Fix all clippy warnings in `meli` crate

config_macros.rs

@@ -50,7 +50,9 @@ pub fn override_derive(filenames: &[(&str, &str)]) {
  * along with meli. If not, see <http://www.gnu.org/licenses/>.
  */
 
-//! This module is automatically generated by build.rs.
+#![allow(clippy::derivable_impls)]
+
+//! This module is automatically generated by config_macros.rs.
 use super::*;
 
 "##

src/bin.rs

@@ -42,6 +42,8 @@ extern crate serde_json;
 extern crate smallvec;
 extern crate termion;
 
+use structopt::StructOpt;
+
 #[global_allocator]
 static GLOBAL: System = System;
 
@@ -120,6 +122,7 @@ fn notify(
     Ok(r)
 }
 
+#[cfg(feature = "cli-docs")]
 fn parse_manpage(src: &str) -> Result<ManPages> {
     match src {
         "" | "meli" | "main" => Ok(ManPages::Main),
@@ -132,8 +135,7 @@ fn parse_manpage(src: &str) -> Result<ManPages> {
     }
 }
 
-use structopt::StructOpt;
-
+#[cfg(feature = "cli-docs")]
 #[derive(Copy, Clone, Debug)]
 /// Choose manpage
 enum ManPages {
@@ -193,9 +195,11 @@ enum SubCommand {
 #[derive(Debug, StructOpt)]
 struct ManOpt {
     #[structopt(default_value = "meli", possible_values=&["meli", "conf", "themes"], value_name="PAGE", parse(try_from_str = parse_manpage))]
+    #[cfg(feature = "cli-docs")]
     page: ManPages,
     /// If true, output text in stdout instead of spawning $PAGER.
     #[structopt(long = "no-raw", alias = "no-raw", value_name = "bool")]
+    #[cfg(feature = "cli-docs")]
     no_raw: Option<Option<bool>>,
 }
 
@@ -243,7 +247,7 @@ fn run_app(opt: Opt) -> Result<()> {
         #[cfg(feature = "cli-docs")]
         Some(SubCommand::Man(manopt)) => {
             let ManOpt { page, no_raw } = manopt;
-            const MANPAGES: [&'static [u8]; 3] = [
+            const MANPAGES: [&[u8]; 3] = [
                 include_bytes!(concat!(env!("OUT_DIR"), "/meli.txt.gz")),
                 include_bytes!(concat!(env!("OUT_DIR"), "/meli.conf.txt.gz")),
                 include_bytes!(concat!(env!("OUT_DIR"), "/meli-themes.txt.gz")),
@@ -255,10 +259,9 @@ fn run_app(opt: Opt) -> Result<()> {
                 str::parse::<usize>(unsafe {
                     std::str::from_utf8_unchecked(gz.header().unwrap().comment().unwrap())
                 })
-                .expect(&format!(
-                    "{:?} was not compressed with size comment header",
-                    page
-                )),
+                .unwrap_or_else(|_| {
+                    panic!("{:?} was not compressed with size comment header", page)
+                }),
             );
             gz.read_to_string(&mut v)?;
 
@@ -271,19 +274,18 @@ fn run_app(opt: Opt) -> Result<()> {
                         return Ok(());
                     }
                 }
-            } else {
-                if unsafe { libc::isatty(libc::STDOUT_FILENO) != 1 } {
-                    println!("{}", &v);
-                    return Ok(());
-                }
+            } else if unsafe { libc::isatty(libc::STDOUT_FILENO) != 1 } {
+                println!("{}", &v);
+                return Ok(());
             }
 
             use std::process::{Command, Stdio};
-            let mut handle = Command::new(std::env::var("PAGER").unwrap_or("more".to_string()))
-                .stdin(Stdio::piped())
-                .stdout(Stdio::inherit())
-                .stderr(Stdio::inherit())
-                .spawn()?;
+            let mut handle =
+                Command::new(std::env::var("PAGER").unwrap_or_else(|_| "more".to_string()))
+                    .stdin(Stdio::piped())
+                    .stdout(Stdio::inherit())
+                    .stderr(Stdio::inherit())
+                    .spawn()?;
             handle.stdin.take().unwrap().write_all(v.as_bytes())?;
             handle.wait()?;
 
@@ -314,7 +316,7 @@ fn run_app(opt: Opt) -> Result<()> {
         }
         Some(SubCommand::PrintLoadedThemes) => {
             let s = conf::FileSettings::new()?;
-            print!("{}", s.terminal.themes.to_string());
+            print!("{}", s.terminal.themes);
             return Ok(());
         }
         Some(SubCommand::PrintDefaultTheme) => {

