public void FormatSpan(SnapshotSpan span)
{
// Formatting a snippet isn't cancellable.
var cancellationToken = CancellationToken.None;
// At this point, the $selection$ token has been replaced with the selected text and
// declarations have been replaced with their default text. We need to format the
// inserted snippet text while carefully handling $end$ position (where the caret goes
// after Return is pressed). The IExpansionSession keeps a tracking point for this
// position but we do the tracking ourselves to properly deal with virtual space. To
// ensure the end location is correct, we take three extra steps:
// 1. Insert an empty comment ("/**/" or "'") at the current $end$ position (prior
// to formatting), and keep a tracking span for the comment.
// 2. After formatting the new snippet text, find and delete the empty multiline
// comment (via the tracking span) and notify the IExpansionSession of the new
// $end$ location. If the line then contains only whitespace (due to the formatter
// putting the empty comment on its own line), then delete the white space and
// remember the indentation depth for that line.
// 3. When the snippet is finally completed (via Return), and PositionCaretForEditing()
// is called, check to see if the end location was on a line containing only white
// space in the previous step. If so, and if that line is still empty, then position
// the caret in virtual space.
// This technique ensures that a snippet like "if($condition$) { $end$ }" will end up
// as:
// if ($condition$)
// {
// $end$
// }
if (!TryGetSubjectBufferSpan(span, out var snippetSpan))
{
return;
}
// Insert empty comment and track end position
var snippetTrackingSpan = snippetSpan.CreateTrackingSpan(SpanTrackingMode.EdgeInclusive);
var fullSnippetSpan = ExpansionSession.GetSnippetSpan();
var isFullSnippetFormat = fullSnippetSpan == span;
var endPositionTrackingSpan = isFullSnippetFormat ? InsertEmptyCommentAndGetEndPositionTrackingSpan() : null;
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(SubjectBuffer.CurrentSnapshot, snippetTrackingSpan.GetSpan(SubjectBuffer.CurrentSnapshot));
SubjectBuffer.CurrentSnapshot.FormatAndApplyToBuffer(formattingSpan, CancellationToken.None);
if (isFullSnippetFormat)
{
CleanUpEndLocation(endPositionTrackingSpan);
// Unfortunately, this is the only place we can safely add references and imports
// specified in the snippet xml. In OnBeforeInsertion we have no guarantee that the
// snippet xml will be available, and changing the buffer during OnAfterInsertion can
// cause the underlying tracking spans to get out of sync.
var currentStartPosition = snippetTrackingSpan.GetStartPoint(SubjectBuffer.CurrentSnapshot).Position;
AddReferencesAndImports(
ExpansionSession, currentStartPosition, cancellationToken);
SetNewEndPosition(endPositionTrackingSpan);
}
}
public async Task <ImmutableArray <TextChange> > GetFormattingChangesOnPasteAsync(
Document document,
TextSpan textSpan,
DocumentOptionSet?documentOptions,
CancellationToken cancellationToken)
{
var root = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, textSpan);
var service = document.GetRequiredLanguageService <ISyntaxFormattingService>();
var rules = new List <AbstractFormattingRule>()
{
new PasteFormattingRule()
};
rules.AddRange(service.GetDefaultFormattingRules());
if (documentOptions == null)
{
var inferredIndentationService = document.Project.Solution.Workspace.Services.GetRequiredService <IInferredIndentationService>();
documentOptions = await inferredIndentationService.GetDocumentOptionsWithInferredIndentationAsync(document, explicitFormat : false, cancellationToken : cancellationToken).ConfigureAwait(false);
}
var formattingOptions = SyntaxFormattingOptions.Create(documentOptions, document.Project.Solution.Workspace.Services, document.Project.Language);
var result = service.GetFormattingResult(root, SpecializedCollections.SingletonEnumerable(formattingSpan), formattingOptions, rules, cancellationToken);
return(result.GetTextChanges(cancellationToken).ToImmutableArray());
}
protected static async Task <LSP.TextEdit[]?> GetTextEditsAsync(
RequestContext context,
LSP.FormattingOptions options,
IGlobalOptionService globalOptions,
CancellationToken cancellationToken,
LSP.Range?range = null)
{
var document = context.Document;
if (document == null)
{
return(null);
}
var text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
var root = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var rangeSpan = (range != null) ? ProtocolConversions.RangeToTextSpan(range, text) : new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, rangeSpan);
// We should use the options passed in by LSP instead of the document's options.
