gecko-dev/dom/ipc/TabContext.cpp

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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/TabContext.h"
#include "mozilla/dom/PTabContext.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/dom/TabChild.h"
#include "nsIAppsService.h"
#include "nsIScriptSecurityManager.h"
#include "nsServiceManagerUtils.h"
#define NO_APP_ID (nsIScriptSecurityManager::NO_APP_ID)
using namespace mozilla::dom::ipc;
using namespace mozilla::layout;
namespace mozilla {
namespace dom {
TabContext::TabContext()
: mIsPrerendered(false)
, mInitialized(false)
, mIsMozBrowserElement(false)
, mContainingAppId(NO_APP_ID)
, mShowAccelerators(UIStateChangeType_NoChange)
, mShowFocusRings(UIStateChangeType_NoChange)
{
}
bool
TabContext::IsMozBrowserElement() const
{
return mIsMozBrowserElement;
}
bool
TabContext::IsIsolatedMozBrowserElement() const
{
return mOriginAttributes.mInIsolatedMozBrowser;
}
bool
TabContext::IsMozBrowserOrApp() const
{
return HasOwnApp() || IsMozBrowserElement();
}
uint32_t
TabContext::OwnAppId() const
{
return mOriginAttributes.mAppId;
}
already_AddRefed<mozIApplication>
TabContext::GetOwnApp() const
{
nsCOMPtr<mozIApplication> ownApp = mOwnApp;
return ownApp.forget();
}
bool
TabContext::HasOwnApp() const
{
nsCOMPtr<mozIApplication> ownApp = GetOwnApp();
return !!ownApp;
}
uint32_t
TabContext::BrowserOwnerAppId() const
{
if (IsMozBrowserElement()) {
return mContainingAppId;
}
return NO_APP_ID;
}
already_AddRefed<mozIApplication>
TabContext::GetBrowserOwnerApp() const
{
nsCOMPtr<mozIApplication> ownerApp;
if (IsMozBrowserElement()) {
ownerApp = mContainingApp;
}
return ownerApp.forget();
}
bool
TabContext::HasBrowserOwnerApp() const
{
nsCOMPtr<mozIApplication> ownerApp = GetBrowserOwnerApp();
return !!ownerApp;
}
uint32_t
TabContext::AppOwnerAppId() const
{
if (HasOwnApp()) {
return mContainingAppId;
}
return NO_APP_ID;
}
already_AddRefed<mozIApplication>
TabContext::GetAppOwnerApp() const
{
nsCOMPtr<mozIApplication> ownerApp;
if (HasOwnApp()) {
ownerApp = mContainingApp;
}
return ownerApp.forget();
}
bool
TabContext::HasAppOwnerApp() const
{
nsCOMPtr<mozIApplication> ownerApp = GetAppOwnerApp();
return !!ownerApp;
}
uint32_t
TabContext::OwnOrContainingAppId() const
{
if (HasOwnApp()) {
return mOriginAttributes.mAppId;
}
return mContainingAppId;
}
already_AddRefed<mozIApplication>
TabContext::GetOwnOrContainingApp() const
{
nsCOMPtr<mozIApplication> ownOrContainingApp;
if (HasOwnApp()) {
ownOrContainingApp = mOwnApp;
} else {
ownOrContainingApp = mContainingApp;
}
return ownOrContainingApp.forget();
}
bool
TabContext::HasOwnOrContainingApp() const
{
nsCOMPtr<mozIApplication> ownOrContainingApp = GetOwnOrContainingApp();
return !!ownOrContainingApp;
}
bool
TabContext::SetTabContext(const TabContext& aContext)
{
NS_ENSURE_FALSE(mInitialized, false);
*this = aContext;
mInitialized = true;
return true;
}
void
TabContext::SetPrivateBrowsingAttributes(bool aIsPrivateBrowsing)
{
mOriginAttributes.SyncAttributesWithPrivateBrowsing(aIsPrivateBrowsing);
}
bool
TabContext::UpdateTabContextAfterSwap(const TabContext& aContext)
{
// This is only used after already initialized.
