/// <summary>
/// Shows the "Save Changes" dialog for a document that is about to be closed and saves the
/// document if required.
/// </summary>
/// <param name="document">The document.</param>
/// <returns>
/// <see langword="true"/> if all changes are saved or can be discarded; otherwise
/// <see langword="false"/> if there are still changes that need to be saved.
/// </returns>
/// <remarks>
/// This method checks if the document is modified and can be saved. If this is the case a
/// dialog is displayed that tells the user that the document is about to close and asks if
/// any changes should be saved or discarded, or if any close operation should be canceled.
/// If necessary, <see cref="Save"/> is called automatically.
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="document"/> is <see langword="null"/>.
/// </exception>
public bool PromptSaveChanges(Document document)
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
if (!document.IsModified || !document.DocumentType.IsSavable)
{
return(true);
}
// Ask the user.
var saveChangesDialog = new SaveChangesViewModel
{
ModifiedDocuments = new[] { document },
DisplayName = Editor.ApplicationName,
};
_windowService.ShowDialog(saveChangesDialog);
if (saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.SaveAndClose)
{
Logger.Info(CultureInfo.InvariantCulture, "Saving document \"{0}\".", document.GetName());
return(Save(document));
}
if (saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.CloseWithoutSaving)
{
Logger.Info(CultureInfo.InvariantCulture, "Discarding changes of document \"{0}\".", document.GetName());
return(true);
}
Debug.Assert(saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.Cancel);
Logger.Info(CultureInfo.InvariantCulture, "Closing of document canceled by user.");
return(false);
}
private async Task <bool> CloseAllDocumentsButAsync(Document excludedDocument)
{
if (excludedDocument == null)
{
Logger.Info("Closing all documents.");
}
else
{
Logger.Info(CultureInfo.InvariantCulture, "Closing all documents except: \"{0}\".", excludedDocument.GetName());
}
// Collect all documents that need to be saved.
var modifiedDocuments = _documents.Where(document => document != excludedDocument &&
document.IsModified &&
document.DocumentType.IsSavable)
.ToArray();
// Do we need to save the documents before closing them?
if (modifiedDocuments.Length > 0)
{
var saveChangesDialog = new SaveChangesViewModel
{
ModifiedDocuments = modifiedDocuments,
DisplayName = Editor.ApplicationName,
};
_windowService.ShowDialog(saveChangesDialog);
if (saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.SaveAndClose)
{
foreach (var document in modifiedDocuments)
{
bool success = Save(document);
if (!success)
{
// The save operation failed or was canceled. --> Abort!
Logger.Info("Save operation failed or was canceled by user. Canceling close operation");
return(false);
}
}
}
else if (saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.CloseWithoutSaving)
{
Logger.Info("Discarding changes of remaining document.");
}
else
{
Debug.Assert(saveChangesDialog.SaveChangesDialogResult == SaveChangesDialogResult.Cancel);
Logger.Info("Close operation canceled by user.");
return(false);
}
}
// Close all documents
foreach (var document in _documents.ToArray())
{
if (document != excludedDocument)
{
Close(document, true);
// Redraw GUI and keep app responsive.
await Dispatcher.Yield();
}
}
return(true);
}