acme bug fix

[rsc, 2010-08-24 13:58:27]

looks good, sorry for the delay.

On Tue, Aug 24, 2010 at 02:14,  <r@golang.org> wrote:
> Reviewers: rsc,
>
>loo
>
> Please review this at http://codereview.appspot.com/2007045/
>
> Affected files:
>  M src/cmd/acme/rows.c
>
>
> Index: src/cmd/acme/rows.c
> ===================================================================
> --- a/src/cmd/acme/rows.c
> +++ b/src/cmd/acme/rows.c
> @@ -102,12 +102,14 @@
>  void
>  rowresize(Row *row, Rectangle r)
>  {
> -       int i, dx, odx;
> -       Rectangle r1, r2;
> +       int i, dx, odx, deltax;
> +       Rectangle or, r1, r2;
>        Column *c;
>
>        dx = Dx(r);
>        odx = Dx(row->r);
> +       or = row->r;
> +       deltax = r.min.x - or.min.x;
>        row->r = r;
>        r1 = r;
>        r1.max.y = r1.min.y + font->height;
> @@ -121,10 +123,11 @@
>        for(i=0; i<row->ncol; i++){
>                c = row->col[i];
>                r1.min.x = r1.max.x;
> +               /* the test should not be necessary, but guarantee we don't
> lose a pixel */
>                if(i == row->ncol-1)
>                        r1.max.x = r.max.x;
>                else
> -                       r1.max.x = r1.min.x+Dx(c->r)*dx/odx;
> +                       r1.max.x = (c->r.max.x-or.min.x)*Dx(r)/Dx(or) +
> deltax;
>                if(i > 0){
>                        r2 = r1;
>                        r2.max.x = r2.min.x+Border;
>
>
>

[rsc, 2010-08-24 14:17:13]

*** Submitted as b833c11f9a03 ***

acme: fix rounding in rows computation

R=rsc
CC=codebot
http://codereview.appspot.com/2007045

Committer: Russ Cox <rsc@swtch.com>