Render drag icons

include/sway/input/seat.h

@@ -21,6 +21,19 @@ struct sway_seat_container {
 	struct wl_listener destroy;
 };
 
+struct sway_drag_icon {
+	struct sway_seat *seat;
+	struct wlr_drag_icon *wlr_drag_icon;
+	struct wl_list link; // sway_root::drag_icons
+
+	double x, y; // in layout-local coordinates
+
+	struct wl_listener surface_commit;
+	struct wl_listener map;
+	struct wl_listener unmap;
+	struct wl_listener destroy;
+};
+
 struct sway_seat {
 	struct wlr_seat *wlr_seat;
 	struct sway_cursor *cursor;
@@ -35,8 +48,13 @@ struct sway_seat {
 	// If exclusive_client is set, no other clients will receive input events
 	struct wl_client *exclusive_client;
 
+	// Last touch point
+	int32_t touch_id;
+	double touch_x, touch_y;
+
 	struct wl_listener focus_destroy;
 	struct wl_listener new_container;
+	struct wl_listener new_drag_icon;
 
 	struct wl_list devices; // sway_seat_device::link
 
@@ -114,4 +132,6 @@ struct seat_config *seat_get_config(struct sway_seat *seat);
 
 bool seat_is_input_allowed(struct sway_seat *seat, struct wlr_surface *surface);
 
+void drag_icon_update_position(struct sway_drag_icon *icon);
+
 #endif

include/sway/tree/layout.h

@@ -28,6 +28,7 @@ struct sway_root {
 	struct wl_listener output_layout_change;
 
 	struct wl_list xwayland_unmanaged; // sway_xwayland_unmanaged::link
+	struct wl_list drag_icons; // sway_drag_icon::link
 
 	struct wlr_texture *debug_tree;
 

sway/desktop/output.c

@@ -161,6 +161,21 @@ static void unmanaged_for_each_surface(struct wl_list *unmanaged,
 	}
 }
 
+static void drag_icons_for_each_surface(struct wl_list *drag_icons,
+		struct sway_output *output, struct root_geometry *geo,
+		wlr_surface_iterator_func_t iterator, void *user_data) {
+	struct sway_drag_icon *drag_icon;
+	wl_list_for_each(drag_icon, drag_icons, link) {
+		double ox = drag_icon->x - output->swayc->x;
+		double oy = drag_icon->y - output->swayc->y;
+
+		if (drag_icon->wlr_drag_icon->mapped) {
+			surface_for_each_surface(drag_icon->wlr_drag_icon->surface,
+				ox, oy, geo, iterator, user_data);
+		}
+	}
+}
+
 static void scale_box(struct wlr_box *box, float scale) {
 	box->x *= scale;
 	box->y *= scale;
@@ -270,6 +285,17 @@ static void render_unmanaged(struct sway_output *output,
 		render_surface_iterator, &data);
 }
 
+static void render_drag_icons(struct sway_output *output,
+		pixman_region32_t *damage, struct wl_list *drag_icons) {
+	struct render_data data = {
+		.output = output,
+		.damage = damage,
+		.alpha = 1.0f,
+	};
+	drag_icons_for_each_surface(drag_icons, output, &data.root_geo,
+		render_surface_iterator, &data);
+}
+
 static void render_rect(struct wlr_output *wlr_output,
 		pixman_region32_t *output_damage, const struct wlr_box *_box,
 		float color[static 4]) {
@@ -911,6 +937,7 @@ static void render_output(struct sway_output *output, struct timespec *when,
 	}
 	render_layer(output, damage,
 		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+	render_drag_icons(output, damage, &root_container.sway_root->drag_icons);
 
 renderer_end:
 	if (root_container.sway_root->debug_tree) {
@@ -961,6 +988,12 @@ static void send_frame_done_unmanaged(struct send_frame_done_data *data,
 		send_frame_done_iterator, data);
 }
 
