public async Task<Document> RemoveUnnecessaryRegions(DocumentConditionalRegionInfo info, CancellationToken cancellationToken = default(CancellationToken))
{
if (info == null)
{
throw new ArgumentNullException("info");
}
var changes = CalculateTextChanges(info.Chains);
if (changes == null || changes.Count == 0)
{
return info.Document;
}
var newText = await info.Document.GetTextAsync(cancellationToken);
try
{
newText = newText.WithChanges(changes);
}
catch (Exception)
{
var changesString = new StringBuilder();
var syntaxTree = info.Document.GetSyntaxTreeAsync(cancellationToken).Result;
foreach (var change in changes)
{
var lineSpan = Location.Create(syntaxTree, change.Span).GetLineSpan();
changesString.AppendFormat("({0}-{1}): {2}", lineSpan.StartLinePosition.Line, lineSpan.EndLinePosition.Line, newText.GetSubText(change.Span).ToString());
}
Logger.WriteErrorLine(string.Format("Failed to remove regions from document '{0}':{1}{2}", info.Document.FilePath, Environment.NewLine, changesString.ToString()));
return info.Document;
}
return info.Document.WithText(newText);
}
private static async Task OnDocumentAnalyzed(AnalysisEngine engine, Options options, DocumentConditionalRegionInfo info, CancellationToken cancellationToken)
{
if (options.Edit)
{
var fileInfo = new FileInfo(info.Document.FilePath);
if (fileInfo.IsReadOnly || !fileInfo.Exists)
{
Console.WriteLine("warning: skipping document '{0}' because it {1}.",
info.Document.FilePath, fileInfo.IsReadOnly ? "is read-only" : "does not exist");
return;
}
var document = await engine.RemoveUnnecessaryRegions(info, cancellationToken);
document = await engine.SimplifyVaryingPreprocessorExpressions(document, cancellationToken);
var text = await document.GetTextAsync(cancellationToken);
using (var file = File.Open(document.FilePath, FileMode.Truncate, FileAccess.Write))
{
var writer = new StreamWriter(file, text.Encoding);
text.Write(writer, cancellationToken);
await writer.FlushAsync();
}
}
}
private async Task<DocumentConditionalRegionInfo> GetConditionalRegionInfo(Document document, CancellationToken cancellationToken)
{
var chains = await GetConditionalRegionChains(document, cancellationToken);
var info = new DocumentConditionalRegionInfo(document, chains);
if (DocumentAnalyzed != null)
{
await DocumentAnalyzed(this, info, cancellationToken);
}
return info;
}
private static async Task OnDocumentAnalyzed(AnalysisEngine engine, Options options, DocumentConditionalRegionInfo info, CancellationToken cancellationToken)
{
if (options.Edit)
{
var fileInfo = new FileInfo(info.Document.FilePath);
if (fileInfo.IsReadOnly || !fileInfo.Exists)
{
Console.WriteLine("warning: skipping document '{0}' because it {1}.",
info.Document.FilePath, fileInfo.IsReadOnly ? "is read-only" : "does not exist");
return;
}
var document = await engine.RemoveUnnecessaryRegions(info, cancellationToken);
document = await engine.SimplifyVaryingPreprocessorExpressions(document, cancellationToken);
var text = await document.GetTextAsync(cancellationToken);
using (var file = File.Open(document.FilePath, FileMode.Truncate, FileAccess.Write))
{
var writer = new StreamWriter(file, text.Encoding);
text.Write(writer, cancellationToken);
await writer.FlushAsync();
}
}
}