var formattingOptions = await ProtocolConversions.GetFormattingOptionsAsync(options, document, globalOptions, cancellationToken).ConfigureAwait(false);
var services = document.Project.Solution.Services;
var textChanges = Formatter.GetFormattedTextChanges(root, SpecializedCollections.SingletonEnumerable(formattingSpan), services, formattingOptions, rules: null, cancellationToken);
var edits = new ArrayBuilder <LSP.TextEdit>();
edits.AddRange(textChanges.Select(change => ProtocolConversions.TextChangeToTextEdit(change, text)));
return(edits.ToArrayAndFree());
}
public int GetIndentationOfCurrentPosition(
SyntaxNode root,
IndentBlockOperation startingOperation,
Func <SyntaxToken, int> tokenColumnGetter,
CancellationToken cancellationToken)
{
var token = startingOperation.StartToken;
// gather all indent operations
var list = GetParentIndentBlockOperations(token);
// remove one that is smaller than current one
for (int i = list.Count - 1; i >= 0; i--)
{
if (CommonFormattingHelpers.IndentBlockOperationComparer(startingOperation, list[i]) < 0)
{
list.RemoveAt(i);
}
else
{
break;
}
}
return(GetIndentationOfCurrentPosition(root, token, list, token.SpanStart, /* extraSpaces */ 0, tokenColumnGetter, cancellationToken));
}
public Task <Document> FormatAsync(Document document, ImmutableArray <TextSpan> changes, CancellationToken cancellationToken)
{
var root = document.GetSyntaxRootSynchronously(cancellationToken);
var formattingSpans = changes.Select(s => CommonFormattingHelpers.GetFormattingSpan(root, s));
return(Formatter.FormatAsync(document, formattingSpans, cancellationToken: cancellationToken));
}
public Document Format(Document document, IEnumerable <TextSpan> changes, CancellationToken cancellationToken)
{
var root = document.GetSyntaxRootSynchronously(cancellationToken);
var formattingSpans = changes.Select(s => CommonFormattingHelpers.GetFormattingSpan(root, s));
return(Formatter.FormatAsync(document, formattingSpans, cancellationToken: cancellationToken).WaitAndGetResult(cancellationToken));
}
public override AdjustSpacesOperation GetAdjustSpacesOperation(SyntaxToken previousToken, SyntaxToken currentToken, OptionSet optionSet, NextOperation <AdjustSpacesOperation> nextOperation)
{
var operation = nextOperation.Invoke();
if (operation == null)
{
return(null);
}
// if operation is already forced, return as it is.
if (operation.Option == AdjustSpacesOption.ForceSpaces)
{
return(operation);
}
if (CommonFormattingHelpers.HasAnyWhitespaceElasticTrivia(previousToken, currentToken))
{
// current implementation of engine gives higher priority on new line operations over space operations if
// two are conflicting.
