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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duration [1], so the listener was no longer valid after setup()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 END(A) ((A) + LENGTH(A))
#define TAGMASK ((1u << tagcount) - 1) #define TAGMASK ((1u << tagcount) - 1)
#define LISTEN(E, L, H) wl_signal_add((E), ((L)->notify = (H), (L))) #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 */ /* enums */
enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */ 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_session_lock_manager_v1 *session_lock_mgr;
static struct wlr_scene_rect *locked_bg; static struct wlr_scene_rect *locked_bg;
static struct wlr_session_lock_v1 *cur_lock; static struct wlr_session_lock_v1 *cur_lock;
static struct wl_listener lock_listener = {.notify = locksession};
static struct wlr_seat *seat; static struct wlr_seat *seat;
static struct wl_list keyboards; static struct wl_list keyboards;
@ -371,34 +373,6 @@ static struct wlr_box sgeom;
static struct wl_list mons; static struct wl_list mons;
static Monitor *selmon; 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 #ifdef XWAYLAND
static void activatex11(struct wl_listener *listener, void *data); static void activatex11(struct wl_listener *listener, void *data);
static void associatex11(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 Atom getatom(xcb_connection_t *xc, const char *name);
static void sethints(struct wl_listener *listener, void *data); static void sethints(struct wl_listener *listener, void *data);
static void xwaylandready(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 struct wlr_xwayland *xwayland;
static Atom netatom[NetLast]; static Atom netatom[NetLast];
#endif #endif
@ -794,7 +766,7 @@ void
createidleinhibitor(struct wl_listener *listener, void *data) createidleinhibitor(struct wl_listener *listener, void *data)
{ {
struct wlr_idle_inhibitor_v1 *idle_inhibitor = 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); checkidleinhibitor(NULL);
} }
@ -1185,8 +1157,8 @@ destroysessionlock(struct wl_listener *listener, void *data)
void void
destroysessionmgr(struct wl_listener *listener, void *data) destroysessionmgr(struct wl_listener *listener, void *data)
{ {
wl_list_remove(&session_lock_create_lock.link); wl_list_remove(&lock_listener.link);
wl_list_remove(&session_lock_mgr_destroy.link); wl_list_remove(&listener->link);
} }
Monitor * Monitor *
@ -2224,21 +2196,21 @@ setup(void)
/* Initializes the interface used to implement urgency hints */ /* Initializes the interface used to implement urgency hints */
activation = wlr_xdg_activation_v1_create(dpy); 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); 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 /* Creates an output layout, which a wlroots utility for working with an
* arrangement of screens in a physical layout. */ * arrangement of screens in a physical layout. */
output_layout = wlr_output_layout_create(); 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); wlr_xdg_output_manager_v1_create(dpy, output_layout);
/* Configure a listener to be notified when new outputs are available on the /* Configure a listener to be notified when new outputs are available on the
* backend. */ * backend. */
wl_list_init(&mons); 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 /* Set up our client lists and the xdg-shell. The xdg-shell is a
* Wayland protocol which is used for application windows. For more * 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_notifier = wlr_idle_notifier_v1_create(dpy);
idle_inhibit_mgr = wlr_idle_inhibit_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); 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); 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); 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.new_lock, &lock_listener);
wl_signal_add(&session_lock_mgr->events.destroy, &session_lock_mgr_destroy); LISTEN_STATIC(&session_lock_mgr->events.destroy, destroysessionmgr);
locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height, locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height,
(float [4]){0.1, 0.1, 0.1, 1.0}); (float [4]){0.1, 0.1, 0.1, 1.0});
wlr_scene_node_set_enabled(&locked_bg->node, 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_create(dpy),
WLR_SERVER_DECORATION_MANAGER_MODE_SERVER); WLR_SERVER_DECORATION_MANAGER_MODE_SERVER);
xdg_decoration_mgr = wlr_xdg_decoration_manager_v1_create(dpy); 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 * 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. * And more comments are sprinkled throughout the notify functions above.
