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core: split out event code 

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-03-17 13:44:26 +00:00
parent 1b955cabc5
commit 472185e885
No known key found for this signature in database
GPG Key ID: 37C999F617EA1A47
6 changed files with 580 additions and 528 deletions
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535
src/compton.c
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@ -51,9 +51,7 @@
#include "dbus.h" #include "dbus.h"
#endif #endif
#include "options.h" #include "options.h"
#include "event.h"
#define CASESTRRET(s) \
case s: return #s
/// Get session_t pointer from a pointer to a member of session_t /// Get session_t pointer from a pointer to a member of session_t
#define session_ptr(ptr, member) \ #define session_ptr(ptr, member) \
@ -62,28 +60,11 @@
(session_t *)((char *)__mptr - offsetof(session_t, member)); \ (session_t *)((char *)__mptr - offsetof(session_t, member)); \
}) })
static void update_refresh_rate(session_t *ps);
static bool swopti_init(session_t *ps);
static void cxinerama_upd_scrs(session_t *ps);
static void session_destroy(session_t *ps);
static void cxinerama_upd_scrs(session_t *ps);
static bool must_use redir_start(session_t *ps); static bool must_use redir_start(session_t *ps);
static void redir_stop(session_t *ps); static void redir_stop(session_t *ps);
static win *recheck_focus(session_t *ps);
static void restack_win(session_t *ps, win *w, xcb_window_t new_above);
static void update_ewmh_active_win(session_t *ps);
static void draw_callback(EV_P_ ev_idle *w, int revents);
// === Global constants === // === Global constants ===
/// Name strings for window types. /// Name strings for window types.
@ -132,7 +113,7 @@ static inline uint64_t get_time_ms(void) {
} }
// XXX Move to x.c // XXX Move to x.c
static void cxinerama_upd_scrs(session_t *ps) { void cxinerama_upd_scrs(session_t *ps) {
// XXX Consider deprecating Xinerama, switch to RandR when necessary // XXX Consider deprecating Xinerama, switch to RandR when necessary
free_xinerama_info(ps); free_xinerama_info(ps);
@ -271,7 +252,7 @@ static bool run_fade(session_t *ps, win **_w, unsigned steps) {
// === Error handling === // === Error handling ===
static void discard_ignore(session_t *ps, unsigned long sequence) { void discard_ignore(session_t *ps, unsigned long sequence) {
while (ps->ignore_head) { while (ps->ignore_head) {
if (sequence > ps->ignore_head->sequence) { if (sequence > ps->ignore_head->sequence) {
ignore_t *next = ps->ignore_head->next; ignore_t *next = ps->ignore_head->next;
@ -358,7 +339,7 @@ win *find_toplevel2(session_t *ps, xcb_window_t wid) {
* @param ps current session * @param ps current session
* @return struct _win of currently focused window, NULL if not found * @return struct _win of currently focused window, NULL if not found
*/ */
static win *recheck_focus(session_t *ps) { win *recheck_focus(session_t *ps) {
// Use EWMH _NET_ACTIVE_WINDOW if enabled // Use EWMH _NET_ACTIVE_WINDOW if enabled
if (ps->o.use_ewmh_active_win) { if (ps->o.use_ewmh_active_win) {
update_ewmh_active_win(ps); update_ewmh_active_win(ps);
@ -661,45 +642,6 @@ static void rebuild_shadow_exclude_reg(session_t *ps) {
exit(1); exit(1);
} }
static void repair_win(session_t *ps, win *w) {
if (w->a.map_state != XCB_MAP_STATE_VIEWABLE)
return;
region_t parts;
pixman_region32_init(&parts);
if (!w->ever_damaged) {
win_extents(w, &parts);
set_ignore_cookie(
ps, xcb_damage_subtract(ps->c, w->damage, XCB_NONE, XCB_NONE));
} else {
xcb_xfixes_region_t tmp = xcb_generate_id(ps->c);
xcb_xfixes_create_region(ps->c, tmp, 0, NULL);
set_ignore_cookie(ps, xcb_damage_subtract(ps->c, w->damage, XCB_NONE, tmp));
xcb_xfixes_translate_region(ps->c, tmp, w->g.x + w->g.border_width,
w->g.y + w->g.border_width);
x_fetch_region(ps->c, tmp, &parts);
xcb_xfixes_destroy_region(ps->c, tmp);
}
w->ever_damaged = true;
w->pixmap_damaged = true;
// Why care about damage when screen is unredirected?
// We will force full-screen repaint on redirection.
