X-Git-Url: https://git.distorted.org.uk/~mdw/profile/blobdiff_plain/bfdee8c36e31700e3c744c68489cc8de2c4e2c12..807c317e99426f8379fc55fc4d4bc98e67ec0f41:/dot/xinitrc

diff --git a/dot/xinitrc b/dot/xinitrc
index 87e5bbd..89105c1 100755
--- a/dot/xinitrc
+++ b/dot/xinitrc
@@ -108,13 +108,27 @@ fi
 ### Iniitial settings.
 
 ## Assume X sessions are secure.
-export __mdw_sechost="`hostname`"
+export __mdw_sechost="$(hostname)"
+
+## Tell things that XFCE is in charge.  This is the most desktoppy thing that
+## I run, so it's not entirely wrong.
+: ${XDG_CURRENT_DESKTOP=XFCE}; export XDG_CURRENT_DESKTOP
 
 ## Obtain the screen dimensions.
 case ",$XWIDTH,$XHEIGHT," in
-  *,,*) eval $(xscsize -bx) ;;
+  *,,*) eval $(xscsize -bx; xscsize -bmx) ;;
+esac
+case ",$XNSCR," in
+  ,,)
+    XNSCR=1 XSCR0_X=0 XSCR0_Y=0 XSCR0_WIDTH=$XWIDTH XSCR0_HEIGHT=$XHEIGHT
+    ;;
 esac
-info "screen size = $XWIDTH x $XHEIGHT"
+i=0; while (( i < XNSCR )); do
+  eval "x=\$XSCR${i}_X y=\$XSCR${i}_Y
+	wd=\$XSCR${i}_WIDTH ht=\$XSCR${i}_HEIGHT"
+  info "screen #$i = ${wd}x${ht}+${x}+${y}"
+  i=$(( i + 1 ))
+done
 
 initialize () {
   ## Load the X resource database.
@@ -206,56 +220,106 @@ start-clients () {
 ### Main screen layout.
 
 ## Choose appropriate clients.
-emacs=$(pick_program emacs emacs23 emacs22 emacs21 emacs)
+emacs=$(pick_program emacs \
+  emacs24-lucid emacs23-lucid emacs24 emacs23 emacs22 emacs21 \
+  emacs-lucid emacs)
 term=$(pick_program terminal pterm Eterm xterm)
 
-## Emacs window measurements.
-case "$emacs" in
-  emacs21 | emacs)
-    e_colwd=492 e_hextra=34
-    e_colchars=82 e_cextra=-2
-    e_lineht=13 e_vextra=52
+## If we fell back to an unversioned Emacs binary, then figure out what
+## version it actually is.
+case $emacs in
+  emacs | emacs-lucid)
+    set -- $($emacs --version | head -n1)
+    e_ver=emacs${3%%.*}${emacs#emacs}
     ;;
-  emacs22 | emacs23)
-    e_colwd=492 e_hextra=8
-    e_colchars=82 e_cextra=-6
-    e_lineht=13 e_vextra=46
+  *)
+    e_ver=$emacs
     ;;
 esac
+info emacs-version = $e_ver
+
+## Emacs window measurements.
+##
+## e_colsz = width of a column in characters (from `emacs-width' metaconfig)
+## e_charwd = width of a character in pixels (assume `6x13')
+## e_colextra = additional per-column overhead in pixels
+## e_colextrachars = additional per-column overhead in character units
+## e_colwd = basic width of a column in pixels
+## e_hextra = extra horizontal width in pixels
+##	Width of an N-column Emacs frame in pixels will be
+##	N*e_colwd + e_hextra
+## e_colchars = width of a column in Emacs `-geometry' units
+## e_cextra = extra horizontal width in Emacs `-geometry' units
+##	So an N-column frame should be reported to Emacs as being
+##	N*e_colchars + e_cextra geometry units wide
+## e_lineht = height of a character line in pixels
+## e_vextra = number of additional vertical cruft pixels
+##	So an N-line Emacs frame takes N*e_lineht + e_vextra pixels
+e_colsz=$(mdw-conf emacs-width 77) e_charwd=6
+e_colextra=30 e_colextrachars=5 e_lineht=13
+case "$e_ver" in
+  emacs21 | emacs) e_hextra=34 e_cextra=-2 e_vextra=52 ;;
+  emacs22 | emacs23) e_hextra=8 e_cextra=-6 e_vextra=46 ;;
+  emacs24) e_hextra=5 e_cextra=-6 e_vextra=42 ;;
+  emacs23-lucid) e_hextra=7 e_cextra=-6 e_vextra=48 ;;
+  emacs24-lucid) e_hextra=7 e_cextra=-5 e_vextra=48 ;;
+  emacs26-lucid) e_hextra=5 e_cextra=-6 e_vextra=51 ;;
+esac
+e_colwd=$(( e_colsz*e_charwd + e_colextra ))
+e_colchars=$(( e_colsz + e_colextrachars ))
 
