cpd/build/ios/Release-iphoneos/Flutter.framework/Headers/FlutterChannels.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_SHELL_PLATFORM_DARWIN_COMMON_FRAMEWORK_HEADERS_FLUTTERCHANNELS_H_
#define FLUTTER_SHELL_PLATFORM_DARWIN_COMMON_FRAMEWORK_HEADERS_FLUTTERCHANNELS_H_
#import "FlutterBinaryMessenger.h"
#import "FlutterCodecs.h"
NS_ASSUME_NONNULL_BEGIN
/**
* A message reply callback.
*
* Used for submitting a reply back to a Flutter message sender. Also used in
* the dual capacity for handling a message reply received from Flutter.
*
* @param reply The reply.
*/
typedef void (^FlutterReply)(id _Nullable reply);
/**
* A strategy for handling incoming messages from Flutter and to send
* asynchronous replies back to Flutter.
*
* @param message The message.
* @param callback A callback for submitting a reply to the sender which can be invoked from any
* thread.
*/
typedef void (^FlutterMessageHandler)(id _Nullable message, FlutterReply callback);
/**
* A channel for communicating with the Flutter side using basic, asynchronous
* message passing.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterBasicMessageChannel : NSObject
/**
* Creates a `FlutterBasicMessageChannel` with the specified name and binary
* messenger.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* The channel uses `FlutterStandardMessageCodec` to encode and decode messages.
*
* @param name The channel name.
* @param messenger The binary messenger.
*/
+ (instancetype)messageChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
/**
* Creates a `FlutterBasicMessageChannel` with the specified name, binary
* messenger, and message codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The message codec.
*/
+ (instancetype)messageChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMessageCodec>*)codec;
/**
* Initializes a `FlutterBasicMessageChannel` with the specified name, binary
* messenger, and message codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The message codec.
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMessageCodec>*)codec;
/**
* Initializes a `FlutterBasicMessageChannel` with the specified name, binary
* messenger, and message codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The message codec.
* @param taskQueue The FlutterTaskQueue that executes the handler (see
-[FlutterBinaryMessenger makeBackgroundTaskQueue]).
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMessageCodec>*)codec
taskQueue:(NSObject<FlutterTaskQueue>* _Nullable)taskQueue;
/**
* Sends the specified message to the Flutter side, ignoring any reply.
*
* @param message The message. Must be supported by the codec of this
* channel.
*/
- (void)sendMessage:(id _Nullable)message;
/**
* Sends the specified message to the Flutter side, expecting an asynchronous
* reply.
*
* @param message The message. Must be supported by the codec of this channel.
* @param callback A callback to be invoked with the message reply from Flutter.
*/
- (void)sendMessage:(id _Nullable)message reply:(FlutterReply _Nullable)callback;
/**
* Registers a message handler with this channel.
*
* Replaces any existing handler. Use a `nil` handler for unregistering the
* existing handler.
*
* @param handler The message handler.
*/
- (void)setMessageHandler:(FlutterMessageHandler _Nullable)handler;
/**
* Adjusts the number of messages that will get buffered when sending messages to
* channels that aren't fully set up yet. For example, the engine isn't running
* yet or the channel's message handler isn't set up on the Dart side yet.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param newSize The number of messages that will get buffered.
*/
+ (void)resizeChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
size:(NSInteger)newSize;
/**
* Adjusts the number of messages that will get buffered when sending messages to
* channels that aren't fully set up yet. For example, the engine isn't running
* yet or the channel's message handler isn't set up on the Dart side yet.
*
* @param newSize The number of messages that will get buffered.
*/
- (void)resizeChannelBuffer:(NSInteger)newSize;
/**
* Defines whether the channel should show warning messages when discarding messages
* due to overflow.
*
* @param warns When false, the channel is expected to overflow and warning messages
* will not be shown.
* @param name The channel name.
* @param messenger The binary messenger.
*/
+ (void)setWarnsOnOverflow:(BOOL)warns
forChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
/**
* Defines whether the channel should show warning messages when discarding messages
* due to overflow.
*
* @param warns When false, the channel is expected to overflow and warning messages
* will not be shown.
*/
- (void)setWarnsOnOverflow:(BOOL)warns;
@end
/**
* A method call result callback.
*
* Used for submitting a method call result back to a Flutter caller. Also used in
* the dual capacity for handling a method call result received from Flutter.
*
* @param result The result.
*/
typedef void (^FlutterResult)(id _Nullable result);
/**
* A strategy for handling method calls.
*
* @param call The incoming method call.
* @param result A callback to asynchronously submit the result of the call.
* Invoke the callback with a `FlutterError` to indicate that the call failed.
* Invoke the callback with `FlutterMethodNotImplemented` to indicate that the
* method was unknown. Any other values, including `nil`, are interpreted as
* successful results. This can be invoked from any thread.
*/
typedef void (^FlutterMethodCallHandler)(FlutterMethodCall* call, FlutterResult result);
/**
* A constant used with `FlutterMethodCallHandler` to respond to the call of an
* unknown method.
*/
FLUTTER_DARWIN_EXPORT
extern NSObject const* FlutterMethodNotImplemented;
/**
* A channel for communicating with the Flutter side using invocation of
* asynchronous methods.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterMethodChannel : NSObject
/**
* Creates a `FlutterMethodChannel` with the specified name and binary messenger.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* The channel uses `FlutterStandardMethodCodec` to encode and decode method calls
* and result envelopes.
*
* @param name The channel name.
* @param messenger The binary messenger.