if (!ps->redirected) {
pixman_region32_fini(&parts);
return;
}
// Remove the part in the damage area that could be ignored
if (w->reg_ignore && win_is_region_ignore_valid(ps, w))
pixman_region32_subtract(&parts, &parts, w->reg_ignore);
add_damage(ps, &parts);
pixman_region32_fini(&parts);
}
static void restack_win(session_t *ps, win *w, xcb_window_t new_above) { static void restack_win(session_t *ps, win *w, xcb_window_t new_above) {
xcb_window_t old_above; xcb_window_t old_above;
@ -878,7 +820,7 @@ void configure_win(session_t *ps, xcb_configure_notify_event_t *ce) {
w->a.override_redirect = ce->override_redirect; w->a.override_redirect = ce->override_redirect;
} }
static void circulate_win(session_t *ps, xcb_circulate_notify_event_t *ce) { void circulate_win(session_t *ps, xcb_circulate_notify_event_t *ce) {
win *w = find_win(ps, ce->window); win *w = find_win(ps, ce->window);
xcb_window_t new_above; xcb_window_t new_above;
@ -894,7 +836,7 @@ static void circulate_win(session_t *ps, xcb_circulate_notify_event_t *ce) {
restack_win(ps, w, new_above); restack_win(ps, w, new_above);
} }
static inline void root_damaged(session_t *ps) { void root_damaged(session_t *ps) {
if (ps->root_tile_paint.pixmap) { if (ps->root_tile_paint.pixmap) {
free_root_tile(ps); free_root_tile(ps);
} }
@ -934,11 +876,6 @@ void ev_xcb_error(session_t *ps, xcb_generic_error_t *err) {
x_print_error(err->sequence, err->major_code, err->minor_code, err->error_code); x_print_error(err->sequence, err->major_code, err->minor_code, err->error_code);
} }
static void expose_root(session_t *ps, const rect_t *rects, int nrects) {
region_t region;
pixman_region32_init_rects(&region, rects, nrects);
add_damage(ps, &region);
}
/** /**
* Force a full-screen repaint. * Force a full-screen repaint.
*/ */
@ -1098,37 +1035,6 @@ static inline xcb_window_t attr_unused ev_window(session_t *ps, xcb_generic_even
} }
} }
static inline const char *ev_focus_mode_name(xcb_focus_in_event_t *ev) {
switch (ev->mode) {
CASESTRRET(NotifyNormal);
CASESTRRET(NotifyWhileGrabbed);
CASESTRRET(NotifyGrab);
CASESTRRET(NotifyUngrab);
}
return "Unknown";
}
static inline const char *ev_focus_detail_name(xcb_focus_in_event_t *ev) {
switch (ev->detail) {
CASESTRRET(NotifyAncestor);
CASESTRRET(NotifyVirtual);
CASESTRRET(NotifyInferior);
CASESTRRET(NotifyNonlinear);
CASESTRRET(NotifyNonlinearVirtual);
CASESTRRET(NotifyPointer);
CASESTRRET(NotifyPointerRoot);
CASESTRRET(NotifyDetailNone);
}
return "Unknown";
}
static inline void attr_unused ev_focus_report(xcb_focus_in_event_t *ev) {
log_trace("{ mode: %s, detail: %s }\n", ev_focus_mode_name(ev),
ev_focus_detail_name(ev));
}
// === Events === // === Events ===
/** /**
@ -1142,144 +1048,13 @@ ev_focus_accept(XFocusChangeEvent *ev) {
} }
*/ */
static inline void ev_focus_in(session_t *ps, xcb_focus_in_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
inline static void ev_focus_out(session_t *ps, xcb_focus_out_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
inline static void ev_create_notify(session_t *ps, xcb_create_notify_event_t *ev) {
assert(ev->parent == ps->root);
add_win(ps, ev->window, 0);
}
inline static void ev_configure_notify(session_t *ps, xcb_configure_notify_event_t *ev) {
log_trace("{ send_event: %d, id: %#010x, above: %#010x, override_redirect: %d }",
ev->event, ev->window, ev->above_sibling, ev->override_redirect);
if (ev->window == ps->root) {
configure_root(ps, ev->width, ev->height);
} else {
configure_win(ps, ev);
}
}
inline static void ev_destroy_notify(session_t *ps, xcb_destroy_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
}
inline static void ev_map_notify(session_t *ps, xcb_map_notify_event_t *ev) {
map_win_by_id(ps, ev->window);
// FocusIn/Out may be ignored when the window is unmapped, so we must
// recheck focus here
if (ps->o.track_focus) {
recheck_focus(ps);
}
}
inline static void ev_unmap_notify(session_t *ps, xcb_unmap_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, false);
}
}
inline static void ev_reparent_notify(session_t *ps, xcb_reparent_notify_event_t *ev) {
log_trace("{ new_parent: %#010x, override_redirect: %d }", ev->parent,
ev->override_redirect);
if (ev->parent == ps->root) {
// new window
add_win(ps, ev->window, 0);
} else {
// otherwise, find and destroy the window first
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
// Reset event mask in case something wrong happens
xcb_change_window_attributes(
ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN)});
// Check if the window is an undetected client window
// Firstly, check if it's a known client window
if (!find_toplevel(ps, ev->window)) {
// If not, look for its frame window
win *w_top = find_toplevel2(ps, ev->parent);
// If found, and the client window has not been determined, or its
// frame may not have a correct client, continue
if (w_top && (!w_top->client_win || w_top->client_win == w_top->id)) {
// If it has WM_STATE, mark it the client window
if (wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
// Otherwise, watch for WM_STATE on it
else {
xcb_change_window_attributes(
ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){
determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN) |
XCB_EVENT_MASK_PROPERTY_CHANGE});
}
}
}
}
}
inline static void ev_circulate_notify(session_t *ps, xcb_circulate_notify_event_t *ev) {
circulate_win(ps, ev);
}
inline static void ev_expose(session_t *ps, xcb_expose_event_t *ev) {
if (ev->window == ps->root || (ps->overlay && ev->window == ps->overlay)) {
int more = ev->count + 1;
if (ps->n_expose == ps->size_expose) {
if (ps->expose_rects) {
ps->expose_rects =
crealloc(ps->expose_rects, ps->size_expose + more);
ps->size_expose += more;
} else {
ps->expose_rects = ccalloc(more, rect_t);
ps->size_expose = more;
}
}
ps->expose_rects[ps->n_expose].x1 = ev->x;
ps->expose_rects[ps->n_expose].y1 = ev->y;
ps->expose_rects[ps->n_expose].x2 = ev->x + ev->width;
ps->expose_rects[ps->n_expose].y2 = ev->y + ev->height;
ps->n_expose++;
if (ev->count == 0) {
expose_root(ps, ps->expose_rects, ps->n_expose);
ps->n_expose = 0;
}
}
}
/** /**
* Update current active window based on EWMH _NET_ACTIVE_WIN. * Update current active window based on EWMH _NET_ACTIVE_WIN.
