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Line saver: LISTEN_STATIC macro

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This parallels the LISTEN macro for statically allocated listeners, and
it allows us to remove almost all of the global wl_listener
declarations.

This also fixes a bug with the axisnotify listener, which was declared
with a compound literal.  At block scope, these have automatic storage
duration [1], so the listener was no longer valid after setup()
returned.  (The option to declare it static explicitly was standardized
in C23, if that ever gains suckless traction.)

ΔSLOC: -27

[1]: https://en.cppreference.com/w/c/language/compound_literal#Explanation
This commit is contained in:
Devin J. Pohly
2023-07-03 17:35:44 -05:00
committed by Leonardo Hernández
parent a01e402c5d
commit 33bcd2e4ca
1 changed files with 32 additions and 61 deletions
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93
dwl.c
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@@ -70,6 +70,7 @@
#define END(A) ((A) + LENGTH(A))
#define TAGMASK ((1u << tagcount) - 1)
#define LISTEN(E, L, H) wl_signal_add((E), ((L)->notify = (H), (L)))
#define LISTEN_STATIC(E, H) do { static struct wl_listener _l = {.notify = (H)}; wl_signal_add((E), &_l); } while (0)
/* enums */
enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
@@ -359,6 +360,7 @@ static struct wlr_xcursor_manager *cursor_mgr;
static struct wlr_session_lock_manager_v1 *session_lock_mgr;
static struct wlr_scene_rect *locked_bg;
static struct wlr_session_lock_v1 *cur_lock;
static struct wl_listener lock_listener = {.notify = locksession};
static struct wlr_seat *seat;
static struct wl_list keyboards;
@@ -371,34 +373,6 @@ static struct wlr_box sgeom;
static struct wl_list mons;
static Monitor *selmon;
/* global event handlers */
static struct wl_listener cursor_axis = {.notify = axisnotify};
static struct wl_listener cursor_button = {.notify = buttonpress};
static struct wl_listener cursor_frame = {.notify = cursorframe};
static struct wl_listener cursor_motion = {.notify = motionrelative};
static struct wl_listener cursor_motion_absolute = {.notify = motionabsolute};
static struct wl_listener drag_icon_destroy = {.notify = destroydragicon};
static struct wl_listener idle_inhibitor_create = {.notify = createidleinhibitor};
static struct wl_listener idle_inhibitor_destroy = {.notify = destroyidleinhibitor};
static struct wl_listener layout_change = {.notify = updatemons};
static struct wl_listener new_input = {.notify = inputdevice};
static struct wl_listener new_virtual_keyboard = {.notify = virtualkeyboard};
static struct wl_listener new_output = {.notify = createmon};
static struct wl_listener new_xdg_surface = {.notify = createnotify};
static struct wl_listener new_xdg_decoration = {.notify = createdecoration};
static struct wl_listener new_layer_shell_surface = {.notify = createlayersurface};
static struct wl_listener output_mgr_apply = {.notify = outputmgrapply};
static struct wl_listener output_mgr_test = {.notify = outputmgrtest};
static struct wl_listener request_activate = {.notify = urgent};
static struct wl_listener request_cursor = {.notify = setcursor};
static struct wl_listener request_gamma = {.notify = setgamma};
static struct wl_listener request_set_psel = {.notify = setpsel};
static struct wl_listener request_set_sel = {.notify = setsel};
static struct wl_listener request_start_drag = {.notify = requeststartdrag};
static struct wl_listener start_drag = {.notify = startdrag};
static struct wl_listener session_lock_create_lock = {.notify = locksession};
static struct wl_listener session_lock_mgr_destroy = {.notify = destroysessionmgr};
#ifdef XWAYLAND
static void activatex11(struct wl_listener *listener, void *data);
static void associatex11(struct wl_listener *listener, void *data);
@@ -408,8 +382,6 @@ static void dissociatex11(struct wl_listener *listener, void *data);
