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feat: add support for displaying Alternate Data Streams #20

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Merged
miclat97 merged 1 commit into from
Jun 29, 2026
+126 −4
Merged

feat: add support for displaying Alternate Data Streams #20

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85 changes: 85 additions & 0 deletions QuickViewFile/Helpers/AdsHelper.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,85 @@
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;

namespace QuickViewFile.Helpers
{
public static class AdsHelper
{
[DllImport("kernel32.dll", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
private static extern IntPtr FindFirstStreamW(string lpFileName, STREAM_INFO_LEVELS InfoLevel, out WIN32_FIND_STREAM_DATA lpFindStreamData, uint dwFlags);

[DllImport("kernel32.dll", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool FindNextStreamW(IntPtr hFindStream, out WIN32_FIND_STREAM_DATA lpFindStreamData);

[DllImport("kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool FindClose(IntPtr hFindFile);

private enum STREAM_INFO_LEVELS
{
FindStreamInfoStandard,
FindStreamInfoMaxInfoLevel
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct WIN32_FIND_STREAM_DATA
{
public long StreamSize;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 296)]
public string cStreamName;
}

public class StreamInfo
{
public string Name { get; set; } = string.Empty;
public long Size { get; set; }
}

public static List<StreamInfo> GetAlternateDataStreams(string filePath)
{
List<StreamInfo> result = new List<StreamInfo>();
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return result;
}

WIN32_FIND_STREAM_DATA findStreamData;
IntPtr hFind = FindFirstStreamW(filePath, STREAM_INFO_LEVELS.FindStreamInfoStandard, out findStreamData, 0);

if (hFind != new IntPtr(-1) && hFind != IntPtr.Zero)
{
try
{
do
{
if (findStreamData.cStreamName != "::$DATA")
{
string streamName = findStreamData.cStreamName;
if (streamName.StartsWith(":"))
{
streamName = streamName.Substring(1);
int dataIndex = streamName.IndexOf(":$DATA", StringComparison.OrdinalIgnoreCase);
if (dataIndex >= 0)
{
streamName = streamName.Substring(0, dataIndex);
}
}
if (!string.IsNullOrEmpty(streamName))
{
result.Add(new StreamInfo { Name = streamName, Size = findStreamData.StreamSize });
}
}
}
while (FindNextStreamW(hFind, out findStreamData));
}
finally
{
FindClose(hFind);
}
}
return result;
}
}
}
2 changes: 2 additions & 0 deletions QuickViewFile/Helpers/ConfigHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ public static void SaveConfig(ConfigModel config)
key.SetValue(nameof(ConfigModel.ShadowEffect), config.ShadowEffect);
key.SetValue(nameof(ConfigModel.ThemeMode), config.ThemeMode);
key.SetValue(nameof(ConfigModel.ShadowQuality), config.ShadowQuality);
key.SetValue(nameof(ConfigModel.ShowAlternateDataStreams), config.ShowAlternateDataStreams);
key.SetValue(nameof(ConfigModel.ShadowDepth), config.ShadowDepth);
key.SetValue(nameof(ConfigModel.ShadowOpacity), config.ShadowOpacity);
key.SetValue(nameof(ConfigModel.ShadowBlur), config.ShadowBlur);
Expand Down Expand Up @@ -96,6 +97,7 @@ public static ConfigModel LoadConfig()
config.ShadowEffect = (int)key.GetValue(nameof(ConfigModel.ShadowEffect), config.ShadowEffect);
config.ShadowQuality = (int)key.GetValue(nameof(ConfigModel.ShadowQuality), config.ShadowQuality);
config.ThemeMode = (int)key.GetValue(nameof(ConfigModel.ThemeMode), config.ThemeMode);
config.ShowAlternateDataStreams = (int)key.GetValue(nameof(ConfigModel.ShowAlternateDataStreams), config.ShowAlternateDataStreams);
config.Utf8InsteadOfASCIITextPreview = (int)key.GetValue(nameof(ConfigModel.Utf8InsteadOfASCIITextPreview), config.Utf8InsteadOfASCIITextPreview);
config.ShadowDepth = double.Parse((string)key.GetValue(nameof(ConfigModel.ShadowDepth).ToString(), config.ShadowDepth));
config.ShadowOpacity = double.Parse((string)key.GetValue(nameof(ConfigModel.ShadowOpacity).ToString(), config.ShadowOpacity));
Expand Down
1 change: 1 addition & 0 deletions QuickViewFile/Models/ConfigModel.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@ public string BitmapScalingMode
public int RenderMode { get; set; } = 0; // 0 - Default, 1 - SoftwareOnly
public int EdgeMode { get; set; } = 0; // 0 - Unspecified, 1 - Aliased
public int ThemeMode { get; set; } = 0; // 0 - System, 1 - Light, 2 - Dark
public int ShowAlternateDataStreams { get; set; } = 1; // 0 - Disabled, 1 - Enabled
public double ShadowDepth { get; set; } = 0;
public double ShadowOpacity { get; set; } = 0;
public double ShadowBlur { get; set; } = 0;
Expand Down
5 changes: 3 additions & 2 deletions QuickViewFile/SettingsWindow.xaml.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -63,11 +63,11 @@ private void GenerateUI()
panel.Children.Add(comboBox);
}
else if (prop.Name == "ShadowEffect" || prop.Name == "ShadowQuality" || prop.Name == "RenderMode" ||
prop.Name == "EdgeMode" || prop.Name == "Utf8InsteadOfASCIITextPreview")
prop.Name == "EdgeMode" || prop.Name == "Utf8InsteadOfASCIITextPreview" || prop.Name == "ShowAlternateDataStreams")
{
var comboBox = new ComboBox { Width = 400, VerticalAlignment = VerticalAlignment.Center };

