private bool TryCommitSuggestionIntoDocument(ITextRange range, string displayText, Guid id, ITextCharacterFormat format, bool addTrailingSpace = true)
{
// We don't want to set text when the display text doesn't change since it may lead to unexpected caret move.
range.GetText(TextGetOptions.NoHidden, out var existingText);
if (existingText != displayText)
{
range.SetText(TextSetOptions.Unhide, displayText);
}
var formatBefore = range.CharacterFormat.GetClone();
range.CharacterFormat.SetClone(format);
PadRange(range, formatBefore);
range.Link = $"\"{id}\"";
// In some rare case, setting Link can fail. Only observed when interacting with Undo/Redo feature.
if (range.Link != $"\"{id}\"")
{
range.Delete(TextRangeUnit.Story, -1);
return(false);
}
if (addTrailingSpace)
{
var clone = range.GetClone();
clone.Collapse(false);
clone.SetText(TextSetOptions.Unhide, " ");
clone.Collapse(false);
TextDocument.Selection.SetRange(clone.EndPosition, clone.EndPosition);
}
return(true);
}
private void FormatSingleCharacter(ref string text, int start)
{
Debug.Assert(start > 0);
Debug.Assert(start < text.Length);
char c = text[start - 1];
if (c == Characters.LoopStart && _SyntaxValidationResult.IsSuccessOrEmptyScript)
{
int depth = text.CalculateIndentationDepth(start - 1);
ITextRange range = Document.GetRange(start - 1, start);
string autocomplete;
// Handle the two possible bracket formatting options. If the bracket needs
// to go on a new line, check for edge cases and then prepare the new text
// with the leading new line. Otherwise, simply replace the open bracket
// on the same line and insert the autocomplete text. Using a single replacement
// improves performance, as the color can be applied in a single pass.
if (BracketsFormattingStyle == BracketsFormattingStyle.NewLine &&
start > 1 &&
text[start - 2] != Characters.CarriageReturn)
{
autocomplete = CodeGenerator.GetBracketAutocompleteText(BracketsFormattingStyle.NewLine, depth);
}
else
{
autocomplete = CodeGenerator.GetBracketAutocompleteText(BracketsFormattingStyle.SameLine, depth);
}
// Set the autocomplete text and color it
range.SetText(TextSetOptions.None, autocomplete);
range.CharacterFormat.ForegroundColor = SyntaxHighlightTheme.GetColor(Characters.LoopStart);
// Move the selection at the end of the added line between the brackets.
// Start is the position right after the first inserted bracket, which was replaced.
// It gets shifted ahead by the length of the replacement text, minus the number of
// tabs before the closing bracket, and 3 which is the number of additional characters
// that were inserted with respect to the end: the first replaced bracket,
// the closing bracket, and the new line before the line with the last bracket.
Document.Selection.StartPosition = Document.Selection.EndPosition = start + autocomplete.Length - (depth + 3);
text = Document.GetText();
}
else if (c == Characters.CarriageReturn && _SyntaxValidationResult.IsSuccessOrEmptyScript)
{
int depth = text.CalculateIndentationDepth(start);
string autocomplete = new string(Characters.Tab, depth);
// Simply insert the tabs at the current selection, then collapse it
Document.Selection.Text = autocomplete;
Document.Selection.StartPosition = Document.Selection.EndPosition;
text = Document.GetText();
}
else
{
Document.SetRangeColor(start - 1, start, SyntaxHighlightTheme.GetColor(c));
}
}
private void ClearStyle(ITextRange range)
{
var start = Math.Min(range.StartPosition, range.EndPosition);
var end = Math.Max(range.StartPosition, range.EndPosition);
range.SetRange(start, end);
range.CharacterFormat = Document.GetDefaultCharacterFormat();
range.GetText(TextGetOptions.NoHidden, out string text);
range.SetText(TextSetOptions.Unlink, text);
range.SetRange(start, start + text.Length);
}