* *
* Does not change anything if we fail to get the attribute or the window * Does not change anything if we fail to get the attribute or the window
* returned could not be found. * returned could not be found.
*/ */
static void update_ewmh_active_win(session_t *ps) { void update_ewmh_active_win(session_t *ps) {
// Search for the window // Search for the window
xcb_window_t wid = wid_get_prop_window(ps, ps->root, ps->atom_ewmh_active_win); xcb_window_t wid = wid_get_prop_window(ps, ps->root, ps->atom_ewmh_active_win);
win *w = find_win_all(ps, wid); win *w = find_win_all(ps, wid);
@ -1289,213 +1064,6 @@ static void update_ewmh_active_win(session_t *ps) {
win_set_focused(ps, w, true); win_set_focused(ps, w, true);
} }
inline static void ev_property_notify(session_t *ps, xcb_property_notify_event_t *ev) {
#ifdef DEBUG_EVENTS
{
// Print out changed atom
xcb_get_atom_name_reply_t *reply =
xcb_get_atom_name_reply(ps->c, xcb_get_atom_name(ps->c, ev->atom), NULL);
const char *name = "?";
int name_len = 1;
if (reply) {
name = xcb_get_atom_name_name(reply);
name_len = xcb_get_atom_name_name_length(reply);
}
log_trace("{ atom = %.*s }", name_len, name);
free(reply);
}
#endif
if (ps->root == ev->window) {
if (ps->o.track_focus && ps->o.use_ewmh_active_win &&
ps->atom_ewmh_active_win == ev->atom) {
update_ewmh_active_win(ps);
} else {
// Destroy the root "image" if the wallpaper probably changed
if (x_is_root_back_pixmap_atom(ps, ev->atom)) {
root_damaged(ps);
}
}
// Unconcerned about any other proprties on root window
return;
}
// If WM_STATE changes
if (ev->atom == ps->atom_client) {
// Check whether it could be a client window
if (!find_toplevel(ps, ev->window)) {
// Reset event mask anyway
xcb_change_window_attributes(ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){determine_evmask(
ps, ev->window, WIN_EVMODE_UNKNOWN)});
win *w_top = find_toplevel2(ps, ev->window);
// Initialize client_win as early as possible
if (w_top && (!w_top->client_win || w_top->client_win == w_top->id) &&
wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
}
}
// If _NET_WM_WINDOW_TYPE changes... God knows why this would happen, but
// there are always some stupid applications. (#144)
if (ev->atom == ps->atom_win_type) {
win *w = NULL;
if ((w = find_toplevel(ps, ev->window)))
win_update_wintype(ps, w);
}
// If _NET_WM_OPACITY changes
if (ev->atom == ps->atom_opacity) {
win *w = find_win(ps, ev->window) ?: find_toplevel(ps, ev->window);
if (w) {
win_update_opacity_prop(ps, w);
// we cannot receive OPACITY change when window is destroyed
assert(w->state != WSTATE_DESTROYING);
if (w->state == WSTATE_MAPPED) {
// See the winstate_t transition table
w->state = WSTATE_FADING;
}
w->opacity_tgt = win_calc_opacity_target(ps, w);
}
}
// If frame extents property changes
if (ps->o.frame_opacity && ev->atom == ps->atom_frame_extents) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_frame_extents(ps, w, ev->window);
// If frame extents change, the window needs repaint
add_damage_from_win(ps, w);
}
}
// If name changes
if (ps->o.track_wdata && (ps->atom_name == ev->atom || ps->atom_name_ewmh == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_name(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If class changes
if (ps->o.track_wdata && ps->atom_class == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_get_class(ps, w);
win_on_factor_change(ps, w);
}
}
// If role changes
if (ps->o.track_wdata && ps->atom_role == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_role(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If _COMPTON_SHADOW changes
if (ps->o.respect_prop_shadow && ps->atom_compton_shadow == ev->atom) {
win *w = find_win(ps, ev->window);
if (w)
win_update_prop_shadow(ps, w);
}
// If a leader property changes
if ((ps->o.detect_transient && ps->atom_transient == ev->atom) ||
(ps->o.detect_client_leader && ps->atom_client_leader == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_leader(ps, w);
}
}
// Check for other atoms we are tracking
for (latom_t *platom = ps->track_atom_lst; platom; platom = platom->next) {
if (platom->atom == ev->atom) {
win *w = find_win(ps, ev->window);
if (!w)
w = find_toplevel(ps, ev->window);
if (w)
win_on_factor_change(ps, w);
break;
}
}
}
inline static void ev_damage_notify(session_t *ps, xcb_damage_notify_event_t *de) {
/*
if (ps->root == de->drawable) {
root_damaged();
return;
} */
win *w = find_win(ps, de->drawable);
if (!w)
return;
repair_win(ps, w);
}
inline static void ev_shape_notify(session_t *ps, xcb_shape_notify_event_t *ev) {
win *w = find_win(ps, ev->affected_window);
if (!w || w->a.map_state == XCB_MAP_STATE_UNMAPPED)
return;
/*
* Empty bounding_shape may indicated an
* unmapped/destroyed window, in which case
* seemingly BadRegion errors would be triggered
* if we attempt to rebuild border_size
*/
// Mark the old border_size as damaged
region_t tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
win_update_bounding_shape(ps, w);
// Mark the new border_size as damaged
tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
w->reg_ignore_valid = false;
}
/**
* Handle ScreenChangeNotify events from X RandR extension.