+static void send_frame_done_drag_icons(struct send_frame_done_data *data,
+		struct wl_list *drag_icons) {
+	drag_icons_for_each_surface(drag_icons, data->output, &data->root_geo,
+		send_frame_done_iterator, data);
+}
+
 static void send_frame_done_container_iterator(struct sway_container *con,
 		void *_data) {
 	struct send_frame_done_data *data = _data;
@@ -1014,6 +1047,7 @@ static void send_frame_done(struct sway_output *output, struct timespec *when) {
 
 	send_frame_done_layer(&data,
 		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+	send_frame_done_drag_icons(&data, &root_container.sway_root->drag_icons);
 }
 
 static void damage_handle_frame(struct wl_listener *listener, void *data) {

sway/input/cursor.c

@@ -144,21 +144,22 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 		time_msec = get_current_time_msec();
 	}
 
-	struct wlr_seat *seat = cursor->seat->wlr_seat;
+	struct sway_seat *seat = cursor->seat;
+	struct wlr_seat *wlr_seat = seat->wlr_seat;
 	struct wlr_surface *surface = NULL;
 	double sx, sy;
 
 	// Find the container beneath the pointer's previous position
-	struct sway_container *prev_c = container_at_coords(cursor->seat,
+	struct sway_container *prev_c = container_at_coords(seat,
 			cursor->previous.x, cursor->previous.y, &surface, &sx, &sy);
 	// Update the stored previous position
 	cursor->previous.x = cursor->cursor->x;
 	cursor->previous.y = cursor->cursor->y;
 
-	struct sway_container *c = container_at_coords(cursor->seat,
+	struct sway_container *c = container_at_coords(seat,
 			cursor->cursor->x, cursor->cursor->y, &surface, &sx, &sy);
 	if (c && config->focus_follows_mouse && allow_refocusing) {
-		struct sway_container *focus = seat_get_focus(cursor->seat);
+		struct sway_container *focus = seat_get_focus(seat);
 		if (focus && c->type == C_WORKSPACE) {
 			// Only follow the mouse if it would move to a new output
 			// Otherwise we'll focus the workspace, which is probably wrong
@@ -170,20 +171,20 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 				output = container_parent(c, C_OUTPUT);
 			}
 			if (output != focus) {
-				seat_set_focus_warp(cursor->seat, c, false);
+				seat_set_focus_warp(seat, c, false);
 			}
 		} else if (c->type == C_VIEW) {
 			// Focus c if both of the following are true:
 			// - cursor is over a new view, i.e. entered a new window; and
 			// - the new view is visible, i.e. not hidden in a stack or tab.
 			if (c != prev_c && view_is_visible(c->sway_view)) {
-				seat_set_focus_warp(cursor->seat, c, false);
+				seat_set_focus_warp(seat, c, false);
 			} else {
 				struct sway_container *next_focus =
-					seat_get_focus_inactive(cursor->seat, &root_container);
+					seat_get_focus_inactive(seat, &root_container);
 				if (next_focus && next_focus->type == C_VIEW &&
 						view_is_visible(next_focus->sway_view)) {
-					seat_set_focus_warp(cursor->seat, next_focus, false);
+					seat_set_focus_warp(seat, next_focus, false);
 				}
 			}
 		}
@@ -202,12 +203,18 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 
 	// send pointer enter/leave
 	if (surface != NULL) {
-		if (seat_is_input_allowed(cursor->seat, surface)) {
-			wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
-			wlr_seat_pointer_notify_motion(seat, time_msec, sx, sy);
+		if (seat_is_input_allowed(seat, surface)) {
+			wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
+			wlr_seat_pointer_notify_motion(wlr_seat, time_msec, sx, sy);
 		}
 	} else {
-		wlr_seat_pointer_clear_focus(seat);
+		wlr_seat_pointer_clear_focus(wlr_seat);
+	}
+
+	struct wlr_drag_icon *wlr_drag_icon;
+	wl_list_for_each(wlr_drag_icon, &wlr_seat->drag_icons, link) {
+		struct sway_drag_icon *drag_icon = wlr_drag_icon->data;
+		drag_icon_update_position(drag_icon);
 	}
 }
 
@@ -293,22 +300,27 @@ static void handle_touch_down(struct wl_listener *listener, void *data) {
 	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_touch_down *event = data;
 
