/*
* EndUndoGroup - end set of undos
*/
void EndUndoGroup( undo_stack *stack )
{
undo *cundo;
int done;
if( stack == NULL || !EditFlags.Undo ) {
return;
}
if( stack->current < 0 ) {
if( EditFlags.UndoLost ) {
stack->OpenUndo--;
if( stack->OpenUndo == 0 ) {
EditFlags.UndoLost = FALSE;
}
}
return;
}
cundo = UndoAlloc( stack, END_UNDO_GROUP );
/*
* decrement the open count and add element
*/
stack->OpenUndo--;
if( cundo == NULL ) {
if( stack->OpenUndo == 0 ) {
EditFlags.UndoLost = FALSE;
}
return;
}
AddUndoToCurrent( cundo, stack );
/*
* if we have just closed a group, make sure there is something
* to do; if not, take this item off. this gets rid of all those
* annoying undo events created for something that didn't modify
* the file
*/
if( stack->OpenUndo == 0 ) {
done = FALSE;
for( ; cundo != NULL; cundo = cundo->next ) {
if( cundo->type != START_UNDO_GROUP && cundo->type != END_UNDO_GROUP ) {
done = TRUE;
break;
}
}
if( !done ) {
cundo = PopUndoStack( stack );
UndoFree( cundo, FALSE );
}
}
} /* EndUndoGroup */
/*
* dropUndoStackTop - clear top of undo stack
*/
static void dropUndoStackTop( undo_stack *stack )
{
int i;
if( stack->current < 0 ) {
return;
}
UndoFree( stack->stack[0], true );
for( i = 1; i <= stack->current; i++ ) {
stack->stack[i - 1] = stack->stack[i];
}
stack->rolled = true;
} /* dropUndoStackTop */
/*
* PurgeUndoStack - do just that
*/
void PurgeUndoStack( undo_stack *stack )
{
int i;
if( stack == NULL ) {
return;
}
for( i = stack->current; i >= 0; i-- ) {
UndoFree( stack->stack[i], true );
}
MemFreePtr( (void **)&(stack->stack) );
stack->current = -1;
} /* PurgeUndoStack */
