private async void button1_Click(object sender, EventArgs e)
{
this.button1.Enabled = false;
try
{
WebBrowserExt.SetFeatureBrowserEmulation(); // enable HTML5
var cts = new CancellationTokenSource((int)TimeSpan.FromMinutes(3).TotalMilliseconds);
await ScrapSitesAsync(
new[] { "http://example.com", "http://example.org", "http://example.net" },
cts.Token);
MessageBox.Show("Completed.");
}
catch (Exception ex)
{
while (ex is AggregateException && ex.InnerException != null)
{
ex = ex.InnerException;
}
MessageBox.Show(ex.Message);
}
this.button1.Enabled = true;
}
/// <summary>
/// Wrap the SVG markup in HTML with a meta tag to ensure the
/// WebBrowser control is in Edge mode to enable SVG rendering.
/// We also set the padding and margin for the body to zero as
/// there is a default margin of 8.
/// </summary>
/// <param name="content">The content to render.</param>
/// <param name="cx">The maximum thumbnail size, in pixels.</param>
/// <returns>A thumbnail of the rendered content.</returns>
public static Bitmap GetThumbnail(string content, uint cx)
{
if (cx > MaxThumbnailSize)
{
return(null);
}
Bitmap thumbnail = null;
// Wrap the SVG content in HTML in IE Edge mode so we can ensure
// we render properly.
string wrappedContent = WrapSVGInHTML(content);
WebBrowserExt browser = new WebBrowserExt();
browser.Dock = DockStyle.Fill;
browser.IsWebBrowserContextMenuEnabled = false;
browser.ScriptErrorsSuppressed = true;
browser.ScrollBarsEnabled = false;
browser.AllowNavigation = false;
browser.Width = (int)cx;
browser.Height = (int)cx;
browser.DocumentText = wrappedContent;
// Wait for the browser to render the content.
while (browser.IsBusy || browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
// Check size of the rendered SVG.
var svg = browser.Document.GetElementsByTagName("svg").Cast <HtmlElement>().FirstOrDefault();
if (svg != null)
{
// Update the size of the browser control to fit the SVG
// in the visible viewport.
browser.Width = svg.OffsetRectangle.Width;
browser.Height = svg.OffsetRectangle.Height;
// Wait for the browser to render the content.
while (browser.IsBusy || browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
// Capture the image of the SVG from the browser.
thumbnail = GetBrowserContentImage(browser, svg.OffsetRectangle, Color.White);
if (thumbnail.Width != cx && thumbnail.Height != cx)
{
// We are not the appropriate size for caller. Resize now while
// respecting the aspect ratio.
float scale = Math.Min((float)cx / thumbnail.Width, (float)cx / thumbnail.Height);
int scaleWidth = (int)(thumbnail.Width * scale);
int scaleHeight = (int)(thumbnail.Height * scale);
thumbnail = ResizeImage(thumbnail, scaleWidth, scaleHeight);
}
}
return(thumbnail);
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Path to the file.</param>
public override void DoPreview <T>(T dataSource)
{
this.InvokeOnControlThread(() =>
{
try
{
this.infoBarDisplayed = false;
StringBuilder sb = new StringBuilder();
string filePath = dataSource as string;
string fileText = File.ReadAllText(filePath);
this.extension.BaseUrl = Path.GetDirectoryName(filePath);
Regex rgx = new Regex(@"<[ ]*img.*>");
if (rgx.IsMatch(fileText))
{
this.infoBarDisplayed = true;
}
MarkdownPipeline pipeline = this.pipelineBuilder.Build();
string parsedMarkdown = Markdown.ToHtml(fileText, pipeline);
sb.AppendFormat("{0}{1}{2}", this.htmlHeader, parsedMarkdown, this.htmlFooter);
string markdownHTML = sb.ToString();
this.browser = new WebBrowserExt
{
DocumentText = markdownHTML,
Dock = DockStyle.Fill,
IsWebBrowserContextMenuEnabled = false,
ScriptErrorsSuppressed = true,
ScrollBarsEnabled = true,
AllowNavigation = false,
};
this.Controls.Add(this.browser);
if (this.infoBarDisplayed)
{
this.infoBar = this.GetTextBoxControl(Resources.BlockedImageInfoText);
this.Controls.Add(this.infoBar);
}
this.Resize += this.FormResized;
base.DoPreview(dataSource);
MarkdownTelemetry.Log.MarkdownFilePreviewed();
}
catch (Exception e)
{
MarkdownTelemetry.Log.MarkdownFilePreviewError(e.Message);
this.infoBarDisplayed = true;
this.infoBar = this.GetTextBoxControl(Resources.MarkdownNotPreviewedError);
this.Resize += this.FormResized;
this.Controls.Clear();
this.Controls.Add(this.infoBar);
base.DoPreview(dataSource);
}
});
}
/// <summary>
/// Adds a Web Browser Control to Control Collection.
