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-rw-r--r--helix-view/src/document.rs61
-rw-r--r--helix-view/src/input.rs226
-rw-r--r--helix-view/src/lib.rs8
3 files changed, 267 insertions, 28 deletions
diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index e9a8097c..8875f70d 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -1,5 +1,7 @@
use anyhow::{anyhow, Context, Error};
+use serde::de::{self, Deserialize, Deserializer};
use std::cell::Cell;
+use std::collections::HashMap;
use std::fmt::Display;
use std::future::Future;
use std::path::{Component, Path, PathBuf};
@@ -15,8 +17,6 @@ use helix_core::{
use crate::{DocumentId, ViewId};
-use std::collections::HashMap;
-
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum Mode {
Normal,
@@ -24,6 +24,40 @@ pub enum Mode {
Insert,
}
+impl Display for Mode {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ Mode::Normal => f.write_str("normal"),
+ Mode::Select => f.write_str("select"),
+ Mode::Insert => f.write_str("insert"),
+ }
+ }
+}
+
+impl FromStr for Mode {
+ type Err = Error;
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ match s {
+ "normal" => Ok(Mode::Normal),
+ "select" => Ok(Mode::Select),
+ "insert" => Ok(Mode::Insert),
+ _ => Err(anyhow!("Invalid mode '{}'", s)),
+ }
+ }
+}
+
+// toml deserializer doesn't seem to recognize string as enum
+impl<'de> Deserialize<'de> for Mode {
+ fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+ where
+ D: Deserializer<'de>,
+ {
+ let s = String::deserialize(deserializer)?;
+ s.parse().map_err(de::Error::custom)
+ }
+}
+
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum IndentStyle {
Tabs,
@@ -88,29 +122,6 @@ impl fmt::Debug for Document {
}
}
-impl Display for Mode {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- match self {
- Mode::Normal => f.write_str("normal"),
- Mode::Select => f.write_str("select"),
- Mode::Insert => f.write_str("insert"),
- }
- }
-}
-
-impl FromStr for Mode {
- type Err = Error;
-
- fn from_str(s: &str) -> Result<Self, Self::Err> {
- match s {
- "normal" => Ok(Mode::Normal),
- "select" => Ok(Mode::Select),
- "insert" => Ok(Mode::Insert),
- _ => Err(anyhow!("Invalid mode '{}'", s)),
- }
- }
-}
-
/// Like std::mem::replace() except it allows the replacement value to be mapped from the
/// original value.
fn take_with<T, F>(mut_ref: &mut T, closure: F)
diff --git a/helix-view/src/input.rs b/helix-view/src/input.rs
new file mode 100644
index 00000000..ab417819
--- /dev/null
+++ b/helix-view/src/input.rs
@@ -0,0 +1,226 @@
+//! Input event handling, currently backed by crossterm.
+use anyhow::{anyhow, Error};
+use crossterm::event;
+use serde::de::{self, Deserialize, Deserializer};
+use std::fmt;
+
+pub use crossterm::event::{KeyCode, KeyModifiers};
+
+/// Represents a key event.
+// We use a newtype here because we want to customize Deserialize and Display.
+#[derive(Debug, PartialEq, Eq, PartialOrd, Clone, Copy, Hash)]
+pub struct KeyEvent {
+ pub code: KeyCode,
+ pub modifiers: KeyModifiers,
+}
+
+impl fmt::Display for KeyEvent {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> std::fmt::Result {
+ f.write_fmt(format_args!(
+ "{}{}{}",
+ if self.modifiers.contains(KeyModifiers::SHIFT) {
+ "S-"
+ } else {
+ ""
+ },
+ if self.modifiers.contains(KeyModifiers::ALT) {
+ "A-"
+ } else {
+ ""
+ },
+ if self.modifiers.contains(KeyModifiers::CONTROL) {
+ "C-"
+ } else {
+ ""
+ },
+ ))?;
+ match self.code {
+ KeyCode::Backspace => f.write_str("backspace")?,
+ KeyCode::Enter => f.write_str("ret")?,
+ KeyCode::Left => f.write_str("left")?,
+ KeyCode::Right => f.write_str("right")?,
+ KeyCode::Up => f.write_str("up")?,
+ KeyCode::Down => f.write_str("down")?,
+ KeyCode::Home => f.write_str("home")?,
+ KeyCode::End => f.write_str("end")?,
+ KeyCode::PageUp => f.write_str("pageup")?,
+ KeyCode::PageDown => f.write_str("pagedown")?,
+ KeyCode::Tab => f.write_str("tab")?,
+ KeyCode::BackTab => f.write_str("backtab")?,
+ KeyCode::Delete => f.write_str("del")?,
+ KeyCode::Insert => f.write_str("ins")?,
+ KeyCode::Null => f.write_str("null")?,
+ KeyCode::Esc => f.write_str("esc")?,
+ KeyCode::Char('<') => f.write_str("lt")?,
+ KeyCode::Char('>') => f.write_str("gt")?,
+ KeyCode::Char('+') => f.write_str("plus")?,
+ KeyCode::Char('-') => f.write_str("minus")?,
+ KeyCode::Char(';') => f.write_str("semicolon")?,
+ KeyCode::Char('%') => f.write_str("percent")?,
+ KeyCode::F(i) => f.write_fmt(format_args!("F{}", i))?,
+ KeyCode::Char(c) => f.write_fmt(format_args!("{}", c))?,
+ };
+ Ok(())
+ }
+}
+
+impl std::str::FromStr for KeyEvent {
+ type Err = Error;
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ let mut tokens: Vec<_> = s.split('-').collect();
+ let code = match tokens.pop().ok_or_else(|| anyhow!("Missing key code"))? {
+ "backspace" => KeyCode::Backspace,
+ "space" => KeyCode::Char(' '),
+ "ret" => KeyCode::Enter,
+ "lt" => KeyCode::Char('<'),
+ "gt" => KeyCode::Char('>'),
+ "plus" => KeyCode::Char('+'),
+ "minus" => KeyCode::Char('-'),
+ "semicolon" => KeyCode::Char(';'),
+ "percent" => KeyCode::Char('%'),
+ "left" => KeyCode::Left,
+ "right" => KeyCode::Right,
+ "up" => KeyCode::Down,
+ "home" => KeyCode::Home,
+ "end" => KeyCode::End,
+ "pageup" => KeyCode::PageUp,
+ "pagedown" => KeyCode::PageDown,
+ "tab" => KeyCode::Tab,
+ "backtab" => KeyCode::BackTab,
+ "del" => KeyCode::Delete,
+ "ins" => KeyCode::Insert,
+ "null" => KeyCode::Null,
+ "esc" => KeyCode::Esc,
+ single if single.len() == 1 => KeyCode::Char(single.chars().next().unwrap()),
+ function if function.len() > 1 && function.starts_with('F') => {
+ let function: String = function.chars().skip(1).collect();
+ let function = str::parse::<u8>(&function)?;
+ (function > 0 && function < 13)
+ .then(|| KeyCode::F(function))
+ .ok_or_else(|| anyhow!("Invalid function key '{}'", function))?