*/
static void ev_screen_change_notify(session_t *ps,
xcb_randr_screen_change_notify_event_t attr_unused *ev) {
if (ps->o.xinerama_shadow_crop)
cxinerama_upd_scrs(ps);
if (ps->o.sw_opti && !ps->o.refresh_rate) {
update_refresh_rate(ps);
if (!ps->refresh_rate) {
log_warn("Refresh rate detection failed. swopti will be "
"temporarily disabled");
}
}
}
inline static void
ev_selection_clear(session_t *ps, xcb_selection_clear_event_t attr_unused *ev) {
// The only selection we own is the _NET_WM_CM_Sn selection.
// If we lose that one, we should exit.
log_fatal("Another composite manager started and took the _NET_WM_CM_Sn "
"selection.");
exit(1);
}
/** /**
* Get a window's name from window ID. * Get a window's name from window ID.
*/ */
@ -1522,93 +1090,6 @@ static inline void attr_unused ev_window_name(session_t *ps, xcb_window_t wid, c
} }
} }
static void ev_handle(session_t *ps, xcb_generic_event_t *ev) {
if ((ev->response_type & 0x7f) != KeymapNotify) {
discard_ignore(ps, ev->full_sequence);
}
#ifdef DEBUG_EVENTS
if (ev->response_type != ps->damage_event + XCB_DAMAGE_NOTIFY) {
xcb_window_t wid = ev_window(ps, ev);
char *window_name = NULL;
ev_window_name(ps, wid, &window_name);
log_trace("event %10.10s serial %#010x window %#010lx \"%s\"",
ev_name(ps, ev), ev_serial(ev), wid, window_name);
}
#endif
// Check if a custom XEvent constructor was registered in xlib for this event
// type, and call it discarding the constructed XEvent if any. XESetWireToEvent
// might be used by libraries to intercept messages from the X server e.g. the
// OpenGL lib waiting for DRI2 events.
// XXX This exists to workaround compton issue #33, #34, #47
// For even more details, see:
// https://bugs.freedesktop.org/show_bug.cgi?id=35945
// https://lists.freedesktop.org/archives/xcb/2011-November/007337.html
auto proc = XESetWireToEvent(ps->dpy, ev->response_type, 0);
if (proc) {
XESetWireToEvent(ps->dpy, ev->response_type, proc);
XEvent dummy;
// Stop Xlib from complaining about lost sequence numbers.
// proc might also just be Xlib internal event processing functions, and
// because they probably won't see all X replies, they will complain about
// missing sequence numbers.
//
// We only need the low 16 bits
ev->sequence = (uint16_t)(LastKnownRequestProcessed(ps->dpy) & 0xffff);
proc(ps->dpy, &dummy, (xEvent *)ev);
}
// XXX redraw needs to be more fine grained
queue_redraw(ps);
switch (ev->response_type) {
case FocusIn: ev_focus_in(ps, (xcb_focus_in_event_t *)ev); break;
case FocusOut: ev_focus_out(ps, (xcb_focus_out_event_t *)ev); break;
case CreateNotify: ev_create_notify(ps, (xcb_create_notify_event_t *)ev); break;
case ConfigureNotify:
ev_configure_notify(ps, (xcb_configure_notify_event_t *)ev);
break;
case DestroyNotify:
ev_destroy_notify(ps, (xcb_destroy_notify_event_t *)ev);
break;
case MapNotify: ev_map_notify(ps, (xcb_map_notify_event_t *)ev); break;
case UnmapNotify: ev_unmap_notify(ps, (xcb_unmap_notify_event_t *)ev); break;
case ReparentNotify:
ev_reparent_notify(ps, (xcb_reparent_notify_event_t *)ev);
break;
case CirculateNotify:
ev_circulate_notify(ps, (xcb_circulate_notify_event_t *)ev);
break;
case Expose: ev_expose(ps, (xcb_expose_event_t *)ev); break;
case PropertyNotify:
ev_property_notify(ps, (xcb_property_notify_event_t *)ev);
break;
case SelectionClear:
ev_selection_clear(ps, (xcb_selection_clear_event_t *)ev);
break;
case 0: ev_xcb_error(ps, (xcb_generic_error_t *)ev); break;
default:
if (ps->shape_exists && ev->response_type == ps->shape_event) {
ev_shape_notify(ps, (xcb_shape_notify_event_t *)ev);
break;
}
if (ps->randr_exists &&
ev->response_type == (ps->randr_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY)) {
ev_screen_change_notify(
ps, (xcb_randr_screen_change_notify_event_t *)ev);
break;
}
if (ps->damage_event + XCB_DAMAGE_NOTIFY == ev->response_type) {
ev_damage_notify(ps, (xcb_damage_notify_event_t *)ev);
break;
}
}
}
// === Main === // === Main ===
/** /**
@ -1746,7 +1227,7 @@ static void init_atoms(session_t *ps) {
/** /**
* Update refresh rate info with X Randr extension. * Update refresh rate info with X Randr extension.
