implement WindowManager for composeUI popups

currently everything is created as GtkPopover which is not ideal for
toplevel windows, so print a warning in that case.

meson.build

@@ -128,6 +128,7 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
                                                                   	'src/api-impl-jni/views/AndroidLayout.c',
                                                                   	'src/api-impl-jni/views/android_view_View.c',
                                                                   	'src/api-impl-jni/views/android_view_ViewGroup.c',
+                                                                  	'src/api-impl-jni/views/android_view_WindowManagerImpl.c',
                                                                   	'src/api-impl-jni/widgets/WrapperWidget.c',
                                                                   	'src/api-impl-jni/widgets/android_view_SurfaceView.c',
                                                                   	'src/api-impl-jni/widgets/android_webkit_WebView.c',

src/api-impl-jni/generated_headers/android_view_WindowManagerImpl.h

@@ -0,0 +1,37 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class android_view_WindowManagerImpl */
+
+#ifndef _Included_android_view_WindowManagerImpl
+#define _Included_android_view_WindowManagerImpl
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     android_view_WindowManagerImpl
+ * Method:    native_addView
+ * Signature: (JIIIII)V
+ */
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1addView
+  (JNIEnv *, jclass, jlong, jint, jint, jint, jint, jint);
+
+/*
+ * Class:     android_view_WindowManagerImpl
+ * Method:    native_updateViewLayout
+ * Signature: (JIIII)V
+ */
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1updateViewLayout
+  (JNIEnv *, jclass, jlong, jint, jint, jint, jint);
+
+/*
+ * Class:     android_view_WindowManagerImpl
+ * Method:    native_removeView
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1removeView
+  (JNIEnv *, jclass, jlong);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

src/api-impl-jni/views/android_view_WindowManagerImpl.c

@@ -0,0 +1,45 @@
+#include <gtk/gtk.h>
+
+#include "../defines.h"
+#include "gdk/gdk.h"
+#include "glib-object.h"
+#include "../generated_headers/android_view_WindowManagerImpl.h"
+
+#define FIRST_SUB_WINDOW 1000
+#define LAST_SUB_WINDOW 1999
+
+extern GtkWindow *window;
+
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1addView(JNIEnv *env, jclass clazz, jlong widget_ptr, jint type, jint x, jint y, jint width, jint height)
+{
+	GtkWidget *widget = _PTR(widget_ptr);
+	if (type < FIRST_SUB_WINDOW || type > LAST_SUB_WINDOW) {
+		// TODO: handle toplevel windows properly
+		printf("WARNING: non subwindow types not implemented properly in WindowManagerImpl\n");
+	}
+	GtkPopover *popover = GTK_POPOVER(g_object_ref(gtk_popover_new()));
+	gtk_popover_set_child(popover, gtk_widget_get_parent(widget));
+	printf("::: x=%d, y=%d, width=%d, height=%d\n", x, y, width, height);
+	gtk_popover_set_autohide(popover, FALSE);
+	gtk_popover_set_pointing_to(popover, &(GdkRectangle){.x=x, .y=y});
+	gtk_widget_insert_before(GTK_WIDGET(popover), gtk_window_get_child(window), NULL);
+	gtk_popover_present(popover);
+	gtk_popover_popup(popover);
+	gtk_widget_queue_allocate(gtk_widget_get_parent(gtk_window_get_child(window)));
+}
+
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1updateViewLayout(JNIEnv *env, jclass clazz, jlong widget_ptr, jint x, jint y, jint width, jint height)
+{
+	GtkPopover *popover = GTK_POPOVER(gtk_widget_get_parent(gtk_widget_get_parent(gtk_widget_get_parent(GTK_WIDGET(_PTR(widget_ptr))))));
+	printf("updateViewLayout::: x=%d, y=%d, width=%d, height=%d\n", x, y, width, height);
+	gtk_popover_set_pointing_to(popover, &(GdkRectangle){.x=x, .y=y});
+}
+
+JNIEXPORT void JNICALL Java_android_view_WindowManagerImpl_native_1removeView(JNIEnv *env, jclass clazz, jlong widget_ptr)
+{
+	GtkPopover *popover = GTK_POPOVER(gtk_widget_get_parent(gtk_widget_get_parent(gtk_widget_get_parent(GTK_WIDGET(_PTR(widget_ptr))))));
+	gtk_popover_popdown(popover);
+	gtk_widget_unparent(GTK_WIDGET(popover));
+	gtk_popover_set_child(popover, NULL);
+	g_object_unref(popover);
+}

src/api-impl/android/view/WindowManager.java

@@ -5,6 +5,8 @@ import android.os.IBinder;
 public interface WindowManager {
 	public android.view.Display getDefaultDisplay();
 
+	public void removeViewImmediate(View view);
+
 	public class LayoutParams extends ViewGroup.LayoutParams {
 		public static final int FLAG_KEEP_SCREEN_ON = 0;
 		public static final int FLAG_DIM_BEHIND = 2;

src/api-impl/android/view/WindowManagerImpl.java

@@ -8,16 +8,31 @@ public class WindowManagerImpl implements WindowManager, ViewManager {
 	@Override
 	public void addView(View view, android.view.ViewGroup.LayoutParams params) {
 		System.out.println("WindowManagerImpl.addView(" + view + ", " + params + ") called");
+		view.setLayoutParams(params);
+		view.onAttachedToWindow();
+		WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams)params;
+		native_addView(view.widget, windowParams.type, windowParams.x, windowParams.y, params.width, params.height);
 	}
 
 	@Override
 	public void updateViewLayout(View view, android.view.ViewGroup.LayoutParams params) {
 		System.out.println("WindowManagerImpl.updateViewLayout(" + view + ", " + params + ") called");
+		WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams)params;
+		view.setLayoutParams(params);
+		native_updateViewLayout(view.widget, windowParams.x, windowParams.y, params.width, params.height);
 	}
 
 	@Override
 	public void removeView(View view) {
-		// TODO Auto-generated method stub
+		native_removeView(view.widget);
-		throw new UnsupportedOperationException("Unimplemented method 'removeView'");
 	}
+
+	@Override
+	public void removeViewImmediate(View view) {
+		removeView(view);
+	}
+
+	private static native void native_addView(long widget, int type, int x, int y, int width, int height);
+	private static native void native_updateViewLayout(long widget, int x, int y, int width, int height);
+	private static native void native_removeView(long widget);
 }