[Clipboard] setData and getData implementations added

shell/platform/tizen/channels/platform_channel.cc

@@ -214,11 +214,9 @@ void PlatformChannel::HandleMethodCall(
 
     result->Error(error_cause, error_message);
   } else if (method == "Clipboard.getData") {
-    result->NotImplemented();
+    Clipboard::GetData(call, std::move(result));
   } else if (method == "Clipboard.setData") {
-    result->NotImplemented();
-  } else if (method == "Clipboard.hasStrings") {
-    result->NotImplemented();
+    Clipboard::SetData(call, std::move(result));
   } else if (method == "SystemChrome.setPreferredOrientations") {
     if (renderer_) {
       static const std::string kPortraitUp = "DeviceOrientation.portraitUp";
@@ -268,3 +266,53 @@ void PlatformChannel::HandleMethodCall(
     result->NotImplemented();
   }
 }
+
+// Clipboard constants and variables
+namespace Clipboard {
+
+// naive implementation using std::string as a container of internal clipboard
+// data
+std::string string_clipboard = "";
+
+static constexpr char kTextKey[] = "text";
+static constexpr char kTextPlainFormat[] = "text/plain";
+static constexpr char kUnknownClipboardFormatError[] =
+    "Unknown clipboard format error";
+static constexpr char kUnknownClipboardError[] =
+    "Unknown error during clipboard data retrieval";
+
+void GetData(
+    const flutter::MethodCall<rapidjson::Document>& call,
+    std::unique_ptr<flutter::MethodResult<rapidjson::Document>> result) {
+  const rapidjson::Value& format = call.arguments()[0];
+
+  // https://api.flutter.dev/flutter/services/Clipboard/kTextPlain-constant.html
+  // API supports only kTextPlain format
+  if (strcmp(format.GetString(), kTextPlainFormat) != 0) {
+    result->Error(kUnknownClipboardFormatError,
+                  "Clipboard API only supports text.");
+    return;
+  }
+
+  rapidjson::Document document;
+  document.SetObject();
+  rapidjson::Document::AllocatorType& allocator = document.GetAllocator();
+  document.AddMember(rapidjson::Value(kTextKey, allocator),
+                      rapidjson::Value(string_clipboard, allocator),
+                      allocator);
+  result->Success(document);
+}
+
+void SetData(
+    const flutter::MethodCall<rapidjson::Document>& call,
+    std::unique_ptr<flutter::MethodResult<rapidjson::Document>> result) {
+  const rapidjson::Value& document = *call.arguments();
+  rapidjson::Value::ConstMemberIterator itr = document.FindMember(kTextKey);
+  if (itr == document.MemberEnd()) {
+    result->Error(kUnknownClipboardError, "Invalid message format");
+    return;
+  }
+  string_clipboard = itr->value.GetString();
+  result->Success();
+}
+}  // namespace Clipboard

shell/platform/tizen/channels/platform_channel.h

@@ -28,4 +28,13 @@ class PlatformChannel {
   TizenRenderer* renderer_;
 };
 
+namespace Clipboard {
+void GetData(
+    const flutter::MethodCall<rapidjson::Document>& call,
+    std::unique_ptr<flutter::MethodResult<rapidjson::Document>> result);
+void SetData(
+    const flutter::MethodCall<rapidjson::Document>& call,
+    std::unique_ptr<flutter::MethodResult<rapidjson::Document>> result);
+};
+
 #endif  //  EMBEDDER_PLATFORM_CHANNEL_H_