use anyhow::{anyhow, bail, Context, Error}; use arc_swap::access::DynAccess; use arc_swap::ArcSwap; use futures_util::future::BoxFuture; use futures_util::FutureExt; use helix_core::auto_pairs::AutoPairs; use helix_core::doc_formatter::TextFormat; use helix_core::encoding::Encoding; use helix_core::syntax::Highlight; use helix_core::text_annotations::{InlineAnnotation, TextAnnotations}; use helix_core::Range; use helix_vcs::{DiffHandle, DiffProviderRegistry}; use ::parking_lot::Mutex; use serde::de::{self, Deserialize, Deserializer}; use serde::Serialize; use std::borrow::Cow; use std::cell::Cell; use std::collections::HashMap; use std::fmt::Display; use std::future::Future; use std::path::{Path, PathBuf}; use std::rc::Rc; use std::str::FromStr; use std::sync::{Arc, Weak}; use std::time::SystemTime; use helix_core::{ encoding, history::{History, State, UndoKind}, indent::{auto_detect_indent_style, IndentStyle}, line_ending::auto_detect_line_ending, syntax::{self, LanguageConfiguration}, ChangeSet, Diagnostic, LineEnding, Rope, RopeBuilder, Selection, Syntax, Transaction, DEFAULT_LINE_ENDING, }; use crate::editor::{Config, RedrawHandle}; use crate::{DocumentId, Editor, Theme, View, ViewId}; /// 8kB of buffer space for encoding and decoding `Rope`s. const BUF_SIZE: usize = 8192; const DEFAULT_INDENT: IndentStyle = IndentStyle::Tabs; pub const DEFAULT_LANGUAGE_NAME: &str = "text"; pub const SCRATCH_BUFFER_NAME: &str = "[scratch]"; #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] pub enum Mode { Normal = 0, Select = 1, Insert = 2, } 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 { match s { "normal" => Ok(Mode::Normal), "select" => Ok(Mode::Select), "insert" => Ok(Mode::Insert), _ => bail!("Invalid mode '{}'", s), } } } // toml deserializer doesn't seem to recognize string as enum impl<'de> Deserialize<'de> for Mode { fn deserialize(deserializer: D) -> Result where D: Deserializer<'de>, { let s = String::deserialize(deserializer)?; s.parse().map_err(de::Error::custom) } } impl Serialize for Mode { fn serialize(&self, serializer: S) -> Result where S: serde::Serializer, { serializer.collect_str(self) } } /// A snapshot of the text of a document that we want to write out to disk #[derive(Debug, Clone)] pub struct DocumentSavedEvent { pub revision: usize, pub doc_id: DocumentId, pub path: PathBuf, pub text: Rope, } pub type DocumentSavedEventResult = Result; pub type DocumentSavedEventFuture = BoxFuture<'static, DocumentSavedEventResult>; #[derive(Debug)] pub struct SavePoint { /// The view this savepoint is associated with pub view: ViewId, revert: Mutex, pub text: Rope, } impl SavePoint { pub fn cursor(&self) -> usize { // we always create transactions with selections self.revert .lock() .selection() .unwrap() .primary() .cursor(self.text.slice(..)) } } pub struct Document { pub(crate) id: DocumentId, text: Rope, selections: HashMap, /// Inlay hints annotations for the document, by view. /// /// To know if they're up-to-date, check the `id` field in `DocumentInlayHints`. pub(crate) inlay_hints: HashMap, /// Set to `true` when the document is updated, reset to `false` on the next inlay hints /// update from the LSP pub inlay_hints_oudated: bool, path: Option, encoding: &'static encoding::Encoding, has_bom: bool, pub restore_cursor: bool, /// Current indent style. pub indent_style: IndentStyle, /// The document's default line ending. pub line_ending: LineEnding, pub syntax: Option, /// Corresponding language scope name. Usually `source.`. pub language: Option>, /// Pending changes since last history commit. changes: ChangeSet, /// State at last commit. Used for calculating reverts. old_state: Option, /// Undo tree. // It can be used as a cell where we will take it out to get some parts of the history and put // it back as it separated from the edits. We could split out the parts manually but that will // be more troublesome. pub history: Cell, pub config: Arc>, savepoints: Vec>, // Last time we wrote to the file. This will carry the time the file was last opened if there // were no saves. last_saved_time: SystemTime, last_saved_revision: usize, version: i32, // should be usize? pub(crate) modified_since_accessed: bool, diagnostics: Vec, language_server: Option>, diff_handle: Option, version_control_head: Option>>>, // when document was used for most-recent-used buffer picker pub focused_at: std::time::Instant, } /// Inlay hints for a single `(Document, View)` combo. /// /// There are `*_inlay_hints` field for each kind of hints an LSP can send since we offer the /// option to style theme differently in the theme according to the (currently supported) kinds /// (`type`, `parameter` and the rest). /// /// Inlay hints are always `InlineAnnotation`s, not overlays or line-ones: LSP may choose to place /// them anywhere in the text and will sometime offer config options to move them where the user /// wants them but it shouldn't be Helix who decides that so we use the most precise positioning. /// /// The padding for inlay hints needs to be stored separately for before and after (the LSP spec /// uses 'left' and 'right' but not all text is left to right so let's be correct) padding because /// the 'before' padding must be added to a layer *before* the regular inlay hints and the 'after' /// padding comes ... after. #[derive(Debug, Clone)] pub struct DocumentInlayHints { /// Identifier for the inlay hints stored in this structure. To be checked to know if they have /// to be recomputed on idle or not. pub id: DocumentInlayHintsId, /// Inlay hints of `TYPE` kind, if any. pub type_inlay_hints: Rc<[InlineAnnotation]>, /// Inlay hints of `PARAMETER` kind, if any. pub parameter_inlay_hints: Rc<[InlineAnnotation]>, /// Inlay hints that are neither `TYPE` nor `PARAMETER`. /// /// LSPs are not required to associate a kind to their inlay hints, for example Rust-Analyzer /// currently never does (February 2023) and the LSP spec may add new kinds in the future that /// we want to display even if we don't have some special highlighting for them. pub other_inlay_hints: Rc<[InlineAnnotation]>, /// Inlay hint padding. When creating the final `TextAnnotations`, the `before` padding must be /// added first, then the regular inlay hints, then the `after` padding. pub padding_before_inlay_hints: Rc<[InlineAnnotation]>, pub padding_after_inlay_hints: Rc<[InlineAnnotation]>, } impl DocumentInlayHints { /// Generate an empty list of inlay hints with the given ID. pub fn empty_with_id(id: DocumentInlayHintsId) -> Self { Self { id, type_inlay_hints: Rc::new([]), parameter_inlay_hints: Rc::new([]), other_inlay_hints: Rc::new([]), padding_before_inlay_hints: Rc::new([]), padding_after_inlay_hints: Rc::new([]), } } } /// Associated with a [`Document`] and [`ViewId`], uniquely