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Sync OpenBSD patchset 400:

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When backspace is received at the beginning of a line and the previous line was
wrapped, move the cursor back up to the end of the previous line.

Another one of the forgotten persons requested this quite a while ago (I need
to start noting names on todo items...) when it was quite hard to
implement. Now it is easy and I don't see it can do any harm, so hey presto...
This commit is contained in:
Tiago Cunha
2009-10-15 01:39:30 +00:00
parent 04db3c6211
commit cbd3b1bc9b
3 changed files with 25 additions and 4 deletions
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22
screen-write.c
View File

@ -1,4 +1,4 @@
/* $Id: screen-write.c,v 1.75 2009-10-15 01:35:35 tcunha Exp $ */
/* $Id: screen-write.c,v 1.76 2009-10-15 01:39:30 tcunha Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -513,6 +513,25 @@ screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
s->cx -= nx;
}
/* Backspace; cursor left unless at start of wrapped line when can move up. */
void
screen_write_backspace(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct grid_line *gl;
if (s->cx == 0) {
if (s->cy == 0)
return;
gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
if (gl->flags & GRID_LINE_WRAPPED) {
s->cy--;
s->cx = screen_size_x(s) - 1;
}
} else
s->cx--;
}
/* VT100 alignment test. */
void
screen_write_alignmenttest(struct screen_write_ctx *ctx)
@ -536,6 +555,7 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
s->cy = 0;
s->rupper = 0;
s->rlower = screen_size_y(s) - 1;
tty_write(tty_cmd_alignmenttest, &ttyctx);