Merge pull request #726 from atom/dbus-checking-menu

Fix detecting global menu bar on Ubuntu

atom.gyp

@@ -561,6 +561,10 @@
               '-rpath \$$ORIGIN',
               # Make native module dynamic loading work.
               '-rdynamic',
+              '<!@(pkg-config --libs-only-L --libs-only-other dbus-1)',
+            ],
+            'libraries': [
+              '<!@(pkg-config --libs-only-l dbus-1)',
             ],
           },
           # Required settings of using breakpad.
@@ -568,8 +572,10 @@
             'vendor/breakpad/src',
           ],
           'cflags': [
+            '<!@(pkg-config --cflags dbus-1)',
             '-Wno-deprecated-register',
             '-Wno-empty-body',
+            '-Wno-reserved-user-defined-literal',
           ],
           'dependencies': [
             'vendor/breakpad/breakpad.gyp:breakpad_client',

atom/browser/native_window_views.cc

@@ -37,6 +37,9 @@
 #include "base/nix/xdg_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/ui/libgtk2ui/unity_service.h"
+#include "dbus/bus.h"
+#include "dbus/object_proxy.h"
+#include "dbus/message.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/x/x11_types.h"
 #include "ui/views/window/native_frame_view.h"
@@ -64,16 +67,38 @@ const int kMenuBarHeight = 25;
 // window role for X11.
 int kWindowsCreated = 0;
 
+// Returns true if the bus name "com.canonical.AppMenu.Registrar" is available.
 bool ShouldUseGlobalMenuBar() {
-  // Some DE would pretend to be Unity but don't have global application menu,
-  // so we can not trust unity::IsRunning().
-  scoped_ptr<base::Environment> env(base::Environment::Create());
-  bool is_unity = unity::IsRunning() &&
-                  base::nix::GetDesktopEnvironment(env.get()) ==
-                      base::nix::DESKTOP_ENVIRONMENT_UNITY;
-  std::string menu_proxy;
-  return is_unity && env->GetVar("UBUNTU_MENUPROXY", &menu_proxy) &&
-         menu_proxy.length() > 1;
+  dbus::Bus::Options options;
+  scoped_refptr<dbus::Bus> bus(new dbus::Bus(options));
+
+  dbus::ObjectProxy* object_proxy =
+      bus->GetObjectProxy(DBUS_SERVICE_DBUS, dbus::ObjectPath(DBUS_PATH_DBUS));
+  dbus::MethodCall method_call(DBUS_INTERFACE_DBUS, "ListNames");
+  scoped_ptr<dbus::Response> response(object_proxy->CallMethodAndBlock(
+      &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
+  if (!response) {
+    bus->ShutdownAndBlock();
+    return false;
+  }
+
+  dbus::MessageReader reader(response.get());
+  dbus::MessageReader array_reader(NULL);
+  if (!reader.PopArray(&array_reader)) {
+    bus->ShutdownAndBlock();
+    return false;
+  }
+  while (array_reader.HasMoreData()) {
+    std::string name;
+    if (array_reader.PopString(&name) &&
+        name == "com.canonical.AppMenu.Registrar") {
+      bus->ShutdownAndBlock();
+      return true;
+    }
+  }
+
+  bus->ShutdownAndBlock();
+  return false;
 }
 #endif
 

docs/development/build-instructions-linux.md

@@ -8,7 +8,7 @@
 On Ubuntu you could install the libraries via:
 
 ```bash
-$ sudo apt-get install build-essential clang libgtk2.0-dev libnotify-dev gcc-multilib g++-multilib
+$ sudo apt-get install build-essential clang libdbus-1-dev libgtk2.0-dev libnotify-dev gcc-multilib g++-multilib
 ```
 
 Latest Node.js could be installed via ppa:

script/cibuild

@@ -10,6 +10,7 @@ from lib.util import execute, rm_rf, scoped_env
 SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
 
 LINUX_DEPS = [
+  'libdbus-1-dev',
   'libgnome-keyring-dev',
   'libgtk2.0-dev',
   'libnotify-dev',

script/lib/config.py

@@ -4,7 +4,7 @@ import platform
 import sys
 
 BASE_URL = 'https://gh-contractor-zcbenz.s3.amazonaws.com/libchromiumcontent'
-LIBCHROMIUMCONTENT_COMMIT = '9f5271d31e0f32eac5a20ef6f543e3f1d43ad645'
+LIBCHROMIUMCONTENT_COMMIT = '56984fa0e4c3c745652510f342c0fb2724d846c2'
 
 ARCH = {
     'cygwin': '32bit',