392 lines
14 KiB
Rust
392 lines
14 KiB
Rust
//! Utilities for LSP-related boilerplate code.
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use std::{error::Error, ops::Range, sync::Arc};
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use ide_db::base_db::Cancelled;
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use lsp_server::Notification;
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use crate::{
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from_proto,
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global_state::GlobalState,
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line_index::{LineEndings, LineIndex, OffsetEncoding},
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LspError,
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};
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pub(crate) fn invalid_params_error(message: String) -> LspError {
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LspError { code: lsp_server::ErrorCode::InvalidParams as i32, message }
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}
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pub(crate) fn is_cancelled(e: &(dyn Error + 'static)) -> bool {
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e.downcast_ref::<Cancelled>().is_some()
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}
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pub(crate) fn notification_is<N: lsp_types::notification::Notification>(
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notification: &Notification,
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) -> bool {
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notification.method == N::METHOD
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}
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#[derive(Debug, Eq, PartialEq)]
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pub(crate) enum Progress {
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Begin,
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Report,
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End,
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}
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impl Progress {
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pub(crate) fn fraction(done: usize, total: usize) -> f64 {
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assert!(done <= total);
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done as f64 / total.max(1) as f64
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}
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}
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impl GlobalState {
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pub(crate) fn show_message(&mut self, typ: lsp_types::MessageType, message: String) {
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let message = message;
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self.send_notification::<lsp_types::notification::ShowMessage>(
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lsp_types::ShowMessageParams { typ, message },
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)
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}
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/// rust-analyzer is resilient -- if it fails, this doesn't usually affect
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/// the user experience. Part of that is that we deliberately hide panics
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/// from the user.
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///
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/// We do however want to pester rust-analyzer developers with panics and
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/// other "you really gotta fix that" messages. The current strategy is to
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/// be noisy for "from source" builds or when profiling is enabled.
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///
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/// It's unclear if making from source `cargo xtask install` builds more
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/// panicky is a good idea, let's see if we can keep our awesome bleeding
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/// edge users from being upset!
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pub(crate) fn poke_rust_analyzer_developer(&mut self, message: String) {
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let from_source_build = env!("REV").contains("dev");
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let profiling_enabled = std::env::var("RA_PROFILE").is_ok();
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if from_source_build || profiling_enabled {
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self.show_message(lsp_types::MessageType::ERROR, message)
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}
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}
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pub(crate) fn report_progress(
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&mut self,
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title: &str,
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state: Progress,
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message: Option<String>,
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fraction: Option<f64>,
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) {
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if !self.config.work_done_progress() {
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return;
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}
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let percentage = fraction.map(|f| {
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assert!((0.0..=1.0).contains(&f));
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(f * 100.0) as u32
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});
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let token = lsp_types::ProgressToken::String(format!("rustAnalyzer/{}", title));
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let work_done_progress = match state {
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Progress::Begin => {
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self.send_request::<lsp_types::request::WorkDoneProgressCreate>(
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lsp_types::WorkDoneProgressCreateParams { token: token.clone() },
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|_, _| (),
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);
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lsp_types::WorkDoneProgress::Begin(lsp_types::WorkDoneProgressBegin {
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title: title.into(),
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cancellable: None,
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message,
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percentage,
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})
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}
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Progress::Report => {
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lsp_types::WorkDoneProgress::Report(lsp_types::WorkDoneProgressReport {
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cancellable: None,
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message,
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percentage,
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})
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}
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Progress::End => {
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lsp_types::WorkDoneProgress::End(lsp_types::WorkDoneProgressEnd { message })
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}
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};
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self.send_notification::<lsp_types::notification::Progress>(lsp_types::ProgressParams {
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token,
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value: lsp_types::ProgressParamsValue::WorkDone(work_done_progress),
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});
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}
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}
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pub(crate) fn apply_document_changes(
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old_text: &mut String,
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content_changes: Vec<lsp_types::TextDocumentContentChangeEvent>,
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) {
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let mut line_index = LineIndex {
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index: Arc::new(ide::LineIndex::new(old_text)),
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// We don't care about line endings or offset encoding here.
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endings: LineEndings::Unix,
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encoding: OffsetEncoding::Utf16,
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};
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// The changes we got must be applied sequentially, but can cross lines so we
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// have to keep our line index updated.
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// Some clients (e.g. Code) sort the ranges in reverse. As an optimization, we
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// remember the last valid line in the index and only rebuild it if needed.
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// The VFS will normalize the end of lines to `\n`.
