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helix-plus/helix-term/src/commands/lsp.rs

1173 lines
42 KiB
Rust

use helix_lsp::{
block_on,
lsp::{self, CodeAction, CodeActionOrCommand, DiagnosticSeverity, NumberOrString},
util::{diagnostic_to_lsp_diagnostic, lsp_pos_to_pos, lsp_range_to_range, range_to_lsp_range},
OffsetEncoding,
};
use tui::text::{Span, Spans};
use super::{align_view, push_jump, Align, Context, Editor, Open};
use helix_core::{path, Selection};
use helix_view::{apply_transaction, document::Mode, editor::Action, theme::Style};
use crate::{
compositor::{self, Compositor},
ui::{
self, lsp::SignatureHelp, overlay::overlayed, FileLocation, FilePicker, Popup, PromptEvent,
},
};
use std::{
borrow::Cow, cmp::Ordering, collections::BTreeMap, fmt::Write, path::PathBuf, sync::Arc,
};
/// Gets the language server that is attached to a document, and
/// if it's not active displays a status message. Using this macro
/// in a context where the editor automatically queries the LSP
/// (instead of when the user explicitly does so via a keybind like
/// `gd`) will spam the "LSP inactive" status message confusingly.
#[macro_export]
macro_rules! language_server {
($editor:expr, $doc:expr) => {
match $doc.language_server() {
Some(language_server) => language_server,
None => {
$editor.set_status("Language server not active for current buffer");
return;
}
}
};
}
impl ui::menu::Item for lsp::Location {
/// Current working directory.
type Data = PathBuf;
fn label(&self, cwdir: &Self::Data) -> Spans {
// The preallocation here will overallocate a few characters since it will account for the
// URL's scheme, which is not used most of the time since that scheme will be "file://".
// Those extra chars will be used to avoid allocating when writing the line number (in the
// common case where it has 5 digits or less, which should be enough for a cast majority
// of usages).
let mut res = String::with_capacity(self.uri.as_str().len());
if self.uri.scheme() == "file" {
// With the preallocation above and UTF-8 paths already, this closure will do one (1)
// allocation, for `to_file_path`, else there will be two (2), with `to_string_lossy`.
let mut write_path_to_res = || -> Option<()> {
let path = self.uri.to_file_path().ok()?;
res.push_str(&path.strip_prefix(cwdir).unwrap_or(&path).to_string_lossy());
Some(())
};
write_path_to_res();
} else {
// Never allocates since we declared the string with this capacity already.
res.push_str(self.uri.as_str());
}
// Most commonly, this will not allocate, especially on Unix systems where the root prefix
// is a simple `/` and not `C:\` (with whatever drive letter)
write!(&mut res, ":{}", self.range.start.line)
.expect("Will only failed if allocating fail");
res.into()
}
}
impl ui::menu::Item for lsp::SymbolInformation {
/// Path to currently focussed document
type Data = Option<lsp::Url>;
fn label(&self, current_doc_path: &Self::Data) -> Spans {
if current_doc_path.as_ref() == Some(&self.location.uri) {
self.name.as_str().into()
} else {
match self.location.uri.to_file_path() {
Ok(path) => {
let get_relative_path = path::get_relative_path(path.as_path());
format!("{} ({})", &self.name, get_relative_path.to_string_lossy()).into()
}
Err(_) => format!("{} ({})", &self.name, &self.location.uri).into(),
}
}
}
}
struct DiagnosticStyles {
hint: Style,
info: Style,
warning: Style,
error: Style,
}
struct PickerDiagnostic {
url: lsp::Url,
diag: lsp::Diagnostic,
}
impl ui::menu::Item for PickerDiagnostic {
type Data = (DiagnosticStyles, DiagnosticsFormat);
fn label(&self, (styles, format): &Self::Data) -> Spans {
let mut style = self
.diag
.severity
