cpd/build/ios/Debug-iphoneos/Flutter.framework/Headers/FlutterCodecs.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_FLUTTERCODECS_H_
#define FLUTTER_SHELL_PLATFORM_DARWIN_COMMON_FRAMEWORK_HEADERS_FLUTTERCODECS_H_
#import <Foundation/Foundation.h>
#import "FlutterMacros.h"
NS_ASSUME_NONNULL_BEGIN
/**
* A message encoding/decoding mechanism.
*/
FLUTTER_DARWIN_EXPORT
@protocol FlutterMessageCodec
/**
* Returns a shared instance of this `FlutterMessageCodec`.
*/
+ (instancetype)sharedInstance;
/**
* Encodes the specified message into binary.
*
* @param message The message.
* @return The binary encoding, or `nil`, if `message` was `nil`.
*/
- (NSData* _Nullable)encode:(id _Nullable)message;
/**
* Decodes the specified message from binary.
*
* @param message The message.
* @return The decoded message, or `nil`, if `message` was `nil`.
*/
- (id _Nullable)decode:(NSData* _Nullable)message;
@end
/**
* A `FlutterMessageCodec` using unencoded binary messages, represented as
* `NSData` instances.
*
* This codec is guaranteed to be compatible with the corresponding
* [BinaryCodec](https://api.flutter.dev/flutter/services/BinaryCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*
* On the Dart side, messages are represented using `ByteData`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterBinaryCodec : NSObject <FlutterMessageCodec>
@end
/**
* A `FlutterMessageCodec` using UTF-8 encoded `NSString` messages.
*
* This codec is guaranteed to be compatible with the corresponding
* [StringCodec](https://api.flutter.dev/flutter/services/StringCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStringCodec : NSObject <FlutterMessageCodec>
@end
/**
* A `FlutterMessageCodec` using UTF-8 encoded JSON messages.
*
* This codec is guaranteed to be compatible with the corresponding
* [JSONMessageCodec](https://api.flutter.dev/flutter/services/JSONMessageCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*
* Supports values accepted by `NSJSONSerialization` plus top-level
* `nil`, `NSNumber`, and `NSString`.
*
* On the Dart side, JSON messages are handled by the JSON facilities of the
* [`dart:convert`](https://api.dartlang.org/stable/dart-convert/JSON-constant.html)
* package.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterJSONMessageCodec : NSObject <FlutterMessageCodec>
@end
/**
* A writer of the Flutter standard binary encoding.
*
* See `FlutterStandardMessageCodec` for details on the encoding.
*
* The encoding is extensible via subclasses overriding `writeValue`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardWriter : NSObject
/**
* Create a `FlutterStandardWriter` who will write to \p data.
*/
- (instancetype)initWithData:(NSMutableData*)data;
/** Write a 8-bit byte. */
- (void)writeByte:(UInt8)value;
/** Write an array of \p bytes of size \p length. */
- (void)writeBytes:(const void*)bytes length:(NSUInteger)length;
/** Write an array of bytes contained in \p data. */
- (void)writeData:(NSData*)data;
/** Write 32-bit unsigned integer that represents a \p size of a collection. */
- (void)writeSize:(UInt32)size;
/** Write zero padding until data is aligned with \p alignment. */
- (void)writeAlignment:(UInt8)alignment;
/** Write a string with UTF-8 encoding. */
- (void)writeUTF8:(NSString*)value;
/** Introspects into an object and writes its representation.
*
* Supported Data Types:
* - NSNull
* - NSNumber
* - NSString (as UTF-8)
* - FlutterStandardTypedData
* - NSArray of supported types
* - NSDictionary of supporte types
*
* NSAsserts on failure.
*/
- (void)writeValue:(id)value;
@end
/**
* A reader of the Flutter standard binary encoding.
*
* See `FlutterStandardMessageCodec` for details on the encoding.
*
* The encoding is extensible via subclasses overriding `readValueOfType`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardReader : NSObject
/**
* Create a new `FlutterStandardReader` who reads from \p data.
*/
- (instancetype)initWithData:(NSData*)data;
/** Returns YES when the reader hasn't reached the end of its data. */
- (BOOL)hasMore;
/** Reads a byte value and increments the position. */
- (UInt8)readByte;
/** Reads a sequence of byte values of \p length and increments the position. */
- (void)readBytes:(void*)destination length:(NSUInteger)length;
/** Reads a sequence of byte values of \p length and increments the position. */
- (NSData*)readData:(NSUInteger)length;
/** Reads a 32-bit unsigned integer representing a collection size and increments the position.*/
- (UInt32)readSize;
/** Advances the read position until it is aligned with \p alignment. */
- (void)readAlignment:(UInt8)alignment;
/** Read a null terminated string encoded with UTF-8/ */
- (NSString*)readUTF8;
/**
* Reads a byte for `FlutterStandardField` the decodes a value matching that type.
*
* See also: -[FlutterStandardWriter writeValue]
*/
- (nullable id)readValue;
/**
* Decodes a value matching the \p type specified.