/// </summary>
/// <param name="svgData">Svg to display on Browser Control.</param>
private void AddBrowserControl(string svgData)
{
this.browser = new WebBrowserExt();
this.browser.DocumentText = svgData;
this.browser.Dock = DockStyle.Fill;
this.browser.IsWebBrowserContextMenuEnabled = false;
this.browser.ScriptErrorsSuppressed = true;
this.browser.ScrollBarsEnabled = true;
this.browser.AllowNavigation = false;
this.Controls.Add(this.browser);
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Path to the file.</param>
public override void DoPreview <T>(T dataSource)
{
this.InvokeOnControlThread(() =>
{
try
{
LoadConfig();
string filePath = dataSource as string;
FileInfo fileInfo = new FileInfo(filePath);
string html = "";
if (fileInfo.Length > maxFileSize)
{
html = GenerateBigFileHTML(filePath, fileInfo.Length);
}
else
{
html = GenerateHighlightHTML(filePath);
}
//string html = String.Format("<html><body>{0}, {1}, {2}</body></html>", highLighter, highLighterArgs, filePath);
//CodeTelemetry.Info(String.Format("html: %s", html));
this.browser = new WebBrowserExt
{
DocumentText = html,
Dock = DockStyle.Fill,
IsWebBrowserContextMenuEnabled = true,
ScriptErrorsSuppressed = true,
ScrollBarsEnabled = true,
AllowNavigation = false,
};
this.Controls.Add(this.browser);
base.DoPreview(dataSource);
}
catch (Exception e)
{
CodeTelemetry.Info(e.Message);
base.DoPreview(dataSource);
}
});
}
public SerferService()
{
// CancellationToken cancelToken
WebBrowserExt.SetFeatureBrowserEmulation();
_cancelToken = new CancellationToken();
// create an independent STA thread
_apartment = new MessageLoopApartment();
// create a WebBrowser on that STA thread
_browser = _apartment.Run(() => new WebBrowser(), _cancelToken).Result;
//// Add a handler for the web browser to auto comlete registration
//_browser.DocumentCompleted += WebBrowser_DocumentCompleted;
//// Add a handler for the web browser to capture content change
//_browser.DocumentTitleChanged += WebBrowser_DocumentTitleChanged;
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Path to the file.</param>
public override void DoPreview <T>(T dataSource)
{
this.infoBarDisplayed = false;
try
{
if (!(dataSource is string filePath))
{
throw new ArgumentException($"{nameof(dataSource)} for {nameof(MarkdownPreviewHandler)} must be a string but was a '{typeof(T)}'");
}
string fileText = File.ReadAllText(filePath);
Regex imageTagRegex = new Regex(@"<[ ]*img.*>");
if (imageTagRegex.IsMatch(fileText))
{
this.infoBarDisplayed = true;
}
this.extension.BaseUrl = Path.GetDirectoryName(filePath);
MarkdownPipeline pipeline = this.pipelineBuilder.Build();
string parsedMarkdown = Markdown.ToHtml(fileText, pipeline);
string markdownHTML = $"{this.htmlHeader}{parsedMarkdown}{this.htmlFooter}";
this.InvokeOnControlThread(() =>
{
this.browser = new WebBrowserExt
{
DocumentText = markdownHTML,
Dock = DockStyle.Fill,
IsWebBrowserContextMenuEnabled = false,
ScriptErrorsSuppressed = true,
ScrollBarsEnabled = true,
AllowNavigation = false,
};
this.Controls.Add(this.browser);
if (this.infoBarDisplayed)
{
this.infoBar = this.GetTextBoxControl(Resources.BlockedImageInfoText);
this.Resize += this.FormResized;
this.Controls.Add(this.infoBar);
}
});
PowerToysTelemetry.Log.WriteEvent(new MarkdownFilePreviewed());
}
catch (Exception e)
{
PowerToysTelemetry.Log.WriteEvent(new MarkdownFilePreviewError {
Message = e.Message
});
this.InvokeOnControlThread(() =>
{
this.Controls.Clear();
this.infoBarDisplayed = true;
this.infoBar = this.GetTextBoxControl(Resources.MarkdownNotPreviewedError);
this.Resize += this.FormResized;
this.Controls.Add(this.infoBar);
});
}
finally
{
base.DoPreview(dataSource);
}
}
/// <summary>
/// Start the preview on the Control.
