| // Copyright (c) 2012 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 "remoting/host/linux/x11_util.h" |
| |
| #include "base/bind.h" |
| #include "ui/gfx/x/x11.h" |
| |
| namespace remoting { |
| |
| static ScopedXErrorHandler* g_handler = nullptr; |
| |
| ScopedXErrorHandler::ScopedXErrorHandler(const Handler& handler): |
| handler_(handler), |
| ok_(true) { |
| // This is a non-exhaustive check for incorrect usage. It doesn't handle the |
| // case where a mix of ScopedXErrorHandler and raw XSetErrorHandler calls are |
| // used, and it disallows nested ScopedXErrorHandlers on the same thread, |
| // despite these being perfectly safe. |
| DCHECK(g_handler == nullptr); |
| g_handler = this; |
| previous_handler_ = XSetErrorHandler(HandleXErrors); |
| } |
| |
| ScopedXErrorHandler::~ScopedXErrorHandler() { |
| g_handler = nullptr; |
| XSetErrorHandler(previous_handler_); |
| } |
| |
| namespace { |
| void IgnoreXErrors(Display* display, XErrorEvent* error) {} |
| } // namespace |
| |
| // Static |
| ScopedXErrorHandler::Handler ScopedXErrorHandler::Ignore() { |
| return base::Bind(IgnoreXErrors); |
| } |
| |
| int ScopedXErrorHandler::HandleXErrors(Display* display, XErrorEvent* error) { |
| DCHECK(g_handler != nullptr); |
| g_handler->ok_ = false; |
| g_handler->handler_.Run(display, error); |
| return 0; |
| } |
| |
| |
| ScopedXGrabServer::ScopedXGrabServer(Display* display) |
| : display_(display) { |
| XGrabServer(display_); |
| } |
| |
| ScopedXGrabServer::~ScopedXGrabServer() { |
| XUngrabServer(display_); |
| XFlush(display_); |
| } |
| |
| |
| bool IgnoreXServerGrabs(Display* display, bool ignore) { |
| int test_event_base = 0; |
| int test_error_base = 0; |
| int major = 0; |
| int minor = 0; |
| if (!XTestQueryExtension(display, &test_event_base, &test_error_base, |
| &major, &minor)) { |
| return false; |
| } |
| |
| XTestGrabControl(display, ignore); |
| return true; |
| } |
| |
| } // namespace remoting |