-	struct wlr_seat *seat = cursor->seat->wlr_seat;
+	struct sway_seat *seat = cursor->seat;
+	struct wlr_seat *wlr_seat = seat->wlr_seat;
 	struct wlr_surface *surface = NULL;
 
 	double lx, ly;
 	wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device,
 			event->x, event->y, &lx, &ly);
 	double sx, sy;
-	container_at_coords(cursor->seat, lx, ly, &surface, &sx, &sy);
+	container_at_coords(seat, lx, ly, &surface, &sx, &sy);
+
+	seat->touch_id = event->touch_id;
+	seat->touch_x = lx;
+	seat->touch_y = ly;
 
 	if (!surface) {
 		return;
 	}
 
 	// TODO: fall back to cursor simulation if client has not bound to touch
-	if (seat_is_input_allowed(cursor->seat, surface)) {
-		wlr_seat_touch_notify_down(seat, surface, event->time_msec,
+	if (seat_is_input_allowed(seat, surface)) {
+		wlr_seat_touch_notify_down(wlr_seat, surface, event->time_msec,
 				event->touch_id, sx, sy);
 		cursor->image_client = NULL;
 		wlr_cursor_set_image(cursor->cursor, NULL, 0, 0, 0, 0, 0, 0);
@@ -330,7 +342,8 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_touch_motion *event = data;
 
-	struct wlr_seat *seat = cursor->seat->wlr_seat;
+	struct sway_seat *seat = cursor->seat;
+	struct wlr_seat *wlr_seat = seat->wlr_seat;
 	struct wlr_surface *surface = NULL;
 
 	double lx, ly;
@@ -339,14 +352,25 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	double sx, sy;
 	container_at_coords(cursor->seat, lx, ly, &surface, &sx, &sy);
 
+	if (seat->touch_id == event->touch_id) {
+		seat->touch_x = lx;
+		seat->touch_y = ly;
+
+		struct wlr_drag_icon *wlr_drag_icon;
+		wl_list_for_each(wlr_drag_icon, &wlr_seat->drag_icons, link) {
+			struct sway_drag_icon *drag_icon = wlr_drag_icon->data;
+			drag_icon_update_position(drag_icon);
+		}
+	}
+
 	if (!surface) {
 		return;
 	}
 
 	// TODO: fall back to cursor simulation if client has not bound to touch
 	if (seat_is_input_allowed(cursor->seat, surface)) {
-		wlr_seat_touch_notify_motion(
-				seat, event->time_msec, event->touch_id, sx, sy);
+		wlr_seat_touch_notify_motion(wlr_seat, event->time_msec,
+			event->touch_id, sx, sy);
 	}
 }
 

sway/input/seat.c

@@ -6,21 +6,22 @@
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_xcursor_manager.h>
+#include "log.h"
 #include "sway/debug.h"
-#include "sway/tree/container.h"
-#include "sway/tree/workspace.h"
-#include "sway/input/seat.h"
+#include "sway/desktop.h"
 #include "sway/input/cursor.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/keyboard.h"
+#include "sway/input/seat.h"
 #include "sway/ipc-server.h"
 #include "sway/layers.h"
 #include "sway/output.h"
 #include "sway/tree/arrange.h"
 #include "sway/tree/container.h"
+#include "sway/tree/container.h"
 #include "sway/tree/view.h"
 #include "sway/tree/workspace.h"
-#include "log.h"
+#include "sway/tree/workspace.h"
 
 static void seat_device_destroy(struct sway_seat_device *seat_device) {
 	if (!seat_device) {
@@ -40,6 +41,8 @@ void seat_destroy(struct sway_seat *seat) {
 		seat_device_destroy(seat_device);
 	}
 	sway_cursor_destroy(seat->cursor);
+	wl_list_remove(&seat->new_container.link);
+	wl_list_remove(&seat->new_drag_icon.link);
 	wl_list_remove(&seat->link);
 	wlr_seat_destroy(seat->wlr_seat);
 }
@@ -234,6 +237,90 @@ static void handle_new_container(struct wl_listener *listener, void *data) {
 	seat_container_from_container(seat, con);
 }
 
