From 963bccac78b54134f57e17a495157ac8b254a41a Mon Sep 17 00:00:00 2001
From: Lukas Mai <l.mai@web.de>
Date: Fri, 4 Apr 2008 23:54:44 +0200
Subject: XMonad.Layout: documentation cleanup

darcs-hash:20080404215444-462cf-187ce215f00dc0e41db7eb23c1f92f4e9d80c155.gz
---
 XMonad/Layout.hs | 54 ++++++++++++++++++++++--------------------------------
 1 file changed, 22 insertions(+), 32 deletions(-)

diff --git a/XMonad/Layout.hs b/XMonad/Layout.hs
index 056dd5c..159a2d4 100644
--- a/XMonad/Layout.hs
+++ b/XMonad/Layout.hs
@@ -16,8 +16,9 @@
 -----------------------------------------------------------------------------
 
 module XMonad.Layout (
-    ChangeLayout(..), Choose, (|||), Resize(..), IncMasterN(..),
-    Full(..), Tall(..), Mirror(..), mirrorRect, splitVertically,
+    Full(..), Tall(..), Mirror(..),
+    Resize(..), IncMasterN(..), Choose, (|||), ChangeLayout(..),
+    mirrorRect, splitVertically,
     splitHorizontally, splitHorizontallyBy, splitVerticallyBy,
 
     tile
@@ -33,30 +34,23 @@ import Control.Monad
 import Data.Maybe (fromMaybe)
 
 ------------------------------------------------------------------------
--- | Builtin basic layout algorithms:
---
--- > fullscreen mode
--- > tall mode
---
--- The latter algorithms support the following operations:
---
--- >    Shrink
--- >    Expand
---
+
+-- | Change the size of the master pane.
 data Resize     = Shrink | Expand   deriving Typeable
 
--- | You can also increase the number of clients in the master pane
+-- | Increase the number of clients in the master pane.
 data IncMasterN = IncMasterN !Int    deriving Typeable
 
 instance Message Resize
 instance Message IncMasterN
 
--- | Simple fullscreen mode, just render all windows fullscreen.
+-- | Simple fullscreen mode. Renders the focused window fullscreen.
 data Full a = Full deriving (Show, Read)
 
 instance LayoutClass Full a
 
--- | The builtin tiling mode of xmonad, and its operations.
+-- | The builtin tiling mode of xmonad. Supports 'Shrink', 'Expand' and
+-- 'IncMasterN'.
 data Tall a = Tall !Int !Rational !Rational deriving (Show, Read)
                         -- TODO should be capped [0..1] ..
 
@@ -76,20 +70,18 @@ instance LayoutClass Tall a where
 
     description _ = "Tall"
 
--- | tile.  Compute the positions for windows using the default 2 pane tiling algorithm.
---
--- The screen is divided (currently) into two panes. all clients are
--- then partioned between these two panes. one pane, the `master', by
--- convention has the least number of windows in it (by default, 1).
--- the variable `nmaster' controls how many windows are rendered in the
--- master pane.
+-- | Compute the positions for windows using the default two-pane tiling
+-- algorithm.
 --
--- `delta' specifies the ratio of the screen to resize by.
---
--- 'frac' specifies what proportion of the screen to devote to the
--- master area.
---
-tile :: Rational -> Rectangle -> Int -> Int -> [Rectangle]
+-- The screen is divided into two panes. All clients are
+-- then partioned between these two panes. One pane, the master, by
+-- convention has the least number of windows in it.
+tile
+    :: Rational  -- ^ @frac@, what proportion of the screen to devote to the master area
+    -> Rectangle -- ^ @r@, the rectangle representing the screen
+    -> Int       -- ^ @nmaster@, the number of windows in the master pane
+    -> Int       -- ^ @n@, the total number of windows to tile
+    -> [Rectangle]
 tile f r nmaster n = if n <= nmaster || nmaster == 0
     then splitVertically n r
     else splitVertically nmaster r1 ++ splitVertically (n-nmaster) r2 -- two columns
@@ -118,7 +110,6 @@ splitHorizontallyBy f (Rectangle sx sy sw sh) =
 splitVerticallyBy f = (mirrorRect *** mirrorRect) . splitHorizontallyBy f . mirrorRect
 
 ------------------------------------------------------------------------
--- | Mirror a layout, compute its 90 degree rotated form.
 
 -- | Mirror a layout, compute its 90 degree rotated form.
 data Mirror l a = Mirror (l a) deriving (Show, Read)
@@ -129,7 +120,7 @@ instance LayoutClass l a => LayoutClass (Mirror l) a where
     handleMessage (Mirror l) = fmap (fmap Mirror) . handleMessage l
     description (Mirror l) = "Mirror "++ description l
 
--- | Mirror a rectangle
+-- | Mirror a rectangle.
 mirrorRect :: Rectangle -> Rectangle
 mirrorRect (Rectangle rx ry rw rh) = (Rectangle ry rx rh rw)
 
@@ -137,8 +128,6 @@ mirrorRect (Rectangle rx ry rw rh) = (Rectangle ry rx rh rw)
 -- LayoutClass selection manager
 -- Layouts that transition between other layouts
 
--- | A layout that allows users to switch between various layout options.
-
 -- | Messages to change the current layout.
 data ChangeLayout = FirstLayout | NextLayout deriving (Eq, Show, Typeable)
 
@@ -149,6 +138,7 @@ instance Message ChangeLayout
 (|||) = flip SLeft
 infixr 5 |||
 
+-- | A layout that allows users to switch between various layout options.
 data Choose l r a = SLeft  (r a) (l a)
                   | SRight (l a) (r a) deriving (Read, Show)
 
-- 
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