/*
=============
Undo_Clear
Clears the undo buffer.
=============
*/
void Undo_Clear(void)
{
undo_t *undo, *nextundo;
brush_t *pBrush, *pNextBrush;
entity_t *pEntity, *pNextEntity;
Undo_ClearRedo();
for (undo = g_undolist; undo; undo = nextundo)
{
nextundo = undo->next;
for (pBrush = undo->brushlist.next ; pBrush != NULL && pBrush != &undo->brushlist ; pBrush = pNextBrush)
{
pNextBrush = pBrush->next;
g_undoMemorySize -= Brush_MemorySize(pBrush);
Brush_Free(pBrush);
}
for (pEntity = undo->entitylist.next; pEntity != NULL && pEntity != &undo->entitylist; pEntity = pNextEntity)
{
pNextEntity = pEntity->next;
g_undoMemorySize -= Entity_MemorySize(pEntity);
Entity_Free(pEntity);
}
g_undoMemorySize -= sizeof(undo_t);
Mem_Free(undo);
}
g_undolist = NULL;
g_lastundo = NULL;
g_undoSize = 0;
g_undoMemorySize = 0;
g_undoId = 1;
}
/*
=============
Undo_Start
=============
*/
void Undo_Start( const char *operation ){
// spog - disable undo if undo levels = 0
if ( g_PrefsDlg.m_nUndoLevels == 0 ) {
#ifdef DBG_UNDO
Sys_Printf( "Undo_Start: undo is disabled.\n" );
#endif
return;
}
Undo_ClearRedo();
Undo_GeneralStart( operation );
}
/*
=============
Undo_Start
=============
*/
void Undo_Start(char *operation)
{
Undo_ClearRedo();
Undo_GeneralStart(operation);
}