src/tools/rust-analyzer/crates/rust-analyzer/src/from_proto.rs

   1 //! Conversion lsp_types types to rust-analyzer specific ones.
   2 use anyhow::format_err;
   3 use ide::{Annotation, AnnotationKind, AssistKind, LineCol, LineColUtf16};
   4 use ide_db::base_db::{FileId, FilePosition, FileRange};
   5 use syntax::{TextRange, TextSize};
   6 use vfs::AbsPathBuf;
   7
   8 use crate::{
   9     from_json,
  10     global_state::GlobalStateSnapshot,
  11     line_index::{LineIndex, OffsetEncoding},
  12     lsp_ext,
  13     lsp_utils::invalid_params_error,
  14     Result,
  15 };
  16
  17 pub(crate) fn abs_path(url: &lsp_types::Url) -> Result<AbsPathBuf> {
  18     let path = url.to_file_path().map_err(|()| "url is not a file")?;
  19     Ok(AbsPathBuf::try_from(path).unwrap())
  20 }
  21
  22 pub(crate) fn vfs_path(url: &lsp_types::Url) -> Result<vfs::VfsPath> {
  23     abs_path(url).map(vfs::VfsPath::from)
  24 }
  25
  26 pub(crate) fn offset(line_index: &LineIndex, position: lsp_types::Position) -> Result<TextSize> {
  27     let line_col = match line_index.encoding {
  28         OffsetEncoding::Utf8 => {
  29             LineCol { line: position.line as u32, col: position.character as u32 }
  30         }
  31         OffsetEncoding::Utf16 => {
  32             let line_col =
  33                 LineColUtf16 { line: position.line as u32, col: position.character as u32 };
  34             line_index.index.to_utf8(line_col)
  35         }
  36     };
  37     let text_size =
  38         line_index.index.offset(line_col).ok_or_else(|| format_err!("Invalid offset"))?;
  39     Ok(text_size)
  40 }
  41
  42 pub(crate) fn text_range(line_index: &LineIndex, range: lsp_types::Range) -> Result<TextRange> {
  43     let start = offset(line_index, range.start)?;
  44     let end = offset(line_index, range.end)?;
  45     let text_range = TextRange::new(start, end);
  46     Ok(text_range)
  47 }
  48
  49 pub(crate) fn file_id(snap: &GlobalStateSnapshot, url: &lsp_types::Url) -> Result<FileId> {
  50     snap.url_to_file_id(url)
  51 }
  52
  53 pub(crate) fn file_position(
  54     snap: &GlobalStateSnapshot,
  55     tdpp: lsp_types::TextDocumentPositionParams,
  56 ) -> Result<FilePosition> {
  57     let file_id = file_id(snap, &tdpp.text_document.uri)?;
  58     let line_index = snap.file_line_index(file_id)?;
  59     let offset = offset(&line_index, tdpp.position)?;
  60     Ok(FilePosition { file_id, offset })
  61 }
  62
  63 pub(crate) fn file_range(
  64     snap: &GlobalStateSnapshot,
  65     text_document_identifier: lsp_types::TextDocumentIdentifier,
  66     range: lsp_types::Range,
  67 ) -> Result<FileRange> {
  68     let file_id = file_id(snap, &text_document_identifier.uri)?;
  69     let line_index = snap.file_line_index(file_id)?;
  70     let range = text_range(&line_index, range)?;
  71     Ok(FileRange { file_id, range })
  72 }
  73
  74 pub(crate) fn assist_kind(kind: lsp_types::CodeActionKind) -> Option<AssistKind> {
  75     let assist_kind = match &kind {
  76         k if k == &lsp_types::CodeActionKind::EMPTY => AssistKind::None,
  77         k if k == &lsp_types::CodeActionKind::QUICKFIX => AssistKind::QuickFix,
  78         k if k == &lsp_types::CodeActionKind::REFACTOR => AssistKind::Refactor,
  79         k if k == &lsp_types::CodeActionKind::REFACTOR_EXTRACT => AssistKind::RefactorExtract,
  80         k if k == &lsp_types::CodeActionKind::REFACTOR_INLINE => AssistKind::RefactorInline,
  81         k if k == &lsp_types::CodeActionKind::REFACTOR_REWRITE => AssistKind::RefactorRewrite,
  82         _ => return None,
  83     };
  84
  85     Some(assist_kind)
  86 }
  87
  88 pub(crate) fn annotation(
  89     snap: &GlobalStateSnapshot,
  90     code_lens: lsp_types::CodeLens,
  91 ) -> Result<Annotation> {
  92     let data =
  93         code_lens.data.ok_or_else(|| invalid_params_error("code lens without data".to_string()))?;
  94     let resolve = from_json::<lsp_ext::CodeLensResolveData>("CodeLensResolveData", &data)?;
  95
  96     match resolve {
  97         lsp_ext::CodeLensResolveData::Impls(params) => {
  98             let pos @ FilePosition { file_id, .. } =
  99                 file_position(snap, params.text_document_position_params)?;
 100             let line_index = snap.file_line_index(file_id)?;
 101
 102             Ok(Annotation {
 103                 range: text_range(&line_index, code_lens.range)?,
 104                 kind: AnnotationKind::HasImpls { pos, data: None },
 105             })
 106         }
 107         lsp_ext::CodeLensResolveData::References(params) => {
 108             let pos @ FilePosition { file_id, .. } = file_position(snap, params)?;
 109             let line_index = snap.file_line_index(file_id)?;
 110
 111             Ok(Annotation {
 112                 range: text_range(&line_index, code_lens.range)?,
 113                 kind: AnnotationKind::HasReferences { pos, data: None },
 114             })
 115         }
 116     }
 117 }