public static async Task <String> TryGetHighlightedCodeAsync([NotNull] String code, [NotNull] String path,
SyntaxHighlightStyle style, bool lineNumbers, CancellationToken token)
{
// Check if the code is possibly invalid
const int threshold = 50, length = 1000;
if (code.Substring(0, length > code.Length ? code.Length : length).Count(
c => char.IsControl(c) && c != '\n' && c != '\r' && c != '\t') > threshold)
{
return(null);
}
// Try to extract the code language
Match match = Regex.Match(path, @".*([.]\w+)");
if (!match.Success || match.Groups.Count != 2)
{
return(null);
}
String
extension = match.Groups[1].Value.ToLowerInvariant(),
lexer = UncommonExtensions.ContainsKey(extension)
? UncommonExtensions[extension]
: extension.Substring(1); // Remove the leading '.'
// Prepare the POST request content
Dictionary <String, String> values = new Dictionary <String, String>
{
{ "code", code }, // The code to highlight
{ "lexer", lexer }, // The code language
{ "style", style.ToString().ToLowerInvariant() }, // The requested syntax highlight style
{ "divstyles", "border:solid gray;border-width:.0em .0em .0em .0em;padding:.2em .6em;" }, // Default CSS properties
{ "linenos", lineNumbers ? "pls" : String.Empty } // Includes the line numbers if not empty
};
// Make the POST
WrappedHTTPWebResult <String> result = await HTTPHelper.POSTWithCacheSupportAsync(APIUrl, values, token);
// Check if the lexer is unsupported
if (result.StatusCode == HttpStatusCode.InternalServerError)
{
#if DEBUG
//For debugging, inform if an unsupported extesion is found
System.Diagnostics.Debug.WriteLine($"Possible unsupported extension: {extension} > {lexer}");
#endif
// Retry with the fallback lexer
values["lexer"] = FallbackLexer;
return((await HTTPHelper.POSTWithCacheSupportAsync(APIUrl, values, token)).Result);
}
// Return the result
return(result.Result);
}
public async Task Load(Tuple <Repository, string, string> repoPath) //This page recieves RepositoryId and name of the file
{
IsSupportedFile = true;
Repository = repoPath.Item1;
Path = repoPath.Item2;
if (!GlobalHelper.IsInternet())
{
//Sending NoInternet message to all viewModels
Messenger.Default.Send(new GlobalHelper.LocalNotificationMessageType {
Message = "No Internet", Glyph = "\uE704"
});
}
else
{
isLoading = true;
if (string.IsNullOrWhiteSpace(repoPath.Item3))
{
SelectedBranch = await RepositoryUtility.GetDefaultBranch(Repository.Id);
}
else
{
SelectedBranch = repoPath.Item3;
}
IsImage = false;
if ((Path.ToLower().EndsWith(".exe")) ||
(Path.ToLower().EndsWith(".pdf")) ||
(Path.ToLower().EndsWith(".ttf")) ||
(Path.ToLower().EndsWith(".suo")) ||
(Path.ToLower().EndsWith(".mp3")) ||
(Path.ToLower().EndsWith(".mp4")) ||
(Path.ToLower().EndsWith(".avi")))
{
/*
* Unsupported file types
*/
IsSupportedFile = false;
isLoading = false;
return;
}
if ((Path.ToLower()).EndsWith(".png") ||
(Path.ToLower()).EndsWith(".jpg") ||
(Path.ToLower()).EndsWith(".jpeg") ||
(Path.ToLower().EndsWith(".gif")))
{
/*
* Image file types
*/
IsImage = true;
Uri uri = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))[0].Content.DownloadUrl;
ImageFile = new BitmapImage(uri);
isLoading = false;
return;
}
if ((Path.ToLower()).EndsWith(".md"))
{
/*
* Files with .md extension
*/
TextContent = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))[0].Content.Content;
isLoading = false;
return;
}
/*
* Code files
*/
String content = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))?[0].Content.Content;
if (content == null)
{
IsSupportedFile = false;
isLoading = false;
return;
}
SyntaxHighlightStyle style = (SyntaxHighlightStyle)SettingsService.Get <int>(SettingsKeys.HighlightStyleIndex);
bool lineNumbers = SettingsService.Get <bool>(SettingsKeys.ShowLineNumbers);
HTMLContent = await HiliteAPI.TryGetHighlightedCodeAsync(content, Path, style, lineNumbers, CancellationToken.None);
if (HTMLContent == null)
{
/*
* Plain text files (Getting HTML for syntax highlighting failed)
*/
RepositoryContent result = await RepositoryUtility.GetRepositoryContentTextByPath(Repository, Path, SelectedBranch);
TextContent = result.Content;
}
if (HTMLContent == null && TextContent == null)
{
IsSupportedFile = false;
}
isLoading = false;
}
}
private static async void OnHighlightStylePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// Unpack the parameters and lock the UI
Hilite_meHighlightStylePreviewControl @this = d.To <Hilite_meHighlightStylePreviewControl>();
await @this.AnimationSemaphore.WaitAsync();
SyntaxHighlightStyle style = e.NewValue.To <SyntaxHighlightStyle>();
// Check if there's a background transition
