Use proc table for embedder APIs (#97)

* Use proc table for embedder APIs

* Use the proc table like other platform implementations
* Use FlutterEngine as private memeber of FlutterTizenEngine
* Only FlutterTizenEngine is dependent on FlutterEngine

Signed-off-by: Boram Bae <boram21.bae@samsung.com>

Author: bbrto21

shell/platform/tizen/channels/lifecycle_channel.cc

@@ -4,6 +4,7 @@
 
 #include "lifecycle_channel.h"
 
+#include "flutter/shell/platform/tizen/flutter_tizen_engine.h"
 #include "flutter/shell/platform/tizen/tizen_log.h"
 
 static constexpr char kChannelName[] = "flutter/lifecycle";
@@ -12,20 +13,15 @@ static constexpr char kResumed[] = "AppLifecycleState.resumed";
 static constexpr char kPaused[] = "AppLifecycleState.paused";
 static constexpr char kDetached[] = "AppLifecycleState.detached";
 
-LifecycleChannel::LifecycleChannel(FLUTTER_API_SYMBOL(FlutterEngine)
-                                       flutter_engine)
-    : flutter_engine_(flutter_engine) {}
+LifecycleChannel::LifecycleChannel(FlutterTizenEngine* engine)
+    : engine_(engine) {}
 
 LifecycleChannel::~LifecycleChannel() {}
 
 void LifecycleChannel::SendLifecycleMessage(const char message[]) {
-  FlutterPlatformMessage platformMessage = {};
-  platformMessage.struct_size = sizeof(FlutterPlatformMessage);
-  platformMessage.channel = kChannelName;
-  platformMessage.message = reinterpret_cast<const uint8_t*>(message);
-  platformMessage.message_size = strlen(message);
-  platformMessage.response_handle = nullptr;
-  FlutterEngineSendPlatformMessage(flutter_engine_, &platformMessage);
+  engine_->SendPlatformMessage(kChannelName,
+                               reinterpret_cast<const uint8_t*>(message),
+                               strlen(message), nullptr, nullptr);
 }
 
 void LifecycleChannel::AppIsInactive() {

shell/platform/tizen/channels/lifecycle_channel.h

@@ -5,11 +5,11 @@
 #ifndef EMBEDDER_LIFECYCLE_CHANNEL_H_
 #define EMBEDDER_LIFECYCLE_CHANNEL_H_
 
-#include "flutter/shell/platform/embedder/embedder.h"
+class FlutterTizenEngine;
 
 class LifecycleChannel {
  public:
-  explicit LifecycleChannel(FLUTTER_API_SYMBOL(FlutterEngine) flutter_engine);
+  explicit LifecycleChannel(FlutterTizenEngine* engine);
   virtual ~LifecycleChannel();
 
   void AppIsInactive();
@@ -19,7 +19,7 @@ class LifecycleChannel {
   void SendLifecycleMessage(const char message[]);
 
  private:
-  FLUTTER_API_SYMBOL(FlutterEngine) flutter_engine_;
+  FlutterTizenEngine* engine_{nullptr};
 };
 
 #endif  // EMBEDDER_LIFECYCLE_CHANNEL_H_

shell/platform/tizen/channels/localization_channel.cc

@@ -5,18 +5,17 @@
 #include "localization_channel.h"
 
 #include <utils_i18n.h>
-
 #include <vector>
 
+#include "flutter/shell/platform/tizen/flutter_tizen_engine.h"
 #include "flutter/shell/platform/tizen/tizen_log.h"
 #include "rapidjson/document.h"
 #include "rapidjson/writer.h"
 
 static constexpr char kChannelName[] = "flutter/localization";
 
-LocalizationChannel::LocalizationChannel(FLUTTER_API_SYMBOL(FlutterEngine)
-                                             flutter_engine)
-    : flutter_engine_(flutter_engine) {}
+LocalizationChannel::LocalizationChannel(FlutterTizenEngine* engine)
+    : engine_(engine) {}
 
 LocalizationChannel::~LocalizationChannel() {}
 
@@ -54,9 +53,8 @@ void LocalizationChannel::SendLocales() {
   }
 
   FT_LOGD("Send %zu available locales", flutter_locales.size());
-  // send locales to engine
-  FlutterEngineUpdateLocales(
-      flutter_engine_,
+  // Send locales to engine
+  engine_->UpdateLocales(
       const_cast<const FlutterLocale**>(flutter_locales.data()),
       flutter_locales.size());
 
