private void UpdateBuffer(TextDocument document, SpanChange spanSource, out SourceTextContainer container, out TextDocument documentBackedByTextBuffer)
{
if (_previewWorkspace != null)
{
var currentDocument = _previewWorkspace.CurrentSolution.GetTextDocument(_currentDocument);
var currentDocumentText = currentDocument.GetTextAsync().Result;
_previewWorkspace.CloseDocument(currentDocument, currentDocumentText);
// Put the new document into the current preview solution.
var updatedSolution = _previewWorkspace.CurrentSolution.WithTextDocumentText(document.Id, document.GetTextAsync().Result);
var updatedDocument = updatedSolution.GetTextDocument(document.Id);
ApplyDocumentToBuffer(updatedDocument, spanSource, out container, out documentBackedByTextBuffer);
_previewWorkspace.TryApplyChanges(documentBackedByTextBuffer.Project.Solution);
_previewWorkspace.OpenDocument(document.Id);
_currentDocument = document.Id;
}
else
{
_currentDocument = document.Id;
ApplyDocumentToBuffer(document, spanSource, out container, out documentBackedByTextBuffer);
_previewWorkspace = new PreviewDialogWorkspace(documentBackedByTextBuffer.Project.Solution);
_previewWorkspace.OpenDocument(document.Id);
}
}
private void UpdateBuffer(Document document, SpanChange spanSource, out SourceTextContainer container, out Document documentBackedByTextBuffer)
{
if (_previewWorkspace != null)
{
_previewWorkspace.CloseDocument(_currentDocument, _previewWorkspace.CurrentSolution.GetDocument(_currentDocument).GetTextAsync().Result);
// Put the new document into the current preview solution
var updatedSolution = _previewWorkspace.CurrentSolution.WithDocumentText(document.Id, document.GetTextAsync().Result);
var updatedDocument = updatedSolution.GetDocument(document.Id);
ApplyDocumentToBuffer(updatedDocument, spanSource, out container, out documentBackedByTextBuffer);
_previewWorkspace.TryApplyChanges(documentBackedByTextBuffer.Project.Solution);
_previewWorkspace.OpenDocument(document.Id);
_currentDocument = document.Id;
}
else
{
_currentDocument = document.Id;
ApplyDocumentToBuffer(document, spanSource, out container, out documentBackedByTextBuffer);
_previewWorkspace = new PreviewDialogWorkspace(documentBackedByTextBuffer.Project.Solution);
_previewWorkspace.OpenDocument(document.Id);
}
}
private ChangeList GetEntireDocumentAsSpanChange(TextDocument document)
{
// Show the whole document.
var entireSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(0, _buffer.CurrentSnapshot.Length, SpanTrackingMode.EdgeInclusive);
var text = document.GetTextAsync().Result.ToString();
var displayText = GetDisplayText(text);
var entireSpanChild = new SpanChange(entireSpan, _buffer, document.Id, displayText, text, text, isDeletion: false, parent: this, engine: engine);
return(new ChangeList(new[] { entireSpanChild }));
}
public void UpdatePreview(DocumentId documentId, SpanChange spanSource)
{
var updatedSolution = _topLevelChange.GetUpdatedSolution(applyingChanges: false);
var document = updatedSolution.GetTextDocument(documentId);
if (document != null)
{
_updater.UpdateView(document, spanSource);
}
}
public void UpdateView(TextDocument document, SpanChange spanSource)
{
UpdateBuffer(document);
// Picking a different span: no text change; update span anyway.
_tagger.Span = spanSource.GetSpan();
var spanInBuffer = new SnapshotSpan(_textView.TextBuffer.CurrentSnapshot, new Span(_tagger.Span.Start, 0));
_textView.ViewScroller.EnsureSpanVisible(spanInBuffer, EnsureSpanVisibleOptions.None);
}
private ChangeList ComputeChildren(TextDocument left, TextDocument right, CancellationToken cancellationToken)
{
if (left == null)
{
// Added document.
return(GetEntireDocumentAsSpanChange(right));
}
else if (right == null)
{
// Removed document.
return(GetEntireDocumentAsSpanChange(left));
}
var oldText = left.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var newText = right.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var diffSelector = _componentModel.GetService <ITextDifferencingSelectorService>();
var diffService = diffSelector.GetTextDifferencingService(
left.Project.LanguageServices.GetService <IContentTypeLanguageService>().GetDefaultContentType());
diffService = diffService ?? diffSelector.DefaultTextDifferencingService;
var diff = ComputeDiffSpans(oldText, newText, diffService, cancellationToken);
if (!diff.Differences.Any())
{
// There are no changes. Just show the whole document.