HighlightTransitionType transition = HighlightTransitionType.None;
if (e.OldValue != DependencyProperty.UnsetValue && e.OldValue != null)
{
SyntaxHighlightStyle old = e.OldValue.To <SyntaxHighlightStyle>();
if (LightStyles.Contains(style) && !LightStyles.Contains(old))
{
// Dark to light transition needed
transition = HighlightTransitionType.DarkToLight;
}
else if (!LightStyles.Contains(style) && LightStyles.Contains(old))
{
// Light to dark transition
transition = HighlightTransitionType.LightToDark;
}
}
else
{
bool light = LightStyles.Contains(style);
@this.FadeCanvas.Background = new SolidColorBrush(light ? Colors.White : Colors.Black);
@this.WebControl.DefaultBackgroundColor = light ? Colors.White : Colors.Black;
}
// Function to load the sample HTML
Task <String> htmlTask = @this.LoadHTMLPreviewAsync();
// Await the out animations and the HTML loading
List <Task> outTasks = new List <Task>
{
@this.BlurAsync(20, TimeSpan.FromMilliseconds(AnimationDuration)),
htmlTask
};
if (transition != HighlightTransitionType.None)
{
@this.FadeCanvas.Background = new SolidColorBrush(transition == HighlightTransitionType.LightToDark ? Colors.Black : Colors.White);
outTasks.Add(
@this.WebControl.StartCompositionFadeScaleAnimationAsync(1, 0.4f, 1, 1.05f, AnimationDuration, null, null, EasingFunctionNames.Linear));
}
else
{
outTasks.Add(
@this.WebControl.StartCompositionScaleAnimationAsync(1, 1.05f, AnimationDuration, null, EasingFunctionNames.Linear));
}
await Task.WhenAll(outTasks);
// Show the HTML, animate back in and then release the semaphore
@this.WebControl.SetVisualOpacity(1);
@this.WebControl.NavigateToString(htmlTask.Result);
await Task.WhenAll(
@this.WebControl.StartCompositionScaleAnimationAsync(1.05f, 1, AnimationDuration, null, EasingFunctionNames.Linear),
@this.BlurAsync(0, TimeSpan.FromMilliseconds(AnimationDuration)));
if (@this.LoadingRing.Visibility == Visibility.Visible)
{
@this.LoadingRing.Visibility = Visibility.Collapsed;
}
@this.AnimationSemaphore.Release();
}
public async Task Load(Tuple <Repository, string, string> repoPath) //This page recieves RepositoryId and name of the file
{
IsSupportedFile = true;
Repository = repoPath.Item1;
Path = repoPath.Item2;
if (string.IsNullOrWhiteSpace(repoPath.Item3))
{
SelectedBranch = await RepositoryUtility.GetDefaultBranch(Repository.Id);
}
else
{
SelectedBranch = repoPath.Item3;
}
MarkdownOptions options = new MarkdownOptions
{
AsteriskIntraWordEmphasis = true,
AutoNewlines = true,
StrictBoldItalic = true,
AutoHyperlink = false,
LinkEmails = true
};
Markdown markDown = new Markdown(options);
if (!GlobalHelper.IsInternet())
{
Messenger.Default.Send(new GlobalHelper.NoInternetMessageType()); //Sending NoInternet message to all viewModels
}
else
{
Messenger.Default.Send(new GlobalHelper.HasInternetMessageType()); //Sending Internet available message to all viewModels
isLoading = true;
IsImage = false;
if ((Path.ToLower().EndsWith(".exe")) ||
(Path.ToLower().EndsWith(".pdf")) ||
(Path.ToLower().EndsWith(".ttf")) ||
(Path.ToLower().EndsWith(".suo")) ||
(Path.ToLower().EndsWith(".mp3")) ||
(Path.ToLower().EndsWith(".mp4")) ||
(Path.ToLower().EndsWith(".avi")))
{
/*
* Unsupported file types
*/
IsSupportedFile = false;
isLoading = false;
return;
}
if ((Path.ToLower()).EndsWith(".png") ||
(Path.ToLower()).EndsWith(".jpg") ||
(Path.ToLower()).EndsWith(".jpeg") ||
(Path.ToLower().EndsWith(".gif")))
{
/*
* Image file types
*/
IsImage = true;
// TODO: loading the WHOLE files list is really necessary here?
var uri = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))[0].Content.DownloadUrl;
ImageFile = new BitmapImage(uri);
isLoading = false;
return;
}
if ((Path.ToLower()).EndsWith(".md"))
{
/*
* Files with .md extension will be shown with full markdown
*/
HTMLBackgroundColor = Colors.White;
var str = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))[0].Content.Content;
HTMLContent = "<html><head><meta charset = \"utf-8\" /></head><body style=\"font-family: sans-serif\">" + markDown.Transform(str) + "</body></html>";
isLoading = false;
return;
}
String content = (await RepositoryUtility.GetRepositoryContentByPath(Repository, Path, SelectedBranch))?[0].Content.Content;
if (content == null)
{
IsSupportedFile = false;
isLoading = false;
return;
}
SyntaxHighlightStyle style = (SyntaxHighlightStyle)SettingsService.Get <int>(SettingsKeys.HighlightStyleIndex);
bool lineNumbers = SettingsService.Get <bool>(SettingsKeys.ShowLineNumbers);
HTMLContent = await HiliteAPI.TryGetHighlightedCodeAsync(content, Path, style, lineNumbers, CancellationToken.None);
IsSupportedFile = HTMLContent != null;
isLoading = false;
}
}