1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/events/platform/x11/x11_event_source.h" 6 7 #include <X11/Xlib.h> 8 9 #include "base/message_loop/message_loop.h" 10 #include "base/message_loop/message_pump_libevent.h" 11 12 namespace ui { 13 14 namespace { 15 16 class X11EventSourceLibevent : public X11EventSource, 17 public base::MessagePumpLibevent::Watcher { 18 public: X11EventSourceLibevent(XDisplay * display)19 explicit X11EventSourceLibevent(XDisplay* display) 20 : X11EventSource(display), 21 initialized_(false) { 22 AddEventWatcher(); 23 } 24 ~X11EventSourceLibevent()25 virtual ~X11EventSourceLibevent() { 26 } 27 28 private: AddEventWatcher()29 void AddEventWatcher() { 30 if (initialized_) 31 return; 32 if (!base::MessageLoop::current()) 33 return; 34 35 int fd = ConnectionNumber(display()); 36 base::MessageLoopForUI::current()->WatchFileDescriptor(fd, true, 37 base::MessagePumpLibevent::WATCH_READ, &watcher_controller_, this); 38 initialized_ = true; 39 } 40 41 // PlatformEventSource: OnDispatcherListChanged()42 virtual void OnDispatcherListChanged() OVERRIDE { 43 AddEventWatcher(); 44 } 45 46 // base::MessagePumpLibevent::Watcher: OnFileCanReadWithoutBlocking(int fd)47 virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE { 48 DispatchXEvents(); 49 } 50 OnFileCanWriteWithoutBlocking(int fd)51 virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE { 52 NOTREACHED(); 53 } 54 55 base::MessagePumpLibevent::FileDescriptorWatcher watcher_controller_; 56 bool initialized_; 57 58 DISALLOW_COPY_AND_ASSIGN(X11EventSourceLibevent); 59 }; 60 61 } // namespace 62 CreateDefault()63scoped_ptr<PlatformEventSource> PlatformEventSource::CreateDefault() { 64 return scoped_ptr<PlatformEventSource>( 65 new X11EventSourceLibevent(gfx::GetXDisplay())); 66 } 67 68 } // namespace ui 69