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Use a little termline to store pre-edit text

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I think supporting combining characters in pre-edit text will be simpler
if I can use add_cc, which operated on termlines.  Also we have code for
resizing termlines, which means I might not need to count the width of
the pre-edit string accurately before allocating it.
This commit is contained in:
Ben Harris 2025-04-05 16:00:00 +01:00
parent 3bbde58c09
commit 4776885767
2 changed files with 16 additions and 21 deletions
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34
terminal/terminal.c
View File

@ -2160,7 +2160,7 @@ void term_free(Terminal *term)
if (term->userpass_state)
term_userpass_state_free(term->userpass_state);
sfree(term->preedit_termchars);
freetermline(term->preedit_termline);
sfree(term);
}
@ -6121,13 +6121,13 @@ static void do_paint(Terminal *term)
}
/* Work out if and where to display pre-edit text. */
if (i == our_curs_y && term->preedit_termchars != NULL) {
debug("preedit_width = %d\n", term->preedit_width);
if (i == our_curs_y && term->preedit_termline != NULL) {
debug("preedit_width = %d\n", term->preedit_termline->cols);
preedit_start = our_curs_x;
preedit_end = preedit_start + term->preedit_width;
preedit_end = preedit_start + term->preedit_termline->cols;
if (preedit_end > term->cols) {
preedit_end = term->cols;
preedit_start = preedit_end - term->preedit_width;
preedit_start = preedit_end - term->preedit_termline->cols;
}
our_curs_x = preedit_start;
}
@ -6143,7 +6143,7 @@ static void do_paint(Terminal *term)
scrpos.x = backward ? backward[j] : j;
if (in_preedit)
d = term->preedit_termchars + j - preedit_start;
d = term->preedit_termline->chars + j - preedit_start;
tchar = d->chr;
tattr = d->attr;
@ -6282,7 +6282,7 @@ static void do_paint(Terminal *term)
bool in_preedit = j >= preedit_start && j < preedit_end;
if (in_preedit)
d = term->preedit_termchars + j - preedit_start;
d = term->preedit_termline->chars + j - preedit_start;
tattr = newline[j].attr;
tchar = newline[j].chr;
@ -8138,29 +8138,25 @@ void term_notify_window_size_pixels(Terminal *term, int x, int y)
*/
void term_set_preedit_text(Terminal *term, char *preedit_text)
{
sfree(term->preedit_termchars);
term->preedit_termchars = NULL;
term->preedit_width = 0;
freetermline(term->preedit_termline);
term->preedit_termline = NULL;
if (preedit_text != NULL) {
BinarySource src[1];
int i;
int width = 0, i;
debug("Pre-edit:");
BinarySource_BARE_INIT(src, preedit_text, strlen(preedit_text));
while (get_avail(src))
term->preedit_width +=
term_char_width(term, decode_utf8(src, NULL));
term->preedit_termchars = snewn(term->preedit_width, termchar);
width += term_char_width(term, decode_utf8(src, NULL));
term->preedit_termline = newtermline(term, width, false);
BinarySource_REWIND(src);
for (i = 0; i < term->preedit_width; i++) {
for (i = 0; i < width; i++) {
unsigned int c = decode_utf8(src, NULL);
debug(" U+%04X", c);
if (term_char_width(term, c) >= 1) {
term->preedit_termchars[i] = term->basic_erase_char;
term->preedit_termchars[i].chr = c;
term->preedit_termline->chars[i].chr = c;
if (term_char_width(term, c) >= 2) {
term->preedit_termchars[i+1] = term->basic_erase_char;
term->preedit_termchars[i+1].chr = UCSWIDE;
term->preedit_termline->chars[i+1].chr = UCSWIDE;
i++;
}
}

3
terminal/terminal.h
View File

@ -444,8 +444,7 @@ struct terminal_tag {
bool userpass_utf8_override;
/* Input method state. */
termchar *preedit_termchars;
int preedit_width;
termline *preedit_termline;
};
static inline bool in_utf(Terminal *term)