.map(|s| match s {
DiagnosticSeverity::HINT => styles.hint,
DiagnosticSeverity::INFORMATION => styles.info,
DiagnosticSeverity::WARNING => styles.warning,
DiagnosticSeverity::ERROR => styles.error,
_ => Style::default(),
})
.unwrap_or_default();
// remove background as it is distracting in the picker list
style.bg = None;
let code: Cow<'_, str> = self
.diag
.code
.as_ref()
.map(|c| match c {
NumberOrString::Number(n) => n.to_string().into(),
NumberOrString::String(s) => s.as_str().into(),
})
.unwrap_or_default();
let path = match format {
DiagnosticsFormat::HideSourcePath => String::new(),
DiagnosticsFormat::ShowSourcePath => {
let path = path::get_truncated_path(self.url.path());
format!("{}: ", path.to_string_lossy())
}
};
Spans::from(vec![
Span::raw(path),
Span::styled(&self.diag.message, style),
Span::styled(code, style),
])
}
}
fn location_to_file_location(location: &lsp::Location) -> FileLocation {
let path = location.uri.to_file_path().unwrap();
let line = Some((
location.range.start.line as usize,
location.range.end.line as usize,
));
(path, line)
}
// TODO: share with symbol picker(symbol.location)
fn jump_to_location(
editor: &mut Editor,
location: &lsp::Location,
offset_encoding: OffsetEncoding,
action: Action,
) {
let (view, doc) = current!(editor);
push_jump(view, doc);
let path = match location.uri.to_file_path() {
Ok(path) => path,
Err(_) => {
let err = format!("unable to convert URI to filepath: {}", location.uri);
editor.set_error(err);
return;
}
};
match editor.open(&path, action) {
Ok(_) => (),
Err(err) => {
let err = format!("failed to open path: {:?}: {:?}", location.uri, err);
editor.set_error(err);
return;
}
}
let (view, doc) = current!(editor);
let definition_pos = location.range.start;
// TODO: convert inside server
let new_pos = if let Some(new_pos) = lsp_pos_to_pos(doc.text(), definition_pos, offset_encoding)
{
new_pos
} else {
return;
};
doc.set_selection(view.id, Selection::point(new_pos));
align_view(doc, view, Align::Center);
}
fn sym_picker(
symbols: Vec<lsp::SymbolInformation>,
current_path: Option<lsp::Url>,
offset_encoding: OffsetEncoding,
) -> FilePicker<lsp::SymbolInformation> {
// TODO: drop current_path comparison and instead use workspace: bool flag?
FilePicker::new(
symbols,
current_path.clone(),
move |cx, symbol, action| {
let (view, doc) = current!(cx.editor);
push_jump(view, doc);
if current_path.as_ref() != Some(&symbol.location.uri) {
let uri = &symbol.location.uri;
let path = match uri.to_file_path() {
Ok(path) => path,
Err(_) => {
let err = format!("unable to convert URI to filepath: {}", uri);
cx.editor.set_error(err);
return;
}
};
if let Err(err) = cx.editor.open(&path, action) {
let err = format!("failed to open document: {}: {}", uri, err);
log::error!("{}", err);
cx.editor.set_error(err);
return;
}
}
let (view, doc) = current!(cx.editor);
if let Some(range) =
lsp_range_to_range(doc.text(), symbol.location.range, offset_encoding)
{
// we flip the range so that the cursor sits on the start of the symbol
// (for example start of the function).
doc.set_selection(view.id, Selection::single(range.head, range.anchor));
align_view(doc, view, Align::Center);
}
},
move |_editor, symbol| Some(location_to_file_location(&symbol.location)),
)
.truncate_start(false)
}
#[derive(Copy, Clone, PartialEq)]
enum DiagnosticsFormat {
ShowSourcePath,
HideSourcePath,
}
fn diag_picker(
cx: &Context,
diagnostics: BTreeMap<lsp::Url, Vec<lsp::Diagnostic>>,
current_path: Option<lsp::Url>,
format: DiagnosticsFormat,
offset_encoding: OffsetEncoding,
) -> FilePicker<PickerDiagnostic> {
// TODO: drop current_path comparison and instead use workspace: bool flag?
