gecko-dev/dom/ipc/TabContext.cpp

295 строки
8.2 KiB
C++

/* -*- 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 "mozilla/dom/DOMPrefs.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()
: mInitialized(false)
, mIsMozBrowserElement(false)
, mJSPluginID(-1)
, mShowAccelerators(UIStateChangeType_NoChange)
, mShowFocusRings(UIStateChangeType_NoChange)
{
}
bool
TabContext::IsMozBrowserElement() const
{
return mIsMozBrowserElement;
}
bool
TabContext::IsIsolatedMozBrowserElement() const
{
return mOriginAttributes.mInIsolatedMozBrowser;
}
bool
TabContext::IsMozBrowser() const
{
return IsMozBrowserElement();
}
bool
TabContext::IsJSPlugin() const
{
return mJSPluginID >= 0;
}
int32_t
TabContext::JSPluginId() const
{
return mJSPluginID;
}
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.mOriginAttributes != mOriginAttributes) {
return false;
}
mIsMozBrowserElement = aContext.mIsMozBrowserElement;
return true;
}
const OriginAttributes&
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,
UIStateChangeType aShowAccelerators,
UIStateChangeType aShowFocusRings,
const OriginAttributes& aOriginAttributes,
const nsAString& aPresentationURL)
{
NS_ENSURE_FALSE(mInitialized, false);
// Veryify that app id matches mAppId passed in originAttributes
MOZ_RELEASE_ASSERT(aOriginAttributes.mAppId == NO_APP_ID);
mInitialized = true;
mIsMozBrowserElement = aIsMozBrowserElement;
mOriginAttributes = aOriginAttributes;
mPresentationURL = aPresentationURL;
mShowAccelerators = aShowAccelerators;
mShowFocusRings = aShowFocusRings;
return true;
}
bool
TabContext::SetTabContextForJSPluginFrame(int32_t aJSPluginID)
{
NS_ENSURE_FALSE(mInitialized, false);
mInitialized = true;
mJSPluginID = aJSPluginID;
return true;
}
IPCTabContext
TabContext::AsIPCTabContext() const
{
if (IsJSPlugin()) {
return IPCTabContext(JSPluginFrameIPCTabContext(mJSPluginID));
}
return IPCTabContext(FrameIPCTabContext(mOriginAttributes,
mIsMozBrowserElement,
mPresentationURL,
mShowAccelerators,
mShowFocusRings));
}
MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
: mInvalidReason(nullptr)
{
bool isMozBrowserElement = false;
int32_t jsPluginId = -1;
OriginAttributes 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;
break;
}
case IPCTabContext::TJSPluginFrameIPCTabContext: {
const JSPluginFrameIPCTabContext &ipcContext =
aParams.get_JSPluginFrameIPCTabContext();
jsPluginId = ipcContext.jsPluginId();
break;
}
case IPCTabContext::TFrameIPCTabContext: {
const FrameIPCTabContext &ipcContext =
aParams.get_FrameIPCTabContext();
isMozBrowserElement = ipcContext.isMozBrowserElement();
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.
if (!DOMPrefs::ServiceWorkersEnabled()) {
mInvalidReason = "ServiceWorkers should be enabled.";
return;
}
break;
}
default: {
MOZ_CRASH();
}
}
bool rv;
if (jsPluginId >= 0) {
rv = mTabContext.SetTabContextForJSPluginFrame(jsPluginId);
} else {
rv = mTabContext.SetTabContext(isMozBrowserElement,
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