Destroy client's windows on disconnect

This makes sure client's windows are removed from the root window and
all of the destroy events are sent.

xbanan/Base.cpp

@@ -374,6 +374,9 @@ void invalidate_window(WINDOW wid, int32_t x, int32_t y, int32_t w, int32_t h)
 
 	for (;;)
 	{
+		if (wid == g_root.windowId)
+			return;
+
 		auto& object = *g_objects[wid];
 		ASSERT(object.type == Object::Type::Window);
 
@@ -506,17 +509,26 @@ transitient_for_done:
 
 static BAN::ErrorOr<void> map_window(Client& client_info, WINDOW wid)
 {
+	static const CARD32 WM_CLASS = g_atoms_name_to_id["WM_CLASS"_sv];
+
 	auto& object = *g_objects[wid];
 	ASSERT(object.type == Object::Type::Window);
 
 	auto& window = object.object.get<Object::Window>();
 	if (window.mapped)
 		return {};
+	window.mapped = true;
 
 	if (window.parent == g_root.windowId)
 	{
 		ASSERT(!window.platform_window);
 
+		// NOTE: This is not perfect but seems to work.
+		//       This is used to not display "dummy" event windows
+		//       that should not be visible.
+		if (!window.properties.contains(WM_CLASS))
+			return {};
+
 		auto info = get_plaform_window_info(window);
 		window.platform_window = TRY(g_platform_ops.create_window(
 			info.transient_for,
@@ -529,8 +541,6 @@ static BAN::ErrorOr<void> map_window(Client& client_info, WINDOW wid)
 		));
 	}
 
-	window.mapped = true;
-
 	for (auto& pixel : window.pixels)
 		pixel = window.background;
 	invalidate_window(wid, 0, 0, window.width, window.height);
@@ -715,7 +725,7 @@ static PlatformWindow* get_platform_window(const Object::Window& window)
 {
 	if (window.platform_window)
 		return const_cast<PlatformWindow*>(window.platform_window.ptr());
-	if (window.parent == g_root.windowId)
+	if (window.parent == None)
 		return nullptr;
 
 	auto& object = *g_objects[window.parent];
@@ -728,30 +738,28 @@ void update_cursor(WINDOW wid, int32_t x, int32_t y)
 	if (g_platform_ops.set_cursor == nullptr)
 		return;
 
-	const auto child_wid = find_child_window(wid, x, y);
-	if (child_wid == None)
+	wid = find_child_window(wid, x, y);
+	if (wid == None)
 		return;
 
-	CURSOR cursor = None;
-
-	if (child_wid != None)
+	const CURSOR cid = [&wid]() -> CURSOR {
+		for (;;)
 		{
-		auto& object = *g_objects[child_wid];
-		ASSERT(object.type == Object::Type::Window);
-		cursor = object.object.get<Object::Window>().cursor;
+			const auto& window = g_objects[wid]->object.get<Object::Window>();
+			if (window.cursor != None || window.parent == None)
+				return window.cursor;
+			wid = window.parent;
 		}
+	}();
 
-	static CURSOR active_cursor = None;
-	if (cursor == active_cursor)
+	static CURSOR active_cid = None;
+	if (cid == active_cid)
 		return;
 
-	auto& object = *g_objects[wid];
-	ASSERT(object.type == Object::Type::Window);
-	auto& window = object.object.get<Object::Window>();
+	const auto& window = g_objects[wid]->object.get<Object::Window>();
+	g_platform_ops.set_cursor(get_platform_window(window), get_cursor_safe(cid));
 
-	g_platform_ops.set_cursor(get_platform_window(window), get_cursor_safe(cursor));
-
-	active_cursor = window.cursor;
+	active_cid = cid;
 }
 
 static void on_root_client_message(const xEvent& event)
@@ -1010,9 +1018,11 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 			}
 
 			if (cursor_id.has_value())
+			{
 				window.cursor = cursor_id.value();
 				if (window.hovered)
 					update_cursor(request.window, window.cursor_x, window.cursor_y);
+			}
 
 			if (background.has_value())
 				window.background = background.value();
@@ -1932,12 +1942,15 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 
 			const auto& window = TRY_REF(get_window(client_info, wid, opcode));
 
