feat: mouse scroll and pre-command in custom mode

Cargo.lock

@@ -825,7 +825,7 @@ dependencies = [
 
 [[package]]
 name = "lines"
-version = "0.1.16"
+version = "0.1.17"
 dependencies = [
  "base64",
  "chrono",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lines"
-version = "0.1.16"
+version = "0.1.17"
 edition = "2024"
 authors = ["janvete"]
 description = "TUI for running frequently used commands"

src/app.rs

@@ -40,6 +40,7 @@ pub struct PendingCommand {
 pub enum CustomFocus {
     Lines,
     Input,
+    PreCommand,
 }
 
 #[derive(Debug, Clone)]
@@ -55,6 +56,7 @@ pub struct CustomState {
     pub cursor: usize,
     pub focus: CustomFocus,
     pub command: String,
+    pub pre_command: String,
     pub list_state: ListState,
 }
 
@@ -81,6 +83,7 @@ impl CustomState {
             cursor: 0,
             focus: CustomFocus::Lines,
             command: String::new(),
+            pre_command: String::new(),
             list_state,
         }
     }
@@ -115,12 +118,12 @@ impl CustomState {
             .collect()
     }
 
-    pub fn focus_input(&mut self) {
+    pub fn cycle_focus(&mut self) {
-        self.focus = CustomFocus::Input;
+        self.focus = match self.focus {
-    }
+            CustomFocus::Lines => CustomFocus::Input,
-
+            CustomFocus::Input => CustomFocus::PreCommand,
-    pub fn focus_lines(&mut self) {
+            CustomFocus::PreCommand => CustomFocus::Lines,
-        self.focus = CustomFocus::Lines;
+        };
     }
 
     pub fn toggle_all(&mut self) {

src/custom.rs

@@ -11,15 +11,23 @@ pub fn build_commands(state: &CustomState) -> Vec<String> {
         return Vec::new();
     }
 
+    let pre_command = state.pre_command.trim();
+    let prefix = if pre_command.is_empty() {
+        String::new()
+    } else {
+        format!("{} ", pre_command)
+    };
+
     selected
         .iter()
         .map(|line| {
             let line = line.trim();
-            if command.contains("{}") {
+            let built = if command.contains("{}") {
                 command.replace("{}", line)
             } else {
                 format!("{} \"{}\"", line, command.replace('"', "\\\""))
-            }
+            };
+            format!("{}{}", prefix, built)
         })
         .collect()
 }
@@ -29,7 +37,7 @@ mod tests {
     use super::*;
     use crate::app::{CustomLine, CustomState};
 
-    fn make_state(lines: Vec<&str>, selected: Vec<bool>, command: &str) -> CustomState {
+    fn make_state(lines: Vec<&str>, selected: Vec<bool>, command: &str, pre_command: &str) -> CustomState {
         let mut list_state = ratatui::widgets::ListState::default();
         list_state.select(Some(0));
         CustomState {
@@ -44,6 +52,7 @@ mod tests {
             cursor: 0,
             focus: crate::app::CustomFocus::Lines,
             command: command.to_string(),
+            pre_command: pre_command.to_string(),
             list_state,
         }
     }
@@ -54,6 +63,7 @@ mod tests {
             vec!["ssh root@ip1", "ssh root@ip2", "ssh root@ip3"],
             vec![false, true, true],
             "lsblk",
+            "",
         );
         assert_eq!(
             build_commands(&state),
@@ -63,7 +73,7 @@ mod tests {
 
     #[test]
     fn test_build_commands_placeholder() {
-        let state = make_state(vec!["root@ip1", "root@ip2"], vec![true, true], "ssh {} lsblk");
+        let state = make_state(vec!["root@ip1", "root@ip2"], vec![true, true], "ssh {} lsblk", "");
         assert_eq!(
             build_commands(&state),
             vec!["ssh root@ip1 lsblk", "ssh root@ip2 lsblk"]
@@ -72,7 +82,38 @@ mod tests {
 
