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|
-- This module is part of Lazymail, a Haskell email client.
--
-- Copyright (C) 2013 Raúl Benencia <rul@kalgan.cc>
--
-- 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/>.
module Screen where
import Data.List(isPrefixOf)
import UI.NCurses
import Text.ParserCombinators.Parsec.Rfc2822(Message(..))
-- Local imports
import Maildir
import Email
import Print
import Rfc1342
import State
-- | Main entry point
entryPoint :: MState -> IO ()
entryPoint st' = do
maildirs <- getMaildirsRecursively (initPath st')
putStrLn $ "We could get " ++ (show . length) maildirs ++ " maildirs."
runCurses $ do
setEcho False
(rows, columns) <- screenSize
selColID <- newColorID ColorBlack ColorWhite 1
let st = st' {
scrRows = rows - 1
, scrColumns = columns - 1
, selectedColorID = selColID
, detectedMDs = maildirs }
screenLoop st
-- | This functions will loop til the user decides to leave
screenLoop :: MState -> Curses ()
screenLoop st = do
w <- defaultWindow
updateWindow w $ do
clearMain (fromIntegral . scrRows $ st) (fromIntegral . scrColumns $ st)
drawMode (mode st) st
render
st' <- handleEvent st
if (not . exitRequested) st'
then screenLoop st'
else return ()
-- | Handle an event
-- TODO: Handle the events in a cleaner way.
handleEvent :: MState -> Curses MState
handleEvent st = loop where
loop = do
w <- defaultWindow
ev <- getEvent w Nothing
case ev of
Nothing -> loop
Just ev' -> case ev' of
EventCharacter c | c == 'q' || c == 'Q' -> return $ st { exitRequested = True }
EventSpecialKey KeyUpArrow -> return $ decSelectedRow st
EventCharacter 'k' -> return $ decSelectedRow st
EventSpecialKey KeyDownArrow -> return $ incSelectedRow st
EventCharacter 'j' -> return $ incSelectedRow st
_ -> loop
-- | Pattern match on the received mode and draw it in the screen.
drawMode :: Mode -> MState -> Update ()
drawMode MaildirMode st = drawMaildirHelper st (detectedMDs st)
drawMode EmailMode st = drawEmailHelper st
drawMode IndexMode st = drawIndexHelper 0 0 (curRow st) (colPadding st) (selectedEmails st)
-- | Helper function of drawMode
drawMaildirHelper _ [] = return ()
drawMaildirHelper st (md:mds) = do
moveCursor (curRow st) (colPadding st)
if (selectedRow st == curRow st)
then do
setColor $ selectedColorID st
drawString $ normalizeLen (fromIntegral . scrColumns $ st) md
setColor defaultColorID
else drawString $ normalizeLen (fromIntegral . scrColumns $ st) md
if curRow st < scrRows st
then drawMaildirHelper (incCurRow st) mds
else return ()
-- | Helper function of drawMode
drawIndexHelper origRow origColumn rows columns [] = moveCursor 0 0
drawIndexHelper origRow origColumn rows columns ((fp, _, msg):ts) = do
moveCursor origRow origColumn
let fs = getFields $ parseEmail msg
drawString $ show $ origRow + 1
drawString $ (ppSep ++) $ ppFlags . getFlags $ fp
drawString $ (ppSep ++) $ ppIndexNameAddr . getFrom $ fs
drawString $ (ppSep ++) $ ppIndexSubject . getSubject $ fs
if origRow < (rows - 1)
then drawIndexHelper (origRow + 1) origColumn rows columns ts
else return ()
-- | Helper function of drawMode
-- TODO: Make helpers functions to draw header and body in a separate way.
drawEmailHelper st = do
let fs = getFields $ selectedEmail st
let cropWith xs = normalizeLen $ (fromIntegral . scrColumns $ st) - (length xs)
let row = curRow st
moveCursor row (colPadding st)
drawString $ ("From: " ++) $ cropWith "From: " . ppNameAddr . getFrom $ fs
moveCursor (row + 1) (colPadding st)
drawString $ ("To: " ++) $ cropWith "To: " . ppNameAddr . getTo $ fs
moveCursor (row + 2) (colPadding st)
drawString $ ("Subject: " ++) $ cropWith "Subject: " . ppSubject . getSubject $ fs
let body = getBody $ selectedEmail st
drawBody (row + 4) (colPadding st) $ formatBody body (fromIntegral . scrColumns $ st)
where drawBody _ _ [] = return ()
drawBody row col (xs:xss) = do
moveCursor row col
drawString xs
if row < (scrRows st) then drawBody (row + 1) col xss else return ()
-- | Empty the whole window. Useful when changing modes.
clearMain rows columns = do
drawEmptyLine 0
where
drawEmptyLine currentRow = do
moveCursor currentRow 0
drawString $ replicate (columns - 1) ' '
if currentRow < (rows - 1)
then drawEmptyLine $ currentRow + 1
else return ()
-- | Convert a String to multiple Strings, cropped by the maximum column
-- size if necessary.
formatBody :: String -> Int -> [String]
formatBody body maxColumns = format [] [] body where
format parsed acc [] = parsed ++ [acc]
format parsed acc ('\r':'\n':xs) = format (parsed ++ [acc]) [] xs
format parsed acc rest@(x:xs) | length acc < maxColumns = format parsed (acc ++ [x]) xs
| otherwise = format (parsed ++ [acc]) "+" rest
|
