[webview_flutter] Add cookie and scroll APIs (#40)

* Implement a method channel for handling cookies
* Add GetScrollX and GetScrollY APIs
* Add code to set UserAgent when initializing the webview

Author: seungsoo47

packages/webview_flutter/example/tizen/lib/arm/liblightweight-web-engine.mobile.so

@@ -3,7 +3,7 @@ description: Tizen implementation of the webview plugin
 version: 0.0.1
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.2.2 <3.0.0"
   flutter: ">=1.20.0 <2.0.0"
 
 dependencies:

packages/webview_flutter/pubspec.yaml

@@ -53,6 +53,20 @@ class LWE_EXPORT LWE {
 
 enum class WebSecurityMode;
 
+class LWE_EXPORT CookieManager {
+public:
+    std::string GetCookie(std::string url);
+    bool HasCookies();
+    void ClearCookies();
+
+    static CookieManager* GetInstance();
+    static void Destroy();
+
+private:
+    CookieManager();
+    ~CookieManager();
+};
+
 class LWE_EXPORT Settings {
 public:
     Settings(const std::string& defaultUA, const std::string& ua);
@@ -290,6 +304,8 @@ class LWE_EXPORT WebContainer {
     std::string GetTitle();
     void ScrollTo(int x, int y);
     void ScrollBy(int x, int y);
+    int GetScrollX();
+    int GetScrollY();
 
     size_t Width();
     size_t Height();
@@ -370,6 +386,8 @@ class LWE_EXPORT WebView {
     std::string GetTitle();
     void ScrollTo(int x, int y);
     void ScrollBy(int x, int y);
+    int GetScrollX();
+    int GetScrollY();
 
     virtual void* Unwrap()
     {

packages/webview_flutter/tizen/inc/lwe/LWEWebView.h

@@ -172,6 +172,16 @@ WebView::WebView(flutter::PluginRegistrar* registrar, int viewId,
         webview->HandleMethodCall(call, std::move(result));
       });
 
+  auto cookieChannel =
+      std::make_unique<flutter::MethodChannel<flutter::EncodableValue>>(
+          GetPluginRegistrar()->messenger(),
+          "plugins.flutter.io/cookie_manager",
+          &flutter::StandardMethodCodec::GetInstance());
+  cookieChannel->SetMethodCallHandler(
+      [webview = this](const auto& call, auto result) {
+        webview->HandleCookieMethodCall(call, std::move(result));
+      });
+
   std::string url;
   auto initialUrl = params[flutter::EncodableValue("initialUrl")];
   if (std::holds_alternative<std::string>(initialUrl)) {
@@ -198,6 +208,16 @@ WebView::WebView(flutter::PluginRegistrar* registrar, int viewId,
     }
   }
 
+  // TODO: Not implemented
+  // auto media = params[flutter::EncodableValue("autoMediaPlaybackPolicy")];
+
+  auto userAgent = params[flutter::EncodableValue("userAgent")];
+  if (std::holds_alternative<std::string>(userAgent)) {
+    auto settings = webViewInstance_->GetSettings();
+    settings.SetUserAgentString(std::get<std::string>(userAgent));
+    webViewInstance_->SetSettings(settings);
+  }
+
   webViewInstance_->RegisterOnPageStartedHandler(
       [this](LWE::WebContainer* container, const std::string& url) {
         LOG_DEBUG("RegisterOnPageStartedHandler(url: %s)\n", url.c_str());
@@ -834,9 +854,31 @@ void WebView::HandleMethodCall(
     webViewInstance_->ScrollBy(x, y);
     result->Success();
   } else if (methodName.compare("getScrollX") == 0) {
-    result->NotImplemented();
+    result->Success(flutter::EncodableValue(webViewInstance_->GetScrollX()));
   } else if (methodName.compare("getScrollY") == 0) {
+    result->Success(flutter::EncodableValue(webViewInstance_->GetScrollY()));
+  } else {
     result->NotImplemented();
+  }
+}
+
+void WebView::HandleCookieMethodCall(
+    const flutter::MethodCall<flutter::EncodableValue>& method_call,
+    std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result) {
+  if (webViewInstance_ == nullptr) {
+    result->Error("Not Webview created");
+    return;
+  }
+
+  const auto methodName = method_call.method_name();
+  const auto& arguments = *method_call.arguments();
+
+  LOG_DEBUG("WebView::HandleMethodCall : %s \n ", methodName.c_str());
+
+  if (methodName.compare("clearCookies") == 0) {
+    LWE::CookieManager* cookie = LWE::CookieManager::GetInstance();
+    cookie->ClearCookies();
+    result->Success(flutter::EncodableValue(true));
   } else {
     result->NotImplemented();
   }

packages/webview_flutter/tizen/lib/liblightweight-web-engine.mobile.so

@@ -43,6 +43,9 @@ class WebView : public PlatformView {
   void HandleMethodCall(
       const flutter::MethodCall<flutter::EncodableValue>& method_call,
       std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);
+  void HandleCookieMethodCall(
+      const flutter::MethodCall<flutter::EncodableValue>& method_call,
+      std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);
   std::string GetChannelName();
   void InitWebView();