src/command.rs

@@ -116,7 +116,7 @@ impl TokenStream {
             }
             *s = &s[ptr..];
             //println!("\t before s.is_empty() {:?} {:?}", t, s);
-            if s.is_empty() || &*s == &" " {
+            if s.is_empty() || *s == " " {
                 match t.inner() {
                     Literal(lit) => {
                         sugg.insert(format!("{}{}", if s.is_empty() { " " } else { "" }, lit));
@@ -126,7 +126,7 @@ impl TokenStream {
                             //println!("adding empty suggestions for {:?}", t);
                             let mut _s = *s;
                             let mut m = t.matches(&mut _s, sugg);
-                            tokens.extend(m.drain(..));
+                            tokens.append(&mut m);
                         }
                     }
                     Seq(_s) => {}
@@ -167,7 +167,7 @@ impl TokenStream {
                         let mut _s = *s;
                         let mut m = t.matches(&mut _s, sugg);
                         if !m.is_empty() {
-                            tokens.extend(m.drain(..));
+                            tokens.append(&mut m);
                             //println!("_s is empty {}", _s.is_empty());
                             cont = !_s.is_empty();
                             *s = _s;
@@ -262,7 +262,7 @@ define_commands!([
                    desc: "set [seen/unseen], toggles message's Seen flag.",
                    tokens: &[One(Literal("set")), One(Alternatives(&[to_stream!(One(Literal("seen"))), to_stream!(One(Literal("unseen")))]))],
                    parser: (
-                       fn seen_flag<'a>(input: &'a [u8]) -> IResult<&'a [u8], Action> {
+                       fn seen_flag(input: &'_ [u8]) -> IResult<&'_ [u8], Action> {
                            let (input, _) = tag("set")(input.trim())?;
                            let (input, _) = is_a(" ")(input)?;
                            let (input, ret) = alt((map(tag("seen"), |_| Listing(SetSeen)), map(tag("unseen"), |_| Listing(SetUnseen))))(input)?;
@@ -275,7 +275,7 @@ define_commands!([
                    desc: "delete message",
                    tokens: &[One(Literal("delete"))],
                    parser: (
-                       fn delete_message<'a>(input: &'a [u8]) -> IResult<&'a [u8], Action> {
+                       fn delete_message(input: &'_ [u8]) -> IResult<&'_ [u8], Action> {
                            let (input, ret) = map(preceded(tag("delete"), eof), |_| Listing(Delete))(input)?;
                            let (input, _) = eof(input)?;
                            Ok((input, ret))
@@ -536,7 +536,7 @@ define_commands!([
                   desc: "filter EXECUTABLE ARGS",
                   tokens: &[One(Literal("filter")), One(Filepath), ZeroOrMore(QuotedStringValue)],
                   parser:(
-                      fn filter<'a>(input: &'a [u8]) -> IResult<&'a [u8], Action> {
+                      fn filter(input: &'_ [u8]) -> IResult<&'_ [u8], Action> {
                           let (input, _) = tag("filter")(input.trim())?;
                           let (input, _) = is_a(" ")(input)?;
                           let (input, cmd) = map_res(not_line_ending, std::str::from_utf8)(input)?;
@@ -1080,7 +1080,7 @@ pub fn command_completion_suggestions(input: &str) -> Vec<String> {
         }
         if let Some((s, Filepath)) = _m.last() {
             let p = std::path::Path::new(s);
-            sugg.extend(p.complete(true).into_iter().map(|m| m.into()));
+            sugg.extend(p.complete(true).into_iter());
         }
     }
     sugg.into_iter()

src/components/contacts.rs

@@ -29,7 +29,7 @@ pub use self::contact_list::*;
 #[derive(Debug)]
 enum ViewMode {
     ReadOnly,
-    Discard(UIDialog<char>),
+    Discard(Box<UIDialog<char>>),
     Edit,
     //New,
 }
@@ -113,27 +113,21 @@ impl ContactManager {
         self.form = FormWidget::new(("Save".into(), true));
         self.form.add_button(("Cancel(Esc)".into(), false));
         self.form
-            .push(("NAME".into(), self.card.name().to_string().into()));
+            .push(("NAME".into(), self.card.name().to_string()));
         self.form.push((
             "ADDITIONAL NAME".into(),
-            self.card.additionalname().to_string().into(),
-        ));
-        self.form.push((
-            "NAME PREFIX".into(),
-            self.card.name_prefix().to_string().into(),
-        ));
-        self.form.push((
-            "NAME SUFFIX".into(),
-            self.card.name_suffix().to_string().into(),
+            self.card.additionalname().to_string(),
         ));
         self.form
-            .push(("E-MAIL".into(), self.card.email().to_string().into()));
+            .push(("NAME PREFIX".into(), self.card.name_prefix().to_string()));
         self.form
-            .push(("URL".into(), self.card.url().to_string().into()));
+            .push(("NAME SUFFIX".into(), self.card.name_suffix().to_string()));
         self.form
-            .push(("KEY".into(), self.card.key().to_string().into()));
+            .push(("E-MAIL".into(), self.card.email().to_string()));
+        self.form.push(("URL".into(), self.card.url().to_string()));
+        self.form.push(("KEY".into(), self.card.key().to_string()));
         for (k, v) in self.card.extra_properties() {
-            self.form.push((k.to_string().into(), v.to_string().into()));
+            self.form.push((k.to_string().into(), v.to_string()));
         }
     }
 
@@ -168,26 +162,20 @@ impl Component for ContactManager {
             (set_y(upper_left, get_y(upper_left) + 2), bottom_right),
             context,
         );
-        match self.mode {
-            ViewMode::Discard(ref mut selector) => {
-                /* Let user choose whether to quit with/without saving or cancel */
-                selector.draw(grid, area, context);
-            }
-            _ => {}
+        if let ViewMode::Discard(ref mut selector) = self.mode {
+            /* Let user choose whether to quit with/without saving or cancel */
+            selector.draw(grid, area, context);
         }
 
