OOJavaScriptEngine Class Reference

#include <OOJavaScriptEngine.h>

Inheritance diagram for OOJavaScriptEngine:

Collaboration diagram for OOJavaScriptEngine:

Instance Methods
(JSObject *)	- globalObject
(void)	- runMissionCallback
(BOOL)	- reset
(BOOL)	- callJSFunction:forObject:argc:argv:result:
(void)	- removeGCObjectRoot:
(void)	- removeGCValueRoot:
(void)	- garbageCollectionOpportunity:
(BOOL)	- showErrorLocations
(void)	- setShowErrorLocations:
(JSClass *)	- objectClass
(JSClass *)	- stringClass
(JSClass *)	- arrayClass
(JSClass *)	- numberClass
(JSClass *)	- booleanClass
(BOOL)	- dumpStackForErrors
(void)	- setDumpStackForErrors:
(BOOL)	- dumpStackForWarnings
(void)	- setDumpStackForWarnings:
(void)	- enableDebuggerStatement
(id)	- init [implementation]
(void)	- createMainThreadContext [implementation]
(void)	- destroyMainThreadContext [implementation]
(void)	- dealloc [implementation]
(BOOL)	- lookUpStandardClassPointers [implementation]
(void)	- registerStandardObjectConverters [implementation]
(void)	- setMonitor: [implementation]
(void)	- sendMonitorError:withMessage:inContext: [implementation]
(void)	- sendMonitorLogMessage:withMessageClass:inContext: [implementation]
(void)	- sendMonitorLogMessage:withMessageClass:inContext: [implementation]
(void)	- watchdogTimerThread [implementation]

Class Methods
(OOJavaScriptEngine *)	+ sharedEngine
(static JSTrapStatus)	+ DebuggerHook [implementation]

Private Attributes
JSRuntime *	_runtime
JSObject *	_globalObject
BOOL	_showErrorLocations
JSClass *	_objectClass
JSClass *	_stringClass
JSClass *	_arrayClass
JSClass *	_numberClass
JSClass *	_booleanClass
BOOL	_dumpStackForErrors
BOOL	_dumpStackForWarnings

Detailed Description

Definition at line 42 of file OOJavaScriptEngine.h.

Method Documentation

arrayClass

- (JSClass *) arrayClass

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _arrayClass;
}

References nil.

booleanClass

- (JSClass *) booleanClass

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _booleanClass;
}

callJSFunction:forObject:argc:argv:result:

- (BOOL) callJSFunction:		(jsval)	function
forObject:		(JSObject *)	jsThis
argc:		(uintN)	argc
argv:		(jsval *)	argv
result:		(jsval *)	outResult

Definition at line 2531 of file OOJavaScriptEngine.m.

                       :(jsval)function
              forObject:(JSObject *)jsThis
                   argc:(uintN)argc
                   argv:(jsval *)argv
                 result:(jsval *)outResult
{
    JSContext                   *context = NULL;
    BOOL                        result;
    
    NSParameterAssert(OOJSValueIsFunction(context, function));
    
    context = OOJSAcquireContext();
    
    OOJSStartTimeLimiter();
    result = JS_CallFunctionValue(context, jsThis, function, argc, argv, outResult);
    OOJSStopTimeLimiter();
    
    JS_ReportPendingException(context);
    OOJSRelinquishContext(context);
    
    return result;
}

Referenced by MissionRunCallback().

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createMainThreadContext

- (void) createMainThreadContext

implementation

Provided by category OOJavaScriptEngine(Private).

