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