return(GetEntireDocumentAsSpanChange(left));
}
var spanChanges = new List <SpanChange>();
foreach (var difference in diff)
{
var leftSpan = diff.LeftDecomposition.GetSpanInOriginal(difference.Left);
var rightSpan = diff.RightDecomposition.GetSpanInOriginal(difference.Right);
var leftText = oldText.GetSubText(leftSpan.ToTextSpan()).ToString();
var rightText = newText.GetSubText(rightSpan.ToTextSpan()).ToString();
var trackingSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(leftSpan, SpanTrackingMode.EdgeInclusive);
var isDeletion = difference.DifferenceType == DifferenceType.Remove;
var displayText = isDeletion ? GetDisplayText(leftText) : GetDisplayText(rightText);
var spanChange = new SpanChange(trackingSpan, _buffer, right.Id, displayText, leftText, rightText, difference.DifferenceType == DifferenceType.Remove, this, engine);
spanChanges.Add(spanChange);
}
return(new ChangeList(spanChanges.ToArray()));
}
public void UpdateView(TextDocument document, SpanChange spanSource)
{
var documentText = document.GetTextAsync().Result.ToString();
if (TextView.TextBuffer.CurrentSnapshot.GetText() != documentText)
{
UpdateBuffer(document, spanSource, out var container, out var documentBackedByTextBuffer);
}
// Picking a different span: no text change; update span anyway.
SpanToShow = spanSource.GetSpan();
var spanInBuffer = new SnapshotSpan(TextView.TextBuffer.CurrentSnapshot, new Span(SpanToShow.Start, 0));
TextView.ViewScroller.EnsureSpanVisible(spanInBuffer, EnsureSpanVisibleOptions.None);
Tagger.OnTextBufferChanged();
}
public void UpdateView(TextDocument document, SpanChange spanSource)
{
var documentText = document.GetTextAsync().Result.ToString();
if (TextView.TextBuffer.CurrentSnapshot.GetText() != documentText)
{
UpdateBuffer(document, spanSource, out _, out _);
}
// Picking a different span: no text change; update span anyway.
SpanToShow = spanSource.GetSpan();
var spanInBuffer = new SnapshotSpan(TextView.TextBuffer.CurrentSnapshot, new Span(SpanToShow.Start, 0));
TextView.ViewScroller.EnsureSpanVisible(spanInBuffer, EnsureSpanVisibleOptions.None);
Tagger.OnTextBufferChanged();
}
private void ApplyDocumentToBuffer(TextDocument document, SpanChange spanSource, out SourceTextContainer container, out TextDocument documentBackedByTextBuffer)
{
var contentTypeService = document.Project.LanguageServices.GetService<IContentTypeLanguageService>();
var contentType = contentTypeService.GetDefaultContentType();
TextView.TextBuffer.ChangeContentType(contentType, null);
var documentText = document.GetTextAsync().Result.ToString();
SpanToShow = spanSource.GetSpan();
using (var edit = TextView.TextBuffer.CreateEdit())
{
edit.Replace(new Span(0, TextView.TextBuffer.CurrentSnapshot.Length), documentText);
edit.Apply();
}
container = TextView.TextBuffer.AsTextContainer();
documentBackedByTextBuffer = document.WithText(container.CurrentText);
}
private ChangeList GetChangeList(
IHierarchicalDifferenceCollection diff,
DocumentId id,
SourceText oldText,
SourceText newText
)
{
var spanChanges = new List <SpanChange>();
foreach (var difference in diff)
{
var leftSpan = diff.LeftDecomposition.GetSpanInOriginal(difference.Left);
var rightSpan = diff.RightDecomposition.GetSpanInOriginal(difference.Right);
var leftText = oldText.GetSubText(leftSpan.ToTextSpan()).ToString();
var rightText = newText.GetSubText(rightSpan.ToTextSpan()).ToString();
var trackingSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(
leftSpan,
SpanTrackingMode.EdgeInclusive
);
var isDeletion = difference.DifferenceType == DifferenceType.Remove;
var displayText = isDeletion ? GetDisplayText(leftText) : GetDisplayText(rightText);
var spanChange = new SpanChange(
trackingSpan,
_buffer,
id,
displayText,
leftText,
rightText,
isDeletion,
this,
engine
);
spanChanges.Add(spanChange);
}
return(new ChangeList(spanChanges.ToArray()));
}
private void ApplyDocumentToBuffer(Document document, SpanChange spanSource, out SourceTextContainer container, out Document documentBackedByTextBuffer)
{
var contentTypeService = document.Project.LanguageServices.GetService <IContentTypeLanguageService>();