static Atom getatom(xcb_connection_t *xc, const char *name);
static void sethints(struct wl_listener *listener, void *data);
static void xwaylandready(struct wl_listener *listener, void *data);
static struct wl_listener new_xwayland_surface = {.notify = createnotifyx11};
static struct wl_listener xwayland_ready = {.notify = xwaylandready};
static struct wlr_xwayland *xwayland;
static Atom netatom[NetLast];
#endif
@@ -794,7 +766,7 @@ void
createidleinhibitor(struct wl_listener *listener, void *data)
{
struct wlr_idle_inhibitor_v1 *idle_inhibitor = data;
wl_signal_add(&idle_inhibitor->events.destroy, &idle_inhibitor_destroy);
LISTEN_STATIC(&idle_inhibitor->events.destroy, destroyidleinhibitor);
checkidleinhibitor(NULL);
}
@@ -1185,8 +1157,8 @@ destroysessionlock(struct wl_listener *listener, void *data)
void
destroysessionmgr(struct wl_listener *listener, void *data)
{
wl_list_remove(&session_lock_create_lock.link);
wl_list_remove(&session_lock_mgr_destroy.link);
wl_list_remove(&lock_listener.link);
wl_list_remove(&listener->link);
}
Monitor *
@@ -2224,21 +2196,21 @@ setup(void)
/* Initializes the interface used to implement urgency hints */
activation = wlr_xdg_activation_v1_create(dpy);
wl_signal_add(&activation->events.request_activate, &request_activate);
LISTEN_STATIC(&activation->events.request_activate, urgent);
gamma_control_mgr = wlr_gamma_control_manager_v1_create(dpy);
wl_signal_add(&gamma_control_mgr->events.set_gamma, &request_gamma);
LISTEN_STATIC(&gamma_control_mgr->events.set_gamma, setgamma);
/* Creates an output layout, which a wlroots utility for working with an
* arrangement of screens in a physical layout. */
output_layout = wlr_output_layout_create();
wl_signal_add(&output_layout->events.change, &layout_change);
LISTEN_STATIC(&output_layout->events.change, updatemons);
wlr_xdg_output_manager_v1_create(dpy, output_layout);
/* Configure a listener to be notified when new outputs are available on the
* backend. */
wl_list_init(&mons);
wl_signal_add(&backend->events.new_output, &new_output);
LISTEN_STATIC(&backend->events.new_output, createmon);
/* Set up our client lists and the xdg-shell. The xdg-shell is a
* Wayland protocol which is used for application windows. For more
@@ -2252,17 +2224,17 @@ setup(void)
idle_notifier = wlr_idle_notifier_v1_create(dpy);
idle_inhibit_mgr = wlr_idle_inhibit_v1_create(dpy);
wl_signal_add(&idle_inhibit_mgr->events.new_inhibitor, &idle_inhibitor_create);
LISTEN_STATIC(&idle_inhibit_mgr->events.new_inhibitor, createidleinhibitor);
layer_shell = wlr_layer_shell_v1_create(dpy, 3);
wl_signal_add(&layer_shell->events.new_surface, &new_layer_shell_surface);
LISTEN_STATIC(&layer_shell->events.new_surface, createlayersurface);
xdg_shell = wlr_xdg_shell_create(dpy, 4);
wl_signal_add(&xdg_shell->events.new_surface, &new_xdg_surface);
LISTEN_STATIC(&xdg_shell->events.new_surface, createnotify);
session_lock_mgr = wlr_session_lock_manager_v1_create(dpy);
wl_signal_add(&session_lock_mgr->events.new_lock, &session_lock_create_lock);
wl_signal_add(&session_lock_mgr->events.destroy, &session_lock_mgr_destroy);
wl_signal_add(&session_lock_mgr->events.new_lock, &lock_listener);
LISTEN_STATIC(&session_lock_mgr->events.destroy, destroysessionmgr);
locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height,
(float [4]){0.1, 0.1, 0.1, 1.0});
wlr_scene_node_set_enabled(&locked_bg->node, 0);
@@ -2272,7 +2244,7 @@ setup(void)
wlr_server_decoration_manager_create(dpy),
WLR_SERVER_DECORATION_MANAGER_MODE_SERVER);
xdg_decoration_mgr = wlr_xdg_decoration_manager_v1_create(dpy);
wl_signal_add(&xdg_decoration_mgr->events.new_toplevel_decoration, &new_xdg_decoration);
LISTEN_STATIC(&xdg_decoration_mgr->events.new_toplevel_decoration, createdecoration);
/*
* Creates a cursor, which is a wlroots utility for tracking the cursor
@@ -2300,11 +2272,11 @@ setup(void)
*
* And more comments are sprinkled throughout the notify functions above.
