/// <summary>
/// Rewrites the machine file according to the current in-memory representation of the timeline.
/// </summary>
/// <param name="diffsEnabled">Enable calculation of diffs. Setting this to true can cause compacting to take a long time.</param>
/// <remarks>
/// This is useful for compacting the size of the machine file, due to the fact that bookmark and timeline deletions don't actually
/// remove anything from the machine file, but simply log the fact they happened.
/// </remarks>
///
public void Compact(IFileSystem fileSystem)
{
// Only allow closed machines to compact!
if (!CanCompact())
{
throw new Exception("Can't compact an open machine!");
}
string oldFilepath = PersistantFilepath;
string newFilepath = oldFilepath + ".tmp";
MachineFileInfo info = null;
using (ITextFile textFile = fileSystem.OpenTextFile(oldFilepath))
{
info = MachineFile.Read(textFile);
}
using (ITextFile textFile = fileSystem.OpenTextFile(newFilepath))
using (MachineFile writer = new MachineFile(textFile, info.History))
{
writer.WriteHistory(info.Name);
}
fileSystem.ReplaceFile(oldFilepath, newFilepath);
}
static public MachineFileInfo Read(ITextFile textFile)
{
MachineFileReader reader = new MachineFileReader();
reader.ReadFile(textFile);
MachineFileInfo info = new MachineFileInfo(reader.Name, reader.History, reader.NextLineId);
return(info);
}
static public LocalMachine GetClosedMachine(IFileSystem fileSystem, string filepath)
{
MachineFileInfo info = null;
using (ITextFile textFile = fileSystem.OpenTextFile(filepath))
{
info = MachineFile.Read(textFile);
}
LocalMachine machine = New(info.Name, info.History, filepath);
if (machine.History != null)
{
HistoryEvent historyEvent = machine.History.CurrentEvent.MostRecent <BookmarkHistoryEvent>();;
machine.Display.GetFromBookmark((historyEvent as BookmarkHistoryEvent)?.Bookmark);
machine.Display.EnableGreyscale(true);
}
return(machine);
}
public void OpenFromFile(IFileSystem fileSystem)
{
if (IsOpen)
{
return;
}
ITextFile textFile = null;
try
{
textFile = fileSystem.OpenTextFile(PersistantFilepath);
MachineFileInfo info = MachineFile.Read(textFile);
MachineFile file = new MachineFile(textFile, info.History, info.NextLineId);
_history = info.History;
_name = info.Name;
File = file;
BookmarkHistoryEvent historyEvent = _history.CurrentEvent.MostRecent <BookmarkHistoryEvent>();
SetCurrentEvent(historyEvent ?? _history.RootEvent);
// Should probably be monitoring the IsOpen property, I think...
Display.EnableGreyscale(false);
}
catch (Exception ex)
{
// Make sure we remove our lock on the machine file...
textFile?.Dispose();
textFile = null;
File = null;
throw ex;
}
}
