From 05b22b9372ddacea832c3c13e917ef5fd0842d52 Mon Sep 17 00:00:00 2001
From: Paul Betts <paul@paulbetts.org>
Date: Mon, 19 Oct 2015 11:43:45 -0700
Subject: [PATCH] Import process_finder verbatim

---
 atom/browser/chrome_process_finder_win.cc | 97 +++++++++++++++++++++++
 atom/browser/chrome_process_finder_win.h  | 39 +++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 atom/browser/chrome_process_finder_win.cc
 create mode 100644 atom/browser/chrome_process_finder_win.h

diff --git a/atom/browser/chrome_process_finder_win.cc b/atom/browser/chrome_process_finder_win.cc
new file mode 100644
index 000000000000..13c4a0eb5a56
--- /dev/null
+++ b/atom/browser/chrome_process_finder_win.cc
@@ -0,0 +1,97 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chrome_process_finder_win.h"
+
+#include <shellapi.h>
+#include <string>
+
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/logging.h"
+#include "base/process/process.h"
+#include "base/process/process_info.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/win/message_window.h"
+#include "base/win/scoped_handle.h"
+#include "base/win/win_util.h"
+#include "base/win/windows_version.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_switches.h"
+
+
+namespace {
+
+int timeout_in_milliseconds = 20 * 1000;
+
+}  // namespace
+
+namespace chrome {
+
+HWND FindRunningChromeWindow(const base::FilePath& user_data_dir) {
+  return base::win::MessageWindow::FindWindow(user_data_dir.value());
+}
+
+NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window,
+                                                bool fast_start) {
+  DCHECK(remote_window);
+  DWORD process_id = 0;
+  DWORD thread_id = GetWindowThreadProcessId(remote_window, &process_id);
+  if (!thread_id || !process_id)
+    return NOTIFY_FAILED;
+
+  base::CommandLine command_line(*base::CommandLine::ForCurrentProcess());
+  command_line.AppendSwitchASCII(
+      switches::kOriginalProcessStartTime,
+      base::Int64ToString(
+          base::CurrentProcessInfo::CreationTime().ToInternalValue()));
+
+  if (fast_start)
+    command_line.AppendSwitch(switches::kFastStart);
+
+  // Send the command line to the remote chrome window.
+  // Format is "START\0<<<current directory>>>\0<<<commandline>>>".
+  std::wstring to_send(L"START\0", 6);  // want the NULL in the string.
+  base::FilePath cur_dir;
+  if (!base::GetCurrentDirectory(&cur_dir))
+    return NOTIFY_FAILED;
+  to_send.append(cur_dir.value());
+  to_send.append(L"\0", 1);  // Null separator.
+  to_send.append(command_line.GetCommandLineString());
+  to_send.append(L"\0", 1);  // Null separator.
+
+  // Allow the current running browser window to make itself the foreground
+  // window (otherwise it will just flash in the taskbar).
+  ::AllowSetForegroundWindow(process_id);
+
+  COPYDATASTRUCT cds;
+  cds.dwData = 0;
+  cds.cbData = static_cast<DWORD>((to_send.length() + 1) * sizeof(wchar_t));
+  cds.lpData = const_cast<wchar_t*>(to_send.c_str());
+  DWORD_PTR result = 0;
+  if (::SendMessageTimeout(remote_window, WM_COPYDATA, NULL,
+                           reinterpret_cast<LPARAM>(&cds), SMTO_ABORTIFHUNG,
+                           timeout_in_milliseconds, &result)) {
+    return result ? NOTIFY_SUCCESS : NOTIFY_FAILED;
+  }
+
+  // It is possible that the process owning this window may have died by now.
+  if (!::IsWindow(remote_window))
+    return NOTIFY_FAILED;
+
+  // If the window couldn't be notified but still exists, assume it is hung.
+  return NOTIFY_WINDOW_HUNG;
+}
+
+base::TimeDelta SetNotificationTimeoutForTesting(base::TimeDelta new_timeout) {
+  base::TimeDelta old_timeout =
+      base::TimeDelta::FromMilliseconds(timeout_in_milliseconds);
+  timeout_in_milliseconds = new_timeout.InMilliseconds();
+  return old_timeout;
+}
+
+}  // namespace chrome
diff --git a/atom/browser/chrome_process_finder_win.h b/atom/browser/chrome_process_finder_win.h
new file mode 100644
index 000000000000..a66429de5e74
--- /dev/null
+++ b/atom/browser/chrome_process_finder_win.h
@@ -0,0 +1,39 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_CHROME_PROCESS_FINDER_WIN_H_
+#define CHROME_BROWSER_CHROME_PROCESS_FINDER_WIN_H_
+
+#include <windows.h>
+
+#include "base/time/time.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace chrome {
+
+enum NotifyChromeResult {
+  NOTIFY_SUCCESS,
+  NOTIFY_FAILED,
+  NOTIFY_WINDOW_HUNG,
+};
+
+// Finds an already running Chrome window if it exists.
+HWND FindRunningChromeWindow(const base::FilePath& user_data_dir);
+
+// Attempts to send the current command line to an already running instance of
+// Chrome via a WM_COPYDATA message.
+// Returns true if a running Chrome is found and successfully notified.
+// |fast_start| is true when this is being called on the window fast start path.
+NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window,
+                                                bool fast_start);
+
+// Changes the notification timeout to |new_timeout|, returns the old timeout.
+base::TimeDelta SetNotificationTimeoutForTesting(base::TimeDelta new_timeout);
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_CHROME_PROCESS_FINDER_WIN_H_