1 # Copyright 2013 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
5 """Common helper module for working with Chrome's processes and windows."""
15 def GetProcessIDAndPathPairs():
16 """Returns a list of 2-tuples of (process id, process path).
18 This is needed because psutil is not available on Windows slave machines (see:
19 http://crbug.com/257696).
20 TODO(sukolsak): Use psutil.process_iter() once it becomes available.
22 process_id_and_path_pairs = []
23 for process_id in win32process.EnumProcesses():
24 process_handle = ctypes.windll.kernel32.OpenProcess(
25 win32con.PROCESS_QUERY_INFORMATION | win32con.PROCESS_VM_READ, False,
27 if not process_handle:
30 process_path = win32process.GetModuleFileNameEx(process_handle, 0)
31 process_id_and_path_pairs.append((process_id, process_path))
32 except pywintypes.error:
33 # It's normal that some processes are not accessible.
35 return process_id_and_path_pairs
38 def GetProcessIDs(process_path):
39 """Returns a list of IDs of processes whose path is |process_path|.
42 process_path: The path to the process.
45 A list of process IDs.
47 return [pid for (pid, path) in GetProcessIDAndPathPairs() if
51 def GetWindowHandles(process_ids):
52 """Returns a list of handles of windows owned by processes in |process_ids|.
55 process_ids: A list of process IDs.
58 A list of handles of windows owned by processes in |process_ids|.
61 def EnumerateWindowCallback(hwnd, _):
62 _, found_process_id = win32process.GetWindowThreadProcessId(hwnd)
63 if found_process_id in process_ids and win32gui.IsWindowVisible(hwnd):
65 # Enumerate all the top-level windows and call the callback with the hwnd as
66 # the first parameter.
67 win32gui.EnumWindows(EnumerateWindowCallback, None)
71 def WindowExists(process_ids, class_pattern):
72 """Returns whether there exists a window with the specified criteria.
74 This method returns whether there exists a window that is owned by a process
75 in |process_ids| and has a class name that matches |class_pattern|.
78 process_ids: A list of process IDs.
79 class_pattern: The regular expression pattern of the window class name.
82 A boolean indicating whether such window exists.
84 for hwnd in GetWindowHandles(process_ids):
85 if re.match(class_pattern, win32gui.GetClassName(hwnd)):