*/
wl_signal_add(&cursor->events.motion, &cursor_motion);
wl_signal_add(&cursor->events.motion_absolute, &cursor_motion_absolute);
wl_signal_add(&cursor->events.button, &cursor_button);
wl_signal_add(&cursor->events.axis, &cursor_axis);
wl_signal_add(&cursor->events.frame, &cursor_frame);
LISTEN_STATIC(&cursor->events.motion, motionrelative);
LISTEN_STATIC(&cursor->events.motion_absolute, motionabsolute);
LISTEN_STATIC(&cursor->events.button, buttonpress);
LISTEN_STATIC(&cursor->events.axis, axisnotify);
LISTEN_STATIC(&cursor->events.frame, cursorframe);
/*
* Configures a seat, which is a single "seat" at which a user sits and
@@ -2313,20 +2285,19 @@ setup(void)
* let us know when new input devices are available on the backend.
*/
wl_list_init(&keyboards);
wl_signal_add(&backend->events.new_input, &new_input);
LISTEN_STATIC(&backend->events.new_input, inputdevice);
virtual_keyboard_mgr = wlr_virtual_keyboard_manager_v1_create(dpy);
wl_signal_add(&virtual_keyboard_mgr->events.new_virtual_keyboard,
&new_virtual_keyboard);
LISTEN_STATIC(&virtual_keyboard_mgr->events.new_virtual_keyboard, virtualkeyboard);
seat = wlr_seat_create(dpy, "seat0");
wl_signal_add(&seat->events.request_set_cursor, &request_cursor);
wl_signal_add(&seat->events.request_set_selection, &request_set_sel);
wl_signal_add(&seat->events.request_set_primary_selection, &request_set_psel);
wl_signal_add(&seat->events.request_start_drag, &request_start_drag);
wl_signal_add(&seat->events.start_drag, &start_drag);
LISTEN_STATIC(&seat->events.request_set_cursor, setcursor);
LISTEN_STATIC(&seat->events.request_set_selection, setsel);
LISTEN_STATIC(&seat->events.request_set_primary_selection, setpsel);
LISTEN_STATIC(&seat->events.request_start_drag, requeststartdrag);
LISTEN_STATIC(&seat->events.start_drag, startdrag);
output_mgr = wlr_output_manager_v1_create(dpy);
wl_signal_add(&output_mgr->events.apply, &output_mgr_apply);
wl_signal_add(&output_mgr->events.test, &output_mgr_test);
LISTEN_STATIC(&output_mgr->events.apply, outputmgrapply);
LISTEN_STATIC(&output_mgr->events.test, outputmgrtest);
wlr_scene_set_presentation(scene, wlr_presentation_create(dpy, backend));
@@ -2337,8 +2308,8 @@ setup(void)
*/
xwayland = wlr_xwayland_create(dpy, compositor, 1);
if (xwayland) {
wl_signal_add(&xwayland->events.ready, &xwayland_ready);
wl_signal_add(&xwayland->events.new_surface, &new_xwayland_surface);
LISTEN_STATIC(&xwayland->events.ready, xwaylandready);
LISTEN_STATIC(&xwayland->events.new_surface, createnotifyx11);
setenv("DISPLAY", xwayland->display_name, 1);
} else {
@@ -2392,7 +2363,7 @@ startdrag(struct wl_listener *listener, void *data)
icon = drag->icon->data = wlr_scene_drag_icon_create(&scene->tree, drag->icon);
wlr_scene_node_place_below(&icon->node, &layers[LyrBlock]->node);
motionnotify(0);
wl_signal_add(&drag->icon->events.destroy, &drag_icon_destroy);
LISTEN_STATIC(&drag->icon->events.destroy, destroydragicon);
}
void