-			int32_t root_x, root_y;
-			int32_t event_x, event_y;
-			root_x = event_x = window.cursor_x;
-			root_y = event_y = window.cursor_y;
-
-			const auto child_wid = find_child_window(wid, event_x, event_y);
+			WINDOW child_wid { None };
+			for (auto wid_ : window.children)
+			{
+				const auto& child_window = g_objects[wid_]->object.get<Object::Window>();
+				if (!child_window.hovered)
+					continue;
+				child_wid = wid_;
+				break;
+			}
 
 			xQueryPointerReply reply {
 				.type = X_Reply,
@@ -1945,11 +1958,11 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 				.sequenceNumber = client_info.sequence,
 				.length = 0,
 				.root = g_root.windowId,
-				.child = static_cast<CARD32>(child_wid == wid ? None : child_wid),
-				.rootX = static_cast<INT16>(root_x),
-				.rootY = static_cast<INT16>(root_y),
-				.winX = static_cast<INT16>(event_x),
-				.winY = static_cast<INT16>(event_y),
+				.child = static_cast<CARD32>(child_wid),
+				.rootX = static_cast<INT16>(window.cursor_x), // FIXME
+				.rootY = static_cast<INT16>(window.cursor_y), // FIXME
+				.winX = static_cast<INT16>(window.cursor_x),
+				.winY = static_cast<INT16>(window.cursor_y),
 				.mask = static_cast<KeyButMask>(g_keymask | g_butmask),
 			};
 			TRY(encode(client_info.output_buffer, reply));
@@ -2052,8 +2065,7 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 						.depth = request.depth,
 						.width = request.width,
 						.height = request.height,
-						.data = data.span(),
-						.owned_data = BAN::move(data),
+						.data = BAN::move(data),
 					}
 				}))
 			));
@@ -2697,7 +2709,7 @@ BAN::ErrorOr<void> handle_packet(Client& client_info, BAN::ConstByteSpan packet)
 		{
 			auto request = decode<xQueryBestSizeReq>(packet).value();
 
-			dprintln("FreeCursor");
+			dprintln("QueryBestSize");
 			dprintln("  class:    {}", request.c_class);
 			dprintln("  drawable: {}", request.drawable);
 			dprintln("  width:    {}", request.width);

xbanan/Definitions.h

@@ -81,8 +81,7 @@ struct Object
 		CARD8 depth;
 		CARD32 width;
 		CARD32 height;
-		BAN::ByteSpan data;
-		BAN::Vector<uint8_t> owned_data;
+		BAN::Vector<uint8_t> data;
 	};
 
 	struct GraphicsContext

xbanan/Events.cpp

@@ -1,8 +1,6 @@
 #include "Base.h"
 #include "Definitions.h"
 #include "Keymap.h"
-#include "Platform.h"
-#include "SafeGetters.h"
 #include "Utils.h"
 
 #include <X11/X.h>
@@ -451,14 +449,26 @@ static void send_enter_and_leave_events(WINDOW old_wid, int32_t old_x, int32_t o
 		MUST(window.send_event(event, EnterWindowMask));
 	}
 
-	const auto set_last_entry_hovered = [](const BAN::Vector<WINDOW>& path, bool value) {
-		if (path.empty())
-			return;
-		g_objects[path.back()]->object.get<Object::Window>().hovered = value;
-	};
+	for (const auto wid : old_child_path)
+		g_objects[wid]->object.get<Object::Window>().hovered = false;
+	for (const auto wid : new_child_path)
+		g_objects[wid]->object.get<Object::Window>().hovered = true;
+}
 
-	set_last_entry_hovered(old_child_path, false);
-	set_last_entry_hovered(new_child_path, true);
+static WINDOW s_current_top_level_window = None;
+
+void on_window_leave_event(WINDOW wid)
+{
+	if (s_current_top_level_window != wid)
+		return;
+
+	auto& object = *g_objects[wid];
+	ASSERT(object.type == Object::Type::Window);
+	auto& window = object.object.get<Object::Window>();
+
+	send_enter_and_leave_events(wid, window.cursor_x, window.cursor_y, wid, -1, -1);
+
+	s_current_top_level_window = None;
 }
 
 void on_mouse_move_event(WINDOW wid, int32_t x, int32_t y)
@@ -469,21 +479,17 @@ void on_mouse_move_event(WINDOW wid, int32_t x, int32_t y)
 
 	update_cursor(wid, x, y);
 
