/// <summary>
/// Refresh preview (if needed). Dependends on current environment and changed ETag.
/// The preview is valid for remote and local view.
/// First call will always lead to preview.
///
/// /Files/LocalPreview/Server/Path-To-File/file.preview.ext
/// /Files/LocalPreview/Server/Path-To-File/file.etag
/// </summary>
/// <param name="file"></param>
public void RefreshPreview(File file)
{
_file = file;
bool createEtag = false;
string path = "Files/LocalPreview/" + _info.Hostname + "/" + _file.FilePath + ".etag";
var isf = App.DataContext.Storage;
{
if (isf.FileExists(path))
{
var reader = new System.IO.StreamReader(isf.OpenFile(path, System.IO.FileMode.Open));
if (reader.ReadToEnd() == _file.ETag)
{
reader.Close();
return;
}
reader.Close();
}
else
{
createEtag = true;
}
}
// create main type
if (_enabled)
{
switch (_file.FileType.Split('/').First())
{
case "text":
TextPreview();
break;
case "image":
ImagePreview();
break;
case "application":
// try PDF content fetch
TextContentPreview();
break;
default:
PreviewIcon(file.IsDirectory);
break;
}
}
else
{
PreviewIcon();
createEtag = false;
}
if (createEtag)
{
var storagePath = System.IO.Path.GetDirectoryName(path);
if (!isf.DirectoryExists(storagePath)) isf.CreateDirectory(storagePath);
var stream = isf.CreateFile(path);
System.IO.StreamWriter writer = new System.IO.StreamWriter(stream);
writer.Write(_file.ETag);
writer.Close();
}
}
/// <summary>
/// Try to display contents of the file.
/// The action can fail depending on the file type and size, then the default icon view will be generated.
/// Must be created an refreshed linear (no async!) as it would raise I/O-Exceptions.
///
/// </summary>
/// <param name="info">Associated Account info</param>
/// <param name="file">Desired file</param>
/// <param name="preview">If the current environment does not allow previews (remote view, no WLAN,) set this to false</param>
public FileMultiTileViewControl(Account info, File file, bool preview)
{
InitializeComponent();
_enabled = preview;
_info = info;
_file = file;
this.FileName.Text = file.FileName;
RefreshPreview(file);
}
private async Task OpenItem(File item) {
if (item.IsDirectory) {
await FetchStructure(item.FilePath);
} else {
//todo: win8 file+uri associations callers
//todo: open file
}
}
private async Task QueryStructure() {
var dav = new WebDAVClient(_workingAccount.GetUri(), await App.AccountService.GetCredentials(_workingAccount));
try {
var entries = await dav.GetEntries(_workingPath, true);
if (entries.Count == 0) throw new Exception("No entries found");
bool _firstItem = false;
// display all items linear
// we cannot wait till an item is displayed, instead for a fluid
// behaviour we should calculate fadeIn-delays.
int delayStart = 0;
int delayStep = 50; // ms
foreach (var item in entries) {
File fileItem = new File() {
FileName = item.FileName,
FilePath = item.FilePath.ToString(),
FileSize = item.Size,
FileType = item.MimeType,
FileCreated = item.Created,
FileLastModified = item.LastModified,
IsDirectory = item.IsDirectory
};
bool display = true;
switch (_views[_viewIndex]) {
case "detail":
if (!_firstItem) {
_firstItem = true;
// Root
if (fileItem.IsDirectory) {
if (item.FilePath.ToString() == _workingAccount.WebDAVPath) {
// cannot go up further
display = false;
} else {
fileItem.IsRootItem = true;
fileItem.FilePath = fileItem.FileParentPath;
}
}
}
if (display) {
FileDetailViewControl detailControl = new FileDetailViewControl() {
DataContext = fileItem,
Opacity = 0,
Background = new SolidColorBrush() { Color = Colors.Transparent },
};
DetailList.Items.Add(detailControl);
detailControl.Delay(delayStart, () => {
detailControl.FadeIn(100);
});
delayStart += delayStep;
}
break;
case "tile":
if (!_firstItem) {
_firstItem = true;
// Root
if (fileItem.IsDirectory) {
if (item.FilePath.ToString() == _workingAccount.WebDAVPath) {
// cannot go up further
display = false;
} else {
fileItem.IsRootItem = true;
fileItem.FilePath = fileItem.FileParentPath;
}
}
}
if (display) {
FileMultiTileViewControl multiControl = new FileMultiTileViewControl(_workingAccount, fileItem, true) {
Width = 200,
Height = 200,
Opacity = 0,
Margin = new Thickness(0, 0, 10, 10),
};
multiControl.Tap += new EventHandler<System.Windows.Input.GestureEventArgs>(TileListSelectionChanged);
// sometimes the exception "wrong parameter" is thrown - but why???
