/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Stream reference to access source file.</param>
public override void DoPreview <T>(T dataSource)
{
CleanupWebView2UserDataFolder();
string svgData = null;
bool blocked = false;
try
{
using (var stream = new ReadonlyStream(dataSource as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
}
}
blocked = SvgPreviewHandlerHelper.CheckBlockedElements(svgData);
}
catch (Exception ex)
{
PreviewError(ex, dataSource);
return;
}
try
{
svgData = SvgPreviewHandlerHelper.AddStyleSVG(svgData);
}
catch (Exception ex)
{
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewError {
Message = ex.Message
});
}
InvokeOnControlThread(() =>
{
try
{
_infoBarAdded = false;
// Add a info bar on top of the Preview if any blocked element is present.
if (blocked)
{
_infoBarAdded = true;
AddTextBoxControl(Properties.Resource.BlockedElementInfoText);
}
AddWebViewControl(svgData);
Resize += FormResized;
base.DoPreview(dataSource);
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewed());
}
catch (Exception ex)
{
PreviewError(ex, dataSource);
}
});
}
public void CheckBlockedElementsShouldReturnFalseIfSvgDataIsNullOrWhiteSpaces(string svgData)
{
// Arrange
bool foundFilteredElement;
// Act
foundFilteredElement = SvgPreviewHandlerHelper.CheckBlockedElements(svgData);
// Assert
Assert.IsFalse(foundFilteredElement);
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Stream reference to access source file.</param>
public override void DoPreview <T>(T dataSource)
{
string svgData = null;
bool blocked = false;
try
{
using (var stream = new ReadonlyStream(dataSource as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
}
}
blocked = SvgPreviewHandlerHelper.CheckBlockedElements(svgData);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
#pragma warning restore CA1031 // Do not catch general exception types
{
PreviewError(ex, dataSource);
return;
}
InvokeOnControlThread(() =>
{
try
{
_infoBarAdded = false;
// Add a info bar on top of the Preview if any blocked element is present.
if (blocked)
{
_infoBarAdded = true;
AddTextBoxControl(Resource.BlockedElementInfoText);
}
AddBrowserControl(svgData);
Resize += FormResized;
base.DoPreview(dataSource);
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewed());
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
#pragma warning restore CA1031 // Do not catch general exception types
{
PreviewError(ex, dataSource);
}
});
}
public void CheckBlockedElementsShouldReturnTrueIfABlockedElementIsPresent()
{
// Arrange
var svgBuilder = new StringBuilder();
svgBuilder.AppendLine("<svg width =\"200\" height=\"200\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">");
svgBuilder.AppendLine("\t<script>alert(\"hello\")</script>");
svgBuilder.AppendLine("</svg>");
bool foundFilteredElement;
// Act
foundFilteredElement = SvgPreviewHandlerHelper.CheckBlockedElements(svgBuilder.ToString());
// Assert
Assert.IsTrue(foundFilteredElement);
}
public void CheckBlockedElementsShouldReturnFalseIfNoBlockedElementsArePresent()
{
// Arrange
var svgBuilder = new StringBuilder();
svgBuilder.AppendLine("<svg viewBox=\"0 0 100 100\" xmlns=\"http://www.w3.org/2000/svg\">");
svgBuilder.AppendLine("\t<circle cx=\"50\" cy=\"50\" r=\"50\">");
svgBuilder.AppendLine("\t</circle>");
svgBuilder.AppendLine("</svg>");
bool foundFilteredElement;
// Act
foundFilteredElement = SvgPreviewHandlerHelper.CheckBlockedElements(svgBuilder.ToString());
// Assert
Assert.IsFalse(foundFilteredElement);
}
public void CheckBlockedElements_ShouldReturnTrue_IfMultipleBlockedElementsArePresent()
{
// Arrange
var svgBuilder = new StringBuilder();
svgBuilder.AppendLine("<svg width =\"200\" height=\"200\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">");
svgBuilder.AppendLine("\t<script>alert(\"valid-message\")</script>");
svgBuilder.AppendLine("\t<image href=\"valid-url\" height=\"200\" width=\"200\"/>");
svgBuilder.AppendLine("</svg>");
bool foundFilteredElement;
// Act
foundFilteredElement = SvgPreviewHandlerHelper.CheckBlockedElements(svgBuilder.ToString());
// Assert
Assert.IsTrue(foundFilteredElement);
}
public void CheckBlockedElementsShouldReturnTrueIfBlockedElementsIsPresentInNestedLevel()
{
// Arrange
var svgBuilder = new StringBuilder();
svgBuilder.AppendLine("<svg viewBox=\"0 0 100 100\" xmlns=\"http://www.w3.org/2000/svg\">");
svgBuilder.AppendLine("\t<circle cx=\"50\" cy=\"50\" r=\"50\">");
svgBuilder.AppendLine("\t\t<script>alert(\"valid-message\")</script>");
svgBuilder.AppendLine("\t</circle>");
svgBuilder.AppendLine("</svg>");
bool foundFilteredElement;
// Act
foundFilteredElement = SvgPreviewHandlerHelper.CheckBlockedElements(svgBuilder.ToString());
// Assert
Assert.IsTrue(foundFilteredElement);
}
/// <inheritdoc/>
public void GetThumbnail(uint cx, out IntPtr phbmp, out WTS_ALPHATYPE pdwAlpha)
{
phbmp = IntPtr.Zero;
pdwAlpha = WTS_ALPHATYPE.WTSAT_UNKNOWN;
if (cx == 0 || cx > MaxThumbnailSize)
{
return;
}
string svgData = null;
using (var stream = new ReadonlyStream(this.Stream as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
try
{
// Fixes #17527 - Inkscape v1.1 swapped order of default and svg namespaces in svg file (default first, svg after).