         context.dirty_areas.push_back(area);
     }
 
     fn process_event(&mut self, event: &mut UIEvent, context: &mut Context) -> bool {
-        match event {
-            UIEvent::ConfigReload { old_settings: _ } => {
-                self.theme_default = crate::conf::value(context, "theme_default");
-                self.content = CellBuffer::new_with_context(100, 1, None, context);
-                self.initialized = false;
-                self.set_dirty(true);
-            }
-            _ => {}
+        if let UIEvent::ConfigReload { old_settings: _ } = event {
+            self.theme_default = crate::conf::value(context, "theme_default");
+            self.content = CellBuffer::new_with_context(100, 1, None, context);
+            self.initialized = false;
+            self.set_dirty(true);
         }
         match self.mode {
             ViewMode::Discard(ref mut selector) => {
@@ -209,9 +197,7 @@ impl Component for ContactManager {
                     match self.form.buttons_result() {
                         None => {}
                         Some(true) => {
-                            let fields = std::mem::replace(&mut self.form, FormWidget::default())
-                                .collect()
-                                .unwrap();
+                            let fields = std::mem::take(&mut self.form).collect().unwrap();
                             let fields: HashMap<String, String> = fields
                                 .into_iter()
                                 .map(|(s, v)| {
@@ -290,7 +276,7 @@ impl Component for ContactManager {
 
         let parent_id = self.parent_id;
         /* Play it safe and ask user for confirmation */
-        self.mode = ViewMode::Discard(UIDialog::new(
+        self.mode = ViewMode::Discard(Box::new(UIDialog::new(
             "this contact has unsaved changes",
             vec![
                 ('x', "quit without saving".to_string()),
@@ -305,7 +291,7 @@ impl Component for ContactManager {
                 _ => None,
             })),
             context,
-        ));
+        )));
         self.set_dirty(true);
         false
     }

src/components/contacts/contact_list.rs

@@ -34,7 +34,7 @@ enum ViewMode {
 #[derive(Debug)]
 struct AccountMenuEntry {
     name: String,
-    hash: AccountHash,
+    _hash: AccountHash,
     // Index in the config account vector.
     index: usize,
 }
@@ -82,7 +82,7 @@ impl ContactList {
             .enumerate()
             .map(|(i, (h, a))| AccountMenuEntry {
                 name: a.name().to_string(),
-                hash: *h,
+                _hash: *h,
                 index: i,
             })
             .collect();
@@ -216,7 +216,6 @@ impl ContactList {
                 ((0, 0), (message.len() - 1, 0)),
                 None,
             );
-            return;
         }
     }
 
@@ -241,7 +240,7 @@ impl ContactList {
         self.dirty = false;
         let mut y = get_y(upper_left);
         for a in &self.accounts {
-            self.print_account(grid, (set_y(upper_left, y), bottom_right), &a, context);
+            self.print_account(grid, (set_y(upper_left, y), bottom_right), a, context);
             y += 1;
         }
 
@@ -393,6 +392,7 @@ impl ContactList {
                     }
                 }
                 PageMovement::PageDown(multiplier) => {
+                    #[allow(clippy::comparison_chain)]
                     if self.new_cursor_pos + rows * multiplier < self.length {
                         self.new_cursor_pos += rows * multiplier;
                     } else if self.new_cursor_pos + rows * multiplier > self.length {
@@ -782,7 +782,7 @@ impl Component for ContactList {
                         .push_back(UIEvent::StatusEvent(StatusEvent::BufClear));
                     return true;
                 }
-                UIEvent::Input(Key::Char(c)) if c >= '0' && c <= '9' => {
+                UIEvent::Input(Key::Char(c)) if ('0'..='9').contains(&c) => {
                     self.cmd_buf.push(c);
                     context
                         .replies

src/components/mail/compose.rs

@@ -116,19 +116,11 @@ enum ViewMode {
 
 impl ViewMode {
     fn is_edit(&self) -> bool {
-        if let ViewMode::Edit = self {
-            true
-        } else {
-            false
-        }
+        matches!(self, ViewMode::Edit)
     }
 
     fn is_edit_attachments(&self) -> bool {
-        if let ViewMode::EditAttachments { .. } = self {
-            true
-        } else {
-            false
-        }
+        matches!(self, ViewMode::EditAttachments { .. })
     }
 }
 
@@ -160,7 +152,7 @@ impl Composer {
             form: FormWidget::default(),
             mode: ViewMode::Edit,
             #[cfg(feature = "gpgme")]
-            gpg_state: gpg::GpgComposeState::new(),
+            gpg_state: gpg::GpgComposeState::default(),
             dirty: true,
             has_changes: false,
             embed_area: ((0, 0), (0, 0)),
@@ -249,11 +241,7 @@ impl Composer {
         ret.draft
             .set_header("In-Reply-To", envelope.message_id_display().into());
 
