public override object TrackedVisitAssignmentExpression(AssignmentExpression assignmentExpression, object data)
{
// If we are in a property set region,
// this may be the statement where the field value is assigned.
if (this.associatedMember == null && // skip if already found to improve performance
this.currentContext == VisitorContext.PropertySetRegion &&
assignmentExpression.Op == AssignmentOperatorType.Assign && data != null)
{
// Resolve the expression.
if (!FileUtility.IsEqualFileName(this.FileName, this.memberToFind.DeclaringType.CompilationUnit.FileName))
{
throw new InvalidOperationException("The PropertyFieldAssociationVisitor does currently not support the case that the field is declared in a different file than the property.");
}
MemberResolveResult mrr = this.Resolve(assignmentExpression.Left) as MemberResolveResult;
if (mrr != null && mrr.ResolvedMember is IField && !((IField)mrr.ResolvedMember).IsLocalVariable)
{
PropertyDeclaration pd;
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertySetRegion, resolved field: " + mrr.ResolvedMember.ToString());
#endif
if (data as bool? ?? false)
{
// We are looking for this property.
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertySetRegion, this property seems to reference field " + mrr.ResolvedMember.ToString());
#endif
this.associatedMember = mrr.ResolvedMember;
}
else if ((pd = (data as PropertyDeclaration)) != null)
{
// We are looking for the field in this.memberToFind.
if (this.memberToFind.CompareTo(mrr.ResolvedMember) == 0)
{
// Resolve the property.
MemberResolveResult prr = NRefactoryAstCacheService.ResolveLowLevel(this.FileName, this.FileContent, pd.StartLocation.Y, pd.StartLocation.X + 1, null, pd.Name, ExpressionContext.Default) as MemberResolveResult;
if (prr != null)
{
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertySetRegion, resolved property: " + prr.ResolvedMember.ToString());
#endif
if (prr.ResolvedMember is IProperty)
{
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertySetRegion, property " + prr.ResolvedMember.ToString() + " seems to reference field " + mrr.ResolvedMember.ToString());
#endif
this.associatedMember = prr.ResolvedMember;
}
}
}
}
}
}
return(base.TrackedVisitAssignmentExpression(assignmentExpression, data));
}
/// <summary>
/// Resolves an expression in the current node's context.
/// </summary>
/// <param name="expression">The expression to be resolved.</param>
/// <param name="context">The ExpressionContext.</param>
public ResolveResult Resolve(Expression expression, ExpressionContext context)
{
if (!this.PositionAvailable)
{
LoggingService.Info("ResourceToolkit: PositionTrackingAstVisitor: Resolve failed due to position information being unavailable. Expression: " + expression.ToString());
return(null);
}
#if DEBUG
LoggingService.Debug("ResourceToolkit: PositionTrackingAstVisitor: Using this parent node for resolve: " + this.parentNodes.Peek().ToString());
#endif
return(NRefactoryAstCacheService.ResolveLowLevel(this.fileName, this.fileContent, this.CurrentNodeStartLocation.Y, this.CurrentNodeStartLocation.X + 1, this.compilationUnit, null, expression, context));
}
/// <summary>
/// Tries to determine the resource set which is referenced by the
/// resource manager which is assigned to the specified member.
/// </summary>
/// <param name="member">The referenced member to examine.</param>
/// <returns>
/// The ResourceSetReference, if successful, or a null reference, if the
/// specified member is not a resource manager or if the
/// resource file cannot be determined.