// ex) new line operation says add 1 line between tokens, and
// space operation says give 1 space between two tokens (basically means remove new lines)
// then, engine will pick new line operation and ignore space operation
// make every operation forced
return(CreateAdjustSpacesOperation(Math.Max(0, operation.Space), AdjustSpacesOption.ForceSpaces));
}
return(operation);
}
private void AdjustIndentationForSpan(
Document document, ITextEdit edit, TextSpan visibleSpan, IFormattingRule baseIndentationRule, OptionSet options)
{
var root = document.GetSyntaxRootAsync(CancellationToken.None).WaitAndGetResult(CancellationToken.None);
using (var rulePool = SharedPools.Default <List <IFormattingRule> >().GetPooledObject())
using (var spanPool = SharedPools.Default <List <TextSpan> >().GetPooledObject())
{
var venusFormattingRules = rulePool.Object;
var visibleSpans = spanPool.Object;
venusFormattingRules.Add(baseIndentationRule);
venusFormattingRules.Add(ContainedDocumentPreserveFormattingRule.Instance);
var formattingRules = venusFormattingRules.Concat(Formatter.GetDefaultFormattingRules(document));
var workspace = document.Project.Solution.Workspace;
var changes = Formatter.GetFormattedTextChanges(
root, new TextSpan[] { CommonFormattingHelpers.GetFormattingSpan(root, visibleSpan) },
workspace, options, formattingRules, CancellationToken.None);
visibleSpans.Add(visibleSpan);
var newChanges = FilterTextChanges(document.GetTextAsync(CancellationToken.None).WaitAndGetResult(CancellationToken.None), visibleSpans, changes.ToReadOnlyCollection()).Where(t => visibleSpan.Contains(t.Span));
foreach (var change in newChanges)
{
edit.Replace(change.Span.ToSpan(), change.NewText);
}
}
}
public override string GetTextBetween(SyntaxToken token1, SyntaxToken token2)
{
var builder = StringBuilderPool.Allocate();
CommonFormattingHelpers.AppendTextBetween(token1, token2, builder);
return(StringBuilderPool.ReturnAndFree(builder));
}
public override AdjustNewLinesOperation GetAdjustNewLinesOperation(SyntaxToken previousToken, SyntaxToken currentToken, OptionSet optionSet, NextOperation <AdjustNewLinesOperation> nextOperation)
{
var operation = nextOperation.Invoke();
if (operation == null)
{
// If there are more than one Type Parameter Constraint Clause then each go in separate line
if (CommonFormattingHelpers.HasAnyWhitespaceElasticTrivia(previousToken, currentToken) &&
currentToken.IsKind(SyntaxKind.WhereKeyword) &&
currentToken.Parent.IsKind(SyntaxKind.TypeParameterConstraintClause))
{
// Check if there is another TypeParameterConstraintClause before
if (previousToken.Parent.Ancestors().OfType <TypeParameterConstraintClauseSyntax>().Any())
{
return(CreateAdjustNewLinesOperation(1, AdjustNewLinesOption.PreserveLines));
}
// Check if there is another TypeParameterConstraintClause after
var firstTokenAfterTypeConstraint = currentToken.Parent.GetLastToken().GetNextToken();
var lastTokenForTypeConstraint = currentToken.Parent.GetLastToken().GetNextToken();
if (CommonFormattingHelpers.HasAnyWhitespaceElasticTrivia(lastTokenForTypeConstraint, firstTokenAfterTypeConstraint) &&
firstTokenAfterTypeConstraint.IsKind(SyntaxKind.WhereKeyword) &&
firstTokenAfterTypeConstraint.Parent.IsKind(SyntaxKind.TypeParameterConstraintClause))
{
return(CreateAdjustNewLinesOperation(1, AdjustNewLinesOption.PreserveLines));
}
}
return(null);
}
// if operation is already forced, return as it is.