-        if let Some(reply_to) = envelope
-            .other_headers()
-            .get("To")
-            .and_then(|v| v.as_str().try_into().ok())
-        {
+        if let Some(reply_to) = envelope.other_headers().get("To").map(|v| v.as_str()) {
             let to: &str = reply_to;
             let extra_identities = &account.settings.account.extra_identities;
             if let Some(extra) = extra_identities
@@ -288,30 +276,26 @@ impl Composer {
                 .and_then(|v| v.as_str().try_into().ok())
             {
                 to.insert(reply_to);
+            } else if let Some(reply_to) = envelope
+                .other_headers()
+                .get("Reply-To")
+                .and_then(|v| v.as_str().try_into().ok())
+            {
+                to.insert(reply_to);
             } else {
-                if let Some(reply_to) = envelope
-                    .other_headers()
-                    .get("Reply-To")
-                    .and_then(|v| v.as_str().try_into().ok())
-                {
-                    to.insert(reply_to);
-                } else {
-                    to.extend(envelope.from().iter().cloned());
-                }
+                to.extend(envelope.from().iter().cloned());
             }
             to.extend(envelope.to().iter().cloned());
-            if let Some(ours) = TryInto::<Address>::try_into(
+            if let Ok(ours) = TryInto::<Address>::try_into(
                 crate::components::mail::get_display_name(context, coordinates.0).as_str(),
-            )
-            .ok()
-            {
+            ) {
                 to.remove(&ours);
             }
             ret.draft.set_header("To", {
                 let mut ret: String =
                     to.into_iter()
                         .fold(String::new(), |mut s: String, n: Address| {
-                            s.extend(n.to_string().chars());
+                            s.push_str(&n.to_string());
                             s.push_str(", ");
                             s
                         });
@@ -320,14 +304,12 @@ impl Composer {
                 ret
             });
             ret.draft.set_header("Cc", envelope.field_cc_to_string());
+        } else if let Some(reply_to) = envelope.other_headers().get("Mail-Reply-To") {
+            ret.draft.set_header("To", reply_to.to_string());
+        } else if let Some(reply_to) = envelope.other_headers().get("Reply-To") {
+            ret.draft.set_header("To", reply_to.to_string());
         } else {
-            if let Some(reply_to) = envelope.other_headers().get("Mail-Reply-To") {
-                ret.draft.set_header("To", reply_to.to_string());
-            } else if let Some(reply_to) = envelope.other_headers().get("Reply-To") {
-                ret.draft.set_header("To", reply_to.to_string());
-            } else {
-                ret.draft.set_header("To", envelope.field_from_to_string());
-            }
+            ret.draft.set_header("To", envelope.field_from_to_string());
         }
         ret.draft.body = {
             let mut ret = attribution_string(
@@ -481,7 +463,7 @@ To: {}
         let header_values = self.form.values_mut();
         let draft_header_map = self.draft.headers_mut();
         for (k, v) in draft_header_map.iter_mut() {
-            if let Some(ref vn) = header_values.get(k.as_str()) {
+            if let Some(vn) = header_values.get(k.as_str()) {
                 *v = vn.as_str().to_string();
             }
         }
@@ -498,23 +480,22 @@ To: {}
             if k == "To" || k == "Cc" || k == "Bcc" {
                 self.form.push_cl((
                     k.into(),
-                    headers[k].to_string().into(),
+                    headers[k].to_string(),
                     Box::new(move |c, term| {
                         let book: &AddressBook = &c.accounts[&account_hash].address_book;
                         let results: Vec<String> = book.search(term);
                         results
                             .into_iter()
-                            .map(|r| AutoCompleteEntry::from(r))
+                            .map(AutoCompleteEntry::from)
                             .collect::<Vec<AutoCompleteEntry>>()
                     }),
                 ));
             } else if k == "From" {
                 self.form.push_cl((
                     k.into(),
-                    headers[k].to_string().into(),
+                    headers[k].to_string(),
                     Box::new(move |c, _term| {
-                        let results: Vec<(String, String)> = c
-                            .accounts
+                        c.accounts
                             .values()
                             .map(|acc| {
                                 let addr = if let Some(display_name) =
@@ -548,15 +529,12 @@ To: {}
 
                                 (addr, desc)
                             })
-                            .collect::<Vec<_>>();
-                        results
-                            .into_iter()
-                            .map(|r| AutoCompleteEntry::from(r))
+                            .map(AutoCompleteEntry::from)
                             .collect::<Vec<AutoCompleteEntry>>()
                     }),
                 ));
             } else {
-                self.form.push((k.into(), headers[k].to_string().into()));
+                self.form.push((k.into(), headers[k].to_string()));
             }
         }
     }
@@ -858,7 +836,7 @@ impl Component for Composer {
                     clear_area(grid, embed_area, theme_default);
                     copy_area(
                         grid,
-                        &guard.grid.buffer(),
+                        guard.grid.buffer(),
                         embed_area,
                         ((0, 0), pos_dec(guard.grid.terminal_size, (1, 1))),
                     );
@@ -871,7 +849,7 @@ impl Component for Composer {
                     let guard = embed_pty.lock().unwrap();
                     copy_area(
                         grid,
-                        &guard.grid.buffer(),
+                        guard.grid.buffer(),
                         embed_area,
                         ((0, 0), pos_dec(guard.grid.terminal_size, (1, 1))),
                     );
@@ -1120,8 +1098,7 @@ impl Component for Composer {
                 UIEvent::FinishedUIDialog(id, ref mut result),
             ) if selector.id() == *id => {
                 if let Some(to_val) = result.downcast_mut::<String>() {
-                    self.draft
-                        .set_header("To", std::mem::replace(to_val, String::new()));
+                    self.draft.set_header("To", std::mem::take(to_val));
                     self.update_form();
                 }
                 self.mode = ViewMode::Edit;
@@ -1677,7 +1654,7 @@ impl Component for Composer {
                 log(
                     format!(
                         "Executing: sh -c \"{}\"",
-                        editor_command.replace("\"", "\\\"")
+                        editor_command.replace('"', "\\\"")
                     ),
                     DEBUG,
                 );
@@ -1804,9 +1781,10 @@ impl Component for Composer {
                     return true;
                 }
                 Action::Compose(ComposeAction::AddAttachmentFilePicker(ref command)) => {
-                    let command = if let Some(ref cmd) = command
-                        .as_ref()
-                        .or_else(|| context.settings.terminal.file_picker_command.as_ref())
+                    let command = if let Some(cmd) =
+                        command
+                            .as_ref()
+                            .or(context.settings.terminal.file_picker_command.as_ref())
                     {
                         cmd.as_str()
                     } else {
@@ -1823,7 +1801,7 @@ impl Component for Composer {
                     }
 
