Numerous changes and a restructure of .xinitrc to allow .vnc/xstartup to piggy back off of it

and offer a window manager selection dialog for remote/nested sessions

.vnc/xstartup:
  * runs pekwm and a xdialog to choose a wm; then runs "$HOME/.xinitrc wm-name remote" where
    wm-name is a lower-case window manager name (corresponding to a exectuable in $PATH)
  * see TODO at the head of the document for things to be completed
  * ISSUE: xmonad is a binary executable so there is no way to pass it a special configuration
    for a single monitor setup (for a remote session). Instead there should be a single-head
    xmonad compiled to run on remote sessions; the question is how?
.xinitrc:
  * massively restructured and now has a slightly different usage (see head of document)
  * still supports being run without command-line parameters and by slim (passed one cl parameter
    being the window manager (again in lower case and corresponding to a executable in $PATH)
.xmonad/xmonad.hs:
  * added a new manage hook for opennx
  * added a new floating manage hook doMaxFloat (thanks to OODavo) which can float windows
    that request a size smaller then the area their widgets span

Signed-off-by: Collin Doering <rekahsoft@gmail.com>

.vnc/xstartup

@@ -0,0 +1,67 @@
+#!/bin/sh
+
+# (C) Copyright Collin Doering @!@YEAR@!@
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# File: .vnc/xstartup
+# Author: Collin J. Doering <rekahsoft@gmail.com>
+# Date: Jul 12, 2012
+# Description: Acts as a window-manager selector for vnc/freenx sessions
+
+# TODO: - use retval in the case that Xdialog fails to display some message/log
+#       - remove use of retval for window close and cancel button as they're disabled
+#       - support a nicer way to add wm's to the radiolist
+#       - a custom pekwm config so that there are no clicky menus and such
+
+# Set desktop default size
+xrandr --output default --mode 640x480
+
+# Start pekwm and keep its pid
+pekwm &
+PEKWM_PID=$!
+
+# Offer a Xdialog session selector
+Xdialog --title "Session Selection" \
+        --no-cancel \
+        --no-close \
+        --radiolist "Choose a session to run:" 25 112 5 \
+            "XMonad" "a dynamically tiling X11 window manager" off \
+            "OpenBox" "a highly configurable, next generation WM with extensive standards support" off \
+            "PekWM" "a window manager that once up on a time was based on the aewm++ window manager" off \
+            "Awesome" "a highly configurable, next generation framework window manager for X" off \
+            "StumpWM" "a tiling, keyboard driven X11 Window Manager written entirely in Common Lisp" ON 2>/tmp/wmlist.tmp.$$
+
+# Retain the return value of Xdialog and its choices saved in /tmp/wmlist.tmp.pid where pid is the pid of this shell
+retval=$?
+choice=`cat /tmp/wmlist.tmp.$$ | tr '[A-Z]' '[a-z]'`
+
+# Remove the temporary file containing Xdialogs choices
+rm -f /tmp/wmlist.tmp.$$
+
+# Stop pekwm
+kill $PEKWM_PID
+
+# Run a session depending on the return value and choice from Xdialog
+case $retval in
+  0)
+    exec $HOME/.xinitrc $choice remote
+    ;;
+  # 1)
+  #   echo "Cancel pressed."
+  #   ;;
+  # 255)
+  #   echo "Box closed."
+  #   ;;
+esac

.xinitrc

@@ -6,48 +6,79 @@
 
 # GENERIC #
 
-# Set the default curson used by xmonad
-xsetroot -cursor_name left_ptr
-
-# Setup monitors
-xrandr --output DVI-I-1 --auto --output DVI-I-2 --auto --left-of DVI-I-1
-
-# Start xscreensaver
-xscreensaver -no-splash &
-
-# Set a desktop background
-nitrogen --restore &
-
-# Have mouse pointer hide after 5 seconds
-unclutter &
-
-# Setup system tray *DISABLED* :: whats the point of a systray if no apps use it?
-#trayer --monitor 1 --edge top --align right --expand true --width 4 --height 2 --transparent true --tint 0x000000 &
-
-# Use xbindkeys to bind media keys etc..
-xbindkeys &
+# Usage: .xinitrc [window-manager] [session-type]
+#  where: window-manager is one of '(xmonad openbox stumpwm awesome pekwm)
+#         session-type is either "" or "remote"
 
-# Start pulseaudio
-#start-pulseaudio-x11 &
+# Set the default curson used by all WM's
+xsetroot -cursor_name left_ptr
 
