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[camera] Initial iOS Pigeon conversion (#6553)
Converts one platform channel method to Pigeon, setting up all the Pigeon plumbing and test scaffolding. The Camera API surface is relatively large, so this lays a foundation for incremental conversion, minimizing the mixing of Pigeon setup with the individual method conversions. Part of flutter/flutter#117905
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60 changes: 60 additions & 0 deletions
60
packages/camera/camera_avfoundation/ios/Classes/messages.g.h
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // 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. | ||
| // Autogenerated from Pigeon (v18.0.0), do not edit directly. | ||
| // See also: https://pub.dev/packages/pigeon | ||
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| #import <Foundation/Foundation.h> | ||
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| @protocol FlutterBinaryMessenger; | ||
| @protocol FlutterMessageCodec; | ||
| @class FlutterError; | ||
| @class FlutterStandardTypedData; | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| typedef NS_ENUM(NSUInteger, FCPPlatformCameraLensDirection) { | ||
| /// Front facing camera (a user looking at the screen is seen by the camera). | ||
| FCPPlatformCameraLensDirectionFront = 0, | ||
| /// Back facing camera (a user looking at the screen is not seen by the camera). | ||
| FCPPlatformCameraLensDirectionBack = 1, | ||
| /// External camera which may not be mounted to the device. | ||
| FCPPlatformCameraLensDirectionExternal = 2, | ||
| }; | ||
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| /// Wrapper for FCPPlatformCameraLensDirection to allow for nullability. | ||
| @interface FCPPlatformCameraLensDirectionBox : NSObject | ||
| @property(nonatomic, assign) FCPPlatformCameraLensDirection value; | ||
| - (instancetype)initWithValue:(FCPPlatformCameraLensDirection)value; | ||
| @end | ||
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| @class FCPPlatformCameraDescription; | ||
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| @interface FCPPlatformCameraDescription : NSObject | ||
| /// `init` unavailable to enforce nonnull fields, see the `make` class method. | ||
| - (instancetype)init NS_UNAVAILABLE; | ||
| + (instancetype)makeWithName:(NSString *)name | ||
| lensDirection:(FCPPlatformCameraLensDirection)lensDirection; | ||
| /// The name of the camera device. | ||
| @property(nonatomic, copy) NSString *name; | ||
| /// The direction the camera is facing. | ||
| @property(nonatomic, assign) FCPPlatformCameraLensDirection lensDirection; | ||
| @end | ||
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| /// The codec used by FCPCameraApi. | ||
| NSObject<FlutterMessageCodec> *FCPCameraApiGetCodec(void); | ||
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| @protocol FCPCameraApi | ||
| /// Returns the list of available cameras. | ||
| - (void)availableCamerasWithCompletion:(void (^)(NSArray<FCPPlatformCameraDescription *> *_Nullable, | ||
| FlutterError *_Nullable))completion; | ||
| @end | ||
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| extern void SetUpFCPCameraApi(id<FlutterBinaryMessenger> binaryMessenger, | ||
| NSObject<FCPCameraApi> *_Nullable api); | ||
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| extern void SetUpFCPCameraApiWithSuffix(id<FlutterBinaryMessenger> binaryMessenger, | ||
| NSObject<FCPCameraApi> *_Nullable api, | ||
| NSString *messageChannelSuffix); | ||
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| NS_ASSUME_NONNULL_END |
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packages/camera/camera_avfoundation/ios/Classes/messages.g.m
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| // 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. | ||
| // Autogenerated from Pigeon (v18.0.0), do not edit directly. | ||
| // See also: https://pub.dev/packages/pigeon | ||
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| #import "messages.g.h" | ||
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| #if TARGET_OS_OSX | ||
| #import <FlutterMacOS/FlutterMacOS.h> | ||
| #else | ||
| #import <Flutter/Flutter.h> | ||
| #endif | ||
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| #if !__has_feature(objc_arc) | ||
| #error File requires ARC to be enabled. | ||
| #endif | ||
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| static NSArray *wrapResult(id result, FlutterError *error) { | ||
| if (error) { | ||
| return @[ | ||
| error.code ?: [NSNull null], error.message ?: [NSNull null], error.details ?: [NSNull null] | ||
| ]; | ||
| } | ||
| return @[ result ?: [NSNull null] ]; | ||
| } | ||
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| static id GetNullableObjectAtIndex(NSArray *array, NSInteger key) { | ||
| id result = array[key]; | ||
| return (result == [NSNull null]) ? nil : result; | ||
| } | ||
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| @implementation FCPPlatformCameraLensDirectionBox | ||
