Implement fullscreen.

include/sway/ipc-server.h

@@ -1,6 +1,7 @@
 #ifndef _SWAY_IPC_SERVER_H
 #define _SWAY_IPC_SERVER_H
 #include <sys/socket.h>
+#include "sway/config.h"
 #include "sway/tree/container.h"
 #include "ipc.h"
 

include/sway/tree/container.h

@@ -72,9 +72,13 @@ struct sway_container {
 	// For C_OUTPUT, this is the output position in layout coordinates
 	// For other types, this is the position in output-local coordinates
 	double x, y;
+	double saved_x, saved_y;
 	// does not include borders or gaps.
 	double width, height;
 
+	// For C_WORKSPACE only
+	struct sway_view *fullscreen;
+
 	list_t *children;
 
 	struct sway_container *parent;

include/sway/tree/view.h

@@ -28,6 +28,7 @@ struct sway_view_impl {
 	void (*configure)(struct sway_view *view, double ox, double oy, int width,
 		int height);
 	void (*set_activated)(struct sway_view *view, bool activated);
+	void (*set_fullscreen)(struct sway_view *view, bool fullscreen);
 	void (*for_each_surface)(struct sway_view *view,
 		wlr_surface_iterator_func_t iterator, void *user_data);
 	void (*close)(struct sway_view *view);
@@ -41,6 +42,8 @@ struct sway_view {
 	struct sway_container *swayc; // NULL for unmanaged views
 	struct wlr_surface *surface; // NULL for unmapped views
 	int width, height;
+	int saved_width, saved_height;
+	bool is_fullscreen;
 
 	union {
 		struct wlr_xdg_surface_v6 *wlr_xdg_surface_v6;
@@ -63,6 +66,7 @@ struct sway_xdg_shell_v6_view {
 	struct wl_listener request_move;
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
+	struct wl_listener request_fullscreen;
 	struct wl_listener new_popup;
 	struct wl_listener map;
 	struct wl_listener unmap;
@@ -79,6 +83,7 @@ struct sway_xwayland_view {
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
 	struct wl_listener request_configure;
+	struct wl_listener request_fullscreen;
 	struct wl_listener map;
 	struct wl_listener unmap;
 	struct wl_listener destroy;
@@ -93,6 +98,7 @@ struct sway_xwayland_unmanaged {
 	int lx, ly;
 
 	struct wl_listener request_configure;
+	struct wl_listener request_fullscreen;
 	struct wl_listener commit;
 	struct wl_listener map;
 	struct wl_listener unmap;
@@ -106,6 +112,7 @@ struct sway_wl_shell_view {
 	struct wl_listener request_move;
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
+	struct wl_listener request_fullscreen;
 	struct wl_listener destroy;
 
 	int pending_width, pending_height;
@@ -155,6 +162,8 @@ void view_configure(struct sway_view *view, double ox, double oy, int width,
 
 void view_set_activated(struct sway_view *view, bool activated);
 
+void view_set_fullscreen(struct sway_view *view, bool fullscreen);
+
 void view_close(struct sway_view *view);
 
 void view_damage(struct sway_view *view, bool whole);

sway/commands.c

@@ -99,6 +99,7 @@ static struct cmd_handler handlers[] = {
 	{ "exec", cmd_exec },
 	{ "exec_always", cmd_exec_always },
 	{ "focus_follows_mouse", cmd_focus_follows_mouse },
+	{ "fullscreen", cmd_fullscreen },
 	{ "include", cmd_include },
 	{ "input", cmd_input },
 	{ "mode", cmd_mode },

sway/commands/fullscreen.c

@@ -0,0 +1,40 @@
+#include <wlr/types/wlr_wl_shell.h>
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/tree/container.h"
+#include "sway/tree/view.h"
+#include "sway/tree/layout.h"
+
+// fullscreen toggle|enable|disable
+struct cmd_results *cmd_fullscreen(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if (config->reading) return cmd_results_new(CMD_FAILURE, "fullscreen", "Can't be used in config file.");
+	if (!config->active) return cmd_results_new(CMD_FAILURE, "fullscreen", "Can only be used when sway is running.");
+	if ((error = checkarg(argc, "fullscreen", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+	struct sway_container *container =
+		config->handler_context.current_container;
+	if (container->type != C_VIEW) {
+		return cmd_results_new(CMD_INVALID, "fullscreen",
+				"Only views can fullscreen");
+	}
+	struct sway_view *view = container->sway_view;
+	bool wants_fullscreen;
+
+	if (strcmp(argv[0], "enable") == 0) {
+		wants_fullscreen = true;
+	} else if (strcmp(argv[0], "disable") == 0) {
+		wants_fullscreen = false;
+	} else if (strcmp(argv[0], "toggle") == 0) {
+		wants_fullscreen = !view->is_fullscreen;
+	} else {
+		return cmd_results_new(CMD_INVALID, "fullscreen",
+				"Expected 'fullscreen <enable|disable|toggle>'");
+	}
+
+	view_set_fullscreen(view, wants_fullscreen);
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}

