rust/crates/ra_lsp_server/src/conv.rs

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use languageserver_types::{
self, CreateFile, DocumentChangeOperation, DocumentChanges, InsertTextFormat, Location,
Position, Range, RenameFile, ResourceOp, SymbolKind, TextDocumentEdit, TextDocumentIdentifier,
TextDocumentItem, TextDocumentPositionParams, Url, VersionedTextDocumentIdentifier,
WorkspaceEdit,
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};
use ra_analysis::{
CompletionItem, CompletionItemKind, FileId, FilePosition, FileRange, FileSystemEdit,
InsertText, NavigationTarget, SourceChange, SourceFileEdit,
};
use ra_editor::{translate_offset_with_edit, LineCol, LineIndex};
use ra_syntax::{SyntaxKind, TextRange, TextUnit};
use ra_text_edit::{AtomTextEdit, TextEdit};
use crate::{req, server_world::ServerWorld, Result};
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pub trait Conv {
type Output;
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fn conv(self) -> Self::Output;
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}
pub trait ConvWith {
type Ctx;
type Output;
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fn conv_with(self, ctx: &Self::Ctx) -> Self::Output;
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}
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pub trait TryConvWith {
type Ctx;
type Output;
fn try_conv_with(self, ctx: &Self::Ctx) -> Result<Self::Output>;
}
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impl Conv for SyntaxKind {
type Output = SymbolKind;
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fn conv(self) -> <Self as Conv>::Output {
match self {
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SyntaxKind::FN_DEF => SymbolKind::Function,
SyntaxKind::STRUCT_DEF => SymbolKind::Struct,
SyntaxKind::ENUM_DEF => SymbolKind::Enum,
SyntaxKind::TRAIT_DEF => SymbolKind::Interface,
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SyntaxKind::MODULE => SymbolKind::Module,
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SyntaxKind::TYPE_DEF => SymbolKind::TypeParameter,
SyntaxKind::STATIC_DEF => SymbolKind::Constant,
SyntaxKind::CONST_DEF => SymbolKind::Constant,
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SyntaxKind::IMPL_ITEM => SymbolKind::Object,
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_ => SymbolKind::Variable,
}
}
}
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impl Conv for CompletionItemKind {
type Output = ::languageserver_types::CompletionItemKind;
fn conv(self) -> <Self as Conv>::Output {
use languageserver_types::CompletionItemKind::*;
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match self {
CompletionItemKind::Keyword => Keyword,
CompletionItemKind::Snippet => Snippet,
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CompletionItemKind::Module => Module,
CompletionItemKind::Function => Function,
CompletionItemKind::Struct => Struct,
CompletionItemKind::Enum => Enum,
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CompletionItemKind::EnumVariant => EnumMember,
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CompletionItemKind::Binding => Variable,
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CompletionItemKind::Field => Field,
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}
}
}
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impl Conv for CompletionItem {
type Output = ::languageserver_types::CompletionItem;
fn conv(self) -> <Self as Conv>::Output {
let mut res = ::languageserver_types::CompletionItem {
label: self.label().to_string(),
filter_text: Some(self.lookup().to_string()),
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kind: self.kind().map(|it| it.conv()),
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..Default::default()
};
match self.insert_text() {
InsertText::PlainText { text } => {
res.insert_text = Some(text);
res.insert_text_format = Some(InsertTextFormat::PlainText);
}
InsertText::Snippet { text } => {
res.insert_text = Some(text);
res.insert_text_format = Some(InsertTextFormat::Snippet);
}
}
res
}
}
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impl ConvWith for Position {
type Ctx = LineIndex;
type Output = TextUnit;
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fn conv_with(self, line_index: &LineIndex) -> TextUnit {
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let line_col = LineCol {
line: self.line as u32,
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col_utf16: self.character as u32,
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};
line_index.offset(line_col)
}
}
impl ConvWith for TextUnit {
type Ctx = LineIndex;
type Output = Position;
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fn conv_with(self, line_index: &LineIndex) -> Position {
let line_col = line_index.line_col(self);
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Position::new(u64::from(line_col.line), u64::from(line_col.col_utf16))
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}
}
impl ConvWith for TextRange {
type Ctx = LineIndex;
type Output = Range;
