[network-manager-applet] Support building against Ayatana AppIndicator.

[Thomas Haller <thaller src gnome org>]

commit bfd4f4cc7b14a6312c861a427bd4bf60bc405901
Author: Mike Gabriel <mike gabriel das-netzwerkteam de>
Date:   Tue Apr 17 16:51:13 2018 +0200

    Support building against Ayatana AppIndicator.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=795333

 config.h.meson    |    3 +++
 configure.ac      |   37 +++++++++++++++++++++++++++++++++----
 meson.build       |   33 +++++++++++++++++++++++++++++++--
 meson_options.txt |    2 +-
 src/applet.h      |    6 +++++-
 src/meson.build   |    2 +-
 6 files changed, 74 insertions(+), 9 deletions(-)
---
diff --git a/config.h.meson b/config.h.meson
index 5befcc9..8e56634 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -41,6 +41,9 @@
 /* Enable using libappindicator */
 #mesondefine WITH_APPINDICATOR
 
+/* Use Ayatana AppIndicator, rathern than Ubuntu's AppIndicator */
+#mesondefine USE_AYATANA_INDICATORS
+
 /* Define if Gcr is available */
 #mesondefine WITH_GCR
 
diff --git a/configure.ac b/configure.ac
index ab4acb7..1643448 100644
--- a/configure.ac
+++ b/configure.ac
@@ -131,11 +131,40 @@ PKG_CHECK_MODULES(NOTIFY, [libnotify >= 0.4.3])
 PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.10)
 GTK_CFLAGS="$GTK_CFLAGS -DGDK_VERSION_MIN_REQUIRED=GDK_VERSION_3_4 -DGTK_VERSION_MAX_ALLOWED=GTK_VERSION_3_4"
 
-AC_ARG_WITH([appindicator], AS_HELP_STRING([--with-appindicator|--without-appindicator], [Build with 
libappindicator support instead of xembed systray support.]))
-if test "$with_appindicator" == "yes"; then
-       PKG_CHECK_MODULES(APPINDICATOR, appindicator3-0.1)
+AC_ARG_WITH([appindicator], AS_HELP_STRING([--with-appindicator|--without-appindicator], [Build with 
lib(ayatana-)appindicator support instead of xembed systray support.]))
+
+if (test "x$with_appindicator" = "xyes"); then
+
+       AC_ARG_VAR([APPINDICATOR_VARIANT], [Set to "auto" (default), "ubuntu" (for libappindicator) or 
"ayatana" (for libayatana-appindicator)])
+
+       if (test "x${APPINDICATOR_VARIANT}" = "x"); then
+               APPINDICATOR_VARIANT=auto
+       fi
+
+       if (test "x${APPINDICATOR_VARIANT}" = "xauto"); then
+               PKG_CHECK_EXISTS(appindicator3-0.1,
+                       [APPINDICATOR_VARIANT=ubuntu])
+               PKG_CHECK_EXISTS(ayatana-appindicator3-0.1,
+                       [APPINDICATOR_VARIANT=ayatana])
+       fi
+
+       if (test "x${APPINDICATOR_VARIANT}" = "xauto"); then
+               AC_MSG_ERROR([Neither Ubuntu's AppIndicator nor Ayatana AppIndicator found.])
+       fi
+
+       if (test "x${APPINDICATOR_VARIANT}" != "xubuntu" -a "x${APPINDICATOR_VARIANT}" != "xayatana"); then
+               AC_MSG_ERROR([Options allowed for APPINDICATOR_VARIANT=<str> are: auto, ubuntu, ayatana.])
+       fi
+
+       if (test "x${APPINDICATOR_VARIANT}" = "xayatana"); then
+               PKG_CHECK_MODULES(APPINDICATOR, ayatana-appindicator3-0.1)
+               AC_DEFINE([WITH_APPINDICATOR], 1, [Enable AppIndicator support and use Ayatana AppIndicator])
+               AC_DEFINE([USE_AYATANA_INDICATORS], 1, [Explicitly enforce Ayatana AppIndicator])
+       elif (test "x${APPINDICATOR_VARIANT}" = "xubuntu"); then
+               PKG_CHECK_MODULES(APPINDICATOR, appindicator3-0.1)
+               AC_DEFINE([WITH_APPINDICATOR], 1, [Enable AppIndicator support and use Ubuntu AppIndicator])
+       fi
        PKG_CHECK_MODULES(DBUSMENU, dbusmenu-gtk3-0.4 >= 16.04.0)
-       AC_DEFINE([WITH_APPINDICATOR], 1, [Enable using libappindicator])
 fi
 
