src/base/message_loop/message_pump_gtk.cc

   1 // Copyright (c) 2012 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 "base/message_loop/message_pump_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8 #include <gdk/gdkx.h>
   9
  10 #include "base/debug/trace_event.h"
  11 #include "base/profiler/scoped_profile.h"
  12
  13 namespace base {
  14
  15 namespace {
  16
  17 ALLOW_UNUSED const char* EventToTypeString(const GdkEvent* event) {
  18   switch (event->type) {
  19     case GDK_NOTHING:           return "GDK_NOTHING";
  20     case GDK_DELETE:            return "GDK_DELETE";
  21     case GDK_DESTROY:           return "GDK_DESTROY";
  22     case GDK_EXPOSE:            return "GDK_EXPOSE";
  23     case GDK_MOTION_NOTIFY:     return "GDK_MOTION_NOTIFY";
  24     case GDK_BUTTON_PRESS:      return "GDK_BUTTON_PRESS";
  25     case GDK_2BUTTON_PRESS:     return "GDK_2BUTTON_PRESS";
  26     case GDK_3BUTTON_PRESS:     return "GDK_3BUTTON_PRESS";
  27     case GDK_BUTTON_RELEASE:    return "GDK_BUTTON_RELEASE";
  28     case GDK_KEY_PRESS:         return "GDK_KEY_PRESS";
  29     case GDK_KEY_RELEASE:       return "GDK_KEY_RELEASE";
  30     case GDK_ENTER_NOTIFY:      return "GDK_ENTER_NOTIFY";
  31     case GDK_LEAVE_NOTIFY:      return "GDK_LEAVE_NOTIFY";
  32     case GDK_FOCUS_CHANGE:      return "GDK_FOCUS_CHANGE";
  33     case GDK_CONFIGURE:         return "GDK_CONFIGURE";
  34     case GDK_MAP:               return "GDK_MAP";
  35     case GDK_UNMAP:             return "GDK_UNMAP";
  36     case GDK_PROPERTY_NOTIFY:   return "GDK_PROPERTY_NOTIFY";
  37     case GDK_SELECTION_CLEAR:   return "GDK_SELECTION_CLEAR";
  38     case GDK_SELECTION_REQUEST: return "GDK_SELECTION_REQUEST";
  39     case GDK_SELECTION_NOTIFY:  return "GDK_SELECTION_NOTIFY";
  40     case GDK_PROXIMITY_IN:      return "GDK_PROXIMITY_IN";
  41     case GDK_PROXIMITY_OUT:     return "GDK_PROXIMITY_OUT";
  42     case GDK_DRAG_ENTER:        return "GDK_DRAG_ENTER";
  43     case GDK_DRAG_LEAVE:        return "GDK_DRAG_LEAVE";
  44     case GDK_DRAG_MOTION:       return "GDK_DRAG_MOTION";
  45     case GDK_DRAG_STATUS:       return "GDK_DRAG_STATUS";
  46     case GDK_DROP_START:        return "GDK_DROP_START";
  47     case GDK_DROP_FINISHED:     return "GDK_DROP_FINISHED";
  48     case GDK_CLIENT_EVENT:      return "GDK_CLIENT_EVENT";
  49     case GDK_VISIBILITY_NOTIFY: return "GDK_VISIBILITY_NOTIFY";
  50     case GDK_NO_EXPOSE:         return "GDK_NO_EXPOSE";
  51     case GDK_SCROLL:            return "GDK_SCROLL";
  52     case GDK_WINDOW_STATE:      return "GDK_WINDOW_STATE";
  53     case GDK_SETTING:           return "GDK_SETTING";
  54     case GDK_OWNER_CHANGE:      return "GDK_OWNER_CHANGE";
  55     case GDK_GRAB_BROKEN:       return "GDK_GRAB_BROKEN";
  56     case GDK_DAMAGE:            return "GDK_DAMAGE";
  57     default:
  58       return "Unknown Gdk Event";
  59   }
  60 }
  61
  62 }  // namespace
  63
  64 MessagePumpGtk::MessagePumpGtk() : MessagePumpGlib() {
  65   gdk_event_handler_set(&EventDispatcher, this, NULL);
  66 }
  67
  68 MessagePumpGtk::~MessagePumpGtk() {
  69   gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event),
  70                         this, NULL);
  71 }
  72
  73 void MessagePumpGtk::DispatchEvents(GdkEvent* event) {
  74   UNSHIPPED_TRACE_EVENT1("toplevel", "MessagePumpGtk::DispatchEvents",
  75                          "type", EventToTypeString(event));
  76
  77   WillProcessEvent(event);
  78   gtk_main_do_event(event);
  79   DidProcessEvent(event);
  80 }
  81
  82 // static
  83 Display* MessagePumpGtk::GetDefaultXDisplay() {
  84   static GdkDisplay* display = gdk_display_get_default();
  85   if (!display) {
  86     // GTK / GDK has not been initialized, which is a decision we wish to
  87     // support, for example for the GPU process.
  88     static Display* xdisplay = XOpenDisplay(NULL);
  89     return xdisplay;
  90   }
  91   return GDK_DISPLAY_XDISPLAY(display);
  92 }
  93
  94 void MessagePumpGtk::AddObserver(MessagePumpGdkObserver* observer) {
  95   observers_.AddObserver(observer);
  96 }
  97
  98 void MessagePumpGtk::RemoveObserver(MessagePumpGdkObserver* observer) {
  99   observers_.RemoveObserver(observer);
 100 }
 101
 102 void MessagePumpGtk::WillProcessEvent(GdkEvent* event) {
 103   FOR_EACH_OBSERVER(MessagePumpGdkObserver,
 104                     observers_,
 105                     WillProcessEvent(event));
 106 }
 107
 108 void MessagePumpGtk::DidProcessEvent(GdkEvent* event) {
 109   FOR_EACH_OBSERVER(MessagePumpGdkObserver,
 110                     observers_,
 111                     DidProcessEvent(event));
 112 }
 113
 114 // static
 115 void MessagePumpGtk::EventDispatcher(GdkEvent* event, gpointer data) {
 116   MessagePumpGtk* message_pump = reinterpret_cast<MessagePumpGtk*>(data);
 117   message_pump->DispatchEvents(event);
 118 }
 119
 120 }  // namespace base