// flatten the map to a vec of (url, diag) pairs
let mut flat_diag = Vec::new();
for (url, diags) in diagnostics {
flat_diag.reserve(diags.len());
for diag in diags {
flat_diag.push(PickerDiagnostic {
url: url.clone(),
diag,
});
}
}
let styles = DiagnosticStyles {
hint: cx.editor.theme.get("hint"),
info: cx.editor.theme.get("info"),
warning: cx.editor.theme.get("warning"),
error: cx.editor.theme.get("error"),
};
FilePicker::new(
flat_diag,
(styles, format),
move |cx, PickerDiagnostic { url, diag }, action| {
if current_path.as_ref() == Some(url) {
let (view, doc) = current!(cx.editor);
push_jump(view, doc);
} else {
let path = url.to_file_path().unwrap();
cx.editor.open(&path, action).expect("editor.open failed");
}
let (view, doc) = current!(cx.editor);
if let Some(range) = lsp_range_to_range(doc.text(), diag.range, offset_encoding) {
// we flip the range so that the cursor sits on the start of the symbol
// (for example start of the function).
doc.set_selection(view.id, Selection::single(range.head, range.anchor));
align_view(doc, view, Align::Center);
}
},
move |_editor, PickerDiagnostic { url, diag }| {
let location = lsp::Location::new(url.clone(), diag.range);
Some(location_to_file_location(&location))
},
)
.truncate_start(false)
}
pub fn symbol_picker(cx: &mut Context) {
fn nested_to_flat(
list: &mut Vec<lsp::SymbolInformation>,
file: &lsp::TextDocumentIdentifier,
symbol: lsp::DocumentSymbol,
) {
#[allow(deprecated)]
list.push(lsp::SymbolInformation {
name: symbol.name,
kind: symbol.kind,
tags: symbol.tags,
deprecated: symbol.deprecated,
location: lsp::Location::new(file.uri.clone(), symbol.selection_range),
container_name: None,
});
for child in symbol.children.into_iter().flatten() {
nested_to_flat(list, file, child);
}
}
let doc = doc!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let current_url = doc.url();
let offset_encoding = language_server.offset_encoding();
let future = language_server.document_symbols(doc.identifier());
cx.callback(
future,
move |editor, compositor, response: Option<lsp::DocumentSymbolResponse>| {
if let Some(symbols) = response {
// lsp has two ways to represent symbols (flat/nested)
// convert the nested variant to flat, so that we have a homogeneous list
let symbols = match symbols {
lsp::DocumentSymbolResponse::Flat(symbols) => symbols,
lsp::DocumentSymbolResponse::Nested(symbols) => {
let doc = doc!(editor);
let mut flat_symbols = Vec::new();
for symbol in symbols {
nested_to_flat(&mut flat_symbols, &doc.identifier(), symbol)
}
flat_symbols
}
};
let picker = sym_picker(symbols, current_url, offset_encoding);
compositor.push(Box::new(overlayed(picker)))
}
},
)
}
pub fn workspace_symbol_picker(cx: &mut Context) {
let doc = doc!(cx.editor);
let current_url = doc.url();
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let future = language_server.workspace_symbols("".to_string());
cx.callback(
future,
move |_editor, compositor, response: Option<Vec<lsp::SymbolInformation>>| {
if let Some(symbols) = response {
let picker = sym_picker(symbols, current_url, offset_encoding);
compositor.push(Box::new(overlayed(picker)))
}
},
)
}
pub fn diagnostics_picker(cx: &mut Context) {
let doc = doc!(cx.editor);
let language_server = language_server!(cx.editor, doc);
if let Some(current_url) = doc.url() {
let offset_encoding = language_server.offset_encoding();
let diagnostics = cx
.editor
.diagnostics
.get(&current_url)
.cloned()
.unwrap_or_default();
let picker = diag_picker(
cx,
[(current_url.clone(), diagnostics)].into(),
Some(current_url),
DiagnosticsFormat::HideSourcePath,
offset_encoding,
);
cx.push_layer(Box::new(overlayed(picker)));
}
}
pub fn workspace_diagnostics_picker(cx: &mut Context) {
let doc = doc!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let current_url = doc.url();
let offset_encoding = language_server.offset_encoding();
let diagnostics = cx.editor.diagnostics.clone();
let picker = diag_picker(
cx,
diagnostics,
current_url,
DiagnosticsFormat::ShowSourcePath,
offset_encoding,
);
cx.push_layer(Box::new(overlayed(picker)));
}
impl ui::menu::Item for lsp::CodeActionOrCommand {
type Data = ();
fn label(&self, _data: &Self::Data) -> Spans {
match self {
lsp::CodeActionOrCommand::CodeAction(action) => action.title.as_str().into(),
lsp::CodeActionOrCommand::Command(command) => command.title.as_str().into(),
}
}
}
/// Determines the category of the `CodeAction` using the `CodeAction::kind` field.