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    NSAssert(gOOJSMainThreadContext == NULL, @"-[OOJavaScriptEngine createMainThreadContext] called while the main thread context exists.");
    
    // create a context and associate it with the JS runtime.
    gOOJSMainThreadContext = JS_NewContext(_runtime, OOJS_STACK_SIZE);
    
    // if context creation failed, end the program here.
    if (gOOJSMainThreadContext == NULL)
    {
        OOLog(@"script.javaScript.init.error", @"%@", @"***** FATAL ERROR: failed to create JavaScript context.");
        exit(1);
    }
    
    JS_BeginRequest(gOOJSMainThreadContext);
    
    JS_SetOptions(gOOJSMainThreadContext, OOJSENGINE_CONTEXT_OPTIONS);
    JS_SetVersion(gOOJSMainThreadContext, OOJSENGINE_JSVERSION);
    
#if JS_GC_ZEAL
    uint8_t gcZeal = [[NSUserDefaults standardUserDefaults]  oo_unsignedCharForKey:@"js-gc-zeal"];
    if (gcZeal > 0)
    {
        // Useful js-gc-zeal values are 0 (off), 1 and 2.
        OOLog(@"script.javaScript.debug.gcZeal", @"Setting JavaScript garbage collector zeal to %u.", gcZeal);
        JS_SetGCZeal(gOOJSMainThreadContext, gcZeal);
    }
#endif
    
    JS_SetErrorReporter(gOOJSMainThreadContext, ReportJSError);
    
    // Create the global object.
    CreateOOJSGlobal(gOOJSMainThreadContext, &_globalObject);
    
    // Initialize the built-in JS objects and the global object.
    JS_InitStandardClasses(gOOJSMainThreadContext, _globalObject);
    if (![self lookUpStandardClassPointers])
    {
        OOLog(@"script.javaScript.init.error", @"%@", @"***** FATAL ERROR: failed to look up standard JavaScript classes.");
        exit(1);
    }
    [self registerStandardObjectConverters];
    
    SetUpOOJSGlobal(gOOJSMainThreadContext, _globalObject);
    OOConstToJSStringInit(gOOJSMainThreadContext);
    
    // Initialize Oolite classes.
    InitOOJSMissionVariables(gOOJSMainThreadContext, _globalObject);
    InitOOJSMission(gOOJSMainThreadContext, _globalObject);
    InitOOJSOolite(gOOJSMainThreadContext, _globalObject);
    InitOOJSVector(gOOJSMainThreadContext, _globalObject);
    InitOOJSQuaternion(gOOJSMainThreadContext, _globalObject);
    InitOOJSSystem(gOOJSMainThreadContext, _globalObject);
    InitOOJSEntity(gOOJSMainThreadContext, _globalObject);
    InitOOJSShip(gOOJSMainThreadContext, _globalObject);
    InitOOJSStation(gOOJSMainThreadContext, _globalObject);
    InitOOJSDock(gOOJSMainThreadContext, _globalObject);
    InitOOJSVisualEffect(gOOJSMainThreadContext, _globalObject);
    InitOOJSExhaustPlume(gOOJSMainThreadContext, _globalObject);
    InitOOJSFlasher(gOOJSMainThreadContext, _globalObject);
    InitOOJSWormhole(gOOJSMainThreadContext, _globalObject);
    InitOOJSWaypoint(gOOJSMainThreadContext, _globalObject);
    InitOOJSPlayer(gOOJSMainThreadContext, _globalObject);
    InitOOJSPlayerShip(gOOJSMainThreadContext, _globalObject);
    InitOOJSManifest(gOOJSMainThreadContext, _globalObject);
    InitOOJSSun(gOOJSMainThreadContext, _globalObject);
    InitOOJSPlanet(gOOJSMainThreadContext, _globalObject);
    InitOOJSScript(gOOJSMainThreadContext, _globalObject);
    InitOOJSTimer(gOOJSMainThreadContext, _globalObject);
    InitOOJSClock(gOOJSMainThreadContext, _globalObject);
    InitOOJSWorldScripts(gOOJSMainThreadContext, _globalObject);
    InitOOJSSound(gOOJSMainThreadContext, _globalObject);
    InitOOJSSoundSource(gOOJSMainThreadContext, _globalObject);
    InitOOJSSpecialFunctions(gOOJSMainThreadContext, _globalObject);
    InitOOJSSystemInfo(gOOJSMainThreadContext, _globalObject);
    InitOOJSEquipmentInfo(gOOJSMainThreadContext, _globalObject);
    InitOOJSShipGroup(gOOJSMainThreadContext, _globalObject);
    InitOOJSFrameCallbacks(gOOJSMainThreadContext, _globalObject);
    InitOOJSFont(gOOJSMainThreadContext, _globalObject);
    
