/// <summary>
/// Opens a new document for the given client</summary>
/// <param name="client">Document client</param>
/// <returns>Document, opened by the given client, or null if the user cancelled or
/// there was a problem</returns>
/// <remarks>Exceptions during opening are caught and reported via OnOpenException.</remarks>
public virtual IDocument OpenNewDocument(IDocumentClient client)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
IDocument result = null;
Uri uri = GetNewDocumentUri(client);
if (uri != null)
{
result = SafeOpen(client, uri);
// Consider the document untitled unless its file has been created by the client or
// unless the user has already chosen a filename.
if (result != null)
{
if (!m_newDocumentPaths.Contains(result.Uri.LocalPath) &&
!FileDialogService.PathExists(result.Uri.LocalPath))
{
m_untitledDocuments.Add(result);
}
}
}
return(result);
}
/// <summary>
/// Creates a Uri under a specified directory, with a file name containing the specified string and extension,
/// which currently doesn't exist on the file system</summary>
/// <param name="directoryName">The base directory path under which the new Uri should reside</param>
/// <param name="fileName">The base file name to be included in the new Uri, e.g., "Untitled".</param>
/// <param name="extension">The file extension to be appended to the new Uri</param>
/// <returns>A Uri under 'directoryName', with a file name containing 'fileName'</returns>
/// <remarks>The default is to append "(#)" to 'fileName' if necessary, where '#' is a numeric suffix
/// starting with 2 that is always incremented (independently for each file extension) for the
/// life of this app.</remarks>
protected virtual Uri GenerateUniqueUri(string directoryName, string fileName, string extension)
{
Uri uri;
int suffix;
m_extensionSuffixes.TryGetValue(extension, out suffix);
// check the name to make sure there is no existing file with the same name
while (true)
{
string fullFileName = fileName;
if (suffix > 0)
{
fullFileName += "(" + (suffix + 1) + ")";
}
suffix++;
fullFileName += extension;
string fullPath = Path.Combine(directoryName, fullFileName);
if (!FileDialogService.PathExists(fullPath))
{
uri = new Uri(fullPath, UriKind.RelativeOrAbsolute);
break;
}
}
m_extensionSuffixes[extension] = suffix;
return(uri);
}
/// <summary>
/// Gets the path name for a new document</summary>
/// <param name="client">Document client</param>
/// <returns>URI representing the new path, or null if the user cancelled</returns>
protected virtual Uri GetNewDocumentUri(IDocumentClient client)
{
Uri uri = null;
string fileName = client.Info.NewDocumentName;
string extension = null;
string directoryName = null;
if (client.Info.Extensions.Length > 1)
{
if (string.IsNullOrEmpty(client.Info.DefaultExtension))
{
// Since there are multiple possible extensions, ask the user to pick a filename.
string path = PromptUserForNewFilePath(client, fileName, null);
if (path != null)
{
try
{
if (File.Exists(path))
{
File.Delete(path);
}
}
catch (Exception e)
{
string message = string.Format(
"Failed to delete: {0}. Exception: {1}", path, e);
Outputs.WriteLine(OutputMessageType.Warning, message);
}
m_newDocumentPaths.Add(path);
uri = new Uri(path, UriKind.RelativeOrAbsolute);
return(uri);
}
}
else
{
directoryName = client.Info.InitialDirectory;
if (directoryName == null)
{
directoryName = FileDialogService.InitialDirectory;
}
extension = client.Info.DefaultExtension;
}
}
if (client.Info.Extensions.Length >= 1)
{
// Since there is only one possible extension, we can choose the new name (e.g., "Untitled.xml").
directoryName = client.Info.InitialDirectory;
if (directoryName == null)
{
directoryName = FileDialogService.InitialDirectory;
}
extension = client.Info.Extensions[0];
if (directoryName != null && extension != null)
{
int suffix;
m_extensionSuffixes.TryGetValue(extension, out suffix);
// check the name to make sure there is no existing file with the same name
while (true)
{
string fullFileName = fileName;
if (suffix > 0)
{
fullFileName += "(" + (suffix + 1) + ")";
}
suffix++;
fullFileName += extension;
string fullPath = Path.Combine(directoryName, fullFileName);
if (!FileDialogService.PathExists(fullPath))
{
uri = new Uri(fullPath, UriKind.RelativeOrAbsolute);
break;
}
}
m_extensionSuffixes[extension] = suffix;
}
}
return(uri);
}