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term: move cursor to absolute visual position

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Instead of relative, character-based position. In anticipation of
greater degrees of cursor freedom, and so that we don't have to
track invisible characters all the time.
This commit is contained in:
fang 2020-12-20 20:51:37 +01:00
parent 776de8b3d9
commit 48c9f76ba3
No known key found for this signature in database
GPG Key ID: EB035760C1BBA972
2 changed files with 14 additions and 41 deletions
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1
pkg/urbit/include/vere/vere.h
View File

@ -148,7 +148,6 @@
c3_y* lin_y; // current line (utf8)
c3_w byt_w; // utf8 line-length
c3_w wor_w; // utf32 line-length
c3_w sap_w; // escape chars in line
c3_w cus_w; // cursor position
} mir;

54
pkg/urbit/vere/io/term.c
View File

@ -220,7 +220,6 @@ u3_term_log_init(void)
uty_u->tat_u.mir.lin_y = 0;
uty_u->tat_u.mir.byt_w = 0;
uty_u->tat_u.mir.wor_w = 0;
uty_u->tat_u.mir.sap_w = 0;
uty_u->tat_u.mir.cus_w = 0;
uty_u->tat_u.esc.ape = c3n;
@ -463,27 +462,16 @@ _term_it_show_blank(u3_utty* uty_u)
static void
_term_it_show_cursor(u3_utty* uty_u, c3_w cur_w)
{
c3_w cus_w = uty_u->tat_u.mir.cus_w;
c3_w dif_w;
c3_c cur_c[5];
c3_c len_c = sprintf(cur_c, "%d", cur_w + 1);
//NOTE assumes all styled text precedes the cursor. drum enforces this.
//
cur_w += uty_u->tat_u.mir.sap_w;
uv_buf_t esc_u = TERM_LIT_BUF("\033[");
uv_buf_t pos_u = uv_buf_init(cur_c, len_c);
uv_buf_t cha_u = TERM_LIT_BUF("G");
if ( cur_w < cus_w ) {
dif_w = cus_w - cur_w;
while ( dif_w-- ) {
_term_it_dump_buf(uty_u, &uty_u->ufo_u.out.cub1_u);
}
}
else if ( cur_w > cus_w ) {
dif_w = cur_w - cus_w;
while ( dif_w-- ) {
_term_it_dump_buf(uty_u, &uty_u->ufo_u.out.cuf1_u);
}
}
_term_it_dump_buf(uty_u, &esc_u);
_term_it_dump_buf(uty_u, &pos_u);
_term_it_dump_buf(uty_u, &cha_u);
uty_u->tat_u.mir.cus_w = cur_w;
}
@ -491,7 +479,7 @@ _term_it_show_cursor(u3_utty* uty_u, c3_w cur_w)
/* _term_it_show_line(): render current line.
*/
static void
_term_it_show_line(u3_utty* uty_u, c3_w wor_w, c3_w sap_w)
_term_it_show_line(u3_utty* uty_u, c3_w wor_w)
{
u3_utat* tat_u = &uty_u->tat_u;
@ -511,7 +499,6 @@ _term_it_show_line(u3_utty* uty_u, c3_w wor_w, c3_w sap_w)
//
tat_u->mir.cus_w += wor_w;
tat_u->mir.wor_w = wor_w;
tat_u->mir.sap_w = sap_w;
}
/* _term_it_refresh_line(): refresh current line.
@ -521,11 +508,10 @@ _term_it_refresh_line(u3_utty* uty_u)
{
u3_utat* tat_u = &uty_u->tat_u;
c3_w wor_w = tat_u->mir.wor_w;
c3_w sap_w = tat_u->mir.sap_w;
c3_w cus_w = tat_u->mir.cus_w;
_term_it_show_clear(uty_u);
_term_it_show_line(uty_u, wor_w, sap_w);
_term_it_show_line(uty_u, wor_w);
_term_it_show_cursor(uty_u, cus_w);
}
@ -534,8 +520,7 @@ _term_it_refresh_line(u3_utty* uty_u)
static void
_term_it_set_line(u3_utty* uty_u,
c3_w* lin_w,
c3_w wor_w,
c3_w sap_w)
c3_w wor_w)
{
u3_utat* tat_u = &uty_u->tat_u;
c3_y* hun_y = (c3_y*)lin_w;
@ -577,9 +562,8 @@ _term_it_set_line(u3_utty* uty_u,
tat_u->mir.lin_y = hun_y;
tat_u->mir.byt_w = byt_w;
tat_u->mir.wor_w = wor_w;
tat_u->mir.sap_w = sap_w;
_term_it_show_line(uty_u, wor_w, sap_w);
_term_it_show_line(uty_u, wor_w);
}
/* _term_it_show_more(): new current line.
@ -1244,7 +1228,6 @@ _term_it_show_stub(u3_utty* uty_u,
// tracking total and escape characters written
//
c3_w i_w = 0;
c3_w sap_w = 0;
{
u3_noun nub = tub;
while ( u3_nul != nub ) {
@ -1264,7 +1247,6 @@ _term_it_show_stub(u3_utty* uty_u,
c3_o mor_o = c3n;
lin_w[i_w++] = 27;
lin_w[i_w++] = '[';
sap_w += 2;
// text decorations
//
@ -1274,10 +1256,8 @@ _term_it_show_stub(u3_utty* uty_u,
while ( u3_nul != des ) {
if ( c3y == mor_o ) {
lin_w[i_w++] = ';';
sap_w++;
}
_term_it_put_deco(&lin_w[i_w++], u3h(des));
sap_w++;
mor_o = c3y;
des = u3t(des);
}
@ -1289,12 +1269,10 @@ _term_it_show_stub(u3_utty* uty_u,
if ( u3_nul != bag ) {
if ( c3y == mor_o ) {
lin_w[i_w++] = ';';
sap_w++;
}
lin_w[i_w++] = '4';
c3_w put_w = _term_it_put_tint(&lin_w[i_w], bag);
i_w += put_w;
sap_w += ++put_w;
mor_o = c3y;
}
@ -1303,17 +1281,14 @@ _term_it_show_stub(u3_utty* uty_u,
if ( u3_nul != fog ) {
if ( c3y == mor_o ) {
lin_w[i_w++] = ';';
sap_w++;
}
lin_w[i_w++] = '3';
c3_w put_w = _term_it_put_tint(&lin_w[i_w], fog);
i_w += put_w;
sap_w += ++put_w;
mor_o = c3y;
}
lin_w[i_w++] = 'm';
sap_w++;
}
// write the text itself
@ -1329,14 +1304,13 @@ _term_it_show_stub(u3_utty* uty_u,
lin_w[i_w++] = '[';
lin_w[i_w++] = '0';
lin_w[i_w++] = 'm';
sap_w += 4;
}
nub = u3t(nub);
}
}
_term_it_set_line(uty_u, lin_w, i_w, sap_w);
_term_it_set_line(uty_u, lin_w, i_w);
u3z(tub);
}
@ -1358,7 +1332,7 @@ _term_it_show_tour(u3_utty* uty_u,
}
}
_term_it_set_line(uty_u, lin_w, len_w, 0);
_term_it_set_line(uty_u, lin_w, len_w);
u3z(lin);
}