-# Start-up applications
-parcellite &
-emacs --daemon &
-urxvtd --quiet &
-xcompmgr &
+# Initialize a local desktop session (run generic helper applications)
+function init_local_session() {
+    # Setup monitors
+    xrandr --output DVI-I-1 --auto --output DVI-I-2 --auto --left-of DVI-I-1
+    
+    # Start xscreensaver
+    xscreensaver -no-splash &
+    
+    # Set a desktop background
+    nitrogen --restore &
 
-# Create variable GENERAL_SCREEN which is the pid of a screen called "general"
-export GENERAL_SCREEN=`screen -ls | grep general | cut -f1 -d'.' | sed 's/\W//g'`
+    # Have mouse pointer hide after 5 seconds
+    unclutter &
+    
+    # Setup system tray *DISABLED* :: whats the point of a systray if no apps use it?
+    #trayer --monitor 1 --edge top --align right --expand true --width 4 --height 2 --transparent true --tint 0x000000 &
+        
+    # Use xbindkeys to bind media keys etc..
+    xbindkeys &
+    
+    # Start pulseaudio
+    #start-pulseaudio-x11 &
+    
+    # Start-up applications
+    #parcellite &
+    emacs --daemon &
+    urxvtd --quiet &
+    xcompmgr &
+    
+    # Create variable GENERAL_SCREEN which is the pid of a screen called "general"
+    export GENERAL_SCREEN=`screen -ls | grep general | cut -f1 -d'.' | sed 's/\W//g'`
+    
+    # Check to see if a general screen is already running
+    if [ "x$GENERAL_SCREEN" == "x" ]; then
+        screen -dmS general & 
+    fi
+    
+    # Set the default wm to xmonad
+    DEFAULT_WM=xmonad
+}
 
-# Check to see if a general screen is already running
-if [ "x$GENERAL_SCREEN" == "x" ]; then
-    screen -dmS general & 
-fi
+# Initialize a remote desktop session (run generic helper applications)
+function init_remote_session() {
+    # Set desktop background
+    feh --bg-scale ~/.wallback/Cocaine_Wallpaper_II_by_mdornfeld.png &
+    
+    # Set the default wm to xmonad
+    DEFAULT_WM=stumpwm
+}
 
-# Set the default session to xmonad
-DEFAULT_SESSION=xmonad
+# Check the second cl parameter which denotes the session-type (E.g. remote, local)
+case $2 in
+    # Remote session
+    remote)
+	init_remote_session
+	break
+	;;
+    # Local session or unspecified
+    *)
+	init_local_session
+        ;;
+esac
 
-# Check the given parameter from slim to determine the session being requested by slim/the user
+# Check the first cl parameter which denotes the window-manager to use
+# Notice: in each case expression below "exec app" hands over execution to some app thus
+#          ceasing execution in this script so no "break" is required
 case $1 in
     xmonad)
 	exec xmonad
@@ -58,7 +89,13 @@ case $1 in
     stumpwm)
 	exec stumpwm
 	;;
+    awesome)
+	exec awesome
+	;;
+    pekwm)
+	exec pekwm
+	;;
     *)
-	exec $DEFAULT_SESSION
+	exec $DEFAULT_WM
 	;;
 esac

.xmonad/xmonad.hs

@@ -227,7 +227,7 @@ myGenericKeys =
     , ((modm .|. controlMask, xK_e), spawn "emacsclient -c")
 
     -- Launch tuxcmd
-    , ((modm .|. controlMask, xK_t), spawn "tucmd")
+    --, ((modm .|. controlMask, xK_t), spawn "tuxcmd")
     
     -- Launch zathura
     , ((modm .|. controlMask, xK_z), spawn "zathura")
@@ -245,11 +245,14 @@ myGenericKeys =
     , ((modm .|. controlMask, xK_1), namedScratchpadAction scratchpads "screen-terminal")
       
     -- Launch a maintainance scratchpad 
-    , ((modm .|. controlMask, xK_2), namedScratchpadAction scratchpads "maintainance-terminal")
+    , ((modm .|. controlMask, xK_2), namedScratchpadAction scratchpads "maintenance-terminal")
 
     -- Launch MC scratchpad
     , ((modm .|. controlMask, xK_3), namedScratchpadAction scratchpads "mc-scratch")
 
+    -- Launch MC scratchpad
+    , ((modm .|. controlMask, xK_4), namedScratchpadAction scratchpads "pavucontrol-scratch")
+
     -- Select window from dmenu and go to the workspace its on
     , ((modm .|. shiftMask, xK_g), gotoMenuArgs ["-i","-nb", "#040404","-nf","#00FFFF","-sf","#ffa0ff","-sb","#000000"])
       