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fn conv_with(self, line_index: &LineIndex) -> Range {
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Range::new(
self.start().conv_with(line_index),
self.end().conv_with(line_index),
)
}
}
impl ConvWith for Range {
type Ctx = LineIndex;
type Output = TextRange;
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fn conv_with(self, line_index: &LineIndex) -> TextRange {
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TextRange::from_to(
self.start.conv_with(line_index),
self.end.conv_with(line_index),
)
}
}
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impl ConvWith for TextEdit {
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type Ctx = LineIndex;
type Output = Vec<languageserver_types::TextEdit>;
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fn conv_with(self, line_index: &LineIndex) -> Vec<languageserver_types::TextEdit> {
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self.as_atoms()
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.into_iter()
.map_conv_with(line_index)
.collect()
}
}
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impl<'a> ConvWith for &'a AtomTextEdit {
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type Ctx = LineIndex;
type Output = languageserver_types::TextEdit;
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fn conv_with(self, line_index: &LineIndex) -> languageserver_types::TextEdit {
languageserver_types::TextEdit {
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range: self.delete.conv_with(line_index),
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new_text: self.insert.clone(),
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}
}
}
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impl<T: ConvWith> ConvWith for Option<T> {
type Ctx = <T as ConvWith>::Ctx;
type Output = Option<<T as ConvWith>::Output>;
fn conv_with(self, ctx: &Self::Ctx) -> Self::Output {
self.map(|x| ConvWith::conv_with(x, ctx))
}
}
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impl<'a> TryConvWith for &'a Url {
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type Ctx = ServerWorld;
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type Output = FileId;
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fn try_conv_with(self, world: &ServerWorld) -> Result<FileId> {
world.uri_to_file_id(self)
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}
}
impl TryConvWith for FileId {
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type Ctx = ServerWorld;
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type Output = Url;
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fn try_conv_with(self, world: &ServerWorld) -> Result<Url> {
world.file_id_to_uri(self)
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}
}
impl<'a> TryConvWith for &'a TextDocumentItem {
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type Ctx = ServerWorld;
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type Output = FileId;
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fn try_conv_with(self, world: &ServerWorld) -> Result<FileId> {
self.uri.try_conv_with(world)
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}
}
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impl<'a> TryConvWith for &'a VersionedTextDocumentIdentifier {
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type Ctx = ServerWorld;
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type Output = FileId;
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fn try_conv_with(self, world: &ServerWorld) -> Result<FileId> {
self.uri.try_conv_with(world)
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}
}
impl<'a> TryConvWith for &'a TextDocumentIdentifier {
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type Ctx = ServerWorld;
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type Output = FileId;
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fn try_conv_with(self, world: &ServerWorld) -> Result<FileId> {
world.uri_to_file_id(&self.uri)
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}
}
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impl<'a> TryConvWith for &'a TextDocumentPositionParams {
type Ctx = ServerWorld;
type Output = FilePosition;
fn try_conv_with(self, world: &ServerWorld) -> Result<FilePosition> {
let file_id = self.text_document.try_conv_with(world)?;
let line_index = world.analysis().file_line_index(file_id);
let offset = self.position.conv_with(&line_index);
Ok(FilePosition { file_id, offset })
}
}
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impl<'a> TryConvWith for (&'a TextDocumentIdentifier, Range) {
type Ctx = ServerWorld;
type Output = FileRange;
fn try_conv_with(self, world: &ServerWorld) -> Result<FileRange> {
let file_id = self.0.try_conv_with(world)?;
let line_index = world.analysis().file_line_index(file_id);
let range = self.1.conv_with(&line_index);
Ok(FileRange { file_id, range })
}
}
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impl<T: TryConvWith> TryConvWith for Vec<T> {