                     log(
-                        format!("Executing: sh -c \"{}\"", command.replace("\"", "\\\"")),
+                        format!("Executing: sh -c \"{}\"", command.replace('"', "\\\"")),
                         DEBUG,
                     );
                     match Command::new("sh")
@@ -1838,7 +1816,7 @@ impl Component for Composer {
                             debug!(&String::from_utf8_lossy(&stderr));
                             for path in stderr.split(|c| [b'\0', b'\t', b'\n'].contains(c)) {
                                 match melib::email::compose::attachment_from_file(
-                                    &String::from_utf8_lossy(&path).as_ref(),
+                                    &String::from_utf8_lossy(path).as_ref(),
                                 ) {
                                     Ok(a) => {
                                         self.draft.attachments_mut().push(a);
@@ -1848,7 +1826,7 @@ impl Component for Composer {
                                         context.replies.push_back(UIEvent::Notification(
                                             Some(format!(
                                                 "could not add attachment: {}",
-                                                String::from_utf8_lossy(&path)
+                                                String::from_utf8_lossy(path)
                                             )),
                                             err.to_string(),
                                             Some(NotificationType::Error(
@@ -1984,7 +1962,7 @@ impl Component for Composer {
                 Some(Box::new(move |id: ComponentId, results: &[char]| {
                     Some(UIEvent::FinishedUIDialog(
                         id,
-                        Box::new(results.get(0).map(|c| *c).unwrap_or('n')),
+                        Box::new(results.get(0).copied().unwrap_or('n')),
                     ))
                 })),
                 context,
@@ -2033,7 +2011,7 @@ impl Component for Composer {
                 Some(Box::new(move |id: ComponentId, results: &[char]| {
                     Some(UIEvent::FinishedUIDialog(
                         id,
-                        Box::new(results.get(0).map(|c| *c).unwrap_or('n')),
+                        Box::new(results.get(0).copied().unwrap_or('n')),
                     ))
                 })),
                 context,
@@ -2136,7 +2114,7 @@ pub fn send_draft(
             let body: AttachmentBuilder = Attachment::new(
                 content_type,
                 Default::default(),
-                std::mem::replace(&mut draft.body, String::new()).into_bytes(),
+                std::mem::take(&mut draft.body).into_bytes(),
             )
             .into();
             draft.attachments.insert(0, body);
@@ -2195,6 +2173,7 @@ pub fn send_draft_async(
     let format_flowed = *account_settings!(context[account_hash].composing.format_flowed);
     let event_sender = context.sender.clone();
     #[cfg(feature = "gpgme")]
+    #[allow(clippy::type_complexity)]
     let mut filters_stack: Vec<
         Box<
             dyn FnOnce(
@@ -2207,7 +2186,7 @@ pub fn send_draft_async(
     #[cfg(feature = "gpgme")]
     if gpg_state.sign_mail.is_true() && !gpg_state.encrypt_mail.is_true() {
         filters_stack.push(Box::new(crate::components::mail::pgp::sign_filter(
-            gpg_state.sign_keys.clone(),
+            gpg_state.sign_keys,
         )?));
     } else if gpg_state.encrypt_mail.is_true() {
         filters_stack.push(Box::new(crate::components::mail::pgp::encrypt_filter(
@@ -2216,7 +2195,7 @@ pub fn send_draft_async(
             } else {
                 None
             },
-            gpg_state.encrypt_keys.clone(),
+            gpg_state.encrypt_keys,
         )?));
     }
     let send_mail = account_settings!(context[account_hash].composing.send_mail).clone();
@@ -2233,11 +2212,11 @@ pub fn send_draft_async(
     let mut body: AttachmentBuilder = Attachment::new(
         content_type,
         Default::default(),
-        std::mem::replace(&mut draft.body, String::new()).into_bytes(),
+        std::mem::take(&mut draft.body).into_bytes(),
     )
     .into();
     if !draft.attachments.is_empty() {
-        let mut parts = std::mem::replace(&mut draft.attachments, Vec::new());
+        let mut parts = std::mem::take(&mut draft.attachments);
         parts.insert(0, body);
         let boundary = ContentType::make_boundary(&parts);
         body = Attachment::new(
@@ -2261,7 +2240,7 @@ pub fn send_draft_async(
         let message = Arc::new(draft.finalise()?);
         let ret = send_cb(message.clone()).await;
         let is_ok = ret.is_ok();
-        if !is_ok || (store_sent_mail && is_ok) {
+        if !is_ok || store_sent_mail {
             event_sender
                 .send(ThreadEvent::UIEvent(UIEvent::Callback(CallbackFn(
                     Box::new(move |context| {

src/components/mail/compose/edit_attachments.rs

@@ -37,7 +37,7 @@ impl Default for EditAttachmentCursor {
 pub enum EditAttachmentMode {
     Overview,
     Edit {
-        inner: FormWidget<FormButtonActions>,
+        inner: Box<FormWidget<FormButtonActions>>,
         no: usize,
     },
 }
@@ -68,7 +68,7 @@ impl EditAttachments {
 }
 
 impl EditAttachmentsRefMut<'_, '_> {
-    fn new_edit_widget(&self, no: usize) -> Option<FormWidget<FormButtonActions>> {
+    fn new_edit_widget(&self, no: usize) -> Option<Box<FormWidget<FormButtonActions>>> {
         if no >= self.draft.attachments().len() {
             return None;
         }
@@ -80,7 +80,7 @@ impl EditAttachmentsRefMut<'_, '_> {
         ret.add_button(("Cancel".into(), FormButtonActions::Cancel));
         ret.push(("Filename".into(), filename.unwrap_or_default().to_string()));
         ret.push(("Mime type".into(), mime_type.to_string()));
-        Some(ret)
+        Some(Box::new(ret))
     }
 }
 