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enum IndexValid {
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All,
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UpToLineExclusive(u32),
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}
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impl IndexValid {
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fn covers(&self, line: u32) -> bool {
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match *self {
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IndexValid::UpToLineExclusive(to) => to > line,
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_ => true,
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}
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}
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}
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let mut index_valid = IndexValid::All;
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for change in content_changes {
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match change.range {
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Some(range) => {
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if !index_valid.covers(range.end.line) {
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line_index.index = Arc::new(ide::LineIndex::new(old_text));
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}
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index_valid = IndexValid::UpToLineExclusive(range.start.line);
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let range = from_proto::text_range(&line_index, range);
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old_text.replace_range(Range::<usize>::from(range), &change.text);
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}
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None => {
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*old_text = change.text;
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index_valid = IndexValid::UpToLineExclusive(0);
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}
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}
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}
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}
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/// Checks that the edits inside the completion and the additional edits do not overlap.
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/// LSP explicitly forbids the additional edits to overlap both with the main edit and themselves.
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pub(crate) fn all_edits_are_disjoint(
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completion: &lsp_types::CompletionItem,
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additional_edits: &[lsp_types::TextEdit],
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) -> bool {
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let mut edit_ranges = Vec::new();
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match completion.text_edit.as_ref() {
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Some(lsp_types::CompletionTextEdit::Edit(edit)) => {
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edit_ranges.push(edit.range);
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}
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Some(lsp_types::CompletionTextEdit::InsertAndReplace(edit)) => {
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let replace = edit.replace;
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let insert = edit.insert;
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if replace.start != insert.start
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|| insert.start > insert.end
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|| insert.end > replace.end
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{
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// insert has to be a prefix of replace but it is not
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return false;
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}
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edit_ranges.push(replace);
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}
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None => {}
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}
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if let Some(additional_changes) = completion.additional_text_edits.as_ref() {
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edit_ranges.extend(additional_changes.iter().map(|edit| edit.range));
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};
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edit_ranges.extend(additional_edits.iter().map(|edit| edit.range));
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edit_ranges.sort_by_key(|range| (range.start, range.end));
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edit_ranges
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.iter()
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.zip(edit_ranges.iter().skip(1))
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.all(|(previous, next)| previous.end <= next.start)
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}
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#[cfg(test)]
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mod tests {
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use lsp_types::{
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CompletionItem, CompletionTextEdit, InsertReplaceEdit, Position, Range,
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TextDocumentContentChangeEvent,
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};
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use super::*;
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#[test]
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fn test_apply_document_changes() {
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macro_rules! c {
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[$($sl:expr, $sc:expr; $el:expr, $ec:expr => $text:expr),+] => {
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vec![$(TextDocumentContentChangeEvent {
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range: Some(Range {
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start: Position { line: $sl, character: $sc },
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end: Position { line: $el, character: $ec },
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}),
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range_length: None,
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text: String::from($text),
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}),+]
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};
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}
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let mut text = String::new();
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apply_document_changes(&mut text, vec![]);
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assert_eq!(text, "");
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apply_document_changes(
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&mut text,
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vec![TextDocumentContentChangeEvent {
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range: None,
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range_length: None,
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text: String::from("the"),
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}],
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);
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assert_eq!(text, "the");
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apply_document_changes(&mut text, c![0, 3; 0, 3 => " quick"]);
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assert_eq!(text, "the quick");
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apply_document_changes(&mut text, c![0, 0; 0, 4 => "", 0, 5; 0, 5 => " foxes"]);
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assert_eq!(text, "quick foxes");
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apply_document_changes(&mut text, c![0, 11; 0, 11 => "\ndream"]);
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assert_eq!(text, "quick foxes\ndream");
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apply_document_changes(&mut text, c![1, 0; 1, 0 => "have "]);
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assert_eq!(text, "quick foxes\nhave dream");
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apply_document_changes(
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&mut text,
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c![0, 0; 0, 0 => "the ", 1, 4; 1, 4 => " quiet", 1, 16; 1, 16 => "s\n"],
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);
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assert_eq!(text, "the quick foxes\nhave quiet dreams\n");
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apply_document_changes(&mut text, c![0, 15; 0, 15 => "\n", 2, 17; 2, 17 => "\n"]);
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assert_eq!(text, "the quick foxes\n\nhave quiet dreams\n\n");
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apply_document_changes(
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&mut text,
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c![1, 0; 1, 0 => "DREAM", 2, 0; 2, 0 => "they ", 3, 0; 3, 0 => "DON'T THEY?"],
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);
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assert_eq!(text, "the quick foxes\nDREAM\nthey have quiet dreams\nDON'T THEY?\n");
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apply_document_changes(&mut text, c![0, 10; 1, 5 => "", 2, 0; 2, 12 => ""]);
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assert_eq!(text, "the quick \nthey have quiet dreams\n");
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text = String::from("❤️");
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apply_document_changes(&mut text, c![0, 0; 0, 0 => "a"]);
