Improve performance

This prevents a HashMap from unnecessarily being rebuilt a bunch of
times.

Cargo.toml

@@ -24,6 +24,7 @@ regex = "1.10.2"
 json = "0.12.4"
 open = "5.0.0"
 inputbot = "0.6.0"
+lazy_static = "1.4.0"
 
 [build-dependencies]
 embed-resource = "2.4.0"

src/keys.rs

@@ -5,17 +5,86 @@ use inputbot::KeybdKey::{self, *};
 use json::JsonValue;
 use regex::Regex;
 use std::collections::HashMap;
+use lazy_static::lazy_static;
 
 use crate::config;
 
+lazy_static! {
+	static ref KEY_MAP: HashMap<&'static str, KeybdKey> = [
+		("CTRL", LControlKey),
+		("LCTRL", LControlKey),
+		("RCTRL", RControlKey),
+		("ALT", LAltKey),
+		("LALT", LAltKey),
+		("RALT", RAltKey),
+		("WIN", LSuper),
+		("LWIN", LSuper),
+		("RWIN", RSuper),
+		("SHIFT", LShiftKey),
+		("LSHIFT", LShiftKey),
+		("RSHIFT", RShiftKey),
+		("F1", F1Key),
+		("F2", F2Key),
+		("F3", F3Key),
+		("F4", F4Key),
+		("F5", F5Key),
+		("F6", F6Key),
+		("F7", F7Key),
+		("F8", F8Key),
+		("F9", F9Key),
+		("F10", F10Key),
+		("F11", F11Key),
+		("F12", F12Key),
+		("A", AKey),
+		("B", BKey),
+		("C", CKey),
+		("D", DKey),
+		("E", EKey),
+		("F", FKey),
+		("G", GKey),
+		("H", HKey),
+		("I", IKey),
+		("J", JKey),
+		("K", KKey),
+		("L", LKey),
+		("M", MKey),
+		("N", NKey),
+		("O", OKey),
+		("P", PKey),
+		("Q", QKey),
+		("R", RKey),
+		("S", SKey),
+		("T", TKey),
+		("U", UKey),
+		("V", VKey),
+		("W", WKey),
+		("X", XKey),
+		("Y", YKey),
+		("Z", ZKey),
+		("1", Numrow1Key),
+		("2", Numrow2Key),
+		("3", Numrow3Key),
+		("4", Numrow4Key),
+		("5", Numrow5Key),
+		("6", Numrow6Key),
+		("7", Numrow7Key),
+		("8", Numrow8Key),
+		("9", Numrow9Key),
+		("0", Numrow0Key),
+	]
+	.iter() 
+	.cloned()
+	.collect();
+}
+
 pub async fn init() {
 	bind_shortcuts();
 	inputbot::handle_input_events();
 }
 
 pub fn bind_shortcuts() {
 	let my_config = config::read();
-	for (_, value) in key_map().iter() {
+	for (_, value) in KEY_MAP.iter() {
 		value.unbind();
 	}
 	for i in 0..8 {
@@ -27,7 +96,7 @@ pub fn bind_shortcuts() {
 					.take(shortcut.len() - 1)
 					.all(|key| key.is_pressed())
 				{
-					for (_, value) in key_map().iter() {
+					for (_, value) in KEY_MAP.iter() {
 						if value.is_pressed() && !shortcut.contains(value) {
 							return inputbot::BlockInput::DontBlock;
 						}
@@ -86,79 +155,10 @@ pub fn check_keyboard_shortcut(input: String) -> bool {
 	return re.unwrap().is_match(&input);
 }
 
-fn key_map() -> HashMap<&'static str, KeybdKey> {
-	[
-		("CTRL", LControlKey),
-		("LCTRL", LControlKey),
-		("RCTRL", RControlKey),
-		("ALT", LAltKey),
-		("LALT", LAltKey),
-		("RALT", RAltKey),
-		("WIN", LSuper),
-		("LWIN", LSuper),
-		("RWIN", RSuper),
-		("SHIFT", LShiftKey),
-		("LSHIFT", LShiftKey),
-		("RSHIFT", RShiftKey),
-		("F1", F1Key),
-		("F2", F2Key),
-		("F3", F3Key),
-		("F4", F4Key),
-		("F5", F5Key),
-		("F6", F6Key),
-		("F7", F7Key),
-		("F8", F8Key),
-		("F9", F9Key),
-		("F10", F10Key),
-		("F11", F11Key),
-		("F12", F12Key),
-		("A", AKey),
-		("B", BKey),
-		("C", CKey),
-		("D", DKey),
-		("E", EKey),
-		("F", FKey),
-		("G", GKey),
-		("H", HKey),
-		("I", IKey),
-		("J", JKey),
-		("K", KKey),
-		("L", LKey),
-		("M", MKey),
-		("N", NKey),
-		("O", OKey),
-		("P", PKey),
-		("Q", QKey),
-		("R", RKey),
-		("S", SKey),
-		("T", TKey),
-		("U", UKey),
-		("V", VKey),
-		("W", WKey),
-		("X", XKey),
-		("Y", YKey),
-		("Z", ZKey),
-		("1", Numrow1Key),
-		("2", Numrow2Key),
-		("3", Numrow3Key),
-		("4", Numrow4Key),
-		("5", Numrow5Key),
-		("6", Numrow6Key),
-		("7", Numrow7Key),
-		("8", Numrow8Key),
-		("9", Numrow9Key),
-		("0", Numrow0Key),
-	]
-	.iter()
-	.cloned()
-	.collect()
-}
-
 fn build_keyboard_shortcut(input: &str) -> Vec<KeybdKey> {
-	let key_map = key_map();
 	input
 		.split('+')
-		.filter_map(|part| key_map.get(&part))
+		.filter_map(|part| KEY_MAP.get(&part))
 		.cloned()
 		.collect()
 }