+	if (auto it = g_objects.find(s_current_top_level_window); it == g_objects.end())
+		send_enter_and_leave_events(wid, -1, -1, wid, x, y);
+	else
 	{
-		static WINDOW old_wid = g_root.windowId;
-
-		auto it = g_objects.find(old_wid);
-		if (it == g_objects.end())
-			it = g_objects.find(g_root.windowId);
-
 		ASSERT(it->value->type == Object::Type::Window);
 		auto& old_window = it->value->object.get<Object::Window>();
-
-		send_enter_and_leave_events(old_wid, old_window.cursor_x, old_window.cursor_y, wid, x, y);
-
-		old_wid = wid;
+		send_enter_and_leave_events(s_current_top_level_window, old_window.cursor_x, old_window.cursor_y, wid, x, y);
 	}
 
+	s_current_top_level_window = wid;
+
 	update_cursor_position_recursive(wid, x, y);
 
 	// TODO: optimize with PointerMotionHint

xbanan/Events.h

@@ -9,6 +9,7 @@ void on_window_close_event(WINDOW wid);
 void on_window_resize_event(WINDOW wid, uint32_t width, uint32_t height);
 void on_window_focus_event(WINDOW wid, bool focused);
 void on_window_fullscreen_event(WINDOW wid, bool is_fullscreen);
+void on_window_leave_event(WINDOW wid);
 
 void on_mouse_move_event(WINDOW wid, int32_t x, int32_t y);
 void on_mouse_button_event(WINDOW wid, uint8_t xbutton, bool pressed);

xbanan/ExtSHM.cpp

@@ -7,42 +7,13 @@
 #include <X11/X.h>
 #include <X11/extensions/shmproto.h>
 
-#include <netinet/in.h>
 #include <sys/shm.h>
-#include <sys/socket.h>
 #include <unistd.h>
 
 static BYTE s_shm_event_base;
 static BYTE s_shm_error_base;
 static BYTE s_shm_major_opcode;
 
-static bool is_local_socket(int socket)
-{
-	sockaddr_storage addr;
-	socklen_t addr_len = sizeof(addr);
-	if (getpeername(socket, reinterpret_cast<sockaddr*>(&addr), &addr_len) == -1)
-		return false;
-
-	switch (addr.ss_family)
-	{
-		case AF_UNIX:
-			return true;
-		case AF_INET:
-		{
-			const auto* addr_in = reinterpret_cast<const sockaddr_in*>(&addr);
-			const auto ipv4 = ntohl(addr_in->sin_addr.s_addr);
-			return (ipv4 & IN_CLASSA_NET) == IN_LOOPBACKNET;
-		}
-		case AF_INET6:
-		{
-			const auto* addr_in6 = reinterpret_cast<const sockaddr_in6*>(&addr);
-			return IN6_IS_ADDR_LOOPBACK(&addr_in6->sin6_addr);
-		}
-	}
-
-	return false;
-}
-
 static BAN::ErrorOr<void*> get_shmseg(Client& client_info, CARD32 shmseg, BYTE op_major, BYTE op_minor)
 {
 	auto it = g_objects.find(shmseg);
@@ -74,11 +45,11 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 	{
 		case X_ShmQueryVersion:
 		{
-			dwarnln("ShmQueryVersion");
+			dprintln("ShmQueryVersion");
 
 			xShmQueryVersionReply reply {
 				.type = X_Reply,
-				.sharedPixmaps = is_local_socket(client_info.fd),
+				.sharedPixmaps = false,
 				.sequenceNumber = client_info.sequence,
 				.length = 0,
 				.majorVersion = 1,
@@ -95,7 +66,7 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 		{
 			auto request = decode<xShmAttachReq>(packet).value();
 
-			dwarnln("ShmAttach");
+			dprintln("ShmAttach");
 			dprintln("  shmseg:   {}", request.shmseg);
 			dprintln("  shmid:    {}", request.shmid);
 			dprintln("  readOnly: {}", request.readOnly);
@@ -144,7 +115,7 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 		{
 			auto request = decode<xShmDetachReq>(packet).value();
 
