public void Dispose()
{
// Unsubscribe from events
_textView.TextBuffer.PostChanged -= TextBuffer_PostChanged;
_debuggerTextView.Cleanup();
// The buffer graph subscribes to events of its source buffers, we're no longer interested
_projectionBuffer.DeleteSpans(0, _projectionBuffer.CurrentSnapshot.SpanCount);
// The next request will use a new workspace
_workspace.Dispose();
}
private async ValueTask <DifferenceViewerPreview> CreateNewDifferenceViewerAsync(
PreviewWorkspace?leftWorkspace, PreviewWorkspace?rightWorkspace,
IProjectionBuffer originalBuffer, IProjectionBuffer changedBuffer,
double zoomLevel, CancellationToken cancellationToken)
{
// IWpfDifferenceViewerFactoryService is a Visual Studio API which is not documented as free-threaded
await ThreadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
// leftWorkspace can be null if the change is adding a document.
// rightWorkspace can be null if the change is removing a document.
// However both leftWorkspace and rightWorkspace can't be null at the same time.
Contract.ThrowIfTrue((leftWorkspace == null) && (rightWorkspace == null));
var diffBuffer = _differenceBufferService.CreateDifferenceBuffer(
originalBuffer, changedBuffer,
new StringDifferenceOptions(), disableEditing: true);
var mode = leftWorkspace == null ? DifferenceViewMode.RightViewOnly :
rightWorkspace == null ? DifferenceViewMode.LeftViewOnly :
DifferenceViewMode.Inline;
var diffViewer = await CreateDifferenceViewAsync(diffBuffer, _previewRoleSet, mode, zoomLevel, cancellationToken).ConfigureAwait(true);
diffViewer.Closed += (s, e) =>
{
// Workaround Editor bug. The editor has an issue where they sometimes crash when
// trying to apply changes to projection buffer. So, when the user actually invokes
// a SuggestedAction we may then edit a text buffer, which the editor will then
// try to propagate through the projections we have here over that buffer. To ensure
// that that doesn't happen, we clear out the projections first so that this crash
// won't happen.
originalBuffer.DeleteSpans(0, originalBuffer.CurrentSnapshot.SpanCount);
changedBuffer.DeleteSpans(0, changedBuffer.CurrentSnapshot.SpanCount);
leftWorkspace?.Dispose();
leftWorkspace = null;
rightWorkspace?.Dispose();
rightWorkspace = null;
};
if (_globalOptions.GetOption(SolutionCrawlerRegistrationService.EnableSolutionCrawler))
{
leftWorkspace?.EnableSolutionCrawler();
rightWorkspace?.EnableSolutionCrawler();
}
return(new DifferenceViewerPreview(diffViewer));
}
private async Task <object> CreateNewDifferenceViewerAsync(
PreviewWorkspace leftWorkspace, PreviewWorkspace rightWorkspace,
IProjectionBuffer originalBuffer, IProjectionBuffer changedBuffer,
double zoomLevel, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
// leftWorkspace can be null if the change is adding a document.
// rightWorkspace can be null if the change is removing a document.
// However both leftWorkspace and rightWorkspace can't be null at the same time.
Contract.ThrowIfTrue((leftWorkspace == null) && (rightWorkspace == null));
var diffBuffer = _differenceBufferService.CreateDifferenceBuffer(
originalBuffer, changedBuffer,
new StringDifferenceOptions(), disableEditing: true);
var diffViewer = _differenceViewerService.CreateDifferenceView(diffBuffer, _previewRoleSet);
diffViewer.Closed += (s, e) =>
{
// Workaround Editor bug. The editor has an issue where they sometimes crash when
// trying to apply changes to projection buffer. So, when the user actually invokes
// a SuggestedAction we may then edit a text buffer, which the editor will then
// try to propagate through the projections we have here over that buffer. To ensure
// that that doesn't happen, we clear out the projections first so that this crash
// won't happen.
