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win, event: delayed handling of reparent notify 

Instead of handling reparent notify on the spot by updating the client
windows, setup a flag on the window and call win_recheck_client later.

This makes handling of complex scenarios easier. As example, see the
case in issue #299.

Note this is not a complete fix for #299
This commit is contained in:
Yuxuan Shui 2020-04-10 01:44:33 +01:00
parent b1b40ed058
commit 440157f20b
No known key found for this signature in database
GPG Key ID: 37C999F617EA1A47
3 changed files with 47 additions and 29 deletions
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59
src/event.c
View File

@ -336,28 +336,35 @@ static inline void ev_reparent_notify(session_t *ps, xcb_reparent_notify_event_t
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 (!w_top) {
// If not, look for its frame window
if (!wid_has_prop(ps, ev->window, ps->atoms->aWM_STATE)) {
log_debug("Window %#010x doesn't have WM_STATE property, it is "
"probably not a client window. But we will listen for "
"property change in case it gains one.",
ev->window);
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});
} else {
auto w_real_top = find_managed_window_or_parent(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_real_top && (!w_real_top->client_win ||
w_real_top->client_win == w_real_top->base.id)) {
// If it has WM_STATE, mark it the client window
if (wid_has_prop(ps, ev->window, ps->atoms->aWM_STATE)) {
w_real_top->wmwin = false;
win_unmark_client(ps, w_real_top);
win_mark_client(ps, w_real_top, ev->window);
}
// Otherwise, watch for WM_STATE on it
if (w_real_top && w_real_top->state != WSTATE_UNMAPPED &&
w_real_top->state != WSTATE_UNMAPPING) {
log_debug("Mark window %#010x (%s) as having a stale "
"client",
w_real_top->base.id, w_real_top->name);
win_set_flags(w_real_top, WIN_FLAGS_CLIENT_STALE);
ps->pending_updates = true;
} else {
if (!w_real_top)
log_debug("parent %#010x not found", ev->parent);
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});
// Window is not currently mapped, unmark its
// client to trigger a client recheck when it is
// mapped later.
win_unmark_client(ps, w_real_top);
log_debug("parent %#010x (%s) is in state %d",
w_real_top->base.id, w_real_top->name,
w_real_top->state);
}
}
}
@ -451,13 +458,11 @@ static inline void ev_property_notify(session_t *ps, xcb_property_notify_event_t
ps, ev->window, WIN_EVMODE_UNKNOWN)});
auto w_top = find_managed_window_or_parent(ps, ev->window);
// Initialize client_win as early as possible
if (w_top &&
(!w_top->client_win || w_top->client_win == w_top->base.id) &&
wid_has_prop(ps, ev->window, ps->atoms->aWM_STATE)) {
w_top->wmwin = false;
win_unmark_client(ps, w_top);
win_mark_client(ps, w_top, ev->window);
// ev->window might have not been managed yet, in that case w_top
// would be NULL.
if (w_top) {
win_set_flags(w_top, WIN_FLAGS_CLIENT_STALE);
ps->pending_updates = true;
}
}
}

15
src/win.c
View File

@ -53,6 +53,8 @@ static const int WIN_GET_LEADER_MAX_RECURSION = 20;
static const int ROUNDED_PIXELS = 1;
static const double ROUNDED_PERCENT = 0.05;
static void win_recheck_client(session_t *ps, struct managed_win *w);
/// Generate a "return by value" function, from a function that returns the
/// region via a region_t pointer argument.
/// Function signature has to be (win *, region_t *)
@ -323,8 +325,8 @@ void win_release_images(struct backend_base *backend, struct managed_win *w) {
void win_process_flags(session_t *ps, struct managed_win *w) {
if (win_check_flags_all(w, WIN_FLAGS_MAPPED)) {
map_win_start(ps, w);
win_clear_flags(w, WIN_FLAGS_MAPPED);
}
win_clear_flags(w, WIN_FLAGS_MAPPED);
// Not a loop
while (win_check_flags_any(w, WIN_FLAGS_IMAGES_STALE) &&
@ -367,7 +369,14 @@ void win_process_flags(session_t *ps, struct managed_win *w) {
}
// Clear stale image flags
win_clear_flags(w, WIN_FLAGS_IMAGES_STALE);
if (win_check_flags_any(w, WIN_FLAGS_IMAGES_STALE)) {
win_clear_flags(w, WIN_FLAGS_IMAGES_STALE);
}
if (win_check_flags_all(w, WIN_FLAGS_CLIENT_STALE)) {
win_recheck_client(ps, w);
win_clear_flags(w, WIN_FLAGS_CLIENT_STALE);
}
}
/**
@ -2326,6 +2335,7 @@ win_is_fullscreen_xcb(xcb_connection_t *c, const struct atom *a, const xcb_windo
/// Set flags on a window. Some sanity checks are performed
void win_set_flags(struct managed_win *w, uint64_t flags) {
log_debug("Set flags %lu to window %#010x (%s)", flags, w->base.id, w->name);
if (unlikely(w->state == WSTATE_DESTROYING)) {
log_error("Flags set on a destroyed window %#010x (%s)", w->base.id, w->name);
return;
@ -2336,6 +2346,7 @@ void win_set_flags(struct managed_win *w, uint64_t flags) {
/// Clear flags on a window. Some sanity checks are performed
void win_clear_flags(struct managed_win *w, uint64_t flags) {
log_debug("Clear flags %lu from window %#010x (%s)", flags, w->base.id, w->name);
if (unlikely(w->state == WSTATE_DESTROYING)) {
log_error("Flags cleared on a destroyed window %#010x (%s)", w->base.id,
w->name);

2
src/win_defs.h
View File

@ -81,6 +81,8 @@ enum win_flags {
WIN_FLAGS_SHADOW_STALE = 8,
/// shadow has not been generated
WIN_FLAGS_SHADOW_NONE = 16,
/// the client window needs to be updated
WIN_FLAGS_CLIENT_STALE = 32,
/// the window is mapped by X, we need to call map_win_start for it
WIN_FLAGS_MAPPED = 64,
};