sway/desktop/output.c

@@ -273,17 +273,25 @@ static void render_output(struct sway_output *output, struct timespec *when,
 	float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
 	wlr_renderer_clear(renderer, clear_color);
 
-	render_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
+	struct sway_container *workspace = output_get_active_workspace(output);
+
+	if (workspace->fullscreen) {
+		wlr_output_set_fullscreen_surface(wlr_output,
+				workspace->fullscreen->surface);
+	} else {
+		wlr_output_set_fullscreen_surface(wlr_output, NULL);
+		render_layer(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
 		render_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
 
-	struct sway_container *workspace = output_get_active_workspace(output);
 		render_container(output, workspace);
 
 		render_unmanaged(output, &root_container.sway_root->xwayland_unmanaged);
 
-	// TODO: consider revising this when fullscreen windows are supported
 		render_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
-	render_layer(output, &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+		render_layer(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+	}
 
 renderer_end:
 	if (root_container.sway_root->debug_tree) {

sway/desktop/xdg_shell_v6.c

@@ -118,6 +118,14 @@ static void set_activated(struct sway_view *view, bool activated) {
 	}
 }
 
+static void set_fullscreen(struct sway_view *view, bool fullscreen) {
+	if (xdg_shell_v6_view_from_view(view) == NULL) {
+		return;
+	}
+	struct wlr_xdg_surface_v6 *surface = view->wlr_xdg_surface_v6;
+	wlr_xdg_toplevel_v6_set_fullscreen(surface, fullscreen);
+}
+
 static void for_each_surface(struct sway_view *view,
 		wlr_surface_iterator_func_t iterator, void *user_data) {
 	if (xdg_shell_v6_view_from_view(view) == NULL) {
@@ -146,6 +154,7 @@ static void destroy(struct sway_view *view) {
 	wl_list_remove(&xdg_shell_v6_view->destroy.link);
 	wl_list_remove(&xdg_shell_v6_view->map.link);
 	wl_list_remove(&xdg_shell_v6_view->unmap.link);
+	wl_list_remove(&xdg_shell_v6_view->request_fullscreen.link);
 	free(xdg_shell_v6_view);
 }
 
@@ -153,6 +162,7 @@ static const struct sway_view_impl view_impl = {
 	.get_prop = get_prop,
 	.configure = configure,
 	.set_activated = set_activated,
+	.set_fullscreen = set_fullscreen,
 	.for_each_surface = for_each_surface,
 	.close = _close,
 	.destroy = destroy,
@@ -210,6 +220,18 @@ static void handle_destroy(struct wl_listener *listener, void *data) {
 	view_destroy(&xdg_shell_v6_view->view);
 }
 
+static void handle_request_fullscreen(struct wl_listener *listener, void *data) {
+	struct sway_xdg_shell_v6_view *xdg_shell_v6_view =
+		wl_container_of(listener, xdg_shell_v6_view, request_fullscreen);
+	struct wlr_xdg_toplevel_v6_set_fullscreen_event *e = data;
+
+	if (xdg_shell_v6_view->view.wlr_xdg_surface_v6->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	view_set_fullscreen(&xdg_shell_v6_view->view, e->fullscreen);
+}
+
 void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
 	struct sway_server *server = wl_container_of(listener, server,
 		xdg_shell_v6_surface);
@@ -246,4 +268,8 @@ void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
 
 	xdg_shell_v6_view->destroy.notify = handle_destroy;
 	wl_signal_add(&xdg_surface->events.destroy, &xdg_shell_v6_view->destroy);
+
+	xdg_shell_v6_view->request_fullscreen.notify = handle_request_fullscreen;
+	wl_signal_add(&xdg_surface->toplevel->events.request_fullscreen,
+			&xdg_shell_v6_view->request_fullscreen);
 }

sway/desktop/xwayland.c

@@ -25,6 +25,15 @@ static void unmanaged_handle_request_configure(struct wl_listener *listener,
 		ev->width, ev->height);
 }
 