/// Returns a number that represent these categories.
/// Categories with a lower number should be displayed first.
///
///
/// While the `kind` field is defined as open ended in the LSP spec (any value may be used)
/// in practice a closed set of common values (mostly suggested in the LSP spec) are used.
/// VSCode displays each of these categories seperatly (seperated by a heading in the codeactions picker)
/// to make them easier to navigate. Helix does not display these headings to the user.
/// However it does sort code actions by their categories to achieve the same order as the VScode picker,
/// just without the headings.
///
/// The order used here is modeled after the [vscode sourcecode](https://github.com/microsoft/vscode/blob/eaec601dd69aeb4abb63b9601a6f44308c8d8c6e/src/vs/editor/contrib/codeAction/browser/codeActionWidget.ts>)
fn action_category(action: &CodeActionOrCommand) -> u32 {
if let CodeActionOrCommand::CodeAction(CodeAction {
kind: Some(kind), ..
}) = action
{
let mut components = kind.as_str().split('.');
match components.next() {
Some("quickfix") => 0,
Some("refactor") => match components.next() {
Some("extract") => 1,
Some("inline") => 2,
Some("rewrite") => 3,
Some("move") => 4,
Some("surround") => 5,
_ => 7,
},
Some("source") => 6,
_ => 7,
}
} else {
7
}
}
fn action_prefered(action: &CodeActionOrCommand) -> bool {
matches!(
action,
CodeActionOrCommand::CodeAction(CodeAction {
is_preferred: Some(true),
..
})
)
}
fn action_fixes_diagnostics(action: &CodeActionOrCommand) -> bool {
matches!(
action,
CodeActionOrCommand::CodeAction(CodeAction {
diagnostics: Some(diagnostics),
..
}) if !diagnostics.is_empty()
)
}
pub fn code_action(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let selection_range = doc.selection(view.id).primary();
let offset_encoding = language_server.offset_encoding();
let range = range_to_lsp_range(doc.text(), selection_range, offset_encoding);
let future = language_server.code_actions(
doc.identifier(),
range,
// Filter and convert overlapping diagnostics
lsp::CodeActionContext {
diagnostics: doc
.diagnostics()
.iter()
.filter(|&diag| {
selection_range
.overlaps(&helix_core::Range::new(diag.range.start, diag.range.end))
})
.map(|diag| diagnostic_to_lsp_diagnostic(doc.text(), diag, offset_encoding))
.collect(),
only: None,
},
);
cx.callback(
future,
move |editor, compositor, response: Option<lsp::CodeActionResponse>| {
let mut actions = match response {
Some(a) => a,
None => return,
};
// remove disabled code actions
actions.retain(|action| {
matches!(
action,
CodeActionOrCommand::Command(_)
| CodeActionOrCommand::CodeAction(CodeAction { disabled: None, .. })
)
});
if actions.is_empty() {
editor.set_status("No code actions available");
return;
}
// Sort codeactions into a useful order. This behaviour is only partially described in the LSP spec.
// Many details are modeled after vscode because langauge servers are usually tested against it.
// VScode sorts the codeaction two times:
//
// First the codeactions that fix some diagnostics are moved to the front.
