chrome/browser/ui/libgtk2ui/gtk2_signal_registrar.cc

   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 #include "chrome/browser/ui/libgtk2ui/gtk2_signal_registrar.h"
   6
   7 #include <glib-object.h>
   8
   9 #include "base/logging.h"
  10 #include "chrome/browser/ui/libgtk2ui/g_object_destructor_filo.h"
  11
  12 namespace libgtk2ui {
  13
  14 Gtk2SignalRegistrar::Gtk2SignalRegistrar() {
  15 }
  16
  17 Gtk2SignalRegistrar::~Gtk2SignalRegistrar() {
  18   for (HandlerMap::iterator list_iter = handler_lists_.begin();
  19        list_iter != handler_lists_.end(); ++list_iter) {
  20     GObject* object = list_iter->first;
  21     GObjectDestructorFILO::GetInstance()->Disconnect(
  22         object, WeakNotifyThunk, this);
  23
  24     HandlerList& handlers = list_iter->second;
  25     for (HandlerList::iterator ids_iter = handlers.begin();
  26          ids_iter != handlers.end(); ++ids_iter) {
  27       g_signal_handler_disconnect(object, *ids_iter);
  28     }
  29   }
  30 }
  31
  32 glong Gtk2SignalRegistrar::Connect(gpointer instance,
  33                                    const gchar* detailed_signal,
  34                                    GCallback signal_handler,
  35                                    gpointer data) {
  36   return ConnectInternal(instance, detailed_signal, signal_handler, data,
  37                          false);
  38 }
  39
  40 glong Gtk2SignalRegistrar::ConnectAfter(gpointer instance,
  41                                         const gchar* detailed_signal,
  42                                         GCallback signal_handler,
  43                                         gpointer data) {
  44   return ConnectInternal(instance, detailed_signal, signal_handler, data, true);
  45 }
  46
  47 glong Gtk2SignalRegistrar::ConnectInternal(gpointer instance,
  48                                           const gchar* detailed_signal,
  49                                           GCallback signal_handler,
  50                                           gpointer data,
  51                                           bool after) {
  52   GObject* object = G_OBJECT(instance);
  53
  54   HandlerMap::iterator iter = handler_lists_.find(object);
  55   if (iter == handler_lists_.end()) {
  56     GObjectDestructorFILO::GetInstance()->Connect(
  57         object, WeakNotifyThunk, this);
  58     handler_lists_[object] = HandlerList();
  59     iter = handler_lists_.find(object);
  60   }
  61
  62   glong handler_id = after ?
  63       g_signal_connect_after(instance, detailed_signal, signal_handler, data) :
  64       g_signal_connect(instance, detailed_signal, signal_handler, data);
  65   iter->second.push_back(handler_id);
  66
  67   return handler_id;
  68 }
  69
  70 void Gtk2SignalRegistrar::WeakNotify(GObject* where_the_object_was) {
  71   HandlerMap::iterator iter = handler_lists_.find(where_the_object_was);
  72   if (iter == handler_lists_.end()) {
  73     NOTREACHED();
  74     return;
  75   }
  76   // The signal handlers will be disconnected automatically. Just erase the
  77   // handler id list.
  78   handler_lists_.erase(iter);
  79 }
  80
  81 void Gtk2SignalRegistrar::DisconnectAll(gpointer instance) {
  82   GObject* object = G_OBJECT(instance);
  83   HandlerMap::iterator iter = handler_lists_.find(object);
  84   if (iter == handler_lists_.end())
  85     return;
  86
  87   GObjectDestructorFILO::GetInstance()->Disconnect(
  88       object, WeakNotifyThunk, this);
  89   HandlerList& handlers = iter->second;
  90   for (HandlerList::iterator ids_iter = handlers.begin();
  91        ids_iter != handlers.end(); ++ids_iter) {
  92     g_signal_handler_disconnect(object, *ids_iter);
  93   }
  94
  95   handler_lists_.erase(iter);
  96 }
  97
  98 }  // namespace libgtk2ui