chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc

   1 // Copyright 2013 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/views/frame/global_menu_bar_registrar_x11.h"
   6
   7 #include "base/bind.h"
   8 #include "base/debug/leak_annotations.h"
   9 #include "base/logging.h"
  10 #include "chrome/browser/ui/views/frame/global_menu_bar_x11.h"
  11 #include "content/public/browser/browser_thread.h"
  12
  13 using content::BrowserThread;
  14
  15 namespace {
  16
  17 const char kAppMenuRegistrarName[] = "com.canonical.AppMenu.Registrar";
  18 const char kAppMenuRegistrarPath[] = "/com/canonical/AppMenu/Registrar";
  19
  20 }  // namespace
  21
  22 // static
  23 GlobalMenuBarRegistrarX11* GlobalMenuBarRegistrarX11::GetInstance() {
  24   return base::Singleton<GlobalMenuBarRegistrarX11>::get();
  25 }
  26
  27 void GlobalMenuBarRegistrarX11::OnWindowMapped(unsigned long xid) {
  28   live_xids_.insert(xid);
  29
  30   if (registrar_proxy_)
  31     RegisterXID(xid);
  32 }
  33
  34 void GlobalMenuBarRegistrarX11::OnWindowUnmapped(unsigned long xid) {
  35   if (registrar_proxy_)
  36     UnregisterXID(xid);
  37
  38   live_xids_.erase(xid);
  39 }
  40
  41 GlobalMenuBarRegistrarX11::GlobalMenuBarRegistrarX11()
  42     : registrar_proxy_(nullptr) {
  43   // libdbusmenu uses the gio version of dbus; I tried using the code in dbus/,
  44   // but it looks like that's isn't sharing the bus name with the gio version,
  45   // even when |connection_type| is set to SHARED.
  46   g_dbus_proxy_new_for_bus(
  47       G_BUS_TYPE_SESSION,
  48       static_cast<GDBusProxyFlags>(
  49           G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES |
  50           G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS |
  51           G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START),
  52       nullptr,
  53       kAppMenuRegistrarName,
  54       kAppMenuRegistrarPath,
  55       kAppMenuRegistrarName,
  56       nullptr,  // TODO: Probalby want a real cancelable.
  57       static_cast<GAsyncReadyCallback>(OnProxyCreatedThunk),
  58       this);
  59 }
  60
  61 GlobalMenuBarRegistrarX11::~GlobalMenuBarRegistrarX11() {
  62   if (registrar_proxy_) {
  63     g_signal_handlers_disconnect_by_func(
  64         registrar_proxy_,
  65         reinterpret_cast<void*>(OnNameOwnerChangedThunk),
  66         this);
  67     g_object_unref(registrar_proxy_);
  68   }
  69 }
  70
  71 void GlobalMenuBarRegistrarX11::RegisterXID(unsigned long xid) {
  72   DCHECK(registrar_proxy_);
  73   std::string path = GlobalMenuBarX11::GetPathForWindow(xid);
  74
  75   ANNOTATE_SCOPED_MEMORY_LEAK; // http://crbug.com/314087
  76   // TODO(erg): The mozilla implementation goes to a lot of callback trouble
  77   // just to make sure that they react to make sure there's some sort of
  78   // cancelable object; including making a whole callback just to handle the
  79   // cancelable.
  80   //
  81   // I don't see any reason why we should care if "RegisterWindow" completes or
  82   // not.
  83   g_dbus_proxy_call(registrar_proxy_,
  84                     "RegisterWindow",
  85                     g_variant_new("(uo)", xid, path.c_str()),
  86                     G_DBUS_CALL_FLAGS_NONE, -1,
  87                     nullptr,
  88                     nullptr,
  89                     nullptr);
  90 }
  91
  92 void GlobalMenuBarRegistrarX11::UnregisterXID(unsigned long xid) {
  93   DCHECK(registrar_proxy_);
  94   std::string path = GlobalMenuBarX11::GetPathForWindow(xid);
  95
  96   ANNOTATE_SCOPED_MEMORY_LEAK; // http://crbug.com/314087
  97   // TODO(erg): The mozilla implementation goes to a lot of callback trouble
  98   // just to make sure that they react to make sure there's some sort of
  99   // cancelable object; including making a whole callback just to handle the
 100   // cancelable.
 101   //
 102   // I don't see any reason why we should care if "UnregisterWindow" completes
 103   // or not.
 104   g_dbus_proxy_call(registrar_proxy_,
 105                     "UnregisterWindow",
 106                     g_variant_new("(u)", xid),
 107                     G_DBUS_CALL_FLAGS_NONE, -1,
 108                     nullptr,
 109                     nullptr,
 110                     nullptr);
 111 }
 112
 113 void GlobalMenuBarRegistrarX11::OnProxyCreated(GObject* source,
 114                                                GAsyncResult* result) {
 115   GError* error = nullptr;
 116   GDBusProxy* proxy = g_dbus_proxy_new_for_bus_finish(result, &error);
 117   if (error) {
 118     g_error_free(error);
 119     return;
 120   }
 121
 122   // TODO(erg): Mozilla's implementation has a workaround for GDBus
 123   // cancellation here. However, it's marked as fixed. If there's weird
 124   // problems with cancelation, look at how they fixed their issues.
 125
 126   registrar_proxy_ = proxy;
 127
 128   g_signal_connect(registrar_proxy_, "notify::g-name-owner",
 129                    G_CALLBACK(OnNameOwnerChangedThunk), this);
 130
 131   OnNameOwnerChanged(nullptr, nullptr);
 132 }
 133
 134 void GlobalMenuBarRegistrarX11::OnNameOwnerChanged(GObject* /* ignored */,
 135                                                    GParamSpec* /* ignored */) {
 136   // If the name owner changed, we need to reregister all the live xids with
 137   // the system.
 138   for (std::set<unsigned long>::const_iterator it = live_xids_.begin();
 139        it != live_xids_.end(); ++it) {
 140     RegisterXID(*it);
 141   }
 142 }