if (operation.Option == AdjustNewLinesOption.ForceLines)
{
return(operation);
}
if (!CommonFormattingHelpers.HasAnyWhitespaceElasticTrivia(previousToken, currentToken))
{
return(operation);
}
var betweenMemberOperation = GetAdjustNewLinesOperationBetweenMembers(previousToken, currentToken);
if (betweenMemberOperation != null)
{
return(betweenMemberOperation);
}
var line = Math.Max(LineBreaksAfter(previousToken, currentToken), operation.Line);
if (line == 0)
{
return(CreateAdjustNewLinesOperation(0, AdjustNewLinesOption.PreserveLines));
}
return(CreateAdjustNewLinesOperation(line, AdjustNewLinesOption.ForceLines));
}
public async Task <IList <TextChange> > GetFormattingChangesAsync(Document document, TextSpan?textSpan, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var span = textSpan.HasValue ? textSpan.Value : new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, span);
return(Formatter.GetFormattedTextChanges(root, new TextSpan[] { formattingSpan }, document.Project.Solution.Workspace, cancellationToken: cancellationToken));
}
public Document Format(Document document, IEnumerable <TextSpan> changes, CancellationToken cancellationToken)
{
var snapshot = document.GetTextAsync(cancellationToken).WaitAndGetResult(cancellationToken).FindCorrespondingEditorTextSnapshot();
var root = document.GetSyntaxRootAsync(cancellationToken).WaitAndGetResult(cancellationToken);
var formattingSpans = changes.Select(s => s.ToSnapshotSpan(snapshot))
.Select(s => CommonFormattingHelpers.GetFormattingSpan(root, s.Span.ToTextSpan()));
return(Formatter.FormatAsync(document, formattingSpans, cancellationToken: cancellationToken).WaitAndGetResult(cancellationToken));
}
public static bool AreTwoTokensOnSameLine(SyntaxToken token1, SyntaxToken token2)
{
var tree = token1.SyntaxTree;
if (tree != null && tree.TryGetText(out var text))
{
return(text.AreOnSameLine(token1, token2));
}
return(CommonFormattingHelpers.GetTextBetween(token1, token2).ContainsLineBreak());
}
public async Task<IList<TextChange>> GetFormattingChangesAsync(Document document, TextSpan? textSpan, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var options = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var span = textSpan ?? new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, span);
return Formatter.GetFormattedTextChanges(root,
SpecializedCollections.SingletonEnumerable(formattingSpan),
document.Project.Solution.Workspace, options, cancellationToken);
}
public async Task <IList <TextChange> > GetFormattingChangesAsync(Document document, TextSpan?textSpan, CancellationToken cancellationToken)
{
var root = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var span = textSpan ?? new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, span);
var options = await document.GetDocumentOptionsWithInferredIndentationAsync(explicitFormat : true, indentationManagerService : _indentationManagerService, cancellationToken : cancellationToken).ConfigureAwait(false);
return(Formatter.GetFormattedTextChanges(root,
SpecializedCollections.SingletonEnumerable(formattingSpan),
document.Project.Solution.Workspace, options, cancellationToken));
}
private void AddChangeSignatureIndentOperation(List <IndentBlockOperation> list, SyntaxNode node)
{
if (node.Parent != null)
{
var baseToken = node.Parent.GetFirstToken();
var startToken = node.GetFirstToken();
var endToken = node.GetLastToken();
var span = CommonFormattingHelpers.GetSpanIncludingTrailingAndLeadingTriviaOfAdjacentTokens(startToken, endToken);
span = TextSpan.FromBounds(Math.Max(baseToken.Span.End, span.Start), span.End);
list.Add(FormattingOperations.CreateRelativeIndentBlockOperation(baseToken, startToken, endToken, span, indentationDelta: 1, option: IndentBlockOption.RelativeToFirstTokenOnBaseTokenLine));
}
}
public Task <ImmutableArray <TextChange> > GetFormattingChangesAsync(
Document document,
ITextBuffer textBuffer,
TextSpan?textSpan,
CancellationToken cancellationToken)
{
var parsedDocument = ParsedDocument.CreateSynchronously(document, cancellationToken);