    // Run prefix scripts.
    [OOJSScript jsScriptFromFileNamed:@"oolite-global-prefix.js"
                           properties:[NSDictionary dictionaryWithObject:JSSpecialFunctionsObjectWrapper(gOOJSMainThreadContext)
                                                                  forKey:@"special"]];
    
    JS_EndRequest(gOOJSMainThreadContext);
    
    OOLog(@"script.javaScript.init.success", @"%@", @"Set up JavaScript context.");
}

dealloc

- (void) dealloc

implementation

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    sSharedEngine = nil;
    
    OOJSFrameCallbacksRemoveAll();
    
    [self destroyMainThreadContext];
    JS_DestroyRuntime(_runtime);
    
    [super dealloc];
}

DebuggerHook

+ (static JSTrapStatus) DebuggerHook (JSContext *) context (JSScript *) script (jsbytecode *) pc (jsval *) rval (void *) closure

implementation

Definition at line 622 of file OOJavaScriptEngine.m.

{
    OOJSPauseTimeLimiter();
    
    OOLog(@"script.javaScript.debugger", @"debugger invoked during %@:", [[OOJSScript currentlyRunningScript] displayName]);
    OOJSDumpStack(context);
    
    OOJSResumeTimeLimiter();
    
    return JSTRAP_CONTINUE;
}

destroyMainThreadContext

- (void) destroyMainThreadContext

implementation

Provided by category OOJavaScriptEngine(Private).

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    if (gOOJSMainThreadContext != NULL)
    {
        JSContext *context = OOJSAcquireContext();
        JS_ClearScope(gOOJSMainThreadContext, _globalObject);
        
        _globalObject = NULL;
        _objectClass = NULL;
        _stringClass = NULL;
        _arrayClass = NULL;
        _numberClass = NULL;
        _booleanClass = NULL;
        
        UnregisterObjectConverters();
        UnregisterSubclasses();
        OOConstToJSStringDestroy();
        
        OOJSRelinquishContext(context);
        
        _globalObject = NULL;
        JS_DestroyContext(gOOJSMainThreadContext);  // Forces unconditional GC.
        gOOJSMainThreadContext = NULL;
    }
}

dumpStackForErrors

- (BOOL) dumpStackForErrors

Definition at line 622 of file OOJavaScriptEngine.m.

{
    return _dumpStackForErrors;
}

Referenced by ReportJSError().

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dumpStackForWarnings

- (BOOL) dumpStackForWarnings

Definition at line 622 of file OOJavaScriptEngine.m.

{
    return _dumpStackForWarnings;
}

Referenced by ReportJSError().

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enableDebuggerStatement

- (void) enableDebuggerStatement

Definition at line 622 of file OOJavaScriptEngine.m.

{
    JS_SetDebuggerHandler(_runtime, DebuggerHook, self);
}

Referenced by NSObject(OODebugPlugInController)::setUpDebugger.

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garbageCollectionOpportunity:

- (void) garbageCollectionOpportunity:

(BOOL)

force

Definition at line 2531 of file OOJavaScriptEngine.m.

                                     :(BOOL)force
{
    JSContext *context = OOJSAcquireContext();
    if (force)
    {
        JS_GC(context);
    }
    else
    {
        JS_MaybeGC(context);
    }
    OOJSRelinquishContext(context);
}

globalObject

- (JSObject *) globalObject

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _globalObject;
}

Referenced by OOStringFromDeciCredits().

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init

- (id) init

implementation

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    NSAssert(sSharedEngine == nil, @"Attempt to create multiple OOJavaScriptEngines.");
    
    if (!(self = [super init]))  return nil;
    sSharedEngine = self;
    
    JS_SetCStringsAreUTF8();
    
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
#ifndef NDEBUG
    /*  Set stack trace preferences from preferences. These will be overriden
        by the debug OXP script if installed, but being able to enable traces
        without setting up the debug console could be useful for debugging
        users' problems.
    */
    [self setDumpStackForErrors:[defaults boolForKey:@"dump-stack-for-errors"]];
    [self setDumpStackForWarnings:[defaults boolForKey:@"dump-stack-for-warnings"]];
#endif
    
    assert(sizeof(jschar) == sizeof(unichar));
    