@@ -343,7 +346,18 @@ myLayout = smartBorders . avoidStruts $
  
     -- Percent of screen to increment by when resizing panes
     delta   = 3/100
- 
+
+------------------------------------------------------------------------
+-- Thanks to OODavo from #haskell on freenode; used for applications
+-- that do not doFullFloat well (they request a window size smaller
+-- then the widgets they contain)
+maxFloat = flip W.float $ rectWithBorder 0.05
+    where rectWithBorder x = let lt = x
+                                 wh = 1 - 2*x
+                                 in W.RationalRect lt lt wh wh
+
+doMaxFloat = ask >>= doF . maxFloat
+
 ------------------------------------------------------------------------
 -- Window rules:
  
@@ -365,35 +379,39 @@ myManageHook = composeAll
 --    , title =? "DOOM 3" --> doIgnore
     , resource =? "Qt-subapplication" <&&> title /=? "Oracle VM VirtualBox Manager" --> doFloat
     , resource =? "vncviewer" --> doCenterFloat
+    , resource =? "opennx" --> doMaxFloat
     , resource =? "Steam.exe" --> doCenterFloat
-    , title =? "Xnest" --> doCenterFloat  
+    , title =? "Xnest" --> doCenterFloat
 --    , resource =? "hl2.exe" --> doCenterFloat  
     , isFullscreen --> (doF W.focusDown <+> doFullFloat)
     , resource  =? "desktop_window" --> doIgnore ] <+> namedScratchpadManageHook scratchpads <+> manageDocks
 
 -- NamedScratchPad Hook
 scratchpads = [ NS "emacs-scratch" spawnEmacsScratch findEmacsScratch manageEmacsScratch
-                , NS "maintainance-terminal" spawnMaintainanceTerminal findMaintainanceTerminal manageMaintainanceTerminal
+                , NS "maintenance-terminal" spawnMaintenanceTerminal findMaintenanceTerminal manageMaintenanceTerminal
                 , NS "screen-terminal" spawnScreenTerminal findScreenTerminal manageScreenTerminal
-                , NS "mc-scratch" spawnMcScratch findMcScratch manageMcScratch]
+                , NS "mc-scratch" spawnMcScratch findMcScratch manageMcScratch
+                , NS "pavucontrol-scratch" spawnPavucontrolScratch findPavucontrolScratch managePavucontrolScratch]
                 where
                   findEmacsScratch = resource =? "emacs-scratch"
-                  findMaintainanceTerminal = resource =? "scratchpad"
+                  findMaintenanceTerminal = resource =? "scratchpad"
                   findScreenTerminal = resource =? "screen-scratch"
                   findMcScratch = resource =? "mc-scratch"
-                  
+                  findPavucontrolScratch = resource =? "pavucontrol"
+
                   spawnEmacsScratch = myTerminal ++ " -name emacs-scratch -pe -tabbedex -e emacsclient -nw"
-                  spawnMaintainanceTerminal = myTerminal ++ " -name scratchpad"
+                  spawnMaintenanceTerminal = myTerminal ++ " -name scratchpad"
                   spawnScreenTerminal = myTerminal ++ " -name screen-scratch -bg black"
                   spawnMcScratch = myTerminal ++ " -name mc-scratch -pe -tabbedex -e mc"
-                  
+                  spawnPavucontrolScratch = "pavucontrol"
+
                   manageEmacsScratch = customFloating $ W.RationalRect l t w h
                     where
                       h = 0.65     -- terminal height (%)
                       w = 0.55     -- terminal width (%)
                       t = 1 - h    -- distance from top edge (%)
                       l = 1 - w    -- distance from left edge (%)
-                  manageMaintainanceTerminal = customFloating $ W.RationalRect l t w h
+                  manageMaintenanceTerminal = customFloating $ W.RationalRect l t w h
                     where
                       h = 0.33     -- terminal height (%)
                       w = 1        -- terminal width (%)
@@ -411,6 +429,12 @@ scratchpads = [ NS "emacs-scratch" spawnEmacsScratch findEmacsScratch manageEmac
                       w = 0.55     -- terminal width (%)
                       t = 1 - h    -- distance from top edge (%)
                       l = 1 - w    -- distance from left edge (%)
+                  managePavucontrolScratch = customFloating $ W.RationalRect l t w h
+                    where
+                      h = 0.80     -- terminal height (%)
+                      w = 0.55     -- terminal width (%)
+                      t = 1 - h    -- distance from top edge (%)
+                      l = 1 - w    -- distance from left edge (%)
 
 ------------------------------------------------------------------------
 -- Event handling