/// <summary>
/// Rolls back the last operation in this session. The operation will be removed from
/// the session's operation list.
/// </summary>
/// <returns>True if an edit was undone.</returns>
internal bool Rollback()
{
// Return if there is nothing to rollback.
if (m_Operations.Count == 0)
{
return(false);
}
// Get the tail operation
int index = m_Operations.Count - 1;
Operation op = m_Operations[index];
// Move the data file to the project undo folder
uint fileNum = op.FileNumber;
if (fileNum == 0)
{
throw new ApplicationException("Edit does not appear to belong to the current editing session");
}
string name = ProjectDatabase.GetDataFileName(fileNum);
string sourceFileName = Path.Combine(m_Project.ProjectFolder, name);
string destFileName = Path.Combine(m_Project.GetUndoFolder(), name);
File.Move(sourceFileName, destFileName);
// Remember the sequence number of the edit we're rolling back
uint editSequence = op.EditSequence;
// Remove the edit and undo it
m_Operations.RemoveAt(index);
this.MapModel.RemoveEdit(op);
m_Project.SetLastItem(op.EditSequence - 1);
op.Undo();
return(true);
}
/// <summary>
/// Opens an editing project that was previously created.
/// </summary>
/// <param name="projectName">The user-perceived name of the project</param>
/// <returns>Information describing the state of the project (null if it could not be found).</returns>
internal Project OpenProject(string projectName)
{
if (String.IsNullOrWhiteSpace(projectName))
{
throw new ArgumentNullException();
}
// Obtain the project ID
string projectGuid = FindProjectId(projectName);
if (projectGuid == null)
{
throw new ApplicationException();
}
// Load the project creation event
Guid projectId = Guid.Parse(projectGuid);
string dataFolder = CreateDataFolder(projectId);
string creationFileName = Path.Combine(dataFolder, NewProjectEvent.FileName);
// Read current project settings
dataFolder = CreateDataFolder(projectId);
string settingsFileName = Path.Combine(dataFolder, "settings.txt");
ProjectSettings ps = ProjectSettings.CreateInstance(settingsFileName);
Settings.Default.LastProjectName = projectName;
Settings.Default.Save();
// Now load the data
Project result = new Project(this, projectId, ps);
// Get rid of any undo folder that may be left over from a crashed editing session
result.DeleteUndoFolder();
// Bit jumbled up here (historical reasons), should tidy up...
EditingController.Current.SetProject(result);
result.LoadEdits(dataFolder);
//EditingController.Current.SetProject(result);
EditingController.Current.SetMapModel(result.Model, null);
result.Model.Load();
// Get rid of any empty sessions
//result.Model.RemoveEmptySessions();
// Debug CedExporter
string ptsFileName = Path.Combine(dataFolder, projectName + ".pts");
CheckPts(ptsFileName, result.Model);
// Need to set it again (need to find out why)... if you don't you get a null
// ref on opening last project at startup
EditingController.Current.SetMapModel(result.Model, null);
// Create a new editing session
uint sessionId = result.AllocateId();
NewSessionEvent s = new NewSessionEvent(sessionId)
{
UserName = System.Environment.UserName,
MachineName = System.Environment.MachineName,
};
string sessionFile = Path.Combine(dataFolder, GetDataFileName(sessionId));
string sessionText = EditSerializer.GetSerializedString <Change>(DataField.Edit, s);
File.WriteAllText(sessionFile, sessionText);
Session session = new Session(result, s, sessionFile);
result.Model.AddSession(session);
result.Model.SetWorkingSession(session);
result.SetLastItem(session.Id);
return(result);
}