/// <summary>
/// Get current Gherkin language setting by scanning first 5 lines
/// </summary>
/// <param name="document"></param>
/// <returns>language defined in tag or English as default language</returns>
public static string CurrentLanguage(ICSharpCode.AvalonEdit.Document.TextDocument document)
{
var location = new Ast.Location();
ICSharpCode.AvalonEdit.Document.DocumentLine line = document.GetLineByNumber(1);
while (line != null)
{
string line_text = document.GetText(line.Offset, line.TotalLength);
Token token = new Token(new GherkinLine(line_text, line.LineNumber), location);
try
{
if (s_TokenMatcher.Match_Language(token) && IsSupported(token.MatchedText))
{
return(token.MatchedText);
}
if (line.LineNumber > 5)
{
return(DEFAULT_LANGUAGE);
}
line = line.NextLine;
}
catch
{
return(DEFAULT_LANGUAGE);
}
}
return(DEFAULT_LANGUAGE);
}
/// <inheritdoc/>
protected override IEnumerable <NewFolding> CreateNewFoldings(
AvalonEditDocument document, out int firstErrorOffset)
{
firstErrorOffset = -1;
List <NewFolding> foldings = new List <NewFolding>();
Stack <NewFolding> activeFoldings = new Stack <NewFolding>();
Stack <int> activeIndentations = new Stack <int>();
NewFolding activeFolding = null;
int activeIndentation = -1;
int endOffsetOfLastNonEmptyLine = 0;
for (int lineNumber = 1; lineNumber <= document.LineCount; lineNumber++)
{
var line = document.GetLineByNumber(lineNumber);
// Determine indentation of line.
int offset = line.Offset;
int indentation = 0;
bool isLineEmpty = true;
for (int i = 0; i < line.Length; i++)
{
if (char.IsWhiteSpace(document.GetCharAt(offset + i)))
{
indentation++;
}
else
{
// Found the first non-white space character.
isLineEmpty = false;
break;
}
}
// Skip empty lines.
if (isLineEmpty)
{
continue;
}
// If the indentation is less than the previous, then we close the last active
// folding.
if (indentation < activeIndentation)
{
// ReSharper disable once PossibleNullReferenceException
activeFolding.EndOffset = endOffsetOfLastNonEmptyLine;
// Keep foldings which span more than one line.
if (document.GetLineByOffset(activeFolding.StartOffset) != document.GetLineByOffset(activeFolding.EndOffset))
{
foldings.Add(activeFolding);
}
if (activeFoldings.Count > 0)
{
activeFolding = activeFoldings.Pop();
activeIndentation = activeIndentations.Pop();
}
else
{
activeFolding = null;
activeIndentation = -1;
}
// Test same line again. The previous folding could also end on this line.
lineNumber--;
continue;
}
endOffsetOfLastNonEmptyLine = line.EndOffset;
// If the indentation is larger than the previous indentation, we start a new
// folding.
if (indentation > 0 && indentation > activeIndentation)
{
// Store current folding on stack.
if (activeFolding != null)
{
activeFoldings.Push(activeFolding);
activeIndentations.Push(activeIndentation);
}
activeFolding = new NewFolding {
StartOffset = offset + indentation,
};
activeIndentation = indentation;
}
}
// Close all open foldings.
while (activeFoldings.Count > 0)
{
var folding = activeFoldings.Pop();
folding.EndOffset = endOffsetOfLastNonEmptyLine;
foldings.Add(folding);
}
foldings.Sort((a, b) => a.StartOffset.CompareTo(b.StartOffset));
return(foldings);
}
/// <inheritdoc/>
protected override IEnumerable<NewFolding> CreateNewFoldings(
AvalonEditDocument document, out int firstErrorOffset)
{
firstErrorOffset = -1;
List<NewFolding> foldings = new List<NewFolding>();
Stack<NewFolding> activeFoldings = new Stack<NewFolding>();
Stack<int> activeIndentations = new Stack<int>();
NewFolding activeFolding = null;
int activeIndentation = -1;
int endOffsetOfLastNonEmptyLine = 0;
for (int lineNumber = 1; lineNumber <= document.LineCount; lineNumber++)
{
var line = document.GetLineByNumber(lineNumber);
// Determine indentation of line.
int offset = line.Offset;
int indentation = 0;
bool isLineEmpty = true;
for (int i = 0; i < line.Length; i++)
{
if (char.IsWhiteSpace(document.GetCharAt(offset + i)))
{
indentation++;
}
else
{
// Found the first non-white space character.
isLineEmpty = false;
break;
}
}
// Skip empty lines.
if (isLineEmpty)
continue;
// If the indentation is less than the previous, then we close the last active
// folding.
if (indentation < activeIndentation)
{
// ReSharper disable once PossibleNullReferenceException
activeFolding.EndOffset = endOffsetOfLastNonEmptyLine;
// Keep foldings which span more than one line.
if (document.GetLineByOffset(activeFolding.StartOffset) != document.GetLineByOffset(activeFolding.EndOffset))
foldings.Add(activeFolding);
if (activeFoldings.Count > 0)
{
activeFolding = activeFoldings.Pop();
activeIndentation = activeIndentations.Pop();
}
else
{
activeFolding = null;
activeIndentation = -1;
}
// Test same line again. The previous folding could also end on this line.
lineNumber--;
continue;
}
endOffsetOfLastNonEmptyLine = line.EndOffset;
// If the indentation is larger than the previous indentation, we start a new
// folding.
if (indentation > 0 && indentation > activeIndentation)
{
// Store current folding on stack.
if (activeFolding != null)
{
activeFoldings.Push(activeFolding);
activeIndentations.Push(activeIndentation);
}
activeFolding = new NewFolding { StartOffset = offset + indentation, };
activeIndentation = indentation;
}
}
// Close all open foldings.
while (activeFoldings.Count > 0)
{
var folding = activeFoldings.Pop();
folding.EndOffset = endOffsetOfLastNonEmptyLine;
foldings.Add(folding);
}
foldings.Sort((a, b) => a.StartOffset.CompareTo(b.StartOffset));
return foldings;
}
