Compose mode

1 files changed, 56 insertions, 0 deletions

diff --git a/src/Lazymail/Utils.hs b/src/Lazymail/Utils.hs
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+++ b/src/Lazymail/Utils.hs
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+{- Miscellaneous functions written apart in order to avoid
+ - cyclics module imports
+ -
+ - Copyright 2013 Raúl Benencia <rul@kalgan.cc>
+ -
+ - Licensed under the GNU GPL version 3 or higher
+ -}
+
+module Lazymail.Utils ( newDialogWindow, drawNotification
+                      , liftCurses, drawCroppedString
+                      ) where
+
+import Control.Monad.Trans ( liftIO )
+import Control.Monad.Reader
+import Control.Monad.State
+import UI.NCurses
+
+import Lazymail.Print
+import Lazymail.Types
+import Lazymail.State
+
+newDialogWindow :: LazymailState -> Curses (Integer, Integer, Window)
+newDialogWindow st =
+  let rows        = 3
+      cols st     = 9 * ((scrColsAsInteger st) `div` 10)
+      startCol st = 2 * ((scrColsAsInteger st) `div` 20)
+      startRow st = (div (scrRowsAsInteger st) 2) - 1
+  in do
+    w <- newWindow 3 (cols st) (startRow st) (startCol st)
+    updateWindow w $ drawBox Nothing Nothing
+    render
+    return (rows, cols st, w)
+
+drawNotification :: String -> LazymailCurses ()
+drawNotification errorMessage = do
+  st <- get
+  (_, cols, w) <- liftCurses $ newDialogWindow st
+  liftCurses $ do
+    updateWindow w $ do
+      moveCursor 1 1
+      drawString errorMessage
+    render
+    waitFor w (\ev -> ev == EventCharacter 'q' || ev == EventCharacter 'Q' || ev == EventCharacter '\n')
+    closeWindow w
+
+waitFor :: Window -> (Event -> Bool) -> Curses ()
+waitFor w p = loop where
+    loop = do
+        ev <- getEvent w Nothing
+        case ev of
+            Nothing -> loop
+            Just ev' -> if p ev' then return () else loop
+
+liftCurses = lift . lift
+
+drawCroppedString st str = drawString $ normalizeLen (screenColumns st) str