// If both codeactions fix some diagnostics (or both fix none) the codeaction
// that is marked with `is_preffered` is shown first. The codeactions are then shown in seperate
// submenus that only contain a certain category (see `action_category`) of actions.
//
// Below this done in in a single sorting step
actions.sort_by(|action1, action2| {
// sort actions by category
let order = action_category(action1).cmp(&action_category(action2));
if order != Ordering::Equal {
return order;
}
// within the categories sort by relevancy.
// Modeled after the `codeActionsComparator` function in vscode:
// https://github.com/microsoft/vscode/blob/eaec601dd69aeb4abb63b9601a6f44308c8d8c6e/src/vs/editor/contrib/codeAction/browser/codeAction.ts
// if one code action fixes a diagnostic but the other one doesn't show it first
let order = action_fixes_diagnostics(action1)
.cmp(&action_fixes_diagnostics(action2))
.reverse();
if order != Ordering::Equal {
return order;
}
// if one of the codeactions is marked as prefered show it first
// otherwise keep the original LSP sorting
action_prefered(action1)
.cmp(&action_prefered(action2))
.reverse()
});
let mut picker = ui::Menu::new(actions, (), move |editor, code_action, event| {
if event != PromptEvent::Validate {
return;
}
// always present here
let code_action = code_action.unwrap();
match code_action {
lsp::CodeActionOrCommand::Command(command) => {
log::debug!("code action command: {:?}", command);
execute_lsp_command(editor, command.clone());
}
lsp::CodeActionOrCommand::CodeAction(code_action) => {
log::debug!("code action: {:?}", code_action);
if let Some(ref workspace_edit) = code_action.edit {
log::debug!("edit: {:?}", workspace_edit);
apply_workspace_edit(editor, offset_encoding, workspace_edit);
}
// if code action provides both edit and command first the edit
// should be applied and then the command
if let Some(command) = &code_action.command {
execute_lsp_command(editor, command.clone());
}
}
}
});
picker.move_down(); // pre-select the first item
let popup = Popup::new("code-action", picker);
compositor.replace_or_push("code-action", popup);
},
)
}
impl ui::menu::Item for lsp::Command {
type Data = ();
fn label(&self, _data: &Self::Data) -> Spans {
self.title.as_str().into()
}
}
pub fn execute_lsp_command(editor: &mut Editor, cmd: lsp::Command) {
let doc = doc!(editor);
let language_server = language_server!(editor, doc);
// the command is executed on the server and communicated back
// to the client asynchronously using workspace edits
let command_future = language_server.command(cmd);
tokio::spawn(async move {
let res = command_future.await;
if let Err(e) = res {
log::error!("execute LSP command: {}", e);
}
});
}
pub fn apply_document_resource_op(op: &lsp::ResourceOp) -> std::io::Result<()> {
use lsp::ResourceOp;
use std::fs;
match op {
ResourceOp::Create(op) => {
let path = op.uri.to_file_path().unwrap();
let ignore_if_exists = op.options.as_ref().map_or(false, |options| {
!options.overwrite.unwrap_or(false) && options.ignore_if_exists.unwrap_or(false)
});
if ignore_if_exists && path.exists() {
Ok(())
} else {
// Create directory if it does not exist
if let Some(dir) = path.parent() {
if !dir.is_dir() {
fs::create_dir_all(dir)?;
}
}
fs::write(&path, [])
}
}
ResourceOp::Delete(op) => {
let path = op.uri.to_file_path().unwrap();
if path.is_dir() {
let recursive = op
.options
.as_ref()
.and_then(|options| options.recursive)
.unwrap_or(false);
if recursive {
fs::remove_dir_all(&path)
} else {
fs::remove_dir(&path)
}
} else if path.is_file() {
fs::remove_file(&path)
} else {
Ok(())
}
}
ResourceOp::Rename(op) => {
let from = op.old_uri.to_file_path().unwrap();
let to = op.new_uri.to_file_path().unwrap();
let ignore_if_exists = op.options.as_ref().map_or(false, |options| {
!options.overwrite.unwrap_or(false) && options.ignore_if_exists.unwrap_or(false)
});
if ignore_if_exists && to.exists() {
Ok(())
} else {
fs::rename(&from, &to)
}
}
}
}
pub fn apply_workspace_edit(
editor: &mut Editor,
offset_encoding: OffsetEncoding,
workspace_edit: &lsp::WorkspaceEdit,
) {