*/ */
wl_signal_add(&cursor->events.motion, &cursor_motion); LISTEN_STATIC(&cursor->events.motion, motionrelative);
wl_signal_add(&cursor->events.motion_absolute, &cursor_motion_absolute); LISTEN_STATIC(&cursor->events.motion_absolute, motionabsolute);
wl_signal_add(&cursor->events.button, &cursor_button); LISTEN_STATIC(&cursor->events.button, buttonpress);
wl_signal_add(&cursor->events.axis, &cursor_axis); LISTEN_STATIC(&cursor->events.axis, axisnotify);
wl_signal_add(&cursor->events.frame, &cursor_frame); LISTEN_STATIC(&cursor->events.frame, cursorframe);
/* /*
* Configures a seat, which is a single "seat" at which a user sits and * 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. * let us know when new input devices are available on the backend.
*/ */
wl_list_init(&keyboards); 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); virtual_keyboard_mgr = wlr_virtual_keyboard_manager_v1_create(dpy);
wl_signal_add(&virtual_keyboard_mgr->events.new_virtual_keyboard, LISTEN_STATIC(&virtual_keyboard_mgr->events.new_virtual_keyboard, virtualkeyboard);
&new_virtual_keyboard);
seat = wlr_seat_create(dpy, "seat0"); seat = wlr_seat_create(dpy, "seat0");
wl_signal_add(&seat->events.request_set_cursor, &request_cursor); LISTEN_STATIC(&seat->events.request_set_cursor, setcursor);
wl_signal_add(&seat->events.request_set_selection, &request_set_sel); LISTEN_STATIC(&seat->events.request_set_selection, setsel);
wl_signal_add(&seat->events.request_set_primary_selection, &request_set_psel); LISTEN_STATIC(&seat->events.request_set_primary_selection, setpsel);
wl_signal_add(&seat->events.request_start_drag, &request_start_drag); LISTEN_STATIC(&seat->events.request_start_drag, requeststartdrag);
wl_signal_add(&seat->events.start_drag, &start_drag); LISTEN_STATIC(&seat->events.start_drag, startdrag);
output_mgr = wlr_output_manager_v1_create(dpy); output_mgr = wlr_output_manager_v1_create(dpy);
wl_signal_add(&output_mgr->events.apply, &output_mgr_apply); LISTEN_STATIC(&output_mgr->events.apply, outputmgrapply);
wl_signal_add(&output_mgr->events.test, &output_mgr_test); LISTEN_STATIC(&output_mgr->events.test, outputmgrtest);
wlr_scene_set_presentation(scene, wlr_presentation_create(dpy, backend)); wlr_scene_set_presentation(scene, wlr_presentation_create(dpy, backend));
@ -2337,8 +2308,8 @@ setup(void)
*/ */
xwayland = wlr_xwayland_create(dpy, compositor, 1); xwayland = wlr_xwayland_create(dpy, compositor, 1);
if (xwayland) { if (xwayland) {
wl_signal_add(&xwayland->events.ready, &xwayland_ready); LISTEN_STATIC(&xwayland->events.ready, xwaylandready);
wl_signal_add(&xwayland->events.new_surface, &new_xwayland_surface); LISTEN_STATIC(&xwayland->events.new_surface, createnotifyx11);
setenv("DISPLAY", xwayland->display_name, 1); setenv("DISPLAY", xwayland->display_name, 1);
} else { } 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); icon = drag->icon->data = wlr_scene_drag_icon_create(&scene->tree, drag->icon);
wlr_scene_node_place_below(&icon->node, &layers[LyrBlock]->node); wlr_scene_node_place_below(&icon->node, &layers[LyrBlock]->node);
motionnotify(0); motionnotify(0);
wl_signal_add(&drag->icon->events.destroy, &drag_icon_destroy); LISTEN_STATIC(&drag->icon->events.destroy, destroydragicon);
} }
void void