-			dwarnln("ShmDetach");
+			dprintln("ShmDetach");
 			dprintln("  shmseg:   {}", request.shmseg);
 
 			void* shm_segment = TRY(get_shmseg(client_info, request.shmseg, op_major, op_minor));
@@ -159,7 +130,7 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 		{
 			auto request = decode<xShmPutImageReq>(packet).value();
 
-			dwarnln("ShmPutImage");
+			dprintln("ShmPutImage");
 			dprintln("  drawable:    {}", request.drawable);
 			dprintln("  gc:          {}", request.gc);
 			dprintln("  totalWidth:  {}", request.totalWidth);
@@ -223,7 +194,7 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 		{
 			auto request = decode<xShmGetImageReq>(packet).value();
 
-			dwarnln("ShmGetImage");
+			dprintln("ShmGetImage");
 			dprintln("  drawable:  {}", request.drawable);
 			dprintln("  x:         {}", request.x);
 			dprintln("  y:         {}", request.y);
@@ -265,44 +236,6 @@ static BAN::ErrorOr<void> extension_shm(Client& client_info, BAN::ConstByteSpan
 
 			break;
 		}
-		case X_ShmCreatePixmap:
-		{
-			auto request = decode<xShmCreatePixmapReq>(packet).value();
-
-			dwarnln("ShmCreatePixmap");
-			dprintln("  depth:    {}", request.depth);
-			dprintln("  pid:      {}", request.pid);
-			dprintln("  drawable: {}", request.drawable);
-			dprintln("  width:    {}", request.width);
-			dprintln("  height:   {}", request.height);
-			dprintln("  shmseg:   {}", request.shmseg);
-			dprintln("  offset:   {}", request.offset);
-
-			uint8_t bpp = 0;
-			for (auto format : g_formats)
-				if (format.depth == request.depth)
-					bpp = format.bitsPerPixel;
-			ASSERT(bpp == 32);
-
-			void* shm_segment = TRY(get_shmseg(client_info, request.shmseg, op_major, op_minor));
-
-			TRY(client_info.objects.insert(request.pid));
-			TRY(g_objects.insert(
-				request.pid,
-				TRY(BAN::UniqPtr<Object>::create(Object {
-					.type = Object::Type::Pixmap,
-					.object = Object::Pixmap {
-						.depth = request.depth,
-						.width = request.width,
-						.height = request.height,
-						.data = BAN::ByteSpan(static_cast<uint8_t*>(shm_segment) + request.offset, request.width * request.height * 4),
-						.owned_data = {},
-					}
-				}))
-			));
-
-			break;
-		}
 		default:
 			dwarnln("unsupported shm minor opcode {}", packet[1]);
 			break;

xbanan/Image.cpp

@@ -60,8 +60,33 @@ void put_image(const PutImageInfo& info)
 		}
 		case ZPixmap:
 		{
+			bool needs_clipping = true;
+
+			if (info.gc.clip_mask == None)
+			{
+				needs_clipping = false;
+			}
+			else if (info.gc.clip_mask == UINT32_MAX)
+			{
+				const uint32_t clip_min_x = min_x - info.gc.clip_origin_x;
+				const uint32_t clip_min_y = min_y - info.gc.clip_origin_y;
+
+				const uint32_t clip_max_x = max_x - info.gc.clip_origin_x;
+				const uint32_t clip_max_y = max_y - info.gc.clip_origin_y;
+
+				for (const auto& rect : info.gc.clip_rects)
+				{
+					if (clip_min_x < rect.x || clip_max_x > rect.x + rect.width)
+						continue;
+					if (clip_min_y < rect.y || clip_max_y > rect.y + rect.height)
+						continue;
+					needs_clipping = false;
+					break;
+				}
+			}
+
 			ASSERT(info.left_pad == 0);
-			if (in_bpp == 32 && info.gc.clip_mask == None)
+			if (in_bpp == 32 && !needs_clipping)
 			{
 				const auto bytes_per_row = (max_x - min_x) * 4;
 				for (int32_t y = min_y; y < max_y; y++)

xbanan/SDL2/sdl2.cpp

@@ -115,7 +115,7 @@ static BAN::ErrorOr<BAN::UniqPtr<PlatformWindow>> sdl2_create_window(PlatformWin
 	window->width = width;
 	window->height = height;
 
