15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "remoting/host/linux/x11_util.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace remoting { 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static ScopedXErrorHandler* g_handler = NULL; 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedXErrorHandler::ScopedXErrorHandler(const Handler& handler): 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) handler_(handler), 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ok_(true) { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is a poor-man's check for incorrect usage. It doesn't handle the case 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // where a mix of ScopedXErrorHandler and raw XSetErrorHandler calls are used, 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // and it disallows nested ScopedXErrorHandlers on the same thread, despite 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // these being perfectly safe. 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(g_handler == NULL); 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_handler = this; 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) previous_handler_ = XSetErrorHandler(HandleXErrors); 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedXErrorHandler::~ScopedXErrorHandler() { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_handler = NULL; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) XSetErrorHandler(previous_handler_); 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void IgnoreXErrors(Display* display, XErrorEvent* error) {} 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Static 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedXErrorHandler::Handler ScopedXErrorHandler::Ignore() { 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Bind(IgnoreXErrors); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int ScopedXErrorHandler::HandleXErrors(Display* display, XErrorEvent* error) { 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(g_handler != NULL); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_handler->ok_ = false; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_handler->handler_.Run(display, error); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedXGrabServer::ScopedXGrabServer(Display* display) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : display_(display) { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) XGrabServer(display_); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedXGrabServer::~ScopedXGrabServer() { 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) XUngrabServer(display_); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) XFlush(display_); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace remoting 58