refactor input system

src/config.rs

@@ -0,0 +1,172 @@
+use std::collections::HashMap;
+use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
+use crate::{action::Action, app::{Mode, PartialAction}};
+
+pub struct Config(
+	pub HashMap<Mode, ModeConfig>
+);
+
+pub struct ModeConfig(
+	pub HashMap<Option<PartialAction>, Keybinds>
+);
+
+pub struct Keybinds(
+	pub HashMap<Keypress, Action>
+);
+
+#[derive(PartialEq, Eq, Hash)]
+pub struct Keypress {
+	code: KeyCode,
+	modifiers: KeyModifiers
+}
+
+impl<const N: usize> From<[(Mode, ModeConfig); N]> for Config {
+	fn from(array: [(Mode, ModeConfig); N]) -> Self {
+		Self(array.into())
+	}
+}
+
+impl<const N: usize> From<[(Option<PartialAction>, Keybinds); N]> for ModeConfig {
+	fn from(array: [(Option<PartialAction>, Keybinds); N]) -> Self {
+		Self(array.into())
+	}
+}
+
+impl<const N: usize> From<[(Keypress, Action); N]> for Keybinds {
+	fn from(array: [(Keypress, Action); N]) -> Self {
+		Self(array.into())
+	}
+}
+
+impl From<KeyCode> for Keypress {
+	fn from(key_code: KeyCode) -> Self {
+		Self {
+			code: key_code,
+			modifiers: KeyModifiers::NONE
+		}
+	}
+}
+
+const fn modifier_from_character(character: char) -> Option<KeyModifiers> {
+	match character {
+		'A' => Some(KeyModifiers::ALT),
+		'C' => Some(KeyModifiers::CONTROL),
+		_ => None
+	}
+}
+
+impl TryFrom<&str> for Keypress {
+	type Error = ();
+	
+	fn try_from(string: &str) -> Result<Self, ()> {
+		match string.len() {
+			3 => {
+				Ok(Self {
+					code: KeyCode::Char(
+						string.chars().nth(2).unwrap()
+					),
+					modifiers: modifier_from_character(
+						string.chars().nth(0).unwrap()
+					).ok_or(())?,
+				})
+			}
+			1 => {
+				Ok(
+					KeyCode::Char(
+						string.chars().nth(0).unwrap()
+					).into()
+				)
+			}
+			_ => Err(())
+		}
+	}
+}
+
+impl From<KeyEvent> for Keypress {
+	fn from(event: KeyEvent) -> Self {
+		Self {
+			code: event.code,
+			modifiers: match event.modifiers {
+				KeyModifiers::SHIFT => KeyModifiers::NONE,
+				x => x,
+			},
+		}
+	}
+}
+
+impl Default for Config {
+	fn default() -> Self {
+		[
+			(Mode::Normal, [
+				(None, [
+					("q".try_into().unwrap(), Action::Quit),
+					
+					("v".try_into().unwrap(), Action::SelectMode),
+					
+					("g".try_into().unwrap(), Action::GPartial),
+					("z".try_into().unwrap(), Action::ZPartial),
+					("r".try_into().unwrap(), Action::RPartial),
+					
+					("i".try_into().unwrap(), Action::MoveByteUp),
+					("k".try_into().unwrap(), Action::MoveByteDown),
+					("j".try_into().unwrap(), Action::MoveByteLeft),
+					("l".try_into().unwrap(), Action::MoveByteRight),
+					
+					("G".try_into().unwrap(), Action::GotoFileEnd),
+					
+					("C-e".try_into().unwrap(), Action::ScrollDown),
+					("C-y".try_into().unwrap(), Action::ScrollUp),
+					
+					("C-d".try_into().unwrap(), Action::PageCursorHalfDown),
+					("C-u".try_into().unwrap(), Action::PageCursorHalfUp),
+					
+					("C-f".try_into().unwrap(), Action::PageDown),
+					("C-b".try_into().unwrap(), Action::PageUp),
+					
+					("w".try_into().unwrap(), Action::MoveNextWordStart),
+					("e".try_into().unwrap(), Action::MoveNextWordEnd),
+					("b".try_into().unwrap(), Action::MovePreviousWordStart),
+					
+					(";".try_into().unwrap(), Action::CollapseSelection),
+				].into()),
+				(Some(PartialAction::Goto), [
+					("j".try_into().unwrap(), Action::GotoLineStart),
+					("l".try_into().unwrap(), Action::GotoLineEnd),
+					
+					("g".try_into().unwrap(), Action::GotoFileStart),
+				].into())
+			].into()),
+			(Mode::Select, [
+				(None, [
+					("q".try_into().unwrap(), Action::Quit),
+					
+					("v".try_into().unwrap(), Action::NormalMode),
+					
+					("g".try_into().unwrap(), Action::GPartial),
+					("z".try_into().unwrap(), Action::ZPartial),
+					("r".try_into().unwrap(), Action::RPartial),
+					
+					// ("i".try_into().unwrap(), Action::ExtendByteUp),
+					// ("k".try_into().unwrap(), Action::ExtendByteDown),
+					// ("j".try_into().unwrap(), Action::ExtendByteLeft),
+					// ("l".try_into().unwrap(), Action::ExtendByteRight),
+					
+					("C-e".try_into().unwrap(), Action::ScrollDown),
+					("C-y".try_into().unwrap(), Action::ScrollUp),
+					
+					("C-d".try_into().unwrap(), Action::PageCursorHalfDown),
+					("C-u".try_into().unwrap(), Action::PageCursorHalfUp),
+					
+					("C-f".try_into().unwrap(), Action::PageDown),
+					("C-b".try_into().unwrap(), Action::PageUp),
+					
+					// ("w".try_into().unwrap(), Action::ExtendNextWordStart),
+					// ("e".try_into().unwrap(), Action::ExtendNextWordEnd),
+					// ("b".try_into().unwrap(), Action::ExtendPreviousWordStart),
+					
+					(";".try_into().unwrap(), Action::CollapseSelection),
+				].into())
+			].into())
+		].into()
+	}
+}