// Main thread
public IDisposable BindTo(IntPtr unoHostHwnd, IntPtr controlHwnd, IControl control, IObservable <Ratio <Pixels, Points> > density)
{
var element = control.NativeHandle as FrameworkElement;
if (element == null)
{
throw new InvalidOperationException("Can't bind to an empty control");
}
var frames = DataBinding
.ObservableFromNativeEvent <object>(element, "LayoutUpdated")
.StartWith(new object())
.Select(_ =>
{
var r = element.GetScreenRect();
return(new ClipResult
{
BoundsInIntersection = r.Item1.RelativeTo(r.Item2.Position),
IntersectionInParent = r.Item2
});
});
WinApi.SetWindowParent(unoHostHwnd, Handle);
WinApi.SetWindowParent(Handle, controlHwnd);
WinApi.ShowWindow(unoHostHwnd, WinApi.ShowWindowEnum.ShowNoActivate);
var flags = WinApi.SWP_NOZORDER | WinApi.SWP_NOACTIVATE;
return(Disposable.Combine
(
Disposable.Create(() => Invoke(new Action(Hide))),
frames.BufferPrevious().WithLatestFromBuffered(density, Tuple.Create).Subscribe(
(f, d) => Fusion.Application.MainThread.Schedule(() =>
{
WinApi.SetWindowPos(
Handle,
f.Current.IntersectionInParent.Position * d, // Bug in Window chrome, where position must be set once more, even though it has been set.
f.ChangesTo(fr => fr.IntersectionInParent.Size * d),
f.Current.IntersectionInParent.Size.HasZeroArea(),
flags);
WinApi.SetWindowPos(
unoHostHwnd,
f.ChangesTo(fr => fr.BoundsInIntersection.Position * d),
f.ChangesTo(fr => fr.BoundsInIntersection.Size * d),
f.Current.BoundsInIntersection.Size.HasZeroArea(),
flags | WinApi.SWP_ASYNCWINDOWPOS);
}))
));
}
public IUnoHostControl Create(
AbsoluteFilePath assemblyPath,
Command onFocused,
Menu contextMenu,
AbsoluteFilePath userDataPath,
Action <IUnoHostControl> initialize,
Action <OpenGlVersion> gotVersion,
params string[] arguments)
{
UnoHostProcess.Application = ExternalApplication.FromNativeExe(typeof(UnoHostControlFactory).Assembly.GetCodeBaseFilePath());
var dispatcher = Fusion.Application.MainThread;
var messagesToHost = new Subject <IBinaryMessage>();
var unoHost = UnoHostProcess.Spawn(assemblyPath, messagesToHost, userDataPath, /*TODO*/ new List <string>());
unoHost.Process.Subscribe(process => new Job().AddProcess(process.Id));
var windowCreated = unoHost.Receieve(WindowCreatedMessage.TryParse).Replay(1);
windowCreated.Connect();
var control = new UnoHostControlImplementation()
{
_disposable = unoHost,
Messages = unoHost.Messages,
MessagesTo = messagesToHost,
Process = unoHost.Process,
};
control.Control =
Fusion.Control.Create(location =>
{
var dummyControl = Shapes.Rectangle();
dummyControl.Mount(location);
var dummyElement = (FrameworkElement)dummyControl.NativeHandle;
location.IsRooted
.ObserveOn(dispatcher)
.SubscribeUsing(rooted => rooted
? ContextMenuImplementation.AddMenuTemporarily(dummyElement, contextMenu, dispatcher)
: Disposable.Empty);
var mainWindow = DataBinding
.ObservableFromNativeEvent <object>(dummyElement, "LayoutUpdated")
.StartWith(new object())
.Select(_ =>
{
var hwndSource1 = PresentationSource.FromVisual(dummyElement);
if (hwndSource1 == null)
{
return(Optional.None <System.Windows.Window>());
}
var window = hwndSource1.RootVisual as System.Windows.Window;
if (window == null)
{
return(Optional.None <System.Windows.Window>());
}
return(Optional.Some(window));
})
.DistinctUntilChanged()
.NotNone()
.Replay(1).RefCount();
var mainWindowHandle = mainWindow.Select(currentWindow =>
{
var hwndSource = (HwndSource)PresentationSource.FromVisual(currentWindow);
if (hwndSource == null)
{
return(Optional.None());
}
return(Optional.Some(hwndSource.Handle));
})
.NotNone()
.Replay(1);
mainWindowHandle.Connect();
var focused = unoHost.Receieve(WindowFocusMessage.TryParse)
.Where(focusState => focusState == FocusState.Focused);
focused.CombineLatest(mainWindowHandle, (a, b) => b)
.ObserveOn(dispatcher)
.Subscribe(t => WinApi.ShowWindow(t, WinApi.ShowWindowEnum.ShowNoActivate));
unoHost.Receieve(WindowContextMenuMessage.TryParse)
.ObserveOn(dispatcher)
.Subscribe(t => dummyElement.ContextMenu.IsOpen = t);
unoHost.Receieve(WindowMouseScrollMessage.TryParse)
.ObserveOn(dispatcher)
.Subscribe(deltaWheel =>
{
var delta = deltaWheel;
var routedEvent = Mouse.MouseWheelEvent;
dummyElement.RaiseEvent(
new MouseWheelEventArgs(
Mouse.PrimaryDevice,
Environment.TickCount, delta)
{
RoutedEvent = routedEvent,
Source = dummyElement
});
});
// This is a fix for a commit that "fixed" handling the shortcuts, but broke just
// plain typing in a TextInput.
// See https://github.com/fusetools/Fuse/issues/3342
// and https://github.com/fusetools/Fuse/issues/3887
// Workaround to fix a problem with handling shortcut keys in the application while
// the viewport has focus and the user is typing in an TextInput in the app.
// We have give the main window focus to handle the shortcut keys, but then
// the viewport will lose focus. Current work around is to only do this when
// the user presses down Ctrl.
unoHost.Receieve(WindowKeyDown.TryParse)
.WithLatestFromBuffered(mainWindow, (t, w) => new { Keys = t, Window = w })
.ObserveOn(dispatcher)
.Subscribe(t =>
{
var modifiers = System.Windows.Input.Keyboard.PrimaryDevice.Modifiers;
var alt = modifiers.HasFlag(System.Windows.Input.ModifierKeys.Alt);
// Activate the main window if the Ctrl-key was pressed.
// Ctrl + Alt means AltGr which we want to keep in the Uno host e.g. for the '@' key on Nordic keyboards.
if (t.Keys == Keys.ControlKey && !alt)
{
t.Window.Activate();
}
});
focused
.WithLatestFromBuffered(onFocused.Execute.ConnectWhile(dummyControl.IsRooted), (_, c) => c)
.Subscribe(c => c());
var overlayForm = new OverlayForm();
Observable
.CombineLatest(windowCreated, mainWindowHandle,
(viewportHwnd, mainHwnd) => new
{
ViewportHwnd = viewportHwnd,
MainHwnd = mainHwnd,
})
.ObserveOn(dispatcher)
.SubscribeUsing(t =>
overlayForm.BindTo(t.ViewportHwnd, t.MainHwnd, dummyControl, dummyElement.GetDpi()));
unoHost.Messages
.SelectMany(m => m.TryParse(Ready.MessageType, Ready.ReadDataFrom))
.Take(1)
.Subscribe(_ => initialize(control));
unoHost.Messages
.SelectSome(OpenGlVersionMessage.TryParse)
.Subscribe(gotVersion);
unoHost.Messages.Connect();
return(dummyElement);
});
return(control);
}