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101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
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/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_plugins_NPEventUnix_h
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#define mozilla_dom_plugins_NPEventUnix_h 1
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#include "npapi.h"
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#ifdef MOZ_X11
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#include "mozilla/X11Util.h"
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#endif
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namespace mozilla {
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namespace plugins {
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struct NPRemoteEvent {
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NPEvent event;
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};
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}
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}
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//
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// XEvent is defined as a union of all more specific X*Events.
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// Luckily, as of xorg 1.6.0 / X protocol 11 rev 0, the only pointer
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// field contained in any of these specific X*Event structs is a
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// |Display*|. So to simplify serializing these XEvents, we make the
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//
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// ********** XXX ASSUMPTION XXX **********
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//
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// that the process to which the event is forwarded shares the same
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// display as the process on which the event originated.
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//
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// With this simplification, serialization becomes a simple memcpy to
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// the output stream. Deserialization starts as just a memcpy from
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// the input stream, BUT we then have to write the correct |Display*|
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// into the right field of each X*Event that contains one.
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//
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namespace IPC {
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template <>
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struct ParamTraits<mozilla::plugins::NPRemoteEvent> // synonym for XEvent
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{
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typedef mozilla::plugins::NPRemoteEvent paramType;
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static void Write(Message* aMsg, const paramType& aParam)
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{
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aMsg->WriteBytes(&aParam, sizeof(paramType));
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}
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static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
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{
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const char* bytes = 0;
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if (!aMsg->ReadBytes(aIter, &bytes, sizeof(paramType))) {
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return false;
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}
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memcpy(aResult, bytes, sizeof(paramType));
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#ifdef MOZ_X11
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SetXDisplay(aResult->event);
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#endif
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return true;
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}
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static void Log(const paramType& aParam, std::wstring* aLog)
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{
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// TODO
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aLog->append(L"(XEvent)");
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}
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#ifdef MOZ_X11
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private:
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static void SetXDisplay(XEvent& ev)
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{
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Display* display = mozilla::DefaultXDisplay();
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if (ev.type >= KeyPress) {
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ev.xany.display = display;
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}
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else {
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// XXX assuming that this is an error event
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// (type == 0? not clear from Xlib.h)
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ev.xerror.display = display;
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}
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}
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#endif
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};
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} // namespace IPC
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#endif // ifndef mozilla_dom_plugins_NPEventX11_h
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