*
* See also:
* - `FlutterStandardField`
* - `-[FlutterStandardWriter writeValue]`
*/
- (nullable id)readValueOfType:(UInt8)type;
@end
/**
* A factory of compatible reader/writer instances using the Flutter standard
* binary encoding or extensions thereof.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardReaderWriter : NSObject
/**
* Create a new `FlutterStandardWriter` for writing to \p data.
*/
- (FlutterStandardWriter*)writerWithData:(NSMutableData*)data;
/**
* Create a new `FlutterStandardReader` for reading from \p data.
*/
- (FlutterStandardReader*)readerWithData:(NSData*)data;
@end
/**
* A `FlutterMessageCodec` using the Flutter standard binary encoding.
*
* This codec is guaranteed to be compatible with the corresponding
* [StandardMessageCodec](https://api.flutter.dev/flutter/services/StandardMessageCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*
* Supported messages are acyclic values of these forms:
*
* - `nil` or `NSNull`
* - `NSNumber` (including their representation of Boolean values)
* - `NSString`
* - `FlutterStandardTypedData`
* - `NSArray` of supported values
* - `NSDictionary` with supported keys and values
*
* On the Dart side, these values are represented as follows:
*
* - `nil` or `NSNull`: null
* - `NSNumber`: `bool`, `int`, or `double`, depending on the contained value.
* - `NSString`: `String`
* - `FlutterStandardTypedData`: `Uint8List`, `Int32List`, `Int64List`, or `Float64List`
* - `NSArray`: `List`
* - `NSDictionary`: `Map`
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardMessageCodec : NSObject <FlutterMessageCodec>
/**
* Create a `FlutterStandardMessageCodec` who will read and write to \p readerWriter.
*/
+ (instancetype)codecWithReaderWriter:(FlutterStandardReaderWriter*)readerWriter;
@end
/**
* Command object representing a method call on a `FlutterMethodChannel`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterMethodCall : NSObject
/**
* Creates a method call for invoking the specified named method with the
* specified arguments.
*
* @param method the name of the method to call.
* @param arguments the arguments value.
*/
+ (instancetype)methodCallWithMethodName:(NSString*)method arguments:(id _Nullable)arguments;
/**
* The method name.
*/
@property(readonly, nonatomic) NSString* method;
/**
* The arguments.
*/
@property(readonly, nonatomic, nullable) id arguments;
@end
/**
* Error object representing an unsuccessful outcome of invoking a method
* on a `FlutterMethodChannel`, or an error event on a `FlutterEventChannel`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterError : NSObject
/**
* Creates a `FlutterError` with the specified error code, message, and details.
*
* @param code An error code string for programmatic use.
* @param message A human-readable error message.
* @param details Custom error details.
*/
+ (instancetype)errorWithCode:(NSString*)code
message:(NSString* _Nullable)message
details:(id _Nullable)details;
/**
The error code.
*/
@property(readonly, nonatomic) NSString* code;
/**
The error message.
*/
@property(readonly, nonatomic, nullable) NSString* message;
/**
The error details.
*/
@property(readonly, nonatomic, nullable) id details;
@end
/**
* Type of numeric data items encoded in a `FlutterStandardDataType`.
*
* - FlutterStandardDataTypeUInt8: plain bytes
* - FlutterStandardDataTypeInt32: 32-bit signed integers
* - FlutterStandardDataTypeInt64: 64-bit signed integers
* - FlutterStandardDataTypeFloat64: 64-bit floats
*/
typedef NS_ENUM(NSInteger, FlutterStandardDataType) {
// NOLINTBEGIN(readability-identifier-naming)
FlutterStandardDataTypeUInt8,
FlutterStandardDataTypeInt32,
FlutterStandardDataTypeInt64,
FlutterStandardDataTypeFloat32,
FlutterStandardDataTypeFloat64,
// NOLINTEND(readability-identifier-naming)
};
/**
* A byte buffer holding `UInt8`, `SInt32`, `SInt64`, or `Float64` values, used
* with `FlutterStandardMessageCodec` and `FlutterStandardMethodCodec`.
*
* Two's complement encoding is used for signed integers. IEEE754
* double-precision representation is used for floats. The platform's native
* endianness is assumed.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardTypedData : NSObject
/**
* Creates a `FlutterStandardTypedData` which interprets the specified data
* as plain bytes.
*
* @param data the byte data.
*/
+ (instancetype)typedDataWithBytes:(NSData*)data;
/**
* Creates a `FlutterStandardTypedData` which interprets the specified data
* as 32-bit signed integers.
*
* @param data the byte data. The length must be divisible by 4.
*/
+ (instancetype)typedDataWithInt32:(NSData*)data;
/**
* Creates a `FlutterStandardTypedData` which interprets the specified data
* as 64-bit signed integers.
*
* @param data the byte data. The length must be divisible by 8.
*/
+ (instancetype)typedDataWithInt64:(NSData*)data;
/**
* Creates a `FlutterStandardTypedData` which interprets the specified data
* as 32-bit floats.