var options = textBuffer.GetSyntaxFormattingOptions(_editorOptionsService, parsedDocument.LanguageServices, explicitFormat: true);
var span = textSpan ?? new TextSpan(0, parsedDocument.Root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(parsedDocument.Root, span);
return(Task.FromResult(Formatter.GetFormattedTextChanges(parsedDocument.Root, SpecializedCollections.SingletonEnumerable(formattingSpan), document.Project.Solution.Services, options, cancellationToken).ToImmutableArray()));
}
private static bool AreTwoTokensOnSameLine(SyntaxToken token1, SyntaxToken token2)
{
var tree = token1.SyntaxTree;
var text = default(SourceText);
if (tree != null && tree.TryGetText(out text))
{
var line1 = text.Lines.IndexOf(token1.Span.End);
var line2 = text.Lines.IndexOf(token2.SpanStart);
return(line1 == line2);
}
return(CommonFormattingHelpers.GetTextBetween(token1, token2).GetNumberOfLineBreaks() == 0);
}
public async Task <ImmutableArray <TextChange> > GetFormattingChangesAsync(
Document document,
TextSpan?textSpan,
CancellationToken cancellationToken)
{
var options = await _indentationManager.GetInferredFormattingOptionsAsync(document, explicitFormat : true, cancellationToken).ConfigureAwait(false);
var root = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var span = textSpan ?? new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, span);
var services = document.Project.Solution.Workspace.Services;
return(Formatter.GetFormattedTextChanges(root, SpecializedCollections.SingletonEnumerable(formattingSpan), services, options, cancellationToken).ToImmutableArray());
}
public AbstractComplexTrivia(OptionSet optionSet, TreeData treeInfo, SyntaxToken token1, SyntaxToken token2)
: base(optionSet, token1.Language)
{
Contract.ThrowIfNull(treeInfo);
_token1 = token1;
_token2 = token2;
_treatAsElastic = CommonFormattingHelpers.HasAnyWhitespaceElasticTrivia(token1, token2);
this.TreeInfo = treeInfo;
this.OriginalString = this.TreeInfo.GetTextBetween(token1, token2);
ExtractLineAndSpace(this.OriginalString, out var lineBreaks, out var spaces);
this.LineBreaks = lineBreaks;
this.Spaces = spaces;
}
public async Task<IList<TextChange>> GetFormattingChangesOnPasteAsync(Document document, TextSpan textSpan, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var options = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, textSpan);
var service = document.GetLanguageService<ISyntaxFormattingService>();
if (service == null)
{
return SpecializedCollections.EmptyList<TextChange>();
}
var rules = new List<IFormattingRule>() { new PasteFormattingRule() };
rules.AddRange(service.GetDefaultFormattingRules());
return Formatter.GetFormattedTextChanges(root, SpecializedCollections.SingletonEnumerable(formattingSpan), document.Project.Solution.Workspace, options, rules, cancellationToken);
}
private void ApplyEdits(Document document, ITextView textView, ITextBuffer subjectBuffer, string title, CommentSelectionResult edits, CancellationToken cancellationToken)
{
var originalSnapshot = subjectBuffer.CurrentSnapshot;
// Apply the text changes.
using (var transaction = new CaretPreservingEditTransaction(title, textView, _undoHistoryRegistry, _editorOperationsFactoryService))
{
subjectBuffer.ApplyChanges(edits.TextChanges);
transaction.Complete();
}
if (edits.TrackingSpans.Any())
{
// Create tracking spans to track the text changes.
var trackingSpans = edits.TrackingSpans
.SelectAsArray(textSpan => (originalSpan: textSpan, trackingSpan: CreateTrackingSpan(edits.ResultOperation, originalSnapshot, textSpan.TrackingTextSpan)));
// Convert the tracking spans into snapshot spans for formatting and selection.
var trackingSnapshotSpans = trackingSpans.Select(s => CreateSnapshotSpan(subjectBuffer.CurrentSnapshot, s.trackingSpan, s.originalSpan));
if (edits.ResultOperation == Operation.Uncomment && document.SupportsSyntaxTree)
{
// Format the document only during uncomment operations. Use second transaction so it can be undone.
