crates/test-utils/src/fixture.rs
use std::path::PathBuf;
use base_db::{DocumentLocation, FeatureParams, Owner, Workspace};
use line_index::{LineCol, LineIndex};
use rowan::{TextRange, TextSize};
use url::Url;
#[derive(Debug)]
pub struct Fixture {
pub workspace: Workspace,
pub documents: Vec<DocumentSpec>,
}
impl Fixture {
pub fn parse(input: &str) -> Fixture {
let mut documents = Vec::new();
let mut start = 0;
for end in input
.match_indices("%!")
.skip(1)
.map(|(i, _)| i)
.chain(std::iter::once(input.len()))
{
documents.push(DocumentSpec::parse(&input[start..end]));
start = end;
}
let mut workspace = Workspace::default();
for document in &documents {
let path = PathBuf::from(document.uri.path());
let language = distro::Language::from_path(&path).unwrap_or(distro::Language::Tex);
workspace.open(
document.uri.clone(),
document.text.clone(),
language,
Owner::Client,
LineCol { line: 0, col: 0 },
);
}
Self {
workspace,
documents,
}
}
pub fn make_params(&self) -> Option<(FeatureParams, TextSize)> {
let spec = self
.documents
.iter()
.find(|spec| spec.cursor.is_some())
.or_else(|| self.documents.first())?;
let document = self.workspace.lookup(&spec.uri)?;
let params = FeatureParams::new(&self.workspace, document);
let cursor = spec.cursor.unwrap_or_default();
Some((params, cursor))
}
pub fn locations(&self) -> impl Iterator<Item = DocumentLocation> {
self.documents.iter().flat_map(|spec| {
let document = self.workspace.lookup(&spec.uri).unwrap();
spec.ranges
.iter()
.map(|range| DocumentLocation::new(document, *range))
})
}
}
#[derive(Debug)]
pub struct DocumentSpec {
pub uri: Url,
pub text: String,
pub cursor: Option<TextSize>,
pub ranges: Vec<TextRange>,
}
impl DocumentSpec {
pub fn parse(input: &str) -> Self {
let (uri_str, input) = input
.trim()
.strip_prefix("%! ")
.map(|input| input.split_once('\n').unwrap_or((input, "")))
.unwrap();
let uri = Url::parse(&format!("file:///texlab/{uri_str}")).unwrap();
let mut ranges = Vec::new();
let mut cursor = None;
let mut text = String::new();
let mut line_nbr = 0;
for line in input.lines().map(|line| line.trim_end()) {
if line.chars().all(|c| matches!(c, ' ' | '^' | '|' | '!')) && !line.is_empty() {
cursor = cursor.or_else(|| {
let offset = line.find('|')?;
Some(CharacterPosition::new(line_nbr, offset))
});
if let Some(start) = line.find('!') {
let position = CharacterPosition::new(line_nbr, start);
ranges.push(CharacterRange::new(position, position));
}
if let Some(start) = line.find('^') {
let end = line.rfind('^').unwrap() + 1;
let start = CharacterPosition::new(line_nbr, start);
let end = CharacterPosition::new(line_nbr, end);
ranges.push(CharacterRange::new(start, end));
}
} else {
text.push_str(line);
text.push('\n');
line_nbr += 1;
}
}
let line_index = LineIndex::new(&text);
let cursor = cursor.and_then(|cursor| cursor.to_offset(&text, &line_index));
let ranges = ranges
.into_iter()
.filter_map(|range| range.to_offset(&text, &line_index))
.collect();
Self {
uri,
text,
cursor,
ranges,
}
}
}
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
struct CharacterPosition {
line: usize,
col: usize,
}
impl CharacterPosition {
fn new(line: usize, col: usize) -> Self {
Self { line, col }
}
fn to_offset(self, text: &str, line_index: &LineIndex) -> Option<TextSize> {
let start = line_index.offset(LineCol {
line: (self.line - 1) as u32,
col: 0,
})?;
let slice = &text[start.into()..];
let len = slice
.char_indices()
.nth(self.col)
.map_or_else(|| slice.len(), |(i, _)| i);
Some(start + TextSize::try_from(len).ok()?)
}
}
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
struct CharacterRange {
start: CharacterPosition,
end: CharacterPosition,
}
impl CharacterRange {
fn new(start: CharacterPosition, end: CharacterPosition) -> Self {
Self { start, end }
}
fn to_offset(self, text: &str, line_index: &LineIndex) -> Option<TextRange> {
let start = self.start.to_offset(text, line_index)?;
let end = self.end.to_offset(text, line_index)?;
Some(TextRange::new(start, end))
}
}