IBrowserHost - Add GetZoomLevel

Can be called directly on the CEF UI thread

Author: amaitland

CefSharp.Core/Internals/CefBrowserHostWrapper.cpp

@@ -108,6 +108,20 @@ void CefBrowserHostWrapper::SetZoomLevel(double zoomLevel)
     _browserHost->SetZoomLevel(zoomLevel);
 }
 
+double CefBrowserHostWrapper::GetZoomLevel()
+{
+    ThrowIfDisposed();
+
+    if (CefCurrentlyOn(TID_UI))
+    {
+
+        return _browserHost->GetZoomLevel();
+    }
+
+    throw gcnew InvalidOperationException("This method can only be called directly on the CEF UI Thread. Use GetZoomLevelAsync or use Cef.UIThreadTaskFactory to marshal the call onto the CEF UI Thread.");
+
+}
+
 Task<double>^ CefBrowserHostWrapper::GetZoomLevelAsync()
 {
     ThrowIfDisposed();

CefSharp.Core/Internals/CefBrowserHostWrapper.h

@@ -46,6 +46,7 @@ namespace CefSharp
             virtual void Print();
             virtual void PrintToPdf(String^ path, PdfPrintSettings^ settings, IPrintToPdfCallback^ callback);
             virtual void SetZoomLevel(double zoomLevel);
+            virtual double GetZoomLevel();
             virtual Task<double>^ GetZoomLevelAsync();
             virtual IntPtr GetWindowHandle();
             virtual void CloseBrowser(bool forceClose);

CefSharp/IBrowserHost.cs

@@ -118,7 +118,14 @@ public interface IBrowserHost : IDisposable
         IntPtr GetWindowHandle();
 
         /// <summary>
-        /// Get the current zoom level. The default zoom level is 0.0. This method can only be called on the CEF UI thread. 
+        /// Gets the current zoom level. The default zoom level is 0.0. This method can only be called on the CEF UI thread. 
+        /// </summary>
+        /// <returns>zoom level (default is 0.0)</returns>
+        double GetZoomLevel();
+
+        /// <summary>
+        /// Get the current zoom level. The default zoom level is 0.0. This method executes GetZoomLevel on the CEF UI thread
+        /// in an async fashion.
         /// </summary>
         /// <returns> a <see cref="Task{Double}"/> that when executed returns the zoom level as a double.</returns>
         Task<double> GetZoomLevelAsync();