+static void unmanaged_handle_request_fullscreen(struct wl_listener *listener,
+		void *data) {
+	struct sway_xwayland_view *xwayland_view =
+		wl_container_of(listener, xwayland_view, request_fullscreen);
+	struct sway_view *view = &xwayland_view->view;
+	struct wlr_xwayland_surface *xsurface = view->wlr_xwayland_surface;
+	view_set_fullscreen(view, xsurface->fullscreen);
+}
+
 static void unmanaged_handle_commit(struct wl_listener *listener, void *data) {
 	struct sway_xwayland_unmanaged *surface =
 		wl_container_of(listener, surface, commit);
@@ -106,6 +115,9 @@ static struct sway_xwayland_unmanaged *create_unmanaged(
 	wl_signal_add(&xsurface->events.request_configure,
 		&surface->request_configure);
 	surface->request_configure.notify = unmanaged_handle_request_configure;
+	wl_signal_add(&xsurface->events.request_fullscreen,
+		&surface->request_fullscreen);
+	surface->request_fullscreen.notify = unmanaged_handle_request_fullscreen;
 	wl_signal_add(&xsurface->events.map, &surface->map);
 	surface->map.notify = unmanaged_handle_map;
 	wl_signal_add(&xsurface->events.unmap, &surface->unmap);
@@ -179,6 +191,14 @@ static void set_activated(struct sway_view *view, bool activated) {
 	wlr_xwayland_surface_activate(surface, activated);
 }
 
+static void set_fullscreen(struct sway_view *view, bool fullscreen) {
+	if (xwayland_view_from_view(view) == NULL) {
+		return;
+	}
+	struct wlr_xwayland_surface *surface = view->wlr_xwayland_surface;
+	wlr_xwayland_surface_set_fullscreen(surface, fullscreen);
+}
+
 static void _close(struct sway_view *view) {
 	if (xwayland_view_from_view(view) == NULL) {
 		return;
@@ -193,6 +213,7 @@ static void destroy(struct sway_view *view) {
 	}
 	wl_list_remove(&xwayland_view->destroy.link);
 	wl_list_remove(&xwayland_view->request_configure.link);
+	wl_list_remove(&xwayland_view->request_fullscreen.link);
 	wl_list_remove(&xwayland_view->map.link);
 	wl_list_remove(&xwayland_view->unmap.link);
 	free(xwayland_view);
@@ -202,6 +223,7 @@ static const struct sway_view_impl view_impl = {
 	.get_prop = get_prop,
 	.configure = configure,
 	.set_activated = set_activated,
+	.set_fullscreen = set_fullscreen,
 	.close = _close,
 	.destroy = destroy,
 };
@@ -263,6 +285,14 @@ static void handle_request_configure(struct wl_listener *listener, void *data) {
 		ev->width, ev->height);
 }
 
+static void handle_request_fullscreen(struct wl_listener *listener, void *data) {
+	struct sway_xwayland_view *xwayland_view =
+		wl_container_of(listener, xwayland_view, request_fullscreen);
+	struct sway_view *view = &xwayland_view->view;
+	struct wlr_xwayland_surface *xsurface = view->wlr_xwayland_surface;
+	view_set_fullscreen(view, xsurface->fullscreen);
+}
+
 void handle_xwayland_surface(struct wl_listener *listener, void *data) {
 	struct sway_server *server = wl_container_of(listener, server,
 		xwayland_surface);
@@ -298,6 +328,10 @@ void handle_xwayland_surface(struct wl_listener *listener, void *data) {
 		&xwayland_view->request_configure);
 	xwayland_view->request_configure.notify = handle_request_configure;
 
+	wl_signal_add(&xsurface->events.request_fullscreen,
+		&xwayland_view->request_fullscreen);
+	xwayland_view->request_fullscreen.notify = handle_request_fullscreen;
+
 	wl_signal_add(&xsurface->events.unmap, &xwayland_view->unmap);
 	xwayland_view->unmap.notify = handle_unmap;
 

sway/input/seat.c

@@ -448,6 +448,20 @@ void seat_set_focus_warp(struct sway_seat *seat,
 		return;
 	}
 