identifies the state of inlay hints for /// for that document and view: if this changed since the last save, the inlay hints for the view /// should be recomputed. /// /// We can't store the `ViewOffset` instead of the first and last asked-for lines because if /// softwrapping changes, the `ViewOffset` may not change while the displayed lines will. #[derive(Copy, Clone, PartialEq, Eq)] pub struct DocumentInlayHintsId { /// First line for which the inlay hints were requested. pub first_line: usize, /// Last line for which the inlay hints were requested. pub last_line: usize, } use std::{fmt, mem}; impl fmt::Debug for Document { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.debug_struct("Document") .field("id", &self.id) .field("text", &self.text) .field("selections", &self.selections) .field("inlay_hints_oudated", &self.inlay_hints_oudated) .field("text_annotations", &self.inlay_hints) .field("path", &self.path) .field("encoding", &self.encoding) .field("restore_cursor", &self.restore_cursor) .field("syntax", &self.syntax) .field("language", &self.language) .field("changes", &self.changes) .field("old_state", &self.old_state) // .field("history", &self.history) .field("last_saved_time", &self.last_saved_time) .field("last_saved_revision", &self.last_saved_revision) .field("version", &self.version) .field("modified_since_accessed", &self.modified_since_accessed) .field("diagnostics", &self.diagnostics) // .field("language_server", &self.language_server) .finish() } } impl fmt::Debug for DocumentInlayHintsId { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { // Much more agreable to read when debugging f.debug_struct("DocumentInlayHintsId") .field("lines", &(self.first_line..self.last_line)) .finish() } } enum Encoder { Utf16Be, Utf16Le, EncodingRs(encoding::Encoder), } impl Encoder { fn from_encoding(encoding: &'static encoding::Encoding) -> Self { if encoding == encoding::UTF_16BE { Self::Utf16Be } else if encoding == encoding::UTF_16LE { Self::Utf16Le } else { Self::EncodingRs(encoding.new_encoder()) } } fn encode_from_utf8( &mut self, src: &str, dst: &mut [u8], is_empty: bool, ) -> (encoding::CoderResult, usize, usize) { if src.is_empty() { return (encoding::CoderResult::InputEmpty, 0, 0); } let mut write_to_buf = |convert: fn(u16) -> [u8; 2]| { let to_write = src.char_indices().map(|(indice, char)| { let mut encoded: [u16; 2] = [0, 0]; ( indice, char.encode_utf16(&mut encoded) .iter_mut() .flat_map(|char| convert(*char)) .collect::>(), ) }); let mut total_written = 0usize; for (indice, utf16_bytes) in to_write { let character_size = utf16_bytes.len(); if dst.len() <= (total_written + character_size) { return (encoding::CoderResult::OutputFull, indice, total_written); } for character in utf16_bytes { dst[total_written] = character; total_written += 1; } } (encoding::CoderResult::InputEmpty, src.len(), total_written) }; match self { Self::Utf16Be => write_to_buf(u16::to_be_bytes), Self::Utf16Le => write_to_buf(u16::to_le_bytes), Self::EncodingRs(encoder) => { let (code_result, read, written, ..) = encoder.encode_from_utf8(src, dst, is_empty); (code_result, read, written) } } } } // Apply BOM if encoding permit it, return the number of bytes written at the start of buf fn apply_bom(encoding: &'static encoding::Encoding, buf: &mut [u8; BUF_SIZE]) -> usize { if encoding == encoding::UTF_8 { buf[0] = 0xef; buf[1] = 0xbb; buf[2] = 0xbf; 3 } else if encoding == encoding::UTF_16BE { buf[0] = 0xfe; buf[1] = 0xff; 2 } else if encoding == encoding::UTF_16LE { buf[0] = 0xff; buf[1] = 0xfe; 2 } else { 0 } } // The documentation and implementation of this function should be up-to-date with // its sibling function, `to_writer()`. // /// Decodes a stream of bytes into UTF-8, returning a `Rope` and the /// encoding it was decoded as with BOM information. The optional `encoding` /// parameter can be used to override encoding auto-detection. pub fn from_reader( reader: &mut R, encoding: Option<&'static Encoding>, ) -> Result<(Rope, &'static Encoding, bool), Error> { // These two buffers are 8192 bytes in size each and are used as // intermediaries during the decoding process. Text read into `buf` // from `reader` is decoded into `buf_out` as UTF-8. Once either // `buf_out` is full or the end of the reader was reached, the // contents are appended to `builder`. let mut buf = [0u8; BUF_SIZE]; let mut buf_out = [0u8; BUF_SIZE]; let mut builder = RopeBuilder::new(); // By default, the encoding of the text is auto-detected by // `encoding_rs` for_bom, and if it fails, from `chardetng` // crate which requires sample data from the reader. // As a manual override to this auto-detection is possible, the // same data is read into `buf` to ensure symmetry in the upcoming // loop. let (encoding, has_bom, mut decoder, mut slice, mut is_empty) = { let read = reader.read(&mut buf)?; let is_empty = read == 0; let (encoding, has_bom) = encoding .map(|encoding| (encoding, false)) .or_else(|| { encoding::Encoding::for_bom(&buf).map(|(encoding, _bom_size)| (encoding, true)) }) .unwrap_or_else(|| { let mut encoding_detector = chardetng::EncodingDetector::new(); encoding_detector.feed(&buf, is_empty); (encoding_detector.guess(None, true), false) }); let decoder = encoding.new_decoder(); // If the amount of bytes read from the reader is less than // `buf.len()`, it is undesirable to read the bytes afterwards. let slice = &buf[..read]; (encoding, has_bom, decoder, slice, is_empty) }; // `RopeBuilder::append()` expects a `&str`, so this is the "real" // output buffer. When decoding, the number of bytes in the output // buffer will often exceed the number of bytes in the input buffer. // The `result` returned by `decode_to_str()` will state whether or // not that happened. The contents of `buf_str` is appended to // `builder` and it is reused for the next iteration of the decoding // loop. // // As it is possible to read less than the buffer's maximum from `read()` // even when the end of the reader has yet to be reached, the end of // the reader is determined only when a `read()` call returns `0`. // // SAFETY: `buf_out` is a zero-initialized array, thus it will always // contain valid UTF-8. let buf_str = unsafe { std::str::from_utf8_unchecked_mut(&mut buf_out[..]) }; let mut total_written = 0usize; loop { let mut total_read = 0usize; // An inner loop is necessary as it is possible that the input buffer // may not be completely decoded on the first `decode_to_str()` call // which would happen in cases where the output buffer is filled to // capacity. loop { let (result, read, written, ..) = decoder.decode_to_str( &slice[total_read..], &mut buf_str[total_written..], is_empty, ); // These variables act as the read and write cursors of `buf` and `buf_str` respectively. // They are necessary in case the output buffer fills before decoding of the entire input // loop is complete. Otherwise, the loop would endlessly iterate over the same `buf` and // the data inside the output buffer would be overwritten. total_read += read; total_written += written; match result { encoding::CoderResult::InputEmpty => { debug_assert_eq!