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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| use colored::*; | ||
| use lazy_static::lazy_static; | ||
| use regex::{Captures, Regex}; | ||
| use rustyline::{ | ||
| error::ReadlineError, | ||
| highlight::Highlighter, | ||
| validate::{MatchingBracketValidator, ValidationContext, ValidationResult, Validator}, | ||
| }; | ||
| use rustyline_derive::{Completer, Helper, Hinter}; | ||
| use std::borrow::Cow; | ||
| use std::collections::HashSet; | ||
|
|
||
| const STRING_COLOR: Color = Color::Green; | ||
| const KEYWORD_COLOR: Color = Color::Yellow; | ||
| const PROPERTY_COLOR: Color = Color::Magenta; | ||
| const OPERATOR_COLOR: Color = Color::TrueColor { | ||
| r: 214, | ||
| g: 95, | ||
| b: 26, | ||
| }; | ||
| const UNDEFINED_COLOR: Color = Color::TrueColor { | ||
| r: 100, | ||
| g: 100, | ||
| b: 100, | ||
| }; | ||
|
|
||
| #[derive(Completer, Helper, Hinter)] | ||
| pub(crate) struct RLHelper { | ||
| highlighter: LineHighlighter, | ||
| validator: MatchingBracketValidator, | ||
| } | ||
|
|
||
| impl RLHelper { | ||
| #[inline] | ||
| pub(crate) fn new() -> Self { | ||
| Self { | ||
| highlighter: LineHighlighter, | ||
| validator: MatchingBracketValidator::new(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Validator for RLHelper { | ||
| fn validate(&self, ctx: &mut ValidationContext<'_>) -> Result<ValidationResult, ReadlineError> { | ||
| self.validator.validate(ctx) | ||
| } | ||
|
|
||
| fn validate_while_typing(&self) -> bool { | ||
| self.validator.validate_while_typing() | ||
| } | ||
| } | ||
|
|
||
| impl Highlighter for RLHelper { | ||
| fn highlight_hint<'h>(&self, hint: &'h str) -> Cow<'h, str> { | ||
| hint.into() | ||
| } | ||
|
|
||
| fn highlight<'l>(&self, line: &'l str, pos: usize) -> Cow<'l, str> { | ||
| self.highlighter.highlight(line, pos) | ||
| } | ||
|
|
||
| fn highlight_candidate<'c>( | ||
| &self, | ||
| candidate: &'c str, | ||
| _completion: rustyline::CompletionType, | ||
| ) -> Cow<'c, str> { | ||
| self.highlighter.highlight(candidate, 0) | ||
| } | ||
|
|
||
| fn highlight_char(&self, line: &str, _: usize) -> bool { | ||
| !line.is_empty() | ||
| } | ||
| } | ||
|
|
||
| lazy_static! { | ||
| static ref KEYWORDS: HashSet<&'static str> = { | ||
| let mut keywords = HashSet::new(); | ||
| keywords.insert("break"); | ||
| keywords.insert("case"); | ||
| keywords.insert("catch"); | ||
| keywords.insert("class"); | ||
| keywords.insert("const"); | ||
| keywords.insert("continue"); | ||
| keywords.insert("default"); | ||
| keywords.insert("delete"); | ||
| keywords.insert("do"); | ||
| keywords.insert("else"); | ||
| keywords.insert("export"); | ||
| keywords.insert("extends"); | ||
| keywords.insert("finally"); | ||
| keywords.insert("for"); | ||
| keywords.insert("function"); | ||
| keywords.insert("if"); | ||
| keywords.insert("import"); | ||
| keywords.insert("instanceof"); | ||
| keywords.insert("new"); | ||
| keywords.insert("return"); | ||
| keywords.insert("super"); | ||
| keywords.insert("switch"); | ||
| keywords.insert("this"); | ||
| keywords.insert("throw"); | ||
| keywords.insert("try"); | ||
| keywords.insert("typeof"); | ||
| keywords.insert("var"); | ||
| keywords.insert("void"); | ||
| keywords.insert("while"); | ||
| keywords.insert("with"); | ||
| keywords.insert("yield"); | ||
| keywords.insert("await"); | ||
| keywords.insert("enum"); | ||
| keywords.insert("let"); | ||
| keywords | ||
| }; | ||
| } | ||
|
|
||
| struct LineHighlighter; | ||
|
|
||
| impl Highlighter for LineHighlighter { | ||
| fn highlight<'l>(&self, line: &'l str, _: usize) -> Cow<'l, str> { | ||
| let mut coloured = line.to_string(); | ||
|
|
||
| let reg = Regex::new( | ||
| r#"(?x) | ||
| (?P<identifier>[$A-z_]+[$A-z_0-9]*) | | ||
| (?P<string_double_quote>"([^"\\]|\\.)*") | | ||
| (?P<string_single_quote>'([^'\\]|\\.)*') | | ||
| (?P<op>[+\-/*%~^!&|=<>;:])"#, | ||
| ) | ||
| .unwrap(); | ||
|
|
||
| coloured = reg | ||
| .replace_all(&coloured, |caps: &Captures<'_>| { | ||
| if let Some(cap) = caps.name("identifier") { | ||
| match cap.as_str() { | ||
| "true" | "false" | "null" | "Infinity" | "globalThis" => { | ||
| cap.as_str().color(PROPERTY_COLOR).to_string() | ||
| } | ||
| "undefined" => cap.as_str().color(UNDEFINED_COLOR).to_string(), | ||
| identifier if KEYWORDS.contains(identifier) => { | ||
| cap.as_str().color(KEYWORD_COLOR).bold().to_string() | ||
| } | ||
| _ => cap.as_str().to_string(), | ||
| } | ||
| } else if let Some(cap) = caps.name("string_double_quote") { | ||
| cap.as_str().color(STRING_COLOR).to_string() | ||
| } else if let Some(cap) = caps.name("string_single_quote") { | ||
| cap.as_str().color(STRING_COLOR).to_string() | ||
| } else if let Some(cap) = caps.name("op") { | ||
| cap.as_str().color(OPERATOR_COLOR).to_string() | ||
| } else { | ||
| caps[0].to_string() | ||
| } | ||
| }) | ||
| .to_string(); | ||
|
|
||
| coloured.into() | ||
| } | ||
| } |
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