How to reconfigure the 1..9 workspace keyboard shortcuts in XMonad?

Question

I have been a long time user of XMonad until I switched to an ergonomic keyboard layout, namely the Bépo (http://bepo.fr/wiki/Accueil).

Until thenI was using the XMonad.Config.Azerty module for my keyboard. But since the layout change the keyboard shorcuts were broken.
More exactly the workpaces switching ones (home+1=workspace1, home+2=workspace2, etc...).
I then switched back to the default config but it was not better.

I obviously does not need the defaultAzerty function anymore.
Does someone know what should I be doing to remap the home +1..9 combinaison so that they work.

EDIT : updated config

Here is my config :

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE Arrows #-}

import XMonad
import Graphics.X11.ExtraTypes.XF86
import qualified Data.Map as M
import qualified XMonad.StackSet as W
import XMonad.Hooks.DynamicLog
--
import XMonad.Layout.NoBorders
--
import Data.Ratio
import XMonad.Layout.PerWorkspace
import XMonad.Layout.Spacing
import XMonad.Layout.Grid
import XMonad.Layout.IM

main :: IO ()
main = xmonad =<< xmobar myConf

-- |Main configuration, override the defaults to your liking.
myConf = defaultConfig
   { modMask = mod4Mask
   , terminal = "urxvt"
   , layoutHook = smartBorders $ myLayout
   , workspaces = myWorkspaces
   , keys = myKeys }

-- | Keyboard keys
homeMask :: KeyMask
homeMask =  133 -- from the xev data

keysToAdd x =
    [ ((mod4Mask, xK_F4 ), kill)
    , ((0, xF86XK_Calculator ), spawn "mate-calculator")
    , ((0, xF86XK_WWW ), spawn "firefox")
    , ((0, xF86XK_HomePage ), spawn "caja")
    , ((0, xK_Print ), spawn "mate-screenshot")
    , ((mod4Mask, xK_z ), spawn "emacs") ]
    ++
    [((m .|. homeMask, k), windows $ f i) 
       | (i, k) <- zip (XMonad.workspaces defaultConfig) [10 .. 19]
       , (f, m) <- [(W.greedyView, 0), (W.shift, shiftMask)] ]

keysToDel x = [((mod4Mask .|. shiftMask), xK_c)] -- to delete the unused keys

myKeys x = foldr M.delete (keysToAdd' x) (keysToDel x)
  where
    -- to include new keys to existing keys
    keysToAdd' x = M.union (keys defaultConfig x) (M.fromList (keysToAdd x))

-- |Workspaces listing
myWorkspaces = ["1:main", "2:edit", "3:web", "4:browse", "5:irc", "6:pidgin"]

-- |Default layout
myLayout = pidgin $ Mirror tiled ||| tiled ||| Full
    where
        -- pidgin conf
        pidgin = onWorkspace "6:pidgin" pidginLayout
        pidginLayout = withIM (18/100) (Role "buddy_list") gridLayout
        gridLayout = spacing 8 $ Grid

        -- default tiling algorithm partitions the screen into two panes
        tiled = spacing 2 $ Tall nmaster delta ratio
        -- The default number of windows in the master pane
        nmaster = 1
        -- Default proportion of screen occupied by master pane
        ratio = 2/3
        -- Percent of screen to increment by when resizing panes
        delta = 5/100

Also I saw that post but I don't know if it is what I want : Switching workspaces in xmonad using programmer dvorak keyboard layout (shifted numbers)

I have no problem with the haskell language but the XMonad API is that big.

EDIT2 : following what is written here http://blacketernal.wordpress.com/set-up-key-mappings-with-xmodmap/, my home key is already a modifier

Here is the dump of the last lines :

xmodmap: up to 4 keys per modifier, (keycodes in parentheses):

shift Shift_L (0x32), Shift_R (0x3e) lock Caps_Lock (0x42) control Control_L (0x25), Control_R (0x69) mod1
Alt_L (0x40), Meta_L (0xcd) mod2 Num_Lock (0x4d) mod3
mod4 Super_L (0x85), Super_R (0x86), Super_L (0xce), Hyper_L (0xcf) mod5 ISO_Level3_Shift (0x5c), Mode_switch (0xcb)

Answer 1

The basic approach I use is to launch xev, type the key combination that you want to do something, and notice what keysyms show up. If I understand correctly, you want to type Home+1 to take you to workspace 1. When I tried that, I get the following, but your results are probably different.

KeyRelease event, serial 33, synthetic NO, window 0x2600001,
    root 0x1dc, subw 0x0, time 255407786, (1090,771), root:(1093,774),
    state 0x0, keycode 10 (keysym 0x31, 1), same_screen YES,
    XLookupString gives 1 bytes: (31) "1"
    XFilterEvent returns: False

KeyRelease event, serial 33, synthetic NO, window 0x2600001,
    root 0x1dc, subw 0x0, time 255407938, (1090,771), root:(1093,774),
    state 0x0, keycode 110 (keysym 0xff50, Home), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

Next you add the appropriate hook to your xmonad. Looking at that post you referenced, maybe something like this would work?

homeMask              :: KeyMask
homeMask              =  110 -- from the xev data

[((m .|. homeMask, k), windows $ f i)
    | (i, k) <- zip (XMonad.workspaces conf) [xK_1 .. xK_9]
    , (f, m) <- [(W.greedyView, 0), (W.shift, shiftMask)]

---

EDIT: Before you go too far debugging this, perhaps a simpler test is in order to make sure we have the Home key trapped properly. Add the following to your config:

homeMask              :: KeyMask
homeMask              =  110 -- from the xev data

And put this in the keysToAdd in your config:

, ((homeMask, xK_z                    ), spawn "emacs")

Now restart XMonad and see if Home+z launches emacs.