esac
case ",$XNSCR," in
,,)
- XNSCR=1 XSCR0_X=0 XSCR0_Y=0 XSCR0_WIDTH=$XWIDTH XSCR0_HEIGHT=XHEIGHT
+ XNSCR=1 XSCR0_X=0 XSCR0_Y=0 XSCR0_WIDTH=$XWIDTH XSCR0_HEIGHT=$XHEIGHT
;;
esac
i=0; while (( i < XNSCR )); do
## Choose a width for Emacs.
##
-## We'd like it to be as wide as possible, allowing for a column of xterms
-## down the right hand side. However, I'd prefer a double-width Emacs to a
-## single-width Emacs and xterms. If it's not going to work at all, a single
-## Emacs column will have to do. Also, there's a strange thing with Emacs21
-## and the toolbar, so we add on some rows which are later mysteriously
-## subtracted.
-
+## We're going to make a single frame of Emacs, which will be automatically
+## divvied into columns; the rest of the space will be tiled with xterms. If
+## we have multiple screens, then Emacs can have the first screen and we'll
+## fill the rest with terminals. Otherwise, we'll try to have N columns of
+## Emacs, and N - 1 columns of xterms; if that doesn't work, we'll make do
+## with N - 2 columns of xterms.
+##
+## So, let W be the available width; let E and T be the widths of an Emacs
+## column (e_colwd) and terminal (t_wd), respectively, and let E0 be the
+## additive width of Emacs's existence (e_hextra). If we have more than one
+## screen, then instead, let T be zero. To start out, then, we let N = 1 +
+## floor((W - E - E0)/(E + T)). If W - E0 - (N + 1) E - (N - 1)*T >= 0, then
+## we increase N by one.
declare -i lim=XSCR0_WIDTH
if (( lim > xbound )); then lim=xbound; fi
-declare -i ecols="(lim - t_wd - e_hextra)/e_colwd"
-if (( ecols < 2 && lim > 2*e_colwd + e_hextra )); then ecols=2
-elif (( ecols < 1 )); then ecols=1
+declare -i twd=t_wd; if (( XNSCR > 1 )); then twd=0; fi
+declare -i ecols=$(( (lim - e_colwd - e_hextra)/(e_colwd + twd) + 1 ))
+if (( lim - e_hextra - (ecols + 1)*e_colwd - (ecols - 1)*twd >= 0 )); then
+ ecols=$(( ecols + 1 ))
fi
declare -i \
- emacsx="ecols*e_colchars + e_cextra" \
- emacsy="(XHEIGHT - e_vextra)/e_lineht"
+ emacsx=$(( ecols*e_colchars + e_cextra )) \
+ emacsy=$(( (XHEIGHT - e_vextra)/e_lineht ))
start-emacs () {
GDK_NATIVE_WINDOWS=1 run bgclients noip \
start-xterms () {
## Initialize some parameters.
- declare -i x="ecols*e_colwd + e_hextra + XSCR0_X" xb=xbound
+ declare -i x=$(( ecols*e_colwd + e_hextra + XSCR0_X )) xb=xbound
declare -i n=0 pgx=0 l h y ht scr=0 ll=lim
- declare -i hstd="35*t_lineht + t_vextra" hmin="25*t_lineht + t_vextra"
+ declare -i hstd=$(( 35*t_lineht + t_vextra ))
+ declare -i hmin=$(( 25*t_lineht + t_vextra ))
declare -i scrx scry scrwd scrht
eval "scrx=\$XSCR${scr}_X scry=\$XSCR${scr}_Y
while :; do
## Start a new iteration.
- if ((x + t_wd > ll)); then
+ if (( x + t_wd > ll )); then
scr=$(( scr + 1 ))
if (( scr >= XNSCR )); then
if (( n >= 3 )); then break; fi
## Make large xterms.
y=scry ht=scrht
- while ((ht - hstd >= hmin)); do
+ while (( ht - hstd >= hmin )); do
run bgclients $term $geom 80x35+$x+$y
- y="y + hstd" ht="ht - hstd" n="n + 1"
+ y=$(( y + hstd )) ht=$(( ht - hstd )) n=$(( n + 1 ))
done
## Fill the remaining space.
- if ((ht >= 2 * hmin)); then h="ht - hmin"; else h=ht; fi
- l="(h - t_vextra)/t_lineht" h="l * t_lineht + t_vextra"
+ if (( ht >= 2*hmin )); then h=$(( ht - hmin )); else h=ht; fi
+ l=$(( (h - t_vextra)/t_lineht )) h=$(( l*t_lineht + t_vextra ))
run bgclients $term $geom 80x$l+$x+$y
- y="y + h" ht="ht - h" n="n + 1"
+ y=$(( y + h )) ht=$(( ht - h )) n=$(( n + 1 ))
if ((ht >= hmin)); then
run bgclients $term $geom 80x25+$x+$y
- n="n + 1"
+ n=$(( n + 1 ))
fi
- x="x + t_wd"
+ x=$(( x + t_wd ))
done
}