1 // Copyright (c) 2011 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 BASE_MESSAGE_PUMP_GLIB_X_H 6 #define BASE_MESSAGE_PUMP_GLIB_X_H 7 8 #include "base/message_pump.h" 9 #include "base/message_pump_glib.h" 10 11 #include <bitset> 12 #include <set> 13 14 #include <glib.h> 15 #include <gtk/gtk.h> 16 #include <X11/X.h> 17 18 namespace base { 19 20 class MessagePumpGlibX : public MessagePumpForUI { 21 public: 22 MessagePumpGlibX(); 23 virtual ~MessagePumpGlibX(); 24 25 // Indicates whether a GDK event was injected by chrome (when |true|) or if it 26 // was captured and being processed by GDK (when |false|). IsDispatchingEvent(void)27 bool IsDispatchingEvent(void) { return dispatching_event_; } 28 29 #if defined(HAVE_XINPUT2) 30 // Setup an X Window for XInput2 events. 31 void SetupXInput2ForXWindow(Window xid); 32 #endif 33 34 // Overridden from MessagePumpForUI: 35 virtual bool RunOnce(GMainContext* context, bool block); 36 37 private: 38 static void EventDispatcherX(GdkEvent* event, gpointer data); 39 40 // Update the lookup table and flag the events that should be captured and 41 // processed so that GDK doesn't get to them. 42 void InitializeEventsToCapture(void); 43 44 #if defined(HAVE_XINPUT2) 45 // Initialize X2 input. 46 void InitializeXInput2(void); 47 48 // The opcode used for checking events. 49 int xiopcode_; 50 51 // The list of pointer devices we care about. We maintain this list so that 52 // it is not necessary to query X for the list of devices for each 53 // GdkWindow created. 54 std::set<int> pointer_devices_; 55 #endif 56 57 // The event source for GDK events. 58 GSource* gdksource_; 59 60 // The default GDK event dispatcher. This is stored so that it can be restored 61 // when necessary during nested event dispatching. 62 gboolean (*gdkdispatcher_)(GSource*, GSourceFunc, void*); 63 64 // Indicates whether a GDK event was injected by chrome (when |true|) or if it 65 // was captured and being processed by GDK (when |false|). 66 bool dispatching_event_; 67 68 #if ! GTK_CHECK_VERSION(2,18,0) 69 // GDK_EVENT_LAST was introduced in GTK+ 2.18.0. For earlier versions, we pick a 70 // large enough value (the value of GDK_EVENT_LAST in 2.18.0) so that it works 71 // for all versions. 72 #define GDK_EVENT_LAST 37 73 #endif 74 75 // We do not want to process all the events ourselves. So we use a lookup 76 // table to quickly check if a particular event should be handled by us or if 77 // it should be passed on to the default GDK handler. 78 std::bitset<LASTEvent> capture_x_events_; 79 std::bitset<GDK_EVENT_LAST> capture_gdk_events_; 80 81 DISALLOW_COPY_AND_ASSIGN(MessagePumpGlibX); 82 }; 83 84 } // namespace base 85 86 #endif // BASE_MESSAGE_PUMP_GLIB_X_H 87