DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (1aeaa33a64f9)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
/* -*- 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/AsyncEventDispatcher.h"
#include "mozilla/Services.h"
#include "nsIPermissionManager.h"
#include "PermissionObserver.h"
#include "PermissionUtils.h"

namespace mozilla {
namespace dom {

/* static */ already_AddRefed<PermissionStatus> PermissionStatus::Create(
    nsPIDOMWindowInner* aWindow, PermissionName aName, ErrorResult& aRv) {
  RefPtr<PermissionStatus> status = new PermissionStatus(aWindow, aName);
  aRv = status->Init();
  if (NS_WARN_IF(aRv.Failed())) {
    return nullptr;
  }

  return status.forget();
}

PermissionStatus::PermissionStatus(nsPIDOMWindowInner* aWindow,
                                   PermissionName aName)
    : DOMEventTargetHelper(aWindow),
      mName(aName),
      mState(PermissionState::Denied) {}

nsresult PermissionStatus::Init() {
  mObserver = PermissionObserver::GetInstance();
  if (NS_WARN_IF(!mObserver)) {
    return NS_ERROR_FAILURE;
  }

  mObserver->AddSink(this);

  nsresult rv = UpdateState();
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  return NS_OK;
}

PermissionStatus::~PermissionStatus() {
  if (mObserver) {
    mObserver->RemoveSink(this);
  }
}

JSObject* PermissionStatus::WrapObject(JSContext* aCx,
                                       JS::Handle<JSObject*> aGivenProto) {
  return PermissionStatusBinding::Wrap(aCx, this, aGivenProto);
}

nsresult PermissionStatus::UpdateState() {
  nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
  if (NS_WARN_IF(!permMgr)) {
    return NS_ERROR_FAILURE;
  }

  nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
  if (NS_WARN_IF(!window)) {
    return NS_ERROR_FAILURE;
  }

  uint32_t action = nsIPermissionManager::DENY_ACTION;
  nsresult rv = permMgr->TestPermissionFromWindow(
      window, PermissionNameToType(mName), &action);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  mState = ActionToPermissionState(action);
  return NS_OK;
}

already_AddRefed<nsIPrincipal> PermissionStatus::GetPrincipal() const {
  nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
  if (NS_WARN_IF(!window)) {
    return nullptr;
  }

  nsIDocument* doc = window->GetExtantDoc();
  if (NS_WARN_IF(!doc)) {
    return nullptr;
  }

  nsCOMPtr<nsIPrincipal> principal =
      mozilla::BasePrincipal::Cast(doc->NodePrincipal())
          ->CloneStrippingUserContextIdAndFirstPartyDomain();
  NS_ENSURE_TRUE(principal, nullptr);

  return principal.forget();
}

void PermissionStatus::PermissionChanged() {
  auto oldState = mState;
  UpdateState();
  if (mState != oldState) {
    RefPtr<AsyncEventDispatcher> eventDispatcher =
        new AsyncEventDispatcher(this, NS_LITERAL_STRING("change"), false);
    eventDispatcher->PostDOMEvent();
  }
}

}  // namespace dom
}  // namespace mozilla