src/components/mail/compose/gpg.rs

@@ -36,7 +36,7 @@ pub enum KeySelection {
         err: MeliError,
     },
     Loaded {
-        widget: UIDialog<melib::gpgme::Key>,
+        widget: Box<UIDialog<melib::gpgme::Key>>,
         keys: Vec<melib::gpgme::Key>,
     },
 }
@@ -129,7 +129,7 @@ impl Component for KeySelection {
                                     match Self::new(
                                         *secret,
                                         *local,
-                                        std::mem::replace(pattern, String::new()),
+                                        std::mem::take(pattern),
                                         *allow_remote_lookup,
                                         context,
                                     ) {
@@ -166,7 +166,7 @@ impl Component for KeySelection {
                                 }
                                 return false;
                             }
-                            let mut widget = UIDialog::new(
+                            let mut widget = Box::new(UIDialog::new(
                                 "select key",
                                 keys.iter()
                                     .map(|k| {
@@ -185,12 +185,12 @@ impl Component for KeySelection {
                                     move |id: ComponentId, results: &[melib::gpgme::Key]| {
                                         Some(UIEvent::FinishedUIDialog(
                                             id,
-                                            Box::new(results.get(0).map(|k| k.clone())),
+                                            Box::new(results.get(0).cloned()),
                                         ))
                                     },
                                 )),
                                 context,
-                            );
+                            ));
                             widget.set_dirty(true);
                             *self = KeySelection::Loaded { widget, keys };
                         }
@@ -275,8 +275,8 @@ pub struct GpgComposeState {
     pub sign_keys: Vec<melib::gpgme::Key>,
 }
 
-impl GpgComposeState {
-    pub fn new() -> Self {
+impl Default for GpgComposeState {
+    fn default() -> Self {
         GpgComposeState {
             sign_mail: ToggleFlag::Unset,
             encrypt_mail: ToggleFlag::Unset,

src/components/mail/listing.rs

@@ -176,7 +176,6 @@ struct AccountMenuEntry {
     name: String,
     hash: AccountHash,
     index: usize,
-    visible: bool,
     entries: SmallVec<[MailboxMenuEntry; 16]>,
 }
 
@@ -380,7 +379,7 @@ pub trait MailListingTrait: ListingTrait {
                     .map(|&env_hash| account.operation(env_hash).and_then(|mut op| op.as_bytes()))
                     .collect::<Result<Vec<_>>>();
                 let path_ = path.to_path_buf();
-                let format = format.clone().unwrap_or_default();
+                let format = (*format).unwrap_or_default();
                 let collection = account.collection.clone();
                 let (sender, mut receiver) = crate::jobs::oneshot::channel();
                 let fut: Pin<Box<dyn Future<Output = Result<()>> + Send + 'static>> =
@@ -521,11 +520,11 @@ pub trait ListingTrait: Component {
 
 #[derive(Debug)]
 pub enum ListingComponent {
-    Plain(PlainListing),
-    Threaded(ThreadListing),
-    Compact(CompactListing),
-    Conversations(ConversationsListing),
-    Offline(OfflineListing),
+    Plain(Box<PlainListing>),
+    Threaded(Box<ThreadListing>),
+    Compact(Box<CompactListing>),
+    Conversations(Box<ConversationsListing>),
+    Offline(Box<OfflineListing>),
 }
 use crate::ListingComponent::*;
 
@@ -534,11 +533,11 @@ impl core::ops::Deref for ListingComponent {
 
     fn deref(&self) -> &Self::Target {
         match &self {
-            Compact(ref l) => l,
-            Plain(ref l) => l,
-            Threaded(ref l) => l,
-            Conversations(ref l) => l,
-            Offline(ref l) => l,
+            Compact(ref l) => l.as_ref(),
+            Plain(ref l) => l.as_ref(),
+            Threaded(ref l) => l.as_ref(),
+            Conversations(ref l) => l.as_ref(),
+            Offline(ref l) => l.as_ref(),
         }
     }
 }
@@ -546,11 +545,11 @@ impl core::ops::Deref for ListingComponent {
 impl core::ops::DerefMut for ListingComponent {
     fn deref_mut(&mut self) -> &mut (dyn MailListingTrait + 'static) {
         match self {
-            Compact(l) => l,
-            Plain(l) => l,
-            Threaded(l) => l,
-            Conversations(l) => l,
-            Offline(l) => l,
+            Compact(l) => l.as_mut(),
+            Plain(l) => l.as_mut(),
+            Threaded(l) => l.as_mut(),
+            Conversations(l) => l.as_mut(),
+            Offline(l) => l.as_mut(),
         }
     }
 }
@@ -611,7 +610,6 @@ pub struct Listing {
     accounts: Vec<AccountMenuEntry>,
     status: Option<AccountStatus>,
     dirty: bool,
-    visible: bool,
     cursor_pos: (usize, MenuEntryCursor),
     menu_cursor_pos: (usize, MenuEntryCursor),
     menu_content: CellBuffer,
@@ -755,12 +753,10 @@ impl Component for Listing {
                 }
                 return true;
             }
-            UIEvent::StartupCheck(ref f) => {
-                if self.component.coordinates().1 == *f {
-                    if !self.startup_checks_rate.tick() {
-                        return false;
-                    }
-                }
+            UIEvent::StartupCheck(ref f)
+                if self.component.coordinates().1 == *f && !self.startup_checks_rate.tick() =>
+            {
+                return false;
             }
             UIEvent::Timer(n) if *n == self.startup_checks_rate.id() => {
                 if self.startup_checks_rate.active {
@@ -1127,7 +1123,7 @@ impl Component for Listing {
                         Action::Listing(ListingAction::Import(file_path, mailbox_path)) => {
                             let account = &mut context.accounts[self.cursor_pos.0];
                             if let Err(err) = account
-                                .mailbox_by_path(&mailbox_path)
+                                .mailbox_by_path(mailbox_path)
                                 .and_then(|mailbox_hash| {
                                     Ok((
                                         std::fs::read(&file_path).chain_err_summary(|| {
@@ -1687,7 +1683,7 @@ impl Component for Listing {
                     .push_back(UIEvent::StatusEvent(StatusEvent::BufClear));
                 return true;
             }
-            UIEvent::Input(Key::Char(c)) if c >= '0' && c <= '9' => {
+            UIEvent::Input(Key::Char(c)) if ('0'..='9').contains(&c) => {
                 self.cmd_buf.push(c);
                 self.component.set_modifier_active(true);
                 context
@@ -1808,7 +1804,6 @@ impl Listing {
                     name: a.name().to_string(),
                     hash: *h,
                     index: i,
-                    visible: true,
                     entries,
                 }
             })
@@ -1818,7 +1813,6 @@ impl Listing {
             component: Offline(OfflineListing::new((first_account_hash, 0))),
             accounts: account_entries,
             status: None,
-            visible: true,
             dirty: true,
             cursor_pos: (0, MenuEntryCursor::Mailbox(0)),
             menu_cursor_pos: (0, MenuEntryCursor::Mailbox(0)),
@@ -1954,7 +1948,6 @@ impl Listing {
 
