eudora-mac/oops.c

/* Copyright (c) 2017, Computer History Museum 
All rights reserved. 
Redistribution and use in source and binary forms, with or without modification, are permitted (subject to 
the limitations in the disclaimer below) provided that the following conditions are met: 
 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following 
   disclaimer in the documentation and/or other materials provided with the distribution. 
 * Neither the name of Computer History Museum nor the names of its contributors may be used to endorse or promote products 
   derived from this software without specific prior written permission. 
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE 
COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 
DAMAGE. */

#include "oops.h"
#define FILE_NUM 40
/* Copyright (c) 1990-1992 by the University of Illinois Board of Trustees */
/************************************************************************
 * routines for undoing editing changes
 ************************************************************************/

#pragma segment Main

Boolean IsTransferUndo(void);
short IsTextUndo(MyWindowPtr win);
void TextUndo(void);
void TransferUndo(void);
static OSErr AddXfUndoSum(TOCHandle fromTocH, TOCHandle toTocH, short sumNum, Boolean open);
static OSErr TransferUndoBox(XfUndoPtr pxfu, short *pCount, uLong *pTicks);
OSErr IMAPTransferDeleteUndo(TOCHandle toTocH, TOCHandle fromTocH, XfUndoPtr pxfu);

/************************************************************************
 * DoUndo - undo the last undoable operation
 ************************************************************************/
void DoUndo(void)
{
	MyWindowPtr win = GetWindowMyWindowPtr(FrontWindow_());
	OSErr err;
	
#ifdef TWO
	if (IsTextUndo(win))
	{
		if (err=PeteEdit(win,win->pte,peeUndo,nil))
			WarnUser(PETE_ERR,err);
	}
	else if (IsTransferUndo()) TransferUndo();
#endif
}

#ifdef TWO
/************************************************************************
 * TransferUndo - undo the last xfer for a mailbox
 ************************************************************************/
static OSErr TransferUndoBox(XfUndoPtr pxfu, short *allCount, uLong *pTicks)
{
	XfUndo xfu = *pxfu;
	TOCHandle fromTocH,toTocH;
	short err=0;
	long sumNum;
	long origCount;
	short	count;
	
#ifdef NEVER
		if (RunType!=Production)
		{
			Str255 s;
			DebugStr(ComposeString(s,"\p%p %d %d %p;g",
			xfu.fromSpec.name,
			xfu.first,
			xfu.last,
			xfu.toSpec.name));
		}
#endif
	
	/*
	 * grab the .toc files
	 */
	fromTocH = TOCBySpec(&xfu.fromSpec);
	toTocH = TOCBySpec(&xfu.toSpec);
	if (!fromTocH || !toTocH) return 0;

	if ((*toTocH)->imapTOC)
		err = IMAPTransferDeleteUndo(toTocH, fromTocH, pxfu);
	else
	{
		origCount = (*fromTocH)->count;
		for (count = xfu.ids.offset/sizeof(uLong);!err && count;count--,(*allCount)--)
		{
			if (!(*allCount%10) || TickCount()-*pTicks>30)
			{
				Progress(NoBar,*allCount,nil,nil,nil);
				*pTicks = TickCount();
			}
			if (err=TOCFindMessByMID((*(uLong**)xfu.ids.data)[count-1],toTocH,&sumNum))
			{
				WarnUser(CANT_XF_UNDO,fnfErr);
				return err;
			}
			err = MoveMessageLo(toTocH,sumNum,&xfu.fromSpec,False,false,true);
		}
	}