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assert_eq!(text, "a❤️");
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text = String::from("a\nb");
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apply_document_changes(&mut text, c![0, 1; 1, 0 => "\nțc", 0, 1; 1, 1 => "d"]);
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assert_eq!(text, "adcb");
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text = String::from("a\nb");
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apply_document_changes(&mut text, c![0, 1; 1, 0 => "ț\nc", 0, 2; 0, 2 => "c"]);
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assert_eq!(text, "ațc\ncb");
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}
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#[test]
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fn empty_completion_disjoint_tests() {
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let empty_completion =
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CompletionItem::new_simple("label".to_string(), "detail".to_string());
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let disjoint_edit_1 = lsp_types::TextEdit::new(
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Range::new(Position::new(2, 2), Position::new(3, 3)),
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"new_text".to_string(),
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);
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let disjoint_edit_2 = lsp_types::TextEdit::new(
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Range::new(Position::new(3, 3), Position::new(4, 4)),
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"new_text".to_string(),
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);
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let joint_edit = lsp_types::TextEdit::new(
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Range::new(Position::new(1, 1), Position::new(5, 5)),
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"new_text".to_string(),
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);
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assert!(
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all_edits_are_disjoint(&empty_completion, &[]),
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"Empty completion has all its edits disjoint"
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);
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assert!(
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all_edits_are_disjoint(
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&empty_completion,
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&[disjoint_edit_1.clone(), disjoint_edit_2.clone()]
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),
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"Empty completion is disjoint to whatever disjoint extra edits added"
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);
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assert!(
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!all_edits_are_disjoint(
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&empty_completion,
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&[disjoint_edit_1, disjoint_edit_2, joint_edit]
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),
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"Empty completion does not prevent joint extra edits from failing the validation"
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);
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}
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#[test]
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fn completion_with_joint_edits_disjoint_tests() {
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let disjoint_edit = lsp_types::TextEdit::new(
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Range::new(Position::new(1, 1), Position::new(2, 2)),
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"new_text".to_string(),
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);
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let disjoint_edit_2 = lsp_types::TextEdit::new(
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Range::new(Position::new(2, 2), Position::new(3, 3)),
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"new_text".to_string(),
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);
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let joint_edit = lsp_types::TextEdit::new(
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Range::new(Position::new(1, 1), Position::new(5, 5)),
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"new_text".to_string(),
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);
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let mut completion_with_joint_edits =
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CompletionItem::new_simple("label".to_string(), "detail".to_string());
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completion_with_joint_edits.additional_text_edits =
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Some(vec![disjoint_edit.clone(), joint_edit.clone()]);
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assert!(
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!all_edits_are_disjoint(&completion_with_joint_edits, &[]),
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"Completion with disjoint edits fails the validation even with empty extra edits"
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);
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completion_with_joint_edits.text_edit =
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Some(CompletionTextEdit::Edit(disjoint_edit.clone()));
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completion_with_joint_edits.additional_text_edits = Some(vec![joint_edit.clone()]);
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assert!(
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!all_edits_are_disjoint(&completion_with_joint_edits, &[]),
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"Completion with disjoint edits fails the validation even with empty extra edits"
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);
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completion_with_joint_edits.text_edit =
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Some(CompletionTextEdit::InsertAndReplace(InsertReplaceEdit {
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new_text: "new_text".to_string(),
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insert: disjoint_edit.range,
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replace: disjoint_edit_2.range,
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}));
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completion_with_joint_edits.additional_text_edits = Some(vec![joint_edit]);
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assert!(
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!all_edits_are_disjoint(&completion_with_joint_edits, &[]),
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"Completion with disjoint edits fails the validation even with empty extra edits"
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);
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}
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#[test]
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fn completion_with_disjoint_edits_disjoint_tests() {
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let disjoint_edit = lsp_types::TextEdit::new(
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Range::new(Position::new(1, 1), Position::new(2, 2)),
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"new_text".to_string(),
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);
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let disjoint_edit_2 = lsp_types::TextEdit::new(
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Range::new(Position::new(2, 2), Position::new(3, 3)),
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"new_text".to_string(),
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);
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let joint_edit = lsp_types::TextEdit::new(
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Range::new(Position::new(1, 1), Position::new(5, 5)),
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"new_text".to_string(),
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);
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let mut completion_with_disjoint_edits =
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CompletionItem::new_simple("label".to_string(), "detail".to_string());
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completion_with_disjoint_edits.text_edit = Some(CompletionTextEdit::Edit(disjoint_edit));
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let completion_with_disjoint_edits = completion_with_disjoint_edits;
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assert!(
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all_edits_are_disjoint(&completion_with_disjoint_edits, &[]),
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"Completion with disjoint edits is valid"
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);
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assert!(
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!all_edits_are_disjoint(&completion_with_disjoint_edits, &[joint_edit]),
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"Completion with disjoint edits and joint extra edit is invalid"
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);
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assert!(
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all_edits_are_disjoint(&completion_with_disjoint_edits, &[disjoint_edit_2]),
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"Completion with disjoint edits and joint extra edit is valid"
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);
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}
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}
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