         #[derive(Copy, Debug, Clone)]
         struct Line {
-            visible: bool,
             collapsed: bool,
             depth: usize,
             inc: usize,
@@ -1990,7 +1983,7 @@ impl Listing {
                 indentation,
                 has_sibling,
                 mailbox_hash,
-                visible,
+                visible: _,
                 collapsed,
             },
         ) in self.accounts[aidx].entries.iter().enumerate()
@@ -1999,7 +1992,6 @@ impl Listing {
                 match context.accounts[self.accounts[aidx].index][&mailbox_hash].status {
                     crate::conf::accounts::MailboxStatus::Failed(_) => {
                         lines.push(Line {
-                            visible,
                             collapsed,
                             depth,
                             inc: i,
@@ -2012,7 +2004,6 @@ impl Listing {
                     }
                     _ => {
                         lines.push(Line {
-                            visible,
                             collapsed,
                             depth,
                             inc: i,

src/components/mail/listing/compact.rs

@@ -172,9 +172,12 @@ pub struct CompactListing {
     /// Cache current view.
     data_columns: DataColumns,
     rows_drawn: SegmentTree,
+    #[allow(clippy::type_complexity)]
     rows: Vec<((usize, (ThreadHash, EnvelopeHash)), EntryStrings)>,
 
+    #[allow(clippy::type_complexity)]
     search_job: Option<(String, JoinHandle<Result<SmallVec<[EnvelopeHash; 512]>>>)>,
+    #[allow(clippy::type_complexity)]
     select_job: Option<(String, JoinHandle<Result<SmallVec<[EnvelopeHash; 512]>>>)>,
     filter_term: String,
     filtered_selection: Vec<ThreadHash>,
@@ -220,7 +223,7 @@ impl MailListingTrait for CompactListing {
             .flatten()
             .chain(cursor_iter.into_iter().flatten())
             .cloned();
-        SmallVec::from_iter(iter.into_iter())
+        SmallVec::from_iter(iter)
     }
 
     /// Fill the `self.data_columns` `CellBuffers` with the contents of the account mailbox the user has
@@ -324,6 +327,7 @@ impl MailListingTrait for CompactListing {
         self.length = 0;
         let mut rows = Vec::with_capacity(1024);
         let mut min_width = (0, 0, 0, 0);
+        #[allow(clippy::type_complexity)]
         let mut row_widths: (
             SmallVec<[u8; 1024]>,
             SmallVec<[u8; 1024]>,
@@ -404,11 +408,7 @@ impl MailListingTrait for CompactListing {
             );
             /* subject */
             row_widths.3.push(
-                (entry_strings
-                    .flag
-                    .grapheme_width()
-                    .try_into()
-                    .unwrap_or(255)
+                (entry_strings.flag.grapheme_width()
                     + 1
                     + entry_strings.subject.grapheme_width()
                     + 1
@@ -876,8 +876,8 @@ impl fmt::Display for CompactListing {
 