*/ */
static void update_refresh_rate(session_t *ps) { void update_refresh_rate(session_t *ps) {
xcb_randr_get_screen_info_reply_t *randr_info = xcb_randr_get_screen_info_reply( xcb_randr_get_screen_info_reply_t *randr_info = xcb_randr_get_screen_info_reply(
ps->c, xcb_randr_get_screen_info(ps->c, ps->root), NULL); ps->c, xcb_randr_get_screen_info(ps->c, ps->root), NULL);

22
src/compton.h
View File

@ -40,6 +40,28 @@ xcb_window_t find_client_win(session_t *ps, xcb_window_t w);
win *find_toplevel2(session_t *ps, xcb_window_t wid); win *find_toplevel2(session_t *ps, xcb_window_t wid);
win *recheck_focus(session_t *ps);
/// Handle configure event of a root window
void configure_root(session_t *ps, int width, int height);
/// Handle configure event of a regular window
void configure_win(session_t *ps, xcb_configure_notify_event_t *ce);
void circulate_win(session_t *ps, xcb_circulate_notify_event_t *ce);
void update_ewmh_active_win(session_t *ps);
void update_refresh_rate(session_t *ps);
void root_damaged(session_t *ps);
void cxinerama_upd_scrs(session_t *ps);
void queue_redraw(session_t *ps);
void discard_ignore(session_t *ps, unsigned long sequence);
/** /**
* Set a <code>switch_t</code> array of all unset wintypes to true. * Set a <code>switch_t</code> array of all unset wintypes to true.
*/ */

538
src/event.c Normal file
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@ -0,0 +1,538 @@
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2019, Yuxuan Shui <yshuiv7@gmail.com>
#include <X11/Xlibint.h>
#include "common.h"
#include "compton.h"
#include "event.h"
#include "utils.h"
/// Event handling with X is complicated. Handling events with other events possibly
/// in-flight is no good. Because your internal state won't be up to date. Also, querying
/// the server while events are in-flight is not good. Because events later in the queue
/// might container information you are querying. Thus those events will cause you to do
/// unnecessary updates even when you already have the latest information (remember, you
/// made the query when those events were already in the queue. so the reply you got is
/// more up-to-date than the events). Also, handling events when other client are making
/// concurrent requests is not good. Because the server states are changing without you
/// knowning them. This is super racy, and can cause lots of potential problems.
///
/// All of above mandates we do these things:
/// 1. Grab server when handling events
/// 2. Make sure the event queue is empty before we make any query to the server
///
/// Notice (2) has a dependency circle. To handle events, you sometimes need to make
/// queries. But to make queries you have to first handle events.
///
/// To break that circle, we split all event handling into top and bottom halves. The
/// bottom half will just look at the event itself, update as much state as they can
/// without making queries, then queue up necessary works need to be done by the top half.
/// The top half will do all the other necessary updates. Before entering the top half, we
/// grab the server and make sure the event queue is empty.
///
/// When top half finished, we enter the render stage, where no server state should be
/// queried. All rendering should be done with our internal knowledge of the server state.
///
/// TODO the things described above
static inline const char *ev_focus_mode_name(xcb_focus_in_event_t *ev) {
switch (ev->mode) {
CASESTRRET(NotifyNormal);
CASESTRRET(NotifyWhileGrabbed);
CASESTRRET(NotifyGrab);
CASESTRRET(NotifyUngrab);
}
return "Unknown";
}
static inline const char *ev_focus_detail_name(xcb_focus_in_event_t *ev) {
switch (ev->detail) {
CASESTRRET(NotifyAncestor);
CASESTRRET(NotifyVirtual);
CASESTRRET(NotifyInferior);
CASESTRRET(NotifyNonlinear);
CASESTRRET(NotifyNonlinearVirtual);
CASESTRRET(NotifyPointer);
CASESTRRET(NotifyPointerRoot);
CASESTRRET(NotifyDetailNone);
}
return "Unknown";
}
static inline void attr_unused ev_focus_report(xcb_focus_in_event_t *ev) {
log_trace("{ mode: %s, detail: %s }\n", ev_focus_mode_name(ev),
ev_focus_detail_name(ev));
}
static inline void ev_focus_in(session_t *ps, xcb_focus_in_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
static inline void ev_focus_out(session_t *ps, xcb_focus_out_event_t *ev) {
#ifdef DEBUG_EVENTS
ev_focus_report(ev);
#endif
recheck_focus(ps);
}
static inline void ev_create_notify(session_t *ps, xcb_create_notify_event_t *ev) {
assert(ev->parent == ps->root);
add_win(ps, ev->window, 0);
}
static inline void ev_configure_notify(session_t *ps, xcb_configure_notify_event_t *ev) {