using var transaction = new CaretPreservingEditTransaction(title, textView, _undoHistoryRegistry, _editorOperationsFactoryService);
var newText = subjectBuffer.CurrentSnapshot.AsText();
var oldSyntaxTree = document.GetSyntaxTreeSynchronously(cancellationToken);
var newRoot = oldSyntaxTree.WithChangedText(newText).GetRoot(cancellationToken);
var formattingOptions = subjectBuffer.GetSyntaxFormattingOptions(_editorOptionsService, document.Project.LanguageServices, explicitFormat: false);
var formattingSpans = trackingSnapshotSpans.Select(change => CommonFormattingHelpers.GetFormattingSpan(newRoot, change.Span.ToTextSpan()));
var formattedChanges = Formatter.GetFormattedTextChanges(newRoot, formattingSpans, document.Project.Solution.Services, formattingOptions, rules: null, cancellationToken);
subjectBuffer.ApplyChanges(formattedChanges);
transaction.Complete();
}
// Set the multi selection after edits have been applied.
textView.SetMultiSelection(trackingSnapshotSpans);
}
}
private void AddSwitchIndentationOperation(List <IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet)
{
var section = node as SwitchSectionSyntax;
if (section == null || !optionSet.GetOption(CSharpFormattingOptions.IndentSwitchCaseSection))
{
return;
}
// can this ever happen?
if (section.Labels.Count == 0 &&
section.Statements.Count == 0)
{
return;
}
// see whether we are the last statement
var switchStatement = node.Parent as SwitchStatementSyntax;
var lastSection = switchStatement.Sections.Last() == node;
if (section.Statements.Count == 0)
{
// even if there is no statement under section, we still want indent operation
var lastTokenOfLabel = section.Labels.Last().GetLastToken(includeZeroWidth: true);
var nextToken = lastTokenOfLabel.GetNextToken(includeZeroWidth: true);
AddIndentBlockOperation(list, lastTokenOfLabel, lastTokenOfLabel,
lastSection ?
TextSpan.FromBounds(lastTokenOfLabel.FullSpan.End, nextToken.SpanStart) : TextSpan.FromBounds(lastTokenOfLabel.FullSpan.End, lastTokenOfLabel.FullSpan.End));
return;
}
var startToken = section.Statements.First().GetFirstToken(includeZeroWidth: true);
var endToken = section.Statements.Last().GetLastToken(includeZeroWidth: true);
// see whether we are the last statement
var span = CommonFormattingHelpers.GetSpanIncludingTrailingAndLeadingTriviaOfAdjacentTokens(startToken, endToken);
span = lastSection ? span : TextSpan.FromBounds(span.Start, endToken.FullSpan.End);
AddIndentBlockOperation(list, startToken, endToken, span);
}
protected void RemoveIndentBlockOperation(
List <IndentBlockOperation> list,
SyntaxToken startToken,
SyntaxToken endToken)
{
if (startToken.CSharpKind() == SyntaxKind.None || endToken.CSharpKind() == SyntaxKind.None)
{
return;
}
var span = CommonFormattingHelpers.GetSpanIncludingTrailingAndLeadingTriviaOfAdjacentTokens(startToken, endToken);
for (int i = 0; i < list.Count; i++)
{
if (list[i] != null && list[i].TextSpan == span)
{
list[i] = null;
return;
}
}
}
protected static void AddUnindentBlockOperation(
List <IndentBlockOperation> list,
SyntaxToken startToken,
SyntaxToken endToken,
bool includeTriviaAtEnd = false,
IndentBlockOption option = IndentBlockOption.RelativePosition
)
{
if (startToken.Kind() == SyntaxKind.None || endToken.Kind() == SyntaxKind.None)
{
return;
}
if (includeTriviaAtEnd)
{
list.Add(
FormattingOperations.CreateIndentBlockOperation(
startToken,
endToken,
indentationDelta: -1,
option: option
)
);
}
else
{
var startPosition = CommonFormattingHelpers.GetStartPositionOfSpan(startToken);
var endPosition = endToken.Span.End;
list.Add(
FormattingOperations.CreateIndentBlockOperation(
startToken,
endToken,
TextSpan.FromBounds(startPosition, endPosition),
indentationDelta: -1,
option: option
)
);
}
}
public async Task <ImmutableArray <TextChange> > GetFormattingChangesAsync(
Document document,
TextSpan?textSpan,
DocumentOptionSet?documentOptions,
CancellationToken cancellationToken)
{
var root = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var span = textSpan ?? new TextSpan(0, root.FullSpan.Length);
var formattingSpan = CommonFormattingHelpers.GetFormattingSpan(root, span);
if (documentOptions == null)
{
var inferredIndentationService = document.Project.Solution.Workspace.Services.GetRequiredService <IInferredIndentationService>();
documentOptions = await inferredIndentationService.GetDocumentOptionsWithInferredIndentationAsync(document, explicitFormat : true, cancellationToken : cancellationToken).ConfigureAwait(false);
}
var services = document.Project.Solution.Workspace.Services;
var formattingOptions = SyntaxFormattingOptions.Create(documentOptions, services, document.Project.Language);
return(Formatter.GetFormattedTextChanges(root, SpecializedCollections.SingletonEnumerable(formattingSpan), services, formattingOptions, cancellationToken).ToImmutableArray());
}
private void AddSwitchIndentationOperation(List <IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet)
{
var section = node as SwitchSectionSyntax;
if (section == null)
{
return;
}
// can this ever happen?
