layer: use scene-graph API more fully

...and thus simplify the usage of wlr_scene_node_at(). Specifically:

- desktop.c: in get_cursor_context() use node-description for
  layer-surfaces and layer-popups. This lays the foundations for a
  pointer-enter-event being sent when a new layer-surfaces appears under
  the pointer (even if the pointer doesn not move).

- layers.c:

  * Iterate over `struct wlr_scene_tree *layer_tree[]` rather than
    `struct wl_list layers[]` when arranging layers to avoid surfaces
    being out of sync with nodes

  * Set signal handlers after scene node creation to avoid configure
    race conditions

  * Handle scene-node destroy event rather than event of
    `struct wlr_layer_surface_v1`

  * Arrange layers on map and unmap

  * Handle client request for layer-change

Fixes issue #667
This commit is contained in:
Johan Malm 2022-12-22 21:58:55 +00:00 committed by Consolatis
parent e39fd341ec
commit 9dbac2e06f
3 changed files with 108 additions and 90 deletions

View file

@ -2,13 +2,12 @@
/*
* layers.c - layer-shell implementation
*
* Based on
* - https://git.sr.ht/~sircmpwm/wio
* - https://github.com/swaywm/sway
* Based on https://github.com/swaywm/sway
* Copyright (C) 2019 Drew DeVault and Sway developers
*/
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <wayland-server.h>
@ -20,6 +19,22 @@
#include "labwc.h"
#include "node.h"
static void
arrange_one_layer(struct output *output, const struct wlr_box *full_area,
struct wlr_box *usable_area, struct wlr_scene_tree *tree,
bool exclusive)
{
struct wlr_scene_node *node;
wl_list_for_each(node, &tree->children, link) {
struct lab_layer_surface *surface = node_layer_surface_from_node(node);
struct wlr_scene_layer_surface_v1 *scene = surface->scene_layer_surface;
if (!!scene->layer_surface->current.exclusive_zone != exclusive) {
continue;
}
wlr_scene_layer_surface_v1_configure(scene, full_area, usable_area);
}
}
void
layers_arrange(struct output *output)
{
@ -39,34 +54,19 @@ layers_arrange(struct output *output)
int nr_layers = sizeof(output->layers) / sizeof(output->layers[0]);
for (int i = 0; i < nr_layers; i++) {
struct lab_layer_surface *lab_layer_surface;
struct wlr_scene_tree *layer = output->layer_tree[i];
/*
* First we go over the list of surfaces that have
* exclusive_zone set (e.g. statusbars) because we have to
* determine the usable area before processing regular layouts.
* Process exclusive-zone clients before non-exclusive-zone
* clients, so that the latter give way to the former regardless
* of the order in which they were launched.
*/
wl_list_for_each(lab_layer_surface, &output->layers[i], link) {
struct wlr_scene_layer_surface_v1 *scene_layer_surface =
lab_layer_surface->scene_layer_surface;
if (scene_layer_surface->layer_surface->current.exclusive_zone) {
wlr_scene_layer_surface_v1_configure(
scene_layer_surface, &full_area, &usable_area);
}
}
arrange_one_layer(output, &full_area, &usable_area, layer, true);
arrange_one_layer(output, &full_area, &usable_area, layer, false);
/* Now we process regular layouts */
wl_list_for_each(lab_layer_surface, &output->layers[i], link) {
struct wlr_scene_layer_surface_v1 *scene_layer_surface =
lab_layer_surface->scene_layer_surface;
if (!scene_layer_surface->layer_surface->current.exclusive_zone) {
wlr_scene_layer_surface_v1_configure(
scene_layer_surface, &full_area, &usable_area);
}
}
wlr_scene_node_set_position(&output->layer_tree[i]->node,
scene_output->x, scene_output->y);
/* Set node position to account for output layout change */
wlr_scene_node_set_position(&layer->node, scene_output->x,
scene_output->y);
}
memcpy(&output->usable_area, &usable_area, sizeof(struct wlr_box));
@ -107,6 +107,7 @@ layers_arrange(struct output *output)
|| old_usable_area.height != output->usable_area.height) {
desktop_arrange_all_views(server);
}
cursor_update_focus(output->server);
}
static void
@ -131,60 +132,58 @@ surface_commit_notify(struct wl_listener *listener, void *data)
return;
}
if (layer_surface->current.committed
|| layer->mapped != layer_surface->mapped) {
uint32_t committed = layer_surface->current.committed;
struct output *output = (struct output *)wlr_output->data;
/* Process layer change */
if (committed & WLR_LAYER_SURFACE_V1_STATE_LAYER) {