+static void drag_icon_damage_whole(struct sway_drag_icon *icon) {
+	if (!icon->wlr_drag_icon->mapped) {
+		return;
+	}
+	desktop_damage_surface(icon->wlr_drag_icon->surface, icon->x, icon->y, true);
+}
+
+void drag_icon_update_position(struct sway_drag_icon *icon) {
+	drag_icon_damage_whole(icon);
+
+	struct wlr_drag_icon *wlr_icon = icon->wlr_drag_icon;
+	struct sway_seat *seat = icon->seat;
+	struct wlr_cursor *cursor = seat->cursor->cursor;
+	if (wlr_icon->is_pointer) {
+		icon->x = cursor->x + wlr_icon->sx;
+		icon->y = cursor->y + wlr_icon->sy;
+	} else {
+		struct wlr_touch_point *point =
+			wlr_seat_touch_get_point(seat->wlr_seat, wlr_icon->touch_id);
+		if (point == NULL) {
+			return;
+		}
+		icon->x = seat->touch_x + wlr_icon->sx;
+		icon->y = seat->touch_y + wlr_icon->sy;
+	}
+
+	drag_icon_damage_whole(icon);
+}
+
+static void drag_icon_handle_surface_commit(struct wl_listener *listener,
+		void *data) {
+	struct sway_drag_icon *icon =
+		wl_container_of(listener, icon, surface_commit);
+	drag_icon_update_position(icon);
+}
+
+static void drag_icon_handle_map(struct wl_listener *listener, void *data) {
+	struct sway_drag_icon *icon = wl_container_of(listener, icon, map);
+	drag_icon_damage_whole(icon);
+}
+
+static void drag_icon_handle_unmap(struct wl_listener *listener, void *data) {
+	struct sway_drag_icon *icon = wl_container_of(listener, icon, unmap);
+	drag_icon_damage_whole(icon);
+}
+
+static void drag_icon_handle_destroy(struct wl_listener *listener,
+		void *data) {
+	struct sway_drag_icon *icon = wl_container_of(listener, icon, destroy);
+	icon->wlr_drag_icon->data = NULL;
+	wl_list_remove(&icon->link);
+	wl_list_remove(&icon->surface_commit.link);
+	wl_list_remove(&icon->unmap.link);
+	wl_list_remove(&icon->destroy.link);
+	free(icon);
+}
+
+static void handle_new_drag_icon(struct wl_listener *listener, void *data) {
+	struct sway_seat *seat = wl_container_of(listener, seat, new_drag_icon);
+	struct wlr_drag_icon *wlr_drag_icon = data;
+
+	struct sway_drag_icon *icon = calloc(1, sizeof(struct sway_drag_icon));
+	if (icon == NULL) {
+		wlr_log(L_ERROR, "Allocation failed");
+		return;
+	}
+	icon->seat = seat;
+	icon->wlr_drag_icon = wlr_drag_icon;
+	wlr_drag_icon->data = icon;
+
+	icon->surface_commit.notify = drag_icon_handle_surface_commit;
+	wl_signal_add(&wlr_drag_icon->surface->events.commit, &icon->surface_commit);
+	icon->unmap.notify = drag_icon_handle_unmap;
+	wl_signal_add(&wlr_drag_icon->events.unmap, &icon->unmap);
+	icon->map.notify = drag_icon_handle_map;
+	wl_signal_add(&wlr_drag_icon->events.map, &icon->map);
+	icon->destroy.notify = drag_icon_handle_destroy;
+	wl_signal_add(&wlr_drag_icon->events.destroy, &icon->destroy);
+
+	wl_list_insert(&root_container.sway_root->drag_icons, &icon->link);
+
+	drag_icon_update_position(icon);
+}
+
 static void collect_focus_iter(struct sway_container *con, void *data) {
 	struct sway_seat *seat = data;
 	if (con->type > C_WORKSPACE) {
@@ -278,6 +365,9 @@ struct sway_seat *seat_create(struct sway_input_manager *input,
 		&seat->new_container);
 	seat->new_container.notify = handle_new_container;
 
+	wl_signal_add(&seat->wlr_seat->events.new_drag_icon, &seat->new_drag_icon);
+	seat->new_drag_icon.notify = handle_new_drag_icon;
+
 	seat->input = input;
 	wl_list_init(&seat->devices);
 

sway/tree/layout.c

@@ -37,6 +37,7 @@ void layout_init(void) {
 	root_container.sway_root->output_layout = wlr_output_layout_create();
 	wl_list_init(&root_container.sway_root->outputs);
 	wl_list_init(&root_container.sway_root->xwayland_unmanaged);
+	wl_list_init(&root_container.sway_root->drag_icons);
 	wl_signal_init(&root_container.sway_root->events.new_container);
 
 	root_container.sway_root->output_layout_change.notify =