public void ExtractSnippet()
{
// Declare content
const string content =
@"Some
Content
Here";
// Mock file system
IFileSystem fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ "Content.txt", new MockFileData(content) }
});
// Run the extraction
DefaultSnippetExtractor extractor = new DefaultSnippetExtractor();
FileInfoBase fileInfoBase = fileSystem.FileInfo.FromFileName("Content.txt");
Extension.Model.PlainTextSnippet snippet = extractor.Extract(fileInfoBase, null) as Extension.Model.PlainTextSnippet;
// Load the expected file content
MemoryStream memoryStream = new MemoryStream();
using (var fileReader = new StreamReader(fileInfoBase.OpenRead()))
using (var fileWriter = new StreamWriter(memoryStream))
{
fileWriter.Write(fileReader.ReadToEnd());
}
// Assert
Assert.AreEqual(content, snippet.Text);
}
/// <summary>
/// Handles the snippet extension:
/// @snippet language [filename] pattern
///
/// where 'language' can be: cs, xml or txt. If something else, txt is used
/// '[filename]' is evaluated relatively to the document location of the current document.
/// 'pattern' is the pattern passed to the extractor, which is determined based on the language. This is Projbook code.
///
/// The read snippet is wrapped in a fenced code block with language as language marker, except for txt, which will get 'nohighlight'.
/// This fenced code block is then parsed again and that result is returned as b's data.
/// </summary>
/// <param name="b">The block to handle.</param>
/// <returns></returns>
private bool HandleSnippetExtension(Block b)
{
// skip @snippet
if(!SkipString("@snippet"))
{
return false;
}
if(!SkipLinespace())
{
return false;
}
// language
var language = string.Empty;
if(!SkipIdentifier(ref language))
{
return false;
}
if(!SkipLinespace())
{
return false;
}
// [filename]
if(!this.SkipChar('['))
{
return false;
}
// mark start of filename string
this.Mark();
if(!this.Find(']'))
{
return false;
}
string filename = this.Extract();
if(string.IsNullOrWhiteSpace(filename))
{
return false;
}
if(!SkipChar(']'))
{
return false;
}
if(!SkipLinespace())
{
return false;
}
// pattern
var patternStart = this.Position;
SkipToEol();
var pattern = this.Input.Substring(patternStart, this.Position - patternStart);
SkipToNextLine();
language = language.ToLowerInvariant();
ISnippetExtractor extractor = null;
switch(language)
{
case "cs":
extractor = new CSharpSnippetExtractor();
break;
case "xml":
extractor = new XmlSnippetExtractor();
break;
default:
// text
language = "nohighlight";
extractor = new DefaultSnippetExtractor();
break;
}
// extract the snippet, then build the fenced block to return.
var fullFilename = Path.Combine(Path.GetDirectoryName(m_markdown.SourceDocumentFilename) ?? string.Empty, filename);
var snippetText = extractor.Extract(fullFilename, pattern) ?? string.Empty;
b.BlockType = BlockType.codeblock;
b.Data = language;
var child = CreateBlock();
child.BlockType = BlockType.indent;
child.Buf = snippetText;
child.ContentStart = 0;
child.ContentEnd = snippetText.Length;
b.Children = new List<Block>() { child};
return true;
}