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When MODE_SYNC is on, all terminal updates need to deferred, not just

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scrolling. Check the flag before each one. GitHub issue 4983.
This commit is contained in:
nicm
2026-06-11 19:50:23 +00:00
parent b6be437bab
commit 11b6e7844a
2 changed files with 44 additions and 9 deletions
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40
screen-write.c
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@@ -1158,7 +1158,8 @@ screen_write_redraw_line(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx,
ttyctx->ocx = cx;
ttyctx->ocy = yy;
tty_write(tty_cmd_cell, ttyctx);
if (~s->mode & MODE_SYNC)
tty_write(tty_cmd_cell, ttyctx);
}
}
}
@@ -1200,6 +1201,8 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
screen_write_initctx(ctx, &ttyctx, 1, 1);
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_alignmenttest, &ttyctx);
return;
@@ -1234,6 +1237,8 @@ screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = nx;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_insertcharacter, &ttyctx);
return;
@@ -1268,6 +1273,8 @@ screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = nx;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_deletecharacter, &ttyctx);
return;
@@ -1302,6 +1309,8 @@ screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = nx;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_clearcharacter, &ttyctx);
return;
@@ -1336,6 +1345,8 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = ny;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_insertline, &ttyctx);
return;
@@ -1361,6 +1372,8 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = ny;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_insertline, &ttyctx);
return;
@@ -1395,6 +1408,8 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = ny;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_deleteline, &ttyctx);
return;
@@ -1420,6 +1435,8 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = ny;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_deleteline, &ttyctx);
return;
@@ -1541,6 +1558,8 @@ screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
screen_write_initctx(ctx, &ttyctx, 1, 1);
ttyctx.bg = bg;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_reverseindex, &ttyctx);
return;
@@ -1651,6 +1670,8 @@ screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = lines;
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
tty_write(tty_cmd_scrolldown, &ttyctx);
return;
@@ -1697,6 +1718,8 @@ screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
screen_write_collect_flush(ctx, 0, __func__);
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED) {
tty_write(tty_cmd_clearendofscreen, &ttyctx);
return;
@@ -1766,6 +1789,8 @@ screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
screen_write_collect_clear(ctx, 0, s->cy);
screen_write_collect_flush(ctx, 0, __func__);
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED) {
tty_write(tty_cmd_clearstartofscreen, &ttyctx);
return;
@@ -1834,6 +1859,8 @@ screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
screen_write_collect_clear(ctx, 0, sy);
if (s->mode & MODE_SYNC)
return;
if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED) {
tty_write(tty_cmd_clearscreen, &ttyctx);
return;
@@ -2482,7 +2509,8 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
if (s->mode & MODE_INSERT) {
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.n = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
if (~s->mode & MODE_SYNC)
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
/* If not writing, done now. */
@@ -2506,7 +2534,8 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
for (i = 0, vis = 0; i < r->used; i++)
vis += r->ranges[i].nx;
if (vis >= width) {
tty_write(tty_cmd_cell, &ttyctx);
if (~s->mode & MODE_SYNC)
tty_write(tty_cmd_cell, &ttyctx);
return;
}
@@ -2515,6 +2544,8 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
* spaces in the visible regions.
*/
utf8_set(&tmp_gc.data, ' ');
if (s->mode & MODE_SYNC)
return;
for (i = 0; i < r->used; i++) {
ri = &r->ranges[i];
if (ri->nx == 0)
@@ -2656,7 +2687,8 @@ screen_write_combine(struct screen_write_ctx *ctx, const struct grid_cell *gc)
ttyctx.cell = &last;
if (force_wide)
ttyctx.flags |= TTY_CTX_CELL_INVALIDATE;
tty_write(tty_cmd_cell, &ttyctx);
if (~s->mode & MODE_SYNC)
tty_write(tty_cmd_cell, &ttyctx);
screen_write_set_cursor(ctx, cx, cy);
return (1);