public override Declarations GetDeclarations(IVsTextView view, int line, int col, TokenInfo info, ParseReason reason)
{
// Check that the text view is not null.
if (null == view)
{
throw new ArgumentNullException("view");
}
// In order to get the correct text for this line we have to figure out if this line
// contains part of the read-only region of the buffer because this region is not
// supposed to be used (it is the output of the engine).
// Use the function exposed by the console window to get the text of the line
// without the part inside the read-only region.
string lineText = PythonConsole.TextOfLine(line, col, true);
if (null == lineText)
{
// there is no text to parse, so there is no delaration to return.
// Return an empty Declarations object.
return new MethodDeclarations();
}
// Get the text buffer.
IVsTextLines buffer;
Microsoft.VisualStudio.ErrorHandler.ThrowOnFailure(
view.GetBuffer(out buffer));
// Get the scanner from the language service.
IScanner scanner = Language.GetScanner(buffer);
scanner.SetSource(lineText, 0);
// Now use the scanner to parse this line and build the list of the tokens.
List<TokenInfo> tokens = new List<TokenInfo>();
TokenInfo lastToken = null;
TokenInfo currentToken = new TokenInfo();
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 TokenInfo();
}
// Now that we have the tokens we can use them to find the text to pass to the
// IronPython engine to evaluate the expression.
if (0 == tokens.Count)
{
// If the list of tokens is empty, then return an emty set of declarations.
return new MethodDeclarations();
}
// Check if the last token is the one that generated the parse request.
if (tokens[tokens.Count - 1].Trigger == TokenTriggers.None)
{
tokens.RemoveAt(tokens.Count - 1);
if (0 == tokens.Count)
{
return new MethodDeclarations();
}
}
// Remove the token that generated the request
if (tokens[tokens.Count - 1].Trigger != TokenTriggers.None)
{
tokens.RemoveAt(tokens.Count - 1);
if (0 == tokens.Count)
{
return new MethodDeclarations();
}
}
// Now build the string to pass to the engine.
int startIndex = tokens[0].StartIndex;
int len = tokens[tokens.Count - 1].EndIndex - startIndex + 1;
string engineCommand = string.Format(
System.Globalization.CultureInfo.InvariantCulture,
"dir({0})",
lineText.Substring(startIndex, len));
MethodDeclarations declarations = new MethodDeclarations();
try
{
IEnumerable members = Engine.Evaluate(engineCommand) as IEnumerable;
if (null != members)
{
foreach (string member in members)
{
declarations.AddMethod(member);
}
}
}
catch (Exception)
{
// Do nothing
}
return declarations;
}
public override Declarations GetDeclarations(IVsTextView view, int line, int col, TokenInfo info, ParseReason reason)
{
// Check that the text view is not null.
if (null == view)
{
throw new ArgumentNullException("view");
}
// In order to get the correct text for this line we have to figure out if this line
// contains part of the read-only region of the buffer because this region is not
// supposed to be used (it is the output of the engine).
// Use the function exposed by the console window to get the text of the line
// without the part inside the read-only region.
string lineText = PythonConsole.TextOfLine(line, col, true);
if (null == lineText)
{
// there is no text to parse, so there is no delaration to return.
// Return an empty Declarations object.
return(new MethodDeclarations());
}
// Get the text buffer.
IVsTextLines buffer;
Microsoft.VisualStudio.ErrorHandler.ThrowOnFailure(
view.GetBuffer(out buffer));
// Get the scanner from the language service.
IScanner scanner = Language.GetScanner(buffer);
scanner.SetSource(lineText, 0);
// Now use the scanner to parse this line and build the list of the tokens.
List <TokenInfo> tokens = new List <TokenInfo>();
TokenInfo lastToken = null;
TokenInfo currentToken = new TokenInfo();
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 TokenInfo();
}
// Now that we have the tokens we can use them to find the text to pass to the
// IronPython engine to evaluate the expression.
if (0 == tokens.Count)
{
// If the list of tokens is empty, then return an emty set of declarations.
return(new MethodDeclarations());
}
// Check if the last token is the one that generated the parse request.
if (tokens[tokens.Count - 1].Trigger == TokenTriggers.None)
{
tokens.RemoveAt(tokens.Count - 1);
if (0 == tokens.Count)
{
return(new MethodDeclarations());
}
}
// Remove the token that generated the request
if (tokens[tokens.Count - 1].Trigger != TokenTriggers.None)
{
tokens.RemoveAt(tokens.Count - 1);
if (0 == tokens.Count)
{
return(new MethodDeclarations());
}
}
// Now build the string to pass to the engine.
int startIndex = tokens[0].StartIndex;
int len = tokens[tokens.Count - 1].EndIndex - startIndex + 1;
string engineCommand = string.Format(
System.Globalization.CultureInfo.InvariantCulture,
"dir({0})",
lineText.Substring(startIndex, len));
MethodDeclarations declarations = new MethodDeclarations();
try
{
IEnumerable members = Engine.Evaluate(engineCommand) as IEnumerable;
if (null != members)
{
foreach (string member in members)
{
declarations.AddMethod(member);
}
}
}
catch (Exception)
{
// Do nothing
}
return(declarations);
}
