/// <summary>
/// Gets a list of tokens from the IVsTextLines.
/// </summary>
/// <param name="lines">The IVsTextLines of the lines of source to parse.</param>
/// <param name="service">The language service.</param>
/// <returns>A list of tokens.</returns>
public static List <FactTokenInfo> GetTokens(IVsTextLines lines, FactEditorLanguageService service)
{
Source source = service.GetOrCreateSource(lines);
string lineText = source.GetLine(0);
// Get the scanner from the language service.
IScanner scanner = service.GetScanner(lines);
scanner.SetSource(lineText, 0);
// Now use the scanner to parse the first line and build the list of the tokens.
List <FactTokenInfo> tokens = new List <FactTokenInfo>();
FactTokenInfo lastToken = null;
FactTokenInfo currentToken = new FactTokenInfo();
int state = 0;
while (scanner.ScanTokenAndProvideInfoAboutIt(currentToken, ref state))
{
if ((null != lastToken) && (currentToken.StartIndex > lastToken.EndIndex + 1))
{
tokens.Clear();
}
tokens.Add(currentToken);
lastToken = currentToken;
currentToken = new FactTokenInfo();
}
return(tokens);
}
/// <summary>
/// Returns a string to be used for a tool tip based on the specified location.
/// </summary>
/// <param name="line">[in] The line in the source to look at for a tool tip.</param>
/// <param name="col">[in] An offset within the line to look at for a tool tip.</param>
/// <param name="span">A <see cref="T:Microsoft.VisualStudio.TextManager.Interop.TextSpan"></see>
/// that describes the area over which the cursor can hover before the tool tip is dismissed from view.</param>
/// <returns>
/// If successful, returns a string containing the text for the tool tip; otherwise, returns a null value.
/// </returns>
public override string GetDataTipText(int line, int col, out TextSpan span)
{
// new up the span
span = new TextSpan();
#if FACTEDITOR_TIPTEXT // Turn this off until it does something useful
// if the line isn't the first, just return null
if (line > 0)
{
return(null);
}
// get the view of the parse request
IVsTextView view = m_ParseRequest.View;
// get the token at the given column index
FactTokenInfo token = FactTokenHelper.GetTokenAtIndex(col, view, m_LanguageService);
if (token == null)
{
return(null);
}
// populate the span information
span.iStartLine = line;
span.iStartIndex = token.StartIndex;
span.iEndIndex = token.EndIndex + 1;
// if the token does not exist on the model create a document task
// (that is the squiggly line)
if (!token.ExistsOnModel)
{
//Source s = m_LanguageService.GetOrCreateSource(view);
//if (s != null)
//{
// DocumentTask task = s.CreateErrorTaskItem(span, MARKERTYPE.MARKER_SYNTAXERROR, String.Empty);
// task.CanDelete = true;
//}
}
// return the string to show as the tooltip
return(String.Format("{0} {1} exist on the model.", token.Value, (token.ExistsOnModel == true) ? "does" : "does not"));
#else // FACTEDITOR_TIPTEXT
return(null);
#endif // FACTEDITOR_TIPTEXT
}
/// <summary>
/// Scan the next token and fills in syntax coloring details about it in tokenInfo.
/// Implements <see cref="IScanner.ScanTokenAndProvideInfoAboutIt"/>
/// </summary>
/// <param name="tokenInfo">Keeps information about the token.</param>
/// <param name="state">Keeps track of scanner state. In: state after last token. Out: state after current token.</param>
/// <returns></returns>
private bool ScanTokenAndProvideInfoAboutIt(TokenInfo tokenInfo, ref int state)
{
bool foundToken = GetNextToken(m_Offset, tokenInfo, ref state);
if (foundToken)
{
m_Offset = tokenInfo.EndIndex + 1;
#if FACTEDITOR_TIPTEXT
if (tokenInfo is FactTokenInfo)
{
FactTokenInfo factToken = tokenInfo as FactTokenInfo;
factToken.Value = m_Line.Substring(factToken.StartIndex, factToken.Length);
factToken.ExistsOnModel = this.ObjectTypeExists(factToken.Value);
}
#endif // FACTEDITOR_TIPTEXT
}
return(foundToken);
}
/// <summary>
/// Gets a list of tokens from the IVsTextLines.
/// </summary>
/// <param name="lines">The IVsTextLines of the lines of source to parse.</param>
/// <param name="service">The language service.</param>
/// <returns>A list of tokens.</returns>
public static List<FactTokenInfo> GetTokens(IVsTextLines lines, FactEditorLanguageService service)
{
Source source = service.GetOrCreateSource(lines);
string lineText = source.GetLine(0);
// Get the scanner from the language service.
IScanner scanner = service.GetScanner(lines);
scanner.SetSource(lineText, 0);
// Now use the scanner to parse the first line and build the list of the tokens.
List<FactTokenInfo> tokens = new List<FactTokenInfo>();
FactTokenInfo lastToken = null;
FactTokenInfo currentToken = new FactTokenInfo();
int state = 0;
while (scanner.ScanTokenAndProvideInfoAboutIt(currentToken, ref state))
{
if ((null != lastToken) && (currentToken.StartIndex > lastToken.EndIndex + 1))
{
tokens.Clear();
}
tokens.Add(currentToken);
lastToken = currentToken;
currentToken = new FactTokenInfo();
}
return tokens;
}