     #[test]
     fn test_build_commands_empty_selection() {
-        let state = make_state(vec!["ssh root@ip1"], vec![false], "lsblk");
+        let state = make_state(vec!["ssh root@ip1"], vec![false], "lsblk", "");
         assert!(build_commands(&state).is_empty());
     }
+
+    #[test]
+    fn test_build_commands_pre_command() {
+        let state = make_state(
+            vec!["ssh root@ip1", "ssh root@ip2"],
+            vec![true, true],
+            "ping",
+            "lview",
+        );
+        assert_eq!(
+            build_commands(&state),
+            vec![
+                "lview ssh root@ip1 \"ping\"",
+                "lview ssh root@ip2 \"ping\""
+            ]
+        );
+    }
+
+    #[test]
+    fn test_build_commands_pre_command_placeholder() {
+        let state = make_state(
+            vec!["root@ip1", "root@ip2"],
+            vec![true, true],
+            "ssh {} lsblk",
+            "lview",
+        );
+        assert_eq!(
+            build_commands(&state),
+            vec!["lview ssh root@ip1 lsblk", "lview ssh root@ip2 lsblk"]
+        );
+    }
 }

src/events.rs

@@ -1,21 +1,23 @@
-use crossterm::event::{self, Event, KeyCode, KeyEventKind};
+use crossterm::event::{self, Event, KeyCode, KeyEventKind, MouseEventKind};
 use std::io;
 use std::time::Duration;
 
-use crate::app::{App, CustomFocus, PendingCommand, Screen};
+use crate::app::{App, CustomFocus, CustomState, PendingCommand, Screen};
 use crate::commands::{edit_file, run_section};
 use crate::custom::build_commands;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone)]
 pub enum AppEvent {
     Tick,
     Key(event::KeyEvent),
+    Mouse(event::MouseEvent),
 }
 
 pub fn poll_event(timeout: Duration) -> io::Result<Option<AppEvent>> {
     if event::poll(timeout)? {
         match event::read()? {
             Event::Key(key) => Ok(Some(AppEvent::Key(key))),
+            Event::Mouse(mouse) => Ok(Some(AppEvent::Mouse(mouse))),
             _ => Ok(Some(AppEvent::Tick)),
         }
     } else {
@@ -37,6 +39,49 @@ pub fn handle_event(app: &mut App, event: AppEvent) -> bool {
                 Screen::Search => handle_search_event(app, key),
             }
         }
+        AppEvent::Mouse(mouse) => match mouse.kind {
+            MouseEventKind::ScrollDown => {
+                scroll_down(app);
+                true
+            }
+            MouseEventKind::ScrollUp => {
+                scroll_up(app);
+                true
+            }
+            _ => true,
+        },
+    }
+}
+
+fn scroll_down(app: &mut App) {
+    match app.screen {
+        Screen::Main => app.next(),
+        Screen::Custom => {
+            if let Some(state) = app.custom_state.as_mut() {
+                state.next();
+            }
+        }
+        Screen::Search => {
+            if let Some(state) = app.search_state.as_mut() && !state.results.is_empty() {
+                state.cursor = (state.cursor + 1) % state.results.len();
+            }
+        }
+    }
+}
+
+fn scroll_up(app: &mut App) {
+    match app.screen {
+        Screen::Main => app.previous(),
+        Screen::Custom => {
+            if let Some(state) = app.custom_state.as_mut() {
+                state.previous();
+            }
+        }
+        Screen::Search => {
+            if let Some(state) = app.search_state.as_mut() && !state.results.is_empty() {
+                state.cursor = state.cursor.checked_sub(1).unwrap_or(state.results.len() - 1);
+            }
+        }
     }
 }
 
