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feat(ios): add KrollPromise to expose ES6 promises natively
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iphone/TitaniumKit/TitaniumKit/Sources/Kroll/KrollPromise.h
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,30 @@ | ||
| /** | ||
| * Appcelerator Titanium Mobile | ||
| * Copyright (c) 2020-Present by Appcelerator, Inc. All Rights Reserved. | ||
| * Licensed under the terms of the Apache Public License | ||
| * Please see the LICENSE included with this distribution for details. | ||
| */ | ||
| #ifndef KrollPromise_h | ||
| #define KrollPromise_h | ||
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| #import <JavaScriptCore/JavaScriptCore.h> | ||
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| @interface KrollPromise : NSObject { | ||
| @private | ||
| JSValue *resolveFunc; | ||
| JSValue *rejectFunc; | ||
| } | ||
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| @property (readonly) JSValue *JSValue; | ||
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| - (void)resolve:(NSArray *)arguments; | ||
| - (void)reject:(NSArray *)arguments; | ||
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| - (KrollPromise *)initInContext:(JSContext *)context; | ||
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| + (JSValue *)resolved:(NSArray *)arguments inContext:(JSContext *)context; | ||
| + (JSValue *)rejected:(NSArray *)arguments inContext:(JSContext *)context; | ||
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| @end | ||
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| #endif /* KrollPromise_h */ |
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iphone/TitaniumKit/TitaniumKit/Sources/Kroll/KrollPromise.m
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| #import "KrollPromise.h" | ||
| #import "TiExceptionHandler.h" | ||
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| @implementation KrollPromise | ||
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| - (KrollPromise *)initInContext:(JSContext *)context | ||
| { | ||
| if (self = [super init]) { | ||
| if (@available(iOS 13, *)) { | ||
| // Use iOS 13 APIs. | ||
| JSObjectRef resolve; | ||
| JSObjectRef reject; | ||
| JSValueRef exception = NULL; | ||
| _JSValue = [JSValue valueWithJSValueRef:JSObjectMakeDeferredPromise(context.JSGlobalContextRef, &resolve, &reject, &exception) inContext:context]; | ||
| if (exception) { | ||
| // report exception | ||
| [TiExceptionHandler.defaultExceptionHandler reportScriptError:[JSValue valueWithJSValueRef:exception inContext:context] inJSContext:context]; | ||
| } | ||
| resolveFunc = [[JSValue valueWithJSValueRef:resolve inContext:context] retain]; | ||
| rejectFunc = [[JSValue valueWithJSValueRef:reject inContext:context] retain]; | ||
| } else { | ||
| // Alternative code for earlier versions of iOS. We hack it by evaluating JS | ||
| // TODO: I assume this is pretty slow. Can we re-use eval'd values here? | ||
| JSValue *executor = [context evaluateScript:@"function executor(resolve, reject) { executor.resolve = resolve; executor.reject = reject; }\nexecutor;"]; | ||
| JSValue *exception = context.exception; | ||
| if (exception != nil) { | ||
| [TiExceptionHandler.defaultExceptionHandler reportScriptError:exception inJSContext:context]; | ||
| } | ||
| JSValue *createPromise = [context evaluateScript:@"function createPromise(executor) { console.log(executor); return new Promise(executor); }\ncreatePromise;"]; | ||
| exception = context.exception; | ||
| if (exception != nil) { | ||
| [TiExceptionHandler.defaultExceptionHandler reportScriptError:exception inJSContext:context]; | ||
| } | ||
| _JSValue = [createPromise callWithArguments:@[ executor ]]; | ||
| resolveFunc = [executor[@"resolve"] retain]; | ||
| rejectFunc = [executor[@"reject"] retain]; | ||
| } | ||
| } | ||
| return self; | ||
| } | ||
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| + (JSValue *)resolved:(NSArray *)arguments inContext:(JSContext *)context | ||
| { | ||
| KrollPromise *promise = [[KrollPromise alloc] initInContext:context]; | ||
| [promise resolve:arguments]; | ||
| return promise.JSValue; | ||
| } | ||
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| + (JSValue *)rejected:(NSArray *)arguments inContext:(JSContext *)context | ||
| { | ||
| KrollPromise *promise = [[KrollPromise alloc] initInContext:context]; | ||
| [promise reject:arguments]; | ||
| return promise.JSValue; | ||
| } | ||
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| - (void)resolve:(NSArray *)arguments | ||
| { | ||
| [resolveFunc callWithArguments:arguments]; | ||
| } | ||
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| - (void)reject:(NSArray *)arguments | ||
| { | ||
| [rejectFunc callWithArguments:arguments]; | ||
| } | ||
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| - (void)dealloc | ||
| { | ||
| [resolveFunc release]; | ||
| [rejectFunc release]; | ||
| [super dealloc]; | ||
| } | ||
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| @end |