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JT 2021-07-23 07:50:59 +12:00
parent 07c22c7e81
commit 37f8ff0efc
7 changed files with 227 additions and 39 deletions
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3
Cargo.toml
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@ -6,4 +6,5 @@ edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
reedline = {git = "https://github.com/jntrnr/reedline"}
reedline = {path = "../reedline"}
nu-ansi-term = "0.32.0"

110
src/flatten.rs Normal file
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@ -0,0 +1,110 @@
use crate::{Block, Expr, Expression, ParserWorkingSet, Pipeline, Span, Statement};
#[derive(Debug)]
pub enum FlatShape {
Garbage,
Int,
InternalCall,
External,
Literal,
Operator,
Signature,
String,
Variable,
}
impl<'a> ParserWorkingSet<'a> {
pub fn flatten_block(&self, block: &Block) -> Vec<(Span, FlatShape)> {
let mut output = vec![];
for stmt in &block.stmts {
output.extend(self.flatten_statement(stmt));
}
output
}
pub fn flatten_statement(&self, stmt: &Statement) -> Vec<(Span, FlatShape)> {
match stmt {
Statement::Expression(expr) => self.flatten_expression(expr),
Statement::Pipeline(pipeline) => self.flatten_pipeline(pipeline),
}
}
pub fn flatten_expression(&self, expr: &Expression) -> Vec<(Span, FlatShape)> {
match &expr.expr {
Expr::BinaryOp(lhs, op, rhs) => {
let mut output = vec![];
output.extend(self.flatten_expression(&lhs));
output.extend(self.flatten_expression(&op));
output.extend(self.flatten_expression(&rhs));
output
}
Expr::Block(block_id) => self.flatten_block(
self.get_block(*block_id)
.expect("internal error: missing block"),
),
Expr::Call(call) => {
let mut output = vec![];
output.push((call.head, FlatShape::InternalCall));
for positional in &call.positional {
output.extend(self.flatten_expression(positional));
}
output
}
Expr::ExternalCall(..) => {
vec![(expr.span, FlatShape::External)]
}
Expr::Garbage => {
vec![(expr.span, FlatShape::Garbage)]
}
Expr::Int(_) => {
vec![(expr.span, FlatShape::Int)]
}
Expr::List(list) => {
let mut output = vec![];
for l in list {
output.extend(self.flatten_expression(l));
}
output
}
Expr::Literal(_) => {
vec![(expr.span, FlatShape::Literal)]
}
Expr::Operator(_) => {
vec![(expr.span, FlatShape::Operator)]
}
Expr::Signature(_) => {
vec![(expr.span, FlatShape::Signature)]
}
Expr::String(_) => {
vec![(expr.span, FlatShape::String)]
}
Expr::Subexpression(block_id) => self.flatten_block(
self.get_block(*block_id)
.expect("internal error: missing block"),
),
Expr::Table(headers, cells) => {
let mut output = vec![];
for e in headers {
output.extend(self.flatten_expression(e));
}
for row in cells {
for expr in row {
output.extend(self.flatten_expression(expr));
}
}
output
}
Expr::Var(_) => {
vec![(expr.span, FlatShape::Variable)]
}
}
}
pub fn flatten_pipeline(&self, pipeline: &Pipeline) -> Vec<(Span, FlatShape)> {
let mut output = vec![];
for expr in &pipeline.expressions {
output.extend(self.flatten_expression(expr))
}
output
}
}

2
src/lib.rs
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@ -1,5 +1,6 @@
mod declaration;
mod eval;
mod flatten;
mod lex;
mod lite_parse;
mod parse_error;
@ -22,3 +23,4 @@ pub use parser::{
pub use parser_state::{BlockId, DeclId, ParserState, ParserWorkingSet, VarId};
pub use signature::Signature;
pub use span::Span;
pub use syntax_highlight::NuHighlighter;