@@ -115,11 +160,7 @@ fn handle_custom_event(app: &mut App, key: event::KeyEvent) -> bool {
             app.exit_custom();
         }
         KeyCode::Tab => {
-            if state.focus == CustomFocus::Lines {
+            state.cycle_focus();
-                state.focus_input();
-            } else {
-                state.focus_lines();
-            }
         }
         KeyCode::Down => {
             if state.focus == CustomFocus::Lines {
@@ -135,21 +176,21 @@ fn handle_custom_event(app: &mut App, key: event::KeyEvent) -> bool {
             if state.focus == CustomFocus::Lines {
                 state.toggle();
             } else {
-                state.command.push(' ');
+                push_to_active_input(state, ' ');
             }
         }
         KeyCode::Char('a') => {
             if state.focus == CustomFocus::Lines {
                 state.toggle_all();
             } else {
-                state.command.push('a');
+                push_to_active_input(state, 'a');
             }
         }
         KeyCode::Backspace => {
-            state.command.pop();
+            pop_from_active_input(state);
         }
         KeyCode::Enter => {
-            if state.focus == CustomFocus::Input {
+            if state.focus == CustomFocus::Input || state.focus == CustomFocus::PreCommand {
                 let commands = build_commands(state);
                 if !commands.is_empty()
                     && let (Some(file), Some(group)) = (app.current_file(), app.current_group())
@@ -163,17 +204,41 @@ fn handle_custom_event(app: &mut App, key: event::KeyEvent) -> bool {
                     return false;
                 }
             } else {
-                state.focus_input();
+                state.focus = CustomFocus::Input;
             }
         }
         KeyCode::Char(c) => {
-            state.command.push(c);
+            if state.focus == CustomFocus::Lines {
+                state.command.push(c);
+            } else {
+                push_to_active_input(state, c);
+            }
         }
         _ => {}
     }
     true
 }
 
+fn push_to_active_input(state: &mut CustomState, c: char) {
+    match state.focus {
+        CustomFocus::Input => state.command.push(c),
+        CustomFocus::PreCommand => state.pre_command.push(c),
+        CustomFocus::Lines => {}
+    }
+}
+
+fn pop_from_active_input(state: &mut CustomState) {
+    match state.focus {
+        CustomFocus::Input => {
+            state.command.pop();
+        }
+        CustomFocus::PreCommand => {
+            state.pre_command.pop();
+        }
+        CustomFocus::Lines => {}
+    }
+}
+
 fn handle_search_event(app: &mut App, key: event::KeyEvent) -> bool {
     let Some(state) = app.search_state.as_mut() else {
         app.exit_search();

src/ui.rs

@@ -50,6 +50,7 @@ fn draw_custom(f: &mut Frame, app: &mut App) {
         .constraints([
             Constraint::Min(5),
             Constraint::Length(5),
+            Constraint::Length(5),
             Constraint::Length(1),
         ])
         .split(f.area());
@@ -111,13 +112,27 @@ fn draw_custom(f: &mut Frame, app: &mut App) {
         .wrap(Wrap { trim: true });
     f.render_widget(input, chunks[1]);
 
-    let help = "↑/↓: move | Space: toggle | a: select all | Tab: focus | Enter: run | Esc: back";
+    let pre_command = Paragraph::new(state.pre_command.as_str())
+        .block(
+            Block::default()
+                .title(" Pre-command ")
+                .borders(Borders::ALL)
+                .border_style(if state.focus == CustomFocus::PreCommand {
+                    Style::default().fg(Color::Yellow)
+                } else {
+                    Style::default().fg(Color::DarkGray)
+                }),
+        )
+        .wrap(Wrap { trim: true });
+    f.render_widget(pre_command, chunks[2]);
+
+    let help = "↑/↓: move | Space: toggle | a: select all | Tab: focus | Enter: run | Esc: back | scroll: move";
     let text = match &app.message {
         Some(msg) => Text::from(msg.as_str()),
         None => Text::from(help),
     };
     let paragraph = Paragraph::new(text).style(Style::default().fg(Color::Gray));
-    f.render_widget(paragraph, chunks[2]);
+    f.render_widget(paragraph, chunks[3]);
 }
 
 fn draw_search(f: &mut Frame, app: &mut App) {