log_trace("{ send_event: %d, id: %#010x, above: %#010x, override_redirect: %d }",
ev->event, ev->window, ev->above_sibling, ev->override_redirect);
if (ev->window == ps->root) {
configure_root(ps, ev->width, ev->height);
} else {
configure_win(ps, ev);
}
}
static inline void ev_destroy_notify(session_t *ps, xcb_destroy_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
}
static inline void ev_map_notify(session_t *ps, xcb_map_notify_event_t *ev) {
map_win_by_id(ps, ev->window);
// FocusIn/Out may be ignored when the window is unmapped, so we must
// recheck focus here
if (ps->o.track_focus) {
recheck_focus(ps);
}
}
static inline void ev_unmap_notify(session_t *ps, xcb_unmap_notify_event_t *ev) {
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, false);
}
}
static inline void ev_reparent_notify(session_t *ps, xcb_reparent_notify_event_t *ev) {
log_trace("{ new_parent: %#010x, override_redirect: %d }", ev->parent,
ev->override_redirect);
if (ev->parent == ps->root) {
// new window
add_win(ps, ev->window, 0);
} else {
// otherwise, find and destroy the window first
win *w = find_win(ps, ev->window);
if (w) {
unmap_win(ps, &w, true);
}
// Reset event mask in case something wrong happens
xcb_change_window_attributes(
ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN)});
// Check if the window is an undetected client window
// Firstly, check if it's a known client window
if (!find_toplevel(ps, ev->window)) {
// If not, look for its frame window
win *w_top = find_toplevel2(ps, ev->parent);
// If found, and the client window has not been determined, or its
// frame may not have a correct client, continue
if (w_top && (!w_top->client_win || w_top->client_win == w_top->id)) {
// If it has WM_STATE, mark it the client window
if (wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
// Otherwise, watch for WM_STATE on it
else {
xcb_change_window_attributes(
ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){
determine_evmask(ps, ev->window, WIN_EVMODE_UNKNOWN) |
XCB_EVENT_MASK_PROPERTY_CHANGE});
}
}
}
}
}
static inline void ev_circulate_notify(session_t *ps, xcb_circulate_notify_event_t *ev) {
circulate_win(ps, ev);
}
static inline void expose_root(session_t *ps, const rect_t *rects, int nrects) {
region_t region;
pixman_region32_init_rects(&region, rects, nrects);
add_damage(ps, &region);
}
static inline void ev_expose(session_t *ps, xcb_expose_event_t *ev) {
if (ev->window == ps->root || (ps->overlay && ev->window == ps->overlay)) {
int more = ev->count + 1;
if (ps->n_expose == ps->size_expose) {
if (ps->expose_rects) {
ps->expose_rects =
crealloc(ps->expose_rects, ps->size_expose + more);
ps->size_expose += more;
} else {
ps->expose_rects = ccalloc(more, rect_t);
ps->size_expose = more;
}
}
ps->expose_rects[ps->n_expose].x1 = ev->x;
ps->expose_rects[ps->n_expose].y1 = ev->y;
ps->expose_rects[ps->n_expose].x2 = ev->x + ev->width;
ps->expose_rects[ps->n_expose].y2 = ev->y + ev->height;
ps->n_expose++;
if (ev->count == 0) {
expose_root(ps, ps->expose_rects, ps->n_expose);
ps->n_expose = 0;
}
}
}
static inline void ev_property_notify(session_t *ps, xcb_property_notify_event_t *ev) {
#ifdef DEBUG_EVENTS
{
// Print out changed atom
xcb_get_atom_name_reply_t *reply =
xcb_get_atom_name_reply(ps->c, xcb_get_atom_name(ps->c, ev->atom), NULL);
const char *name = "?";
int name_len = 1;
if (reply) {
name = xcb_get_atom_name_name(reply);
name_len = xcb_get_atom_name_name_length(reply);
}
log_trace("{ atom = %.*s }", name_len, name);
free(reply);
}
#endif
if (ps->root == ev->window) {
if (ps->o.track_focus && ps->o.use_ewmh_active_win &&
ps->atom_ewmh_active_win == ev->atom) {
update_ewmh_active_win(ps);
} else {
// Destroy the root "image" if the wallpaper probably changed
if (x_is_root_back_pixmap_atom(ps, ev->atom)) {
root_damaged(ps);
}
}
// Unconcerned about any other proprties on root window
return;
}
// If WM_STATE changes
if (ev->atom == ps->atom_client) {
// Check whether it could be a client window
if (!find_toplevel(ps, ev->window)) {
// Reset event mask anyway
xcb_change_window_attributes(ps->c, ev->window, XCB_CW_EVENT_MASK,
(const uint32_t[]){determine_evmask(
ps, ev->window, WIN_EVMODE_UNKNOWN)});
win *w_top = find_toplevel2(ps, ev->window);
// Initialize client_win as early as possible
if (w_top && (!w_top->client_win || w_top->client_win == w_top->id) &&
wid_has_prop(ps, ev->window, ps->atom_client)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
}
}
}
// If _NET_WM_WINDOW_TYPE changes... God knows why this would happen, but
// there are always some stupid applications. (#144)
if (ev->atom == ps->atom_win_type) {
