public static void UpdateSelectionLength(this UITextView textView, IEditor editor)
{
var selectedTextRange = textView.SelectedTextRange;
if (selectedTextRange == null)
{
return;
}
if (textView.GetOffsetFromPosition(selectedTextRange.Start, selectedTextRange.End) != editor.SelectionLength)
{
UpdateCursorSelection(textView, editor);
}
}
public static void UpdateCursorPosition(this UITextView textView, IEditor editor)
{
var selectedTextRange = textView.SelectedTextRange;
if (selectedTextRange == null)
{
return;
}
if (textView.GetOffsetFromPosition(textView.BeginningOfDocument, selectedTextRange.Start) != editor.CursorPosition)
{
UpdateCursorSelection(textView, editor);
}
}
static UITextPosition GetSelectionStart(UITextView textView, IEditor editor, out int startOffset)
{
int cursorPosition = editor.CursorPosition;
UITextPosition start = textView.GetPosition(textView.BeginningOfDocument, cursorPosition) ?? textView.EndOfDocument;
startOffset = Math.Max(0, (int)textView.GetOffsetFromPosition(textView.BeginningOfDocument, start));
if (startOffset != cursorPosition)
{
editor.CursorPosition = startOffset;
}
return(start);
}
static UITextPosition GetSelectionEnd(UITextView textView, IEditor editor, UITextPosition start, int startOffset)
{
int selectionLength = editor.SelectionLength;
int textFieldLength = textView.Text == null ? 0 : textView.Text.Length;
// Get the desired range in respect to the actual length of the text we are working with
UITextPosition end = textView.GetPosition(start, Math.Min(textFieldLength - editor.CursorPosition, selectionLength)) ?? start;
int endOffset = Math.Max(startOffset, (int)textView.GetOffsetFromPosition(textView.BeginningOfDocument, end));
int newSelectionLength = Math.Max(0, endOffset - startOffset);
if (newSelectionLength != selectionLength)
{
editor.SelectionLength = newSelectionLength;
}
return(end);
}
private static void HandleTap(UITapGestureRecognizer gestureRecognizer, UITextView textView, Dictionary <Source, FinalSourcePosition> sourcePositions, IInteractiveSourceAction action)
{
var point = gestureRecognizer.LocationInView(textView);
point.Y += textView.ContentOffset.Y;
var tapPos = textView.GetClosestPositionToPoint(point);
// if a source link has been tapped: show the reference
nint clickedPos = textView.GetOffsetFromPosition(textView.BeginningOfDocument, tapPos);
int pos = Convert.ToInt32(clickedPos);
var clickedSource = sourcePositions.SingleOrDefault(x => x.Value.Start <= pos && pos <= x.Value.End).Key;
if (clickedSource != null)
{
action.Display(clickedSource);
}
}
private void Tap(UITapGestureRecognizer tap)
{
var location = tap.LocationInView(Control);
// Fale UseTextView
var fakeTextViwe = new UITextView(Control.Frame);
fakeTextViwe.TextContainer.LineFragmentPadding = 0;
fakeTextViwe.TextContainerInset = UIEdgeInsets.Zero;
fakeTextViwe.AttributedText = Control.AttributedText;
var selectedPositon = fakeTextViwe.GetClosestPositionToPoint(location);
var position = (int)fakeTextViwe.GetOffsetFromPosition(fakeTextViwe.BeginningOfDocument, selectedPositon);
var label = Element as Shared.LinkerLabel;
if (label.MatchWords.Any(x => x.StartPosition <= position && x.EndPositon >= position))
{
var word = label.MatchWords.First(x => x.StartPosition <= position && x.EndPositon >= position);
if (label.Command?.CanExecute(word.Word) == true)
{
label.Command.Execute(word.Word);
}
}
}
protected void OnTapUrl(UIGestureRecognizer tap)
{
var location = tap.LocationInView(Control);
var textView = new UITextView(Control.Frame);
textView.TextContainer.LineFragmentPadding = 0;
textView.TextContainerInset = UIEdgeInsets.Zero;
textView.AttributedText = Control.AttributedText;
var position = textView.GetOffsetFromPosition(
textView.BeginningOfDocument,
textView.GetClosestPositionToPoint(location)
);
var url = this.Matches.FirstOrDefault(m =>
m.Index <= position && position <= (m.Index + m.Length)
);
if (url != null)
{
UIApplication.SharedApplication.OpenUrl(new Uri(url.Value));
}
}
async public override void Changed (UITextView textView)
{
string text = StringUtils.TrimWhiteSpaceAndNewLine (textView.Text);
UpdateCharacterCount(text);
Validate ();
if (SuggestionsCollectionView != null) {
if (text.Length <= 2 || !text.Contains ("@")) {
SuggestionsCollectionView.Hidden = true;
return;
}
int cursorPositionEarly = (int)textView.GetOffsetFromPosition (textView.BeginningOfDocument, textView.SelectedTextRange.Start);
if (cursorPositionEarly <= 0)
{
return;
}
string charToTest = textView.Text.Substring (cursorPositionEarly - 1, 1);
if (charToTest != "@" && charToTest != " ") {
string beforeTextEarly = textView.Text.Substring (0, cursorPositionEarly);
string strippedToLastSpaceOnward = beforeTextEarly;
if (strippedToLastSpaceOnward.IndexOf ("") > -1 && strippedToLastSpaceOnward.Length > 2) {
strippedToLastSpaceOnward = strippedToLastSpaceOnward.Substring (strippedToLastSpaceOnward.LastIndexOf (" ") + 1);
}
if (strippedToLastSpaceOnward.Length > 1 && strippedToLastSpaceOnward.Substring (0, 1) == "@") {
try
{
List<User> users = await TenServices.SearchFollowingUsers(strippedToLastSpaceOnward.Substring(1));
SuggestionsCollectionViewDelegate del = new SuggestionsCollectionViewDelegate();
del.ItemSelectedAction += delegate (int index)
{
int cursorPosition = (int)textView.GetOffsetFromPosition(textView.BeginningOfDocument, textView.SelectedTextRange.Start);
string currentText = textView.Text;
string beforeText = currentText.Substring(0, cursorPosition);
beforeText = beforeText.Substring(0, beforeText.LastIndexOf('@'));
string afterText = currentText.Substring(cursorPosition);
currentText = currentText.Substring(0, cursorPosition);
textView.Text = beforeText + "@" + users[index].username + " " + afterText;
SuggestionsCollectionView.Hidden = true;
UpdateCharacterCount(textView.Text);
};
SuggestionsCollectionView.Delegate = del;
SuggestionsCollectionView.DataSource = new SuggestionsCollectionViewDataSource(users);
SuggestionsCollectionView.Hidden = false;
}
catch (RESTError e)
{
Console.WriteLine(e.Message);
}
finally
{
UpdateCharacterCount(text);
}
} else {
SuggestionsCollectionView.Hidden = true;
}
}
UpdateCharacterCount(text);
}
}
