use std::fs::File;
use std::io::Read;
use lsp_types::{
DidChangeTextDocumentParams, FileOperationFilter, FileOperationPattern,
FileOperationPatternKind, FileOperationRegistrationOptions, OneOf, Position, Range,
RenameFilesParams, SaveOptions, ServerCapabilities, TextDocumentSyncCapability,
TextDocumentSyncKind, TextDocumentSyncOptions, Url, WorkspaceFileOperationsServerCapabilities,
WorkspaceFoldersServerCapabilities, WorkspaceServerCapabilities,
};
use erg_common::dict::Dict;
use erg_common::shared::Shared;
use erg_common::traits::DequeStream;
use erg_compiler::erg_parser::lex::Lexer;
use erg_compiler::erg_parser::token::{Token, TokenStream};
use crate::_log;
use crate::server::ELSResult;
use crate::util::{self, NormalizedUrl};
fn _get_code_from_uri(uri: &Url) -> ELSResult<String> {
let path = uri
.to_file_path()
.or_else(|_| util::denormalize(uri.clone()).to_file_path())
.map_err(|_| format!("invalid file path: {uri}"))?;
let mut code = String::new();
File::open(path.as_path())?.read_to_string(&mut code)?;
Ok(code)
}
#[derive(Debug, Clone)]
pub struct FileCacheEntry {
pub code: String,
pub ver: i32,
pub token_stream: Option<TokenStream>,
}
impl FileCacheEntry {
pub fn get_line(&self, line0: u32) -> Option<String> {
let mut lines = self.code.lines();
lines.nth(line0 as usize).map(|s| s.to_string())
}
}
#[derive(Debug, Clone)]
pub struct FileCache {
pub files: Shared<Dict<NormalizedUrl, FileCacheEntry>>,
}
impl FileCache {
pub fn new() -> Self {
Self {
files: Shared::new(Dict::new()),
}
}
fn load_once(&self, uri: &NormalizedUrl) -> ELSResult<()> {
if self.files.borrow_mut().get(uri).is_some() {
return Ok(());
}
let code = _get_code_from_uri(uri)?;
self.update(uri, code, None);
Ok(())
}
pub(crate) fn set_capabilities(&mut self, capabilities: &mut ServerCapabilities) {
let workspace_folders = WorkspaceFoldersServerCapabilities {
supported: Some(true),
change_notifications: Some(OneOf::Left(true)),
};
let file_op = FileOperationRegistrationOptions {
filters: vec![
FileOperationFilter {
scheme: Some(String::from("file")),
pattern: FileOperationPattern {
glob: String::from("**/*.{er,py}"),
matches: Some(FileOperationPatternKind::File),
options: None,
},
},
FileOperationFilter {
scheme: Some(String::from("file")),
pattern: FileOperationPattern {
glob: String::from("**"),
matches: Some(FileOperationPatternKind::Folder),
options: None,
},
},
],
};
capabilities.workspace = Some(WorkspaceServerCapabilities {
workspace_folders: Some(workspace_folders),
file_operations: Some(WorkspaceFileOperationsServerCapabilities {
will_rename: Some(file_op),
..Default::default()
}),
});
let sync_option = TextDocumentSyncOptions {
open_close: Some(true),
change: Some(TextDocumentSyncKind::INCREMENTAL),
save: Some(SaveOptions::default().into()),
..Default::default()
};
capabilities.text_document_sync = Some(TextDocumentSyncCapability::Options(sync_option));
}
pub fn get_entire_code(&self, uri: &NormalizedUrl) -> ELSResult<String> {
self.load_once(uri)?;
Ok(self
.files
.borrow_mut()
.get(uri)
.ok_or("not found")?
