From d42e50abac78352cee37df0c42b967aff9d68f7c Mon Sep 17 00:00:00 2001
From: tv <tv@shackspace.de>
Date: Thu, 5 Mar 2015 15:40:39 +0100
Subject: test5: wrap lines with '='

---
 env.nix    |  1 +
 much.cabal |  2 ++
 test5.hs   | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/env.nix b/env.nix
index a79a05d..62bce8f 100644
--- a/env.nix
+++ b/env.nix
@@ -24,6 +24,7 @@ let
       email-header
       friendly-time
       hsemail
+      linebreak
       mbox
       mime-mail # because modified showAddress
       multipart
diff --git a/much.cabal b/much.cabal
index 48e95a9..0671c6e 100644
--- a/much.cabal
+++ b/much.cabal
@@ -19,6 +19,8 @@ executable much
                 , docopt >=0.6 && <0.7
                 , email-header
                 , friendly-time >=0.3 && <0.4
+                , hyphenation >=0.4 && < 0.5
+                , linebreak >=1.0 && <1.1
                 , mime-mail
                 , old-locale
                 , process >=1.2 && <1.3
diff --git a/test5.hs b/test5.hs
index 7d9c3f4..500b1c2 100644
--- a/test5.hs
+++ b/test5.hs
@@ -40,6 +40,8 @@ import System.Posix.Files
 import System.Posix.Signals
 import System.Process
 import TagUtils
+import Text.Hyphenation
+import Text.LineBreak
 import Trammel
 import TreeSearch
 import TreeView
@@ -264,6 +266,38 @@ keymap "\ESC[Z" = moveCursorUpToPrevUnread -- S-Tab
 keymap "\t" = moveCursorDownToNextUnread
 keymap "\DEL" = moveToParent  -- backspace
 
+-- TODO wrap/unwrap to separate module
+keymap "=" = \q@State{..} ->
+    let cursor' = case Z.label cursor of
+            TVMessageLine a b c s ->
+                wrap (TVMessageLine a b c) cursor s
+            _ -> cursor
+    in return q { cursor = cursor' }
+  where
+
+    --unwrap = error "WIP"
+        -- 1. get current id (must be TVMessageLine)
+        -- 2. find first adjoined TVMessageLine with same id
+        -- 3. find last adjoined TVMessageLine with same id
+        -- 4. join lines (with space?)
+
+    wrap ctor loc s =
+        fromMaybe (error "die hard") $
+        Z.nextTree $
+        foldr (insert . ctor)
+              (Z.delete loc)
+              $ hy s
+
+    insert a =
+        Z.prevSpace . Z.insert (Tree.Node a [])
+
+    hy s =
+        breakStringLn bf s
+      where
+        shy = '\173'
+        hyp = Just german_1996
+        bf = BreakFormat 80 8 shy hyp
+
 keymap "\ESCq" = \q@State{..} ->
     let parse = filter (/='\n') -- TODO proper parse
         draft = fromMaybe "" $ getSearchTerm $ Z.label $ Z.root cursor
-- 
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