private NativeMethods.FindSourceDefinitionsAndDetermineSymbolResult GetNode(SnapshotPoint point, Project project, string fileName)
{
Compiler compiler;
try {
compiler = compilerHost.Value.CreateCompiler(project);
} catch (COMException) { return(null); } // Don't choke on metadata as source
var sourceFile = compiler.SourceFiles[new FileName(fileName)];
var node = sourceFile.GetParseTree().FindLeafNode(CSharpLanguageUtilities.ToPosition(point));
if (node == null)
{
return(null);
}
var rNode = ParseTreeMatch.GetReferencedNode(node);
if (rNode == null)
{
return(null);
}
return(NativeMethods.FindSourceDefinitionsAndDetermineSymbolFromParseTree((IDECompilation)compiler.GetCompilation(), null, rNode));
}
// Stolen from Microsoft.VisualStudio.CSharp.Services.Language.Features.Peek.PeekableItemSource
static IEnumerable <GoToDefLocation> GetGoToDefLocations(string sourceFileName, SnapshotPoint point)
{
// I cannot use Position, because it will be compiled into a
// a field in the iterator type, which will throw a TypeLoad
// exception before I add my AssemblyResolve handler.
var position = CSharpLanguageUtilities.ToPositionTuple(point, null);
string[] fileNames, rqNames, assemblyBinaryNames;
int[] lines, columns;
bool[] isMetaDataFlags;
try {
NativeMethods.GoToDefinition_GetLocations(position.Item1, position.Item2, sourceFileName, out fileNames, out lines, out columns, out rqNames, out assemblyBinaryNames, out isMetaDataFlags);
} catch (InvalidOperationException) {
yield break;
}
if (fileNames == null || lines == null || columns == null || rqNames == null || assemblyBinaryNames == null)
{
yield break;
}
if (fileNames.Length != lines.Length || lines.Length != columns.Length || columns.Length != rqNames.Length || rqNames.Length != assemblyBinaryNames.Length)
{
throw new InvalidOperationException("GoToDefinition_GetLocations returned inconsistent arrays");
}
for (int i = 0; i < fileNames.Length; i++)
{
yield return(new GoToDefLocation(fileNames[i], rqNames[i], assemblyBinaryNames[i], isMetaDataFlags[i]));
}
}