// Internal for testing
internal static bool TryCreateIndentationContext(int changePosition, int changeLength, string finalText, VisualStudioDocumentTracker documentTracker, out BraceIndentationContext context)
{
var focusedTextView = documentTracker.GetFocusedTextView();
if (focusedTextView != null && ParserHelpers.IsNewLine(finalText))
{
var currentSnapshot = documentTracker.TextBuffer.CurrentSnapshot;
var preChangeLineSnapshot = currentSnapshot.GetLineFromPosition(changePosition);
// Handle the case where the \n comes through separately from the \r and the position
// on the line is beyond what the GetText call above gives back.
var linePosition = Math.Min(preChangeLineSnapshot.Length, changePosition - preChangeLineSnapshot.Start) - 1;
if (AfterOpeningBrace(linePosition, preChangeLineSnapshot))
{
var afterChangePosition = changePosition + changeLength;
var afterChangeLineSnapshot = currentSnapshot.GetLineFromPosition(afterChangePosition);
var afterChangeLinePosition = afterChangePosition - afterChangeLineSnapshot.Start;
if (BeforeClosingBrace(afterChangeLinePosition, afterChangeLineSnapshot))
{
context = new BraceIndentationContext(focusedTextView, changePosition);
return(true);
}
}
}
context = null;
return(false);
}
// Internal for testing
internal void TextBuffer_OnChanged(object sender, TextContentChangedEventArgs args)
{
_dispatcher.AssertForegroundThread();
if (!args.TextChangeOccurred(out var changeInformation))
{
return;
}
var newText = changeInformation.newText;
if (TryCreateIndentationContext(changeInformation.firstChange.NewPosition, newText.Length, newText, _documentTracker, out var context))
{
_context = context;
}
}
private void TextBuffer_OnPostChanged(object sender, EventArgs e)
{
_dispatcher.AssertForegroundThread();
var context = _context;
_context = null;
if (context != null)
{
// Save the current caret position
var textView = context.FocusedTextView;
var caret = textView.Caret.Position.BufferPosition;
var textViewBuffer = textView.TextBuffer;
var indent = CalculateIndent(textViewBuffer, context.ChangePosition);
// Current state, pipe is cursor:
// @{
// |}
// Insert the completion text, i.e. "\r\n "
InsertIndent(caret.Position, indent, textViewBuffer);
// @{
//
// |}
// Place the caret inbetween the braces (before our indent).
RestoreCaretTo(caret.Position, textView);
// @{
// |
// }
// For Razor metacode cases the editor's smart indent wont kick in automatically.
TriggerSmartIndent(textView);
// @{
// |
// }
}
}
// Internal for testing
internal void TextBuffer_OnChanged(object sender, TextContentChangedEventArgs args)
{
_dispatcher.AssertForegroundThread();
if (!args.TextChangeOccurred(out var changeInformation))
{
return;
}
var newText = changeInformation.newText;
if (!_codeDocumentProvider.TryGetFromBuffer(_documentTracker.TextBuffer, out var codeDocument))
{
// Parse not available.
return;
}
var syntaxTree = codeDocument.GetSyntaxTree();
if (TryCreateIndentationContext(changeInformation.firstChange.NewPosition, newText.Length, newText, syntaxTree, _documentTracker, out var context))
{
_context = context;
}
}