(slice.len(), total_read); break; } encoding::CoderResult::OutputFull => { debug_assert!(slice.len() > total_read); builder.append(&buf_str[..total_written]); total_written = 0; } } } // Once the end of the stream is reached, the output buffer is // flushed and the loop terminates. if is_empty { debug_assert_eq!(reader.read(&mut buf)?, 0); builder.append(&buf_str[..total_written]); break; } // Once the previous input has been processed and decoded, the next set of // data is fetched from the reader. The end of the reader is determined to // be when exactly `0` bytes were read from the reader, as per the invariants // of the `Read` trait. let read = reader.read(&mut buf)?; slice = &buf[..read]; is_empty = read == 0; } let rope = builder.finish(); Ok((rope, encoding, has_bom)) } // The documentation and implementation of this function should be up-to-date with // its sibling function, `from_reader()`. // /// Encodes the text inside `rope` into the given `encoding` and writes the /// encoded output into `writer.` As a `Rope` can only contain valid UTF-8, /// replacement characters may appear in the encoded text. pub async fn to_writer<'a, W: tokio::io::AsyncWriteExt + Unpin + ?Sized>( writer: &'a mut W, encoding_with_bom_info: (&'static Encoding, bool), rope: &'a Rope, ) -> Result<(), Error> { // Text inside a `Rope` is stored as non-contiguous blocks of data called // chunks. The absolute size of each chunk is unknown, thus it is impossible // to predict the end of the chunk iterator ahead of time. Instead, it is // determined by filtering the iterator to remove all empty chunks and then // appending an empty chunk to it. This is valuable for detecting when all // chunks in the `Rope` have been iterated over in the subsequent loop. let (encoding, has_bom) = encoding_with_bom_info; let iter = rope .chunks() .filter(|c| !c.is_empty()) .chain(std::iter::once("")); let mut buf = [0u8; BUF_SIZE]; let mut total_written = if has_bom { apply_bom(encoding, &mut buf) } else { 0 }; let mut encoder = Encoder::from_encoding(encoding); for chunk in iter { let is_empty = chunk.is_empty(); let mut total_read = 0usize; // An inner loop is necessary as it is possible that the input buffer // may not be completely encoded on the first `encode_from_utf8()` call // which would happen in cases where the output buffer is filled to // capacity. loop { let (result, read, written, ..) = encoder.encode_from_utf8(&chunk[total_read..], &mut buf[total_written..], is_empty); // These variables act as the read and write cursors of `chunk` and `buf` respectively. // They are necessary in case the output buffer fills before encoding of the entire input // loop is complete. Otherwise, the loop would endlessly iterate over the same `chunk` and // the data inside the output buffer would be overwritten. total_read += read; total_written += written; match result { encoding::CoderResult::InputEmpty => { debug_assert_eq!(chunk.len(), total_read); debug_assert!(buf.len() >= total_written); break; } encoding::CoderResult::OutputFull => { debug_assert!(chunk.len() > total_read); writer.write_all(&buf[..total_written]).await?; total_written = 0; } } } // Once the end of the iterator is reached, the output buffer is // flushed and the outer loop terminates. if is_empty { writer.write_all(&buf[..total_written]).await?; writer.flush().await?; break; } } Ok(()) } fn take_with(mut_ref: &mut T, f: F) where T: Default, F: FnOnce(T) -> T, { *mut_ref = f(mem::take(mut_ref)); } use helix_lsp::lsp; use url::Url; impl Document { pub fn from( text: Rope, encoding_with_bom_info: Option<(&'static Encoding, bool)>, config: Arc>, ) -> Self { let (encoding, has_bom) = encoding_with_bom_info.unwrap_or((encoding::UTF_8, false)); let changes = ChangeSet::new(&text); let old_state = None; Self { id: DocumentId::default(), path: None, encoding, has_bom, text, selections: HashMap::default(), inlay_hints: HashMap::default(), inlay_hints_oudated: false, indent_style: DEFAULT_INDENT, line_ending: DEFAULT_LINE_ENDING, restore_cursor: false, syntax: None, language: None, changes, old_state, diagnostics: Vec::new(), version: 0, history: Cell::new(History::default()), savepoints: Vec::new(), last_saved_time: SystemTime::now(), last_saved_revision: 0, modified_since_accessed: false, language_server: None, diff_handle: None, config, version_control_head: None, focused_at: std::time::Instant::now(), } } pub fn default(config: Arc>) -> Self { let text = Rope::from(DEFAULT_LINE_ENDING.as_str()); Self::from(text, None, config) } // TODO: async fn? /// Create a new document from `path`. Encoding is auto-detected, but it can be manually /// overwritten with the `encoding` parameter. pub fn open( path: &Path, encoding: Option<&'static Encoding>, config_loader: Option>, config: Arc>, ) -> Result { // Open the file if it exists, otherwise assume it is a new file (and thus empty). let (rope, encoding, has_bom) = if path.exists() { let mut file = std::fs::File::open(path).context(format!("unable to open {:?}", path))?; from_reader(&mut file, encoding)? } else { let encoding = encoding.unwrap_or(encoding::UTF_8); (Rope::from(DEFAULT_LINE_ENDING.as_str()), encoding, false) }; let mut doc = Self::from(rope, Some((encoding, has_bom)), config); // set the path and try detecting the language doc.set_path(Some(path))?; if let Some(loader) = config_loader { doc.detect_language(loader); } doc.detect_indent_and_line_ending(); Ok(doc) } /// The same as [`format`], but only returns formatting changes if auto-formatting /// is configured. pub fn auto_format(&self) -> Option>> { if self.language_config()?.auto_format { self.format() } else { None } } /// If supported, returns the changes that should be applied to this document in order /// to format it nicely. // We can't use anyhow::Result here since the output of the future has to be // clonable to be used as shared future. So use a custom error type. pub fn format(&self) -> Option>> { if let Some(formatter) = self .language_config() .and_then(|c| c.formatter.clone()) .filter(|formatter| which::which(&formatter.command).is_ok()) { use std::process::Stdio; let text = self.text().clone(); let mut process = tokio::process::Command::new(&formatter.command); process .args(&formatter.args) .stdin(Stdio::piped()) .stdout(Stdio::piped()) .stderr(Stdio::piped()); let formatting_future = async move { let mut process = process .spawn() .map_err(|e| FormatterError::SpawningFailed { command: formatter.command.clone(), error: e.kind(), })?; { let mut stdin = process.stdin.take().ok_or(FormatterError::BrokenStdin)?; to_writer(&mut stdin, (encoding::UTF_8, false), &text) .await .map_err(|_| FormatterError::BrokenStdin)?; } let output = process .wait_with_output() .await .map_err(|_| FormatterError::WaitForOutputFailed)?; if !output.status.success() { if !output.stderr.is_empty() { let err = String::from_utf8_lossy(&output.stderr).to_string(); log::error!