| // Copyright 2010-2014, 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 "gui/base/singleton_window_helper.h" |
| |
| #ifdef OS_WIN |
| #include <windows.h> |
| #else |
| #include <unistd.h> // for getpid() |
| #endif |
| |
| #ifdef OS_WIN |
| #include <memory> // for std::unique_ptr |
| #endif // OS_WIN |
| |
| #include "base/file_stream.h" |
| #include "base/logging.h" |
| #include "base/mutex.h" |
| #include "base/process_mutex.h" |
| #include "base/scoped_handle.h" |
| #include "base/util.h" |
| #include "gui/base/win_util.h" |
| #include "ipc/window_info.pb.h" |
| |
| #ifdef OS_WIN |
| using std::unique_ptr; |
| #endif // OS_WIN |
| |
| namespace mozc { |
| namespace gui { |
| namespace { |
| bool ReadWindowInfo(const string &lock_name, |
| ipc::WindowInfo *window_info) { |
| #ifdef OS_WIN |
| wstring wfilename; |
| mozc::Util::UTF8ToWide(lock_name.c_str(), &wfilename); |
| { |
| mozc::ScopedHandle handle( |
| ::CreateFileW(wfilename.c_str(), |
| GENERIC_READ, |
| FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, |
| NULL, OPEN_EXISTING, 0, NULL)); |
| if (NULL == handle.get()) { |
| LOG(ERROR) << "cannot open: " << lock_name << " " << ::GetLastError(); |
| return false; |
| } |
| |
| const DWORD size = ::GetFileSize(handle.get(), NULL); |
| if (-1 == static_cast<int>(size)) { |
| LOG(ERROR) << "GetFileSize failed:" << ::GetLastError(); |
| return false; |
| } |
| |
| const DWORD kMaxFileSize = 2096; |
| if (size == 0 || size >= kMaxFileSize) { |
| LOG(ERROR) << "Invalid file size: " << kMaxFileSize; |
| return false; |
| } |
| |
| unique_ptr<char[]> buf(new char[size]); |
| |
| DWORD read_size = 0; |
| if (!::ReadFile(handle.get(), buf.get(), |
| size, &read_size, NULL)) { |
| LOG(ERROR) << "ReadFile failed: " << ::GetLastError(); |
| return false; |
| } |
| |
| if (read_size != size) { |
| LOG(ERROR) << "read_size != size"; |
| return false; |
| } |
| |
| if (!window_info->ParseFromArray(buf.get(), static_cast<int>(size))) { |
| LOG(ERROR) << "ParseFromArra failed"; |
| return false; |
| } |
| } |
| #else |
| InputFileStream is(lock_name.c_str(), ios::binary|ios::in); |
| if (!is) { |
| LOG(ERROR) << "cannot open: " << lock_name; |
| return false; |
| } |
| |
| if (!window_info->ParseFromIstream(&is)) { |
| LOG(ERROR) << "ParseFromStream failed"; |
| return false; |
| } |
| #endif |
| return true; |
| } |
| } // namespace |
| |
| SingletonWindowHelper::SingletonWindowHelper(const string &name) { |
| mutex_.reset(new mozc::ProcessMutex(name.c_str())); |
| } |
| |
| SingletonWindowHelper::~SingletonWindowHelper() {} |
| |
| bool SingletonWindowHelper::FindPreviousWindow() { |
| ipc::WindowInfo window_info; |
| #ifdef OS_WIN |
| window_info.set_process_id(static_cast<uint32>(::GetCurrentProcessId())); |
| #else |
| window_info.set_process_id(static_cast<uint32>(getpid())); |
| #endif |
| |
| string window_info_str; |
| if (!window_info.SerializeToString(&window_info_str)) { |
| LOG(ERROR) << "SerializeToString failed"; |
| return false; |
| } |
| |
| if (!mutex_->LockAndWrite(window_info_str)) { |
| LOG(ERROR) << "config_dialog is already running"; |
| return true; |
| } |
| return false; |
| } |
| |
| // Windows |
| // Activate window using process_id |
| // Others |
| // Not implemented. |
| bool SingletonWindowHelper::ActivatePreviousWindow() { |
| ipc::WindowInfo window_info; |
| if (!ReadWindowInfo(mutex_->lock_filename(), &window_info)) { |
| LOG(ERROR) << "ReadWindowInfo failed"; |
| return false; |
| } |
| #ifdef OS_WIN |
| WinUtil::ActivateWindow(window_info.process_id()); |
| return true; |
| #else |
| // not implemented |
| return false; |
| #endif |
| } |
| |
| } // namespace gui |
| } // namespace mozc |