    // initialize the JS run time, and return result in runtime.
    uint32_t jsRuntimeInMiB = [defaults oo_intForKey:@"jsruntime-size-mib" defaultValue:OOJS_RUNTIME_SIZE_MiB];
    _runtime = JS_NewRuntime(jsRuntimeInMiB * 1024L * 1024L);
    
    // if runtime creation failed, end the program here.
    if (_runtime == NULL)
    {
        OOLog(@"script.javaScript.init.error", @"***** FATAL ERROR: failed to create JavaScript runtime with size %uMiB.", jsRuntimeInMiB);
        exit(1);
    }
    
    // OOJSTimeManagementInit() must be called before any context is created!
    OOJSTimeManagementInit(self, _runtime);
    
    [self createMainThreadContext];
    
    return self;
}

lookUpStandardClassPointers

- (BOOL) lookUpStandardClassPointers

implementation

Provided by category OOJavaScriptEngine(Private).

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    JSObject                *templateObject = NULL;
    
    templateObject = JS_NewObject(gOOJSMainThreadContext, NULL, NULL, NULL);
    if (EXPECT_NOT(templateObject == NULL))  return NO;
    _objectClass = OOJSGetClass(gOOJSMainThreadContext, templateObject);
    
    if (EXPECT_NOT(!JS_ValueToObject(gOOJSMainThreadContext, JS_GetEmptyStringValue(gOOJSMainThreadContext), &templateObject)))  return NO;
    _stringClass = OOJSGetClass(gOOJSMainThreadContext, templateObject);
    
    templateObject = JS_NewArrayObject(gOOJSMainThreadContext, 0, NULL);
    if (EXPECT_NOT(templateObject == NULL))  return NO;
    _arrayClass = OOJSGetClass(gOOJSMainThreadContext, templateObject);
    
    if (EXPECT_NOT(!JS_ValueToObject(gOOJSMainThreadContext, INT_TO_JSVAL(0), &templateObject)))  return NO;
    _numberClass = OOJSGetClass(gOOJSMainThreadContext, templateObject);
    
    if (EXPECT_NOT(!JS_ValueToObject(gOOJSMainThreadContext, JSVAL_FALSE, &templateObject)))  return NO;
    _booleanClass = OOJSGetClass(gOOJSMainThreadContext, templateObject);
    
    return YES;
}

numberClass

- (JSClass *) numberClass

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _numberClass;
}

objectClass

- (JSClass *) objectClass

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _objectClass;
}

registerStandardObjectConverters

- (void) registerStandardObjectConverters

implementation

Provided by category OOJavaScriptEngine(Private).

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    OOJSRegisterObjectConverter([self objectClass], (OOJSClassConverterCallback)OOJSDictionaryFromJSObject);
    OOJSRegisterObjectConverter([self stringClass], JSStringConverter);
    OOJSRegisterObjectConverter([self arrayClass], JSArrayConverter);
    OOJSRegisterObjectConverter([self numberClass], JSNumberConverter);
    OOJSRegisterObjectConverter([self booleanClass], JSBooleanConverter);
}

removeGCObjectRoot:

- (void) removeGCObjectRoot:

(JSObject **)

rootPtr

Definition at line 2531 of file OOJavaScriptEngine.m.

                           :(JSObject **)rootPtr
{
    JSContext *context = OOJSAcquireContext();
    JS_RemoveObjectRoot(context, rootPtr);
    OOJSRelinquishContext(context);
}

removeGCValueRoot:

- (void) removeGCValueRoot:

(jsval *)

rootPtr

Definition at line 2531 of file OOJavaScriptEngine.m.

