static const char *
utf8_next_char(const char *p)
{
if (*p != 0)
return utf8_end_char(++p);
return NULL;
}
static void
text_model_delete_surrounding_text(void *data,
struct text_model *text_model,
int32_t index,
uint32_t length)
{
struct text_entry *entry = data;
uint32_t cursor_index = index + entry->cursor;
const char *start, *end;
if (cursor_index > strlen(entry->text)) {
fprintf(stderr, "Invalid cursor index %d\n", index);
return;
}
if (cursor_index + length > strlen(entry->text)) {
fprintf(stderr, "Invalid length %d\n", length);
return;
}
if (length == 0)
return;
start = utf8_start_char(entry->text, entry->text + cursor_index);
end = utf8_end_char(entry->text + cursor_index + length);
text_entry_delete_text(entry,
start - entry->text,
end - start);
}
static void
key_handler(struct window *window,
struct input *input, uint32_t time,
uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
void *data)
{
struct editor *editor = data;
struct text_entry *entry;
const char *start, *end, *new_char;
char text[16];
if (!editor->active_entry)
return;
entry = editor->active_entry;
if (state != WL_KEYBOARD_KEY_STATE_PRESSED)
return;
switch (sym) {
case XKB_KEY_BackSpace:
start = utf8_prev_char(entry->text, entry->text + entry->cursor);
if (start == NULL)
break;
end = utf8_end_char(entry->text + entry->cursor);
text_entry_delete_text(entry,
start - entry->text,
end - start);
break;
case XKB_KEY_Delete:
start = utf8_start_char(entry->text, entry->text + entry->cursor);
if (start == NULL)
break;
end = utf8_next_char(start);
if (end == NULL)
break;
text_entry_delete_text(entry,
start - entry->text,
end - start);
break;
case XKB_KEY_Left:
new_char = utf8_prev_char(entry->text, entry->text + entry->cursor);
if (new_char != NULL) {
entry->cursor = new_char - entry->text;
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
}
break;
case XKB_KEY_Right:
new_char = utf8_next_char(entry->text + entry->cursor);
if (new_char != NULL) {
entry->cursor = new_char - entry->text;
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
}
break;
default:
if (xkb_keysym_to_utf8(sym, text, sizeof(text)) <= 0)
break;
text_entry_insert_at_cursor(entry, text);
break;
}
widget_schedule_redraw(entry->widget);
}
