nsXRemoteServer.cpp

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:expandtab:shiftwidth=2:tabstop=8:

*/

/* 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/ArrayUtils.h"

#include "nsXRemoteServer.h"

#include "nsCOMPtr.h"

#include "nsICommandLine.h"

#include "nsIWidget.h"

#include "nsAppShellCID.h"

#include "nsPIDOMWindow.h"

#include "mozilla/X11Util.h"

#include "nsCOMPtr.h"

#include "nsString.h"

#include "prenv.h"

#include "nsCRT.h"

#include "nsXULAppAPI.h"

#include <X11/Xlib.h>

#include <X11/Xatom.h>

using namespace mozilla;

#define MOZILLA_VERSION_PROP "_MOZILLA_VERSION"

#define MOZILLA_LOCK_PROP "_MOZILLA_LOCK"

#define MOZILLA_RESPONSE_PROP "_MOZILLA_RESPONSE"

#define MOZILLA_USER_PROP "_MOZILLA_USER"

#define MOZILLA_PROFILE_PROP "_MOZILLA_PROFILE"

#define MOZILLA_PROGRAM_PROP "_MOZILLA_PROGRAM"

#define MOZILLA_COMMANDLINE_PROP "_MOZILLA_COMMANDLINE"

const unsigned char kRemoteVersion[] = "5.1";

// Minimize the roundtrips to the X server by getting all the atoms at once

static const char* XAtomNames[] = {

    MOZILLA_VERSION_PROP,    MOZILLA_LOCK_PROP,    MOZILLA_RESPONSE_PROP,

    MOZILLA_USER_PROP,       MOZILLA_PROFILE_PROP, MOZILLA_PROGRAM_PROP,

    MOZILLA_COMMANDLINE_PROP};

static Atom XAtoms[std::size(XAtomNames)];

Atom nsXRemoteServer::sMozVersionAtom;

Atom nsXRemoteServer::sMozLockAtom;

Atom nsXRemoteServer::sMozResponseAtom;

Atom nsXRemoteServer::sMozUserAtom;

Atom nsXRemoteServer::sMozProfileAtom;

Atom nsXRemoteServer::sMozProgramAtom;

Atom nsXRemoteServer::sMozCommandLineAtom;

nsXRemoteServer::nsXRemoteServer() = default;

void nsXRemoteServer::XRemoteBaseStartup(const char* aAppName,

                                         const char* aProfileName) {

  EnsureAtoms();

  mAppName = aAppName;

  ToLowerCase(mAppName);

  mProfileName = aProfileName;

void nsXRemoteServer::HandleCommandsFor(Window aWindowId) {

  // set our version

  XChangeProperty(mozilla::DefaultXDisplay(), aWindowId, sMozVersionAtom,

                  XA_STRING, 8, PropModeReplace, kRemoteVersion,

                  sizeof(kRemoteVersion) - 1);

  // get our username

  unsigned char* logname;

  logname = (unsigned char*)PR_GetEnv("LOGNAME");

  if (logname) {

    // set the property on the window if it's available

    XChangeProperty(mozilla::DefaultXDisplay(), aWindowId, sMozUserAtom,

                    XA_STRING, 8, PropModeReplace, logname,

                    strlen((char*)logname));

  XChangeProperty(mozilla::DefaultXDisplay(), aWindowId, sMozProgramAtom,

                  XA_STRING, 8, PropModeReplace, (unsigned char*)mAppName.get(),

                  mAppName.Length());

  XChangeProperty(mozilla::DefaultXDisplay(), aWindowId, sMozProfileAtom,

                  XA_STRING, 8, PropModeReplace,

                  (unsigned char*)mProfileName.get(), mProfileName.Length());

bool nsXRemoteServer::HandleNewProperty(XID aWindowId, Display* aDisplay,

                                        Time aEventTime, Atom aChangedAtom) {

  if (aChangedAtom == sMozCommandLineAtom) {

    // We got a new command atom.

    int result;

    Atom actual_type;

    int actual_format;

    unsigned long len, bytes_after;

    char* data = 0;

    result = XGetWindowProperty(aDisplay, aWindowId, aChangedAtom,

                                0,                      /* long_offset */

                                (65536 / sizeof(long)), /* long_length */

                                X11True,        /* atomic delete after */

                                XA_STRING,      /* req_type */

                                &actual_type,   /* actual_type return */

                                &actual_format, /* actual_format_return */

                                &len,           /* nitems_return */

                                &bytes_after,   /* bytes_after_return */

                                (unsigned char**)&data); /* prop_return

                                                            (we only care

                                                            about the first ) */

    // Failed to get property off the window or

    // got a part only

    if (result != Success || bytes_after != 0) {

      return false;

    // Failed to get the data off the window or it was the wrong type?

    if (!data || !TO_LITTLE_ENDIAN32(*reinterpret_cast<int32_t*>(data))) {

      return false;

    // cool, we got the property data.

    const char* response = HandleCommandLine(Span(data, len), aEventTime);

    // put the property onto the window as the response

    XChangeProperty(aDisplay, aWindowId, sMozResponseAtom, XA_STRING, 8,

                    PropModeReplace, (const unsigned char*)response,

                    strlen(response));

    XFree(data);

    return true;

  if (aChangedAtom == sMozResponseAtom) {

    // client accepted the response.  party on wayne.

    return true;

  else if (aChangedAtom == sMozLockAtom) {

    // someone locked the window

    return true;

  return false;

void nsXRemoteServer::EnsureAtoms(void) {

  if (sMozVersionAtom) return;

  XInternAtoms(mozilla::DefaultXDisplay(), const_cast<char**>(XAtomNames),

               std::size(XAtomNames), X11False, XAtoms);

  int i = 0;

  sMozVersionAtom = XAtoms[i++];

  sMozLockAtom = XAtoms[i++];

  sMozResponseAtom = XAtoms[i++];

  sMozUserAtom = XAtoms[i++];

  sMozProfileAtom = XAtoms[i++];

  sMozProgramAtom = XAtoms[i++];

  sMozCommandLineAtom = XAtoms[i];