@@ -111,13 +109,9 @@ void LocalizationChannel::SendPlatformResolvedLocale() {
     return;
   }
 
-  FlutterPlatformMessage message = {};
-  message.struct_size = sizeof(FlutterPlatformMessage);
-  message.channel = kChannelName;
-  message.message = reinterpret_cast<const uint8_t*>(buffer.GetString());
-  message.message_size = buffer.GetSize();
-  message.response_handle = nullptr;
-  FlutterEngineSendPlatformMessage(flutter_engine_, &message);
+  engine_->SendPlatformMessage(
+      kChannelName, reinterpret_cast<const uint8_t*>(buffer.GetString()),
+      buffer.GetSize(), nullptr, nullptr);
 
   DestroyFlutterLocale(flutter_locale);
 }

shell/platform/tizen/channels/localization_channel.h

@@ -7,10 +7,11 @@
 
 #include "flutter/shell/platform/embedder/embedder.h"
 
+class FlutterTizenEngine;
+
 class LocalizationChannel {
  public:
-  explicit LocalizationChannel(FLUTTER_API_SYMBOL(FlutterEngine)
-                                   flutter_engine);
+  explicit LocalizationChannel(FlutterTizenEngine* engine);
   virtual ~LocalizationChannel();
 
   void SendLocales();
@@ -20,7 +21,7 @@ class LocalizationChannel {
   FlutterLocale* GetFlutterLocale(const char* locale);
   void DestroyFlutterLocale(FlutterLocale* flutter_locale);
 
-  FLUTTER_API_SYMBOL(FlutterEngine) flutter_engine_;
+  FlutterTizenEngine* engine_;
 };
 
 #endif  // EMBEDDER_LOCALIZATION_CHANNEL_H_

shell/platform/tizen/flutter_tizen.cc

@@ -88,38 +88,16 @@ bool FlutterDesktopMessengerSendWithReply(FlutterDesktopMessengerRef messenger,
                                           const size_t message_size,
                                           const FlutterDesktopBinaryReply reply,
                                           void* user_data) {
-  FlutterPlatformMessageResponseHandle* response_handle = nullptr;
-  if (reply != nullptr && user_data != nullptr) {
-    FlutterEngineResult result = FlutterPlatformMessageCreateResponseHandle(
-        messenger->engine->flutter_engine, reply, user_data, &response_handle);
-    if (result != kSuccess) {
-      FT_LOGE("Failed to create response handle");
-      return false;
-    }
-  }
-  FlutterPlatformMessage platform_message = {
-      sizeof(FlutterPlatformMessage),
-      channel,
-      message,
-      message_size,
-      response_handle,
-  };
-  FlutterEngineResult message_result = FlutterEngineSendPlatformMessage(
-      messenger->engine->flutter_engine, &platform_message);
-  if (response_handle != nullptr) {
-    FlutterPlatformMessageReleaseResponseHandle(
-        messenger->engine->flutter_engine, response_handle);
-  }
-  return message_result == kSuccess;
+  return messenger->engine->SendPlatformMessage(channel, message, message_size,
+                                                reply, user_data);
 }
 
 void FlutterDesktopMessengerSendResponse(
     FlutterDesktopMessengerRef messenger,
     const FlutterDesktopMessageResponseHandle* handle,
     const uint8_t* data,
     size_t data_length) {
-  FlutterEngineSendPlatformMessageResponse(messenger->engine->flutter_engine,
-                                           handle, data, data_length);
+  messenger->engine->SendPlatformMessageResponse(handle, data, data_length);
 }
 
 void FlutterDesktopMessengerSetCallback(FlutterDesktopMessengerRef messenger,
@@ -151,8 +129,7 @@ void FlutterDesktopNotifyAppIsDetached(FlutterDesktopEngineRef engine) {
 }
 
 void FlutterDesktopNotifyLowMemoryWarning(FlutterDesktopEngineRef engine) {
-  auto flutter_engine = EngineFromHandle(engine)->flutter_engine;
-  FlutterEngineNotifyLowMemoryWarning(flutter_engine);
+  EngineFromHandle(engine)->NotifyLowMemoryWarning();
 }
 
 void FlutterRegisterViewFactory(