private void RenderCode()
{
if (_rootElement == null || string.IsNullOrEmpty(Code))
{
return;
}
try
{
IGrammar grammar = null;
switch (HighlightLanguage)
{
case HighlightLanguage.Python:
grammar = new PythonGrammar();
break;
case HighlightLanguage.JavaScript:
grammar = new JavascriptGrammar();
break;
case HighlightLanguage.CSharp:
grammar = new CSharpGrammar();
break;
case HighlightLanguage.XML:
grammar = new XMLGrammar();
break;
case HighlightLanguage.JSON:
grammar = new JSONGrammar();
break;
case HighlightLanguage.SQL:
grammar = new SQLGrammar();
break;
case HighlightLanguage.PHP:
grammar = new PHPGrammar();
break;
case HighlightLanguage.Ruby:
grammar = new RubyGrammar();
break;
case HighlightLanguage.CPlusPlus:
grammar = new CPlusPlusGrammar();
break;
case HighlightLanguage.CSS:
grammar = new CSSGrammar();
break;
case HighlightLanguage.Java:
grammar = new JavaGrammar();
break;
default:
break;
}
var textBlock = new RichTextBlock();
var paragraph = new Paragraph()
{
FontFamily = new FontFamily("Consolas"),
};
if (grammar != null)
{
Tokenizer lexer = new Tokenizer(grammar);
StringBuilder builder = new StringBuilder();
foreach (var token in lexer.Tokenize(Code))
{
var brush = BrushForTokenType(token.Type);
if (brush != null)
{
if (builder.Length > 0)
{
paragraph.Inlines.Add(new Run()
{
Text = builder.ToString()
});
builder.Clear();
}
paragraph.Inlines.Add(new Run()
{
Text = Code.Substring(token.StartIndex, token.Length),
Foreground = brush,
});
}
else
{
builder.Append(Code.Substring(token.StartIndex, token.Length));
}
}
if (builder.Length > 0)
{
paragraph.Inlines.Add(new Run()
{
Text = builder.ToString()
});
builder.Clear();
}
}
else
{
var run = new Run()
{
Text = Code,
};
paragraph.Inlines.Add(run);
}
textBlock.Blocks.Add(paragraph);
_rootElement.Child = textBlock;
}
catch (Exception ex)
{
_rootElement.Child = new TextBlock()
{
Text = $"Unable to display this code. The error was: {ex.Message}"
};
}
}