let mut apply_edits = |uri: &helix_lsp::Url, text_edits: Vec<lsp::TextEdit>| {
let path = match uri.to_file_path() {
Ok(path) => path,
Err(_) => {
let err = format!("unable to convert URI to filepath: {}", uri);
log::error!("{}", err);
editor.set_error(err);
return;
}
};
let current_view_id = view!(editor).id;
let doc_id = match editor.open(&path, Action::Load) {
Ok(doc_id) => doc_id,
Err(err) => {
let err = format!("failed to open document: {}: {}", uri, err);
log::error!("{}", err);
editor.set_error(err);
return;
}
};
let doc = doc_mut!(editor, &doc_id);
// Need to determine a view for apply/append_changes_to_history
let selections = doc.selections();
let view_id = if selections.contains_key(&current_view_id) {
// use current if possible
current_view_id
} else {
// Hack: we take the first available view_id
selections
.keys()
.next()
.copied()
.expect("No view_id available")
};
let transaction = helix_lsp::util::generate_transaction_from_edits(
doc.text(),
text_edits,
offset_encoding,
);
apply_transaction(&transaction, doc, view_mut!(editor, view_id));
doc.append_changes_to_history(view_id);
};
if let Some(ref changes) = workspace_edit.changes {
log::debug!("workspace changes: {:?}", changes);
for (uri, text_edits) in changes {
let text_edits = text_edits.to_vec();
apply_edits(uri, text_edits)
}
return;
// Not sure if it works properly, it'll be safer to just panic here to avoid breaking some parts of code on which code actions will be used
// TODO: find some example that uses workspace changes, and test it
// for (url, edits) in changes.iter() {
// let file_path = url.origin().ascii_serialization();
// let file_path = std::path::PathBuf::from(file_path);
// let file = std::fs::File::open(file_path).unwrap();
// let mut text = Rope::from_reader(file).unwrap();
// let transaction = edits_to_changes(&text, edits);
// transaction.apply(&mut text);
// }
}
if let Some(ref document_changes) = workspace_edit.document_changes {
match document_changes {
lsp::DocumentChanges::Edits(document_edits) => {
for document_edit in document_edits {
let edits = document_edit
.edits
.iter()
.map(|edit| match edit {
lsp::OneOf::Left(text_edit) => text_edit,
lsp::OneOf::Right(annotated_text_edit) => {
&annotated_text_edit.text_edit
}
})
.cloned()
.collect();
apply_edits(&document_edit.text_document.uri, edits);
}
}
lsp::DocumentChanges::Operations(operations) => {
log::debug!("document changes - operations: {:?}", operations);
for operation in operations {
match operation {
lsp::DocumentChangeOperation::Op(op) => {
apply_document_resource_op(op).unwrap();
}
lsp::DocumentChangeOperation::Edit(document_edit) => {
let edits = document_edit
.edits
.iter()
.map(|edit| match edit {
lsp::OneOf::Left(text_edit) => text_edit,
lsp::OneOf::Right(annotated_text_edit) => {
&annotated_text_edit.text_edit
}
})
.cloned()
.collect();
apply_edits(&document_edit.text_document.uri, edits);
}
}
}
}
}
}
}
fn goto_impl(
editor: &mut Editor,
compositor: &mut Compositor,
locations: Vec<lsp::Location>,
offset_encoding: OffsetEncoding,
) {
let cwdir = std::env::current_dir().unwrap_or_default();
match locations.as_slice() {
[location] => {
jump_to_location(editor, location, offset_encoding, Action::Replace);
}
[] => {
editor.set_error("No definition found.");
}
_locations => {
let picker = FilePicker::new(
locations,
cwdir,
move |cx, location, action| {
jump_to_location(cx.editor, location, offset_encoding, action)
},
move |_editor, location| Some(location_to_file_location(location)),
);
compositor.push(Box::new(overlayed(picker)));
}
}
}
fn to_locations(definitions: Option<lsp::GotoDefinitionResponse>) -> Vec<lsp::Location> {
match definitions {
Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location],
Some(lsp::GotoDefinitionResponse::Array(locations)) => locations,
Some(lsp::GotoDefinitionResponse::Link(locations)) => locations
.into_iter()
.map(|location_link| lsp::Location {
uri: location_link.target_uri,
range: location_link.target_range,
})
.collect(),
None => Vec::new(),
}
}