("Formatter error: {}", err); return Err(FormatterError::NonZeroExitStatus(Some(err))); } return Err(FormatterError::NonZeroExitStatus(None)); } else if !output.stderr.is_empty() { log::debug!( "Formatter printed to stderr: {}", String::from_utf8_lossy(&output.stderr).to_string() ); } let str = std::str::from_utf8(&output.stdout) .map_err(|_| FormatterError::InvalidUtf8Output)?; Ok(helix_core::diff::compare_ropes(&text, &Rope::from(str))) }; return Some(formatting_future.boxed()); }; let language_server = self.language_server()?; let text = self.text.clone(); let offset_encoding = language_server.offset_encoding(); let request = language_server.text_document_formatting( self.identifier(), lsp::FormattingOptions { tab_size: self.tab_width() as u32, insert_spaces: matches!(self.indent_style, IndentStyle::Spaces(_)), ..Default::default() }, None, )?; let fut = async move { let edits = request.await.unwrap_or_else(|e| { log::warn!("LSP formatting failed: {}", e); Default::default() }); Ok(helix_lsp::util::generate_transaction_from_edits( &text, edits, offset_encoding, )) }; Some(fut.boxed()) } pub fn save>( &mut self, path: Option

, force: bool, ) -> Result< impl Future> + 'static + Send, anyhow::Error, > { let path = path.map(|path| path.into()); self.save_impl(path, force) // futures_util::future::Ready<_>, } /// The `Document`'s text is encoded according to its encoding and written to the file located /// at its `path()`. fn save_impl( &mut self, path: Option, force: bool, ) -> Result< impl Future> + 'static + Send, anyhow::Error, > { log::debug!( "submitting save of doc '{:?}'", self.path().map(|path| path.to_string_lossy()) ); // we clone and move text + path into the future so that we asynchronously save the current // state without blocking any further edits. let text = self.text().clone(); let path = match path { Some(path) => helix_core::path::get_canonicalized_path(&path)?, None => { if self.path.is_none() { bail!("Can't save with no path set!"); } self.path.as_ref().unwrap().clone() } }; let identifier = self.path().map(|_| self.identifier()); let language_server = self.language_server.clone(); // mark changes up to now as saved let current_rev = self.get_current_revision(); let doc_id = self.id(); let encoding_with_bom_info = (self.encoding, self.has_bom); let last_saved_time = self.last_saved_time; // We encode the file according to the `Document`'s encoding. let future = async move { use tokio::{fs, fs::File}; if let Some(parent) = path.parent() { // TODO: display a prompt asking the user if the directories should be created if !parent.exists() { if force { std::fs::DirBuilder::new().recursive(true).create(parent)?; } else { bail!("can't save file, parent directory does not exist (use :w! to create it)"); } } } // Protect against overwriting changes made externally if !force { if let Ok(metadata) = fs::metadata(&path).await { if let Ok(mtime) = metadata.modified() { if last_saved_time < mtime { bail!("file modified by an external process, use :w! to overwrite"); } } } } let mut file = File::create(&path).await?; to_writer(&mut file, encoding_with_bom_info, &text).await?; let event = DocumentSavedEvent { revision: current_rev, doc_id, path, text: text.clone(), }; if let Some(language_server) = language_server { if !language_server.is_initialized() { return Ok(event); } if let Some(identifier) = identifier { if let Some(notification) = language_server.text_document_did_save(identifier, &text) { notification.await?; } } } Ok(event) }; Ok(future) } /// Detect the programming language based on the file type. pub fn detect_language(&mut self, config_loader: Arc) { self.set_language( self.detect_language_config(&config_loader), Some(config_loader), ); } /// Detect the programming language based on the file type. pub fn detect_language_config( &self, config_loader: &syntax::Loader, ) -> Option> { config_loader .language_config_for_file_name(self.path.as_ref()?) .or_else(|| config_loader.language_config_for_shebang(self.text())) } /// Detect the indentation used in the file, or otherwise defaults to the language indentation /// configured in `languages.toml`, with a fallback to tabs if it isn't specified. Line ending /// is likewise auto-detected, and will fallback to the default OS line ending. pub fn detect_indent_and_line_ending(&mut self) { self.indent_style = auto_detect_indent_style(&self.text).unwrap_or_else(|| { self.language_config() .and_then(|config| config.indent.as_ref()) .map_or(DEFAULT_INDENT, |config| IndentStyle::from_str(&config.unit)) }); self.line_ending = auto_detect_line_ending(&self.text).unwrap_or(DEFAULT_LINE_ENDING); } /// Reload the document from its path. pub fn reload( &mut self, view: &mut View, provider_registry: &DiffProviderRegistry, redraw_handle: RedrawHandle, ) -> Result<(), Error> { let encoding = self.encoding; let path = self .path() .filter(|path| path.exists()) .ok_or_else(|| anyhow!("can't find file to reload from {:?}", self.display_name()))? .to_owned(); let mut file = std::fs::File::open(&path)?; let (rope, ..) = from_reader(&mut file, Some(encoding))?; // Calculate the difference between the buffer and source text, and apply it. // This is not considered a modification of the contents of the file regardless // of the encoding. let transaction = helix_core::diff::compare_ropes(self.text(), &rope); self.apply(&transaction, view.id); self.append_changes_to_history(view); self.reset_modified(); self.last_saved_time = SystemTime::now(); self.detect_indent_and_line_ending(); match provider_registry.get_diff_base(&path) { Some(diff_base) => self.set_diff_base(diff_base, redraw_handle), None => self.diff_handle = None, } self.version_control_head = provider_registry.get_current_head_name(&path); Ok(()) } /// Sets the [`Document`]'s encoding with the encoding correspondent to `label`. pub fn set_encoding(&mut self, label: &str) -> Result<(), Error> { let encoding = Encoding::for_label(label.as_bytes()).ok_or_else(|| anyhow!