gecko-dev/dom/ipc/DOMTypes.ipdlh

/* -*- Mode: C++; c-basic-offset: 2; 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 IPCBlob;
include IPCStream;
include ProtocolTypes;

using struct mozilla::void_t
  from "ipc/IPCMessageUtils.h";

using struct mozilla::SerializedStructuredCloneBuffer
  from "ipc/IPCMessageUtils.h";

using LayoutDeviceIntRect from "Units.h";
using DesktopIntRect from "Units.h";
using DesktopToLayoutDeviceScale from "Units.h";
using CSSToLayoutDeviceScale from "Units.h";

namespace mozilla {
namespace dom {

struct MessagePortIdentifier
{
  nsID uuid;
  nsID destinationUuid;
  uint32_t sequenceId;
  bool neutered;
};

/**
 * Cross-process representation for postMessage() style payloads where Blobs may
 * be referenced/"cloned" and (optionally) messageports transferred.  Use
 * StructuredCloneData in your code to convert between this wire representation
 * and the StructuredCloneData StructuredCloneHolder-subclass.
 */
struct ClonedMessageData
{
  SerializedStructuredCloneBuffer data;
  IPCBlob[] blobs;
  IPCStream[] inputStreams;
  MessagePortIdentifier[] identfiers;
};

union IPCDataTransferData
{
  nsString;  // text
  Shmem;     // images using Shmem
  IPCBlob;   // files
};

struct IPCDataTransferImage
{
  uint32_t width;
  uint32_t height;
  uint32_t stride;
  uint8_t format;
};

struct IPCDataTransferItem
{
  nsCString flavor;
  // The image details are only used when transferring images.
  IPCDataTransferImage imageDetails;
  IPCDataTransferData data;
};

struct IPCDataTransfer
{
  IPCDataTransferItem[] items;
};

struct ScreenDetails {
  LayoutDeviceIntRect rect;
  DesktopIntRect rectDisplayPix;
  LayoutDeviceIntRect availRect;
  DesktopIntRect availRectDisplayPix;
  int32_t pixelDepth;
  int32_t colorDepth;
  DesktopToLayoutDeviceScale contentsScaleFactor;
  CSSToLayoutDeviceScale defaultCSSScaleFactor;
};

} // namespace dom
} // namespace mozilla