type Ctx = <T as TryConvWith>::Ctx;
type Output = Vec<<T as TryConvWith>::Output>;
fn try_conv_with(self, ctx: &Self::Ctx) -> Result<Self::Output> {
let mut res = Vec::with_capacity(self.len());
for item in self {
res.push(item.try_conv_with(ctx)?);
}
Ok(res)
}
}
impl TryConvWith for SourceChange {
type Ctx = ServerWorld;
type Output = req::SourceChange;
fn try_conv_with(self, world: &ServerWorld) -> Result<req::SourceChange> {
let cursor_position = match self.cursor_position {
None => None,
Some(pos) => {
let line_index = world.analysis().file_line_index(pos.file_id);
let edit = self
.source_file_edits
.iter()
.find(|it| it.file_id == pos.file_id)
.map(|it| &it.edit);
let line_col = match edit {
Some(edit) => translate_offset_with_edit(&*line_index, pos.offset, edit),
None => line_index.line_col(pos.offset),
};
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let position =
Position::new(u64::from(line_col.line), u64::from(line_col.col_utf16));
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Some(TextDocumentPositionParams {
text_document: TextDocumentIdentifier::new(pos.file_id.try_conv_with(world)?),
position,
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})
}
};
let mut document_changes: Vec<DocumentChangeOperation> = Vec::new();
for resource_op in self.file_system_edits.try_conv_with(world)? {
document_changes.push(DocumentChangeOperation::Op(resource_op));
}
for text_document_edit in self.source_file_edits.try_conv_with(world)? {
document_changes.push(DocumentChangeOperation::Edit(text_document_edit));
}
let workspace_edit = WorkspaceEdit {
changes: None,
document_changes: Some(DocumentChanges::Operations(document_changes)),
};
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Ok(req::SourceChange {
label: self.label,
workspace_edit,
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cursor_position,
})
}
}
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impl TryConvWith for SourceFileEdit {
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type Ctx = ServerWorld;
type Output = TextDocumentEdit;
fn try_conv_with(self, world: &ServerWorld) -> Result<TextDocumentEdit> {
let text_document = VersionedTextDocumentIdentifier {
uri: self.file_id.try_conv_with(world)?,
version: None,
};
let line_index = world.analysis().file_line_index(self.file_id);
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let edits = self
.edit
.as_atoms()
.iter()
.map_conv_with(&line_index)
.collect();
Ok(TextDocumentEdit {
text_document,
edits,
})
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}
}
impl TryConvWith for FileSystemEdit {
type Ctx = ServerWorld;
type Output = ResourceOp;
fn try_conv_with(self, world: &ServerWorld) -> Result<ResourceOp> {
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let res = match self {
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FileSystemEdit::CreateFile { source_root, path } => {
let uri = world.path_to_uri(source_root, &path)?.to_string();
ResourceOp::Create(CreateFile { uri, options: None })
}
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FileSystemEdit::MoveFile {
src,
dst_source_root,
dst_path,
} => {
let old_uri = world.file_id_to_uri(src)?.to_string();
let new_uri = world.path_to_uri(dst_source_root, &dst_path)?.to_string();
ResourceOp::Rename(RenameFile {
old_uri,
new_uri,
options: None,
})
}
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};
Ok(res)
}
}
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impl TryConvWith for &NavigationTarget {
type Ctx = ServerWorld;
type Output = Location;
fn try_conv_with(self, world: &ServerWorld) -> Result<Location> {
let line_index = world.analysis().file_line_index(self.file_id());
to_location(self.file_id(), self.range(), &world, &line_index)
}
}
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pub fn to_location(
file_id: FileId,
range: TextRange,
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world: &ServerWorld,
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line_index: &LineIndex,
) -> Result<Location> {
let url = file_id.try_conv_with(world)?;
let loc = Location::new(url, range.conv_with(line_index));
Ok(loc)
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}
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pub trait MapConvWith<'a>: Sized + 'a {
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type Ctx;
type Output;
fn map_conv_with(self, ctx: &'a Self::Ctx) -> ConvWithIter<'a, Self, Self::Ctx> {
ConvWithIter { iter: self, ctx }
}
}
impl<'a, I> MapConvWith<'a> for I
where
I: Iterator + 'a,
I::Item: ConvWith,
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{
type Ctx = <I::Item as ConvWith>::Ctx;
type Output = <I::Item as ConvWith>::Output;
}
pub struct ConvWithIter<'a, I, Ctx: 'a> {
iter: I,
ctx: &'a Ctx,
}
impl<'a, I, Ctx> Iterator for ConvWithIter<'a, I, Ctx>
where
I: Iterator,
I::Item: ConvWith<Ctx = Ctx>,
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{
type Item = <I::Item as ConvWith>::Output;
fn next(&mut self) -> Option<Self::Item> {
self.iter.next().map(|item| item.conv_with(self.ctx))
}
}