win *w = NULL;
if ((w = find_toplevel(ps, ev->window)))
win_update_wintype(ps, w);
}
// If _NET_WM_OPACITY changes
if (ev->atom == ps->atom_opacity) {
win *w = find_win(ps, ev->window) ?: find_toplevel(ps, ev->window);
if (w) {
win_update_opacity_prop(ps, w);
// we cannot receive OPACITY change when window is destroyed
assert(w->state != WSTATE_DESTROYING);
if (w->state == WSTATE_MAPPED) {
// See the winstate_t transition table
w->state = WSTATE_FADING;
}
w->opacity_tgt = win_calc_opacity_target(ps, w);
}
}
// If frame extents property changes
if (ps->o.frame_opacity && ev->atom == ps->atom_frame_extents) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_frame_extents(ps, w, ev->window);
// If frame extents change, the window needs repaint
add_damage_from_win(ps, w);
}
}
// If name changes
if (ps->o.track_wdata && (ps->atom_name == ev->atom || ps->atom_name_ewmh == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_name(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If class changes
if (ps->o.track_wdata && ps->atom_class == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_get_class(ps, w);
win_on_factor_change(ps, w);
}
}
// If role changes
if (ps->o.track_wdata && ps->atom_role == ev->atom) {
win *w = find_toplevel(ps, ev->window);
if (w && 1 == win_get_role(ps, w)) {
win_on_factor_change(ps, w);
}
}
// If _COMPTON_SHADOW changes
if (ps->o.respect_prop_shadow && ps->atom_compton_shadow == ev->atom) {
win *w = find_win(ps, ev->window);
if (w)
win_update_prop_shadow(ps, w);
}
// If a leader property changes
if ((ps->o.detect_transient && ps->atom_transient == ev->atom) ||
(ps->o.detect_client_leader && ps->atom_client_leader == ev->atom)) {
win *w = find_toplevel(ps, ev->window);
if (w) {
win_update_leader(ps, w);
}
}
// Check for other atoms we are tracking
for (latom_t *platom = ps->track_atom_lst; platom; platom = platom->next) {
if (platom->atom == ev->atom) {
win *w = find_win(ps, ev->window);
if (!w)
w = find_toplevel(ps, ev->window);
if (w)
win_on_factor_change(ps, w);
break;
}
}
}
static inline void repair_win(session_t *ps, win *w) {
if (w->a.map_state != XCB_MAP_STATE_VIEWABLE)
return;
region_t parts;
pixman_region32_init(&parts);
if (!w->ever_damaged) {
win_extents(w, &parts);
set_ignore_cookie(
ps, xcb_damage_subtract(ps->c, w->damage, XCB_NONE, XCB_NONE));
} else {
xcb_xfixes_region_t tmp = xcb_generate_id(ps->c);
xcb_xfixes_create_region(ps->c, tmp, 0, NULL);
set_ignore_cookie(ps, xcb_damage_subtract(ps->c, w->damage, XCB_NONE, tmp));
xcb_xfixes_translate_region(ps->c, tmp, w->g.x + w->g.border_width,
w->g.y + w->g.border_width);
x_fetch_region(ps->c, tmp, &parts);
xcb_xfixes_destroy_region(ps->c, tmp);
}
w->ever_damaged = true;
w->pixmap_damaged = true;
// Why care about damage when screen is unredirected?
// We will force full-screen repaint on redirection.
if (!ps->redirected) {
pixman_region32_fini(&parts);
return;
}
// Remove the part in the damage area that could be ignored
if (w->reg_ignore && win_is_region_ignore_valid(ps, w))
pixman_region32_subtract(&parts, &parts, w->reg_ignore);
add_damage(ps, &parts);
pixman_region32_fini(&parts);
}
static inline void ev_damage_notify(session_t *ps, xcb_damage_notify_event_t *de) {
/*
if (ps->root == de->drawable) {
root_damaged();
return;
} */
win *w = find_win(ps, de->drawable);
if (!w)
return;
repair_win(ps, w);
}
static inline void ev_shape_notify(session_t *ps, xcb_shape_notify_event_t *ev) {
win *w = find_win(ps, ev->affected_window);
if (!w || w->a.map_state == XCB_MAP_STATE_UNMAPPED)
return;
/*
* Empty bounding_shape may indicated an
* unmapped/destroyed window, in which case
* seemingly BadRegion errors would be triggered
* if we attempt to rebuild border_size
*/
// Mark the old border_size as damaged
region_t tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
win_update_bounding_shape(ps, w);
// Mark the new border_size as damaged
tmp = win_get_bounding_shape_global_by_val(w);
add_damage(ps, &tmp);
pixman_region32_fini(&tmp);
w->reg_ignore_valid = false;
}
/**
* Handle ScreenChangeNotify events from X RandR extension.
*/
static void ev_screen_change_notify(session_t *ps,
xcb_randr_screen_change_notify_event_t attr_unused *ev) {
if (ps->o.xinerama_shadow_crop)
cxinerama_upd_scrs(ps);
if (ps->o.sw_opti && !ps->o.refresh_rate) {
update_refresh_rate(ps);
if (!ps->refresh_rate) {
log_warn("Refresh rate detection failed. swopti will be "
"temporarily disabled");
}
}
}
static inline void
ev_selection_clear(session_t *ps, xcb_selection_clear_event_t attr_unused *ev) {
// The only selection we own is the _NET_WM_CM_Sn selection.
