/// <summary>
/// Allows to get parts of code surrounded by #region directives
/// </summary>
/// <param name="root">Root of the document syntax tree</param>
/// <returns>List of processed nodes</returns>
public List <DirectiveSyntaxNode> GetRegionNodes(SyntaxNode root)
{
var regionDirectives = new List <SyntaxTrivia>();
var endRegionDirectives = new List <SyntaxTrivia>();
var directiveNodes = new List <DirectiveSyntaxNode>();
// find all #region directives
foreach (var regionDirective in root.DescendantTrivia().Where(i => i.Kind() == SyntaxKind.RegionDirectiveTrivia))
{
regionDirectives.Add(regionDirective);
}
// find all #endregion directives
foreach (var endRegionDirective in root.DescendantTrivia().Where(j => j.Kind() == SyntaxKind.EndRegionDirectiveTrivia))
{
endRegionDirectives.Add(endRegionDirective);
}
// just in case: order by position in the document to allow further processing
regionDirectives = regionDirectives
.OrderBy(d => d.SpanStart)
.ToList();
endRegionDirectives = endRegionDirectives
.OrderBy(d => d.SpanStart)
.ToList();
foreach (var regionDirective in regionDirectives)
{
var directiveNode = new DirectiveSyntaxNode {
RegionDirective = regionDirective
};
// find #endregion directive for the corresponding #region
foreach (var endRegionDirective in endRegionDirectives)
{
// skip #endregion if it is earlier than #region
if (endRegionDirective.SpanStart < regionDirective.SpanStart)
{
continue;
}
// check for inner pairs of #region/#endregion directives
if (regionDirectives.Exists(d => d.SpanStart > regionDirective.SpanStart && d.SpanStart < endRegionDirective.SpanStart) &&
!endRegionDirectives.Exists(d => d.SpanStart > regionDirective.SpanStart && d.SpanStart < endRegionDirective.SpanStart))
{
continue;
}
directiveNode.EndRegionDirective = endRegionDirective;
// add nodes that are placed between #region and #endregion directives
var descendantNodes = root.DescendantNodes()
.Where(t => (t is MemberDeclarationSyntax || t is StatementSyntax) &&
t.SpanStart > regionDirective.SpanStart &&
t.SpanStart < endRegionDirective.SpanStart)
.ToList();
directiveNode.AddNodes(descendantNodes);
directiveNodes.Add(directiveNode);
break;
}
}
return(directiveNodes);
}
