internal static void ApplyNewTree(TextEditor editor, int startOffset, bool exact, TextSpan span, Microsoft.CodeAnalysis.SyntaxTree syntaxTree, Microsoft.CodeAnalysis.SyntaxTree newTree)
{
var caretOffset = editor.CaretOffset;
var caretEndOffset = caretOffset;
using (var undo = editor.OpenUndoGroup()) {
int delta = 0;
foreach (var change in newTree.GetChanges(syntaxTree))
{
if (!exact && change.Span.Start >= caretOffset)
{
continue;
}
if (exact && !span.Contains(change.Span.Start))
{
continue;
}
var newText = change.NewText;
var length = change.Span.Length;
var changeEnd = delta + change.Span.End - 1;
if (changeEnd < editor.Length && changeEnd >= 0 && editor.GetCharAt(changeEnd) == '\r')
{
length--;
}
var replaceOffset = delta + change.Span.Start;
editor.ReplaceText(replaceOffset, length, newText);
delta = delta - length + newText.Length;
if (change.Span.Start < caretOffset)
{
if (change.Span.End < caretOffset)
{
caretEndOffset += newText.Length - length;
}
else
{
caretEndOffset = replaceOffset;
}
}
}
}
if (startOffset < caretOffset)
{
if (0 <= caretEndOffset && caretEndOffset < editor.Length)
{
editor.CaretOffset = caretEndOffset;
}
if (editor.CaretColumn == 1)
{
if (editor.CaretLine > 1 && editor.GetLine(editor.CaretLine - 1).Length == 0)
{
editor.CaretLine--;
}
editor.CaretColumn = editor.GetVirtualIndentationColumn(editor.CaretLine);
}
}
}
internal static void ApplyNewTree(TextEditor editor, int startOffset, bool exact, TextSpan span, Microsoft.CodeAnalysis.SyntaxTree syntaxTree, Microsoft.CodeAnalysis.SyntaxTree newTree)
{
editor.ApplyTextChanges(newTree.GetChanges(syntaxTree));
}
