Make the prompt not null

docs/en/src/messages.md

@@ -281,7 +281,7 @@ YAML: `FollowSymlink`
 
 Set the input prompt temporarily, until the input buffer is reset.
 
-Type: { SetInputPrompt = nullable string }
+Type: { SetInputPrompt = string }
 
 Example:
 

src/app.rs

@@ -154,7 +154,7 @@ pub struct LuaContextLight {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct InputBuffer {
     pub buffer: Option<Input>,
-    pub prompt: Option<String>,
+    pub prompt: String,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -285,7 +285,7 @@ impl App {
 
         let input = InputBuffer {
             buffer: Default::default(),
-            prompt: config.general.prompt.format.clone(),
+            prompt: config.general.prompt.format.clone().unwrap_or_default(),
         };
 
         let mut app = Self {
@@ -808,7 +808,7 @@ impl App {
         }
     }
 
-    fn set_input_prompt(mut self, p: Option<String>) -> Result<Self> {
+    fn set_input_prompt(mut self, p: String) -> Result<Self> {
         self.input.prompt = p;
         Ok(self)
     }
@@ -883,7 +883,13 @@ impl App {
     fn reset_input_buffer(mut self) -> Result<Self> {
         self.input = InputBuffer {
             buffer: Default::default(),
-            prompt: self.config.general.prompt.format.clone(),
+            prompt: self
+                .config
+                .general
+                .prompt
+                .format
+                .to_owned()
+                .unwrap_or_default(),
         };
         Ok(self)
     }

src/msg/in_/external.rs

@@ -242,13 +242,13 @@ pub enum ExternalMsg {
 
     /// Set the input prompt temporarily, until the input buffer is reset.
     ///
-    /// Type: { SetInputPrompt = nullable string }
+    /// Type: { SetInputPrompt = string }
     ///
     /// Example:
     ///
     /// - Lua: `{ SetInputPrompt = "→" }`
     /// - YAML: `SetInputPrompt: →`
-    SetInputPrompt(Option<String>),
+    SetInputPrompt(String),
 
     /// Update the input buffer using cursor based operations.
     ///

src/ui.rs

@@ -817,12 +817,7 @@ fn draw_input_buffer<B: Backend>(
             1
         } else {
             0
-        } + app
+        } + app.input.prompt.chars().count() as u16;
-            .input
-            .prompt
-            .as_ref()
-            .map(|t| t.chars().count() as u16)
-            .unwrap_or(0);
 
         let cursor_offset_right = if config
             .borders
@@ -841,7 +836,7 @@ fn draw_input_buffer<B: Backend>(
 
         let input_buf = Paragraph::new(Spans::from(vec![
             Span::styled(
-                app.input.prompt.to_owned().unwrap_or_default(),
+                app.input.prompt.to_owned(),
                 app.config.general.prompt.style.to_owned().into(),
             ),
             Span::raw(input.value()),