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/* -*- 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/. */
#ifndef mozilla_dom_plugins_NPEventUnix_h
#define mozilla_dom_plugins_NPEventUnix_h 1
#include "npapi.h"
#ifdef MOZ_X11
#include "mozilla/X11Util.h"
#endif
namespace mozilla {
namespace plugins {
struct NPRemoteEvent {
NPEvent event;
};
}
}
//
// XEvent is defined as a union of all more specific X*Events.
// Luckily, as of xorg 1.6.0 / X protocol 11 rev 0, the only pointer
// field contained in any of these specific X*Event structs is a
// |Display*|. So to simplify serializing these XEvents, we make the
//
// ********** XXX ASSUMPTION XXX **********
//
// that the process to which the event is forwarded shares the same
// display as the process on which the event originated.
//
// With this simplification, serialization becomes a simple memcpy to
// the output stream. Deserialization starts as just a memcpy from
// the input stream, BUT we then have to write the correct |Display*|
// into the right field of each X*Event that contains one.
//
namespace IPC {
template <>
struct ParamTraits<mozilla::plugins::NPRemoteEvent> // synonym for XEvent
{
typedef mozilla::plugins::NPRemoteEvent paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
aMsg->WriteBytes(&aParam, sizeof(paramType));
}
static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
{
if (!aMsg->ReadBytesInto(aIter, aResult, sizeof(paramType))) {
return false;
}
#ifdef MOZ_X11
SetXDisplay(aResult->event);
#endif
return true;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
// TODO
aLog->append(L"(XEvent)");
}
#ifdef MOZ_X11
private:
static void SetXDisplay(XEvent& ev)
{
Display* display = mozilla::DefaultXDisplay();
if (ev.type >= KeyPress) {
ev.xany.display = display;
}
else {
// XXX assuming that this is an error event
// (type == 0? not clear from Xlib.h)
ev.xerror.display = display;
}
}
#endif
};
} // namespace IPC
#endif // ifndef mozilla_dom_plugins_NPEventX11_h
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