11
src/main.rs
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@ -1,6 +1,6 @@
use std::{cell::RefCell, rc::Rc};
use engine_q::{ParserState, ParserWorkingSet, Signature, SyntaxShape};
use engine_q::{NuHighlighter, ParserState, ParserWorkingSet, Signature, SyntaxShape};
fn main() -> std::io::Result<()> {
let parser_state = Rc::new(RefCell::new(ParserState::new()));
@ -109,8 +109,11 @@ fn main() -> std::io::Result<()> {
} else {
use reedline::{DefaultPrompt, FileBackedHistory, Reedline, Signal};
let mut line_editor =
Reedline::new().with_history(Box::new(FileBackedHistory::new(1000)))?;
let mut line_editor = Reedline::new()
.with_history(Box::new(FileBackedHistory::new(1000)))?
.with_highlighter(Box::new(NuHighlighter {
parser_state: parser_state.clone(),
}));
let prompt = DefaultPrompt::new(1);
let mut current_line = 1;
@ -132,7 +135,7 @@ fn main() -> std::io::Result<()> {
s.as_bytes(),
false,
);
println!("{:#?}", output);
println!("{:?}", output);
println!("Error: {:?}", err);
working_set.render()
};

20
src/parser.rs
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@ -104,6 +104,7 @@ pub enum Operator {
pub struct Call {
/// identifier of the declaration to call
pub decl_id: DeclId,
pub head: Span,
pub positional: Vec<Expression>,
pub named: Vec<(String, Option<Expression>)>,
}
@ -118,6 +119,7 @@ impl Call {
pub fn new() -> Call {
Self {
decl_id: 0,
head: Span::unknown(),
positional: vec![],
named: vec![],
}
@ -557,6 +559,7 @@ impl<'a> ParserWorkingSet<'a> {
let mut call = Call::new();
call.decl_id = decl_id;
call.head = command_span;
let decl = self
.get_decl(decl_id)
@ -616,18 +619,19 @@ impl<'a> ParserWorkingSet<'a> {
let end = if decl.signature.rest_positional.is_some() {
spans.len()
} else {
println!("num_positionals: {}", decl.signature.num_positionals());
println!("positional_idx: {}", positional_idx);
println!("spans.len(): {}", spans.len());
println!("spans_idx: {}", spans_idx);
// println!("num_positionals: {}", decl.signature.num_positionals());
// println!("positional_idx: {}", positional_idx);
// println!("spans.len(): {}", spans.len());
// println!("spans_idx: {}", spans_idx);
let remainder = decl.signature.num_positionals() - positional_idx;
if remainder > spans.len() {
if remainder >= spans.len() {
spans.len()
} else {
spans.len() - remainder + 1
}
};
// println!("end: {}", end);
let (arg, err) =
self.parse_multispan_value(&spans[..end], &mut spans_idx, positional.shape);
@ -1669,6 +1673,10 @@ impl<'a> ParserWorkingSet<'a> {
if idx == spans.len() {
// Handle broken math expr `1 +` etc
error = error.or(Some(ParseError::IncompleteMathExpression(spans[idx - 1])));
expr_stack.push(Expression::garbage(spans[idx - 1]));
expr_stack.push(Expression::garbage(spans[idx - 1]));
break;
}
@ -1947,7 +1955,7 @@ impl<'a> ParserWorkingSet<'a> {
#[cfg(test)]
mod tests {
use crate::{parser_state, ParseError, ParserState, Signature};
use crate::{ParseError, ParserState, Signature};
use super::*;

25
src/parser_state.rs
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@ -97,6 +97,10 @@ impl ParserState {
self.decls.get(decl_id)
}
pub fn get_block(&self, block_id: BlockId) -> Option<&Block> {
self.blocks.get(block_id)
}
pub fn next_span_start(&self) -> usize {
self.file_contents.len()
}
@ -310,21 +314,30 @@ impl<'a> ParserWorkingSet<'a> {
next_id
}
pub fn get_variable(&self, var_id: VarId) -> Option<Type> {
pub fn get_variable(&self, var_id: VarId) -> Option<&Type> {
let num_permanent_vars = self.permanent_state.num_vars();
if var_id < num_permanent_vars {
self.permanent_state.get_var(var_id).cloned()
self.permanent_state.get_var(var_id)
} else {
self.delta.vars.get(var_id - num_permanent_vars).cloned()
self.delta.vars.get(var_id - num_permanent_vars)
}
}
pub fn get_decl(&self, decl_id: DeclId) -> Option<Declaration> {
pub fn get_decl(&self, decl_id: DeclId) -> Option<&Declaration> {
let num_permanent_decls = self.permanent_state.num_decls();
if decl_id < num_permanent_decls {
self.permanent_state.get_decl(decl_id).cloned()
self.permanent_state.get_decl(decl_id)
} else {
self.delta.decls.get(decl_id - num_permanent_decls).cloned()
self.delta.decls.get(decl_id - num_permanent_decls)
}
}
pub fn get_block(&self, block_id: BlockId) -> Option<&Block> {
let num_permanent_blocks = self.permanent_state.num_blocks();
if block_id < num_permanent_blocks {
self.permanent_state.get_block(block_id)
} else {
self.delta.blocks.get(block_id - num_permanent_blocks)
}
}

