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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /dom/permission/PermissionObserver.cpp | |
parent | Initial commit. (diff) | |
download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/permission/PermissionObserver.cpp')
-rw-r--r-- | dom/permission/PermissionObserver.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/dom/permission/PermissionObserver.cpp b/dom/permission/PermissionObserver.cpp new file mode 100644 index 0000000000..47e1a23918 --- /dev/null +++ b/dom/permission/PermissionObserver.cpp @@ -0,0 +1,115 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "PermissionObserver.h" + +#include "mozilla/dom/PermissionStatus.h" +#include "mozilla/Services.h" +#include "mozilla/UniquePtr.h" +#include "nsIObserverService.h" +#include "nsIPermission.h" +#include "PermissionUtils.h" + +namespace mozilla::dom { + +namespace { +PermissionObserver* gInstance = nullptr; +} // namespace + +NS_IMPL_ISUPPORTS(PermissionObserver, nsIObserver, nsISupportsWeakReference) + +PermissionObserver::PermissionObserver() { MOZ_ASSERT(!gInstance); } + +PermissionObserver::~PermissionObserver() { + MOZ_ASSERT(mSinks.IsEmpty()); + MOZ_ASSERT(gInstance == this); + + gInstance = nullptr; +} + +/* static */ +already_AddRefed<PermissionObserver> PermissionObserver::GetInstance() { + RefPtr<PermissionObserver> instance = gInstance; + if (!instance) { + instance = new PermissionObserver(); + + nsCOMPtr<nsIObserverService> obs = services::GetObserverService(); + if (NS_WARN_IF(!obs)) { + return nullptr; + } + + nsresult rv = obs->AddObserver(instance, "perm-changed", true); + if (NS_WARN_IF(NS_FAILED(rv))) { + return nullptr; + } + + gInstance = instance; + } + + return instance.forget(); +} + +void PermissionObserver::AddSink(PermissionStatus* aSink) { + MOZ_ASSERT(aSink); + MOZ_ASSERT(!mSinks.Contains(aSink)); + + mSinks.AppendElement(aSink); +} + +void PermissionObserver::RemoveSink(PermissionStatus* aSink) { + MOZ_ASSERT(aSink); + MOZ_ASSERT(mSinks.Contains(aSink)); + + mSinks.RemoveElement(aSink); +} + +void PermissionObserver::Notify(PermissionName aName, + nsIPrincipal& aPrincipal) { + for (auto* sink : mSinks) { + if (sink->mName != aName) { + continue; + } + + nsCOMPtr<nsIPrincipal> sinkPrincipal = sink->GetPrincipal(); + if (NS_WARN_IF(!sinkPrincipal) || !aPrincipal.Equals(sinkPrincipal)) { + continue; + } + + sink->PermissionChanged(); + } +} + +NS_IMETHODIMP +PermissionObserver::Observe(nsISupports* aSubject, const char* aTopic, + const char16_t* aData) { + MOZ_ASSERT(!strcmp(aTopic, "perm-changed")); + + if (mSinks.IsEmpty()) { + return NS_OK; + } + + nsCOMPtr<nsIPermission> perm = do_QueryInterface(aSubject); + if (!perm) { + return NS_OK; + } + + nsCOMPtr<nsIPrincipal> principal; + perm->GetPrincipal(getter_AddRefs(principal)); + if (!principal) { + return NS_OK; + } + + nsAutoCString type; + perm->GetType(type); + Maybe<PermissionName> permission = TypeToPermissionName(type); + if (permission) { + Notify(permission.value(), *principal); + } + + return NS_OK; +} + +} // namespace mozilla::dom |