add layer option, fixes #43

worf/src/lib/config.rs

@@ -89,6 +89,28 @@ pub enum Mode {
     Emoji,
 }
 
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum Layer {
+    Background,
+    Bottom,
+    Top,
+    Overlay
+}
+
+impl FromStr for Layer {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "Background" => Ok(Layer::Background),
+            "Bottom" => Ok(Layer::Bottom),
+            "Top" => Ok(Layer::Top),
+            "Overlay" => Ok(Layer::Overlay),
+            _ => Err(format!("{s} is not a valid layer.")),
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum ArgsError {
     #[error("input is not valid {0}")]
@@ -344,9 +366,13 @@ pub struct Config {
     /// If set to `true` the search field willOption<> be hidden.
     #[clap(long = "hide-search")]
     hide_search: Option<bool>,
+
     #[clap(long = "dynamic-lines")]
     dynamic_lines: Option<bool>, // todo support this
-    layer: Option<String>,     // todo support this
+
+    #[clap(long = "layer")]
+    layer: Option<Layer>,
+
     copy_exec: Option<String>, // todo support this
     #[clap(long = "single_click")]
     single_click: Option<bool>, // todo support this
@@ -579,6 +605,11 @@ impl Config {
     pub fn version(&self) -> bool {
         self.version
     }
+
+    #[must_use]
+    pub fn layer(&self) -> Layer {
+        self.layer.clone().unwrap_or(Layer::Top)
+    }
 }
 
 fn default_false() -> bool {

worf/src/lib/gui.rs

@@ -485,6 +485,17 @@ fn modifiers_from_mask(mask: gdk4::ModifierType) -> HashSet<Modifier> {
     modifiers
 }
 
+impl From<config::Layer> for  gtk4_layer_shell::Layer{
+    fn from(value: config::Layer) -> Self {
+        match value {
+            config::Layer::Background => gtk4_layer_shell::Layer::Background,
+            config::Layer::Bottom => gtk4_layer_shell::Layer::Bottom,
+            config::Layer::Top => gtk4_layer_shell::Layer::Top,
+            config::Layer::Overlay => gtk4_layer_shell::Layer::Overlay,
+        }
+    }
+}
+
 #[derive(Clone, PartialEq, Debug)]
 pub struct KeyBinding {
     pub key: Key,
@@ -674,9 +685,7 @@ fn build_ui<T, P>(
     if !config.normal_window() {
         // Initialize the window as a layer
         ui_elements.window.init_layer_shell();
-        ui_elements
-            .window
-            .set_layer(gtk4_layer_shell::Layer::Overlay);
+        ui_elements.window.set_layer(config.layer().into());
         ui_elements
             .window
             .set_keyboard_mode(KeyboardMode::Exclusive);