private void AdjustOverlayForScroll()
{
if (_overlayView == null || _anchorNode == null ||
AccessibilityHelpers.IsAutofillServicePromptVisible(Windows))
{
CancelOverlayPrompt();
return;
}
var root = RootInActiveWindow;
IEnumerable <AccessibilityWindowInfo> windows = null;
if (Build.VERSION.SdkInt > BuildVersionCodes.Kitkat)
{
windows = Windows;
}
var anchorPosition = AccessibilityHelpers.GetOverlayAnchorPosition(this, _anchorNode, root,
windows, _overlayViewHeight, _isOverlayAboveAnchor);
if (anchorPosition == null)
{
CancelOverlayPrompt();
return;
}
else if (anchorPosition.X == -1 && anchorPosition.Y == -1)
{
if (_overlayView.Visibility != ViewStates.Gone)
{
_overlayView.Visibility = ViewStates.Gone;
System.Diagnostics.Debug.WriteLine(">>> Accessibility Overlay View Hidden");
}
return;
}
else if (anchorPosition.X == -1)
{
_isOverlayAboveAnchor = false;
System.Diagnostics.Debug.WriteLine(">>> Accessibility Overlay View Below Anchor");
return;
}
else if (anchorPosition.Y == -1)
{
_isOverlayAboveAnchor = true;
System.Diagnostics.Debug.WriteLine(">>> Accessibility Overlay View Above Anchor");
return;
}
else if (anchorPosition.X == _lastAnchorX && anchorPosition.Y == _lastAnchorY)
{
if (_overlayView.Visibility != ViewStates.Visible)
{
_overlayView.Visibility = ViewStates.Visible;
}
return;
}
var layoutParams = AccessibilityHelpers.GetOverlayLayoutParams();
layoutParams.X = anchorPosition.X;
layoutParams.Y = anchorPosition.Y;
_lastAnchorX = anchorPosition.X;
_lastAnchorY = anchorPosition.Y;
_windowManager.UpdateViewLayout(_overlayView, layoutParams);
if (_overlayView.Visibility != ViewStates.Visible)
{
_overlayView.Visibility = ViewStates.Visible;
}
System.Diagnostics.Debug.WriteLine(">>> Accessibility Overlay View Updated to X:{0} Y:{1}",
layoutParams.X, layoutParams.Y);
}
private void OverlayPromptToAutofill(AccessibilityNodeInfo root, AccessibilityEvent e)
{
if (Java.Lang.JavaSystem.CurrentTimeMillis() - _lastAutoFillTime < 1000 ||
AccessibilityHelpers.IsAutofillServicePromptVisible(Windows))
{
return;
}
if (!AccessibilityHelpers.OverlayPermitted())
{
if (!AccessibilityHelpers.IsAutofillTileAdded)
{
// The user has the option of only using the autofill tile and leaving the overlay permission
// disabled, so only show this toast if they're using accessibility without overlay permission and
// have _not_ added the autofill tile
System.Diagnostics.Debug.WriteLine(">>> Overlay Permission not granted");
Toast.MakeText(this, AppResources.AccessibilityOverlayPermissionAlert, ToastLength.Long).Show();
}
return;
}
if (_overlayView != null || _anchorNode != null || _overlayAnchorObserverRunning)
{
CancelOverlayPrompt();
}
var uri = AccessibilityHelpers.GetUri(root);
var fillable = !string.IsNullOrWhiteSpace(uri);
if (fillable)
{
if (_blacklistedUris != null && _blacklistedUris.Any())
{
if (Uri.TryCreate(uri, UriKind.Absolute, out var parsedUri) && parsedUri.Scheme.StartsWith("http"))
{
fillable = !_blacklistedUris.Contains(
string.Format("{0}://{1}", parsedUri.Scheme, parsedUri.Host));
}
else
{
fillable = !_blacklistedUris.Contains(uri);
}
}
}
if (!fillable)
{
return;
}
var intent = new Intent(this, typeof(AccessibilityActivity));
intent.PutExtra("uri", uri);
intent.SetFlags(ActivityFlags.NewTask | ActivityFlags.SingleTop | ActivityFlags.ClearTop);
_overlayView = AccessibilityHelpers.GetOverlayView(this);
_overlayView.Measure(View.MeasureSpec.MakeMeasureSpec(0, 0),
View.MeasureSpec.MakeMeasureSpec(0, 0));
_overlayViewHeight = _overlayView.MeasuredHeight;
_overlayView.Click += (sender, eventArgs) =>
{
CancelOverlayPrompt();
StartActivity(intent);
};
var layoutParams = AccessibilityHelpers.GetOverlayLayoutParams();
var anchorPosition = AccessibilityHelpers.GetOverlayAnchorPosition(this, e.Source,
_overlayViewHeight, _isOverlayAboveAnchor);
layoutParams.X = anchorPosition.X;
layoutParams.Y = anchorPosition.Y;
if (_windowManager == null)
{
_windowManager = GetSystemService(WindowService).JavaCast <IWindowManager>();
}
_anchorNode = e.Source;
_lastAnchorX = anchorPosition.X;
_lastAnchorY = anchorPosition.Y;
_windowManager.AddView(_overlayView, layoutParams);
System.Diagnostics.Debug.WriteLine(">>> Accessibility Overlay View Added at X:{0} Y:{1}",
layoutParams.X, layoutParams.Y);
StartOverlayAnchorObserver();
}