var contentType = contentTypeService.GetDefaultContentType();
TextView.TextBuffer.ChangeContentType(contentType, null);
var documentText = document.GetTextAsync().Result.ToString();
SpanToShow = spanSource.GetSpan();
using (var edit = TextView.TextBuffer.CreateEdit())
{
edit.Replace(new Span(0, TextView.TextBuffer.CurrentSnapshot.Length), documentText);
edit.Apply();
}
container = TextView.TextBuffer.AsTextContainer();
documentBackedByTextBuffer = document.WithText(container.CurrentText);
}
private ChangeList GetChangeList(IHierarchicalDifferenceCollection diff, DocumentId id, SourceText oldText, SourceText newText)
{
var spanChanges = new List<SpanChange>();
foreach (var difference in diff)
{
var leftSpan = diff.LeftDecomposition.GetSpanInOriginal(difference.Left);
var rightSpan = diff.RightDecomposition.GetSpanInOriginal(difference.Right);
var leftText = oldText.GetSubText(leftSpan.ToTextSpan()).ToString();
var rightText = newText.GetSubText(rightSpan.ToTextSpan()).ToString();
var trackingSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(leftSpan, SpanTrackingMode.EdgeInclusive);
var isDeletion = difference.DifferenceType == DifferenceType.Remove;
var displayText = isDeletion ? GetDisplayText(leftText) : GetDisplayText(rightText);
var spanChange = new SpanChange(trackingSpan, _buffer, id, displayText, leftText, rightText, isDeletion, this, engine);
spanChanges.Add(spanChange);
}
return new ChangeList(spanChanges.ToArray());
}
private ChangeList GetEntireDocumentAsSpanChange(TextDocument document)
{
// Show the whole document.
var entireSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(0, _buffer.CurrentSnapshot.Length, SpanTrackingMode.EdgeInclusive);
var text = document.GetTextAsync().Result.ToString();
var displayText = GetDisplayText(text);
var entireSpanChild = new SpanChange(entireSpan, _buffer, document.Id, displayText, text, text, isDeletion: false, parent: this, engine: engine);
return new ChangeList(new[] { entireSpanChild });
}
public void UpdatePreview(DocumentId documentId, SpanChange spanSource)
{
var updatedSolution = _topLevelChange.GetUpdatedSolution(applyingChanges: false);
var document = updatedSolution.GetTextDocument(documentId);
if (document != null)
{
_updater.UpdateView(document, spanSource);
}
}
private ChangeList ComputeChildren(TextDocument left, TextDocument right, CancellationToken cancellationToken)
{
if (left == null)
{
// Added document.
return GetEntireDocumentAsSpanChange(right);
}
else if (right == null)
{
// Removed document.
return GetEntireDocumentAsSpanChange(left);
}
var oldText = left.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var newText = right.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var diffSelector = _componentModel.GetService<ITextDifferencingSelectorService>();
var diffService = diffSelector.GetTextDifferencingService(
left.Project.LanguageServices.GetService<IContentTypeLanguageService>().GetDefaultContentType());
diffService = diffService ?? diffSelector.DefaultTextDifferencingService;
var diff = ComputeDiffSpans(oldText, newText, diffService, cancellationToken);
if (!diff.Differences.Any())
{
// There are no changes. Just show the whole document.
return GetEntireDocumentAsSpanChange(left);
}
var spanChanges = new List<SpanChange>();
foreach (var difference in diff)
{
var leftSpan = diff.LeftDecomposition.GetSpanInOriginal(difference.Left);
var rightSpan = diff.RightDecomposition.GetSpanInOriginal(difference.Right);
var leftText = oldText.GetSubText(leftSpan.ToTextSpan()).ToString();
var rightText = newText.GetSubText(rightSpan.ToTextSpan()).ToString();
var trackingSpan = _buffer.CurrentSnapshot.CreateTrackingSpan(leftSpan, SpanTrackingMode.EdgeInclusive);
var isDeletion = difference.DifferenceType == DifferenceType.Remove;
var displayText = isDeletion ? GetDisplayText(leftText) : GetDisplayText(rightText);
var spanChange = new SpanChange(trackingSpan, _buffer, right.Id, displayText, leftText, rightText, difference.DifferenceType == DifferenceType.Remove, this, engine);
spanChanges.Add(spanChange);
}
return new ChangeList(spanChanges.ToArray());
}
