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use std::path::Path;
use languageserver_types::{Range, SymbolKind, Position, TextEdit, Location, Url};
use libeditor::{LineIndex, LineCol, Edit, AtomEdit};
use libsyntax2::{SyntaxKind, TextUnit, TextRange};
use Result;
pub trait Conv {
type Output;
fn conv(self) -> Self::Output;
}
pub trait ConvWith {
type Ctx;
type Output;
fn conv_with(self, ctx: &Self::Ctx) -> Self::Output;
}
pub trait TryConvWith {
type Ctx;
type Output;
fn try_conv_with(self, ctx: &Self::Ctx) -> Result<Self::Output>;
}
impl Conv for SyntaxKind {
type Output = SymbolKind;
fn conv(self) -> <Self as Conv>::Output {
match self {
SyntaxKind::FN_DEF => SymbolKind::Function,
SyntaxKind::STRUCT_DEF => SymbolKind::Struct,
SyntaxKind::ENUM_DEF => SymbolKind::Enum,
SyntaxKind::TRAIT_DEF => SymbolKind::Interface,
SyntaxKind::MODULE => SymbolKind::Module,
SyntaxKind::TYPE_DEF => SymbolKind::TypeParameter,
SyntaxKind::STATIC_DEF => SymbolKind::Constant,
SyntaxKind::CONST_DEF => SymbolKind::Constant,
_ => SymbolKind::Variable,
}
}
}
impl ConvWith for Position {
type Ctx = LineIndex;
type Output = TextUnit;
fn conv_with(self, line_index: &LineIndex) -> TextUnit {
// TODO: UTF-16
let line_col = LineCol {
line: self.line as u32,
col: (self.character as u32).into(),
};
line_index.offset(line_col)
}
}
impl ConvWith for TextUnit {
type Ctx = LineIndex;
type Output = Position;
fn conv_with(self, line_index: &LineIndex) -> Position {
let line_col = line_index.line_col(self);
// TODO: UTF-16
Position::new(line_col.line as u64, u32::from(line_col.col) as u64)
}
}
impl ConvWith for TextRange {
type Ctx = LineIndex;
type Output = Range;
fn conv_with(self, line_index: &LineIndex) -> Range {
Range::new(
self.start().conv_with(line_index),
self.end().conv_with(line_index),
)
}
}
impl ConvWith for Range {
type Ctx = LineIndex;
type Output = TextRange;
fn conv_with(self, line_index: &LineIndex) -> TextRange {
TextRange::from_to(
self.start.conv_with(line_index),
self.end.conv_with(line_index),
)
}
}
impl ConvWith for Edit {
type Ctx = LineIndex;
type Output = Vec<TextEdit>;
fn conv_with(self, line_index: &LineIndex) -> Vec<TextEdit> {
self.into_atoms()
.into_iter()
.map_conv_with(line_index)
.collect()
}
}
impl ConvWith for AtomEdit {
type Ctx = LineIndex;
type Output = TextEdit;
fn conv_with(self, line_index: &LineIndex) -> TextEdit {
TextEdit {
range: self.delete.conv_with(line_index),
new_text: self.insert,
}
}
}
impl<'a> TryConvWith for (&'a Path, TextRange) {
type Ctx = LineIndex;
type Output = Location;
fn try_conv_with(self, line_index: &LineIndex) -> Result<Location> {
let loc = Location::new(
Url::from_file_path(self.0)
.map_err(|()| format_err!("can't convert path to url: {}", self.0.display()))?,
self.1.conv_with(line_index),
);
Ok(loc)
}
}
pub trait MapConvWith<'a>: Sized {
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,
I::Item: ConvWith
{
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>,
{
type Item = <I::Item as ConvWith>::Output;
fn next(&mut self) -> Option<Self::Item> {
self.iter.next().map(|item| item.conv_with(self.ctx))
}
}
|
