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/*
* Copyright (C) 2006, 2007 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 COMPUTER, INC. ``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 COMPUTER, INC. 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.
*/
#include "config.h"
#include "WebKitDLL.h"
#include "WebNotificationCenter.h"
#include "WebNotification.h"
#include <WebCore/COMPtr.h>
#include <WebCore/PlatformString.h>
#include <wtf/HashMap.h>
#include <wtf/HashTraits.h>
#include <wtf/Vector.h>
#include <wtf/text/StringHash.h>
#include <utility>
#include <wchar.h>
using namespace WebCore;
typedef std::pair<COMPtr<IUnknown>, COMPtr<IWebNotificationObserver> > ObjectObserverPair;
typedef Vector<ObjectObserverPair> ObjectObserverList;
typedef ObjectObserverList::iterator ObserverListIterator;
typedef HashMap<String, ObjectObserverList> MappedObservers;
struct WebNotificationCenterPrivate {
MappedObservers m_mappedObservers;
};
// WebNotificationCenter ----------------------------------------------------------------
IWebNotificationCenter* WebNotificationCenter::m_defaultCenter = 0;
WebNotificationCenter::WebNotificationCenter()
: m_refCount(0)
, d(new WebNotificationCenterPrivate)
{
gClassCount++;
gClassNameCount.add("WebNotificationCenter");
}
WebNotificationCenter::~WebNotificationCenter()
{
gClassCount--;
gClassNameCount.remove("WebNotificationCenter");
}
WebNotificationCenter* WebNotificationCenter::createInstance()
{
WebNotificationCenter* instance = new WebNotificationCenter();
instance->AddRef();
return instance;
}
// IUnknown -------------------------------------------------------------------
HRESULT STDMETHODCALLTYPE WebNotificationCenter::QueryInterface(REFIID riid, void** ppvObject)
{
*ppvObject = 0;
if (IsEqualGUID(riid, IID_IUnknown))
*ppvObject = static_cast<IWebNotificationCenter*>(this);
else if (IsEqualGUID(riid, IID_IWebNotificationCenter))
*ppvObject = static_cast<IWebNotificationCenter*>(this);
else
return E_NOINTERFACE;
AddRef();
return S_OK;
}
ULONG STDMETHODCALLTYPE WebNotificationCenter::AddRef(void)
{
return ++m_refCount;
}
ULONG STDMETHODCALLTYPE WebNotificationCenter::Release(void)
{
ULONG newRef = --m_refCount;
if (!newRef)
delete(this);
return newRef;
}
IWebNotificationCenter* WebNotificationCenter::defaultCenterInternal()
{
if (!m_defaultCenter)
m_defaultCenter = WebNotificationCenter::createInstance();
return m_defaultCenter;
}
void WebNotificationCenter::postNotificationInternal(IWebNotification* notification, BSTR notificationName, IUnknown* anObject)
{
String name(notificationName, SysStringLen(notificationName));
MappedObservers::iterator it = d->m_mappedObservers.find(name);
if (it == d->m_mappedObservers.end())
return;
// Intentionally make a copy of the list to avoid the possibility of errors
// from a mutation of the list in the onNotify callback.
ObjectObserverList list = it->second;
ObserverListIterator end = list.end();
for (ObserverListIterator it2 = list.begin(); it2 != end; ++it2) {
IUnknown* observedObject = it2->first.get();
IWebNotificationObserver* observer = it2->second.get();
if (!observedObject || !anObject || observedObject == anObject)
observer->onNotify(notification);
}
}
// IWebNotificationCenter -----------------------------------------------------
HRESULT STDMETHODCALLTYPE WebNotificationCenter::defaultCenter(
/* [retval][out] */ IWebNotificationCenter** center)
{
*center = defaultCenterInternal();
(*center)->AddRef();
return S_OK;
}
HRESULT STDMETHODCALLTYPE WebNotificationCenter::addObserver(
/* [in] */ IWebNotificationObserver* observer,
/* [in] */ BSTR notificationName,
/* [in] */ IUnknown* anObject)
{
String name(notificationName, SysStringLen(notificationName));
MappedObservers::iterator it = d->m_mappedObservers.find(name);
if (it != d->m_mappedObservers.end())
it->second.append(ObjectObserverPair(anObject, observer));
else {
ObjectObserverList list;
list.append(ObjectObserverPair(anObject, observer));
d->m_mappedObservers.add(name, list);
}
return S_OK;
}
HRESULT STDMETHODCALLTYPE WebNotificationCenter::postNotification(
/* [in] */ IWebNotification* notification)
{
BSTR name;
HRESULT hr = notification->name(&name);
if (FAILED(hr))
return hr;
COMPtr<IUnknown> obj;
hr = notification->getObject(&obj);
if (FAILED(hr))
return hr;
postNotificationInternal(notification, name, obj.get());
SysFreeString(name);
return hr;
}
HRESULT STDMETHODCALLTYPE WebNotificationCenter::postNotificationName(
/* [in] */ BSTR notificationName,
/* [in] */ IUnknown* anObject,
/* [optional][in] */ IPropertyBag* userInfo)
{
COMPtr<WebNotification> notification(AdoptCOM, WebNotification::createInstance(notificationName, anObject, userInfo));
postNotificationInternal(notification.get(), notificationName, anObject);
return S_OK;
}
HRESULT STDMETHODCALLTYPE WebNotificationCenter::removeObserver(
/* [in] */ IWebNotificationObserver* anObserver,
/* [in] */ BSTR notificationName,
/* [optional][in] */ IUnknown* anObject)
{
String name(notificationName, SysStringLen(notificationName));
MappedObservers::iterator it = d->m_mappedObservers.find(name);
if (it == d->m_mappedObservers.end())
return E_FAIL;
ObjectObserverList& observerList = it->second;
ObserverListIterator end = observerList.end();
int i = 0;
for (ObserverListIterator it2 = observerList.begin(); it2 != end; ++it2, ++i) {
IUnknown* observedObject = it2->first.get();
IWebNotificationObserver* observer = it2->second.get();
if (observer == anObserver && (!anObject || anObject == observedObject)) {
observerList.remove(i);
break;
}
}
if (observerList.isEmpty())
d->m_mappedObservers.remove(name);
return S_OK;
}
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