/*
* StartUndoGroupWithPosition - begin set of undos, save start position
*/
void StartUndoGroupWithPosition( undo_stack *stack, linenum lne,
linenum top, int col )
{
undo *cundo;
if( !EditFlags.Undo || stack == NULL ) {
return;
}
cundo = UndoAlloc( stack, START_UNDO_GROUP );
if( cundo == NULL ) {
stack->OpenUndo++;
return;
}
/*
* check if there is an undo group in progress
*/
if( stack->current >= 0 && stack->OpenUndo > 0 ) {
stack->OpenUndo++;
AddUndoToCurrent( cundo, stack );
cundo->data.sdata.depth = stack->OpenUndo;
return;
}
/*
* no group active, make this the head group
*/
stack->OpenUndo = 1;
if( cundo == NULL ) {
return;
}
cundo->data.sdata.depth = 1;
cundo->data.sdata.p.line = lne;
cundo->data.sdata.top = top;
cundo->data.sdata.time_stamp = ClockTicks;
if( col == 0 ) {
col = 1;
}
cundo->data.sdata.p.column = col;
PushUndoStack( cundo, stack );
/*
* check if we are adding something to the undo stack, and
* if this is NOT during an undo operation. If so, then we
* cannot do an undo-undo, since there have been text changes
*/
if( stack == UndoStack && !EditFlags.UndoInProg ) {
PurgeUndoStack( UndoUndoStack );
}
} /* StartUndoGroupWithPosition */
/*
* FreeAllUndos - release contents of all undo stacks
*/
void FreeAllUndos( void )
{
PurgeUndoStack( UndoStack );
PurgeUndoStack( UndoUndoStack );
} /* FreeAllUndos */