| - (instancetype)initWithValue:(FCPPlatformCameraLensDirection)value { | ||
| self = [super init]; | ||
| if (self) { | ||
| _value = value; | ||
| } | ||
| return self; | ||
| } | ||
| @end | ||
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| @interface FCPPlatformCameraDescription () | ||
| + (FCPPlatformCameraDescription *)fromList:(NSArray *)list; | ||
| + (nullable FCPPlatformCameraDescription *)nullableFromList:(NSArray *)list; | ||
| - (NSArray *)toList; | ||
| @end | ||
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| @implementation FCPPlatformCameraDescription | ||
| + (instancetype)makeWithName:(NSString *)name | ||
| lensDirection:(FCPPlatformCameraLensDirection)lensDirection { | ||
| FCPPlatformCameraDescription *pigeonResult = [[FCPPlatformCameraDescription alloc] init]; | ||
| pigeonResult.name = name; | ||
| pigeonResult.lensDirection = lensDirection; | ||
| return pigeonResult; | ||
| } | ||
| + (FCPPlatformCameraDescription *)fromList:(NSArray *)list { | ||
| FCPPlatformCameraDescription *pigeonResult = [[FCPPlatformCameraDescription alloc] init]; | ||
| pigeonResult.name = GetNullableObjectAtIndex(list, 0); | ||
| pigeonResult.lensDirection = [GetNullableObjectAtIndex(list, 1) integerValue]; | ||
| return pigeonResult; | ||
| } | ||
| + (nullable FCPPlatformCameraDescription *)nullableFromList:(NSArray *)list { | ||
| return (list) ? [FCPPlatformCameraDescription fromList:list] : nil; | ||
| } | ||
| - (NSArray *)toList { | ||
| return @[ | ||
| self.name ?: [NSNull null], | ||
| @(self.lensDirection), | ||
| ]; | ||
| } | ||
| @end | ||
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| @interface FCPCameraApiCodecReader : FlutterStandardReader | ||
| @end | ||
| @implementation FCPCameraApiCodecReader | ||
| - (nullable id)readValueOfType:(UInt8)type { | ||
| switch (type) { | ||
| case 128: | ||
| return [FCPPlatformCameraDescription fromList:[self readValue]]; | ||
| default: | ||
| return [super readValueOfType:type]; | ||
| } | ||
| } | ||
| @end | ||
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| @interface FCPCameraApiCodecWriter : FlutterStandardWriter | ||
| @end | ||
| @implementation FCPCameraApiCodecWriter | ||
| - (void)writeValue:(id)value { | ||
| if ([value isKindOfClass:[FCPPlatformCameraDescription class]]) { | ||
| [self writeByte:128]; | ||
| [self writeValue:[value toList]]; | ||
| } else { | ||
| [super writeValue:value]; | ||
| } | ||
| } | ||
| @end | ||
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| @interface FCPCameraApiCodecReaderWriter : FlutterStandardReaderWriter | ||
| @end | ||
| @implementation FCPCameraApiCodecReaderWriter | ||
| - (FlutterStandardWriter *)writerWithData:(NSMutableData *)data { | ||
| return [[FCPCameraApiCodecWriter alloc] initWithData:data]; | ||
| } | ||
| - (FlutterStandardReader *)readerWithData:(NSData *)data { | ||
| return [[FCPCameraApiCodecReader alloc] initWithData:data]; | ||
| } | ||
| @end | ||
|
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| NSObject<FlutterMessageCodec> *FCPCameraApiGetCodec(void) { | ||
| static FlutterStandardMessageCodec *sSharedObject = nil; | ||
| static dispatch_once_t sPred = 0; | ||
| dispatch_once(&sPred, ^{ | ||
| FCPCameraApiCodecReaderWriter *readerWriter = [[FCPCameraApiCodecReaderWriter alloc] init]; | ||
| sSharedObject = [FlutterStandardMessageCodec codecWithReaderWriter:readerWriter]; | ||
| }); | ||
| return sSharedObject; | ||
| } | ||
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| void SetUpFCPCameraApi(id<FlutterBinaryMessenger> binaryMessenger, NSObject<FCPCameraApi> *api) { | ||
| SetUpFCPCameraApiWithSuffix(binaryMessenger, api, @""); | ||
| } | ||
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| void SetUpFCPCameraApiWithSuffix(id<FlutterBinaryMessenger> binaryMessenger, | ||
| NSObject<FCPCameraApi> *api, NSString *messageChannelSuffix) { | ||
| messageChannelSuffix = messageChannelSuffix.length > 0 | ||
| ? [NSString stringWithFormat:@".%@", messageChannelSuffix] | ||
| : @""; | ||
| /// Returns the list of available cameras. | ||
| { | ||
| FlutterBasicMessageChannel *channel = [[FlutterBasicMessageChannel alloc] | ||
| initWithName:[NSString stringWithFormat:@"%@%@", | ||
| @"dev.flutter.pigeon.camera_avfoundation." | ||
| @"CameraApi.getAvailableCameras", | ||
| messageChannelSuffix] | ||
| binaryMessenger:binaryMessenger | ||
| codec:FCPCameraApiGetCodec()]; | ||
| if (api) { | ||
| NSCAssert( | ||
| [api respondsToSelector:@selector(availableCamerasWithCompletion:)], | ||
| @"FCPCameraApi api (%@) doesn't respond to @selector(availableCamerasWithCompletion:)", | ||
| api); | ||
| [channel setMessageHandler:^(id _Nullable message, FlutterReply callback) { | ||
| [api availableCamerasWithCompletion:^( | ||
| NSArray<FCPPlatformCameraDescription *> *_Nullable output, | ||
| FlutterError *_Nullable error) { | ||
| callback(wrapResult(output, error)); | ||
| }]; | ||
| }]; | ||
| } else { | ||
| [channel setMessageHandler:nil]; | ||
| } | ||
| } | ||
| } |
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