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clients: A better fix for a crash when unlocking or unconfining a pointer

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This is a rewrite of the fix in:
https://lists.freedesktop.org/archives/wayland-devel/2018-May/038140.html

It addresses Pekka's concerns about window getting destroyed before the
unlock/unconfine event is triggered.

Signed-off-by: Dima Ryazanov <dima@gmail.com>
This commit is contained in:
Dima Ryazanov 2018-11-14 22:17:42 -08:00 committed by Daniel Stone
parent 44dd7f2738
commit 13bdf25270
1 changed files with 27 additions and 4 deletions
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31
clients/window.c
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@ -343,6 +343,8 @@ struct input {
struct window *pointer_focus;
struct window *keyboard_focus;
struct window *touch_focus;
struct window *locked_window;
struct window *confined_window;
int current_cursor;
uint32_t cursor_anim_start;
struct wl_callback *cursor_frame_cb;
@ -1584,6 +1586,10 @@ window_destroy(struct window *window)
input->pointer_focus = NULL;
if (input->keyboard_focus == window)
input->keyboard_focus = NULL;
if (input->locked_window == window)
input->locked_window = NULL;
if (input->confined_window == window)
input->confined_window = NULL;
if (input->focus_widget &&
input->focus_widget->window == window)
input->focus_widget = NULL;
@ -4792,7 +4798,10 @@ locked_pointer_locked(void *data,
struct zwp_locked_pointer_v1 *locked_pointer)
{
struct input *input = data;
struct window *window = input->pointer_focus;
struct window *window = input->locked_window;
if (!window)
return;
window->pointer_locked = true;
@ -4808,10 +4817,15 @@ locked_pointer_unlocked(void *data,
struct zwp_locked_pointer_v1 *locked_pointer)
{
struct input *input = data;
struct window *window = input->pointer_focus;
struct window *window = input->locked_window;
if (!window)
return;
window_unlock_pointer(window);
input->locked_window = NULL;
if (window->pointer_unlocked_handler) {
window->pointer_unlocked_handler(window,
input,
@ -4867,6 +4881,7 @@ window_lock_pointer(struct window *window, struct input *input)
window->locked_pointer = locked_pointer;
window->relative_pointer = relative_pointer;
input->locked_window = window;
return 0;
}
@ -4904,7 +4919,10 @@ confined_pointer_confined(void *data,
struct zwp_confined_pointer_v1 *confined_pointer)
{
struct input *input = data;
struct window *window = input->pointer_focus;
struct window *window = input->confined_window;
if (!window)
return;
window->confined = true;
@ -4920,11 +4938,15 @@ confined_pointer_unconfined(void *data,
struct zwp_confined_pointer_v1 *confined_pointer)
{
struct input *input = data;
struct window *window = input->pointer_focus;
struct window *window = input->confined_window;
if (!window)
return;
window_unconfine_pointer(window);
window->confined = false;
input->confined_window = NULL;
if (window->pointer_unconfined_handler) {
window->pointer_unconfined_handler(window,
@ -4989,6 +5011,7 @@ window_confine_pointer_to_rectangles(struct window *window,
window->confined_pointer = confined_pointer;
window->confined_widget = NULL;
input->confined_window = window;
return 0;
}