/// </returns>
static ResourceSetReference ResolveResourceSet(IMember member)
{
if (member != null && member.ReturnType != null &&
member.DeclaringType != null && member.DeclaringType.CompilationUnit != null)
{
ResourceSetReference rsr;
if (!NRefactoryAstCacheService.CacheEnabled || !cachedResourceSetReferenceMappings.TryGetValue(member, out rsr))
{
string declaringFileName = member.DeclaringType.CompilationUnit.FileName;
if (declaringFileName != null)
{
if (IsResourceManager(member.ReturnType, declaringFileName))
{
SupportedLanguage?language = NRefactoryResourceResolver.GetFileLanguage(declaringFileName);
if (language == null)
{
return(null);
}
CompilationUnit cu = NRefactoryAstCacheService.GetFullAst(language.Value, declaringFileName, ResourceResolverService.GetParsableFileContent(declaringFileName));
if (cu != null)
{
ResourceManagerInitializationFindVisitor visitor = new ResourceManagerInitializationFindVisitor(member);
cu.AcceptVisitor(visitor, null);
if (visitor.FoundResourceSet != null)
{
rsr = visitor.FoundResourceSet;
if (NRefactoryAstCacheService.CacheEnabled)
{
cachedResourceSetReferenceMappings.Add(member, rsr);
}
return(rsr);
}
}
}
}
return(null);
}
return(rsr);
}
return(null);
}
// ********************************************************************************************************************************
/// <summary>
/// Tries to resolve the resource reference using all available
/// NRefactory resource resolvers.
/// </summary>
static ResourceResolveResult TryResolve(ExpressionResult result, Expression expr, int caretLine, int caretColumn, string fileName, string fileContent, IExpressionFinder expressionFinder, char?charTyped)
{
ResolveResult rr = NRefactoryAstCacheService.ResolveLowLevel(fileName, fileContent, caretLine + 1, caretColumn + 1, null, result.Expression, expr, result.Context);
if (rr != null)
{
ResourceResolveResult rrr;
foreach (INRefactoryResourceResolver resolver in Resolvers)
{
if ((rrr = resolver.Resolve(result, expr, rr, caretLine, caretColumn, fileName, fileContent, expressionFinder, charTyped)) != null)
{
return(rrr);
}
}
}
return(null);
}
public override object TrackedVisitReturnStatement(ReturnStatement returnStatement, object data)
{
// If we are in a property get region,
// this may be the statement where the field value is returned.
if (this.associatedMember == null && // skip if already found to improve performance
this.currentContext == VisitorContext.PropertyGetRegion && data != null)
{
// Fix some type casting and parenthesized expressions
Expression expr = returnStatement.Expression;
while (true)
{
CastExpression ce = expr as CastExpression;
if (ce != null)
{
expr = ce.Expression;
continue;
}
ParenthesizedExpression pe = expr as ParenthesizedExpression;
if (pe != null)
{
expr = pe.Expression;
continue;
}
break;
}
// Resolve the expression.
if (!FileUtility.IsEqualFileName(this.FileName, this.memberToFind.DeclaringType.CompilationUnit.FileName))
{
throw new InvalidOperationException("The PropertyFieldAssociationVisitor does currently not support the case that the field is declared in a different file than the property.");
}
MemberResolveResult mrr = this.Resolve(expr) as MemberResolveResult;
if (mrr != null && mrr.ResolvedMember is IField)
{
PropertyDeclaration pd;
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertyGetRegion, resolved field: " + mrr.ResolvedMember.ToString());
#endif
if (data as bool? ?? false)
{
// We are looking for this property.
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertyGetRegion, this property seems to reference field " + mrr.ResolvedMember.ToString());
#endif
this.associatedMember = mrr.ResolvedMember;
}
else if ((pd = (data as PropertyDeclaration)) != null)
{
// We are looking for the field in this.memberToFind.
if (this.memberToFind.CompareTo(mrr.ResolvedMember) == 0)
{
// Resolve the property.
MemberResolveResult prr = NRefactoryAstCacheService.ResolveLowLevel(this.FileName, this.FileContent, pd.StartLocation.Y, pd.StartLocation.X + 1, null, pd.Name, ExpressionContext.Default) as MemberResolveResult;
if (prr != null)
{
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertyGetRegion, resolved property: " + prr.ResolvedMember.ToString());
#endif
if (prr.ResolvedMember is IProperty)
{
#if DEBUG
LoggingService.Debug("ResourceToolkit: PropertyFieldAssociationVisitor, inside PropertyGetRegion, property " + prr.ResolvedMember.ToString() + " seems to reference field " + mrr.ResolvedMember.ToString());
#endif
this.associatedMember = prr.ResolvedMember;
}
}
}
}
}
}
return(base.TrackedVisitReturnStatement(returnStatement, data));
}
// ********************************************************************************************************************************
/// <summary>
/// Attempts to resolve a reference to a resource.