 impl CompactListing {
     pub const DESCRIPTION: &'static str = "compact listing";
-    pub fn new(coordinates: (AccountHash, MailboxHash)) -> Self {
-        CompactListing {
+    pub fn new(coordinates: (AccountHash, MailboxHash)) -> Box<Self> {
+        Box::new(CompactListing {
             cursor_pos: (coordinates.0, 1, 0),
             new_cursor_pos: (coordinates.0, coordinates.1, 0),
             length: 0,
@@ -905,8 +905,9 @@ impl CompactListing {
             modifier_active: false,
             modifier_command: None,
             id: ComponentId::new_v4(),
-        }
+        })
     }
+
     fn make_entry_string(
         &self,
         e: &Envelope,
@@ -1423,7 +1424,7 @@ impl CompactListing {
             }
             /* Set fg color for flags */
             let mut x = 0;
-            if self.selection.get(&thread_hash).cloned().unwrap_or(false) {
+            if self.selection.get(thread_hash).cloned().unwrap_or(false) {
                 x += selected_flag_len;
             }
             if thread.snoozed() {
@@ -1887,7 +1888,7 @@ impl Component for CompactListing {
             UIEvent::EnvelopeRename(ref old_hash, ref new_hash) => {
                 let account = &context.accounts[&self.cursor_pos.0];
                 let threads = account.collection.get_threads(self.cursor_pos.1);
-                if !account.collection.contains_key(&new_hash) {
+                if !account.collection.contains_key(new_hash) {
                     return false;
                 }
                 let new_env_thread_node_hash = account.collection.get_env(*new_hash).thread();
@@ -1917,7 +1918,7 @@ impl Component for CompactListing {
             UIEvent::EnvelopeUpdate(ref env_hash) => {
                 let account = &context.accounts[&self.cursor_pos.0];
                 let threads = account.collection.get_threads(self.cursor_pos.1);
-                if !account.collection.contains_key(&env_hash) {
+                if !account.collection.contains_key(env_hash) {
                     return false;
                 }
                 let new_env_thread_node_hash = account.collection.get_env(*env_hash).thread();

src/components/mail/listing/conversations.rs

@@ -101,8 +101,10 @@ pub struct ConversationsListing {
     subsort: (SortField, SortOrder),
     all_threads: HashSet<ThreadHash>,
     order: HashMap<ThreadHash, usize>,
+    #[allow(clippy::type_complexity)]
     rows: std::result::Result<Vec<((usize, (ThreadHash, EnvelopeHash)), EntryStrings)>, String>,
 
+    #[allow(clippy::type_complexity)]
     search_job: Option<(String, JoinHandle<Result<SmallVec<[EnvelopeHash; 512]>>>)>,
     filter_term: String,
     filtered_selection: Vec<ThreadHash>,
@@ -148,7 +150,7 @@ impl MailListingTrait for ConversationsListing {
             .flatten()
             .chain(cursor_iter.into_iter().flatten())
             .cloned();
-        SmallVec::from_iter(iter.into_iter())
+        SmallVec::from_iter(iter)
     }
 
     fn refresh_mailbox(&mut self, context: &mut Context, force: bool) {
@@ -376,7 +378,7 @@ impl ListingTrait for ConversationsListing {
         if let Err(message) = self.rows.as_ref() {
             clear_area(grid, area, self.color_cache.theme_default);
             write_string_to_grid(
-                &message,
+                message,
                 grid,
                 self.color_cache.theme_default.fg,
                 self.color_cache.theme_default.bg,
@@ -584,8 +586,8 @@ impl ConversationsListing {
     const DESCRIPTION: &'static str = "conversations listing";
     //const PADDING_CHAR: char = ' '; //░';
 
-    pub fn new(coordinates: (AccountHash, MailboxHash)) -> Self {
-        ConversationsListing {
+    pub fn new(coordinates: (AccountHash, MailboxHash)) -> Box<Self> {
+        Box::new(ConversationsListing {
             cursor_pos: (coordinates.0, 1, 0),
             new_cursor_pos: (coordinates.0, coordinates.1, 0),
             length: 0,
@@ -609,7 +611,7 @@ impl ConversationsListing {
             modifier_active: false,
             modifier_command: None,
             id: ComponentId::new_v4(),
-        }
+        })
     }
 
     pub(super) fn make_entry_string(
@@ -714,8 +716,7 @@ impl ConversationsListing {
                     .settings
                     .listing
                     .datetime_fmt
-                    .as_ref()
-                    .map(String::as_str)
+                    .as_deref()
                     .or(Some("%Y-%m-%d %T")),
                 false,
             ),
@@ -1226,7 +1227,7 @@ impl Component for ConversationsListing {
                 UIEvent::EnvelopeRename(ref old_hash, ref new_hash) => {
                     let account = &context.accounts[&self.cursor_pos.0];
                     let threads = account.collection.get_threads(self.cursor_pos.1);
-                    if !account.collection.contains_key(&new_hash) {
+                    if !account.collection.contains_key(new_hash) {
                         return false;
                     }
                     let env_thread_node_hash = account.collection.get_env(*new_hash).thread();
@@ -1258,7 +1259,7 @@ impl Component for ConversationsListing {
                 UIEvent::EnvelopeUpdate(ref env_hash) => {
                     let account = &context.accounts[&self.cursor_pos.0];
                     let threads = account.collection.get_threads(self.cursor_pos.1);
-                    if !account.collection.contains_key(&env_hash) {
+                    if !account.collection.contains_key(env_hash) {
                         return false;
                     }
                     let env_thread_node_hash = account.collection.get_env(*env_hash).thread();

src/components/mail/listing/offline.rs

@@ -41,7 +41,7 @@ impl MailListingTrait for OfflineListing {
     }
 
     fn get_focused_items(&self, _context: &Context) -> SmallVec<[ThreadHash; 8]> {
-        return SmallVec::new();
+        SmallVec::new()
     }
 
     fn refresh_mailbox(&mut self, _context: &mut Context, _force: bool) {}
@@ -93,14 +93,14 @@ impl fmt::Display for OfflineListing {
 }
 
 impl OfflineListing {
-    pub fn new(cursor_pos: (AccountHash, MailboxHash)) -> Self {
-        OfflineListing {
+    pub fn new(cursor_pos: (AccountHash, MailboxHash)) -> Box<Self> {
+        Box::new(