("unknown encoding"))?; self.encoding = encoding; Ok(()) } /// Returns the [`Document`]'s current encoding. pub fn encoding(&self) -> &'static Encoding { self.encoding } pub fn set_path(&mut self, path: Option<&Path>) -> Result<(), std::io::Error> { let path = path .map(helix_core::path::get_canonicalized_path) .transpose()?; // if parent doesn't exist we still want to open the document // and error out when document is saved self.path = path; Ok(()) } /// Set the programming language for the file and load associated data (e.g. highlighting) /// if it exists. pub fn set_language( &mut self, language_config: Option>, loader: Option>, ) { if let (Some(language_config), Some(loader)) = (language_config, loader) { if let Some(highlight_config) = language_config.highlight_config(&loader.scopes()) { self.syntax = Syntax::new(&self.text, highlight_config, loader); } self.language = Some(language_config); } else { self.syntax = None; self.language = None; }; } /// Set the programming language for the file if you know the name (scope) but don't have the /// [`syntax::LanguageConfiguration`] for it. pub fn set_language2(&mut self, scope: &str, config_loader: Arc) { let language_config = config_loader.language_config_for_scope(scope); self.set_language(language_config, Some(config_loader)); } /// Set the programming language for the file if you know the language but don't have the /// [`syntax::LanguageConfiguration`] for it. pub fn set_language_by_language_id( &mut self, language_id: &str, config_loader: Arc, ) -> anyhow::Result<()> { let language_config = config_loader .language_config_for_language_id(language_id) .ok_or_else(|| anyhow!("invalid language id: {}", language_id))?; self.set_language(Some(language_config), Some(config_loader)); Ok(()) } /// Set the LSP. pub fn set_language_server(&mut self, language_server: Option>) { self.language_server = language_server; } /// Select text within the [`Document`]. pub fn set_selection(&mut self, view_id: ViewId, selection: Selection) { // TODO: use a transaction? self.selections .insert(view_id, selection.ensure_invariants(self.text().slice(..))); } /// Find the origin selection of the text in a document, i.e. where /// a single cursor would go if it were on the first grapheme. If /// the text is empty, returns (0, 0). pub fn origin(&self) -> Range { if self.text().len_chars() == 0 { return Range::new(0, 0); } Range::new(0, 1).grapheme_aligned(self.text().slice(..)) } /// Reset the view's selection on this document to the /// [origin](Document::origin) cursor. pub fn reset_selection(&mut self, view_id: ViewId) { let origin = self.origin(); self.set_selection(view_id, Selection::single(origin.anchor, origin.head)); } /// Initializes a new selection for the given view if it does not /// already have one. pub fn ensure_view_init(&mut self, view_id: ViewId) { if self.selections.get(&view_id).is_none() { self.reset_selection(view_id); } } /// Mark document as recent used for MRU sorting pub fn mark_as_focused(&mut self) { self.focused_at = std::time::Instant::now(); } /// Remove a view's selection and inlay hints from this document. pub fn remove_view(&mut self, view_id: ViewId) { self.selections.remove(&view_id); self.inlay_hints.remove(&view_id); } /// Apply a [`Transaction`] to the [`Document`] to change its text. fn apply_impl( &mut self, transaction: &Transaction, view_id: ViewId, emit_lsp_notification: bool, ) -> bool { use helix_core::Assoc; let old_doc = self.text().clone(); let success = transaction.changes().apply(&mut self.text); if success { for selection in self.selections.values_mut() { *selection = selection .clone() // Map through changes .map(transaction.changes()) // Ensure all selections across all views still adhere to invariants. .ensure_invariants(self.text.slice(..)); } // if specified, the current selection should instead be replaced by transaction.selection if let Some(selection) = transaction.selection() { self.selections.insert( view_id, selection.clone().ensure_invariants(self.text.slice(..)), ); } self.modified_since_accessed = true; } if !transaction.changes().is_empty() { self.version += 1; // start computing the diff in parallel if let Some(diff_handle) = &self.diff_handle { diff_handle.update_document(self.text.clone(), false); } // generate revert to savepoint if !self.savepoints.is_empty() { let revert = transaction.invert(&old_doc); self.savepoints .retain_mut(|save_point| match save_point.upgrade() { Some(savepoint) => { let mut revert_to_savepoint = savepoint.revert.lock(); *revert_to_savepoint = revert.clone().compose(mem::take(&mut revert_to_savepoint)); true } None => false, }) } // update tree-sitter syntax tree if let Some(syntax) = &mut self.syntax { // TODO: no unwrap let res = syntax.update(&old_doc, &self.text, transaction.changes()); if res.is_err() { log::error!("TS parser failed, disabeling TS for the current buffer: {res:?}"); self.syntax = None; } } let changes = transaction.changes(); // map state.diagnostics over changes::map_pos too for diagnostic in &mut self.diagnostics { diagnostic.range.start = changes.map_pos(diagnostic.range.start, Assoc::After); diagnostic.range.end = changes.map_pos(diagnostic.range.end, Assoc::After); diagnostic.line = self.text.char_to_line(diagnostic.range.start); } self.diagnostics .sort_unstable_by_key(|diagnostic| diagnostic.range); // Update the inlay hint annotations' positions, helping ensure they are displayed in the proper place let apply_inlay_hint_changes = |annotations: &mut Rc<[InlineAnnotation]>| { if let Some(data) = Rc::get_mut(annotations) { for inline in data.iter_mut() { inline.char_idx = changes.map_pos(inline.char_idx, Assoc::After); } } }; self.inlay_hints_oudated = true; for text_annotation in self.inlay_hints.values_mut() { let DocumentInlayHints { id: _, type_inlay_hints, parameter_inlay_hints, other_inlay_hints, padding_before_inlay_hints, padding_after_inlay_hints, } = text_annotation; apply_inlay_hint_changes(padding_before_inlay_hints); apply_inlay_hint_changes(type_inlay_hints); apply_inlay_hint_changes(parameter_inlay_hints); apply_inlay_hint_changes(other_inlay_hints); apply_inlay_hint_changes(padding_after_inlay_hints); } if emit_lsp_notification { // emit lsp notification if let Some(language_server) = self.language_server() { let notify = language_server.text_document_did_change( self.versioned_identifier(), &old_doc, self.text(), changes, ); if let Some(notify) = notify { tokio::spawn(notify); } } } } success } fn apply_inner( &mut self, transaction: &Transaction, view_id: ViewId, emit_lsp_notification: bool, ) -> bool { // store the state just before any changes are made. This allows us to undo to the // state just before a transaction was applied. if self.changes.is_empty() && !transaction.changes().is_empty() { self.old_state = Some(State { doc: self.text.clone(), selection: self.selection(view_id).clone(), }); } let success = self.apply_impl(transaction, view_id, emit_lsp_notification); if !transaction.changes().is_empty() { // Compose this transaction with the previous