// That resulted in parser being unable to parse it correctly and instead of svg, text was previewed.
// MS Edge and Firefox also couldn't preview svg files with mentioned order of namespaces definitions.
svgData = SvgPreviewHandlerHelper.SwapNamespaces(svgData);
svgData = SvgPreviewHandlerHelper.AddStyleSVG(svgData);
}
catch (Exception)
{
}
}
}
if (svgData != null)
{
using (Bitmap thumbnail = GetThumbnail(svgData, cx))
{
if (thumbnail != null && thumbnail.Size.Width > 0 && thumbnail.Size.Height > 0)
{
phbmp = thumbnail.GetHbitmap();
pdwAlpha = WTS_ALPHATYPE.WTSAT_RGB;
}
}
}
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Stream reference to access source file.</param>
public override void DoPreview <T>(T dataSource)
{
this.InvokeOnControlThread(() =>
{
try
{
this.infoBarAdded = false;
string svgData = null;
using (var stream = new StreamWrapper(dataSource as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
}
}
// Add a info bar on top of the Preview if any blocked element is present.
if (SvgPreviewHandlerHelper.CheckBlockedElements(svgData))
{
this.infoBarAdded = true;
this.AddTextBoxControl(Resource.BlockedElementInfoText);
}
this.AddBrowserControl(svgData);
this.Resize += this.FormResized;
base.DoPreview(dataSource);
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewed());
}
catch (Exception ex)
{
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewError {
Message = ex.Message
});
this.Controls.Clear();
this.infoBarAdded = true;
this.AddTextBoxControl(Resource.SvgNotPreviewedError);
base.DoPreview(dataSource);
}
});
}
/// <inheritdoc/>
public void GetThumbnail(uint cx, out IntPtr phbmp, out WTS_ALPHATYPE pdwAlpha)
{
phbmp = IntPtr.Zero;
pdwAlpha = WTS_ALPHATYPE.WTSAT_UNKNOWN;
if (cx == 0 || cx > MaxThumbnailSize)
{
return;
}
string svgData = null;
using (var stream = new ReadonlyStream(this.Stream as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
try
{
svgData = SvgPreviewHandlerHelper.AddStyleSVG(svgData);
}
catch (Exception)
{
}
}
}
if (svgData != null)
{
using (Bitmap thumbnail = GetThumbnail(svgData, cx))
{
if (thumbnail != null && thumbnail.Size.Width > 0 && thumbnail.Size.Height > 0)
{
phbmp = thumbnail.GetHbitmap();
pdwAlpha = WTS_ALPHATYPE.WTSAT_RGB;
}
}
}
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Stream reference to access source file.</param>
public override void DoPreview <T>(T dataSource)
{
CleanupWebView2UserDataFolder();
string svgData = null;
bool blocked = false;
try
{
using (var stream = new ReadonlyStream(dataSource as IStream))
{
using (var reader = new StreamReader(stream))
{
svgData = reader.ReadToEnd();
}
}
blocked = SvgPreviewHandlerHelper.CheckBlockedElements(svgData);
}
catch (Exception ex)
{
PreviewError(ex, dataSource);
return;
}
try
{
// Fixes #17527 - Inkscape v1.1 swapped order of default and svg namespaces in svg file (default first, svg after).
// That resulted in parser being unable to parse it correctly and instead of svg, text was previewed.
// MS Edge and Firefox also couldn't preview svg files with mentioned order of namespaces definitions.
svgData = SvgPreviewHandlerHelper.SwapNamespaces(svgData);
svgData = SvgPreviewHandlerHelper.AddStyleSVG(svgData);
}
catch (Exception ex)
{
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewError {
Message = ex.Message
});
}
InvokeOnControlThread(() =>
{
try
{
_infoBarAdded = false;
// Add a info bar on top of the Preview if any blocked element is present.
if (blocked)
{
_infoBarAdded = true;
AddTextBoxControl(Properties.Resource.BlockedElementInfoText);
}
AddWebViewControl(svgData);
Resize += FormResized;
base.DoPreview(dataSource);
PowerToysTelemetry.Log.WriteEvent(new SvgFilePreviewed());
}
catch (Exception ex)
{
PreviewError(ex, dataSource);
}
});
}