if (section.Labels.Count == 0 &&
section.Statements.Count == 0)
{
return;
}
var indentSwitchCase = optionSet.GetOption(CSharpFormattingOptions.IndentSwitchCaseSection);
var indentSwitchCaseWhenBlock = optionSet.GetOption(CSharpFormattingOptions.IndentSwitchCaseSectionWhenBlock);
if (!indentSwitchCase && !indentSwitchCaseWhenBlock)
{
// Never indent
return;
}
var alwaysIndent = indentSwitchCase && indentSwitchCaseWhenBlock;
if (!alwaysIndent)
{
// Only one of these values can be true at this point.
Debug.Assert(indentSwitchCase != indentSwitchCaseWhenBlock);
var firstStatementIsBlock =
section.Statements.Count > 0 &&
section.Statements[0].IsKind(SyntaxKind.Block);
if (indentSwitchCaseWhenBlock != firstStatementIsBlock)
{
return;
}
}
// see whether we are the last statement
var switchStatement = node.Parent as SwitchStatementSyntax;
var lastSection = switchStatement.Sections.Last() == node;
if (section.Statements.Count == 0)
{
// even if there is no statement under section, we still want indent operation
var lastTokenOfLabel = section.Labels.Last().GetLastToken(includeZeroWidth: true);
var nextToken = lastTokenOfLabel.GetNextToken(includeZeroWidth: true);
AddIndentBlockOperation(list, lastTokenOfLabel, lastTokenOfLabel,
lastSection ?
TextSpan.FromBounds(lastTokenOfLabel.FullSpan.End, nextToken.SpanStart) : TextSpan.FromBounds(lastTokenOfLabel.FullSpan.End, lastTokenOfLabel.FullSpan.End));
return;
}
var startToken = section.Statements.First().GetFirstToken(includeZeroWidth: true);
var endToken = section.Statements.Last().GetLastToken(includeZeroWidth: true);
// see whether we are the last statement
var span = CommonFormattingHelpers.GetSpanIncludingTrailingAndLeadingTriviaOfAdjacentTokens(startToken, endToken);
span = lastSection ? span : TextSpan.FromBounds(span.Start, endToken.FullSpan.End);
AddIndentBlockOperation(list, startToken, endToken, span);
}
/// <summary>
/// create indent block region around the start and end token with the given indentation delta added to the column of the base token
/// </summary>
public static IndentBlockOperation CreateRelativeIndentBlockOperation(SyntaxToken baseToken, SyntaxToken startToken, SyntaxToken endToken, int indentationDelta, IndentBlockOption option)
{
var span = CommonFormattingHelpers.GetSpanIncludingTrailingAndLeadingTriviaOfAdjacentTokens(startToken, endToken);
return(CreateRelativeIndentBlockOperation(baseToken, startToken, endToken, span, indentationDelta, option));
}