RemoteUtils.h - mozsearch

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

/* 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 TOOLKIT_COMPONENTS_REMOTE_REMOTEUTILS_H_

#define TOOLKIT_COMPONENTS_REMOTE_REMOTEUTILS_H_

#include "mozilla/HashFunctions.h"

#include "nsString.h"

#if defined XP_WIN

#  include "WinUtils.h"

#endif

#if defined XP_WIN || defined XP_MACOSX

static void BuildClassName(const char* aProgram, const char* aProfile,

                           nsString& aClassName) {

  // On Windows, the class name is used as the window class.

  // The window class name is limited to 256 characters, and it fails when

  // exceeds.

//

  // https://learn.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-wndclassa

//

  // On macOS, the class name is used as the name of message ports.

  // The message port's name is limited to 128 characters, and the characters

  // beyond the length is simply ignored.

//

  // https://github.com/opensource-apple/CF/blob/3cc41a76b1491f50813e28a4ec09954ffa359e6f/CFMessagePort.c#L53

#  if defined XP_WIN

  constexpr size_t ClassNameMaxLength = 256;

#  else

  constexpr size_t ClassNameMaxLength = 128;

#  endif

  aClassName.AppendPrintf("Mozilla_%s", aProgram);

#  if defined XP_WIN

  nsString pfn = mozilla::widget::WinUtils::GetPackageFamilyName();

  if (!pfn.IsEmpty()) {

    aClassName.AppendPrintf("_%S", pfn.getW());

#  endif

  aClassName.AppendPrintf("_%s_RemoteWindow", aProfile);

  if (aClassName.Length() > ClassNameMaxLength) {

    mozilla::HashNumber hash = mozilla::HashString(aClassName.get());

    aClassName.Truncate();

    aClassName.AppendPrintf("Mozilla_%08x_RemoteWindow", hash);

#endif

char* ConstructCommandLine(int32_t argc, const char** argv,

                           const char* aStartupToken, int* aCommandLineLength);

#endif  // TOOLKIT_COMPONENTS_REMOTE_REMOTEUTILS_H_