/// </summary>
/// <param name="dataSource">Path to the file.</param>
public override void DoPreview<T>(T dataSource)
{
_infoBarDisplayed = false;
try
{
if (!(dataSource is string filePath))
{
throw new ArgumentException($"{nameof(dataSource)} for {nameof(CodeFilePreviewHandler)} must be a string but was a '{typeof(T)}'");
}
string ext = Path.GetExtension(filePath);
string fileText = File.ReadAllText(filePath);
string codeFileHTML = string.Empty;
if (ext.Equals(".xml", StringComparison.OrdinalIgnoreCase))
{
codeFileHTML = fileText;
}
else
{
StyleDic theme = StyleDic.DefaultLight;
string background = "{background:#FFFFFF;}";
string baseColor = ControlzEx.Theming.WindowsThemeHelper.GetWindowsBaseColor();
if (baseColor == "Dark")
{
theme = StyleDic.DefaultDark;
background = "{background:#202020;}";
}
string header = string.Format(System.Globalization.CultureInfo.CurrentCulture, htmlHeader, background);
HtmlFormatter formatter = new HtmlFormatter(theme);
codeFileHTML = formatter.GetHtmlString(fileText, GetLanguageByExtension(ext));
codeFileHTML = $"{header}{codeFileHTML}{htmlFooter}";
}
/* not work, why? the result of "codeFileHTML" is right. render fail.
string lang = GetLangByExtension(ext);
string js = File.ReadAllText(@"C:\res\shjs\sh_main.min.js");
string jsLang = File.ReadAllText($"C:\\res\\shjs\\lang\\sh_{lang}.min.js");
string css = File.ReadAllText(@"C:\res\shjs\css\default.css");
string header = $"<!doctype html><html><head><style>{css}</style><script>{js}{jsLang}</script></head><body onload=\"sh_highlightDocument();\">";
string footer = "</body></html>";
string codeFileHTML = $"{header}<pre class=\"sh_{lang}\">{HttpUtility.HtmlEncode(fileText)}</pre>{footer}";
*/
InvokeOnControlThread(() =>
{
_browser = new WebBrowserExt
{
DocumentText = codeFileHTML,
Dock = DockStyle.Fill,
IsWebBrowserContextMenuEnabled = false,
ScriptErrorsSuppressed = true,
ScrollBarsEnabled = true,
AllowNavigation = false,
};
Controls.Add(_browser);
if (_infoBarDisplayed)
{
_infoBar = GetTextBoxControl(codeFileHTML);
Resize += FormResized;
Controls.Add(_infoBar);
}
});
PowerToysTelemetry.Log.WriteEvent(new CodeFilePreviewed());
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
#pragma warning restore CA1031 // Do not catch general exception types
{
PowerToysTelemetry.Log.WriteEvent(new CodeFilePreviewError { Message = ex.Message });
InvokeOnControlThread(() =>
{
Controls.Clear();
_infoBarDisplayed = true;
_infoBar = GetTextBoxControl(Resources.CodeFileNotPreviewedError);
Resize += FormResized;
Controls.Add(_infoBar);
});
}
finally
{
base.DoPreview(dataSource);
}
}