+ }
+ invalid => return Err(anyhow!("Invalid key code '{}'", invalid)),
+ };
+
+ let mut modifiers = KeyModifiers::empty();
+ for token in tokens {
+ let flag = match token {
+ "S" => KeyModifiers::SHIFT,
+ "A" => KeyModifiers::ALT,
+ "C" => KeyModifiers::CONTROL,
+ _ => return Err(anyhow!("Invalid key modifier '{}-'", token)),
+ };
+
+ if modifiers.contains(flag) {
+ return Err(anyhow!("Repeated key modifier '{}-'", token));
+ }
+ modifiers.insert(flag);
+ }
+
+ Ok(KeyEvent { code, modifiers })
+ }
+}
+
+impl<'de> Deserialize<'de> for KeyEvent {
+ fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+ where
+ D: Deserializer<'de>,
+ {
+ let s = String::deserialize(deserializer)?;
+ s.parse().map_err(de::Error::custom)
+ }
+}
+
+impl From<event::KeyEvent> for KeyEvent {
+ fn from(event::KeyEvent { code, modifiers }: event::KeyEvent) -> KeyEvent {
+ KeyEvent { code, modifiers }
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+
+ #[test]
+ fn parsing_unmodified_keys() {
+ assert_eq!(
+ str::parse::<KeyEvent>("backspace").unwrap(),
+ KeyEvent {
+ code: KeyCode::Backspace,
+ modifiers: KeyModifiers::NONE
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>("left").unwrap(),
+ KeyEvent {
+ code: KeyCode::Left,
+ modifiers: KeyModifiers::NONE
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>(",").unwrap(),
+ KeyEvent {
+ code: KeyCode::Char(','),
+ modifiers: KeyModifiers::NONE
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>("w").unwrap(),
+ KeyEvent {
+ code: KeyCode::Char('w'),
+ modifiers: KeyModifiers::NONE
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>("F12").unwrap(),
+ KeyEvent {
+ code: KeyCode::F(12),
+ modifiers: KeyModifiers::NONE
+ }
+ );
+ }
+
+ #[test]
+ fn parsing_modified_keys() {
+ assert_eq!(
+ str::parse::<KeyEvent>("S-minus").unwrap(),
+ KeyEvent {
+ code: KeyCode::Char('-'),
+ modifiers: KeyModifiers::SHIFT
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>("C-A-S-F12").unwrap(),
+ KeyEvent {
+ code: KeyCode::F(12),
+ modifiers: KeyModifiers::SHIFT | KeyModifiers::CONTROL | KeyModifiers::ALT
+ }
+ );
+
+ assert_eq!(
+ str::parse::<KeyEvent>("S-C-2").unwrap(),
+ KeyEvent {
+ code: KeyCode::Char('2'),
+ modifiers: KeyModifiers::SHIFT | KeyModifiers::CONTROL
+ }
+ );
+ }
+
+ #[test]
+ fn parsing_nonsensical_keys_fails() {
+ assert!(str::parse::<KeyEvent>("F13").is_err());
+ assert!(str::parse::<KeyEvent>("F0").is_err());
+ assert!(str::parse::<KeyEvent>("aaa").is_err());
+ assert!(str::parse::<KeyEvent>("S-S-a").is_err());
+ assert!(str::parse::<KeyEvent>("C-A-S-C-1").is_err());
+ assert!(str::parse::<KeyEvent>("FU").is_err());
+ assert!(str::parse::<KeyEvent>("123").is_err());
+ assert!(str::parse::<KeyEvent>("S--").is_err());
+ }
+}
diff --git a/helix-view/src/lib.rs b/helix-view/src/lib.rs
index 20613451..8b635700 100644
--- a/helix-view/src/lib.rs
+++ b/helix-view/src/lib.rs
@@ -3,14 +3,16 @@ pub mod macros;
pub mod document;
pub mod editor;
+pub mod input;
pub mod register_selection;
pub mod theme;
pub mod tree;
pub mod view;
-use slotmap::new_key_type;
-new_key_type! { pub struct DocumentId; }
-new_key_type! { pub struct ViewId; }
+slotmap::new_key_type! {
+ pub struct DocumentId;
+ pub struct ViewId;
+}
pub use document::Document;
pub use editor::Editor;
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-27 10:35:44 +0000