Macos headerless window (#96)

* check that drawing surface lock is successful

* add disable title bar

* bump skija

* make window handle accessible after `window.pack()` but before `window.setVisible(true)`

* rollback changes in demo App

* fix warning and return value in `lockDrawingSurface`

* reduce code duplication

skiko/gradle.properties

 kotlin.code.style=official
 deploy.version=0.0.0
 
-dependencies.skija.git.commit=adbb8c2926045af424a2ff93f5f0110f965bdbbb
-dependencies.skia.windows-x64=m89-109bfc9052/Skia-m89-109bfc9052-windows-Release-x64
-dependencies.skia.linux-x64=m89-109bfc9052/Skia-m89-109bfc9052-linux-Release-x64
-dependencies.skia.macos-x64=m89-109bfc9052/Skia-m89-109bfc9052-macos-Release-x64
-dependencies.skia.macos-arm64=m89-109bfc9052/Skia-m89-109bfc9052-macos-Release-arm64
+dependencies.skija.git.commit=a5d6dfd746b8a8ec2ef52ebea4baa53f299d080c
+dependencies.skia.windows-x64=m90-adbb69cd7f-2/Skia-m90-adbb69cd7f-2-windows-Release-x64
+dependencies.skia.linux-x64=m90-adbb69cd7f-2/Skia-m90-adbb69cd7f-2-linux-Release-x64
+dependencies.skia.macos-x64=m90-adbb69cd7f-2/Skia-m90-adbb69cd7f-2-macos-Release-x64
+dependencies.skia.macos-arm64=m90-adbb69cd7f-2/Skia-m90-adbb69cd7f-2-macos-Release-arm64
 
 # signer=Apple Distribution: Nikolay Igotti (N462MKSJ7M)

skiko/src/jvmMain/cpp/common/awt_jni.cc

@@ -36,10 +36,10 @@ extern "C"
         awt->FreeDrawingSurface(ds);
     }
 
-    JNIEXPORT void JNICALL Java_org_jetbrains_skiko_AWTKt_lockDrawingSurface(JNIEnv *env, jobject obj, jlong drawingSurfacePtr)
+    JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_AWTKt_lockDrawingSurface(JNIEnv *env, jobject obj, jlong drawingSurfacePtr)
     {
         JAWT_DrawingSurface *ds = fromJavaPointer<JAWT_DrawingSurface *>(drawingSurfacePtr);
-        ds->Lock(ds);
+        return (ds->Lock(ds) & JAWT_LOCK_ERROR) != 0;
     }
 
     JNIEXPORT void JNICALL Java_org_jetbrains_skiko_AWTKt_unlockDrawingSurface(JNIEnv *env, jobject obj, jlong drawingSurfacePtr)

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/AWT.kt

@@ -31,7 +31,7 @@ internal class DrawingSurface(
         }
         private set
 
-    fun lock() = lockDrawingSurface(ptr)
+    fun lock() = lockDrawingSurface(ptr).also { check(it == 0) }
 
     fun unlock() = unlockDrawingSurface(ptr)
 
@@ -74,7 +74,7 @@ private external fun getAWT(): Long
 private external fun getDrawingSurface(awt: Long, layer: Component): Long
 private external fun freeDrawingSurface(awt: Long, drawingSurface: Long)
 
-private external fun lockDrawingSurface(drawingSurface: Long)
+private external fun lockDrawingSurface(drawingSurface: Long): Int
 private external fun unlockDrawingSurface(drawingSurface: Long)
 
 private external fun getDrawingSurfaceInfo(drawingSurface: Long): Long

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/PlatformOperations.kt

@@ -14,6 +14,7 @@ import javax.swing.SwingUtilities
 internal interface PlatformOperations {
     fun isFullscreen(component: Component): Boolean
     fun setFullscreen(component: Component, value: Boolean)
+    fun disableTitleBar(platformInfo: Long)
     fun getDpiScale(component: Component): Float
     fun createRedrawer(layer: SkiaLayer, renderApi: GraphicsApi, properties: SkiaLayerProperties): Redrawer
 }
@@ -33,6 +34,10 @@ internal val platformOperations: PlatformOperations by lazy {
                     return component.graphicsConfiguration.defaultTransform.scaleX.toFloat()
                 }
 
+                override fun disableTitleBar(platformInfo: Long) {
+                    osxDisableTitleBar(platformInfo)
+                }
+
                 override fun createRedrawer(
                     layer: SkiaLayer,
                     renderApi: GraphicsApi,
@@ -57,6 +62,9 @@ internal val platformOperations: PlatformOperations by lazy {
                     device.setFullScreenWindow(if (value) window else null)
                 }
 
+                override fun disableTitleBar(platformInfo: Long) {
+                }
+
                 override fun getDpiScale(component: Component): Float {
                     return component.graphicsConfiguration.defaultTransform.scaleX.toFloat()
                 }
@@ -86,6 +94,9 @@ internal val platformOperations: PlatformOperations by lazy {
                     device.setFullScreenWindow(if (value) window else null)
                 }
 