pub fn goto_definition(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = language_server.goto_definition(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, compositor, response: Option<lsp::GotoDefinitionResponse>| {
let items = to_locations(response);
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
pub fn goto_type_definition(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = language_server.goto_type_definition(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, compositor, response: Option<lsp::GotoDefinitionResponse>| {
let items = to_locations(response);
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
pub fn goto_implementation(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = language_server.goto_implementation(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, compositor, response: Option<lsp::GotoDefinitionResponse>| {
let items = to_locations(response);
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
pub fn goto_reference(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = language_server.goto_reference(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, compositor, response: Option<Vec<lsp::Location>>| {
let items = response.unwrap_or_default();
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
#[derive(PartialEq, Eq)]
pub enum SignatureHelpInvoked {
Manual,
Automatic,
}
pub fn signature_help(cx: &mut Context) {
signature_help_impl(cx, SignatureHelpInvoked::Manual)
}
pub fn signature_help_impl(cx: &mut Context, invoked: SignatureHelpInvoked) {
let (view, doc) = current!(cx.editor);
let was_manually_invoked = invoked == SignatureHelpInvoked::Manual;
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => {
// Do not show the message if signature help was invoked
// automatically on backspace, trigger characters, etc.
if was_manually_invoked {
cx.editor
.set_status("Language server not active for current buffer");
}
return;
}
};
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = match language_server.text_document_signature_help(doc.identifier(), pos, None) {
Some(f) => f,
None => return,
};
cx.callback(
future,
move |editor, compositor, response: Option<lsp::SignatureHelp>| {
let config = &editor.config();
if !(config.lsp.auto_signature_help
|| SignatureHelp::visible_popup(compositor).is_some()
|| was_manually_invoked)
{
return;
}
// If the signature help invocation is automatic, don't show it outside of Insert Mode:
// it very probably means the server was a little slow to respond and the user has
// already moved on to something else, making a signature help popup will just be an
// annoyance, see https://github.com/helix-editor/helix/issues/3112
if !was_manually_invoked && editor.mode != Mode::Insert {
return;
}
let response = match response {
// According to the spec the response should be None if there
// are no signatures, but some servers don't follow this.
Some(s) if !s.signatures.is_empty() => s,
_ => {
compositor.remove(SignatureHelp::ID);
return;
}
};
let doc = doc!(editor);
let language = doc.language_name().unwrap_or("");
let signature = match response
.signatures
.get(response.active_signature.unwrap_or(0) as usize)
{
Some(s) => s,
None => return,
};
let mut contents = SignatureHelp::new(
signature.label.clone(),
language.to_string(),
Arc::clone(&editor.syn_loader),
);
let signature_doc = if config.lsp.display_signature_help_docs {
signature.documentation.as_ref().map(|doc| match doc {
lsp::Documentation::String(s) => s.clone(),
lsp::Documentation::MarkupContent(markup) => markup.value.clone(),
})
} else {
None
};
contents.set_signature_doc(signature_doc);
let active_param_range = || -> Option<(usize, usize)> {
let param_idx = signature
.active_parameter
.or(response.active_parameter)
.unwrap_or(0) as usize;
let param = signature.parameters.as_ref()?.get(param_idx)?;
match &param.label {
lsp::ParameterLabel::Simple(string) => {
let start = signature.label.find(string.as_str())?;
Some((start, start + string.len()))
}
lsp::ParameterLabel::LabelOffsets([start, end]) => {
// LS sends offsets based on utf-16 based string representation
// but highlighting in helix is done using byte offset.
