Add a message pump for touchui=1

base/message_pump_glib_x.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_GLIB_X_H
+#define BASE_MESSAGE_PUMP_GLIB_X_H
+
+#include "base/message_pump.h"
+#include "base/message_pump_glib.h"
+
+#include <bitset>
+
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <X11/X.h>
+
+namespace base {
+
+class MessagePumpGlibX : public MessagePumpForUI {
+ public:
+  MessagePumpGlibX();
+  virtual ~MessagePumpGlibX();
+
+  // MessagePumpForUI implementation.
+  virtual bool RunOnce(GMainContext* context, bool block);
+
+  // Indicates whether a GDK event was injected by chrome (when |true|) or if it
+  // was captured and being processed by GDK (when |false|).
+  bool IsDispatchingEvent(void) { return dispatching_event_; }
+
+ private:
+  static void EventDispatcherX(GdkEvent* event, gpointer data);
+
+  // Update the lookup table and flag the events that should be captured and
+  // processed so that GDK doesn't get to them.
+  void InitializeEventsToCapture(void);
+
+  // The event source for GDK events.
+  GSource* gdksource_;
+
+  // Indicates whether a GDK event was injected by chrome (when |true|) or if it
+  // was captured and being processed by GDK (when |false|).
+  bool dispatching_event_;
+
+#if ! GTK_CHECK_VERSION(2,18,0)
+// GDK_EVENT_LAST was introduced in GTK+ 2.18.0. For earlier versions, we pick a
+// large enough value (the value of GDK_EVENT_LAST in 2.18.0) so that it works
+// for all versions.
+#define GDK_EVENT_LAST 37
+#endif
+
+  // We do not want to process all the events ourselves. So we use a lookup
+  // table to quickly check if a particular event should be handled by us or if
+  // it should be passed on to the default GDK handler.
+  std::bitset<LASTEvent> capture_x_events_;
+  std::bitset<GDK_EVENT_LAST> capture_gdk_events_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpGlibX);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_GLIB_X_H