MOZ_ASSERT(mInitialized);
// The only permissable change is to `mIsMozBrowserElement`. All other fields
// must match for the change to be accepted.
if (aContext.OwnAppId() != OwnAppId() ||
aContext.mContainingAppId != mContainingAppId ||
aContext.mOriginAttributes != mOriginAttributes) {
return false;
}
mIsMozBrowserElement = aContext.mIsMozBrowserElement;
return true;
}
const DocShellOriginAttributes&
TabContext::OriginAttributesRef() const
{
return mOriginAttributes;
}
const nsAString&
TabContext::PresentationURL() const
{
return mPresentationURL;
}
UIStateChangeType
TabContext::ShowAccelerators() const
{
return mShowAccelerators;
}
UIStateChangeType
TabContext::ShowFocusRings() const
{
return mShowFocusRings;
}
bool
TabContext::SetTabContext(bool aIsMozBrowserElement,
bool aIsPrerendered,
mozIApplication* aOwnApp,
mozIApplication* aAppFrameOwnerApp,
UIStateChangeType aShowAccelerators,
UIStateChangeType aShowFocusRings,
const DocShellOriginAttributes& aOriginAttributes,
const nsAString& aPresentationURL)
{
NS_ENSURE_FALSE(mInitialized, false);
// Get ids for both apps and only write to our member variables after we've
// verified that this worked.
uint32_t ownAppId = NO_APP_ID;
if (aOwnApp) {
nsresult rv = aOwnApp->GetLocalId(&ownAppId);
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(ownAppId != NO_APP_ID, false);
}
uint32_t containingAppId = NO_APP_ID;
if (aAppFrameOwnerApp) {
nsresult rv = aAppFrameOwnerApp->GetLocalId(&containingAppId);
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(containingAppId != NO_APP_ID, false);
}
// Veryify that app id matches mAppId passed in originAttributes
MOZ_RELEASE_ASSERT((aOwnApp && aOriginAttributes.mAppId == ownAppId) ||
(aAppFrameOwnerApp && aOriginAttributes.mAppId == containingAppId) ||
aOriginAttributes.mAppId == NO_APP_ID);
mInitialized = true;
mIsMozBrowserElement = aIsMozBrowserElement;
mIsPrerendered = aIsPrerendered;
mOriginAttributes = aOriginAttributes;
mContainingAppId = containingAppId;
mOwnApp = aOwnApp;
mContainingApp = aAppFrameOwnerApp;
mPresentationURL = aPresentationURL;
mShowAccelerators = aShowAccelerators;
mShowFocusRings = aShowFocusRings;
return true;
}
IPCTabContext
TabContext::AsIPCTabContext() const
{
return IPCTabContext(FrameIPCTabContext(mOriginAttributes,
mContainingAppId,
mIsMozBrowserElement,
mIsPrerendered,
mPresentationURL,
mShowAccelerators,
mShowFocusRings));
}
static already_AddRefed<mozIApplication>
GetAppForId(uint32_t aAppId)
{
nsCOMPtr<nsIAppsService> appsService = do_GetService(APPS_SERVICE_CONTRACTID);
NS_ENSURE_TRUE(appsService, nullptr);
nsCOMPtr<mozIApplication> app;
appsService->GetAppByLocalId(aAppId, getter_AddRefs(app));
return app.forget();
}
MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
: mInvalidReason(nullptr)
{
bool isMozBrowserElement = false;
bool isPrerendered = false;
uint32_t containingAppId = NO_APP_ID;
DocShellOriginAttributes originAttributes;
nsAutoString presentationURL;
UIStateChangeType showAccelerators = UIStateChangeType_NoChange;
UIStateChangeType showFocusRings = UIStateChangeType_NoChange;
switch(aParams.type()) {
case IPCTabContext::TPopupIPCTabContext: {
const PopupIPCTabContext &ipcContext = aParams.get_PopupIPCTabContext();
TabContext *context;
if (ipcContext.opener().type() == PBrowserOrId::TPBrowserParent) {
context = TabParent::GetFrom(ipcContext.opener().get_PBrowserParent());
if (!context) {
mInvalidReason = "Child is-browser process tried to "
"open a null tab.";
return;
}
if (context->IsMozBrowserElement() &&
!ipcContext.isMozBrowserElement()) {
// If the TabParent corresponds to a browser element, then it can only
// open other browser elements, for security reasons. We should have
// checked this before calling the TabContext constructor, so this is
// a fatal error.
