/* Test al_ustr_next with invalid input. */
static void t25(void)
{
const char str[] = "þ\xf4\x8f\xbf.";
ALLEGRO_USTR_INFO info;
const ALLEGRO_USTR *us = al_ref_buffer(&info, str, sizeof(str) - 1);
int pos;
/* Starting in middle of a sequence. */
pos = 1;
CHECK(al_ustr_next(us, &pos));
CHECK(pos == 2);
/* Unexpected end of 4-byte sequence. */
CHECK(al_ustr_next(us, &pos));
CHECK(pos == 5);
}
/* Function: al_ustr_length
*/
size_t al_ustr_length(const ALLEGRO_USTR *us)
{
int pos = 0;
int c = 0;
while (al_ustr_next(us, &pos))
c++;
return c;
}
/* Test al_ustr_next. */
static void t24(void)
{
const char str[] = "a\0þ€\xf4\x8f\xbf\xbf";
ALLEGRO_USTR_INFO info;
const ALLEGRO_USTR *us = al_ref_buffer(&info, str, sizeof(str) - 1);
int pos = 0;
CHECK(al_ustr_next(us, &pos)); /* a */
CHECK(pos == 1);
CHECK(al_ustr_next(us, &pos)); /* NUL */
CHECK(pos == 2);
CHECK(al_ustr_next(us, &pos)); /* þ */
CHECK(pos == 4);
CHECK(al_ustr_next(us, &pos)); /* € */
CHECK(pos == 7);
CHECK(al_ustr_next(us, &pos)); /* U+10FFFF */
CHECK(pos == 11);
CHECK(! al_ustr_next(us, &pos)); /* end */
CHECK(pos == 11);
}
/* Function: al_ustr_offset
*/
int al_ustr_offset(const ALLEGRO_USTR *us, int index)
{
int pos = 0;
if (index < 0)
index += al_ustr_length(us);
while (index-- > 0) {
if (!al_ustr_next(us, &pos))
return pos;
}
return pos;
}
void TextEntry::draw()
{
const Theme & theme = dialog->get_theme();
SaveState state;
ALLEGRO_COLOR bg = theme.bg;
if (is_disabled()) {
bg = al_map_rgb(64, 64, 64);
}
al_draw_filled_rectangle(x1, y1, x2, y2, bg);
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_INVERSE_ALPHA);
if (!focused) {
al_draw_ustr(theme.font, theme.fg, x1, y1, 0, UString(text, left_pos));
}
else {
int x = x1;
if (cursor_pos > 0) {
UString sub(text, left_pos, cursor_pos);
al_draw_ustr(theme.font, theme.fg, x1, y1, 0, sub);
x += al_get_ustr_width(theme.font, sub);
}
if ((unsigned) cursor_pos == al_ustr_size(text)) {
al_draw_filled_rectangle(x, y1, x + CURSOR_WIDTH,
y1 + al_get_font_line_height(theme.font), theme.fg);
}
else {
int post_cursor = cursor_pos;
al_ustr_next(text, &post_cursor);
UString sub(text, cursor_pos, post_cursor);
int subw = al_get_ustr_width(theme.font, sub);
al_draw_filled_rectangle(x, y1, x + subw,
y1 + al_get_font_line_height(theme.font), theme.fg);
al_draw_ustr(theme.font, theme.bg, x, y1, 0, sub);
x += subw;
al_draw_ustr(theme.font, theme.fg, x, y1, 0,
UString(text, post_cursor));
}
}
}
/* Function: al_ustr_get_next
*/
int32_t al_ustr_get_next(const ALLEGRO_USTR *us, int *pos)
{
int32_t c = al_ustr_get(us, *pos);
if (c >= 0) {
(*pos) += al_utf8_width(c);
return c;
}
if (c == -1) {
/* Past end. */
return c;
}
/* Some invalid byte sequence. */
al_ustr_next(us, pos);
return c;
}
void TextEntry::on_key_down(const ALLEGRO_KEYBOARD_EVENT & event)
{
if (is_disabled())
return;
switch (event.keycode) {
case ALLEGRO_KEY_LEFT:
al_ustr_prev(text, &cursor_pos);
break;
case ALLEGRO_KEY_RIGHT:
al_ustr_next(text, &cursor_pos);
break;
case ALLEGRO_KEY_HOME:
cursor_pos = 0;
break;
case ALLEGRO_KEY_END:
cursor_pos = al_ustr_size(text);
break;
case ALLEGRO_KEY_DELETE:
al_ustr_remove_chr(text, cursor_pos);
break;
case ALLEGRO_KEY_BACKSPACE:
if (al_ustr_prev(text, &cursor_pos))
al_ustr_remove_chr(text, cursor_pos);
break;
default:
if (event.unichar >= ' ') {
al_ustr_insert_chr(text, cursor_pos, event.unichar);
cursor_pos += al_utf8_width(event.unichar);
}
break;
}
maybe_scroll();
dialog->request_draw();
}
void TextEntry::maybe_scroll()
{
const Theme & theme = dialog->get_theme();
if (cursor_pos < left_pos + 3) {
if (cursor_pos < 3)
left_pos = 0;
else
left_pos = cursor_pos - 3;
}
else {
for (;;) {
const int tw = al_get_ustr_width(theme.font,
UString(text, left_pos, cursor_pos));
if (x1 + tw + CURSOR_WIDTH < x2) {
break;
}
al_ustr_next(text, &left_pos);
}
}
}