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wayland: Refactor time fields in SDL_WaylandKeyboardRepeat 

Refactorization with no functional changes.

Instead of `next_repeat_ms` containing a timestamp based on SDL ticks, we make
it zero-based relative to the key press time, and we store the key press time in
SDL ticks in a new field.

This refactorization is groundwork for future commits which need to use the
key press and release timestamps provided by the Wayland API, which are also
expressed in milliseconds, but whose base does not match the one for SDL ticks.

Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com>
This commit is contained in:
Joan Bruguera 2022-01-08 19:09:35 +01:00 committed by Sam Lantinga
parent fb0c3040c0
commit 461724d287
2 changed files with 18 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/video/wayland/SDL_waylandevents.c
View File

@ -204,13 +204,10 @@ touch_surface(SDL_TouchID id)
/* Returns SDL_TRUE if a key repeat event was due */
static SDL_bool
keyboard_repeat_handle(SDL_WaylandKeyboardRepeat* repeat_info, uint32_t now)
keyboard_repeat_handle(SDL_WaylandKeyboardRepeat* repeat_info, uint32_t elapsed)
{
SDL_bool ret = SDL_FALSE;
if (!repeat_info->is_key_down || !repeat_info->is_initialized) {
return ret;
}
while ((now - repeat_info->next_repeat_ms) < 0x80000000U) {
while ((elapsed - repeat_info->next_repeat_ms) < 0x80000000U) {
if (repeat_info->scancode != SDL_SCANCODE_UNKNOWN) {
SDL_SendKeyboardKey(SDL_PRESSED, repeat_info->scancode);
}
@ -238,7 +235,8 @@ keyboard_repeat_set(SDL_WaylandKeyboardRepeat* repeat_info,
return;
}
repeat_info->is_key_down = SDL_TRUE;
repeat_info->next_repeat_ms = SDL_GetTicks() + repeat_info->repeat_delay;
repeat_info->sdl_press_time = SDL_GetTicks();
repeat_info->next_repeat_ms = repeat_info->repeat_delay;
repeat_info->scancode = scancode;
if (has_text) {
SDL_memcpy(repeat_info->text, text, 8);
@ -247,6 +245,10 @@ keyboard_repeat_set(SDL_WaylandKeyboardRepeat* repeat_info,
}
}
static SDL_bool keyboard_repeat_is_set(SDL_WaylandKeyboardRepeat* repeat_info) {
return repeat_info->is_initialized && repeat_info->is_key_down;
}
void
Wayland_SendWakeupEvent(_THIS, SDL_Window *window)
{
@ -273,13 +275,13 @@ Wayland_WaitEventTimeout(_THIS, int timeout)
#endif
/* If key repeat is active, we'll need to cap our maximum wait time to handle repeats */
if (input && input->keyboard_repeat.is_initialized && input->keyboard_repeat.is_key_down) {
uint32_t now = SDL_GetTicks();
if (keyboard_repeat_handle(&input->keyboard_repeat, now)) {
if (input && keyboard_repeat_is_set(&input->keyboard_repeat)) {
uint32_t elapsed = SDL_GetTicks() - input->keyboard_repeat.sdl_press_time;
if (keyboard_repeat_handle(&input->keyboard_repeat, elapsed)) {
/* A repeat key event was already due */
return 1;
} else {
uint32_t next_repeat_wait_time = (input->keyboard_repeat.next_repeat_ms - now) + 1;
uint32_t next_repeat_wait_time = (input->keyboard_repeat.next_repeat_ms - elapsed) + 1;
if (timeout >= 0) {
timeout = SDL_min(timeout, next_repeat_wait_time);
} else {
@ -305,8 +307,8 @@ Wayland_WaitEventTimeout(_THIS, int timeout)
/* If key repeat is active, we might have woken up to generate a key event */
if (key_repeat_active) {
uint32_t now = SDL_GetTicks();
if (keyboard_repeat_handle(&input->keyboard_repeat, now)) {
uint32_t elapsed = SDL_GetTicks() - input->keyboard_repeat.sdl_press_time;
if (keyboard_repeat_handle(&input->keyboard_repeat, elapsed)) {
return 1;
}
}
@ -346,9 +348,9 @@ Wayland_PumpEvents(_THIS)
}
#endif
if (input) {
uint32_t now = SDL_GetTicks();
keyboard_repeat_handle(&input->keyboard_repeat, now);
if (input && keyboard_repeat_is_set(&input->keyboard_repeat)) {
uint32_t elapsed = SDL_GetTicks() - input->keyboard_repeat.sdl_press_time;
keyboard_repeat_handle(&input->keyboard_repeat, elapsed);
}
/* wl_display_prepare_read() will return -1 if the default queue is not empty.

1
src/video/wayland/SDL_waylandevents_c.h
View File

@ -36,6 +36,7 @@ typedef struct {
SDL_bool is_initialized;
SDL_bool is_key_down;
uint32_t sdl_press_time; // Key press time expressed in SDL ticks
uint32_t next_repeat_ms;
uint32_t scancode;
char text[8];