mInvalidReason = "Child is-browser process tried to "
"open a non-browser tab.";
return;
}
} else if (ipcContext.opener().type() == PBrowserOrId::TPBrowserChild) {
context = static_cast<TabChild*>(ipcContext.opener().get_PBrowserChild());
} else if (ipcContext.opener().type() == PBrowserOrId::TTabId) {
// We should never get here because this PopupIPCTabContext is only
// used for allocating a new tab id, not for allocating a PBrowser.
mInvalidReason = "Child process tried to open an tab without the opener information.";
return;
} else {
// This should be unreachable because PopupIPCTabContext::opener is not a
// nullable field.
mInvalidReason = "PopupIPCTabContext::opener was null (?!).";
return;
}
// Browser elements can't nest other browser elements. So if
// our opener is browser element, we must be a new DOM window
// opened by it. In that case we inherit our containing app ID
// (if any).
//
// Otherwise, we're a new app window and we inherit from our
// opener app.
isMozBrowserElement = ipcContext.isMozBrowserElement();
originAttributes = context->mOriginAttributes;
if (isMozBrowserElement) {
containingAppId = context->OwnOrContainingAppId();
} else {
containingAppId = context->mContainingAppId;
}
break;
}
case IPCTabContext::TFrameIPCTabContext: {
const FrameIPCTabContext &ipcContext =
aParams.get_FrameIPCTabContext();
isMozBrowserElement = ipcContext.isMozBrowserElement();
isPrerendered = ipcContext.isPrerendered();
containingAppId = ipcContext.frameOwnerAppId();
presentationURL = ipcContext.presentationURL();
showAccelerators = ipcContext.showAccelerators();
showFocusRings = ipcContext.showFocusRings();
originAttributes = ipcContext.originAttributes();
break;
}
case IPCTabContext::TUnsafeIPCTabContext: {
// XXXcatalinb: This used *only* by ServiceWorkerClients::OpenWindow.
// It is meant as a temporary solution until service workers can
// provide a TabChild equivalent. Don't allow this on b2g since
// it might be used to escalate privileges.
#ifdef MOZ_B2G
mInvalidReason = "ServiceWorkerClients::OpenWindow is not supported.";
return;
#endif
if (!Preferences::GetBool("dom.serviceWorkers.enabled", false)) {
mInvalidReason = "ServiceWorkers should be enabled.";
return;
}
containingAppId = NO_APP_ID;
break;
}
default: {
MOZ_CRASH();
}
}
nsCOMPtr<mozIApplication> ownApp;
if (!isMozBrowserElement) {
// mAppId corresponds to OwnOrContainingAppId; if isMozBrowserElement is
// false then it's ownApp otherwise it's containingApp
ownApp = GetAppForId(originAttributes.mAppId);
if ((ownApp == nullptr) != (originAttributes.mAppId == NO_APP_ID)) {
mInvalidReason = "Got an ownAppId that didn't correspond to an app.";
return;
}
}
nsCOMPtr<mozIApplication> containingApp = GetAppForId(containingAppId);
if ((containingApp == nullptr) != (containingAppId == NO_APP_ID)) {
mInvalidReason = "Got a containingAppId that didn't correspond to an app.";
return;
}
bool rv;
rv = mTabContext.SetTabContext(isMozBrowserElement,
isPrerendered,
ownApp,
containingApp,
showAccelerators,
showFocusRings,
originAttributes,
presentationURL);
if (!rv) {
mInvalidReason = "Couldn't initialize TabContext.";
}
}
bool
MaybeInvalidTabContext::IsValid()
{
return mInvalidReason == nullptr;
}
const char*
MaybeInvalidTabContext::GetInvalidReason()
{
return mInvalidReason;
}
const TabContext&
MaybeInvalidTabContext::GetTabContext()
{
if (!IsValid()) {
MOZ_CRASH("Can't GetTabContext() if !IsValid().");
}
return mTabContext;
}
} // namespace dom
} // namespace mozilla