/// </summary>
/// <param name="fileName">The name of the file that contains the expression to be resolved.</param>
/// <param name="document">The document that contains the expression to be resolved.</param>
/// <param name="caretLine">The 0-based line in the file that contains the expression to be resolved.</param>
/// <param name="caretColumn">The 0-based column position of the expression to be resolved.</param>
/// <param name="caretOffset">The offset of the position of the expression to be resolved.</param>
/// <param name="charTyped">The character that has been typed at the caret position but is not yet in the buffer (this is used when invoked from code completion), or <c>null</c>.</param>
/// <returns>A <see cref="ResourceResolveResult"/> that describes which resource is referenced by the expression at the specified position in the specified file, or <c>null</c> if that expression does not reference a (known) resource.</returns>
protected override ResourceResolveResult Resolve(string fileName, IDocument document, int caretLine, int caretColumn, int caretOffset, char?charTyped)
{
IExpressionFinder ef = ResourceResolverService.GetExpressionFinder(fileName);
if (ef == null)
{
return(null);
}
bool foundStringLiteral = false;
while (true)
{
ExpressionResult result = ef.FindFullExpression(document.Text, caretOffset);
if (result.Expression == null)
{
// Try to find an expression to the left, but only
// in the same line.
if (foundStringLiteral || --caretOffset < 0)
{
return(null);
}
var line = document.GetLineForOffset(caretOffset);
if (line.LineNumber - 1 != caretLine)
{
return(null);
}
continue;
}
if (!result.Region.IsEmpty)
{
caretLine = result.Region.BeginLine - 1;
caretColumn = result.Region.BeginColumn - 1;
}
PrimitiveExpression pe;
Expression expr = NRefactoryAstCacheService.ParseExpression(fileName, result.Expression, caretLine + 1, caretColumn + 1);
if (expr == null)
{
return(null);
}
else if ((pe = expr as PrimitiveExpression) != null)
{
if (pe.Value is string)
{
if (foundStringLiteral)
{
return(null);
}
// We are inside a string literal and need to find
// the next outer expression to decide
// whether it is a resource key.
if (!result.Region.IsEmpty)
{
// Go back to the start of the string literal - 2.
caretOffset = document.PositionToOffset(result.Region.BeginLine, result.Region.BeginColumn) - 2;
if (caretOffset < 0)
{
return(null);
}
}
else
{
LoggingService.Debug("ResourceToolkit: NRefactoryResourceResolver: Found string literal, but result region is empty. Trying to infer position from text.");
int newCaretOffset = document.GetText(0, Math.Min(document.TextLength, caretOffset + result.Expression.Length)).LastIndexOf(result.Expression);
if (newCaretOffset == -1)
{
LoggingService.Warn("ResourceToolkit: NRefactoryResourceResolver: Could not find resolved expression in text.");
--caretOffset;
continue;
}
else
{
caretOffset = newCaretOffset;
}
}
foundStringLiteral = true;
continue;
}
else
{
return(null);
}
}
return(TryResolve(result, expr, caretLine, caretColumn, fileName, document.Text, ef, charTyped));
}
}
/// <summary>
/// Tries to find a resource reference in the specified expression.
/// </summary>
/// <param name="expressionResult">The ExpressionResult for the expression.</param>
/// <param name="expr">The AST representation of the full expression.</param>
/// <param name="resolveResult">SharpDevelop's ResolveResult for the expression.</param>
/// <param name="caretLine">The 0-based line where the expression is located.</param>
/// <param name="caretColumn">The 0-based column where the expression is located.</param>
/// <param name="fileName">The name of the source file where the expression is located.</param>
/// <param name="fileContent">The content of the source file where the expression is located.</param>
/// <param name="expressionFinder">The ExpressionFinder for the file.</param>
/// <param name="charTyped">The character that has been typed at the caret position but is not yet in the buffer (this is used when invoked from code completion), or <c>null</c>.</param>
/// <returns>A ResourceResolveResult describing the referenced resource, or <c>null</c>, if this expression does not reference a resource using the standard .NET framework classes.</returns>
public ResourceResolveResult Resolve(ExpressionResult expressionResult, Expression expr, ResolveResult resolveResult, int caretLine, int caretColumn, string fileName, string fileContent, IExpressionFinder expressionFinder, char?charTyped)
{
/*
* We need to catch the following cases here:
*
* Something.GetString(
* Something.GetString("...")
