diff --git a/include/wlr/types/wlr_scene.h b/include/wlr/types/wlr_scene.h index 46635f4bf..962b01bcc 100644 --- a/include/wlr/types/wlr_scene.h +++ b/include/wlr/types/wlr_scene.h @@ -131,8 +131,6 @@ struct wlr_scene_surface { struct wlr_addon addon; struct wl_listener outputs_update; - struct wl_listener output_enter; - struct wl_listener output_leave; struct wl_listener output_sample; struct wl_listener frame_done; struct wl_listener surface_destroy; diff --git a/types/scene/surface.c b/types/scene/surface.c index 7b4d7fd36..c7a53a1b3 100644 --- a/types/scene/surface.c +++ b/types/scene/surface.c @@ -94,14 +94,44 @@ static void handle_scene_buffer_outputs_update( struct wl_listener *listener, void *data) { struct wlr_scene_surface *surface = wl_container_of(listener, surface, outputs_update); + struct wlr_scene_outputs_update_event *event = data; struct wlr_scene *scene = scene_node_get_root(&surface->buffer->node); // If the surface is no longer visible on any output, keep the last sent // preferred configuration to avoid unnecessary redraws - if (wl_list_empty(&surface->surface->current_outputs)) { + if (event->size == 0) { return; } + // To avoid sending redundant leave/enter events when a surface is hidden and then shown + // without moving to a different output the following policy is implemented: + // + // 1. When a surface transitions from being visible on >0 outputs to being visible on 0 outputs + // don't send any leave events. + // + // 2. When a surface transitions from being visible on 0 outputs to being visible on >0 outputs + // send leave events for all entered outputs on which the surface is no longer visible as + // well as enter events for any outputs not already entered. + struct wlr_surface_output *entered_output; + wl_list_for_each(entered_output, &surface->surface->current_outputs, link) { + bool active = false; + for (size_t i = 0; i < event->size; i++) { + if (entered_output->output == event->active[i]->output) { + active = true; + break; + } + } + if (!active) { + wlr_surface_send_leave(surface->surface, entered_output->output); + } + } + + for (size_t i = 0; i < event->size; i++) { + // This function internally checks if an enter event was already sent for the output + // to avoid sending redundant events. + wlr_surface_send_enter(surface->surface, event->active[i]->output); + } + double scale = get_surface_preferred_buffer_scale(surface->surface); wlr_fractional_scale_v1_notify_scale(surface->surface, scale); wlr_surface_set_preferred_buffer_scale(surface->surface, ceil(scale)); @@ -114,24 +144,6 @@ static void handle_scene_buffer_outputs_update( } } -static void handle_scene_buffer_output_enter( - struct wl_listener *listener, void *data) { - struct wlr_scene_surface *surface = - wl_container_of(listener, surface, output_enter); - struct wlr_scene_output *output = data; - - wlr_surface_send_enter(surface->surface, output->output); -} - -static void handle_scene_buffer_output_leave( - struct wl_listener *listener, void *data) { - struct wlr_scene_surface *surface = - wl_container_of(listener, surface, output_leave); - struct wlr_scene_output *output = data; - - wlr_surface_send_leave(surface->surface, output->output); -} - static void handle_scene_buffer_output_sample( struct wl_listener *listener, void *data) { struct wlr_scene_surface *surface = @@ -380,8 +392,6 @@ static void surface_addon_destroy(struct wlr_addon *addon) { wlr_addon_finish(&surface->addon); wl_list_remove(&surface->outputs_update.link); - wl_list_remove(&surface->output_enter.link); - wl_list_remove(&surface->output_leave.link); wl_list_remove(&surface->output_sample.link); wl_list_remove(&surface->frame_done.link); wl_list_remove(&surface->surface_destroy.link); @@ -427,12 +437,6 @@ struct wlr_scene_surface *wlr_scene_surface_create(struct wlr_scene_tree *parent surface->outputs_update.notify = handle_scene_buffer_outputs_update; wl_signal_add(&scene_buffer->events.outputs_update, &surface->outputs_update); - surface->output_enter.notify = handle_scene_buffer_output_enter; - wl_signal_add(&scene_buffer->events.output_enter, &surface->output_enter); - - surface->output_leave.notify = handle_scene_buffer_output_leave; - wl_signal_add(&scene_buffer->events.output_leave, &surface->output_leave); - surface->output_sample.notify = handle_scene_buffer_output_sample; wl_signal_add(&scene_buffer->events.output_sample, &surface->output_sample);