Fix clippy lints

src/backend/crossterm.rs

@@ -8,16 +8,14 @@ use crate::vec::Vec2;
 use crate::{backend, theme};
 use crossterm::{
     cursor, execute, input, queue, terminal, AlternateScreen, AsyncReader,
-    Attribute, Clear, ClearType, Color, Colored, Command, Goto, Hide,
-    InputEvent as CInputEvent, KeyEvent as CKeyEvent,
-    MouseButton as CMouseButton, MouseEvent as CMouseEvent, Output, RawScreen,
-    SetAttr, SetBg, SetFg, Show, Terminal, TerminalCursor,
+    Attribute, Clear, ClearType, Color, Goto, InputEvent as CInputEvent,
+    KeyEvent as CKeyEvent, MouseButton as CMouseButton,
+    MouseEvent as CMouseEvent, SetAttr, SetBg, SetFg, Show, Terminal,
 };
 
 use crate::event::{Event, Key, MouseButton, MouseEvent};
-use core::borrow::BorrowMut;
 use std::cell::{Cell, RefCell};
-use std::io::{self, BufWriter, Stdout, StdoutLock, Write};
+use std::io::{self, BufWriter, Stdout, Write};
 
 /// Backend using crossterm
 pub struct Backend {
@@ -27,7 +25,6 @@ pub struct Backend {
     async_reader: AsyncReader,
     _alternate_screen: AlternateScreen,
     stdout: RefCell<BufWriter<Stdout>>,
-    cursor: TerminalCursor,
     terminal: Terminal,
 }
 
@@ -52,17 +49,18 @@ impl Backend {
             _alternate_screen,
             stdout: RefCell::new(BufWriter::new(io::stdout())),
             terminal: terminal(),
-            cursor: cursor(),
         }))
     }
 
     fn apply_colors(&self, colors: theme::ColorPair) {
         with_color(colors.front, |c| {
             queue!(self.stdout.borrow_mut(), SetFg(*c))
-        });
+        })
+        .unwrap();
         with_color(colors.back, |c| {
             queue!(self.stdout.borrow_mut(), SetBg(*c))
-        });
+        })
+        .unwrap();
     }
 
     fn write<T>(&self, content: T)
@@ -74,7 +72,7 @@ impl Backend {
     }
 
     fn set_attr(&self, attr: Attribute) {
-        queue!(self.stdout.borrow_mut(), SetAttr(attr));
+        queue!(self.stdout.borrow_mut(), SetAttr(attr)).unwrap();
     }
 
     fn map_key(&mut self, event: CInputEvent) -> Event {
@@ -183,7 +181,8 @@ impl backend::Backend for Backend {
             SetFg(Color::Reset),
             SetAttr(Attribute::Reset),
             Show
-        );
+        )
+        .unwrap();
         input().disable_mouse_mode().unwrap();
     }
 

src/backend/puppet/mod.rs

@@ -8,7 +8,7 @@ use crate::backend::puppet::observed::ObservedStyle;
 use crate::event::Event;
 use crate::theme;
 use crate::vec::Vec2;
-use std::cell::RefCell;
+use std::cell::{Cell, RefCell};
 use std::rc::Rc;
 use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
@@ -25,7 +25,7 @@ pub struct Backend {
     inner_receiver: Receiver<Option<Event>>,
     prev_frame: RefCell<Option<ObservedScreen>>,
     current_frame: RefCell<ObservedScreen>,
-    size: RefCell<Vec2>,
+    size: Cell<Vec2>,
     current_style: RefCell<Rc<ObservedStyle>>,
     screen_channel: (Sender<ObservedScreen>, Receiver<ObservedScreen>),
 }
@@ -44,7 +44,7 @@ impl Backend {
             inner_receiver,
             prev_frame: RefCell::new(None),
             current_frame: RefCell::new(ObservedScreen::new(size)),
-            size: RefCell::new(size),
+            size: Cell::new(size),
             current_style: RefCell::new(Rc::new(
                 DEFAULT_OBSERVED_STYLE.clone(),
             )),
@@ -87,7 +87,7 @@ impl backend::Backend for Backend {
     fn finish(&mut self) {}
 
     fn refresh(&mut self) {
-        let size = self.size.get_mut().clone();
+        let size = self.size.get();
         let current_frame =
             self.current_frame.replace(ObservedScreen::new(size));
         self.prev_frame.replace(Some(current_frame.clone()));
@@ -99,7 +99,7 @@ impl backend::Backend for Backend {
     }
 
     fn screen_size(&self) -> Vec2 {
-        self.size.borrow().clone()
+        self.size.get()
     }
 
     fn print_at(&self, pos: Vec2, text: &str) {

src/backend/puppet/observed.rs

@@ -31,24 +31,24 @@ pub enum GraphemePart {
 impl GraphemePart {
     /// Returns true iff GraphemePart is Continuation
     pub fn is_continuation(&self) -> bool {
-        match self {
-            &GraphemePart::Continuation => true,
+        match *self {
+            GraphemePart::Continuation => true,
             _ => false,
         }
     }
 
     /// Returns Some(String) if GraphemePart is Begin(String), else None.
     pub fn as_option(&self) -> Option<&String> {
-        match self {
-            &GraphemePart::Begin(ref string) => Some(string),
-            &GraphemePart::Continuation => None,
+        match *self {
+            GraphemePart::Begin(ref string) => Some(string),
+            GraphemePart::Continuation => None,
         }
     }
 
     /// Returns String if GraphemePart is Begin(String), panics otherwise.
     pub fn unwrap(&self) -> String {
-        match self {
-            &GraphemePart::Begin(ref s) => s.clone(),
+        match *self {
+            GraphemePart::Begin(ref s) => s.clone(),
             _ => panic!("unwrapping GraphemePart::Continuation"),
         }
     }
@@ -199,8 +199,7 @@ impl ObservedScreen {
                 loop {
                     let pattern_symbol = pattern
                         .graphemes(true)
-                        .skip(pattern_cursor)
-                        .next()
+                        .nth(pattern_cursor)
                         .unwrap_or_else(|| {
                             panic!(
                                 "Found no char at cursor {} in {}",
@@ -277,10 +276,11 @@ pub trait ObservedPieceInterface {
             for x in self.min().x..self.max().x {
                 match &self.parent()[Vec2::new(x, y)] {
                     None => s.push(' '),
-                    Some(cell) => match &cell.letter {
-                        GraphemePart::Begin(lex) => s.push_str(&lex),
-                        _ => {}
-                    },
+                    Some(cell) => {
+                        if let GraphemePart::Begin(lex) = &cell.letter {
+                            s.push_str(&lex);
+                        }
+                    }
                 }
             }
             v.push(s);

src/cursive.rs

@@ -15,7 +15,7 @@ use crate::vec::Vec2;
 use crate::view::{self, Finder, IntoBoxedView, Position, View};
 use crate::views::{self, LayerPosition};
 
-static DEBUG_VIEW_ID: &'static str = "_cursive_debug_view";
+static DEBUG_VIEW_ID: &str = "_cursive_debug_view";
 
 // How long we wait between two empty input polls
 const INPUT_POLL_DELAY_MS: u64 = 30;