wip: use toplevel protocols

applets/cosmic-app-list/src/config.rs

@@ -0,0 +1,31 @@
+use std::fmt::Debug;
+use std::fs::File;
+use anyhow::anyhow;
+use serde::Deserialize;
+use xdg::BaseDirectories;
+use crate::ID;
+
+#[derive(Debug, Clone, Deserialize)]
+pub enum TopLevelFilter {
+    ActiveWorkspace,
+    ConfiguredOutput,
+}
+
+#[derive(Debug, Clone, Default, Deserialize)]
+pub struct AppListConfig {
+    pub filter_top_levels: Option<TopLevelFilter>,
+}
+
+impl AppListConfig {
+    /// load config with the provided name
+    pub fn load() -> anyhow::Result<AppListConfig> {
+        let file= match BaseDirectories::new().ok().and_then(|dirs| dirs.find_config_file(format!("{ID}/config.ron"))).and_then(|p| File::open(p).ok()) {
+            Some(path) => path,
+            _ => {
+                anyhow::bail!("Failed to load config");
+            }
+        };
+
+        ron::de::from_reader::<_, AppListConfig>(file).map_err(|err| anyhow!("Failed to parse config file: {}",  err))
+    }
+}