use helix_core::str_utils::char_to_byte_idx;
let from = char_to_byte_idx(&signature.label, *start as usize);
let to = char_to_byte_idx(&signature.label, *end as usize);
Some((from, to))
}
}
};
contents.set_active_param_range(active_param_range());
let old_popup = compositor.find_id::<Popup<SignatureHelp>>(SignatureHelp::ID);
let popup = Popup::new(SignatureHelp::ID, contents)
.position(old_popup.and_then(|p| p.get_position()))
.position_bias(Open::Above)
.ignore_escape_key(true);
compositor.replace_or_push(SignatureHelp::ID, popup);
},
);
}
pub fn hover(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
// TODO: factor out a doc.position_identifier() that returns lsp::TextDocumentPositionIdentifier
let pos = doc.position(view.id, offset_encoding);
let future = language_server.text_document_hover(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, compositor, response: Option<lsp::Hover>| {
if let Some(hover) = response {
// hover.contents / .range <- used for visualizing
fn marked_string_to_markdown(contents: lsp::MarkedString) -> String {
match contents {
lsp::MarkedString::String(contents) => contents,
lsp::MarkedString::LanguageString(string) => {
if string.language == "markdown" {
string.value
} else {
format!("```{}\n{}\n```", string.language, string.value)
}
}
}
}
let contents = match hover.contents {
lsp::HoverContents::Scalar(contents) => marked_string_to_markdown(contents),
lsp::HoverContents::Array(contents) => contents
.into_iter()
.map(marked_string_to_markdown)
.collect::<Vec<_>>()
.join("\n\n"),
lsp::HoverContents::Markup(contents) => contents.value,
};
// skip if contents empty
let contents = ui::Markdown::new(contents, editor.syn_loader.clone());
let popup = Popup::new("hover", contents).auto_close(true);
compositor.replace_or_push("hover", popup);
}
},
);
}
pub fn rename_symbol(cx: &mut Context) {
let (view, doc) = current_ref!(cx.editor);
let text = doc.text().slice(..);
let primary_selection = doc.selection(view.id).primary();
let prefill = if primary_selection.len() > 1 {
primary_selection
} else {
use helix_core::textobject::{textobject_word, TextObject};
textobject_word(text, primary_selection, TextObject::Inside, 1, false)
}
.fragment(text)
.into();
ui::prompt_with_input(
cx,
"rename-to:".into(),
prefill,
None,
ui::completers::none,
move |cx: &mut compositor::Context, input: &str, event: PromptEvent| {
if event != PromptEvent::Validate {
return;
}
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let task = language_server.rename_symbol(doc.identifier(), pos, input.to_string());
match block_on(task) {
Ok(edits) => apply_workspace_edit(cx.editor, offset_encoding, &edits),
Err(err) => cx.editor.set_error(err.to_string()),
}
},
);
}
pub fn select_references_to_symbol_under_cursor(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = language_server!(cx.editor, doc);
let offset_encoding = language_server.offset_encoding();
let pos = doc.position(view.id, offset_encoding);
let future = language_server.text_document_document_highlight(doc.identifier(), pos, None);
cx.callback(
future,
move |editor, _compositor, response: Option<Vec<lsp::DocumentHighlight>>| {
let document_highlights = match response {
Some(highlights) if !highlights.is_empty() => highlights,
_ => return,
};
let (view, doc) = current!(editor);
let language_server = language_server!(editor, doc);
let offset_encoding = language_server.offset_encoding();
let text = doc.text();
let pos = doc.selection(view.id).primary().head;
// We must find the range that contains our primary cursor to prevent our primary cursor to move
let mut primary_index = 0;
let ranges = document_highlights
.iter()
.filter_map(|highlight| lsp_range_to_range(text, highlight.range, offset_encoding))
.enumerate()
.map(|(i, range)| {
if range.contains(pos) {
primary_index = i;
}
range
})
.collect();
let selection = Selection::new(ranges, primary_index);
doc.set_selection(view.id, selection);
},
);
}