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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_MESSAGE_PUMP_X_H | 5 #ifndef BASE_MESSAGE_PUMP_X_H |
6 #define BASE_MESSAGE_PUMP_X_H | 6 #define BASE_MESSAGE_PUMP_X_H |
7 | 7 |
8 #include "base/message_pump.h" | 8 #include "base/message_pump.h" |
9 #include "base/message_pump_glib.h" | 9 #include "base/message_pump_glib.h" |
10 | 10 |
11 #include <bitset> | 11 #include <bitset> |
12 | 12 |
13 #include <glib.h> | 13 #include <glib.h> |
14 #include <gtk/gtk.h> | |
15 | 14 |
16 typedef union _XEvent XEvent; | 15 typedef union _XEvent XEvent; |
17 typedef struct _XDisplay Display; | 16 typedef struct _XDisplay Display; |
18 | 17 |
19 namespace base { | 18 namespace base { |
20 | 19 |
21 // The documentation for this class is in message_pump_glib.h | 20 // The documentation for this class is in message_pump_glib.h |
22 class BASE_EXPORT MessagePumpObserver { | 21 class BASE_EXPORT MessagePumpObserver { |
23 public: | 22 public: |
24 enum EventStatus { | 23 enum EventStatus { |
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75 // NativeWidgetX is enabled. | 74 // NativeWidgetX is enabled. |
76 static void DisableGtkMessagePump(); | 75 static void DisableGtkMessagePump(); |
77 | 76 |
78 // Returns default X Display. | 77 // Returns default X Display. |
79 static Display* GetDefaultXDisplay(); | 78 static Display* GetDefaultXDisplay(); |
80 | 79 |
81 // Returns true if the system supports XINPUT2. | 80 // Returns true if the system supports XINPUT2. |
82 static bool HasXInput2(); | 81 static bool HasXInput2(); |
83 | 82 |
84 private: | 83 private: |
| 84 #if 0 |
85 // Some XEvent's can't be directly read from X event queue and will go | 85 // Some XEvent's can't be directly read from X event queue and will go |
86 // through GDK's dispatching process and may get discarded. This function | 86 // through GDK's dispatching process and may get discarded. This function |
87 // sets up a filter to intercept those XEvent's we are interested in | 87 // sets up a filter to intercept those XEvent's we are interested in |
88 // and dispatches them so that they won't get lost. | 88 // and dispatches them so that they won't get lost. |
89 static GdkFilterReturn GdkEventFilter(GdkXEvent* gxevent, | 89 static GdkFilterReturn GdkEventFilter(GdkXEvent* gxevent, |
90 GdkEvent* gevent, | 90 GdkEvent* gevent, |
91 gpointer data); | 91 gpointer data); |
92 | 92 |
93 static void EventDispatcherX(GdkEvent* event, gpointer data); | 93 static void EventDispatcherX(GdkEvent* event, gpointer data); |
| 94 #endif |
94 | 95 |
95 // Decides whether we are interested in processing this XEvent. | 96 // Decides whether we are interested in processing this XEvent. |
96 bool ShouldCaptureXEvent(XEvent* event); | 97 bool ShouldCaptureXEvent(XEvent* event); |
97 | 98 |
98 // Dispatches the XEvent and returns true if we should exit the current loop | 99 // Dispatches the XEvent and returns true if we should exit the current loop |
99 // of message processing. | 100 // of message processing. |
100 bool ProcessXEvent(XEvent* event); | 101 bool ProcessXEvent(XEvent* event); |
101 | 102 |
102 // Sends the event to the observers. If an observer returns true, then it does | 103 // Sends the event to the observers. If an observer returns true, then it does |
103 // not send the event to any other observers and returns true. Returns false | 104 // not send the event to any other observers and returns true. Returns false |
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116 GSource* gdksource_; | 117 GSource* gdksource_; |
117 | 118 |
118 // The default GDK event dispatcher. This is stored so that it can be restored | 119 // The default GDK event dispatcher. This is stored so that it can be restored |
119 // when necessary during nested event dispatching. | 120 // when necessary during nested event dispatching. |
120 gboolean (*gdkdispatcher_)(GSource*, GSourceFunc, void*); | 121 gboolean (*gdkdispatcher_)(GSource*, GSourceFunc, void*); |
121 | 122 |
122 // Indicates whether a GDK event was injected by chrome (when |true|) or if it | 123 // Indicates whether a GDK event was injected by chrome (when |true|) or if it |
123 // was captured and being processed by GDK (when |false|). | 124 // was captured and being processed by GDK (when |false|). |
124 bool dispatching_event_; | 125 bool dispatching_event_; |
125 | 126 |
| 127 #if 0 |
126 #if ! GTK_CHECK_VERSION(2,18,0) | 128 #if ! GTK_CHECK_VERSION(2,18,0) |
127 // GDK_EVENT_LAST was introduced in GTK+ 2.18.0. For earlier versions, we pick a | 129 // GDK_EVENT_LAST was introduced in GTK+ 2.18.0. For earlier versions, we pick a |
128 // large enough value (the value of GDK_EVENT_LAST in 2.18.0) so that it works | 130 // large enough value (the value of GDK_EVENT_LAST in 2.18.0) so that it works |
129 // for all versions. | 131 // for all versions. |
130 #define GDK_EVENT_LAST 37 | 132 #define GDK_EVENT_LAST 37 |
131 #endif | 133 #endif |
| 134 #endif |
132 | 135 |
133 // Ideally we would #include X.h for LASTEvent, but it brings in a lot of stupid | 136 // Ideally we would #include X.h for LASTEvent, but it brings in a lot of stupid |
134 // stuff (like Time, CurrentTime etc.) that messes up a lot of things. So define | 137 // stuff (like Time, CurrentTime etc.) that messes up a lot of things. So define |
135 // XLASTEvent here to a large enough value so that it works. | 138 // XLASTEvent here to a large enough value so that it works. |
136 #define XLASTEvent 40 | 139 #define XLASTEvent 40 |
137 | 140 |
138 // We do not want to process all the events ourselves. So we use a lookup | 141 // We do not want to process all the events ourselves. So we use a lookup |
139 // table to quickly check if a particular event should be handled by us or if | 142 // table to quickly check if a particular event should be handled by us or if |
140 // it should be passed on to the default GDK handler. | 143 // it should be passed on to the default GDK handler. |
141 std::bitset<XLASTEvent> capture_x_events_; | 144 std::bitset<XLASTEvent> capture_x_events_; |
142 std::bitset<GDK_EVENT_LAST> capture_gdk_events_; | 145 // std::bitset<GDK_EVENT_LAST> capture_gdk_events_; |
143 | 146 |
144 DISALLOW_COPY_AND_ASSIGN(MessagePumpX); | 147 DISALLOW_COPY_AND_ASSIGN(MessagePumpX); |
145 }; | 148 }; |
146 | 149 |
147 typedef MessagePumpX MessagePumpForUI; | 150 typedef MessagePumpX MessagePumpForUI; |
148 | 151 |
149 } // namespace base | 152 } // namespace base |
150 | 153 |
151 #endif // BASE_MESSAGE_PUMP_X_H | 154 #endif // BASE_MESSAGE_PUMP_X_H |
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