API/tests/CurrentThisInsideBlockGetterTest.mm

   1 /*
   2  * Copyright (C) 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "CurrentThisInsideBlockGetterTest.h"
  27
  28 #if JSC_OBJC_API_ENABLED
  29
  30 #import <Foundation/Foundation.h>
  31 #import <JavaScriptCore/JavaScriptCore.h>
  32
  33 static JSObjectRef CallAsConstructor(JSContextRef ctx, JSObjectRef constructor, size_t, const JSValueRef[], JSValueRef*)
  34 {
  35     JSObjectRef newObjectRef = NULL;
  36     NSMutableDictionary *constructorPrivateProperties = (__bridge NSMutableDictionary *)(JSObjectGetPrivate(constructor));
  37     NSDictionary *constructorDescriptor = constructorPrivateProperties[@"constructorDescriptor"];
  38     newObjectRef = JSObjectMake(ctx, NULL, NULL);
  39     NSDictionary *objectProperties = constructorDescriptor[@"objectProperties"];
  40
  41     if (objectProperties) {
  42         JSValue *newObject = [JSValue valueWithJSValueRef:newObjectRef inContext:[JSContext contextWithJSGlobalContextRef:JSContextGetGlobalContext(ctx)]];
  43         for (NSString *objectProperty in objectProperties) {
  44             [newObject defineProperty:objectProperty descriptor:objectProperties[objectProperty]];
  45         }
  46     }
  47
  48     return newObjectRef;
  49 }
  50
  51 static void ConstructorFinalize(JSObjectRef object)
  52 {
  53     NSMutableDictionary *privateProperties = (__bridge NSMutableDictionary *)(JSObjectGetPrivate(object));
  54     CFBridgingRelease((__bridge CFTypeRef)(privateProperties));
  55     JSObjectSetPrivate(object, NULL);
  56 }
  57
  58 static JSClassRef ConstructorClass(void)
  59 {
  60     static JSClassRef constructorClass = NULL;
  61
  62     if (constructorClass == NULL) {
  63         JSClassDefinition classDefinition = kJSClassDefinitionEmpty;
  64         classDefinition.className = "Constructor";
  65         classDefinition.callAsConstructor = CallAsConstructor;
  66         classDefinition.finalize = ConstructorFinalize;
  67         constructorClass = JSClassCreate(&classDefinition);
  68     }
  69
  70     return constructorClass;
  71 }
  72
  73 @interface JSValue (ConstructorCreation)
  74
  75 + (JSValue *)valueWithConstructorDescriptor:(NSDictionary *)constructorDescriptor inContext:(JSContext *)context;
  76
  77 @end
  78
  79 @implementation JSValue (ConstructorCreation)
  80
  81 + (JSValue *)valueWithConstructorDescriptor:(id)constructorDescriptor inContext:(JSContext *)context
  82 {
  83     NSMutableDictionary *privateProperties = [@{ @"constructorDescriptor" : constructorDescriptor } mutableCopy];
  84     JSGlobalContextRef ctx = [context JSGlobalContextRef];
  85     JSObjectRef constructorRef = JSObjectMake(ctx, ConstructorClass(), (void *)CFBridgingRetain(privateProperties));
  86     JSValue *constructor = [JSValue valueWithJSValueRef:constructorRef inContext:context];
  87     return constructor;
  88 }
  89
  90 @end
  91
  92 @interface JSContext (ConstructorCreation)
  93
  94 - (JSValue *)valueWithConstructorDescriptor:(NSDictionary *)constructorDescriptor;
  95
  96 @end
  97
  98 @implementation JSContext (ConstructorCreation)
  99
 100 - (JSValue *)valueWithConstructorDescriptor:(id)constructorDescriptor
 101 {
 102     return [JSValue valueWithConstructorDescriptor:constructorDescriptor inContext:self];
 103 }
 104
 105 @end
 106
 107 void currentThisInsideBlockGetterTest()
 108 {
 109     @autoreleasepool {
 110         JSContext *context = [[JSContext alloc] init];
 111
 112         JSValue *myConstructor = [context valueWithConstructorDescriptor:@{
 113             @"objectProperties" : @{
 114                 @"currentThis" : @{ JSPropertyDescriptorGetKey : ^{ return JSContext.currentThis; } },
 115             },
 116         }];
 117
 118         JSValue *myObj1 = [myConstructor constructWithArguments:nil];
 119         NSLog(@"myObj1.currentThis: %@", myObj1[@"currentThis"]);
 120         JSValue *myObj2 = [myConstructor constructWithArguments:@[ @"bar" ]];
 121         NSLog(@"myObj2.currentThis: %@", myObj2[@"currentThis"]);
 122     }
 123 }
 124
 125 #endif // JSC_OBJC_API_ENABLED