chain word and better save/load UI

src/state/audio.rs

@@ -77,6 +77,45 @@ impl Default for AudioConfig {
     }
 }
 
+pub struct ListSelectState {
+    pub cursor: usize,
+    pub scroll_offset: usize,
+}
+
+impl ListSelectState {
+    pub fn move_up(&mut self) {
+        if self.cursor > 0 {
+            self.cursor -= 1;
+            if self.cursor < self.scroll_offset {
+                self.scroll_offset = self.cursor;
+            }
+        }
+    }
+
+    pub fn move_down(&mut self, item_count: usize) {
+        if self.cursor + 1 < item_count {
+            self.cursor += 1;
+            if self.cursor >= self.scroll_offset + 5 {
+                self.scroll_offset = self.cursor - 4;
+            }
+        }
+    }
+
+    pub fn page_up(&mut self) {
+        self.cursor = self.cursor.saturating_sub(5);
+        if self.cursor < self.scroll_offset {
+            self.scroll_offset = self.cursor;
+        }
+    }
+
+    pub fn page_down(&mut self, item_count: usize) {
+        self.cursor = (self.cursor + 5).min(item_count.saturating_sub(1));
+        if self.cursor >= self.scroll_offset + 5 {
+            self.scroll_offset = self.cursor.saturating_sub(4);
+        }
+    }
+}
+
 #[derive(Clone, Copy, PartialEq, Eq, Default)]
 pub enum AudioFocus {
     #[default]
@@ -127,6 +166,8 @@ pub struct AudioSettings {
     pub focus: AudioFocus,
     pub output_devices: Vec<AudioDeviceInfo>,
     pub input_devices: Vec<AudioDeviceInfo>,
+    pub output_list: ListSelectState,
+    pub input_list: ListSelectState,
     pub restart_pending: bool,
     pub error: Option<String>,
 }
@@ -138,6 +179,8 @@ impl Default for AudioSettings {
             focus: AudioFocus::default(),
             output_devices: doux::audio::list_output_devices(),
             input_devices: doux::audio::list_input_devices(),
+            output_list: ListSelectState { cursor: 0, scroll_offset: 0 },
+            input_list: ListSelectState { cursor: 0, scroll_offset: 0 },
             restart_pending: false,
             error: None,
         }
@@ -184,25 +227,7 @@ impl AudioSettings {
         };
     }
 
-    pub fn next_output_device(&mut self) {
-        if self.output_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_output_device_index();
-        let next_idx = (current_idx + 1) % self.output_devices.len();
-        self.config.output_device = Some(self.output_devices[next_idx].name.clone());
-    }
-
-    pub fn prev_output_device(&mut self) {
-        if self.output_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_output_device_index();
-        let prev_idx = (current_idx + self.output_devices.len() - 1) % self.output_devices.len();
-        self.config.output_device = Some(self.output_devices[prev_idx].name.clone());
-    }
-
-    fn current_output_device_index(&self) -> usize {
+    pub fn current_output_device_index(&self) -> usize {
         match &self.config.output_device {
             Some(name) => self
                 .output_devices
@@ -217,25 +242,7 @@ impl AudioSettings {
         }
     }
 
-    pub fn next_input_device(&mut self) {
-        if self.input_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_input_device_index();
-        let next_idx = (current_idx + 1) % self.input_devices.len();
-        self.config.input_device = Some(self.input_devices[next_idx].name.clone());
-    }
-
-    pub fn prev_input_device(&mut self) {
-        if self.input_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_input_device_index();
-        let prev_idx = (current_idx + self.input_devices.len() - 1) % self.input_devices.len();
-        self.config.input_device = Some(self.input_devices[prev_idx].name.clone());
-    }
-
-    fn current_input_device_index(&self) -> usize {
+    pub fn current_input_device_index(&self) -> usize {
         match &self.config.input_device {
             Some(name) => self
                 .input_devices
@@ -264,29 +271,6 @@ impl AudioSettings {
         self.config.refresh_rate = self.config.refresh_rate.toggle();
     }
 
-    pub fn current_output_device_name(&self) -> &str {
-        match &self.config.output_device {
-            Some(name) => name,
-            None => self
-                .output_devices
-                .iter()
-                .find(|d| d.is_default)
-                .map(|d| d.name.as_str())
-                .unwrap_or("Default"),
-        }
-    }
-
-    pub fn current_input_device_name(&self) -> &str {
-        match &self.config.input_device {
-            Some(name) => name,
-            None => self
-                .input_devices
-                .iter()
-                .find(|d| d.is_default)
-                .map(|d| d.name.as_str())
-                .unwrap_or("None"),
-        }
-    }
 
     pub fn add_sample_path(&mut self, path: PathBuf) {
         if !self.config.sample_paths.contains(&path) {