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Added SDL_EVENT_TEXT_EDITING_CANDIDATES

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This allows applications that have set SDL_HINT_IME_SHOW_UI to "0" to get candidates lists they can draw themselves.

Fixes https://github.com/libsdl-org/SDL/issues/4855
This commit is contained in:
Sam Lantinga 2024-06-26 10:19:00 -07:00
parent c983c1da97
commit ed2022a175
7 changed files with 346 additions and 445 deletions
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41
src/events/SDL_keyboard.c
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@ -659,6 +659,47 @@ int SDL_SendEditingText(const char *text, int start, int length)
return posted;
}
int SDL_SendEditingTextCandidates(char **candidates, int num_candidates, int selected_candidate, SDL_bool horizontal)
{
SDL_Keyboard *keyboard = &SDL_keyboard;
int posted;
if (!SDL_TextInputActive(keyboard->focus)) {
return 0;
}
/* Post the event, if desired */
posted = 0;
if (SDL_EventEnabled(SDL_EVENT_TEXT_EDITING_CANDIDATES)) {
SDL_Event event;
event.type = SDL_EVENT_TEXT_EDITING_CANDIDATES;
event.common.timestamp = 0;
event.edit.windowID = keyboard->focus ? keyboard->focus->id : 0;
if (num_candidates > 0) {
const char **event_candidates = (const char **)SDL_AllocateEventMemory((num_candidates + 1) * sizeof(*event_candidates));
if (!event_candidates) {
return 0;
}
for (int i = 0; i < num_candidates; ++i) {
event_candidates[i] = SDL_AllocateEventString(candidates[i]);
}
event_candidates[num_candidates] = NULL;
event.edit_candidates.candidates = event_candidates;
event.edit_candidates.num_candidates = num_candidates;
event.edit_candidates.selected_candidate = selected_candidate;
event.edit_candidates.horizontal = horizontal;
} else {
event.edit_candidates.candidates = NULL;
event.edit_candidates.num_candidates = 0;
event.edit_candidates.selected_candidate = -1;
event.edit_candidates.horizontal = SDL_FALSE;
}
posted = (SDL_PushEvent(&event) > 0);
}
return posted;
}
void SDL_QuitKeyboard(void)
{
for (int i = SDL_keyboard_count; i--;) {