95
src/syntax_highlight.rs
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@ -1,36 +1,87 @@
use crate::flatten::FlatShape;
use crate::{ParserState, ParserWorkingSet};
use nu_ansi_term::Style;
use reedline::{Highlighter, StyledText};
use std::{cell::RefCell, rc::Rc};
use crate::{Block, Expr, Expression, ParserState, ParserWorkingSet, Statement};
struct Highlighter {
parser_state: Rc<RefCell<ParserState>>,
pub struct NuHighlighter {
pub parser_state: Rc<RefCell<ParserState>>,
}
impl Highlighter {
fn syntax_highlight(&self, input: &[u8]) {
let block = {
impl Highlighter for NuHighlighter {
fn highlight(&self, line: &str) -> StyledText {
let (shapes, global_span_offset) = {
let parser_state = self.parser_state.borrow();
let mut working_set = ParserWorkingSet::new(&*parser_state);
let (block, _) = working_set.parse_source(input, false);
let (block, _) = working_set.parse_source(line.as_bytes(), false);
block
let shapes = working_set.flatten_block(&block);
(shapes, parser_state.next_span_start())
};
// let (block, _) = working_set.parse_source(input, false);
let mut output = StyledText::default();
let mut last_seen_span = global_span_offset;
// for stmt in &block.stmts {
// match stmt {
// Statement::Expression(expr) => {
for shape in &shapes {
if shape.0.end <= last_seen_span {
// We've already output something for this span
// so just skip this one
continue;
}
if shape.0.start > last_seen_span {
let gap = line
[(last_seen_span - global_span_offset)..(shape.0.start - global_span_offset)]
.to_string();
output.push((Style::new(), gap));
}
// }
// }
// }
// No merge at the end because this parse is speculative
}
let next_token = line
[(shape.0.start - global_span_offset)..(shape.0.end - global_span_offset)]
.to_string();
match shape.1 {
FlatShape::External => output.push((Style::new().bold(), next_token)),
FlatShape::Garbage => output.push((
Style::new()
.fg(nu_ansi_term::Color::White)
.on(nu_ansi_term::Color::Red)
.bold(),
next_token,
)),
FlatShape::InternalCall => output.push((
Style::new().fg(nu_ansi_term::Color::LightBlue).bold(),
next_token,
)),
FlatShape::Int => {
output.push((Style::new().fg(nu_ansi_term::Color::Green), next_token))
}
FlatShape::Literal => {
output.push((Style::new().fg(nu_ansi_term::Color::Blue), next_token))
}
FlatShape::Operator => output.push((
Style::new().fg(nu_ansi_term::Color::LightPurple).bold(),
next_token,
)),
FlatShape::Signature => output.push((
Style::new().fg(nu_ansi_term::Color::Green).bold(),
next_token,
)),
FlatShape::String => output.push((
Style::new().fg(nu_ansi_term::Color::Yellow).bold(),
next_token,
)),
FlatShape::Variable => output.push((
Style::new().fg(nu_ansi_term::Color::Blue).bold(),
next_token,
)),
}
last_seen_span = shape.0.end;
}
fn highlight_expression(expression: &Expression) {
// match &expression.expr {
// Expr::BinaryOp()
// }
let remainder = line[(last_seen_span - global_span_offset)..].to_string();
if !remainder.is_empty() {
output.push((Style::new(), remainder));
}
output
}
}