one take_with(&mut self.changes, |changes| { changes.compose(transaction.changes().clone()) }); } success } /// Apply a [`Transaction`] to the [`Document`] to change its text. pub fn apply(&mut self, transaction: &Transaction, view_id: ViewId) -> bool { self.apply_inner(transaction, view_id, true) } /// Apply a [`Transaction`] to the [`Document`] to change its text /// without notifying the language servers. This is useful for temporary transactions /// that must not influence the server. pub fn apply_temporary(&mut self, transaction: &Transaction, view_id: ViewId) -> bool { self.apply_inner(transaction, view_id, false) } fn undo_redo_impl(&mut self, view: &mut View, undo: bool) -> bool { let mut history = self.history.take(); let txn = if undo { history.undo() } else { history.redo() }; let success = if let Some(txn) = txn { self.apply_impl(txn, view.id, true) } else { false }; self.history.set(history); if success { // reset changeset to fix len self.changes = ChangeSet::new(self.text()); // Sync with changes with the jumplist selections. view.sync_changes(self); } success } /// Undo the last modification to the [`Document`]. Returns whether the undo was successful. pub fn undo(&mut self, view: &mut View) -> bool { self.undo_redo_impl(view, true) } /// Redo the last modification to the [`Document`]. Returns whether the redo was successful. pub fn redo(&mut self, view: &mut View) -> bool { self.undo_redo_impl(view, false) } /// Creates a reference counted snapshot (called savpepoint) of the document. /// /// The snapshot will remain valid (and updated) idenfinitly as long as ereferences to it exist. /// Restoring the snapshot will restore the selection and the contents of the document to /// the state it had when this function was called. pub fn savepoint(&mut self, view: &View) -> Arc { let revert = Transaction::new(self.text()).with_selection(self.selection(view.id).clone()); // check if there is already an existing (identical) savepoint around if let Some(savepoint) = self .savepoints .iter() .rev() .find_map(|savepoint| savepoint.upgrade()) { let transaction = savepoint.revert.lock(); if savepoint.view == view.id && transaction.changes().is_empty() && transaction.selection() == revert.selection() { drop(transaction); return savepoint; } } let savepoint = Arc::new(SavePoint { view: view.id, revert: Mutex::new(revert), text: self.text.clone(), }); self.savepoints.push(Arc::downgrade(&savepoint)); savepoint } pub fn restore(&mut self, view: &mut View, savepoint: &SavePoint, emit_lsp_notification: bool) { assert_eq!( savepoint.view, view.id, "Savepoint must not be used with a different view!" ); // search and remove savepoint using a ptr comparison // this avoids a deadlock as we need to lock the mutex let savepoint_idx = self .savepoints .iter() .position(|savepoint_ref| savepoint_ref.as_ptr() == savepoint as *const _) .expect("Savepoint must belong to this document"); let savepoint_ref = self.savepoints.remove(savepoint_idx); let mut revert = savepoint.revert.lock(); self.apply_inner(&revert, view.id, emit_lsp_notification); *revert = Transaction::new(self.text()).with_selection(self.selection(view.id).clone()); self.savepoints.push(savepoint_ref) } fn earlier_later_impl(&mut self, view: &mut View, uk: UndoKind, earlier: bool) -> bool { let txns = if earlier { self.history.get_mut().earlier(uk) } else { self.history.get_mut().later(uk) }; let mut success = false; for txn in txns { if self.apply_impl(&txn, view.id, true) { success = true; } } if success { // reset changeset to fix len self.changes = ChangeSet::new(self.text()); // Sync with changes with the jumplist selections. view.sync_changes(self); } success } /// Undo modifications to the [`Document`] according to `uk`. pub fn earlier(&mut self, view: &mut View, uk: UndoKind) -> bool { self.earlier_later_impl(view, uk, true) } /// Redo modifications to the [`Document`] according to `uk`. pub fn later(&mut self, view: &mut View, uk: UndoKind) -> bool { self.earlier_later_impl(view, uk, false) } /// Commit pending changes to history pub fn append_changes_to_history(&mut self, view: &mut View) { if self.changes.is_empty() { return; } let new_changeset = ChangeSet::new(self.text()); let changes = std::mem::replace(&mut self.changes, new_changeset); // Instead of doing this messy merge we could always commit, and based on transaction // annotations either add a new layer or compose into the previous one. let transaction = Transaction::from(changes).with_selection(self.selection(view.id).clone()); // HAXX: we need to reconstruct the state as it was before the changes.. let old_state = self.old_state.take().expect("no old_state available"); let mut history = self.history.take(); history.commit_revision(&transaction, &old_state); self.history.set(history); // Update jumplist entries in the view. view.apply(&transaction, self); } pub fn id(&self) -> DocumentId { self.id } /// If there are unsaved modifications. pub fn is_modified(&self) -> bool { let history = self.history.take(); let current_revision = history.current_revision(); self.history.set(history); log::debug!( "id {} modified - last saved: {}, current: {}", self.id, self.last_saved_revision, current_revision ); current_revision != self.last_saved_revision || !self.changes.is_empty() } /// Save modifications to history, and so [`Self::is_modified`] will return false. pub fn reset_modified(&mut self) { let history = self.history.take(); let current_revision = history.current_revision(); self.history.set(history); self.last_saved_revision = current_revision; } /// Set the document's latest saved revision to the given one. pub fn set_last_saved_revision(&mut self, rev: usize) { log::debug!( "doc {} revision updated {} -> {}", self.id, self.last_saved_revision, rev ); self.last_saved_revision = rev; self.last_saved_time = SystemTime::now(); } /// Get the document's latest saved revision. pub fn get_last_saved_revision(&mut self) -> usize { self.last_saved_revision } /// Get the current revision number pub fn get_current_revision(&mut self) -> usize { let history = self.history.take(); let current_revision = history.current_revision(); self.history.set(history); current_revision } /// Corresponding language scope name. Usually `source.