[dotnet] add support for casting desktop

Author: titusfortner

dotnet/src/webdriver/Chrome/ChromeDriver.cs

@@ -65,6 +65,7 @@ public class ChromeDriver : ChromiumDriver
             { GetCastSinksCommand, new HttpCommandInfo(HttpCommandInfo.GetCommand, "/session/{sessionId}/goog/cast/get_sinks") },
             { SelectCastSinkCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/goog/cast/set_sink_to_use") },
             { StartCastTabMirroringCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/goog/cast/start_tab_mirroring") },
+            { StartCastDesktopMirroringCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/goog/cast/start_desktop_mirroring") },
             { GetCastIssueMessageCommand, new HttpCommandInfo(HttpCommandInfo.GetCommand, "/session/{sessionId}/goog/cast/get_issue_message") },
             { StopCastingCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/goog/cast/stop_casting") }
         };

dotnet/src/webdriver/Chromium/ChromiumDriver.cs

@@ -54,6 +54,11 @@ public class ChromiumDriver : WebDriver, ISupportsLogs, IDevTools
         /// </summary>
         public static readonly string StartCastTabMirroringCommand = "startCastTabMirroring";
 
+        /// <summary>
+        /// Command for starting cast desktop mirroring in a driver for a Chromium-based browser.
+        /// </summary>
+        public static readonly string StartCastDesktopMirroringCommand = "startCastDesktopMirroring";
+
         /// <summary>
         /// Command for getting a cast issued message in a driver for a Chromium-based browser.
         /// </summary>
@@ -393,6 +398,22 @@ public void StartTabMirroring(string deviceName)
             this.Execute(StartCastTabMirroringCommand, parameters);
         }
 
+        /// <summary>
+        /// Initiates mirroring of the desktop on the specified device.
+        /// </summary>
+        /// <param name="deviceName">Name of the target sink (device).</param>
+        public void StartDesktopMirroring(string deviceName)
+        {
+            if (deviceName == null)
+            {
+                throw new ArgumentNullException(nameof(deviceName), "deviceName must not be null");
+            }
+
+            Dictionary<string, object> parameters = new Dictionary<string, object>();
+            parameters["sinkName"] = deviceName;
+            this.Execute(StartCastDesktopMirroringCommand, parameters);
+        }
+
         /// <summary>
         /// Returns the error message if there is any issue in a Cast session.
         /// </summary>

dotnet/src/webdriver/Edge/EdgeDriver.cs

@@ -35,6 +35,7 @@ public class EdgeDriver : ChromiumDriver
             { GetCastSinksCommand, new HttpCommandInfo(HttpCommandInfo.GetCommand, "/session/{sessionId}/ms/cast/get_sinks") },
             { SelectCastSinkCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/ms/cast/set_sink_to_use") },
             { StartCastTabMirroringCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/ms/cast/start_tab_mirroring") },
+            { StartCastDesktopMirroringCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/ms/cast/start_desktop_mirroring") },
             { GetCastIssueMessageCommand, new HttpCommandInfo(HttpCommandInfo.GetCommand, "/session/{sessionId}/ms/cast/get_issue_message") },
             { StopCastingCommand, new HttpCommandInfo(HttpCommandInfo.PostCommand, "/session/{sessionId}/ms/cast/stop_casting") }
         };