if (prop.Name == "Utf8InsteadOfASCIITextPreview" || prop.Name == "ShadowEffect")
if (prop.Name == "Utf8InsteadOfASCIITextPreview" || prop.Name == "ShadowEffect" || prop.Name == "ShowAlternateDataStreams")
{
comboBox.Items.Add(new ComboBoxItem { Content = "Disabled", Tag = 0 });
comboBox.Items.Add(new ComboBoxItem { Content = "Enabled", Tag = 1 });
Expand Down Expand Up @@ -144,6 +144,7 @@ private void SaveButton_Click(object sender, RoutedEventArgs e)
ConfigHelper.loadedConfig.RenderMode = _config.RenderMode;
ConfigHelper.loadedConfig.EdgeMode = _config.EdgeMode;
ConfigHelper.loadedConfig.ThemeMode = _config.ThemeMode;
ConfigHelper.loadedConfig.ShowAlternateDataStreams = _config.ShowAlternateDataStreams;
ConfigHelper.loadedConfig.ShadowDepth = _config.ShadowDepth;
ConfigHelper.loadedConfig.ShadowOpacity = _config.ShadowOpacity;
ConfigHelper.loadedConfig.ShadowBlur = _config.ShadowBlur;
Expand Down
37 changes: 35 additions & 2 deletions QuickViewFile/ViewModel/FilesListViewModel.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,25 @@ public void RefreshFiles(string? fileToSelect = null)
LastModifiedString = file.LastWriteTime.ToString("yyyy-MM-dd HH:mm"),
FileContentModel = new FileContentModel()
});

if (Config.ShowAlternateDataStreams == 1)
{
var streams = AdsHelper.GetAlternateDataStreams(file.FullName);
foreach (var stream in streams)
{
ActiveListItems.Add(new ItemList
{
Name = $"{file.Name}:{stream.Name}",
Size = Math.Round((stream.Size / 1024.0), MidpointRounding.ToPositiveInfinity).ToString(),
SizeBytes = stream.Size,
FullPath = $"{file.FullName}:{stream.Name}",
IsDirectory = false,
LastModified = file.LastWriteTime,
LastModifiedString = file.LastWriteTime.ToString("yyyy-MM-dd HH:mm"),
FileContentModel = new FileContentModel()
});
}
}
}

try
Expand Down Expand Up @@ -243,14 +262,28 @@ public async Task LazyLoadFile(bool? forceLoad = false)
return;

string filePath = SelectedItem.FullPath;
string ext = Path.GetExtension(filePath).ToLowerInvariant();
string extensionPath = filePath;

string fileName = Path.GetFileName(filePath);
bool isAds = false;
if (fileName != null && fileName.Contains(':'))
{
int colonIndex = extensionPath.LastIndexOf(':');
if (colonIndex > 3) // More than drive letter like C:\
{
extensionPath = extensionPath.Substring(0, colonIndex);
isAds = true;
}
}

string ext = Path.GetExtension(extensionPath).ToLowerInvariant();

FileTypeEnum fileType = FileTypeEnum.Text;
var imageExtensions = ConfigHelper.GetStringsFromCommaSeparatedString(Config.ImageExtensions);
var musicExtensions = ConfigHelper.GetStringsFromCommaSeparatedString(Config.MusicExtensions);
var videoExtension = ConfigHelper.GetStringsFromCommaSeparatedString(Config.VideoExtensions);
var liveStreamExtensions = ConfigHelper.GetStringsFromCommaSeparatedString(Config.LiveStreamExtensions);
if (ext != null)
if (ext != null && !isAds) // Default to Text for ADS because many video/image formats cannot be streamed directly from ADS
{
if (liveStreamExtensions.Contains(ext))
{
Expand Down