`. pub fn language_scope(&self) -> Option<&str> { self.language .as_ref() .map(|language| language.scope.as_str()) } /// Language name for the document. Corresponds to the `name` key in /// `languages.toml` configuration. pub fn language_name(&self) -> Option<&str> { self.language .as_ref() .map(|language| language.language_id.as_str()) } /// Language ID for the document. Either the `language-id` from the /// `language-server` configuration, or the document language if no /// `language-id` has been specified. pub fn language_id(&self) -> Option<&str> { let language_config = self.language.as_deref()?; language_config .language_server .as_ref()? .language_id .as_deref() .or(Some(language_config.language_id.as_str())) } /// Corresponding [`LanguageConfiguration`]. pub fn language_config(&self) -> Option<&LanguageConfiguration> { self.language.as_deref() } /// Current document version, incremented at each change. pub fn version(&self) -> i32 { self.version } /// Language server if it has been initialized. pub fn language_server(&self) -> Option<&helix_lsp::Client> { let server = self.language_server.as_deref()?; server.is_initialized().then_some(server) } pub fn diff_handle(&self) -> Option<&DiffHandle> { self.diff_handle.as_ref() } /// Intialize/updates the differ for this document with a new base. pub fn set_diff_base(&mut self, diff_base: Vec, redraw_handle: RedrawHandle) { if let Ok((diff_base, ..)) = from_reader(&mut diff_base.as_slice(), Some(self.encoding)) { if let Some(differ) = &self.diff_handle { differ.update_diff_base(diff_base); return; } self.diff_handle = Some(DiffHandle::new(diff_base, self.text.clone(), redraw_handle)) } else { self.diff_handle = None; } } pub fn version_control_head(&self) -> Option>> { self.version_control_head.as_ref().map(|a| a.load_full()) } pub fn set_version_control_head( &mut self, version_control_head: Option>>>, ) { self.version_control_head = version_control_head; } #[inline] /// Tree-sitter AST tree pub fn syntax(&self) -> Option<&Syntax> { self.syntax.as_ref() } /// The width that the tab character is rendered at pub fn tab_width(&self) -> usize { self.language_config() .and_then(|config| config.indent.as_ref()) .map_or(4, |config| config.tab_width) // fallback to 4 columns } // The width (in spaces) of a level of indentation. pub fn indent_width(&self) -> usize { self.indent_style.indent_width(self.tab_width()) } pub fn changes(&self) -> &ChangeSet { &self.changes } #[inline] /// File path on disk. pub fn path(&self) -> Option<&PathBuf> { self.path.as_ref() } /// File path as a URL. pub fn url(&self) -> Option { Url::from_file_path(self.path()?).ok() } #[inline] pub fn text(&self) -> &Rope { &self.text } #[inline] pub fn selection(&self, view_id: ViewId) -> &Selection { &self.selections[&view_id] } #[inline] pub fn selections(&self) -> &HashMap { &self.selections } pub fn relative_path(&self) -> Option { self.path .as_deref() .map(helix_core::path::get_relative_path) } pub fn display_name(&self) -> Cow<'static, str> { self.relative_path() .map(|path| path.to_string_lossy().to_string().into()) .unwrap_or_else(|| SCRATCH_BUFFER_NAME.into()) } // transact(Fn) ? // -- LSP methods #[inline] pub fn identifier(&self) -> lsp::TextDocumentIdentifier { lsp::TextDocumentIdentifier::new(self.url().unwrap()) } pub fn versioned_identifier(&self) -> lsp::VersionedTextDocumentIdentifier { lsp::VersionedTextDocumentIdentifier::new(self.url().unwrap(), self.version) } pub fn position( &self, view_id: ViewId, offset_encoding: helix_lsp::OffsetEncoding, ) -> lsp::Position { let text = self.text(); helix_lsp::util::pos_to_lsp_pos( text, self.selection(view_id).primary().cursor(text.slice(..)), offset_encoding, ) } #[inline] pub fn diagnostics(&self) -> &[Diagnostic] { &self.diagnostics } pub fn set_diagnostics(&mut self, diagnostics: Vec) { self.diagnostics = diagnostics; self.diagnostics .sort_unstable_by_key(|diagnostic| diagnostic.range); } /// Get the document's auto pairs. If the document has a recognized /// language config with auto pairs configured, returns that; /// otherwise, falls back to the global auto pairs config. If the global /// config is false, then ignore language settings. pub fn auto_pairs<'a>(&'a self, editor: &'a Editor) -> Option<&'a AutoPairs> { let global_config = (editor.auto_pairs).as_ref(); // NOTE: If the user specifies the global auto pairs config as false, then // we want to disable it globally regardless of language settings #[allow(clippy::question_mark)] { if global_config.is_none() { return None; } } match &self.language { Some(lang) => lang.as_ref().auto_pairs.as_ref().or(global_config), None => global_config, } } pub fn text_format(&self, mut viewport_width: u16, theme: Option<&Theme>) -> TextFormat { let config = self.config.load(); let text_width = self .language_config() .and_then(|config| config.text_width) .unwrap_or(config.text_width); let soft_wrap_at_text_width = self .language_config() .and_then(|config| { config .soft_wrap .as_ref() .and_then(|soft_wrap| soft_wrap.wrap_at_text_width) }) .or(config.soft_wrap.wrap_at_text_width) .unwrap_or(false); if soft_wrap_at_text_width { // We increase max_line_len by 1 because softwrap considers the newline character // as part of the line length while the "typical" expectation is that this is not the case. // In particular other commands like :reflow do not count the line terminator. // This is technically inconsistent for the last line as that line never has a line terminator // but having the last visual line exceed the width by 1 seems like a rare edge case. viewport_width = viewport_width.min(text_width as u16 + 1) } let config = self.config.load(); let editor_soft_wrap = &config.soft_wrap; let language_soft_wrap = self .language .as_ref() .and_then(|config| config.soft_wrap.as_ref()); let enable_soft_wrap = language_soft_wrap .and_then(|soft_wrap| soft_wrap.enable) .or(editor_soft_wrap.enable) .unwrap_or(false); let max_wrap = language_soft_wrap .and_then(|soft_wrap| soft_wrap.max_wrap) .or(config.soft_wrap.max_wrap) .unwrap_or(20); let max_indent_retain = language_soft_wrap .and_then(|soft_wrap| soft_wrap.max_indent_retain) .or(editor_soft_wrap.max_indent_retain) .unwrap_or(40); let wrap_indicator = language_soft_wrap .and_then(|soft_wrap| soft_wrap.wrap_indicator.clone()) .or_else(|| config.soft_wrap.wrap_indicator.clone()) .unwrap_or_else(|| "↪ ".into()); let tab_width = self.tab_width() as u16; TextFormat { soft_wrap: enable_soft_wrap && viewport_width > 10, tab_width, max_wrap: max_wrap.min(viewport_width / 4), max_indent_retain: max_indent_retain.min(viewport_width * 2 / 5), // avoid spinning forever when the window manager // sets the size to something tiny viewport_width, wrap_indicator: wrap_indicator.into_boxed_str(), wrap_indicator_highlight: theme .and_then(|theme| theme.find_scope_index("ui.virtual.wrap")) .map(Highlight), } } /// Get the text annotations that apply to the whole document, those that do not apply to any /// specific view. pub fn text_annotations(&self, _theme: Option<&Theme>) -> TextAnnotations { TextAnnotations::default() } /// Set the inlay hints for this document and `view_id`. pub fn set_inlay_hints(&mut self, view_id: ViewId, inlay_hints: DocumentInlayHints) { self.inlay_hints.insert(view_id, inlay_hints); } /// Get the inlay hints for this document and `view_id`. pub fn inlay_hints(&self, view_id: ViewId) -> Option<&DocumentInlayHints> { self.inlay_hints.get(&view_id) } /// Completely removes all the inlay hints saved for the document, dropping them to free memory /// (since it often means inlay hints have been fully deactivated). pub fn reset_all_inlay_hints(&mut self) { self.inlay_hints = Default::default(); } } #[derive(Clone, Debug)] pub enum FormatterError { SpawningFailed { command: String, error: std::io::ErrorKind, }, BrokenStdin, WaitForOutputFailed, InvalidUtf8Output, DiskReloadError(String), NonZeroExitStatus(Option), } impl std::error::Error for FormatterError {} impl Display for FormatterError { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { Self::SpawningFailed { command, error } => { write!