Ooui-tws-port/Ooui/Platform.cs

151 lines
5.8 KiB
C#

using System;
using System.Diagnostics;
using System.Reflection;
using System.Linq;
namespace Ooui
{
static class Platform
{
static readonly Assembly iosAssembly;
static readonly Type iosUIViewControllerType;
static readonly Type iosUIApplicationType;
static readonly Type iosUIWebViewType;
static readonly Type iosNSUrl;
static readonly Type iosNSUrlRequest;
static readonly Assembly androidAssembly;
static readonly Type androidActivityType;
static readonly Type androidWebViewType;
static Platform ()
{
var asms = AppDomain.CurrentDomain.GetAssemblies ().ToDictionary (
x => x.GetName ().Name);
asms.TryGetValue ("Xamarin.iOS", out iosAssembly);
if (iosAssembly != null) {
iosUIViewControllerType = iosAssembly.GetType ("UIKit.UIViewController");
iosUIApplicationType = iosAssembly.GetType ("UIKit.UIApplication");
iosUIWebViewType = iosAssembly.GetType ("UIKit.UIWebView");
iosNSUrl = iosAssembly.GetType ("Foundation.NSUrl");
iosNSUrlRequest = iosAssembly.GetType ("Foundation.NSUrlRequest");
}
asms.TryGetValue ("Mono.Android", out androidAssembly);
if (androidAssembly != null) {
androidActivityType = androidAssembly.GetType ("Android.App.Activity");
androidWebViewType = androidAssembly.GetType ("Android.Webkit.WebView");
}
}
public static void OpenBrowser (string url, object presenter)
{
if (iosAssembly != null) {
OpenBrowserOniOS (url, presenter);
}
else if (androidAssembly != null) {
OpenBrowserOnAndroid (url, presenter);
}
else {
StartBrowserProcess (url);
}
}
static void OpenBrowserOnAndroid (string url, object presenter)
{
var presenterType = GetObjectType (presenter);
object presenterWebView = null;
if (presenter != null && androidWebViewType.IsAssignableFrom (presenterType)) {
presenterWebView = presenter;
}
if (presenterWebView == null) {
throw new ArgumentException ("Presenter must be a WebView", nameof (presenter));
}
var m = androidWebViewType.GetMethod ("LoadUrl", BindingFlags.Public | BindingFlags.Instance, null, CallingConventions.Any, new Type[] { typeof (string) }, null);
m.Invoke (presenterWebView, new object[] { url });
}
static void OpenBrowserOniOS (string url, object presenter)
{
var presenterType = GetObjectType (presenter);
//
// Find a presenter view controller
// 1. Try the given presenter
// 2. Find the key window vc
// 3. Create a window?
//
object presenterViewController = null;
if (presenter != null && iosUIViewControllerType.IsAssignableFrom (presenterType)) {
presenterViewController = presenter;
}
if (presenterViewController == null) {
var app = iosUIApplicationType.GetProperty ("SharedApplication").GetValue (null, null);
var window = iosUIApplicationType.GetProperty ("KeyWindow").GetValue (app, null);
if (window != null) {
var rvc = window.GetType ().GetProperty ("RootViewController").GetValue (window, null);
if (rvc != null) {
var pvc = rvc.GetType ().GetProperty ("PresentedViewController").GetValue (rvc, null);
presenterViewController = pvc ?? rvc;
}
}
}
if (presenterViewController == null) {
throw new InvalidOperationException ("Cannot find a view controller from which to present");
}
//
// Create the browser
//
var browserVC = Activator.CreateInstance (iosUIViewControllerType);
var browserV = Activator.CreateInstance (iosUIWebViewType);
var nsUrl = iosNSUrl.GetMethod ("FromString").Invoke (null, new object[] { url });
var nsUrlRequest = iosNSUrlRequest.GetMethod ("FromUrl").Invoke (null, new object[] { nsUrl });
iosUIWebViewType.GetMethod ("LoadRequest").Invoke (browserV, new object[] { nsUrlRequest });
iosUIViewControllerType.GetProperty ("View").SetValue (browserVC, browserV, null);
var m = iosUIViewControllerType.GetMethod ("PresentViewController");
// Console.WriteLine (presenterViewController);
// Console.WriteLine (browserVC);
m.Invoke (presenterViewController, new object[] { browserVC, false, null });
}
static Type GetObjectType (object o)
{
var t = typeof (object);
if (o is IReflectableType rt) {
t = rt.GetTypeInfo ().AsType ();
}
else if (o != null) {
t = o.GetType ();
}
return t;
}
static void StartBrowserProcess (string url)
{
// var vs = Environment.GetEnvironmentVariables ();
// foreach (System.Collections.DictionaryEntry kv in vs) {
// System.Console.WriteLine($"K={kv.Key}, V={kv.Value}");
// }
// Console.WriteLine ($"Process.Start {cmd} {args}");
if (Environment.OSVersion.Platform == PlatformID.Unix) {
Process.Start ("open", url);
}
else {
Process.Start (new ProcessStartInfo (url) { UseShellExecute = true });
}
}
}
}