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Make drag_icon a persistent scene node

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If there is no current drag icon, this node will be empty, but we now
have `drag_icon != NULL` as an invariant.  This allows us to eliminate a
conditional, since there's no harm in moving an empty node's coordinates
around with the pointer.

ΔSLOC: -1
This commit is contained in:
Devin J. Pohly
2023-07-13 16:22:50 -05:00
committed by Leonardo Hernández
parent 1841527871
commit 831fc36bc9
1 changed files with 7 additions and 7 deletions
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14
dwl.c
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@@ -331,6 +331,7 @@ static struct wl_event_source *sighandler[4];
static struct wlr_backend *backend;
static struct wlr_scene *scene;
static struct wlr_scene_tree *layers[NUM_LAYERS];
static struct wlr_scene_tree *drag_icon;
/* Map from ZWLR_LAYER_SHELL_* constants to Lyr* enum */
static const int layermap[] = { LyrBg, LyrBottom, LyrTop, LyrOverlay };
static struct wlr_renderer *drw;
@@ -1663,7 +1664,6 @@ motionnotify(uint32_t time)
LayerSurface *l = NULL;
int type;
struct wlr_surface *surface = NULL;
struct wlr_drag_icon *icon;
/* time is 0 in internal calls meant to restore pointer focus. */
if (time) {
@@ -1674,10 +1674,9 @@ motionnotify(uint32_t time)
selmon = xytomon(cursor->x, cursor->y);
}
/* Update drag icon's position if any */
if (seat->drag && (icon = seat->drag->icon))
wlr_scene_node_set_position(icon->data, cursor->x + icon->surface->sx,
cursor->y + icon->surface->sy);
/* Update drag icon's position */
wlr_scene_node_set_position(&drag_icon->node, cursor->x, cursor->y);
/* If we are currently grabbing the mouse, handle and return */
if (cursor_mode == CurMove) {
/* Move the grabbed client to the new position. */
@@ -2167,6 +2166,8 @@ setup(void)
scene = wlr_scene_create();
for (i = 0; i < NUM_LAYERS; i++)
layers[i] = wlr_scene_tree_create(&scene->tree);
drag_icon = wlr_scene_tree_create(&scene->tree);
wlr_scene_node_place_below(&drag_icon->node, &layers[LyrBlock]->node);
/* Create a renderer with the default implementation */
if (!(drw = wlr_renderer_autocreate(backend)))
@@ -2338,8 +2339,7 @@ startdrag(struct wl_listener *listener, void *data)
if (!drag->icon)
return;
drag->icon->data = icon = wlr_scene_subsurface_tree_create(&scene->tree, drag->icon->surface);
wlr_scene_node_place_below(&icon->node, &layers[LyrBlock]->node);
drag->icon->data = icon = wlr_scene_subsurface_tree_create(drag_icon, drag->icon->surface);
motionnotify(0);
wl_signal_add(&drag->icon->events.destroy, &drag_icon_destroy);
}