-- File: WalnutWindow.Mesa
-- Created by: Willie-Sue, March 23, 1982

-- Last Edited by:
  -- Willie-Sue on July 22, 1983 12:26 pm

DIRECTORY
    DB USING [Transaction],
    Buttons USING [ButtonProc],
    Commander USING [CommandProc],
    GVRetrieve USING [MBXState],
    Icons USING [IconFlavor],
    Menus USING [Menu, MenuProc],
    WalnutViewer USING [Queue],
    WalnutDB USING [Msg, MsgSet],
    Rope USING [ROPE],
    ViewerClasses USING [Viewer];
    
WalnutWindow: CEDAR DEFINITIONS =

BEGIN OPEN WalnutDB;

ROPE: TYPE = Rope.ROPE;
Viewer: TYPE = ViewerClasses.Viewer;
Queue: TYPE = WalnutViewer.Queue;

initialActiveIconic: BOOL;
initialActiveOpen:  BOOL;
initialActiveRight: BOOL;
msgSetBorders: BOOL;
enableTailRewrite: BOOL;
excessBytesInLogFile: INT;

walnut: Viewer;
walnutQueue: Queue;

walnutSegmentFile: ROPE;
walnutLogName: ROPE;
readOnlyAccess: BOOL;
logIsAlpineFile: PUBLIC BOOL;
personalMailDB: PUBLIC BOOL;

walnutNullTrans: DB.Transaction;
iconFilePathName: ROPE;

walnutIcon: Icons.IconFlavor;
newMailIcon: Icons.IconFlavor;
msgSetIcon: Icons.IconFlavor;
msgIcon: Icons.IconFlavor;

msgSetText: Viewer;    -- the text argument for Create/Delete MsgSet
fileNameText: Viewer;    -- fileName for Archiving
mailNotifyLabel: Viewer;

walnutMenu: Menus.Menu;
workingMenu: Menus.Menu;

-- ***********************************************************
--  types & variables shared with walnutmsgsetbuttonsimpl

MsgSetButton: TYPE = REF MsgSetButtonObject;
MsgSetButtonObject: TYPE = RECORD[
        msgSet: MsgSet,
        selector, msViewer: Viewer_ NIL,
        next: MsgSetButton_ NIL,        -- list of all MsgSets
        selected: MsgSetButton_ NIL];    -- list of Selected MsgSets
----------------------------
selectedMsgSetButtons: MsgSetButton;        -- List of selected MsgSets (may be empty)
lastMsgSetButton: MsgSetButton;                -- tail of List of MsgSets (never empty)
firstMsgSetButton: MsgSetButton;
walnutRulerBefore, walnutRulerAfter, walnutTS: Viewer;

-- ***********************************************************
-- Operation on Walnut Window [WalnutWindowImpl]

RestartWalnut: PROC;

SetWalnutUpdatesPending: PROC[isDirty: BOOL];
  -- sets newversion bit on in walnut window

UncomittedUpdates: PROC RETURNS[updatesPending: BOOL];
  -- returns TRUE if uncomitted updates to database exist

UserConfirmed: PROC RETURNS[BOOL];
  -- returns TRUE if user responds Confirm

WatchMailBox: PROC[newState: GVRetrieve.MBXState];

RetrieveNewMail: PROC;
 --  checks if user has changes, then calls DoNewMail

WalnutReadMailFile: Commander.CommandProc;

WalnutExpunge: Commander.CommandProc;

WalnutScavenge: Commander.CommandProc;

WalnutNewMail: Commander.CommandProc;

WalnutDump: Commander.CommandProc;

Report: PROC[msg1, msg2, msg3, msg4: ROPE_ NIL];
  -- Prints non-omitted arguments in the Walnut window followed by CR.

ReportRope: PROC[msg1: ROPE];
  -- Similar to above, but prints one rope and doesn't print CR at end.

-- ***********************************************************
--  in WalnutExtrasImpl

--  for use by programs, goes thru walnutQueue

GetNewMail: PUBLIC PROC;
ReadMailFile: PROC[fName, msgSet: ROPE];

-- *****************
DoNewMail: PROC;
  -- retrieves new mail from Grapevine & adds it to the database
 
SizeOfMsgSetsProc: Menus.MenuProc;

DeleteMsgSetsProc: Menus.MenuProc;

PrintMsgSetsProc: Menus.MenuProc;

CreateMsgSetButtonProc: Buttons.ButtonProc;

ArchiveButtonProc: Buttons.ButtonProc;

AppendButtonProc: Buttons.ButtonProc;

DestroyAllMsgSetButtons: PROC;

-- ***********************************************************
--  these are implemented in WalnutMsgSetButtonsImpl

DisplayMsgSet: PROC[msgSet: MsgSet] RETURNS[Viewer];
  -- Walnut wants to check if a MsgSet msgSet is already being displayed

FindMSViewer: PROC[msgSet: MsgSet] RETURNS[Viewer];
  -- returns NIL if msgSet is not being displayed

ShowMsgSetButtons: PROC;
--  constructs or re-constructs the msgSetButtons in the control window;
--  "knows" where in the window the buttons belong

GetSelectedMsgSets: PROC RETURNS[msL: LIST OF MsgSetButton];
  -- the list of MsgSets the user has selected (for Add/Remove Msg operations)

DeleteMsgSetButton: PROC[msgSet: MsgSet];

CreateMsgSetProc: PROC[msName: ROPE, select: BOOL] RETURNS[nameOK: BOOL];
--  creates button for MsgSet & selects it, if select is TRUE
--  RETURNS FALSE is if name is illegal for a MsgSet

AddMsgSetButton: PROC[msgSet: MsgSet, msName: ROPE, select: BOOL];
--  adds a button for msgSet

FindMSBForMsgSet: PROC[msgSet: MsgSet] RETURNS[MsgSetButton];
--  used after rollback, to hookup any displayed message set with its MsgSetButton

END.