Xamarin.forms: Span Gesture recognizer dosen't work on righ to left text(RTL)

[mabdollahiasl]

when we add rtl text on a label with some spans, tap gesture recognizer doesn't work.

Steps to Reproduce

   Label lblTest = new Label();
            Command command = new Command(OnTap);
            FormattedString formatted = new FormattedString();
            var a=new Span()
            {
                Text="سلام دوست "

            };
            a.GestureRecognizers.Add(new TapGestureRecognizer
            {
                Command=command // never fired 
            });
           var b= new Span()
            {
                Text = " خوب من",

            };

            formatted.Spans.Add(a);
            formatted.Spans.Add(b);


            lblTest.FormattedText = formatted;

Expected Behavior

Tapped Command fired.

Actual Behavior

nothing happened,

Basic Information

• Version with issue:3.4

  • IDE: visual studio 2017

[kingces95]

Yep. LTR works. RTL no works.

App71.zip

[LineInHidden]

Please fix this issue as my application will be nothing without this feature. It happens on iOS and UWP as well.

[Monah84]

Same issue occurred with me. I split a text into three spans, first normal Arabic text, second normal text with blue color, and the third was normal. When tapping the blue text, the command executes as if I tapped on the first span. Is there any workaround for this problem?

[spozdbpc]

Any update on this issue?

[Monah84]

@spozdbpc
My problem was that I need a hyperlinks. so, I made a workaround to solve this problem by creating a custom renderers

PCL
public class LinkLabel : Label {}

iOS

 public class LinkLabelRenderer : ViewRenderer<LinkLabel, UITextView>
    {
        protected override void OnElementChanged(ElementChangedEventArgs<LinkLabel> e)
        {
            if (e.NewElement != null)
            {
                if (Control == null)
                {
                    SetNativeControl(new UITextView());
                }

                UpdateText();
            }

            base.OnElementChanged(e);
        }

        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);

            if (e.PropertyName == nameof(LinkLabel.Text))
            {
                UpdateText();
            }
        }

        void UpdateText()
        {
            if (string.IsNullOrWhiteSpace(Element?.Text))
            {
                Control.Text = string.Empty;
                return;
            }
            var text = $"<style>body{{font-size:{Element.FontSize}px;}}</style>" + Element.Text;
            NSError error = null;
            Control.BackgroundColor = Color.Transparent.ToUIColor();
            Control.AttributedText = new NSAttributedString(NSData.FromString(text, NSStringEncoding.Unicode),
                                                            new NSAttributedStringDocumentAttributes { DocumentType = NSDocumentType.HTML },
                                                            ref error);
            Control.Editable = false;
            Control.ScrollEnabled = false;
            Control.ShouldInteractWithUrl += delegate { return true; };
        }
    }

Android

public class LinkLabelRenderer : LabelRenderer
    {
        public LinkLabelRenderer(Context context)
            : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
        {
            base.OnElementChanged(e);

            if (Control != null && e.NewElement != null)
            {
                UpdateText();
            }
        }

        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);

            if (e.PropertyName == nameof(LinkLabel.Text))
            {
                UpdateText();
            }
        }

        void UpdateText()
        {
            if (string.IsNullOrWhiteSpace(Element?.Text))
            {
                Control.Text = string.Empty;
                return;
            }

            Control.TextFormatted = Html.FromHtml(Element.Text, FromHtmlOptions.ModeCompact);
            Control.MovementMethod = Android.Text.Method.LinkMovementMethod.Instance;
        }
    }

Hope this helps you

[noormahdi]

Any update on this issue?

[AbuMandour]

any update? , I this is second app I face this problem and do a stupid workaround and didn't get what I want, please any help