gecko-dev/dom/ipc/TabContext.cpp

254 строки
8.5 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/StaticPrefs.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),
mChromeOuterWindowID(0),
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; }
uint64_t TabContext::ChromeOuterWindowID() const {
return mChromeOuterWindowID;
}
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 changes are to `mIsMozBrowserElement` and
// mChromeOuterWindowID. All other fields must match for the change
// to be accepted.
if (aContext.mOriginAttributes != mOriginAttributes) {
return false;
}
mChromeOuterWindowID = aContext.mChromeOuterWindowID;
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,
uint64_t aChromeOuterWindowID,
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;
mChromeOuterWindowID = aChromeOuterWindowID;
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, mChromeOuterWindowID,
mPresentationURL, mShowAccelerators, mShowFocusRings));
}
MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
: mInvalidReason(nullptr) {
bool isMozBrowserElement = false;
uint64_t chromeOuterWindowID = 0;
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;
chromeOuterWindowID = ipcContext.chromeOuterWindowID();
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();
chromeOuterWindowID = ipcContext.chromeOuterWindowID();
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 (!StaticPrefs::dom_serviceWorkers_enabled()) {
mInvalidReason = "ServiceWorkers should be enabled.";
return;
}
break;
}
default: { MOZ_CRASH(); }
}
bool rv;
if (jsPluginId >= 0) {
rv = mTabContext.SetTabContextForJSPluginFrame(jsPluginId);
} else {
rv = mTabContext.SetTabContext(isMozBrowserElement, chromeOuterWindowID,
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