originalBuffer.DeleteSpans(0, originalBuffer.CurrentSnapshot.SpanCount);
changedBuffer.DeleteSpans(0, changedBuffer.CurrentSnapshot.SpanCount);
leftWorkspace?.Dispose();
leftWorkspace = null;
rightWorkspace?.Dispose();
rightWorkspace = null;
};
const string DiffOverviewMarginName = "deltadifferenceViewerOverview";
if (leftWorkspace == null)
{
diffViewer.ViewMode = DifferenceViewMode.RightViewOnly;
diffViewer.RightView.ZoomLevel *= zoomLevel;
diffViewer.RightHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
else if (rightWorkspace == null)
{
diffViewer.ViewMode = DifferenceViewMode.LeftViewOnly;
diffViewer.LeftView.ZoomLevel *= zoomLevel;
diffViewer.LeftHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
else
{
diffViewer.ViewMode = DifferenceViewMode.Inline;
diffViewer.InlineView.ZoomLevel *= zoomLevel;
diffViewer.InlineHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
// Disable focus / tab stop for the diff viewer.
diffViewer.RightView.VisualElement.Focusable = false;
diffViewer.LeftView.VisualElement.Focusable = false;
diffViewer.InlineView.VisualElement.Focusable = false;
// This code path must be invoked on UI thread.
AssertIsForeground();
// We use ConfigureAwait(true) to stay on the UI thread.
await diffViewer.SizeToFitAsync(ThreadingContext).ConfigureAwait(true);
leftWorkspace?.EnableDiagnostic();
rightWorkspace?.EnableDiagnostic();
return(new DifferenceViewerPreview(diffViewer));
}
private async Task<object> CreateNewDifferenceViewerAsync(
PreviewWorkspace leftWorkspace, PreviewWorkspace rightWorkspace,
IProjectionBuffer originalBuffer, IProjectionBuffer changedBuffer,
double zoomLevel, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
// leftWorkspace can be null if the change is adding a document.
// rightWorkspace can be null if the change is removing a document.
// However both leftWorkspace and rightWorkspace can't be null at the same time.
Contract.ThrowIfTrue((leftWorkspace == null) && (rightWorkspace == null));
var diffBuffer = _differenceBufferService.CreateDifferenceBuffer(
originalBuffer, changedBuffer,
new StringDifferenceOptions(), disableEditing: true);
var diffViewer = _differenceViewerService.CreateDifferenceView(diffBuffer, _previewRoleSet);
diffViewer.Closed += (s, e) =>
{
// Workaround Editor bug. The editor has an issue where they sometimes crash when
// trying to apply changes to projection buffer. So, when the user actually invokes
// a SuggestedAction we may then edit a text buffer, which the editor will then
// try to propagate through the projections we have here over that buffer. To ensure
// that that doesn't happen, we clear out the projections first so that this crash
// won't happen.
originalBuffer.DeleteSpans(0, originalBuffer.CurrentSnapshot.SpanCount);
changedBuffer.DeleteSpans(0, changedBuffer.CurrentSnapshot.SpanCount);
leftWorkspace?.Dispose();
leftWorkspace = null;
rightWorkspace?.Dispose();
rightWorkspace = null;
};
const string DiffOverviewMarginName = "deltadifferenceViewerOverview";
if (leftWorkspace == null)
{
diffViewer.ViewMode = DifferenceViewMode.RightViewOnly;
diffViewer.RightView.ZoomLevel *= zoomLevel;
diffViewer.RightHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
else if (rightWorkspace == null)
{
diffViewer.ViewMode = DifferenceViewMode.LeftViewOnly;
diffViewer.LeftView.ZoomLevel *= zoomLevel;
diffViewer.LeftHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
else
{
diffViewer.ViewMode = DifferenceViewMode.Inline;
diffViewer.InlineView.ZoomLevel *= zoomLevel;
diffViewer.InlineHost.GetTextViewMargin(DiffOverviewMarginName).VisualElement.Visibility = Visibility.Collapsed;
}
// Disable focus / tab stop for the diff viewer.
diffViewer.RightView.VisualElement.Focusable = false;
diffViewer.LeftView.VisualElement.Focusable = false;
diffViewer.InlineView.VisualElement.Focusable = false;
// This code path must be invoked on UI thread.
AssertIsForeground();
// We use ConfigureAwait(true) to stay on the UI thread.
await diffViewer.SizeToFitAsync().ConfigureAwait(true);
leftWorkspace?.EnableDiagnostic();
rightWorkspace?.EnableDiagnostic();
return new DifferenceViewerPreview(diffViewer);
}