* Something.ApplyResources(obj, "...")
* Something[
* Something["..."]
*
*/
if (charTyped == '(')
{
// Something.GetString
// This is a MethodResolveResult and we need the reference to "Something",
// which is the next outer expression.
// This is only valid when invoked from code completion
// and the method invocation character ('(' in C# and VB)
// has been typed.
// This code is also reused when reducing a complete InvocationExpression
// (MemberResolveResult) to the method reference by passing '(' as
// charTyped explicitly.
MethodGroupResolveResult methrr = resolveResult as MethodGroupResolveResult;
if (methrr != null)
{
if ((methrr.Name == "GetString" || methrr.Name == "GetObject" || methrr.Name == "GetStream" || methrr.Name == "ApplyResources") &&
(resolveResult = NRefactoryAstCacheService.ResolveNextOuterExpression(ref expressionResult, caretLine, caretColumn, fileName, fileContent, expressionFinder)) != null)
{
return(ResolveResource(resolveResult, expr));
}
else
{
return(null);
}
}
}
// Do not use "else if" here.
// '(' is also the IndexerExpressionStartToken for VB,
// so the "else" block further down might still apply.
if (charTyped == null)
{
// A MemberResolveResult with a complete expression
// must only be considered a valid resource reference
// when Resolve is not invoked from code completion
// (i.e. charTyped == null) because this indicates
// that the resource reference is already before the typed character
// and we are not interested in the following expression.
// This may happen when typing something like:
// Something.GetString("...")[
MemberResolveResult mrr = resolveResult as MemberResolveResult;
if (mrr != null)
{
if (mrr.ResolvedMember is IMethod &&
(mrr.ResolvedMember.Name == "GetString" || mrr.ResolvedMember.Name == "GetObject" || mrr.ResolvedMember.Name == "GetStream" || mrr.ResolvedMember.Name == "ApplyResources"))
{
// Something.GetString("...")
// This is a MemberResolveResult and we need the reference to "Something".
// The expression finder may only remove the string literal, so
// we have to call Resolve again in this case to resolve
// the method reference.
if ((resolveResult = NRefactoryAstCacheService.ResolveNextOuterExpression(ref expressionResult, caretLine, caretColumn, fileName, fileContent, expressionFinder)) != null)
{
if (resolveResult is MethodGroupResolveResult)
{
return(this.Resolve(expressionResult, expr, resolveResult, caretLine, caretColumn, fileName, fileContent, expressionFinder, '('));
}
else
{
return(ResolveResource(resolveResult, expr));
}
}
else
{
return(null);
}
}
else if (expr is IndexerExpression &&
IsResourceManager(mrr.ResolvedMember.DeclaringType.DefaultReturnType, fileName))
{
// Something["..."] is an IndexerExpression.
// We need the reference to Something and this is
// the next outer expression.
if ((resolveResult = NRefactoryAstCacheService.ResolveNextOuterExpression(ref expressionResult, caretLine, caretColumn, fileName, fileContent, expressionFinder)) != null)
{
return(ResolveResource(resolveResult, expr));
}
else
{
return(null);
}
}
}
}
else
{
// This request is triggered from code completion.
// The only case that has not been caught above is:
// Something[
// The reference to "Something" is already in this expression.
// So we have to test the trigger character against the
// indexer expression start token of the file's language.
LanguageProperties lp = NRefactoryResourceResolver.GetLanguagePropertiesForFile(fileName);
if (lp != null &&
!String.IsNullOrEmpty(lp.IndexerExpressionStartToken) &&
lp.IndexerExpressionStartToken[0] == charTyped)
{
#if DEBUG
LoggingService.Debug("ResourceToolkit: BclNRefactoryResourceResolver: Indexer expression start typed, ResolveResult: " + resolveResult.ToString());
LoggingService.Debug("ResourceToolkit: BclNRefactoryResourceResolver: -> Expression: " + expr.ToString());
#endif
return(ResolveResource(resolveResult, expr));
}
}
return(null);
}
