1 files changed, 126 insertions, 0 deletions
diff --git a/src/Lazymail/State.hs b/src/Lazymail/State.hs
new file mode 100644
index 0000000..06353da
--- /dev/null
+++ b/src/Lazymail/State.hs
@@ -0,0 +1,126 @@
+{- Lazymail state, and operations on it.
+ -
+ - Copyright 2013 Raúl Benencia <rul@kalgan.cc>
+ -
+ - Licensed under the GNU GPL version 3 or higher
+ -
+ -}
+
+module Lazymail.State where
+
+import Codec.MIME.Type(MIMEValue, nullMIMEValue)
+import Text.ParserCombinators.Parsec.Rfc2822(Message, GenericMessage(..))
+import UI.NCurses(ColorID(..), defaultColorID)
+import Network.Email.Mailbox(Flag(..), Flags)
+import System.FilePath
+
+import Lazymail.Types
+
+initialState = LazymailState {
+    mode          = MaildirMode
+  , basePath      = ""
+  , screenRows    = 0
+  , screenColumns = 0
+  , currentRow    = 0
+  , columnPadding = 0
+  , exitRequested = False
+  , statusBar     = True
+  , maildirState  = initialMaildirState
+  , indexState    = initialIndexState
+  , composeState  = initialComposeState
+  , emailState    = initialEmailState
+  , colorStyle    = initialColorStyle
+}
+
+initialMaildirState = MaildirState {
+    selectedRowMD   = 0
+  , selectedMD      = ""
+  , detectedMDs     = []
+  , scrollRowMD     = 0
+  , scrollBufferMD  = []
+  , triggerUpdateMD = False
+}
+
+initialIndexState = IndexState {
+    selectedRowIn      = 0
+  , selectedEmailPath  = ""
+  , selectedEmails     = []
+  , scrollRowIn        = 0
+  , currentInLen       = 0
+  , scrollBufferIn     = []
+  , triggerUpdateIn    = False
+}
+
+initialEmailState = EmailState {
+    scrollRowEm    = 0
+  , bodyStartRow  = 0
+  , emailLines     = []
+  , currentEmail   = nullMIMEValue
+}
+
+initialComposeState = ComposeState {
+    composition = Nothing
+}
+
+initialColorStyle = ColorStyle {
+    baseColorID      = defaultColorID
+  , selectionColorID = defaultColorID
+  , statusBarColorID = defaultColorID
+  , headerColorID    = defaultColorID
+  , newEmailColorID  = defaultColorID
+}
+
+scrColsAsInteger st = toInteger $ screenColumns st
+scrRowsAsInteger st = toInteger $ screenRows st
+curRowAsInteger  st = toInteger $ currentRow st
+colPadAsInteger  st = toInteger $ columnPadding st
+
+
+incrementSelectedRow st | (selectedRow st) < limit =
+  case (mode st) of
+    MaildirMode ->
+      let
+        sr = (selectedRowMD . maildirState) st
+        maildirState' = (maildirState st) { selectedRowMD = sr + 1 }
+      in
+       st { maildirState = maildirState' }
+    IndexMode ->
+      let
+        sr = (selectedRowIn . indexState) st
+        indexState' = (indexState st) { selectedRowIn = sr + 1 }
+      in
+       st { indexState = indexState' }
+    _ -> st
+                        | otherwise = st
+  where
+    scrRows = screenRows st
+    curInLen = length $ selectedEmails . indexState $ st
+    curMDLen = length $ detectedMDs . maildirState $ st
+    limit' = case (mode st) of
+      MaildirMode -> if curMDLen < scrRows then curMDLen - 1 else scrRows
+      IndexMode   -> if curInLen < scrRows then curInLen - 1 else scrRows
+    limit = if (statusBar st) && (limit' == scrRows)
+            then fromIntegral $ limit' - 2
+            else fromIntegral limit'
+
+decrementSelectedRow st | (selectedRow st) > 0 =
+  case (mode st) of
+    MaildirMode ->
+      let
+        sr = (selectedRowMD . maildirState) st
+        maildirState' = (maildirState st) { selectedRowMD = sr - 1 }
+      in
+       st { maildirState = maildirState' }
+    IndexMode ->
+      let
+        sr = (selectedRowIn . indexState) st
+        indexState' = (indexState st) { selectedRowIn = sr - 1 }
+      in
+       st { indexState = indexState' }
+    _ -> st
+                        | otherwise = st
+
+selectedRow st = case (mode st) of
+      MaildirMode -> selectedRowMD . maildirState $ st
+      IndexMode   -> selectedRowIn . indexState   $ st
+