-	if (parent == nullptr || type != WindowType::Popup)
+	if (parent == nullptr)
 		x = y = SDL_WINDOWPOS_UNDEFINED;
 	else
 	{
@@ -215,6 +215,9 @@ static void sdl2_poll_events(void*)
 					case SDL_WINDOWEVENT_RESTORED:
 						on_window_fullscreen_event(window.wid, false);
 						break;
+					case SDL_WINDOWEVENT_LEAVE:
+						on_window_leave_event(window.wid);
+						break;
 				}
 				break;
 			}
@@ -325,11 +328,10 @@ static void sdl2_invalidate(PlatformWindow* window, const uint32_t* src_pixels,
 static void sdl2_request_fullscreen(PlatformWindow* window, bool fullscreen)
 {
 	auto& sdl_window = *static_cast<SDLWindow*>(window);
-	(void)sdl_window;
-	(void)fullscreen;
+	SDL_SetWindowFullscreen(sdl_window.window, fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
 }
 
-BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_system_cursor(SystemCursorType type)
+static BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_system_cursor(SystemCursorType type)
 {
 	SDL_SystemCursor sdl_type;
 	switch (type)
@@ -385,7 +387,7 @@ BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_system_cursor(SystemCurso
 	return BAN::UniqPtr<PlatformCursor>(BAN::move(cursor));
 }
 
-BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_bitmap_cursor(const uint32_t* pixels, uint32_t width, uint32_t height, int32_t origin_x, int32_t origin_y)
+static BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_bitmap_cursor(const uint32_t* pixels, uint32_t width, uint32_t height, int32_t origin_x, int32_t origin_y)
 {
 	auto cursor = TRY(BAN::UniqPtr<SDLCursor>::create());
 
@@ -396,6 +398,8 @@ BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_bitmap_cursor(const uint3
 		return BAN::Error::from_errno(EFAULT);
 	}
 
+	origin_x = BAN::Math::clamp<int32_t>(origin_x, 0, width  - 1);
+	origin_y = BAN::Math::clamp<int32_t>(origin_y, 0, height - 1);
 	cursor->cursor = SDL_CreateColorCursor(surface, origin_x, origin_y);
 
 	SDL_FreeSurface(surface);
@@ -409,7 +413,7 @@ BAN::ErrorOr<BAN::UniqPtr<PlatformCursor>> sdl2_create_bitmap_cursor(const uint3
 	return BAN::UniqPtr<PlatformCursor>(BAN::move(cursor));
 }
 
-void sdl2_set_cursor(PlatformWindow*, PlatformCursor* cursor)
+static void sdl2_set_cursor(PlatformWindow*, PlatformCursor* cursor)
 {
 	if (cursor == nullptr)
 		SDL_SetCursor(s_default_cursor);

xbanan/main.cpp

@@ -290,6 +290,18 @@ int main()
 				window.event_masks.remove(&client_info);
 			}
 
+			for (auto it = client_info.objects.begin(); it != client_info.objects.end();)
+			{
+				auto obj_it = g_objects.find(*it);
+				if (obj_it == g_objects.end() || obj_it->value->type != Object::Type::Window)
+					it++;
+				else
+				{
+					(void)destroy_window(client_info, *it);
+					it = client_info.objects.begin();
+				}
+			}
+
 			for (auto id : client_info.objects)
 			{
 				auto it = g_objects.find(id);
@@ -304,15 +316,14 @@ int main()
 					case Object::Type::Pixmap:
 					case Object::Type::GraphicsContext:
 					case Object::Type::Font:
-					case Object::Type::Window:
 						break;
+					case Object::Type::Window:
+						ASSERT_NOT_REACHED();
 					case Object::Type::Extension:
-					{
 						auto& extension = object.object.get<Object::Extension>();
 						extension.destructor(extension);
 						break;
 				}
-				}
 
 				g_objects.remove(it);
 			}