                          :(jsval *)rootPtr
{
    JSContext *context = OOJSAcquireContext();
    JS_RemoveValueRoot(context, rootPtr);
    OOJSRelinquishContext(context);
}

reset

- (BOOL) reset

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    NSAssert(gOOJSMainThreadContext != NULL, @"JavaScript engine not active. Can't reset.");
    
    OOJSFrameCallbacksRemoveAll();
    
# if 0
    // deferred JS reset - test harness.
    static int counter = 3;     // loading a savegame with different strict mode calls js reset twice
    if (counter-- == 0) {
    counter = 3;
    OOLog(@"script.javascript.init.error", @"%@", @"JavaScript processes still pending. Can't reset JavaScript engine.");
        return NO;
    }
    else
    {
        OOLog(@"script.javascript.init", @"%@", @"JavaScript reset successful.");
    }
#endif
        
#if JS_THREADSAFE
    //NSAssert(!JS_IsInRequest(gOOJSMainThreadContext), @"JavaScript processes still pending. Can't reset JavaScript engine.");
    
    if (JS_IsInRequest(gOOJSMainThreadContext))
    {
        // some threads are still pending, this should mean timers are still being removed.
        OOLog(@"script.javascript.init.error", @"%@", @"JavaScript processes still pending. Can't reset JavaScript engine.");
        return NO;
    }
    else
    {
        OOLog(@"script.javascript.init", @"%@", @"JavaScript reset successful.");
    }
#endif
    
    JSContext *context = OOJSAcquireContext();
    [[NSNotificationCenter defaultCenter] postNotificationName:kOOJavaScriptEngineWillResetNotification object:self];
    OOJSRelinquishContext(context);
    
    [self destroyMainThreadContext];
    [self createMainThreadContext];
    
    context = OOJSAcquireContext();
    [[NSNotificationCenter defaultCenter] postNotificationName:kOOJavaScriptEngineDidResetNotification object:self];
    OOJSRelinquishContext(context);
    
    [self garbageCollectionOpportunity:YES];
    return YES;
}

runMissionCallback

- (void) runMissionCallback

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    MissionRunCallback();
}

sendMonitorError:withMessage:inContext:

- (void) sendMonitorError: (JSErrorReport *) errorReport withMessage: (NSString *) message inContext: (JSContext *) context

implementation

Provided by category OOJavaScriptEngine(OOMonitorSupportInternal).

Definition at line 622 of file OOJavaScriptEngine.m.

                         :(JSErrorReport *)errorReport
              withMessage:(NSString *)message
                inContext:(JSContext *)theContext
{
    if ([_monitor respondsToSelector:@selector(jsEngine:context:error:stackSkip:showingLocation:withMessage:)])
    {
        [_monitor jsEngine:self context:theContext error:errorReport stackSkip:sErrorHandlerStackSkip showingLocation:[self showErrorLocations] withMessage:message];
    }
}

Referenced by ReportJSError().

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sendMonitorLogMessage:withMessageClass:inContext: [1/2]

- (void) sendMonitorLogMessage: (NSString *) message withMessageClass: (NSString *) messageClass inContext: (JSContext *) context

implementation

Provided by category OOJavaScriptEngine(OOMonitorSupportInternal).

Definition at line 622 of file OOJavaScriptEngine.m.

                              :(NSString *)message
              withMessageClass:(NSString *)messageClass
                     inContext:(JSContext *)theContext
{
    if ([_monitor respondsToSelector:@selector(jsEngine:context:logMessage:ofClass:)])
    {
        [_monitor jsEngine:self context:theContext logMessage:message ofClass:messageClass];
    }
}

Referenced by GlobalLog().

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sendMonitorLogMessage:withMessageClass:inContext: [2/2]

- (void) sendMonitorLogMessage: (NSString *) message withMessageClass: (NSString *) messageClass inContext: (JSContext *) context

implementation

Provided by category OOJavaScriptEngine(OOMonitorSupportInternal).

setDumpStackForErrors:

- (void) setDumpStackForErrors:

(BOOL)

value

Definition at line 622 of file OOJavaScriptEngine.m.

                              :(BOOL)value
{
    _dumpStackForErrors = !!value;
}

Referenced by ConsoleSetProperty().

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setDumpStackForWarnings:

- (void) setDumpStackForWarnings:

(BOOL)

value

Definition at line 622 of file OOJavaScriptEngine.m.

                                :(BOOL)value
{
    _dumpStackForWarnings = !!value;
}

Referenced by ConsoleSetProperty().