wlr_scene_node_reparent(&layer->scene_layer_surface->tree->node,
output->layer_tree[layer_surface->current.layer]);
}
if (committed || layer->mapped != layer_surface->mapped) {
layer->mapped = layer_surface->mapped;
struct output *output =
output_from_wlr_output(layer->server, wlr_output);
layers_arrange(output);
}
}
static void
unmap(struct lab_layer_surface *layer)
destroy_notify(struct wl_listener *listener, void *data)
{
struct lab_layer_surface *layer =
wl_container_of(listener, layer, node_destroy);
wl_list_remove(&layer->link);
wl_list_remove(&layer->map.link);
wl_list_remove(&layer->unmap.link);
wl_list_remove(&layer->surface_commit.link);
wl_list_remove(&layer->output_destroy.link);
wl_list_remove(&layer->node_destroy.link);
free(layer);
}
static void
unmap_notify(struct wl_listener *listener, void *data)
{
struct lab_layer_surface *layer = wl_container_of(listener, layer, unmap);
layers_arrange(layer->scene_layer_surface->layer_surface->output->data);
struct seat *seat = &layer->server->seat;
if (seat->focused_layer == layer->scene_layer_surface->layer_surface) {
seat_set_focus_layer(seat, NULL);
}
}
static void
destroy_notify(struct wl_listener *listener, void *data)
{
struct lab_layer_surface *layer = wl_container_of(
listener, layer, destroy);
unmap(layer);
wl_list_remove(&layer->link);
wl_list_remove(&layer->destroy.link);
wl_list_remove(&layer->map.link);
wl_list_remove(&layer->unmap.link);
wl_list_remove(&layer->surface_commit.link);
if (layer->scene_layer_surface->layer_surface->output) {
wl_list_remove(&layer->output_destroy.link);
struct output *output = output_from_wlr_output(layer->server,
layer->scene_layer_surface->layer_surface->output);
layers_arrange(output);
}
free(layer);
}
static void
unmap_notify(struct wl_listener *listener, void *data)
{
return;
struct lab_layer_surface *lab_layer_surface =
wl_container_of(listener, lab_layer_surface, unmap);
unmap(lab_layer_surface);
}
static void
map_notify(struct wl_listener *listener, void *data)
{
return;
struct wlr_layer_surface_v1 *layer_surface = data;
wlr_surface_send_enter(layer_surface->surface, layer_surface->output);
struct lab_layer_surface *layer = wl_container_of(listener, layer, map);
layers_arrange(layer->scene_layer_surface->layer_surface->output->data);
/*
* Since moving to the wlroots scene-graph API, there is no need to
* call wlr_surface_send_enter() from here since that will be done
* automatically based on the position of the surface and outputs in
* the scene. See wlr_scene_surface_create() documentation.
*/
}
static void
@ -323,22 +322,6 @@ new_layer_surface_notify(struct wl_listener *listener, void *data)
struct lab_layer_surface *surface = znew(*surface);
surface->surface_commit.notify = surface_commit_notify;
wl_signal_add(&layer_surface->surface->events.commit,
&surface->surface_commit);
surface->destroy.notify = destroy_notify;
wl_signal_add(&layer_surface->events.destroy, &surface->destroy);
surface->map.notify = map_notify;
wl_signal_add(&layer_surface->events.map, &surface->map);
surface->unmap.notify = unmap_notify;
wl_signal_add(&layer_surface->events.unmap, &surface->unmap);
surface->new_popup.notify = new_popup_notify;
wl_signal_add(&layer_surface->events.new_popup, &surface->new_popup);
struct output *output = layer_surface->output->data;
struct wlr_scene_tree *selected_layer =
@ -358,10 +341,27 @@ new_layer_surface_notify(struct wl_listener *listener, void *data)
surface->server = server;
surface->scene_layer_surface->layer_surface = layer_surface;
surface->surface_commit.notify = surface_commit_notify;
wl_signal_add(&layer_surface->surface->events.commit,
&surface->surface_commit);
surface->map.notify = map_notify;
wl_signal_add(&layer_surface->events.map, &surface->map);
surface->unmap.notify = unmap_notify;
wl_signal_add(&layer_surface->events.unmap, &surface->unmap);
surface->new_popup.notify = new_popup_notify;
wl_signal_add(&layer_surface->events.new_popup, &surface->new_popup);
surface->output_destroy.notify = output_destroy_notify;
wl_signal_add(&layer_surface->output->events.destroy,
&surface->output_destroy);
surface->node_destroy.notify = destroy_notify;
wl_signal_add(&surface->scene_layer_surface->tree->node.events.destroy,
&surface->node_destroy);
if (!output) {
wlr_log(WLR_ERROR, "no output for layer");
return;