public async Task <IEnumerable <TextChange> > GetTextChangesAsync(Document oldDocument, Document newDocument, CancellationToken cancellationToken)
{
var oldText = await oldDocument.GetTextAsync(cancellationToken).ConfigureAwait(false);
var newText = await newDocument.GetTextAsync(cancellationToken).ConfigureAwait(false);
var diffService = _differenceSelectorService.GetTextDifferencingService(oldDocument.Project.LanguageServices.GetService <IContentTypeLanguageService>().GetDefaultContentType())
?? _differenceSelectorService.DefaultTextDifferencingService;
var differenceOptions = new StringDifferenceOptions()
{
DifferenceType = StringDifferenceTypes.Word
};
var oldTextSnapshot = oldText.FindCorrespondingEditorTextSnapshot();
var newTextSnapshot = newText.FindCorrespondingEditorTextSnapshot();
var useSnapshots = oldTextSnapshot != null && newTextSnapshot != null;
var diffResult = useSnapshots
? diffService.DiffSnapshotSpans(oldTextSnapshot.GetFullSpan(), newTextSnapshot.GetFullSpan(), differenceOptions)
: diffService.DiffStrings(oldText.ToString(), newText.ToString(), differenceOptions);
return(diffResult.Differences.Select(d =>
new TextChange(
diffResult.LeftDecomposition.GetSpanInOriginal(d.Left).ToTextSpan(),
newText.GetSubText(diffResult.RightDecomposition.GetSpanInOriginal(d.Right).ToTextSpan()).ToString())));
}
private IHierarchicalDifferenceCollection DiffStrings(string leftTextWithReplacement, string rightTextWithReplacement)
{
var diffService = _differenceSelectorService.GetTextDifferencingService(
_workspace.Services.GetLanguageServices(this.Project.Language).GetService <IContentTypeLanguageService>().GetDefaultContentType());
diffService = diffService ?? _differenceSelectorService.DefaultTextDifferencingService;
return(diffService.DiffStrings(leftTextWithReplacement, rightTextWithReplacement, s_venusEditOptions.DifferenceOptions));
}
private IHierarchicalDifferenceCollection DiffStrings(string leftTextWithReplacement, string rightTextWithReplacement)
{
var document = LanguageBuffer.CurrentSnapshot.GetOpenDocumentInCurrentContextWithChangesSafe();
var diffService = _differenceSelectorService.GetTextDifferencingService(
_workspace.Services.GetLanguageServices(document.Project.Language).GetService <IContentTypeLanguageService> ().GetDefaultContentType());
diffService = diffService ?? _differenceSelectorService.DefaultTextDifferencingService;
return(diffService.DiffStrings(leftTextWithReplacement, rightTextWithReplacement, s_venusEditOptions.DifferenceOptions));
}
private IHierarchicalDifferenceCollection ComputeEditDifferences(TextDocument oldDocument, TextDocument newDocument, CancellationToken cancellationToken)
{
// Get the text that's actually in the editor.
var oldText = oldDocument.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var newText = newDocument.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
// Defer to the editor to figure out what changes the client made.
var diffService = _differenceSelectorService.GetTextDifferencingService(
oldDocument.Project.LanguageServices.GetService <IContentTypeLanguageService>().GetDefaultContentType());
diffService = diffService ?? _differenceSelectorService.DefaultTextDifferencingService;
return(diffService.DiffStrings(oldText.ToString(), newText.ToString(), new StringDifferenceOptions()
{
DifferenceType = StringDifferenceTypes.Word | StringDifferenceTypes.Line,
}));
}