/*
* CurrentLineReplaceUndoEnd - actually add the undo
*/
void CurrentLineReplaceUndoEnd( int endgrp )
{
fcb *cfcb, *nfcb;
undo *top, *delrec;
fcb_list fcblist;
if( !EditFlags.Undo || UndoStack == NULL ) {
return;
}
/*
* see if we can merge this with the last undo record
* (provided we are in an open undo group)
*
* we need the following undo sequence:
* END_UNDO_GROUP
* UNDO_INSERT_LINES
* - must have end line one less than the current line
* UNDO_DELETE_FCBS
* - must have last line to insert being two less
* than the current (since then the undo for
* the current would be on the line ONE less than
* the current);
*/
if( endgrp && UndoStack->OpenUndo > 0 ) {
top = UndoStack->stack[UndoStack->current];
if( top != NULL && top->type == END_UNDO_GROUP ) {
top = top->next;
if( top != NULL && top->type == UNDO_INSERT_LINES ) {
if( top->data.del_range.end == CurrentPos.line - 1 ) {
delrec = top;
top = top->next;
if( top != NULL && top->type == UNDO_DELETE_FCBS ) {
cfcb = top->data.fcbs.tail;
if( cfcb->end_line == CurrentPos.line - 2 ) {
/*
* FINALLY, we can add it. either
* add to current fcb or add a new
* fcb
*/
if( (FcbSize( cfcb ) + lineSave->len + 4) <=
MAX_IO_BUFFER ) {
FetchFcb( cfcb );
InsertLLItemAfter( (ss **)&cfcb->lines.tail,
(ss *)cfcb->lines.tail, (ss *)lineSave );
cfcb->byte_cnt += lineSave->len + 1;
cfcb->end_line++;
} else {
nfcb = singleLineFcb();
nfcb->start_line = nfcb->end_line = cfcb->end_line + 1;
InsertLLItemAfter( (ss **)&(top->data.fcbs.tail),
(ss *)cfcb, (ss *)nfcb );
nfcb->non_swappable = FALSE;
}
delrec->data.del_range.end++;
Modified( TRUE );
return;
}
}
}
}
}
}
/*
* create an fcb with a single line
*/
cfcb = singleLineFcb();
/*
* build undo action
*/
fcblist.head = cfcb;
fcblist.tail = cfcb;
StartUndoGroupWithPosition( UndoStack, cLine, pageTop, cCol );
UndoDeleteFcbs( CurrentPos.line - 1, &fcblist, UndoStack );
UndoInsert( CurrentPos.line, CurrentPos.line, UndoStack );
if( endgrp ) {
EndUndoGroup( UndoStack );
}
Modified( TRUE );
cfcb->non_swappable = FALSE;
} /* CurrentLineReplaceUndoEnd */
/*
* StartUndoGroup - begin set of undos
*/
void StartUndoGroup( undo_stack *us )
{
StartUndoGroupWithPosition( us, CurrentPos.line, LeftTopPos.line, CurrentPos.column );
} /* StartUndoGroup */