no more submodule

GtkSharp/Source/Samples/Sections/Widgets/WebviewSection.cs

@@ -0,0 +1,145 @@
+// This is free and unencumbered software released into the public domain.
+// Happy coding!!! - GtkSharp Team
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using Atk;
+using Gdk;
+using Gtk;
+using WebKit;
+using IAsyncResult = GLib.IAsyncResult;
+using Object = GLib.Object;
+
+namespace Samples
+{
+
+	[Section(ContentType = typeof(WebView), Category = Category.Widgets)]
+	class WebviewSection : ListSection
+	{
+
+		public WebviewSection()
+		{
+			if (!WebKit.Global.IsSupported) {
+				AddItem(($"{nameof(WebKit.WebView)}", new Label($"{typeof(WebView).Namespace} is not suported on your OS")));
+
+				return;
+			}
+
+			AddItem(ShowHtml());
+			AddItem(ShowJavaScript());
+			AddItem(ShowUri());
+
+		}
+
+		public (string, Widget) ShowHtml()
+		{
+			var webView = new WebView {
+				HeightRequest = 100,
+				WidthRequest = 400,
+				Hexpand = true
+			};
+
+			webView.LoadHtml($"This is a <b>{nameof(WebView)}</b> showing html text");
+
+			return ($"{nameof(WebView)} show html text:", webView);
+		}
+
+		public (string, Widget) ShowJavaScript()
+		{
+			var webView = new WebView {
+				HeightRequest = 100,
+				WidthRequest = 400,
+				Hexpand = true
+			};
+
+			webView.Settings.EnableDeveloperExtras = true;
+			var userContentManager = webView.UserContentManager;
+
+			var messageHandlerName = "gtksharp";
+
+			var script = new UserScript(
+				source: $"function testFunc() {{\n" +
+				        $"window.webkit.messageHandlers.{messageHandlerName}.postMessage(\"postMessage\");\n" +
+				        $"return 'Success' }};\n",
+				UserContentInjectedFrames.AllFrames,
+				UserScriptInjectionTime.Start, null, null);
+
+			userContentManager.AddScript(script);
+			
+			var buttonClickPostMessage = $"var button = document.getElementById(\"clickMeButton\");\n" +
+			                  $"button.addEventListener(\"click\", " +
+			                  $"function() {{varmessageToPost = {{'ButtonId':'clickMeButton'}};\n" +
+			                  $"window.webkit.messageHandlers.{messageHandlerName}.postMessage(\"clickMeButton clicked\");\n}},false);";
+			
+			var script2 = new UserScript(
+				source: buttonClickPostMessage,
+				UserContentInjectedFrames.AllFrames,
+				UserScriptInjectionTime.End, null, null);
+			
+			
+			userContentManager.AddScript(script2);
+			
+			userContentManager.RegisterScriptMessageHandler(messageHandlerName);
+
+			userContentManager.ScriptMessageReceived += (o, args) => {
+				var value = args.JsResult?.JsValue;
+
+				if (value is { IsString: true } v)
+					ApplicationOutput.WriteLine($"{nameof(userContentManager.ScriptMessageReceived)}:\t{nameof(JavascriptResult.JsValue)}\t{v?.ToString()}");
+
+			};
+
+			webView.LoadHtml($"This is a <b>{nameof(WebView)}</b> with {nameof(UserScript)}" +
+			                 "<br/>Send message <input id=\"clickMeButton\" type=\"button\" value=\"Submit\" class=\"button\" onclick=\"\">");
+
+			webView.LoadChanged += (s, e) => {
+				ApplicationOutput.WriteLine(s, $"{e.LoadEvent}");
+
+				if (e.LoadEvent != LoadEvent.Finished)
+					return;
+
+				webView.RunJavascript("testFunc()", null, HandleJavaScriptResult);
+
+			};
+
+			void HandleJavaScriptResult(object source_object, IAsyncResult res)
+			{
+				if (source_object is not WebView view) return;
+
+				try {
+					JavascriptResult js_result = view.RunJavascriptFinish(res);
+
+					if (js_result.JsValue is { } jsValue) {
+						if (jsValue.IsString) {
+							ApplicationOutput.WriteLine($"{nameof(webView.RunJavascriptFinish)}:\t{nameof(JavascriptResult.JsValue)}\t{jsValue.ToString()}");
+						}
+					}
+
+				} catch (Exception exception) {
+					ApplicationOutput.WriteLine($"{nameof(webView.RunJavascriptFinish)} throws:\n{exception.Message}");
+				}
+			}
+
+			return ($"{nameof(WebView)} with {nameof(UserScript)}:", webView);
+		}
+
+		public (string, Widget) ShowUri()
+		{
+			var webView = new WebView {
+				WidthRequest = 400,
+
+				Vexpand = true,
+				Hexpand = true,
+			};
+
+			webView.LoadUri("https://github.com/GtkSharp/GtkSharp#readme");
+
+			return ($"{nameof(WebView)} show uri:", webView);
+		}
+
+	}
+
+}