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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/Permissions.h"
#include "PermissionUtils.h"
#include "mozilla/StaticPrefs_permissions.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/MidiPermissionStatus.h"
#include "mozilla/dom/PermissionSetParametersBinding.h"
#include "mozilla/dom/PermissionStatus.h"
#include "mozilla/dom/PermissionsBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/RootedDictionary.h"
#include "mozilla/dom/StorageAccessPermissionStatus.h"
namespace mozilla::dom {
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Permissions)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(Permissions)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Permissions)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Permissions)
Permissions::Permissions(nsIGlobalObject* aGlobal)
: GlobalTeardownObserver(aGlobal) {}
Permissions::~Permissions() = default;
JSObject* Permissions::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return Permissions_Binding::Wrap(aCx, this, aGivenProto);
}
namespace {
// Steps to parse PermissionDescriptor in
// https://w3c.github.io/permissions/#query-method and relevant WebDriver
// commands
RefPtr<PermissionStatus> CreatePermissionStatus(
JSContext* aCx, JS::Handle<JSObject*> aPermissionDesc,
nsIGlobalObject* aGlobal, ErrorResult& aRv) {
// Step 2: Let rootDesc be the object permissionDesc refers to, converted to
// an IDL value of type PermissionDescriptor.
PermissionDescriptor rootDesc;
JS::Rooted<JS::Value> permissionDescValue(
aCx, JS::ObjectOrNullValue(aPermissionDesc));
if (NS_WARN_IF(!rootDesc.Init(aCx, permissionDescValue))) {
// Step 3: If the conversion throws an exception, return a promise rejected
// with that exception.
// Step 4: If rootDesc["name"] is not supported, return a promise rejected
// with a TypeError. (This is done by `enum PermissionName`, as the spec
// note says: "implementers are encouraged to use their own custom enum
// here")
aRv.NoteJSContextException(aCx);
return nullptr;
}
// Step 5: Let typedDescriptor be the object permissionDesc refers to,
// converted to an IDL value of rootDesc's name's permission descriptor type.
// Step 6: If the conversion throws an exception, return a promise rejected
// with that exception.
// Step 8.1: Let status be create a PermissionStatus with typedDescriptor.
// (The rest is done by the caller)
switch (rootDesc.mName) {
case PermissionName::Midi: {
MidiPermissionDescriptor midiPerm;
if (NS_WARN_IF(!midiPerm.Init(aCx, permissionDescValue))) {
aRv.NoteJSContextException(aCx);
return nullptr;
}
return new MidiPermissionStatus(aGlobal, midiPerm.mSysex);
}
case PermissionName::Storage_access:
return new StorageAccessPermissionStatus(aGlobal);
case PermissionName::Geolocation:
case PermissionName::Notifications:
case PermissionName::Push:
case PermissionName::Persistent_storage:
case PermissionName::Screen_wake_lock:
return new PermissionStatus(aGlobal, rootDesc.mName);
case PermissionName::Camera:
if (!StaticPrefs::permissions_media_query_enabled()) {
aRv.ThrowTypeError(
"'camera' (value of 'name' member of PermissionDescriptor) is not "
"a valid value for enumeration PermissionName.");
return nullptr;
}
return new PermissionStatus(aGlobal, rootDesc.mName);
case PermissionName::Microphone:
if (!StaticPrefs::permissions_media_query_enabled()) {
aRv.ThrowTypeError(
"'microphone' (value of 'name' member of PermissionDescriptor) is "
"not a valid value for enumeration PermissionName.");
return nullptr;
}
return new PermissionStatus(aGlobal, rootDesc.mName);
default:
MOZ_ASSERT_UNREACHABLE("Unhandled type");
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return nullptr;
}
}
} // namespace
// https://w3c.github.io/permissions/#query-method
already_AddRefed<Promise> Permissions::Query(JSContext* aCx,
JS::Handle<JSObject*> aPermission,
ErrorResult& aRv) {
// Step 1: If this's relevant global object is a Window object, then:
// Step 1.1: If the current settings object's associated Document is not fully
// active, return a promise rejected with an "InvalidStateError" DOMException.
nsCOMPtr<nsIGlobalObject> global = GetOwnerGlobal();
if (NS_WARN_IF(!global)) {
aRv.ThrowInvalidStateError("The context is not fully active.");
return nullptr;
}
if (NS_IsMainThread()) {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(global);
if (!window || !window->IsFullyActive()) {
aRv.ThrowInvalidStateError("The document is not fully active.");
return nullptr;
}
}
// Step 2 - 6 and 8.1:
RefPtr<PermissionStatus> status =
CreatePermissionStatus(aCx, aPermission, global, aRv);
if (!status) {
return nullptr;
}
// Step 7: Let promise be a new promise.
RefPtr<Promise> promise = Promise::Create(global, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// Step 8.2 - 8.3: (Done by the Init method)
// Step 8.4: Queue a global task on the permissions task source with this's
// relevant global object to resolve promise with status.
status->Init()->Then(
GetCurrentSerialEventTarget(), __func__,
[status, promise]() {
promise->MaybeResolve(status);
return;
},
[promise](nsresult aError) {
MOZ_ASSERT(NS_FAILED(aError));
NS_WARNING("Failed PermissionStatus creation");
promise->MaybeReject(aError);
return;
});
return promise.forget();
}
already_AddRefed<PermissionStatus> Permissions::ParseSetParameters(
JSContext* aCx, const PermissionSetParameters& aParameters,
ErrorResult& aRv) {
// Step 1: Let parametersDict be the parameters argument, converted to an IDL
// value of type PermissionSetParameters. If this throws an exception,
// return an invalid argument error.
// (Done by IDL layer, and the error type should be handled by the caller)
// Step 2: If parametersDict.state is an inappropriate permission state for
// any implementation-defined reason, return a invalid argument error.
// (We don't do this)
// Step 3: Let rootDesc be parametersDict.descriptor.
JS::Rooted<JSObject*> rootDesc(aCx, aParameters.mDescriptor);
// Step 4: Let typedDescriptor be the object rootDesc refers to, converted
// to an IDL value of rootDesc.name's permission descriptor type. If this
// throws an exception, return a invalid argument error.
//
// We use PermissionStatus as the typed object.
RefPtr<PermissionStatus> status =
CreatePermissionStatus(aCx, rootDesc, nullptr, aRv);
if (aRv.Failed()) {
return nullptr;
}
// Set the state too so that the caller can use it for step 5.
status->SetState(aParameters.mState);
return status.forget();
}
} // namespace mozilla::dom
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