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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* 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 APPLE INC. AND ITS CONTRIBUTORS ``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 APPLE INC. OR ITS 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.
*/
#include "config.h"
#include "JSWebExtensionWrapper.h"
#if ENABLE(WK_WEB_EXTENSIONS)
#include "JSWebExtensionWrappable.h"
#include "WebFrame.h"
#include "WebPage.h"
#include <JavaScriptCore/JSObjectRef.h>
#include <JavaScriptCore/JSWeakObjectMapRefPrivate.h>
namespace WebKit {
static HashMap<JSGlobalContextRef, JSWeakObjectMapRef>& wrapperCache()
{
static NeverDestroyed<HashMap<JSGlobalContextRef, JSWeakObjectMapRef>> wrappers;
return wrappers;
}
static void cacheMapDestroyed(JSWeakObjectMapRef map, void* context)
{
wrapperCache().remove(static_cast<JSGlobalContextRef>(context));
}
static inline JSWeakObjectMapRef wrapperCacheMap(JSContextRef context)
{
auto globalContext = JSContextGetGlobalContext(context);
return wrapperCache().ensure(globalContext, [&] {
return JSWeakObjectMapCreate(globalContext, globalContext, cacheMapDestroyed);
}).iterator->value;
}
static inline JSValueRef getCachedWrapper(JSContextRef context, JSWeakObjectMapRef wrappers, JSWebExtensionWrappable* object)
{
ASSERT(context);
ASSERT(wrappers);
ASSERT(object);
if (auto wrapper = JSWeakObjectMapGet(context, wrappers, object)) {
// Check if the wrapper is still valid. Objects invalidated through finalize
// will not get removed from the map automatically.
if (JSObjectGetPrivate(wrapper))
return wrapper;
// Remove from the map, since the object is invalid.
JSWeakObjectMapRemove(context, wrappers, object);
}
return nullptr;
}
JSValueRef JSWebExtensionWrapper::wrap(JSContextRef context, JSWebExtensionWrappable* object)
{
ASSERT(context);
if (!object)
return JSValueMakeNull(context);
auto wrappers = wrapperCacheMap(context);
if (auto result = getCachedWrapper(context, wrappers, object))
return result;
auto objectClass = object->wrapperClass();
ASSERT(objectClass);
auto wrapper = JSObjectMake(context, objectClass, object);
ASSERT(wrapper);
JSWeakObjectMapSet(context, wrappers, object, wrapper);
return wrapper;
}
JSWebExtensionWrappable* JSWebExtensionWrapper::unwrap(JSContextRef context, JSValueRef value)
{
ASSERT(context);
ASSERT(value);
if (!context || !value)
return nullptr;
return static_cast<JSWebExtensionWrappable*>(JSObjectGetPrivate(JSValueToObject(context, value, nullptr)));
}
static JSWebExtensionWrappable* unwrapObject(JSObjectRef object)
{
ASSERT(object);
auto* wrappable = static_cast<JSWebExtensionWrappable*>(JSObjectGetPrivate(object));
ASSERT(wrappable);
return wrappable;
}
void JSWebExtensionWrapper::initialize(JSContextRef, JSObjectRef object)
{
if (auto* wrappable = unwrapObject(object))
wrappable->ref();
}
void JSWebExtensionWrapper::finalize(JSObjectRef object)
{
if (auto* wrappable = unwrapObject(object)) {
JSObjectSetPrivate(object, nullptr);
wrappable->deref();
}
}
RefPtr<WebFrame> toWebFrame(JSContextRef context)
{
ASSERT(context);
return WebFrame::frameForContext(JSContextGetGlobalContext(context));
}
RefPtr<WebPage> toWebPage(JSContextRef context)
{
ASSERT(context);
auto frame = toWebFrame(context);
return frame ? frame->page() : nullptr;
}
} // namespace WebKit
#endif // ENABLE(WK_WEB_EXTENSIONS)
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