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Diffstat (limited to 'webkit/tools/test_shell/foreground_helper.h')
-rw-r--r-- | webkit/tools/test_shell/foreground_helper.h | 111 |
1 files changed, 111 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..359428e --- /dev/null +++ b/webkit/tools/test_shell/foreground_helper.h @@ -0,0 +1,111 @@ +// Copyright 2008, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include <atlbase.h> +#include <atlwin.h> + +#include "base/logging.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 CWindowImpl<ForegroundHelper> { + public: +BEGIN_MSG_MAP(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. + + if(NULL == Create(NULL, NULL, NULL, WS_POPUP)) + return AtlHresultFromLastError(); + + static const int hotkey_id = 0x0000baba; + + // Store the target window into our USERDATA for use in our + // HotKey handler. + SetWindowLongPtr(GWLP_USERDATA, reinterpret_cast<ULONG_PTR>(window)); + RegisterHotKey(m_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(m_hWnd, hotkey_id); + DestroyWindow(); + + return S_OK; + } + + // Handle the registered Hotkey being pressed. + LRESULT OnHotKey(UINT /*uMsg*/, WPARAM /*wParam*/, + LPARAM /*lParam*/, BOOL& bHandled) { + HWND window = reinterpret_cast<HWND>(GetWindowLongPtr(GWLP_USERDATA)); + SetForegroundWindow(window); + return 1; + } +}; |