private void ShowFile(PackageFile file)
{
long size = -1;
object content = null;
bool isBinary = false;
// find all plugins which can handle this file's extension
IEnumerable<IPackageContentViewer> contentViewers = FindContentViewer(file);
if (contentViewers != null)
{
isBinary = true;
try
{
// iterate over all plugins, looking for the first one that return non-null content
foreach (IPackageContentViewer viewer in contentViewers)
{
using (Stream stream = file.GetStream())
{
if (size == -1)
{
size = stream.Length;
}
content = viewer.GetView(Path.GetExtension(file.Name), stream);
if (content != null)
{
// found a plugin that can read this file, stop
break;
}
}
}
}
catch (Exception ex)
{
// don't let plugin crash the app
content = Resources.PluginFailToReadContent + Environment.NewLine + ex.ToString();
}
if (content is string)
{
isBinary = false;
}
}
// if plugins fail to read this file, fall back to the default viewer
if (content == null)
{
isBinary = FileHelper.IsBinaryFile(file.Name);
if (isBinary)
{
// don't calculate the size again if we already have it
if (size == -1)
{
using (Stream stream = file.GetStream())
{
size = stream.Length;
}
}
content = Resources.UnsupportedFormatMessage;
}
else
{
content = ReadFileContent(file, out size);
}
}
var fileInfo = new FileContentInfo(
file,
file.Path,
content,
!isBinary,
size);
ViewModel.ShowFile(fileInfo);
}
public void ShowFile(FileContentInfo fileInfo)
{
ShowContentViewer = true;
CurrentFileInfo = fileInfo;
}