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Diffstat (limited to 'webkit/tools/test_shell/foreground_helper.h')
-rw-r--r-- | webkit/tools/test_shell/foreground_helper.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/webkit/tools/test_shell/foreground_helper.h b/webkit/tools/test_shell/foreground_helper.h new file mode 100644 index 0000000..9466183 --- /dev/null +++ b/webkit/tools/test_shell/foreground_helper.h @@ -0,0 +1,93 @@ +// Copyright (c) 2009 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 WEBKIT_TOOLS_TEST_SHELL_FOREGROUND_HELPER_H_ +#define WEBKIT_TOOLS_TEST_SHELL_FOREGROUND_HELPER_H_ + +#include "base/logging.h" +#include "ui/base/win/window_impl.h" + +// Helper class for moving a window to the foreground. +// Windows XP and later will not allow a window which is in the background to +// move to the foreground, unless requested by the current window in the +// foreground. For automated testing, we really want some of our windows +// to be capable of moving to the foreground. +// +// This is probably leveraging a windows bug. +class ForegroundHelper : public ui::WindowImpl { + public: + BEGIN_MSG_MAP_EX(ForegroundHelper) + MESSAGE_HANDLER(WM_HOTKEY, OnHotKey) + END_MSG_MAP() + + // Brings a window into the foreground. + // Can be called from any window, even if the caller is not the + // foreground window. + static HRESULT SetForeground(HWND window) { + DCHECK(::IsWindow(window)); + ForegroundHelper foreground_helper; + CHECK(foreground_helper.ForegroundHotKey(window) == S_OK); + return S_OK; + } + + private: + HRESULT ForegroundHotKey(HWND window) { + // This implementation registers a hot key (F22) and then + // triggers the hot key. When receiving the hot key, we'll + // be in the foreground and allowed to move the target window + // into the foreground too. + + set_window_style(WS_POPUP); + Init(NULL, gfx::Rect()); + + static const int hotkey_id = 0x0000baba; + + // Store the target window into our USERDATA for use in our + // HotKey handler. + SetWindowLongPtr(hwnd(), GWLP_USERDATA, + reinterpret_cast<ULONG_PTR>(window)); + RegisterHotKey(hwnd(), hotkey_id, 0, VK_F22); + + // If the calling thread is not yet a UI thread, call PeekMessage + // to ensure creation of its message queue. + MSG msg = {0}; + PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE); + + // Send the Hotkey. + INPUT hotkey = {0}; + hotkey.type = INPUT_KEYBOARD; + hotkey.ki.wVk = VK_F22; + if (1 != SendInput(1, &hotkey, sizeof(hotkey))) + return E_FAIL; + + // Loop until we get the key. + // TODO: It may be possible to get stuck here if the + // message gets lost? + while (GetMessage(&msg, NULL, 0, 0)) { + TranslateMessage(&msg); + DispatchMessage(&msg); + + if (WM_HOTKEY == msg.message) + break; + } + + UnregisterHotKey(hwnd(), hotkey_id); + DestroyWindow(hwnd()); + + return S_OK; + } + + // Handle the registered Hotkey being pressed. + LRESULT OnHotKey(UINT message, + WPARAM wparam, + LPARAM lparam, + BOOL& handled) { + HWND window = reinterpret_cast<HWND>(GetWindowLongPtr(hwnd(), + GWLP_USERDATA)); + SetForegroundWindow(window); + return 1; + } +}; + +#endif // WEBKIT_TOOLS_TEST_SHELL_FOREGROUND_HELPER_H_ |