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FlutterEngineGroup.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_HEADERS_FLUTTERENGINEGROUP_H_
6 #define FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_HEADERS_FLUTTERENGINEGROUP_H_
7
8 #import <Foundation/Foundation.h>
9
10 #import "FlutterEngine.h"
11
12 NS_ASSUME_NONNULL_BEGIN
13
14 /** Options that control how a FlutterEngine should be created. */
15 FLUTTER_DARWIN_EXPORT
16 @interface FlutterEngineGroupOptions : NSObject
17
18 /**
19 * The name of a top-level function from a Dart library. If this is FlutterDefaultDartEntrypoint
20 * (or nil); this will default to `main()`. If it is not the app's main() function, that function
21 * must be decorated with `@pragma(vm:entry-point)` to ensure themethod is not tree-shaken by the
22 * Dart compiler.
23 */
24 @property(nonatomic, copy, nullable) NSString* entrypoint;
25
26 /**
27 * The URI of the Dart library which contains the entrypoint method. If nil, this will default to
28 * the same library as the `main()` function in the Dart program.
29 */
30 @property(nonatomic, copy, nullable) NSString* libraryURI;
31
32 /**
33 * The name of the initial Flutter `Navigator` `Route` to load. If this is
34 * FlutterDefaultInitialRoute (or nil), it will default to the "/" route.
35 */
36 @property(nonatomic, copy, nullable) NSString* initialRoute;
37
38 /**
39 * Arguments passed as a list of string to Dart's entrypoint function.
40 */
41 @property(nonatomic, copy, nullable) NSArray<NSString*>* entrypointArgs;
42 @end
43
44 /**
45 * Represents a collection of FlutterEngines who share resources which allows
46 * them to be created with less time const and occupy less memory than just
47 * creating multiple FlutterEngines.
48 *
49 * Deleting a FlutterEngineGroup doesn't invalidate existing FlutterEngines, but
50 * it eliminates the possibility to create more FlutterEngines in that group.
51 *
52 * @warning This class is a work-in-progress and may change.
53 * @see https://github.com/flutter/flutter/issues/72009
54 */
55 FLUTTER_DARWIN_EXPORT
56 @interface FlutterEngineGroup : NSObject
57 - (instancetype)init NS_UNAVAILABLE;
58
59 /**
60 * Initialize a new FlutterEngineGroup.
61 *
62 * @param name The name that will present in the threads shared across the
63 * engines in this group.
64 * @param project The `FlutterDartProject` that all FlutterEngines in this group
65 * will be executing.
66 */
67 - (instancetype)initWithName:(NSString*)name
68 project:(nullable FlutterDartProject*)project NS_DESIGNATED_INITIALIZER;
69
70 /**
71 * Creates a running `FlutterEngine` that shares components with this group.
72 *
73 * @param entrypoint The name of a top-level function from a Dart library. If this is
74 * FlutterDefaultDartEntrypoint (or nil); this will default to `main()`. If it is not the app's
75 * main() function, that function must be decorated with `@pragma(vm:entry-point)` to ensure the
76 * method is not tree-shaken by the Dart compiler.
77 * @param libraryURI The URI of the Dart library which contains the entrypoint method. IF nil,
78 * this will default to the same library as the `main()` function in the Dart program.
79 *
80 * @see FlutterEngineGroup
81 */
82 - (FlutterEngine*)makeEngineWithEntrypoint:(nullable NSString*)entrypoint
83 libraryURI:(nullable NSString*)libraryURI;
84
85 /**
86 * Creates a running `FlutterEngine` that shares components with this group.
87 *
88 * @param entrypoint The name of a top-level function from a Dart library. If this is
89 * FlutterDefaultDartEntrypoint (or nil); this will default to `main()`. If it is not the app's
90 * main() function, that function must be decorated with `@pragma(vm:entry-point)` to ensure the
91 * method is not tree-shaken by the Dart compiler.
92 * @param libraryURI The URI of the Dart library which contains the entrypoint method. IF nil,
93 * this will default to the same library as the `main()` function in the Dart program.
94 * @param initialRoute The name of the initial Flutter `Navigator` `Route` to load. If this is
95 * FlutterDefaultInitialRoute (or nil), it will default to the "/" route.
96 *
97 * @see FlutterEngineGroup
98 */
99 - (FlutterEngine*)makeEngineWithEntrypoint:(nullable NSString*)entrypoint
100 libraryURI:(nullable NSString*)libraryURI
101 initialRoute:(nullable NSString*)initialRoute;
102
103 /**
104 * Creates a running `FlutterEngine` that shares components with this group.
105 *
106 * @param options Options that control how a FlutterEngine should be created.
107 *
108 * @see FlutterEngineGroupOptions
109 */
110 - (FlutterEngine*)makeEngineWithOptions:(nullable FlutterEngineGroupOptions*)options;
111 @end
112
113 NS_ASSUME_NONNULL_END
114
115 #endif // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_HEADERS_FLUTTERENGINEGROUP_H_
FlutterEngine
Definition: FlutterEngine.h:61
FlutterEngine.h
FlutterEngineGroupOptions::libraryURI
NSString * libraryURI
Definition: FlutterEngineGroup.h:30
NS_ASSUME_NONNULL_END
#define NS_ASSUME_NONNULL_END
Definition: FlutterMacros.h:20
NS_ASSUME_NONNULL_BEGIN
#define NS_ASSUME_NONNULL_BEGIN
Definition: FlutterMacros.h:19
FlutterEngineGroupOptions::entrypoint
NSString * entrypoint
Definition: FlutterEngineGroup.h:24
FlutterEngineGroupOptions::initialRoute
NSString * initialRoute
Definition: FlutterEngineGroup.h:36
FlutterEngineGroupOptions
Definition: FlutterEngineGroup.h:16
NS_UNAVAILABLE
instancetype init NS_UNAVAILABLE
Definition: FlutterTextInputPlugin.h:169
FLUTTER_DARWIN_EXPORT
#define FLUTTER_DARWIN_EXPORT
Definition: FlutterMacros.h:14
FlutterEngineGroupOptions::entrypointArgs
NSArray< NSString * > * entrypointArgs
Definition: FlutterEngineGroup.h:41
FlutterDartProject
Definition: FlutterDartProject.mm:258
FlutterEngineGroup
Definition: FlutterEngineGroup.h:56