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#ifndef UI_EVENTS_PLATFORM_X11_X11_EVENT_SOURCE_H_ 6#define UI_EVENTS_PLATFORM_X11_X11_EVENT_SOURCE_H_ 7 8#include "base/memory/scoped_ptr.h" 9#include "ui/events/events_export.h" 10#include "ui/events/platform/platform_event_source.h" 11#include "ui/gfx/x/x11_types.h" 12 13typedef struct _GPollFD GPollFD; 14typedef struct _GSource GSource; 15typedef union _XEvent XEvent; 16typedef unsigned long XID; 17 18namespace ui { 19 20class HotplugEventHandlerX11; 21 22// A PlatformEventSource implementation for reading events from X11 server and 23// dispatching the events to the appropriate dispatcher. 24class EVENTS_EXPORT X11EventSource : public PlatformEventSource { 25 public: 26 explicit X11EventSource(XDisplay* display); 27 virtual ~X11EventSource(); 28 29 static X11EventSource* GetInstance(); 30 31 // Called by the glib source dispatch function. Processes all (if any) 32 // available X events. 33 void DispatchXEvents(); 34 35 // Blocks on the X11 event queue until we receive notification from the 36 // xserver that |w| has been mapped; StructureNotifyMask events on |w| are 37 // pulled out from the queue and dispatched out of order. 38 // 39 // For those that know X11, this is really a wrapper around XWindowEvent 40 // which still makes sure the preempted event is dispatched instead of 41 // dropped on the floor. This method exists because mapping a window is 42 // asynchronous (and we receive an XEvent when mapped), while there are also 43 // functions which require a mapped window. 44 void BlockUntilWindowMapped(XID window); 45 46 protected: 47 XDisplay* display() { return display_; } 48 49 private: 50 // PlatformEventSource: 51 virtual uint32_t DispatchEvent(XEvent* xevent) OVERRIDE; 52 virtual void StopCurrentEventStream() OVERRIDE; 53 54 // The connection to the X11 server used to receive the events. 55 XDisplay* display_; 56 57 // Keeps track of whether this source should continue to dispatch all the 58 // available events. 59 bool continue_stream_; 60 61 scoped_ptr<HotplugEventHandlerX11> hotplug_event_handler_; 62 63 DISALLOW_COPY_AND_ASSIGN(X11EventSource); 64}; 65 66} // namespace ui 67 68#endif // UI_EVENTS_PLATFORM_X11_X11_EVENT_SOURCE_H_ 69