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/* -*- 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 "mozilla/dom/PermissionStatus.h"
#include "mozilla/PermissionDelegateHandler.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/Permission.h"
#include "mozilla/Services.h"
#include "nsIPermissionManager.h"
#include "PermissionObserver.h"
#include "PermissionUtils.h"
namespace mozilla::dom {
PermissionStatus::PermissionStatus(nsPIDOMWindowInner* aWindow,
PermissionName aName)
: DOMEventTargetHelper(aWindow),
mName(aName),
mState(PermissionState::Denied) {
KeepAliveIfHasListenersFor(nsGkAtoms::onchange);
}
// https://w3c.github.io/permissions/#onchange-attribute and
// https://w3c.github.io/permissions/#query-method
RefPtr<PermissionStatus::SimplePromise> PermissionStatus::Init() {
// Covers the onchange part
// Whenever the user agent is aware that the state of a PermissionStatus
// instance status has changed: ...
// (The observer calls PermissionChanged() to do the steps)
mObserver = PermissionObserver::GetInstance();
if (NS_WARN_IF(!mObserver)) {
return SimplePromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
mObserver->AddSink(this);
// Covers the query part (Step 8.2 - 8.4)
return UpdateState();
}
PermissionStatus::~PermissionStatus() {
if (mObserver) {
mObserver->RemoveSink(this);
}
}
JSObject* PermissionStatus::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return PermissionStatus_Binding::Wrap(aCx, this, aGivenProto);
}
nsLiteralCString PermissionStatus::GetPermissionType() const {
return PermissionNameToType(mName);
}
// Covers the calling part of "permission query algorithm" of query() method and
// update steps, which calls
// https://w3c.github.io/permissions/#dfn-default-permission-query-algorithm
// and then https://w3c.github.io/permissions/#dfn-permission-state
RefPtr<PermissionStatus::SimplePromise> PermissionStatus::UpdateState() {
// Step 1: If settings wasn't passed, set it to the current settings object.
// Step 2: If settings is a non-secure context, return "denied".
// XXX(krosylight): No such steps here, and no WPT coverage?
// The permission handler covers the rest of the steps, although the model
// does not exactly match what the spec has. (Not passing "permission key" for
// example)
nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
if (NS_WARN_IF(!window)) {
return SimplePromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
RefPtr<Document> document = window->GetExtantDoc();
if (NS_WARN_IF(!document)) {
return SimplePromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
uint32_t action = nsIPermissionManager::DENY_ACTION;
PermissionDelegateHandler* permissionHandler =
document->GetPermissionDelegateHandler();
if (NS_WARN_IF(!permissionHandler)) {
return SimplePromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
nsresult rv = permissionHandler->GetPermissionForPermissionsAPI(
GetPermissionType(), &action);
if (NS_WARN_IF(NS_FAILED(rv))) {
return SimplePromise::CreateAndReject(rv, __func__);
}
mState = ActionToPermissionState(action);
return SimplePromise::CreateAndResolve(NS_OK, __func__);
}
bool PermissionStatus::MaybeUpdatedBy(nsIPermission* aPermission) const {
NS_ENSURE_TRUE(aPermission, false);
nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
if (NS_WARN_IF(!window)) {
return false;
}
Document* doc = window->GetExtantDoc();
if (NS_WARN_IF(!doc)) {
return false;
}
nsCOMPtr<nsIPrincipal> principal =
Permission::ClonePrincipalForPermission(doc->NodePrincipal());
NS_ENSURE_TRUE(principal, false);
nsCOMPtr<nsIPrincipal> permissionPrincipal;
aPermission->GetPrincipal(getter_AddRefs(permissionPrincipal));
if (!permissionPrincipal) {
return false;
}
return permissionPrincipal->Equals(principal);
}
bool PermissionStatus::MaybeUpdatedByNotifyOnly(
nsPIDOMWindowInner* aInnerWindow) const {
return false;
}
// https://w3c.github.io/permissions/#dfn-permissionstatus-update-steps
void PermissionStatus::PermissionChanged() {
auto oldState = mState;
RefPtr<PermissionStatus> self(this);
// Step 1: If this's relevant global object is a Window object, then:
// Step 1.1: Let document be status's relevant global object's associated
// Document.
// Step 1.2: If document is null or document is not fully active,
// terminate this algorithm.
// TODO(krosylight): WPT /permissions/non-fully-active.https.html fails
// because we don't do this. See bug 1876470.
// Step 2 - 3 is covered by UpdateState()
UpdateState()->Then(
GetMainThreadSerialEventTarget(), __func__,
[self, oldState]() {
if (self->mState != oldState) {
// Step 4: Queue a task on the permissions task source to fire an
// event named change at status.
RefPtr<AsyncEventDispatcher> eventDispatcher =
new AsyncEventDispatcher(self.get(), u"change"_ns,
CanBubble::eNo);
eventDispatcher->PostDOMEvent();
}
},
[]() {
});
}
void PermissionStatus::DisconnectFromOwner() {
IgnoreKeepAliveIfHasListenersFor(nsGkAtoms::onchange);
if (mObserver) {
mObserver->RemoveSink(this);
mObserver = nullptr;
}
DOMEventTargetHelper::DisconnectFromOwner();
}
void PermissionStatus::GetType(nsACString& aName) const {
aName.Assign(GetPermissionType());
}
} // namespace mozilla::dom
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