///<summary>
/// Called when an asynchronous in-place save operation finishes
///</summary>
void SaveInPlaceAsyncCallback(IAsyncResult ar)
{
lock (LockObj) {
SaveInPlaceOperation sipo = (SaveInPlaceOperation)ar.AsyncState;
if (sipo.Result == ThreadedAsyncOperation.OperationResult.Finished) // save went ok
{
LoadWithFile(sipo.SavePath);
if (undoDeque.Count > 0)
{
SaveCheckpoint = undoDeque.PeekFront();
}
else
{
SaveCheckpoint = null;
}
changedBeyondUndo = false;
}
else if (sipo.Result == ThreadedAsyncOperation.OperationResult.Cancelled) // save cancelled
{
}
else if (sipo.Result == ThreadedAsyncOperation.OperationResult.CaughtException)
{
}
// re-allow buffer usage
this.ReadAllowed = true;
this.ModifyAllowed = true;
this.FileOperationsAllowed = true;
this.EmitEvents = true;
fsw.EnableRaisingEvents = true;
// notify the world about the changes
EmitPermissionsChanged();
EmitChanged();
// if user provided a callback, call it now
if (userSaveAsyncCallback != null)
{
userSaveAsyncCallback(ar);
}
// notify that Save has finished
saveFinishedEvent.Set();
}
}
///<summary>
/// Save the buffer under the same filename, using an asynchronous model
///</summary>
public IAsyncResult BeginSave(ProgressCallback progressCallback, AsyncCallback ac)
{
lock (LockObj) {
if (!fileOperationsAllowed)
{
return(null);
}
saveFinishedEvent.Reset();
userSaveAsyncCallback = ac;
Thread saveThread = null;
ThreadedAsyncResult tar = null;
// decide whether to save in place or normally
if (!fileBuf.IsResizable || this.Size == fileBuf.Size)
{
SaveInPlaceOperation sipo = new SaveInPlaceOperation(this, progressCallback, SaveInPlaceAsyncCallback, useGLibIdle);
saveThread = new Thread(sipo.OperationThread);
tar = new ThreadedAsyncResult(sipo, saveFinishedEvent, false);
}
else
{
SaveOperation so = new SaveOperation(this, TempFile.CreateName(tempDir), progressCallback, SaveAsyncCallback, useGLibIdle);
saveThread = new Thread(so.OperationThread);
tar = new ThreadedAsyncResult(so, saveFinishedEvent, false);
}
// don't allow messing up with the buffer
// while we are saving
// ...ReadAllowed is set in SaveOperation
//this.ReadAllowed=false;
this.ModifyAllowed = false;
this.FileOperationsAllowed = false;
this.EmitEvents = false;
fsw.EnableRaisingEvents = false;
// start save thread
saveThread.IsBackground = true;
saveThread.Start();
return(tar);
}
}