*/
+ (instancetype)methodChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
/**
* Creates a `FlutterMethodChannel` with the specified name, binary messenger, and
* method codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
*/
+ (instancetype)methodChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec;
/**
* Initializes a `FlutterMethodChannel` with the specified name, binary messenger,
* and method codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec;
/**
* Initializes a `FlutterMethodChannel` with the specified name, binary messenger,
* method codec, and task queue.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
* @param taskQueue The FlutterTaskQueue that executes the handler (see
-[FlutterBinaryMessenger makeBackgroundTaskQueue]).
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec
taskQueue:(NSObject<FlutterTaskQueue>* _Nullable)taskQueue;
// clang-format off
/**
* Invokes the specified Flutter method with the specified arguments, expecting
* no results.
*
* @see [MethodChannel.setMethodCallHandler](https://api.flutter.dev/flutter/services/MethodChannel/setMethodCallHandler.html)
*
* @param method The name of the method to invoke.
* @param arguments The arguments. Must be a value supported by the codec of this
* channel.
*/
// clang-format on
- (void)invokeMethod:(NSString*)method arguments:(id _Nullable)arguments;
/**
* Invokes the specified Flutter method with the specified arguments, expecting
* an asynchronous result.
*
* @param method The name of the method to invoke.
* @param arguments The arguments. Must be a value supported by the codec of this
* channel.
* @param callback A callback that will be invoked with the asynchronous result.
* The result will be a `FlutterError` instance, if the method call resulted
* in an error on the Flutter side. Will be `FlutterMethodNotImplemented`, if
* the method called was not implemented on the Flutter side. Any other value,
* including `nil`, should be interpreted as successful results.
*/
- (void)invokeMethod:(NSString*)method
arguments:(id _Nullable)arguments
result:(FlutterResult _Nullable)callback;
/**
* Registers a handler for method calls from the Flutter side.
*
* Replaces any existing handler. Use a `nil` handler for unregistering the
* existing handler.
*
* @param handler The method call handler.
*/
- (void)setMethodCallHandler:(FlutterMethodCallHandler _Nullable)handler;
/**
* Adjusts the number of messages that will get buffered when sending messages to
* channels that aren't fully set up yet. For example, the engine isn't running
* yet or the channel's message handler isn't set up on the Dart side yet.
*/
- (void)resizeChannelBuffer:(NSInteger)newSize;
@end
/**
* An event sink callback.
*
* @param event The event.
*/
typedef void (^FlutterEventSink)(id _Nullable event);
/**
* A strategy for exposing an event stream to the Flutter side.
*/
FLUTTER_DARWIN_EXPORT
@protocol FlutterStreamHandler
/**
* Sets up an event stream and begin emitting events.
*
* Invoked when the first listener is registered with the Stream associated to
* this channel on the Flutter side.
*
* @param arguments Arguments for the stream.
* @param events A callback to asynchronously emit events. Invoke the
* callback with a `FlutterError` to emit an error event. Invoke the
* callback with `FlutterEndOfEventStream` to indicate that no more
* events will be emitted. Any other value, including `nil` are emitted as
* successful events.
* @return A FlutterError instance, if setup fails.
*/
- (FlutterError* _Nullable)onListenWithArguments:(id _Nullable)arguments
eventSink:(FlutterEventSink)events;
/**
* Tears down an event stream.
*
* Invoked when the last listener is deregistered from the Stream associated to
* this channel on the Flutter side.
*
* The channel implementation may call this method with `nil` arguments
* to separate a pair of two consecutive set up requests. Such request pairs
* may occur during Flutter hot restart.
*
* @param arguments Arguments for the stream.
* @return A FlutterError instance, if teardown fails.
*/
- (FlutterError* _Nullable)onCancelWithArguments:(id _Nullable)arguments;
@end
/**
* A constant used with `FlutterEventChannel` to indicate end of stream.
*/
FLUTTER_DARWIN_EXPORT
extern NSObject const* FlutterEndOfEventStream;
/**
* A channel for communicating with the Flutter side using event streams.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterEventChannel : NSObject
/**
* Creates a `FlutterEventChannel` with the specified name and binary messenger.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterViewController`.
*
* The channel uses `FlutterStandardMethodCodec` to decode stream setup and
* teardown requests, and to encode event envelopes.
*
* @param name The channel name.
* @param messenger The binary messenger.
*/
+ (instancetype)eventChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger;
/**
* Creates a `FlutterEventChannel` with the specified name, binary messenger,
* and method codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
*/
+ (instancetype)eventChannelWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec;
/**
* Initializes a `FlutterEventChannel` with the specified name, binary messenger,
* and method codec.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec;
/**
* Initializes a `FlutterEventChannel` with the specified name, binary messenger,
* method codec and task queue.
*
* The channel name logically identifies the channel; identically named channels
* interfere with each other's communication.
*
* The binary messenger is a facility for sending raw, binary messages to the
* Flutter side. This protocol is implemented by `FlutterEngine` and `FlutterViewController`.
*
* @param name The channel name.
* @param messenger The binary messenger.
* @param codec The method codec.
* @param taskQueue The FlutterTaskQueue that executes the handler (see
-[FlutterBinaryMessenger makeBackgroundTaskQueue]).
*/
- (instancetype)initWithName:(NSString*)name
binaryMessenger:(NSObject<FlutterBinaryMessenger>*)messenger
codec:(NSObject<FlutterMethodCodec>*)codec
taskQueue:(NSObject<FlutterTaskQueue>* _Nullable)taskQueue;
/**
* Registers a handler for stream setup requests from the Flutter side.
*
* Replaces any existing handler. Use a `nil` handler for unregistering the
* existing handler.
*
* @param handler The stream handler.
*/
- (void)setStreamHandler:(NSObject<FlutterStreamHandler>* _Nullable)handler;
@end
NS_ASSUME_NONNULL_END
#endif // FLUTTER_SHELL_PLATFORM_DARWIN_COMMON_FRAMEWORK_HEADERS_FLUTTERCHANNELS_H_