99 lines
3.1 KiB
C#
99 lines
3.1 KiB
C#
using System;
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using Bit.App.Controls;
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using Xamarin.Forms;
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using Xamarin.Forms.Platform.Android;
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using Android.Webkit;
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using AWebkit = Android.Webkit;
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using Java.Interop;
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using Android.Content;
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using Bit.Droid.Renderers;
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using System.ComponentModel;
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[assembly: ExportRenderer(typeof(HybridWebView), typeof(HybridWebViewRenderer))]
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namespace Bit.Droid.Renderers
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{
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public class HybridWebViewRenderer : ViewRenderer<HybridWebView, AWebkit.WebView>
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{
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private const string JSFunction = "function invokeCSharpAction(data){jsBridge.invokeAction(data);}";
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private readonly Context _context;
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public HybridWebViewRenderer(Context context)
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: base(context)
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{
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_context = context;
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}
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protected override void OnElementChanged(ElementChangedEventArgs<HybridWebView> e)
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{
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base.OnElementChanged(e);
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if (Control == null)
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{
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var webView = new AWebkit.WebView(_context);
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webView.Settings.JavaScriptEnabled = true;
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webView.SetWebViewClient(new JSWebViewClient(string.Format("javascript: {0}", JSFunction)));
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SetNativeControl(webView);
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}
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if (e.OldElement != null)
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{
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Control.RemoveJavascriptInterface("jsBridge");
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var hybridWebView = e.OldElement as HybridWebView;
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hybridWebView.Cleanup();
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}
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if (e.NewElement != null)
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{
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Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
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Control.LoadUrl(Element.Uri);
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}
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}
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protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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base.OnElementPropertyChanged(sender, e);
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if (e.PropertyName == HybridWebView.UriProperty.PropertyName)
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{
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Control.LoadUrl(Element.Uri);
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}
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}
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public class JSBridge : Java.Lang.Object
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{
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private readonly WeakReference<HybridWebViewRenderer> _hybridWebViewRenderer;
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public JSBridge(HybridWebViewRenderer hybridRenderer)
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{
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_hybridWebViewRenderer = new WeakReference<HybridWebViewRenderer>(hybridRenderer);
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}
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[JavascriptInterface]
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[Export("invokeAction")]
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public void InvokeAction(string data)
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{
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if (_hybridWebViewRenderer != null &&
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_hybridWebViewRenderer.TryGetTarget(out HybridWebViewRenderer hybridRenderer))
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{
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hybridRenderer.Element.InvokeAction(data);
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}
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}
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}
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public class JSWebViewClient : WebViewClient
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{
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private readonly string _javascript;
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public JSWebViewClient(string javascript)
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{
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_javascript = javascript;
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}
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public override void OnPageFinished(AWebkit.WebView view, string url)
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{
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base.OnPageFinished(view, url);
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view.EvaluateJavascript(_javascript, null);
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}
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}
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}
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}
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