gecko-dev/dom/ipc/PTabContext.ipdlh
Kartikaya Gupta 2ccb1ce2ad Bug 1130455 - Remove the ScrollingBehavior code to propagate APZ and use gfxPrefs instead. r=roc,fabrice
The ScrollingBehavior passed around extensively in TabParent/TabChild is
entirely redundant now that the layers.async-pan-zoom.enabled pref definitively
controls whether or not APZ is enabled. All the code related to ScrollingBehavior
can be removed.
2015-02-26 08:47:01 -05:00

75 lines
2.3 KiB
C++

/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
/* 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 protocol PBrowser;
include PBrowserOrId;
namespace mozilla {
namespace dom {
// An IPCTabContext which corresponds to a PBrowser opened by a child when it
// receives window.open().
//
// If isBrowserElement is false, this PopupIPCTabContext corresponds to an app
// frame, and the frame's app-id and app-frame-owner-app-id will be equal to the
// opener's values.
//
// If isBrowserElement is true, the frame's browserFrameOwnerAppId will be equal
// to the opener's app-id.
//
// It's an error to set isBrowserElement == false if opener is a browser
// element. Such a PopupIPCTabContext should be rejected by code which receives
// it.
struct PopupIPCTabContext
{
PBrowserOrId opener;
bool isBrowserElement;
};
// An IPCTabContext which corresponds to an app frame.
struct AppFrameIPCTabContext
{
// The ID of the app this frame corresponds to. May be NO_APP_ID.
uint32_t ownAppId;
// The ID of the app containing this frame. May be NO_APP_ID.
uint32_t appFrameOwnerAppId;
};
// An IPCTabContext which corresponds to a browser frame.
struct BrowserFrameIPCTabContext
{
// The ID of the app which contains this browser frame. May be NO_APP_ID.
uint32_t browserFrameOwnerAppId;
};
// This is equivalent to AppFrameIPCTabContext with all fields set to NO_APP_ID.
struct VanillaFrameIPCTabContext
{};
// IPCTabContext is an analog to mozilla::dom::TabContext. Both specify an
// iframe/PBrowser's own and containing app-ids and tell you whether the
// iframe/PBrowser is a browser frame. But only IPCTabContext is allowed to
// travel over IPC.
//
// We need IPCTabContext (specifically, PopupIPCTabContext) to prevent a
// privilege escalation attack by a compromised child process. See the comment
// on AllocPBrowser for details.
union IPCTabAppBrowserContext
{
PopupIPCTabContext;
AppFrameIPCTabContext;
BrowserFrameIPCTabContext;
VanillaFrameIPCTabContext;
};
struct IPCTabContext {
IPCTabAppBrowserContext appBrowserContext;
};
}
}