private string PrcessCodeSnippetHeaders(string content)
{
var parser = new HtmlParser(content);
var codeSnippetBlocks = parser.GetElements("code");
if (codeSnippetBlocks == null)
{
return content;
}
string language = string.Empty;
int currentCount = 1;
int total = codeSnippetBlocks.Count();
foreach (var codeBlock in codeSnippetBlocks)
{
// Notifying progress
ProgressNotificationHelper.ReportProgress(currentCount / total, "Processing Code Snippets Headers");
currentCount++;
if (!codeBlock.Attributes.Contains("class"))
{
continue;
}
language = codeBlock.Attributes["class"].Value;
if (!string.IsNullOrWhiteSpace(language))
{
codeBlock.ParentNode.ParentNode.InsertBefore(
HtmlNode.CreateNode(string.Format(CodeHeaderTemplate, language)),
codeBlock.ParentNode);
}
}
return parser.Html;
}
public List<CodeSnippet> GetCodeSnippets(string markdownContent, string[] externalSnippets)
{
var parser = new HtmlParser(markdownContent);
List<CodeSnippet> snippets = default(List<CodeSnippet>);
snippets = this.ReadSnippets(parser);
snippets.AddRange(this.GetExternalSnippets());
return snippets;
}
public CodeSnippetHighlighter(string htmlText)
{
this.parser = new HtmlParser(htmlText);
this.originalText = htmlText;
}
private List<CodeSnippet> ReadSnippets(HtmlParser parser)
{
List<CodeSnippet> codeSnippetsList = new List<CodeSnippet>();
var codeNodes = parser.GetElements("pre/code");
if (codeNodes == null)
{
return codeSnippetsList;
}
StepNotificationHelper.Initialize(codeNodes.Count() + 1);
StepNotificationHelper.Step("Scanning snippets...");
foreach (HtmlNode codeElement in codeNodes)
{
if (this.Cancel)
{
throw new OperationCanceledException("Operation Cancelled");
}
StepNotificationHelper.Step();
var previousElement = parser.FindPreviousElement(codeElement.ParentNode);
if (previousElement != null && previousElement.Name == "span")
{
previousElement = parser.FindPreviousElement(previousElement);
}
if (previousElement == null || (previousElement.Name != "p" && previousElement.NodeType != HtmlNodeType.Comment))
{
continue;
}
HtmlNode commentNode = null;
if (previousElement.NodeType == HtmlNodeType.Comment)
{
commentNode = previousElement;
previousElement = parser.FindPreviousElement(previousElement);
if (previousElement.Name != "p" || !previousElement.InnerText.StartsWith("(Code Snippet"))
{
continue;
}
}
// Check that title format is "(Code Snippet - title goes here)"
Regex codeSnippetRegex = new Regex(@"^\(Code Snippet \p{Pd} .+\)$");
if (!codeSnippetRegex.IsMatch(previousElement.InnerText))
{
continue;
}
// Check that the language name is not null nor an empty string
string languageName;
if (codeElement.Attributes["Class"] != null)
{
languageName = HttpUtility.HtmlDecode(codeElement.Attributes["Class"].Value).Trim();
languageName = this.StandardizeCodeLanguage(languageName);
if (languageName == string.Empty)
{
continue;
}
}
else
{
continue;
}
// Search for the code snippet title
string codeSnippetTitle = HttpUtility.HtmlDecode(previousElement.InnerText);
codeSnippetTitle = codeSnippetTitle.Substring(16, codeSnippetTitle.Length - 17);
CodeSnippet codeSnippet = new CodeSnippet(this.SnippetTemplate, this.VSContentTemplate)
{
Code = HttpUtility.HtmlDecode(codeElement.InnerText.Trim()),
Language = languageName,
Title = codeSnippetTitle,
Author = this.Author
};
var commentLine = string.Empty;
if (commentNode != null)
{
commentLine = commentNode.InnerText.Replace("<!--", string.Empty).Replace("-->", string.Empty);
}
try
{
this.WrapUpSnippetCode(codeSnippet, commentLine);
codeSnippet.Code = codeSnippet.Code.Trim();
codeSnippetsList.Add(codeSnippet);
}
catch (Exception)
{
continue;
}
}
return codeSnippetsList;
}