(f, "Failed to spawn formatter {}: {:?}", command, error) } Self::BrokenStdin => write!(f, "Could not write to formatter stdin"), Self::WaitForOutputFailed => write!(f, "Waiting for formatter output failed"), Self::InvalidUtf8Output => write!(f, "Invalid UTF-8 formatter output"), Self::DiskReloadError(error) => write!(f, "Error reloading file from disk: {}", error), Self::NonZeroExitStatus(Some(output)) => write!(f, "Formatter error: {}", output), Self::NonZeroExitStatus(None) => { write!(f, "Formatter exited with non zero exit status") } } } } #[cfg(test)] mod test { use arc_swap::ArcSwap; use super::*; #[test] fn changeset_to_changes_ignore_line_endings() { use helix_lsp::{lsp, Client, OffsetEncoding}; let text = Rope::from("hello\r\nworld"); let mut doc = Document::from( text, None, Arc::new(ArcSwap::new(Arc::new(Config::default()))), ); let view = ViewId::default(); doc.set_selection(view, Selection::single(0, 0)); let transaction = Transaction::change(doc.text(), vec![(5, 7, Some("\n".into()))].into_iter()); let old_doc = doc.text().clone(); doc.apply(&transaction, view); let changes = Client::changeset_to_changes( &old_doc, doc.text(), transaction.changes(), OffsetEncoding::Utf8, ); assert_eq!(doc.text(), "hello\nworld"); assert_eq!( changes, &[lsp::TextDocumentContentChangeEvent { range: Some(lsp::Range::new( lsp::Position::new(0, 5), lsp::Position::new(1, 0) )), text: "\n".into(), range_length: None, }] ); } #[test] fn changeset_to_changes() { use helix_lsp::{lsp, Client, OffsetEncoding}; let text = Rope::from("hello"); let mut doc = Document::from( text, None, Arc::new(ArcSwap::new(Arc::new(Config::default()))), ); let view = ViewId::default(); doc.set_selection(view, Selection::single(5, 5)); // insert let transaction = Transaction::insert(doc.text(), doc.selection(view), " world".into()); let old_doc = doc.text().clone(); doc.apply(&transaction, view); let changes = Client::changeset_to_changes( &old_doc, doc.text(), transaction.changes(), OffsetEncoding::Utf8, ); assert_eq!( changes, &[lsp::TextDocumentContentChangeEvent { range: Some(lsp::Range::new( lsp::Position::new(0, 5), lsp::Position::new(0, 5) )), text: " world".into(), range_length: None, }] ); // delete let transaction = transaction.invert(&old_doc); let old_doc = doc.text().clone(); doc.apply(&transaction, view); let changes = Client::changeset_to_changes( &old_doc, doc.text(), transaction.changes(), OffsetEncoding::Utf8, ); // line: 0-based. // col: 0-based, gaps between chars. // 0 1 2 3 4 5 6 7 8 9 0 1 // |h|e|l|l|o| |w|o|r|l|d| // ------------- // (0, 5)-(0, 11) assert_eq!( changes, &[lsp::TextDocumentContentChangeEvent { range: Some(lsp::Range::new( lsp::Position::new(0, 5), lsp::Position::new(0, 11) )), text: "".into(), range_length: None, }] ); // replace // also tests that changes are layered, positions depend on previous changes. doc.set_selection(view, Selection::single(0, 5)); let transaction = Transaction::change( doc.text(), vec![(0, 2, Some("aei".into())), (3, 5, Some("ou".into()))].into_iter(), ); // aeilou let old_doc = doc.text().clone(); doc.apply(&transaction, view); let changes = Client::changeset_to_changes( &old_doc, doc.text(), transaction.changes(), OffsetEncoding::Utf8, ); assert_eq!( changes, &[ // 0 1 2 3 4 5 // |h|e|l|l|o| // ---- // // aeillo lsp::TextDocumentContentChangeEvent { range: Some(lsp::Range::new( lsp::Position::new(0, 0), lsp::Position::new(0, 2) )), text: "aei".into(), range_length: None, }, // 0 1 2 3 4 5 6 // |a|e|i|l|l|o| // ----- // // aeilou lsp::TextDocumentContentChangeEvent { range: Some(lsp::Range::new( lsp::Position::new(0, 4), lsp::Position::new(0, 6) )), text: "ou".into(), range_length: None, } ] ); } #[test] fn test_line_ending() { assert_eq!( Document::default(Arc::new(ArcSwap::new(Arc::new(Config::default())))) .text() .to_string(), DEFAULT_LINE_ENDING.as_str() ); } macro_rules! decode { ($name:ident, $label:expr, $label_override:expr) => { #[test] fn $name() { let encoding = encoding::Encoding::for_label($label_override.as_bytes()).unwrap(); let base_path = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/encoding"); let path = base_path.join(format!("{}_in.txt", $label)); let ref_path = base_path.join(format!("{}_in_ref.txt", $label)); assert!(path.exists()); assert!(ref_path.exists()); let mut file = std::fs::File::open(path).unwrap(); let text = from_reader(&mut file, Some(encoding.into())) .unwrap() .0 .to_string(); let expectation = std::fs::read_to_string(ref_path).unwrap(); assert_eq!(text[..], expectation[..]); } }; ($name:ident, $label:expr) => { decode!($name, $label, $label); }; } macro_rules! encode { ($name:ident, $label:expr, $label_override:expr) => { #[test] fn $name() { let encoding = encoding::Encoding::for_label($label_override.as_bytes()).unwrap(); let base_path = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/encoding"); let path = base_path.join(format!("{}_out.txt", $label)); let ref_path = base_path.join(format!("{}_out_ref.txt", $label)); assert!(path.exists()); assert!(ref_path.exists()); let text = Rope::from_str(&std::fs::read_to_string(path).unwrap()); let mut buf: Vec = Vec::new(); helix_lsp::block_on(to_writer(&mut buf, (encoding, false), &text)).unwrap(); let expectation = std::fs::read(ref_path).unwrap(); assert_eq!(buf, expectation); } }; ($name:ident, $label:expr) => { encode!($name, $label, $label); }; } decode!(big5_decode, "big5"); encode!(big5_encode, "big5"); decode!(euc_kr_decode, "euc_kr", "EUC-KR"); encode!(euc_kr_encode, "euc_kr", "EUC-KR"); decode!(gb18030_decode, "gb18030"); encode!(gb18030_encode, "gb18030"); decode!(iso_2022_jp_decode, "iso_2022_jp", "ISO-2022-JP"); encode!(iso_2022_jp_encode, "iso_2022_jp", "ISO-2022-JP"); decode!(jis0208_decode, "jis0208", "EUC-JP"); encode!(jis0208_encode, "jis0208", "EUC-JP"); decode!(jis0212_decode, "jis0212", "EUC-JP"); decode!(shift_jis_decode, "shift_jis"); encode!(shift_jis_encode, "shift_jis"); }