internal static TextSpan?GetDataTipSpan(IWpfTextView wpfTextView, TextSpan selection)
{
// Adjust the span to expression boundaries.
var snapshot = wpfTextView.TextSnapshot;
var start = LineAndColumnNumberToSnapshotPoint(snapshot, selection.iStartLine, selection.iStartIndex);
var end = LineAndColumnNumberToSnapshotPoint(snapshot, selection.iEndLine, selection.iEndIndex);
// If this is a zero-length span (which it usually is, unless there's selection), adjust it
// to cover one char to the right, since an empty span at the beginning of the expression does
// not count as belonging to that expression;
if (start == end && start.Position != snapshot.Length)
{
end += 1;
}
var snapshotSpan = new SnapshotSpan(start, end);
var trackingSpan = snapshot.CreateTrackingSpan(snapshotSpan.Span, SpanTrackingMode.EdgeExclusive);
var rep = new ReverseExpressionParser(snapshot, wpfTextView.TextBuffer, trackingSpan);
var exprSpan = rep.GetExpressionRange(forCompletion: false);
if (exprSpan == null)
{
return(null);
}
// Check whether this is an expression with side effects - if it does, we don't want to show a data tip for it.
string text = exprSpan.Value.GetText();
var ast = new JSParser(text).Parse(new CodeSettings());
var sideEffectsDetectingVisitor = new SideEffectsDetectingVisitor();
ast.Walk(sideEffectsDetectingVisitor);
if (sideEffectsDetectingVisitor.HasSideEffects)
{
return(null);
}
TextSpan dataTipSpan;
SnapshotPointToLineAndColumnNumber(exprSpan.Value.Start, out dataTipSpan.iStartLine, out dataTipSpan.iStartIndex);
SnapshotPointToLineAndColumnNumber(exprSpan.Value.End, out dataTipSpan.iEndLine, out dataTipSpan.iEndIndex);
return(dataTipSpan);
}
internal static TextSpan? GetDataTipSpan(IWpfTextView wpfTextView, TextSpan selection) {
// Adjust the span to expression boundaries.
var snapshot = wpfTextView.TextSnapshot;
var start = LineAndColumnNumberToSnapshotPoint(snapshot, selection.iStartLine, selection.iStartIndex);
var end = LineAndColumnNumberToSnapshotPoint(snapshot, selection.iEndLine, selection.iEndIndex);
// If this is a zero-length span (which it usually is, unless there's selection), adjust it
// to cover one char to the right, since an empty span at the beginning of the expression does
// not count as belonging to that expression;
if (start == end && start.Position != snapshot.Length) {
end += 1;
}
var snapshotSpan = new SnapshotSpan(start, end);
var trackingSpan = snapshot.CreateTrackingSpan(snapshotSpan.Span, SpanTrackingMode.EdgeExclusive);
var rep = new ReverseExpressionParser(snapshot, wpfTextView.TextBuffer, trackingSpan);
var exprSpan = rep.GetExpressionRange(forCompletion: false);
if (exprSpan == null) {
return null;
}
// Check whether this is an expression with side effects - if it does, we don't want to show a data tip for it.
string text = exprSpan.Value.GetText();
var ast = new JSParser(text).Parse(new CodeSettings());
var sideEffectsDetectingVisitor = new SideEffectsDetectingVisitor();
ast.Walk(sideEffectsDetectingVisitor);
if (sideEffectsDetectingVisitor.HasSideEffects) {
return null;
}
TextSpan dataTipSpan;
SnapshotPointToLineAndColumnNumber(exprSpan.Value.Start, out dataTipSpan.iStartLine, out dataTipSpan.iStartIndex);
SnapshotPointToLineAndColumnNumber(exprSpan.Value.End, out dataTipSpan.iEndLine, out dataTipSpan.iEndIndex);
return dataTipSpan;
}