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#import <Foundation/Foundation.h>

namespace mozc {
namespace commands {
class Output;
class SessionCommand;
}  // namespace mozc::commands
}  // namespace mozc

// ControllerCallback is the collection of methods which will be
// called from GoogleJapaneseInputServer.  Each Controller should
// implement these methods (although there is only one method right
// now).
@protocol ControllerCallback
- (void)sendCommand:(mozc::commands::SessionCommand &)data;

// In the future, some utility tools will send the result text via
// this method.
- (void)outputResult:(mozc::commands::Output *)data;
@end

// RendererCallback is a protocol to send the clicked information and
// usage stats event information back to the UI client.
// We don't use normal ipc mechanism for this because our UI client
// process is not a server.  Rather we free-ride the existing connection
// of normal IMKit.
@protocol ServerCallback
// This method is called when a user clicks an item in a candidate
// window or when the renderer sends the usage stats event information.
// The |data| contains a serialized protobuf message.
- (void)sendData:(NSData *)data;

// Register the current controller.
- (void)setCurrentController:(id<ControllerCallback>)controller;

// outputResult is a method which calls outputResult: of the current
// controller.
- (void)outputResult:(NSData *)data;
@end
