/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 * Copyright (C) 2006 James G. Speth (speth@end.com)

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

*/

#import "ObjCPlugin.h"

#import <objc/objc-runtime.h>

#import <WebKit/WebKit.h>

// === NSObject category to expose almost everything to JavaScript ===

// Warning: this class introduces huge security weaknesses, and should only be used

// for testing inside of DumpRenderTree, and only with trusted code.  By default, it has

// the same restrictive behavior as the standard WebKit setup.  However, scripts can use the

// plugin's removeBridgeRestrictions: method to open up almost total access to the Cocoa

// frameworks.

static BOOL _allowsScriptsFullAccess = NO;

@interface NSObject (ObjCScriptAccess)

+ (void)setAllowsScriptsFullAccess:(BOOL)value;

+ (BOOL)allowsScriptsFullAccess;

@end

@implementation NSObject (ObjCScriptAccess)

+ (void)setAllowsScriptsFullAccess:(BOOL)value

{

    _allowsScriptsFullAccess = value;

}

+ (BOOL)allowsScriptsFullAccess

{

    return _allowsScriptsFullAccess;

}

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector

{

    return !_allowsScriptsFullAccess;

}

+ (NSString *)webScriptNameForSelector:(SEL)selector

{

    return nil;

}

@end

@interface JSObjC : NSObject {

}

// expose some useful objc functions to the scripting environment

- (id)lookUpClass:(NSString *)name;

- (void)log:(NSString *)message;

- (id)retainObject:(id)obj;

- (id)classOfObject:(id)obj;

- (NSString *)classNameOfObject:(id)obj;

@end

@implementation JSObjC

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector

{

    return NO;

}

+ (NSString *)webScriptNameForSelector:(SEL)selector

{

    return nil;

}

- (id)invokeDefaultMethodWithArguments:(NSArray *)args

{

    // this is a useful shortcut for accessing objective-c classes from the scripting

    // environment, e.g. 'var myObject = objc("NSObject").alloc().init();'

    if ([args count] == 1)

        return [self lookUpClass:[args objectAtIndex:0]];

    return nil;

}

- (id)lookUpClass:(NSString *)name

{

    return NSClassFromString(name);

}

- (void)log:(NSString *)message

{

    NSLog(message);

}

- (id)retainObject:(id)obj

{

    return [obj retain];

}

- (id)classOfObject:(id)obj

{

    return (id)[obj class];

}

- (NSString *)classNameOfObject:(id)obj

{

    return [obj className];

}

@end

@implementation ObjCPlugin

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector

{

    if (aSelector == @selector(removeBridgeRestrictions:))

        return NO;

    if (aSelector == @selector(echo:))

        return NO;

    if (aSelector == @selector(throwIfArgumentIsNotHello:))

      return NO;

    return YES;

}

+ (NSString *)webScriptNameForSelector:(SEL)aSelector

{

    if (aSelector == @selector(echo:))

        return @"echo";

    if (aSelector == @selector(throwIfArgumentIsNotHello:))

      return @"throwIfArgumentIsNotHello";

    return nil;

}

+ (NSString *)webScriptNameForKey:(const char *)key 

{

    if (strcmp(key, "throwOnDealloc") == 0)

      return @"throwOnDealloc";

    return nil;

}

+ (BOOL)isKeyExcludedFromWebScript:(const char *)key 

{

    if (strcmp(key, "throwOnDealloc") == 0)

      return NO;

    return YES;

}

- (void)removeBridgeRestrictions:(id)container

{

    // let scripts invoke any selector

    [NSObject setAllowsScriptsFullAccess:YES];

    // store a JSObjC instance into the provided container

    JSObjC *objc = [[JSObjC alloc] init];

    [container setValue:objc forKey:@"objc"];

    [objc release];

}

- (id)echo:(id)obj

{

    return obj;

}

- (void)throwIfArgumentIsNotHello:(NSString *)str 

{

    if (![str isEqualToString:@"Hello"]) 

        [WebScriptObject throwException:[NSString stringWithFormat:@"%@ != Hello", str]];

}

- (void)dealloc

{

    if (throwOnDealloc)

        [WebScriptObject throwException:@"Throwing exception on dealloc of ObjCPlugin"];

    [super dealloc];

}

@end