public async Task <Span> GetBreakpointSpanAsync(ITextBuffer buffer, int position, CancellationToken cancellationToken)
{
var document = buffer.AsTextContainer().GetOpenDocumentInCurrentContext();
var tree = await document.GetSyntaxTreeAsync(cancellationToken);
BreakpointSpans.TryGetBreakpointSpan(tree, position, cancellationToken, out var span);
return(new Span(span.Start, span.Length));
}
public async Task <Span> GetBreakpointSpanAsync(ITextBuffer buffer, int position, CancellationToken cancellationToken)
{
var document = buffer.AsTextContainer()?.GetOpenDocumentInCurrentContext();
var tree = document != null ? await document.GetSyntaxTreeAsync(cancellationToken) : null;
if (tree != null && BreakpointSpans.TryGetBreakpointSpan(tree, Math.Max(0, Math.Min(position, tree.Length - 1)), cancellationToken, out var span))
{
return(new Span(span.Start, span.Length));
}
return(buffer.CurrentSnapshot.GetLineFromPosition(Math.Max(0, Math.Min(position, buffer.CurrentSnapshot.Length - 1))).Extent.Span);
}
public static bool TryGetBreakpointSpan(
SyntaxTree tree,
int position,
CancellationToken cancellationToken,
out TextSpan breakpointSpan
) =>
BreakpointSpans.TryGetBreakpointSpan(
tree,
position,
cancellationToken,
out breakpointSpan
);
internal static async Task <BreakpointResolutionResult> GetBreakpointAsync(Document document, int position, CancellationToken cancellationToken)
{
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (!BreakpointSpans.TryGetBreakpointSpan(tree, position, cancellationToken, out var span))
{
return(null);
}
if (span.Length == 0)
{
return(BreakpointResolutionResult.CreateLineResult(document));
}
return(BreakpointResolutionResult.CreateSpanResult(document, span));
}
/// <summary>
/// Returns null if a breakpoint can't be placed at the specified position.
/// </summary>
public async Task <BreakpointResolutionResult?> ResolveBreakpointAsync(Document document, TextSpan textSpan, CancellationToken cancellationToken)
{
try
{
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (tree == null || !BreakpointSpans.TryGetBreakpointSpan(tree, textSpan.Start, cancellationToken, out var span))
{
return(null);
}
if (span.Length == 0)
{
return(BreakpointResolutionResult.CreateLineResult(document));
}
return(BreakpointResolutionResult.CreateSpanResult(document, span));
}
catch (Exception e) when(FatalError.ReportAndCatchUnlessCanceled(e, cancellationToken))
{
return(null);
}
}