 AM_CONDITIONAL(HAVE_GBT, test x"$have_gbt" = "xyes")
diff --git a/meson.build b/meson.build
index 1995d05..0fdf59f 100644
--- a/meson.build
+++ b/meson.build
@@ -201,11 +201,40 @@ if enable_libnm_gtk
 endif
 
 enable_appindicator = get_option('appindicator')
-if enable_appindicator
+if enable_appindicator == 'auto'
+
+  # prefer building against Ayatana AppIndicator
+
+  appindicator_dep = dependency('ayatana-appindicator3-0.1', required: false)
+  if appindicator_dep.found()
+    enable_appindicator = 'ayatana'
+  else
+
+    # fall back to Ubuntu's AppIndicator if needed
+
+    appindicator_dep = dependency('appindicator3-0.1',required: false)
+    if appindicator_dep.found()
+      enable_appindicator = 'ubuntu'
+    endif
+  endif
+
+  # bail out, if 'yes' was given, but not AppIndicator shared lib is available
+  assert(appindicator_dep.found(), 'Neither Ubuntu\'s AppIndicator nor Ayatana AppIndicator found.')
+
+endif
+
+if enable_appindicator == 'ubuntu'
   appindicator_dep = dependency('appindicator3-0.1')
   dbusmenu_dep = dependency('dbusmenu-gtk3-0.4', version: '>= 16.04.0')
+  config_h.set('WITH_APPINDICATOR', true)
+elif enable_appindicator == 'ayatana'
+  config_h.set('USE_AYATANA_INDICATORS', true)
+  appindicator_dep = dependency('ayatana-appindicator3-0.1')
+  dbusmenu_dep = dependency('dbusmenu-gtk3-0.4', version: '>= 16.04.0')
+  config_h.set('WITH_APPINDICATOR', true)
+else
+  error('Options allowed for -Dappindicator=<str> are: auto, ubuntu, ayatana.')
 endif
-config_h.set('WITH_APPINDICATOR', enable_appindicator)
 
 # ModemManager1 with libmm-glib for WWAN support
 enable_wwan = get_option('wwan')
diff --git a/meson_options.txt b/meson_options.txt
index 666dfe3..86b825c 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,5 +1,5 @@
 option('libnm_gtk', type: 'boolean', value: true, description: 'build legacy library libnm-gtk which depends 
on libnm-glib/libnm-util/dbus-glib')
-option('appindicator', type: 'boolean', value: false, description: 'Build with libappindicator support 
instead of xembed systray support.')
+option('appindicator', type: 'string', value: 'no', description: 'Build with lib(ayatana-)appindicator 
support instead of xembed systray support (auto|ubuntu|ayatana).')
 option('wwan', type: 'boolean', value: true, description: 'Enable WWAN support.')
 option('selinux', type: 'boolean', value: true, description: 'Enable support for adjusting SELinux labels in 
configuration editor.')
 option('team', type: 'boolean', value: true, description: 'Enable team configuration editor.')
diff --git a/src/applet.h b/src/applet.h
index 5392a3e..64ae15a 100644
--- a/src/applet.h
+++ b/src/applet.h
@@ -32,7 +32,11 @@
 #include <libnotify/notify.h>
 
 #ifdef WITH_APPINDICATOR
-#include <libappindicator/app-indicator.h>
+# ifdef USE_AYATANA_INDICATORS
+#  include <libayatana-appindicator/app-indicator.h>
+# else
+#  include <libappindicator/app-indicator.h>
+# endif
 #endif
 
 #include <NetworkManager.h>
diff --git a/src/meson.build b/src/meson.build
index c5638bb..c96f9d0 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -93,7 +93,7 @@ if have_version_script
   ldflags += '-Wl,--version-script,@0@'.format(linker_script_ver)
 endif
 
-if enable_appindicator
+if enable_appindicator == 'ayatana' or enable_appindicator == 'ubuntu'
   deps += [
     appindicator_dep,
     dbusmenu_dep