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use new translate_offset_with_edit for TryConvWith

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This commit is contained in:
Bernardo 2018-12-23 15:49:14 +01:00
parent aff0124b37
commit 6b2da4e547
4 changed files with 5 additions and 37 deletions
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37
crates/ra_lsp_server/src/conv.rs
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@ -3,7 +3,7 @@ use languageserver_types::{
TextDocumentItem, TextDocumentPositionParams, Url, VersionedTextDocumentIdentifier, InsertTextFormat,
};
use ra_analysis::{FileId, FileSystemEdit, SourceChange, SourceFileEdit, FilePosition, CompletionItem, CompletionItemKind, InsertText};
use ra_editor::{LineCol, LineIndex};
use ra_editor::{LineCol, LineIndex, translate_offset_with_edit};
use ra_text_edit::{AtomTextEdit, TextEdit};
use ra_syntax::{SyntaxKind, TextRange, TextUnit};
@ -261,41 +261,6 @@ impl TryConvWith for SourceChange {
}
}
// HACK: we should translate offset to line/column using linde_index *with edits applied*.
// A naive version of this function would be to apply `edits` to the original text,
// construct a new line index and use that, but it would be slow.
//
// Writing fast & correct version is issue #105, let's use a quick hack in the meantime
fn translate_offset_with_edit(
pre_edit_index: &LineIndex,
offset: TextUnit,
edits: &[AtomTextEdit],
) -> LineCol {
let fallback = pre_edit_index.line_col(offset);
let edit = match edits.first() {
None => return fallback,
Some(edit) => edit,
};
let end_offset = edit.delete.start() + TextUnit::of_str(&edit.insert);
if !(edit.delete.start() <= offset && offset <= end_offset) {
return fallback;
}
let rel_offset = offset - edit.delete.start();
let in_edit_line_col = LineIndex::new(&edit.insert).line_col(rel_offset);
let edit_line_col = pre_edit_index.line_col(edit.delete.start());
if in_edit_line_col.line == 0 {
LineCol {
line: edit_line_col.line,
col_utf16: edit_line_col.col_utf16 + in_edit_line_col.col_utf16,
}
} else {
LineCol {
line: edit_line_col.line + in_edit_line_col.line,
col_utf16: in_edit_line_col.col_utf16,
}
}
}
impl TryConvWith for SourceFileEdit {
type Ctx = ServerWorld;
type Output = TextDocumentEdit;