зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
3.3 KiB
C++
129 строки
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/PermissionStatus.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Services.h"
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#include "nsIPermissionManager.h"
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#include "PermissionObserver.h"
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#include "PermissionUtils.h"
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#include "nsPermission.h"
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namespace mozilla {
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namespace dom {
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/* static */
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already_AddRefed<PermissionStatus> PermissionStatus::Create(
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nsPIDOMWindowInner* aWindow, PermissionName aName, ErrorResult& aRv) {
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RefPtr<PermissionStatus> status = new PermissionStatus(aWindow, aName);
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aRv = status->Init();
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if (NS_WARN_IF(aRv.Failed())) {
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return nullptr;
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}
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return status.forget();
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}
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PermissionStatus::PermissionStatus(nsPIDOMWindowInner* aWindow,
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PermissionName aName)
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: DOMEventTargetHelper(aWindow),
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mName(aName),
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mState(PermissionState::Denied) {
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KeepAliveIfHasListenersFor(NS_LITERAL_STRING("change"));
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}
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nsresult PermissionStatus::Init() {
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mObserver = PermissionObserver::GetInstance();
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if (NS_WARN_IF(!mObserver)) {
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return NS_ERROR_FAILURE;
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}
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mObserver->AddSink(this);
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nsresult rv = UpdateState();
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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return NS_OK;
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}
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PermissionStatus::~PermissionStatus() {
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if (mObserver) {
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mObserver->RemoveSink(this);
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}
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}
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JSObject* PermissionStatus::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return PermissionStatus_Binding::Wrap(aCx, this, aGivenProto);
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}
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nsresult PermissionStatus::UpdateState() {
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nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
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if (NS_WARN_IF(!permMgr)) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
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if (NS_WARN_IF(!window)) {
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return NS_ERROR_FAILURE;
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}
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uint32_t action = nsIPermissionManager::DENY_ACTION;
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nsresult rv = permMgr->TestPermissionFromWindow(
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window, PermissionNameToType(mName), &action);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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mState = ActionToPermissionState(action);
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return NS_OK;
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}
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already_AddRefed<nsIPrincipal> PermissionStatus::GetPrincipal() const {
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nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
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if (NS_WARN_IF(!window)) {
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return nullptr;
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}
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Document* doc = window->GetExtantDoc();
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if (NS_WARN_IF(!doc)) {
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return nullptr;
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}
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nsCOMPtr<nsIPrincipal> principal =
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nsPermission::ClonePrincipalForPermission(doc->NodePrincipal());
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NS_ENSURE_TRUE(principal, nullptr);
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return principal.forget();
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}
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void PermissionStatus::PermissionChanged() {
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auto oldState = mState;
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UpdateState();
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if (mState != oldState) {
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RefPtr<AsyncEventDispatcher> eventDispatcher = new AsyncEventDispatcher(
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this, NS_LITERAL_STRING("change"), CanBubble::eNo);
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eventDispatcher->PostDOMEvent();
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}
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}
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void PermissionStatus::DisconnectFromOwner() {
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IgnoreKeepAliveIfHasListenersFor(NS_LITERAL_STRING("change"));
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if (mObserver) {
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mObserver->RemoveSink(this);
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mObserver = nullptr;
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}
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DOMEventTargetHelper::DisconnectFromOwner();
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}
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} // namespace dom
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} // namespace mozilla
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