private void showAutoCompleteList()
{
hideAutoCompleteList();
TextUtils.WordInfo currentWordInfo = getCurrentWord(textBoxAutoComplete);
if (!currentWordInfo.IsValid || currentWordInfo.Word.Length < 2)
{
return;
}
bool doesWordContainWord(string container, string containee) =>
container.ToLower().Contains(containee.ToLower());
object[] objects = _users?
.Where(user => doesWordContainWord(user.Name, currentWordInfo.Word) ||
doesWordContainWord(user.Username, currentWordInfo.Word))
.Cast <object>()
.ToArray() ?? Array.Empty <object>();
if (objects.Length == 0)
{
return;
}
ListBox listBox = createListBox();
fillListBox(listBox, objects);
resizeListBox(listBox, objects);
createPopupWindow(listBox);
showPopupWindow();
_listBoxAutoComplete = listBox;
Focus();
}
private void applyAutoCompleteListSelection()
{
TextUtils.WordInfo currentWordInfo = getCurrentWord(textBoxAutoComplete);
if (_listBoxAutoComplete.SelectedItem == null || !currentWordInfo.IsValid)
{
return;
}
string substitutionWord = ((User)(_listBoxAutoComplete.SelectedItem)).Username;
textBoxAutoComplete.Text = TextUtils.ReplaceWord(textBoxAutoComplete.Text, currentWordInfo, substitutionWord);
textBoxAutoComplete.SelectionStart = currentWordInfo.Start + substitutionWord.Length;
}
private void showPopupWindow()
{
TextUtils.WordInfo currentWordInfo = getCurrentWord(textBoxAutoComplete);
if (!currentWordInfo.IsValid)
{
return;
}
Point position = textBoxAutoComplete.GetPositionFromCharIndex(currentWordInfo.Start);
Point pt = PointToScreen(new Point(position.X, position.Y + textBoxAutoComplete.Height));
_popupWindow.Show(pt);
}
/// <summary>
/// Extends functionality.
/// Trims result of TextUtils.GetCurrentWord():
/// - removes all non-letter characters before '@' character.
/// - removes all non-letter characters after a series of letter characters (after '@')
/// e.g. "[@abcd]" converted to "abcd"
/// The following strings are considered incorrect:
/// - strings without '@'
/// - strings with letter-characters prior to '@'
/// - strings where there is a non-letter character next to '@'
/// </summary>
private TextUtils.WordInfo getCurrentWord(RichTextBox txt)
{
int selectionStartPosition = txt.SelectionStart - 1;
TextUtils.WordInfo word = TextUtils.GetCurrentWord(txt.Text, selectionStartPosition);
if (!word.IsValid)
{
return(word);
}
int?firstLabelPrefixPosition = null;
int?firstLetterPosition = null;
int?firstNonLetterAfterLabelPrefixPosition = null;
for (int iPosition = 0; iPosition < word.Word.Length; ++iPosition)
{
char currentChar = word.Word[iPosition];
if (Char.IsLetter(currentChar))
{
if (!firstLetterPosition.HasValue)
{
firstLetterPosition = iPosition;
}
}
else if (currentChar == GitLabLabelPrefixChar)
{
if (!firstLabelPrefixPosition.HasValue)
{
firstLabelPrefixPosition = iPosition;
}
}
else if (!firstNonLetterAfterLabelPrefixPosition.HasValue && firstLabelPrefixPosition.HasValue)
{
firstNonLetterAfterLabelPrefixPosition = iPosition;
}
}
if (!firstLetterPosition.HasValue ||
!firstLabelPrefixPosition.HasValue ||
firstLetterPosition.Value < firstLabelPrefixPosition.Value)
{
return(TextUtils.WordInfo.Invalid);
}
int firstCharAfterLabelPrefixPosition = firstLabelPrefixPosition.Value + 1;
int textLength = firstNonLetterAfterLabelPrefixPosition.HasValue
? firstNonLetterAfterLabelPrefixPosition.Value - firstCharAfterLabelPrefixPosition
: word.Word.Length - firstCharAfterLabelPrefixPosition;
if (textLength == 0)
{
return(TextUtils.WordInfo.Invalid);
}
int startPosition = word.Start + firstCharAfterLabelPrefixPosition;
string trimmedWord = word.Word.Substring(firstCharAfterLabelPrefixPosition, textLength);
if (selectionStartPosition < startPosition || selectionStartPosition >= startPosition + trimmedWord.Length)
{
return(TextUtils.WordInfo.Invalid);
}
return(new TextUtils.WordInfo(startPosition, trimmedWord));
}
