mango: show focused window next to tags, fix mmsg lookup, 0.15.x compat

- new focused-window block ({icon} {app_id} - {title}) driven by the
  active_client field of mmsg watch all-monitors (mangowm >= 0.14)
- resolve program icons via freedesktop icon themes/.desktop files
  (new icon module, cairo png feature, cached per app_id)
- new show_focused_window config option (default true)
- run mmsg from PATH instead of hardcoded /usr/bin/mmsg (broken on NixOS)
- handle null active_client fields (no focused client) without failing
  to parse the whole event
- drop stale TODO comment and unused variable in mango provider
- add .justfile run recipe exporting MANGO_INSTANCE_SIGNATURE

1 files changed, 2 insertions, 0 deletions

diff --git a/src/shared_state.rs b/src/shared_state.rs
index 17752d7..c484d24 100644
--- a/src/shared_state.rs
+++ b/src/shared_state.rs
@@ -3,6 +3,7 @@ use std::any::Any;
 use crate::{
     blocks_cache::BlocksCache,
     config::Config,
+    icon::IconCache,
     status_cmd::StatusCmd,
     wm_info_provider::{self, WmInfoProvider},
 };
@@ -14,6 +15,7 @@ pub struct SharedState {
     pub config: Config,
     pub status_cmd: Option<StatusCmd>,
     pub blocks_cache: BlocksCache,
+    pub icon_cache: IconCache,
     pub wm_info_provider: Box<dyn WmInfoProvider>,
 }