[desktop-webview-window] Get positional parameters for webview window

packages/desktop_webview_window/lib/src/webview.dart

@@ -62,6 +62,9 @@ abstract class Webview {
   /// Activates the webview window (giving it the focus)
   Future<void> bringToForeground({bool maximized = false});
 
+  /// get position, extents and maximization info of the webview window
+  Future<Map<dynamic,dynamic>?> getPositionalParameters();
+
   /// Reload the current page.
   Future<void> reload();
 

packages/desktop_webview_window/lib/src/webview_impl.dart

@@ -200,6 +200,13 @@ class WebviewImpl extends Webview {
     });
   }
 
+  @override
+  Future<Map<dynamic,dynamic>?> getPositionalParameters() async {
+    return await channel.invokeMethod("getPositionalParameters", {
+      "viewId": viewId,
+    });
+  }
+
   @override
   Future<void> back() {
     return channel.invokeMethod("back", {"viewId": viewId});

packages/desktop_webview_window/windows/web_view_window_plugin.cc

@@ -209,6 +209,18 @@ void WebviewWindowPlugin::HandleMethodCall(
     }
     windows_[window_id]->bringToForeground(maximized);
     result->Success();
+  } else if (method_call.method_name() == "getPositionalParameters") {
+      auto* arguments = std::get_if<flutter::EncodableMap>(method_call.arguments());
+      auto window_id = arguments->at(flutter::EncodableValue("viewId")).LongValue();
+      if (!windows_.count(window_id)) {
+        result->Error("0", "can not find webview window for id");
+        return;
+      }
+      if (!windows_[window_id]->GetWebView()) {
+        result->Error("0", "webview window not ready");
+        return;
+      }
+      windows_[window_id]->getPositionalParameters(std::move(result));
   } else if (method_call.method_name() == "reload") {
     auto *arguments = std::get_if<flutter::EncodableMap>(method_call.arguments());
     auto window_id = arguments->at(flutter::EncodableValue("viewId")).LongValue();

packages/desktop_webview_window/windows/webview_window.cc

@@ -155,6 +155,21 @@ void WebviewWindow::bringToForeground(bool maximized) {
   }
 }
 
+void WebviewWindow::getPositionalParameters(std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> completer) {
+  RECT rc;
+  GetWindowRect(hwnd_.get(), &rc);
+
+  std::unique_ptr<WINDOWPLACEMENT> wp(new WINDOWPLACEMENT);
+  GetWindowPlacement(hwnd_.get(), wp.get());
+  std::map<flutter::EncodableValue, flutter::EncodableValue> m{
+    {"left", rc.left},
+    {"top", rc.top},
+    {"width", rc.right-rc.left},
+    {"height", rc.bottom-rc.top},
+    {"maximized", wp->showCmd==SW_MAXIMIZE}};
+  completer->Success(flutter::EncodableValue(m));
+}
+
 // static
 LRESULT CALLBACK
 WebviewWindow::WndProc(

packages/desktop_webview_window/windows/webview_window.h

@@ -62,6 +62,8 @@ class WebviewWindow {
 
   void bringToForeground(bool maximized);
 
+  void getPositionalParameters(std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> completer);
+
   [[nodiscard]] const std::unique_ptr<webview_window::WebView> &GetWebView() const {
     return web_view_;
   }