// If we lose that one, we should exit.
log_fatal("Another composite manager started and took the _NET_WM_CM_Sn "
"selection.");
exit(1);
}
void ev_handle(session_t *ps, xcb_generic_event_t *ev) {
if ((ev->response_type & 0x7f) != KeymapNotify) {
discard_ignore(ps, ev->full_sequence);
}
#ifdef DEBUG_EVENTS
if (ev->response_type != ps->damage_event + XCB_DAMAGE_NOTIFY) {
xcb_window_t wid = ev_window(ps, ev);
char *window_name = NULL;
ev_window_name(ps, wid, &window_name);
log_trace("event %10.10s serial %#010x window %#010lx \"%s\"",
ev_name(ps, ev), ev_serial(ev), wid, window_name);
}
#endif
// Check if a custom XEvent constructor was registered in xlib for this event
// type, and call it discarding the constructed XEvent if any. XESetWireToEvent
// might be used by libraries to intercept messages from the X server e.g. the
// OpenGL lib waiting for DRI2 events.
// XXX This exists to workaround compton issue #33, #34, #47
// For even more details, see:
// https://bugs.freedesktop.org/show_bug.cgi?id=35945
// https://lists.freedesktop.org/archives/xcb/2011-November/007337.html
auto proc = XESetWireToEvent(ps->dpy, ev->response_type, 0);
if (proc) {
XESetWireToEvent(ps->dpy, ev->response_type, proc);
XEvent dummy;
// Stop Xlib from complaining about lost sequence numbers.
// proc might also just be Xlib internal event processing functions, and
// because they probably won't see all X replies, they will complain about
// missing sequence numbers.
//
// We only need the low 16 bits
ev->sequence = (uint16_t)(LastKnownRequestProcessed(ps->dpy) & 0xffff);
proc(ps->dpy, &dummy, (xEvent *)ev);
}
// XXX redraw needs to be more fine grained
queue_redraw(ps);
switch (ev->response_type) {
case FocusIn: ev_focus_in(ps, (xcb_focus_in_event_t *)ev); break;
case FocusOut: ev_focus_out(ps, (xcb_focus_out_event_t *)ev); break;
case CreateNotify: ev_create_notify(ps, (xcb_create_notify_event_t *)ev); break;
case ConfigureNotify:
ev_configure_notify(ps, (xcb_configure_notify_event_t *)ev);
break;
case DestroyNotify:
ev_destroy_notify(ps, (xcb_destroy_notify_event_t *)ev);
break;
case MapNotify: ev_map_notify(ps, (xcb_map_notify_event_t *)ev); break;
case UnmapNotify: ev_unmap_notify(ps, (xcb_unmap_notify_event_t *)ev); break;
case ReparentNotify:
ev_reparent_notify(ps, (xcb_reparent_notify_event_t *)ev);
break;
case CirculateNotify:
ev_circulate_notify(ps, (xcb_circulate_notify_event_t *)ev);
break;
case Expose: ev_expose(ps, (xcb_expose_event_t *)ev); break;
case PropertyNotify:
ev_property_notify(ps, (xcb_property_notify_event_t *)ev);
break;
case SelectionClear:
ev_selection_clear(ps, (xcb_selection_clear_event_t *)ev);
break;
case 0: ev_xcb_error(ps, (xcb_generic_error_t *)ev); break;
default:
if (ps->shape_exists && ev->response_type == ps->shape_event) {
ev_shape_notify(ps, (xcb_shape_notify_event_t *)ev);
break;
}
if (ps->randr_exists &&
ev->response_type == (ps->randr_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY)) {
ev_screen_change_notify(
ps, (xcb_randr_screen_change_notify_event_t *)ev);
break;
}
if (ps->damage_event + XCB_DAMAGE_NOTIFY == ev->response_type) {
ev_damage_notify(ps, (xcb_damage_notify_event_t *)ev);
break;
}
}
}

8
src/event.h Normal file
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@ -0,0 +1,8 @@
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2019, Yuxuan Shui <yshuiv7@gmail.com>
#include <xcb/xcb.h>
#include "common.h"
void ev_handle(session_t *ps, xcb_generic_event_t *ev);

2
src/meson.build
View File

@ -6,7 +6,7 @@ base_deps = [
srcs = [ files('compton.c', 'win.c', 'c2.c', 'x.c', 'config.c', 'vsync.c', 'utils.c', srcs = [ files('compton.c', 'win.c', 'c2.c', 'x.c', 'config.c', 'vsync.c', 'utils.c',
'diagnostic.c', 'string_utils.c', 'render.c', 'kernel.c', 'log.c', 'diagnostic.c', 'string_utils.c', 'render.c', 'kernel.c', 'log.c',
'options.c') ] 'options.c', 'event.c') ]
compton_inc = include_directories('.') compton_inc = include_directories('.')
cflags = [] cflags = []

3
src/utils.h
View File

@ -30,6 +30,9 @@ safe_isnan(double a) {
return isnan(a); return isnan(a);
} }
#define CASESTRRET(s) \
case s: return #s
/// Same as assert false, but make sure we abort _even in release builds_. /// Same as assert false, but make sure we abort _even in release builds_.
/// Silence compiler warning caused by release builds making some code paths reachable. /// Silence compiler warning caused by release builds making some code paths reachable.
#define BUG() \ #define BUG() \