
+ * 
+ * see also LIBCTINY on "Downloads" page here: http://www.wheaty.net/
+ * or https://github.com/leepa/libctiny
+ * 
+ * @author Karl Tauber
+ */
+
+extern "C"
+BOOL WINAPI _DllMainCRTStartup( HINSTANCE instance, DWORD reason, LPVOID reserved ) {
+	return TRUE;
+}
+
+void* __cdecl operator new( size_t cb ) {
+	return ::HeapAlloc( ::GetProcessHeap(), HEAP_ZERO_MEMORY, cb );
+}
+
+void* __cdecl operator new[]( size_t cb ) {
+	return ::HeapAlloc( ::GetProcessHeap(), HEAP_ZERO_MEMORY, cb );
+}
+
+void __cdecl operator delete( void* pv, size_t cb ) {
+	if( pv != NULL )
+		::HeapFree( ::GetProcessHeap(), 0, pv );
+}
+
+/*
+extern "C"
+int __cdecl printf( const char* format, ... ) {
+	char szBuff[1024];
+	int retValue;
+	DWORD cbWritten;
+	va_list argptr;
+
+	va_start( argptr, format );
+	retValue = wvsprintfA( szBuff, format, argptr );
+	va_end( argptr );
+
+	WriteFile( GetStdHandle( STD_OUTPUT_HANDLE ), szBuff, retValue, &cbWritten, NULL );
+
+	return retValue;
+}
+*/