Apply some clippy suggestions

src/app.rs

@@ -77,13 +77,17 @@ impl App {
             no_seconds: false,
         });
         match mode {
-            Mode::Clock { no_date, no_seconds, millis } => {
+            Mode::Clock {
+                no_date,
+                no_seconds,
+                millis,
+            } => {
                 self.clock = Some(Clock {
                     size: self.size,
                     style,
-                    show_date: !no_date.to_owned(),
-                    show_millis: millis.to_owned(),
-                    show_secs: !*no_seconds,
+                    show_date: !no_date,
+                    show_millis: *millis,
+                    show_secs: !no_seconds,
                 });
             }
             Mode::Timer {
@@ -97,7 +101,7 @@ impl App {
                     DurationFormat::HourMinSecDeci
                 };
                 self.timer = Some(Timer::new(
-                    duration.to_owned(),
+                    *duration,
                     self.size,
                     style,
                     format,
@@ -162,7 +166,7 @@ fn parse_duration(s: &str) -> Result<Duration, String> {
         "m" => Ok(Duration::minutes(num)),
         "h" => Ok(Duration::hours(num)),
         "d" => Ok(Duration::days(num)),
-        _ => Err(format!("Invalid duration: {}", s).into()),
+        _ => Err(format!("Invalid duration: {}", s)),
     }
 }
 

src/app/modes/timer.rs

@@ -66,7 +66,7 @@ impl Timer {
     }
 }
 
-fn execute(execute: &Vec<String>) -> String {
+fn execute(execute: &[String]) -> String {
     let mut cmd = Command::new("sh");
     cmd.arg("-c");
     let cmd_str = execute.join(" ");
@@ -90,7 +90,7 @@ impl Widget for &Timer {
     fn render(self, area: Rect, buf: &mut Buffer) {
         let remaining_time = self.remaining_time();
         let time_str = if remaining_time < Duration::zero() {
-            if self.execute.len() > 0 && self.execute_result.borrow().is_none() {
+            if !self.execute.is_empty() && self.execute_result.borrow().is_none() {
                 let result = execute(&self.execute);
                 *self.execute_result.borrow_mut() = Some(result);
             }

src/bricks_text.rs

@@ -30,7 +30,7 @@ impl BricksText {
 
 impl Widget for &BricksText {
     fn render(self, area: tui::layout::Rect, buf: &mut tui::buffer::Buffer) {
-        let mut area = area.clone();
+        let mut area = area;
         for char in self.text.chars() {
             let Point(w, _) = BrickChar::size(self.size);
             let char = BrickChar::from(char);

src/bricks_text/chars.rs

@@ -13,7 +13,7 @@ impl BrickChar {
     const UNIT_SIZE: Point = Point(3 * Self::H_UNIT, 5 * Self::V_UNIT);
 
     pub(crate) fn size(size: u16) -> Point {
-        Self::UNIT_SIZE.clone() * size
+        Self::UNIT_SIZE * size
     }
 
     pub(crate) fn from(char: char) -> BrickChar {
@@ -219,7 +219,7 @@ impl BrickChar {
         for _ in 0..size {
             let mut p = from;
             for _ in (0..len).step_by(max(step.0, step.1).into()) {
-                if !p.in_area(&area) {
+                if !p.in_area(area) {
                     break;
                 }
                 // println!("p = {:?} area = {:?}", p, area);

src/main.rs

@@ -30,7 +30,7 @@ fn run_app<B: Backend>(
 
         let timeout = tick_rate
             .checked_sub(last_tick.elapsed())
-            .unwrap_or(Duration::from_secs(0));
+            .unwrap_or(Duration::ZERO);
         if event::poll(timeout)? {
             if let Event::Key(key) = event::read()? {
                 match key.code {
@@ -61,7 +61,9 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     // create app and run it
     let low_rate = match app.mode {
-        Some(Mode::Clock { millis, no_seconds, .. }) => !millis || no_seconds,
+        Some(Mode::Clock {
+            millis, no_seconds, ..
+        }) => !millis || no_seconds,
         Some(Mode::Timer { no_millis, .. }) => no_millis,
         _ => false,
     };