+	struct sway_container *last_workspace = last_focus;
+	if (last_workspace && last_workspace->type != C_WORKSPACE) {
+		last_workspace = container_parent(last_workspace, C_WORKSPACE);
+	}
+	struct sway_container *new_workspace = container;
+	if (new_workspace && new_workspace->type != C_WORKSPACE) {
+		new_workspace = container_parent(new_workspace, C_WORKSPACE);
+	}
+
+	if (last_workspace == new_workspace && last_workspace->fullscreen
+			&& !container->sway_view->is_fullscreen) {
+		return;
+	}
+
 	struct sway_container *last_output = last_focus;
 	if (last_output && last_output->type != C_OUTPUT) {
 		last_output = container_parent(last_output, C_OUTPUT);

sway/meson.build

@@ -34,6 +34,7 @@ sway_sources = files(
 	'commands/exec_always.c',
 	'commands/focus.c',
 	'commands/focus_follows_mouse.c',
+	'commands/fullscreen.c',
 	'commands/kill.c',
 	'commands/opacity.c',
 	'commands/include.c',

sway/tree/layout.c

@@ -137,6 +137,21 @@ void container_move_to(struct sway_container *container,
 			|| container_has_anscestor(container, destination)) {
 		return;
 	}
+
+	if (container->sway_view->is_fullscreen) {
+		struct sway_container *old_workspace = container;
+		if (old_workspace->type != C_WORKSPACE) {
+			old_workspace = container_parent(old_workspace, C_WORKSPACE);
+		}
+		struct sway_container *new_workspace = destination;
+		if (new_workspace->type != C_WORKSPACE) {
+			new_workspace = container_parent(new_workspace, C_WORKSPACE);
+		}
+		if (old_workspace != new_workspace) {
+			view_set_fullscreen(container->sway_view, false);
+		}
+	}
+
 	struct sway_container *old_parent = container_remove_child(container);
 	container->width = container->height = 0;
 	struct sway_container *new_parent;
@@ -557,6 +572,9 @@ void arrange_windows(struct sway_container *container,
 		return;
 	case C_WORKSPACE:
 		{
+			if (container->fullscreen) {
+				return;
+			}
 			struct sway_container *output =
 				container_parent(container, C_OUTPUT);
 			struct wlr_box *area = &output->sway_output->usable_area;

sway/tree/view.c

@@ -2,6 +2,7 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_output_layout.h>
 #include "log.h"
+#include "sway/ipc-server.h"
 #include "sway/output.h"
 #include "sway/tree/container.h"
 #include "sway/tree/layout.h"
@@ -73,7 +74,46 @@ void view_set_activated(struct sway_view *view, bool activated) {
 	}
 }
 
+void view_set_fullscreen(struct sway_view *view, bool fullscreen) {
+	if (view->is_fullscreen == fullscreen) {
+		return;
+	}
+
+	struct sway_container *container = container_parent(view->swayc, C_OUTPUT);
+	struct sway_output *output = container->sway_output;
+	struct sway_container *workspace = container_parent(view->swayc, C_WORKSPACE);
+
+	if (view->impl->set_fullscreen) {
+		view->impl->set_fullscreen(view, fullscreen);
+	}
+
+	if (fullscreen) {
+		view->swayc->saved_x = view->swayc->x;
+		view->swayc->saved_y = view->swayc->y;
+		view->saved_width = view->width;
+		view->saved_height = view->height;
+		view_configure(view, 0, 0, output->wlr_output->width, output->wlr_output->height);
+		workspace->fullscreen = view;
+	} else {
+		view_configure(view, view->swayc->saved_x, view->swayc->saved_y,
+				view->saved_width, view->saved_height);
+		workspace->fullscreen = NULL;
+	}
+
+	view->is_fullscreen = fullscreen;
+	output_damage_whole(output);
+
+	arrange_windows(workspace, -1, -1);
+
+	ipc_event_window(view->swayc, "fullscreen_mode");
+}
+
 void view_close(struct sway_view *view) {
+	if (view->is_fullscreen) {
+		struct sway_container *ws = container_parent(view->swayc, C_WORKSPACE);
+		ws->fullscreen = NULL;
+	}
+
 	if (view->impl->close) {
 		view->impl->close(view);
 	}