 ## Terminal window measurements.
+##
+## t_wd = the window width, in pixels
+## t_lineht, t_vextra = height parameters: if the window is N lines high,
+##	then it will be N*t_lineht + t_vextra pixels high
 case "$term" in
-  pterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-geometry;;
+  pterm)
+    ## The pterm width differs according to whether it's linked against Gtk 2
+    ## or 3.  Let's find out...
+    case $(ldd $(command -v pterm) | grep libgtk) in
+      *libgtk-2* | *libgtk-x11-2*) t_wd=504 ;;
+      *) t_wd=503 ;;
+    esac
+   t_lineht=13 t_vextra=23 geom=-geometry;;
   Eterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-g;;
   xterm) t_wd=507 t_lineht=13 t_vextra=27 geom=-geometry;;
 esac
 
 ## GNOME stuff measurements.
-declare -i xbound="XWIDTH - 113"
+declare -i panelwd=64 xbound=$(( XWIDTH - panelwd ))
 
 ## 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.
-
-declare -i ecols="(xbound - t_wd - e_hextra)/e_colwd"
-if (( ecols < 2 && xbound > e_colwd * 2 + e_hextra )); then
-  ecols=2
-elif (( ecols < 1 )); then
-  ecols=1
+## 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 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 \
-    $emacs -bg black -geometry ${emacsx}x${emacsy}+0+0
+    $emacs -bg black -geometry ${emacsx}x${emacsy}+${XSCR0_X}+${XSCR0_Y} \
+    --mdw-splashy-startup
 }
 
 ## Now place some xterms.
@@ -271,36 +335,50 @@ start-emacs () {
 start-xterms () {
 
   ## Initialize some parameters.
-  declare -i x="ecols * e_colwd + e_hextra" xb=xbound
-  declare -i n=0 pgx=0 l h y ht
-  declare -i hstd="35 * t_lineht + t_vextra" hmin="25 * t_lineht + t_vextra"
+  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 ))
+  declare -i hmin=$(( 25*t_lineht + t_vextra ))
+  declare -i scrx scry scrwd scrht
+
+  eval "scrx=\$XSCR${scr}_X scry=\$XSCR${scr}_Y
+	scrwd=\$XSCR${scr}_WIDTH scrht=\$XSCR${scr}_HEIGHT"
 
   ## Do the placement.
   while :; do
 
     ## Start a new iteration.
-    if ((x + t_wd > xb)); then
-      if ((n >= 3)); then break; fi
-      x="pgx + XWIDTH" pgx="pgx + XWIDTH" xb="xb + XWIDTH"
+    if (( x + t_wd > ll )); then
+      scr=$(( scr + 1 ))
+      if (( scr >= XNSCR )); then
+	if (( n >= 3 )); then break; fi
+	pgx=$(( pgx + XWIDTH )) xb=$(( xb + XWIDTH ))
+	scr=0
+      fi
+      eval "scrx=\$XSCR${scr}_X scry=\$XSCR${scr}_Y
+	    scrwd=\$XSCR${scr}_WIDTH scrht=\$XSCR${scr}_HEIGHT"
+      x=$(( pgx + scrx ))
+      ll=$(( x + scrwd ))
+      if (( ll > xb )); then ll=xb; fi
     fi
 
     ## Make large xterms.
-    y=0 ht=XHEIGHT
-    while ((ht - hstd >= hmin)); do
+    y=scry ht=scrht
+    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
 }
 
@@ -363,7 +441,7 @@ EOF
 	eval "${line#!}"
 	;;
       *)
-	set -- $line
+	eval "set -- $line"
 	run bgclients "$@"
 	;;
     esac