Drops the in-tree icon theme parser and lookup logic in favor of
libsfdo-icon, which implements the icon theme spec.
Absolute icon paths are handled in swaybar itself with an access()
probe, since libsfdo intentionally doesn't deal with them. Pixmap
fallback still kicks in if load_image() fails on the absolute path.
KDE's IconThemePath is honored via sfdo_icon_theme_load_from() with
a per-SNI override theme that gets dropped when the property changes.
The min/max size cache per SNI is replaced by re-lookup when the
rendered size changes; libsfdo caches the parsed theme internally
and reads gtk's icon-theme.cache files, so this is cheap.
Theme switching at runtime is preserved via a new
tray_reload_icon_theme() called from parse_bar_config(). The old
code worked here implicitly because all themes were preloaded.
Closes: https://github.com/swaywm/sway/issues/8607
Meson's generated config.h header defines false macros as 0, not
undefined. This means that the header line, which was checking for the
definition existing, not a non-zero value, was incorrect. Now the
swaybar tray can be used with systemd, elogind, or basu.
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