.code
.clone())
}
pub fn get_token_stream(&self, uri: &NormalizedUrl) -> Option<TokenStream> {
let _ = self.load_once(uri);
self.files.borrow_mut().get(uri)?.token_stream.clone()
}
pub fn get_token(&self, uri: &NormalizedUrl, pos: Position) -> Option<Token> {
let _ = self.load_once(uri);
let ent = self.files.borrow_mut();
let tokens = ent.get(uri)?.token_stream.as_ref()?;
for tok in tokens.iter() {
if util::pos_in_loc(tok, pos) {
return Some(tok.clone());
}
}
None
}
pub fn get_token_relatively(
&self,
uri: &NormalizedUrl,
pos: Position,
offset: isize,
) -> Option<Token> {
let _ = self.load_once(uri);
let ent = self.files.borrow_mut();
let tokens = ent.get(uri)?.token_stream.as_ref()?;
let index = (|| {
for (i, tok) in tokens.iter().enumerate() {
if util::pos_in_loc(tok, pos) {
return Some(i);
}
}
None
})()?;
let index = (index as isize + offset) as usize;
if index < tokens.len() {
Some(tokens[index].clone())
} else {
None
}
}
pub(crate) fn get_line(&self, uri: &NormalizedUrl, line0: u32) -> Option<String> {
let _ = self.load_once(uri);
self.files.borrow_mut().get(uri)?.get_line(line0)
}
pub(crate) fn get_ranged(
&self,
uri: &NormalizedUrl,
range: Range,
) -> ELSResult<Option<String>> {
self.load_once(uri)?;
let ent = self.files.borrow_mut();
let file = ent.get(uri).ok_or("not found")?;
let mut code = String::new();
for (i, line) in file.code.lines().enumerate() {
if i >= range.start.line as usize && i <= range.end.line as usize {
if i == range.start.line as usize && i == range.end.line as usize {
if line.len() < range.end.character as usize {
return Ok(None);
}
code.push_str(
&line[range.start.character as usize..range.end.character as usize],
);
} else if i == range.start.line as usize {
code.push_str(&line[range.start.character as usize..]);
code.push('\n');
} else if i == range.end.line as usize {
if line.len() < range.end.character as usize {
return Ok(None);
}
code.push_str(&line[..range.end.character as usize]);
} else {
code.push_str(line);
code.push('\n');
}
}
}
Ok(Some(code))
}
pub(crate) fn update(&self, uri: &NormalizedUrl, code: String, ver: Option<i32>) {
let ent = self.files.borrow_mut();
let entry = ent.get(uri);
if let Some(entry) = entry {
if ver.map_or(false, |ver| ver <= entry.ver) {
return;
}
}
let token_stream = Lexer::from_str(code.clone()).lex().ok();
let ver = ver.unwrap_or({
if let Some(entry) = entry {
entry.ver
} else {
1
}
});
drop(ent);
self.files.borrow_mut().insert(
uri.clone(),
FileCacheEntry {
code,
ver,
token_stream,
},
);
}
pub(crate) fn _ranged_update(&self, uri: &NormalizedUrl, old: Range, new_code: &str) {
let mut ent = self.files.borrow_mut();
let Some(entry) = ent.get_mut(uri) else {
return;
};
let mut code = entry.code.clone();
let start = util::pos_to_byte_index(&code, old.start);
let end = util::pos_to_byte_index(&code, old.end);
code.replace_range(start..end, new_code);
let token_stream = Lexer::from_str(code.clone()).lex().ok();
entry.code = code;
entry.token_stream = token_stream;
}
pub(crate) fn incremental_update(&self, params: DidChangeTextDocumentParams) {
let uri = NormalizedUrl::new(params.text_document.uri);
let mut ent = self.files.borrow_mut();
let Some(entry) = ent.get_mut(&uri) else {
return;
};
if entry.ver >= params.text_document.version {
return;
}
let mut code = entry.code.clone();
for change in params.content_changes {
let Some(range) = change.range else {
continue;
};
let start = util::pos_to_byte_index(&code, range.start);
let end = util::pos_to_byte_index(&code, range.end);
code.replace_range(start..end, &change.text);
}
let token_stream = Lexer::from_str(code.clone()).lex().ok();
entry.code = code;
entry.ver = params.text_document.version;
entry.token_stream = token_stream;
}
#[allow(unused)]
pub fn remove(&mut self, uri: &NormalizedUrl) {
self.files.borrow_mut().remove(uri);
}
pub fn rename_files(&mut self, params: &RenameFilesParams) -> ELSResult<()> {
for file in ¶ms.files {
let Ok(old_uri) = NormalizedUrl::parse(&file.old_uri) else {
_log!("failed to parse old uri: {}", file.old_uri);
continue;
};
let Ok(new_uri) = NormalizedUrl::parse(&file.new_uri) else {
_log!("failed to parse new uri: {}", file.new_uri);
continue;
};
let Some(entry) = self.files.borrow_mut().remove(&old_uri) else {
_log!("failed to find old uri: {}", file.old_uri);
continue;
};
self.files.borrow_mut().insert(new_uri, entry);
}
Ok(())
}
}