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setMonitor:

- (void) setMonitor: (id<OOJavaScriptEngineMonitor>) inMonitor

implementation

Provided by category OOJavaScriptEngine(OOMonitorSupport).

Definition at line 622 of file OOJavaScriptEngine.m.

                   :(id<OOJavaScriptEngineMonitor>)inMonitor
{
    [_monitor autorelease];
    _monitor = [inMonitor retain];
}

setShowErrorLocations:

- (void) setShowErrorLocations:

(BOOL)

value

Definition at line 2531 of file OOJavaScriptEngine.m.

                              :(BOOL)value
{
    _showErrorLocations = !!value;
}

Referenced by ConsoleSetProperty().

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sharedEngine

+ (OOJavaScriptEngine *) sharedEngine

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    if (sSharedEngine == nil)  sSharedEngine = [[self alloc] init];
    
    return sSharedEngine;
}

Referenced by OOJSGuiScreenKeyDefinition::callback, OOJSInterfaceDefinition::callback, OOJSPopulatorDefinition::callback, ConsoleSetProperty(), OOJSFunction::dealloc, DebugMonitorToJSConsole(), DescribeValue(), GlobalLog(), MissionRunCallback(), OOStringFromDeciCredits(), ReportJSError(), and NSObject(OODebugPlugInController)::setUpDebugger.

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showErrorLocations

- (BOOL) showErrorLocations

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _showErrorLocations;
}

Referenced by ReportJSError().

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stringClass

- (JSClass *) stringClass

Definition at line 2531 of file OOJavaScriptEngine.m.

{
    return _stringClass;
}

watchdogTimerThread

- (void) watchdogTimerThread

implementation

Provided by category OOJavaScriptEngine(WatchdogTimer).

Definition at line 591 of file OOJSEngineTimeManagement.m.

{
    for (;;)
    {
#if OOLITE_WINDOWS
        Sleep(OOJS_TIME_LIMIT * 1000);
#else
        usleep(OOJS_TIME_LIMIT * 1000000);
#endif
        
        if (EXPECT(sLimiterStartDepth == 0 || sLimiterPauseDepth > 0))  continue;   // Most of the time, a script isn't running.
        
        // Note: if you add logging here, you need a manual autorelease pool.
        
        OOHighResTimeValue now = OOGetHighResTime();
        OOTimeDelta elapsed = OOHighResTimeDeltaInSeconds(sLimiterStart, now);
        OODisposeHighResTime(now);
        
        if (EXPECT_NOT(elapsed > sLimiterTimeLimit))
        {
            sStop = YES;
            JS_TriggerAllOperationCallbacks(_runtime);
        }
    }
}

Member Data Documentation

_arrayClass

- (JSClass*) _arrayClass

private

Definition at line 51 of file OOJavaScriptEngine.h.

_booleanClass

- (JSClass*) _booleanClass

private

Definition at line 53 of file OOJavaScriptEngine.h.

_dumpStackForErrors

- (BOOL) _dumpStackForErrors

private

Definition at line 56 of file OOJavaScriptEngine.h.

_dumpStackForWarnings

- (BOOL) _dumpStackForWarnings

private

Definition at line 57 of file OOJavaScriptEngine.h.

_globalObject

- (JSObject*) _globalObject

private

Definition at line 46 of file OOJavaScriptEngine.h.

_numberClass

- (JSClass*) _numberClass

private

Definition at line 52 of file OOJavaScriptEngine.h.

_objectClass

- (JSClass*) _objectClass

private

Definition at line 49 of file OOJavaScriptEngine.h.

_runtime

- (JSRuntime*) _runtime

private

Definition at line 45 of file OOJavaScriptEngine.h.

_showErrorLocations

- (BOOL) _showErrorLocations

private

Definition at line 47 of file OOJavaScriptEngine.h.

_stringClass

- (JSClass*) _stringClass

private

Definition at line 50 of file OOJavaScriptEngine.h.

---

The documentation for this class was generated from the following files:

• src/Core/Scripting/OOJavaScriptEngine.h
• src/Core/Scripting/OOJavaScriptEngine.m