Use hashbrown::HashMap

Cargo.toml

@@ -32,6 +32,7 @@ term_size = { version = "0.3.1", optional = true }
 crossbeam-channel = "0.3.6"
 lazy_static = "1.2.0"
 chrono = "0.4.6"
+hashbrown = "0.1.8"
 
 [dependencies.num]
 default-features = false

src/backend/blt.rs

@@ -5,7 +5,7 @@
 
 use bear_lib_terminal;
 
-use std::collections::HashSet;
+use hashbrown::HashSet;
 
 use self::bear_lib_terminal::geometry::Size;
 use self::bear_lib_terminal::terminal::{
@@ -17,7 +17,6 @@ use crate::backend;
 use crate::event::{Event, Key, MouseButton, MouseEvent};
 use crate::theme::{BaseColor, Color, ColorPair, Effect};
 use crate::vec::Vec2;
-use unicode_width::UnicodeWidthStr;
 
 enum ColorRole {
     Foreground,

src/backend/curses/mod.rs

@@ -3,7 +3,7 @@
 //! Requires either of `ncurses-backend` or `pancurses-backend`.
 #![cfg(any(feature = "ncurses-backend", feature = "pancurses-backend"))]
 
-use std::collections::HashMap;
+use hashbrown::HashMap;
 
 use crate::event::{Event, Key};
 use crate::theme::{BaseColor, Color, ColorPair};

src/backend/curses/n.rs

@@ -1,10 +1,9 @@
 //! Ncurses-specific backend.
 use log::{debug, warn};
-use maplit::hashmap;
 use ncurses;
 
+use hashbrown::HashMap;
 use std::cell::{Cell, RefCell};
-use std::collections::HashMap;
 use std::ffi::CString;
 use std::fs::File;
 use std::io;
@@ -456,50 +455,47 @@ where
 
 fn initialize_keymap() -> HashMap<i32, Event> {
     // First, define the static mappings.
-    let mut map = hashmap! {
+    let mut map = HashMap::new();
-
     // Value sent by ncurses when nothing happens
-        -1 => Event::Refresh,
+    map.insert(-1, Event::Refresh);
 
     // Values under 256 are chars and control values
-        //
     // Tab is '\t'
-        9 => Event::Key(Key::Tab),
+    map.insert(9, Event::Key(Key::Tab));
     // Treat '\n' and the numpad Enter the same
-        10 => Event::Key(Key::Enter),
+    map.insert(10, Event::Key(Key::Enter));
-        ncurses::KEY_ENTER => Event::Key(Key::Enter),
+    map.insert(ncurses::KEY_ENTER, Event::Key(Key::Enter));
     // This is the escape key when pressed by itself.
     // When used for control sequences,
     // it should have been caught earlier.
-        27 => Event::Key(Key::Esc),
+    map.insert(27, Event::Key(Key::Esc));
     // `Backspace` sends 127, but Ctrl-H sends `Backspace`
-        127 => Event::Key(Key::Backspace),
+    map.insert(127, Event::Key(Key::Backspace));
-        ncurses::KEY_BACKSPACE => Event::Key(Key::Backspace),
+    map.insert(ncurses::KEY_BACKSPACE, Event::Key(Key::Backspace));
 
-        410 => Event::WindowResize,
+    map.insert(410, Event::WindowResize);
 
-        ncurses::KEY_B2 => Event::Key(Key::NumpadCenter),
+    map.insert(ncurses::KEY_B2, Event::Key(Key::NumpadCenter));
-        ncurses::KEY_DC => Event::Key(Key::Del),
+    map.insert(ncurses::KEY_DC, Event::Key(Key::Del));
-        ncurses::KEY_IC => Event::Key(Key::Ins),
+    map.insert(ncurses::KEY_IC, Event::Key(Key::Ins));
-        ncurses::KEY_BTAB => Event::Shift(Key::Tab),
+    map.insert(ncurses::KEY_BTAB, Event::Shift(Key::Tab));
-        ncurses::KEY_SLEFT => Event::Shift(Key::Left),
+    map.insert(ncurses::KEY_SLEFT, Event::Shift(Key::Left));
-        ncurses::KEY_SRIGHT => Event::Shift(Key::Right),
+    map.insert(ncurses::KEY_SRIGHT, Event::Shift(Key::Right));
-        ncurses::KEY_LEFT => Event::Key(Key::Left),
+    map.insert(ncurses::KEY_LEFT, Event::Key(Key::Left));
-        ncurses::KEY_RIGHT => Event::Key(Key::Right),
+    map.insert(ncurses::KEY_RIGHT, Event::Key(Key::Right));
-        ncurses::KEY_UP => Event::Key(Key::Up),
+    map.insert(ncurses::KEY_UP, Event::Key(Key::Up));
-        ncurses::KEY_DOWN => Event::Key(Key::Down),
+    map.insert(ncurses::KEY_DOWN, Event::Key(Key::Down));
-        ncurses::KEY_SR => Event::Shift(Key::Up),
+    map.insert(ncurses::KEY_SR, Event::Shift(Key::Up));
-        ncurses::KEY_SF => Event::Shift(Key::Down),
+    map.insert(ncurses::KEY_SF, Event::Shift(Key::Down));
-        ncurses::KEY_PPAGE => Event::Key(Key::PageUp),
+    map.insert(ncurses::KEY_PPAGE, Event::Key(Key::PageUp));
-        ncurses::KEY_NPAGE => Event::Key(Key::PageDown),
+    map.insert(ncurses::KEY_NPAGE, Event::Key(Key::PageDown));
-        ncurses::KEY_HOME => Event::Key(Key::Home),
+    map.insert(ncurses::KEY_HOME, Event::Key(Key::Home));
-        ncurses::KEY_END => Event::Key(Key::End),
+    map.insert(ncurses::KEY_END, Event::Key(Key::End));
-        ncurses::KEY_SHOME => Event::Shift(Key::Home),
+    map.insert(ncurses::KEY_SHOME, Event::Shift(Key::Home));
-        ncurses::KEY_SEND => Event::Shift(Key::End),
+    map.insert(ncurses::KEY_SEND, Event::Shift(Key::End));
-        ncurses::KEY_SDC => Event::Shift(Key::Del),
+    map.insert(ncurses::KEY_SDC, Event::Shift(Key::Del));
-        ncurses::KEY_SNEXT => Event::Shift(Key::PageDown),
+    map.insert(ncurses::KEY_SNEXT, Event::Shift(Key::PageDown));
-        ncurses::KEY_SPREVIOUS => Event::Shift(Key::PageUp),
+    map.insert(ncurses::KEY_SPREVIOUS, Event::Shift(Key::PageUp));
-    };
 
     // Then add some dynamic ones
 

src/backend/curses/pan.rs

@@ -2,8 +2,8 @@
 use log::{debug, warn};
 use pancurses;
 
+use hashbrown::HashMap;
 use std::cell::{Cell, RefCell};
-use std::collections::HashMap;
 use std::io::{stdout, Write};
 
 use crate::backend;

src/cursive.rs

@@ -1,5 +1,5 @@
+use hashbrown::HashMap;
 use std::any::Any;
-use std::collections::HashMap;
 use std::path::Path;
 use std::time::Duration;
 

src/theme/palette.rs

@@ -3,7 +3,7 @@ use enum_map::{enum_map, Enum, EnumMap};
 use log::warn;
 use toml;
 
-use std::collections::HashMap;
+use hashbrown::HashMap;
 use std::ops::{Index, IndexMut};
 
 /// Color configuration for the application.