/// <summary>
/// Reparses the code of the current scope and returns the object (either IExpression or ITypeDeclaration derivative)
/// that is beneath the caret location.
///
/// Used for code completion/symbol resolution.
/// Mind the extra options that might be passed via the Options parameter.
/// </summary>
/// <param name="ctxt">Can be null</param>
public static ISyntaxRegion GetScopedCodeObject(IEditorData editor,
ResolverContextStack ctxt = null,
AstReparseOptions Options = 0)
{
if (ctxt == null)
{
ctxt = ResolverContextStack.Create(editor);
}
var code = editor.ModuleCode;
int start = 0;
var startLocation = CodeLocation.Empty;
bool IsExpression = false;
if (ctxt.CurrentContext.ScopedStatement is IExpressionContainingStatement)
{
var exprs = ((IExpressionContainingStatement)ctxt.CurrentContext.ScopedStatement).SubExpressions;
IExpression targetExpr = null;
if (exprs != null)
{
foreach (var ex in exprs)
{
if ((targetExpr = ExpressionHelper.SearchExpressionDeeply(ex, editor.CaretLocation, true))
!= ex)
{
break;
}
}
}
if (targetExpr != null && editor.CaretLocation >= targetExpr.Location && editor.CaretLocation <= targetExpr.EndLocation)
{
startLocation = targetExpr.Location;
start = DocumentHelper.LocationToOffset(editor.ModuleCode, startLocation);
IsExpression = true;
}
}
if (!IsExpression)
{
// First check if caret is inside a comment/string etc.
int lastStart = -1;
int lastEnd = -1;
var caretContext = CaretContextAnalyzer.GetTokenContext(code, editor.CaretOffset, out lastStart, out lastEnd);
// Return if comment etc. found
if (caretContext != TokenContext.None)
{
return(null);
}
start = CaretContextAnalyzer.SearchExpressionStart(code, editor.CaretOffset - 1,
(lastEnd > 0 && lastEnd < editor.CaretOffset) ? lastEnd : 0);
startLocation = DocumentHelper.OffsetToLocation(editor.ModuleCode, start);
}
if (start < 0 || editor.CaretOffset <= start)
{
return(null);
}
var expressionCode = code.Substring(start, Options.HasFlag(AstReparseOptions.AlsoParseBeyondCaret) ? code.Length - start : editor.CaretOffset - start);
var parser = DParser.Create(new StringReader(expressionCode));
parser.Lexer.SetInitialLocation(startLocation);
parser.Step();
if (!IsExpression && Options.HasFlag(AstReparseOptions.OnlyAssumeIdentifierList) && parser.Lexer.LookAhead.Kind == DTokens.Identifier)
{
return(parser.IdentifierList());
}
else if (IsExpression || parser.IsAssignExpression())
{
if (Options.HasFlag(AstReparseOptions.ReturnRawParsedExpression))
{
return(parser.AssignExpression());
}
else
{
return(ExpressionHelper.SearchExpressionDeeply(parser.AssignExpression(), editor.CaretLocation, Options.HasFlag(AstReparseOptions.WatchForParamExpressions)));
}
}
else
{
return(parser.Type());
}
}
/// <summary>
/// Reparses the code of the current scope and returns the object (either IExpression or ITypeDeclaration derivative)
/// that is beneath the caret location.
///
/// Used for code completion/symbol resolution.
/// Mind the extra options that might be passed via the Options parameter.
/// </summary>
/// <param name="ctxt">Can be null</param>
public static ISyntaxRegion GetScopedCodeObject(IEditorData editor,
AstReparseOptions Options = AstReparseOptions.AlsoParseBeyondCaret,
ResolutionContext ctxt = null)
{
if (ctxt == null)
{
ctxt = ResolutionContext.Create(editor);
}
var code = editor.ModuleCode;
int start = 0;
var startLocation = CodeLocation.Empty;
bool IsExpression = false;
if (ctxt.CurrentContext.ScopedStatement is IExpressionContainingStatement)
{
var exprs = ((IExpressionContainingStatement)ctxt.CurrentContext.ScopedStatement).SubExpressions;
IExpression targetExpr = null;
if (exprs != null)
{
foreach (var ex in exprs)
{
if ((targetExpr = ExpressionHelper.SearchExpressionDeeply(ex, editor.CaretLocation))
!= ex)
{
break;
}
}
}
if (targetExpr != null && editor.CaretLocation >= targetExpr.Location && editor.CaretLocation <= targetExpr.EndLocation)
{
startLocation = targetExpr.Location;
start = DocumentHelper.GetOffsetByRelativeLocation(editor.ModuleCode, editor.CaretLocation, editor.CaretOffset, startLocation);
IsExpression = true;
}
}
if (!IsExpression)
{
// First check if caret is inside a comment/string etc.
int lastStart = 0;
int lastEnd = 0;
if ((Options & AstReparseOptions.DontCheckForCommentsOrStringSurrounding) == 0)
{
var caretContext = CaretContextAnalyzer.GetTokenContext(code, editor.CaretOffset, out lastStart, out lastEnd);
// Return if comment etc. found
if (caretContext != TokenContext.None)
{
return(null);
}
}
// Could be somewhere in an ITypeDeclaration..
if (editor.CaretOffset < 0 || editor.CaretOffset >= code.Length)
{
return(null);
}
if (Lexer.IsIdentifierPart(code[editor.CaretOffset]))
{
start = editor.CaretOffset;
}
else if (editor.CaretOffset > 0 && Lexer.IsIdentifierPart(code[editor.CaretOffset - 1]))
{
start = editor.CaretOffset - 1;
}
start = CaretContextAnalyzer.SearchExpressionStart(code, start,
(lastEnd > 0 && lastEnd < editor.CaretOffset) ? lastEnd : 0);
startLocation = DocumentHelper.OffsetToLocation(editor.ModuleCode, start);
}
if (start < 0 || editor.CaretOffset < start)
{
return(null);
}
var sv = new StringView(code, start, Options.HasFlag(AstReparseOptions.AlsoParseBeyondCaret) ? code.Length - start : editor.CaretOffset - start);
var parser = DParser.Create(sv);
parser.Lexer.SetInitialLocation(startLocation);
parser.Step();
ITypeDeclaration td;
if (!IsExpression && Options.HasFlag(AstReparseOptions.OnlyAssumeIdentifierList) && parser.Lexer.LookAhead.Kind == DTokens.Identifier)
{
td = parser.IdentifierList();
}
else if (IsExpression || parser.IsAssignExpression())
{
if (Options.HasFlag(AstReparseOptions.ReturnRawParsedExpression))
{
return(parser.AssignExpression());
}
else
{
return(ExpressionHelper.SearchExpressionDeeply(parser.AssignExpression(), editor.CaretLocation));
}
}
else
{
td = parser.Type();
}
if (Options.HasFlag(AstReparseOptions.ReturnRawParsedExpression))
{
return(td);
}
while (td != null && td.InnerDeclaration != null && editor.CaretLocation <= td.InnerDeclaration.EndLocation)
{
td = td.InnerDeclaration;
}
return(td);
}