*
* @param data the byte data. The length must be divisible by 8.
*/
+ (instancetype)typedDataWithFloat32:(NSData*)data;
/**
* Creates a `FlutterStandardTypedData` which interprets the specified data
* as 64-bit floats.
*
* @param data the byte data. The length must be divisible by 8.
*/
+ (instancetype)typedDataWithFloat64:(NSData*)data;
/**
* The raw underlying data buffer.
*/
@property(readonly, nonatomic) NSData* data;
/**
* The type of the encoded values.
*/
@property(readonly, nonatomic, assign) FlutterStandardDataType type;
/**
* The number of value items encoded.
*/
@property(readonly, nonatomic, assign) UInt32 elementCount;
/**
* The number of bytes used by the encoding of a single value item.
*/
@property(readonly, nonatomic, assign) UInt8 elementSize;
@end
/**
* An arbitrarily large integer value, used with `FlutterStandardMessageCodec`
* and `FlutterStandardMethodCodec`.
*/
FLUTTER_DARWIN_EXPORT
FLUTTER_UNAVAILABLE("Unavailable on 2018-08-31. Deprecated on 2018-01-09. "
"FlutterStandardBigInteger was needed because the Dart 1.0 int type had no "
"size limit. With Dart 2.0, the int type is a fixed-size, 64-bit signed "
"integer. If you need to communicate larger integers, use NSString encoding "
"instead.")
@interface FlutterStandardBigInteger : NSObject
@end
/**
* A codec for method calls and enveloped results.
*
* Method calls are encoded as binary messages with enough structure that the
* codec can extract a method name `NSString` and an arguments `NSObject`,
* possibly `nil`. These data items are used to populate a `FlutterMethodCall`.
*
* Result envelopes are encoded as binary messages with enough structure that
* the codec can determine whether the result was successful or an error. In
* the former case, the codec can extract the result `NSObject`, possibly `nil`.
* In the latter case, the codec can extract an error code `NSString`, a
* human-readable `NSString` error message (possibly `nil`), and a custom
* error details `NSObject`, possibly `nil`. These data items are used to
* populate a `FlutterError`.
*/
FLUTTER_DARWIN_EXPORT
@protocol FlutterMethodCodec
/**
* Provides access to a shared instance this codec.
*
* @return The shared instance.
*/
+ (instancetype)sharedInstance;
/**
* Encodes the specified method call into binary.
*
* @param methodCall The method call. The arguments value
* must be supported by this codec.
* @return The binary encoding.
*/
- (NSData*)encodeMethodCall:(FlutterMethodCall*)methodCall;
/**
* Decodes the specified method call from binary.
*
* @param methodCall The method call to decode.
* @return The decoded method call.
*/
- (FlutterMethodCall*)decodeMethodCall:(NSData*)methodCall;
/**
* Encodes the specified successful result into binary.
*
* @param result The result. Must be a value supported by this codec.
* @return The binary encoding.
*/
- (NSData*)encodeSuccessEnvelope:(id _Nullable)result;
/**
* Encodes the specified error result into binary.
*
* @param error The error object. The error details value must be supported
* by this codec.
* @return The binary encoding.
*/
- (NSData*)encodeErrorEnvelope:(FlutterError*)error;
/**
* Deccodes the specified result envelope from binary.
*
* @param envelope The error object.
* @return The result value, if the envelope represented a successful result,
* or a `FlutterError` instance, if not.
*/
- (id _Nullable)decodeEnvelope:(NSData*)envelope;
@end
/**
* A `FlutterMethodCodec` using UTF-8 encoded JSON method calls and result
* envelopes.
*
* This codec is guaranteed to be compatible with the corresponding
* [JSONMethodCodec](https://api.flutter.dev/flutter/services/JSONMethodCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*
* Values supported as methods arguments and result payloads are
* those supported as top-level or leaf values by `FlutterJSONMessageCodec`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterJSONMethodCodec : NSObject <FlutterMethodCodec>
@end
/**
* A `FlutterMethodCodec` using the Flutter standard binary encoding.
*
* This codec is guaranteed to be compatible with the corresponding
* [StandardMethodCodec](https://api.flutter.dev/flutter/services/StandardMethodCodec-class.html)
* on the Dart side. These parts of the Flutter SDK are evolved synchronously.
*
* Values supported as method arguments and result payloads are those supported by
* `FlutterStandardMessageCodec`.
*/
FLUTTER_DARWIN_EXPORT
@interface FlutterStandardMethodCodec : NSObject <FlutterMethodCodec>
/**
* Create a `FlutterStandardMethodCodec` who will read and write to \p readerWriter.
*/
+ (instancetype)codecWithReaderWriter:(FlutterStandardReaderWriter*)readerWriter;
@end
NS_ASSUME_NONNULL_END
#endif // FLUTTER_SHELL_PLATFORM_DARWIN_COMMON_FRAMEWORK_HEADERS_FLUTTERCODECS_H_