private void UpdateContent(TextChange change)
{
// Update the span's content
Content = change.ApplyChange(this);
ClearCachedStartPoints(Next);
}
private bool IsAcceptableIdentifierReplacement(Span target, TextChange change)
{
if (!change.IsReplace)
{
return(false);
}
foreach (ISymbol isymbol in target.Symbols)
{
CSharpSymbol symbol = isymbol as CSharpSymbol;
if (symbol == null)
{
break;
}
int symbolStartIndex = target.Start.AbsoluteIndex + symbol.Start.AbsoluteIndex;
int symbolEndIndex = symbolStartIndex + symbol.Content.Length;
// We're looking for the first symbol that contains the TextChange.
if (symbolEndIndex > change.OldPosition)
{
if (
symbolEndIndex >= change.OldPosition + change.OldLength &&
symbol.Type == CSharpSymbolType.Identifier
)
{
// The symbol we're changing happens to be an identifier. Need to check if its transformed state is also one.
// We do this transformation logic to capture the case that the new text change happens to not be an identifier;
// i.e. "5". Alone, it's numeric, within an identifier it's classified as identifier.
string transformedContent = change.ApplyChange(
symbol.Content,
symbolStartIndex
);
IEnumerable <ISymbol> newSymbols = Tokenizer(transformedContent);
if (newSymbols.Count() != 1)
{
// The transformed content resulted in more than one symbol; we can only replace a single identifier with
// another single identifier.
break;
}
CSharpSymbol newSymbol = (CSharpSymbol)newSymbols.First();
if (newSymbol.Type == CSharpSymbolType.Identifier)
{
return(true);
}
}
// Change is touching a non-identifier symbol or spans multiple symbols.
break;
}
}
return(false);
}
private PartialParseResult TryAcceptChange(Span target, TextChange change, PartialParseResult acceptResult = PartialParseResult.Accepted)
{
string content = change.ApplyChange(target);
if (StartsWithKeyword(content))
{
return(PartialParseResult.Rejected | PartialParseResult.SpanContextChanged);
}
return(acceptResult);
}
public void ApplyChangeWithReplacedTextReturnsNewContentWithChangeApplied()
{
// Arrange
var newBuffer = new StringTextBuffer("abcdefg");
var oldBuffer = new StringTextBuffer("");
var textChange = new TextChange(1, 1, oldBuffer, 2, newBuffer);
// Act
string text = textChange.ApplyChange("abcdefg", 1);
// Assert
Assert.Equal("bcbcdefg", text);
}
public void ApplyChangeWithInsertedTextReturnsNewContentWithChangeApplied()
{
// Arrange
var newBuffer = new StringTextBuffer("test");
var oldBuffer = new StringTextBuffer("");
var textChange = new TextChange(0, 0, oldBuffer, 3, newBuffer);
// Act
string text = textChange.ApplyChange("abcd", 0);
// Assert
Assert.Equal("tesabcd", text);
}
protected virtual SpanBuilder UpdateSpan(Span target, TextChange normalizedChange)
{
var newContent = normalizedChange.ApplyChange(target);
var newSpan = new SpanBuilder(target);
newSpan.ClearSymbols();
foreach (ISymbol sym in Tokenizer(newContent))
{
sym.OffsetStart(target.Start);
newSpan.Accept(sym);
}
if (target.Next != null)
{
var newEnd = SourceLocationTracker.CalculateNewLocation(target.Start, newContent);
target.Next.ChangeStart(newEnd);
}
return newSpan;
}
protected virtual SpanBuilder UpdateSpan(Span target, TextChange normalizedChange)
{
var newContent = normalizedChange.ApplyChange(target);
var newSpan = new SpanBuilder(target);
newSpan.ClearSymbols();
foreach (ISymbol sym in Tokenizer(newContent))
{
sym.OffsetStart(target.Start);
newSpan.Accept(sym);
}
if (target.Next != null)
{
var newEnd = SourceLocationTracker.CalculateNewLocation(target.Start, newContent);
target.Next.ChangeStart(newEnd);
}
return(newSpan);
}
private PartialParseResult TryAcceptChange(Span target, TextChange change, PartialParseResult acceptResult = PartialParseResult.Accepted)
{
var content = change.ApplyChange(target);
if (StartsWithKeyword(content))
{
return PartialParseResult.Rejected | PartialParseResult.SpanContextChanged;
}
return acceptResult;
}
public void ApplyChangeWithReplacedTextReturnsNewContentWithChangeApplied()
{
// Arrange
var newBuffer = new StringTextBuffer("abcdefg");
var oldBuffer = new StringTextBuffer("");
var textChange = new TextChange(1, 1, oldBuffer, 2, newBuffer);
// Act
var text = textChange.ApplyChange("abcdefg", 1);
// Assert
Assert.Equal("bcbcdefg", text);
}
public void ApplyChangeWithInsertedTextReturnsNewContentWithChangeApplied()
{
// Arrange
var newBuffer = new StringTextBuffer("test");
var oldBuffer = new StringTextBuffer("");
var textChange = new TextChange(0, 0, oldBuffer, 3, newBuffer);
// Act
var text = textChange.ApplyChange("abcd", 0);
// Assert
Assert.Equal("tesabcd", text);
}