+                override fun disableTitleBar(platformInfo: Long) {
+                }
+
                 override fun getDpiScale(component: Component): Float {
                     return component.graphicsConfiguration.defaultTransform.scaleX.toFloat()
                     // TODO doesn't work well because java doesn't scale windows (content has offset with 200% scale)
@@ -118,6 +129,7 @@ internal val platformOperations: PlatformOperations by lazy {
 // OSX
 external private fun osxIsFullscreenNative(component: Component): Boolean
 external private fun osxSetFullscreenNative(component: Component, value: Boolean)
+external private fun osxDisableTitleBar(platformInfo: Long)
 
 // Linux
 external private fun linuxGetDpiScaleNative(platformInfo: Long): Float

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/SkiaWindow.kt

@@ -15,4 +15,10 @@ open class SkiaWindow(
         layer.dispose()
         super.dispose()
     }
+
+    fun disableTitleBar() {
+        useDrawingSurfacePlatformInfo {
+            platformOperations.disableTitleBar(it)
+        }
+    }
 }

skiko/src/jvmMain/objectiveC/macos/Drawlayer.mm

@@ -104,6 +104,22 @@ NSWindow *findCALayerWindow(NSView *rootView, CALayer *layer) {
     return recursiveWindowSearch(rootView, layer);
 }
 
+NSWindow *findWindow(jlong platformInfoPtr)
+{
+    NSObject<JAWT_SurfaceLayers>* dsi_mac = (__bridge NSObject<JAWT_SurfaceLayers> *) platformInfoPtr;
+    CALayer* ca_layer = [dsi_mac windowLayer];
+
+    NSWindow* target_window = nil;
+
+    NSMutableArray<NSWindow *> *windows = [NSMutableArray arrayWithArray: [[NSApplication sharedApplication] windows]];
+    for (NSWindow* window in windows)
+    {
+        target_window = findCALayerWindow(window.contentView, ca_layer);
+        if (target_window != nil) break;
+    }
+    return target_window;
+}
+
 JNIEXPORT void JNICALL Java_org_jetbrains_skiko_HardwareLayer_nativeInit(JNIEnv *env, jobject canvas, jlong platformInfoPtr)
 {
     if (layerStorage == nil)
@@ -111,21 +127,12 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_HardwareLayer_nativeInit(JNIEnv
         layerStorage = [[NSMutableSet alloc] init];
     }
 
-    NSObject<JAWT_SurfaceLayers>* dsi_mac = (__bridge NSObject<JAWT_SurfaceLayers> *) platformInfoPtr;
-
     LayerHandler *layersSet = [[LayerHandler alloc] init];
-
+    NSObject<JAWT_SurfaceLayers>* dsi_mac = (__bridge NSObject<JAWT_SurfaceLayers> *) platformInfoPtr;
     layersSet.container = [dsi_mac windowLayer];
     jobject canvasGlobalRef = env->NewGlobalRef(canvas);
     [layersSet setCanvasGlobalRef: canvasGlobalRef];
-
-    NSMutableArray<NSWindow *> *windows = [NSMutableArray arrayWithArray: [[NSApplication sharedApplication] windows]];
-    for (NSWindow* window in windows) {
-        layersSet.window = findCALayerWindow(window.contentView, layersSet.container);
-        if (layersSet.window != nil) {
-            break;
-        }
-    }
+    layersSet.window = findWindow(platformInfoPtr);
 
     [layerStorage addObject: layersSet];
 }
@@ -141,16 +148,6 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_HardwareLayer_nativeDispose(JNIE
     }
 }
 
-JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_HardwareLayer_getWindowHandle(JNIEnv *env, jobject canvas)
-{
-    LayerHandler *layer = findByObject(env, canvas);
-    if (layer != NULL)
-    {
-        return (jlong)[layer window];
-    }
-    return (jlong)kNullWindowHandle;
-}
-
 JNIEXPORT jboolean JNICALL Java_org_jetbrains_skiko_PlatformOperationsKt_osxIsFullscreenNative(JNIEnv *env, jobject properties, jobject component)
 {
     LayerHandler *layer = findByObject(env, component);
@@ -170,6 +167,26 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_PlatformOperationsKt_osxSetFulls
     }
 }
 
+JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_HardwareLayer_getWindowHandle(JNIEnv *env, jobject canvas, jlong platformInfoPtr)
+{
+    NSWindow* window = findWindow(platformInfoPtr);
+    return (jlong)window;
+}
+
+JNIEXPORT void JNICALL Java_org_jetbrains_skiko_PlatformOperationsKt_osxDisableTitleBar(JNIEnv *env, jobject properties, jlong platformInfoPtr)
+{
+    NSWindow* window = findWindow(platformInfoPtr);
+    if (window == nil) return;
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [window setTitlebarAppearsTransparent:YES];
+        [window setTitleVisibility:NSWindowTitleHidden];
+        [window setStyleMask:[window styleMask]|NSWindowStyleMaskFullSizeContentView];
+        // always show `fullscreen` green traffic light button instead of `maximize/zoom` button
+        [window setCollectionBehavior:[window collectionBehavior]|NSWindowCollectionBehaviorFullScreenPrimary];
+        [window setMovable:NO];
+    });
+}
+
 void getMetalDeviceAndQueue(void** device, void** queue)
 {
     id<MTLDevice> fDevice = MTLCreateSystemDefaultDevice();