TileView.Children.Add(multiControl);
multiControl.Delay(delayStart, () => {
multiControl.FadeIn(100);
});
}
break;
}
}
progress.IsVisible = false;
} catch (Exception ex) {
progress.IsVisible = false;
var webException = ex as WebException;
var webResponse = webException != null ? webException.Response as HttpWebResponse : null;
if (webException != null &&
webException.Status == WebExceptionStatus.ProtocolError &&
webResponse != null &&
webResponse.StatusCode == HttpStatusCode.Unauthorized) {
MessageBox.Show("FetchFile_Unauthorized".Translate(), "Error_Caption".Translate(), MessageBoxButton.OK);
} else {
MessageBox.Show("FetchFile_Unexpected_Result".Translate(), "Error_Caption".Translate(), MessageBoxButton.OK);
}
}
}
private void FetchStructureComplete(DAVRequestResult result, object userObj)
{
if (result.Status == ServerStatus.MultiStatus && !result.Request.ErrorOccured && result.Items.Count > 0)
{
bool _firstItem = false;
// display all items linear
// we cannot wait till an item is displayed, instead for a fluid
// behaviour we should calculate fadeIn-delays.
int delayStart = 0;
int delayStep = 50; // ms
foreach (DAVRequestResult.Item item in result.Items)
{
File fileItem = new File()
{
FileName = item.LocalReference,
FilePath = item.Reference,
FileSize = item.ContentLength,
FileType = item.ContentType,
FileCreated = item.CreationDate,
FileLastModified = item.LastModified,
IsDirectory = item.ResourceType == ResourceType.Collection
};
bool display = true;
Dispatcher.BeginInvoke(() =>
{
switch (_views[_viewIndex])
{
case "detail":
if (!_firstItem)
{
_firstItem = true;
// Root
if (fileItem.IsDirectory)
{
if (item.Reference == _workingAccount.WebDAVPath)
{
// cannot go up further
display = false;
}
else
{
fileItem.IsRootItem = true;
fileItem.FilePath = fileItem.FileParentPath;
}
}
}
if (display)
{
FileDetailViewControl detailControl = new FileDetailViewControl()
{
DataContext = fileItem,
Opacity = 0,
Background = new SolidColorBrush() { Color = Colors.Transparent },
};
DetailList.Items.Add(detailControl);
detailControl.Delay(delayStart, () =>
{
detailControl.FadeIn(100);
});
delayStart += delayStep;
}
break;
case "tile":
if (!_firstItem)
{
_firstItem = true;
// Root
if (fileItem.IsDirectory)
{
if (item.Reference == _workingAccount.WebDAVPath)
{
// cannot go up further
display = false;
}
else
{
fileItem.IsRootItem = true;
fileItem.FilePath = fileItem.FileParentPath;
}
}
}
if (display)
{
FileMultiTileViewControl multiControl = new FileMultiTileViewControl(_workingAccount, fileItem, true)
{
Width = 200,
Height = 200,
Opacity = 0,
Margin = new Thickness(0, 0, 10, 10),
};
multiControl.Tap += new EventHandler<System.Windows.Input.GestureEventArgs>(TileListSelectionChanged);
// sometimes the exception "wrong parameter" is thrown - but why???
TileView.Children.Add(multiControl);
multiControl.Delay(delayStart, () =>
{
multiControl.FadeIn(100);
});
}
break;
}
});
}
Dispatcher.BeginInvoke(() =>
{
progress.IsVisible = false;
});
}
else
{
Dispatcher.BeginInvoke(() =>
{
progress.IsVisible = false;
if (result.Status == ServerStatus.Unauthorized)
{
MessageBox.Show("FetchFile_Unauthorized".Translate(), "Error_Caption".Translate(), MessageBoxButton.OK);
}
else
{
MessageBox.Show("FetchFile_Unexpected_Result".Translate(), "Error_Caption".Translate(), MessageBoxButton.OK);
}
});
}
}
