mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
141 lines
3.3 KiB
C++
141 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsObserverList.h"
|
|
|
|
#include "nsAutoPtr.h"
|
|
#include "nsCOMArray.h"
|
|
#include "nsISimpleEnumerator.h"
|
|
#include "xpcpublic.h"
|
|
|
|
nsresult
|
|
nsObserverList::AddObserver(nsIObserver* anObserver, bool ownsWeak)
|
|
{
|
|
NS_ASSERTION(anObserver, "Null input");
|
|
|
|
if (!ownsWeak) {
|
|
ObserverRef* o = mObservers.AppendElement(anObserver);
|
|
if (!o) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIWeakReference> weak = do_GetWeakReference(anObserver);
|
|
if (!weak) {
|
|
return NS_NOINTERFACE;
|
|
}
|
|
|
|
ObserverRef* o = mObservers.AppendElement(weak);
|
|
if (!o) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsObserverList::RemoveObserver(nsIObserver* anObserver)
|
|
{
|
|
NS_ASSERTION(anObserver, "Null input");
|
|
|
|
if (mObservers.RemoveElement(static_cast<nsISupports*>(anObserver))) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIWeakReference> observerRef = do_GetWeakReference(anObserver);
|
|
if (!observerRef) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!mObservers.RemoveElement(observerRef)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsObserverList::GetObserverList(nsISimpleEnumerator** anEnumerator)
|
|
{
|
|
nsRefPtr<nsObserverEnumerator> e(new nsObserverEnumerator(this));
|
|
e.forget(anEnumerator);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsObserverList::FillObserverArray(nsCOMArray<nsIObserver>& aArray)
|
|
{
|
|
aArray.SetCapacity(mObservers.Length());
|
|
|
|
nsTArray<ObserverRef> observers(mObservers);
|
|
|
|
for (int32_t i = observers.Length() - 1; i >= 0; --i) {
|
|
if (observers[i].isWeakRef) {
|
|
nsCOMPtr<nsIObserver> o(do_QueryReferent(observers[i].asWeak()));
|
|
if (o) {
|
|
aArray.AppendObject(o);
|
|
} else {
|
|
// the object has gone away, remove the weakref
|
|
mObservers.RemoveElement(observers[i].asWeak());
|
|
}
|
|
} else {
|
|
aArray.AppendObject(observers[i].asObserver());
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsObserverList::NotifyObservers(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* someData)
|
|
{
|
|
nsCOMArray<nsIObserver> observers;
|
|
FillObserverArray(observers);
|
|
|
|
for (int32_t i = 0; i < observers.Count(); ++i) {
|
|
observers[i]->Observe(aSubject, aTopic, someData);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsObserverList::UnmarkGrayStrongObservers()
|
|
{
|
|
for (uint32_t i = 0; i < mObservers.Length(); ++i) {
|
|
if (!mObservers[i].isWeakRef) {
|
|
xpc_TryUnmarkWrappedGrayObject(mObservers[i].asObserver());
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsObserverEnumerator, nsISimpleEnumerator)
|
|
|
|
nsObserverEnumerator::nsObserverEnumerator(nsObserverList* aObserverList)
|
|
: mIndex(0)
|
|
{
|
|
aObserverList->FillObserverArray(mObservers);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsObserverEnumerator::HasMoreElements(bool* aResult)
|
|
{
|
|
*aResult = (mIndex < mObservers.Count());
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsObserverEnumerator::GetNext(nsISupports** aResult)
|
|
{
|
|
if (mIndex == mObservers.Count()) {
|
|
NS_ERROR("Enumerating after HasMoreElements returned false.");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
NS_ADDREF(*aResult = mObservers[mIndex]);
|
|
++mIndex;
|
|
return NS_OK;
|
|
}
|