Implement Tray Icons

This commit implements the StatusNotifierItem protocol, and enables
swaybar to show tray icons. It also uses `xembedsniproxy` in order to
communicate with xembed applications.
The tray is completely optional, and can be disabled on compile time
with the `enable-tray` option. Or on runtime with the bar config option
`tray_output none`.

Overview of changes:
In swaybar very little is changed outside the tray subfolder except
that all events are now polled in `event_loop.c`, this creates no
functional difference.

Six bar configuration options were added, these are detailed in
sway-bar(5)

The tray subfolder is where all protocol implementation takes place and
is organised as follows:

tray/sni_watcher.c:
	This file contains the StatusNotifierWatcher. It keeps track of
	items and hosts and reports when they come or go.
tray/tray.c
	This file contains the StatusNotifierHost. It keeps track of
	sway's version of the items and represents the tray itself.
tray/sni.c
	This file contains the StatusNotifierItem struct and all
	communication with individual items.
tray/icon.c
	This file implements the icon theme protocol. It allows for
	finding icons by name, rather than by pixmap.
tray/dbus.c
	This file allows for asynchronous DBus communication.

See #986 #343

1 files changed, 4 insertions, 0 deletions

diff --git a/sway/commands.c b/sway/commands.c
index 34218491..f83b5287 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -221,18 +221,22 @@ static struct cmd_handler handlers[] = {
 };
 
 static struct cmd_handler bar_handlers[] = {
+        { "activate_button", bar_cmd_activate_button },
         { "binding_mode_indicator", bar_cmd_binding_mode_indicator },
         { "bindsym", bar_cmd_bindsym },
         { "colors", bar_cmd_colors },
+        { "context_button", bar_cmd_context_button },
         { "font", bar_cmd_font },
         { "height", bar_cmd_height },
         { "hidden_state", bar_cmd_hidden_state },
+        { "icon_theme", bar_cmd_icon_theme },
         { "id", bar_cmd_id },
         { "mode", bar_cmd_mode },
         { "modifier", bar_cmd_modifier },
         { "output", bar_cmd_output },
         { "pango_markup", bar_cmd_pango_markup },
         { "position", bar_cmd_position },
+        { "secondary_button", bar_cmd_secondary_button },
         { "separator_symbol", bar_cmd_separator_symbol },
         { "status_command", bar_cmd_status_command },
         { "strip_workspace_numbers", bar_cmd_strip_workspace_numbers },