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Add ra_ide_api::expand

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This module should handle all tricky bits with mapping macro-expanded
HirFileId to original files the user actually can see in the editor
This commit is contained in:
Aleksey Kladov 2019-11-18 14:23:24 +03:00
parent 6d8ca870b3
commit 9fcd98e956
4 changed files with 69 additions and 55 deletions
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54
crates/ra_ide_api/src/display/navigation_target.rs
View file

@ -9,8 +9,9 @@ use ra_syntax::{
SyntaxNode, TextRange,
};
use crate::{db::RootDatabase, expand::original_range, FileSymbol};
use super::short_label::ShortLabel;
use crate::{db::RootDatabase, FileSymbol};
/// `NavigationTarget` represents and element in the editor's UI which you can
/// click on to navigate to a particular piece of code.
@ -79,13 +80,12 @@ impl NavigationTarget {
pub(crate) fn from_module_to_decl(db: &RootDatabase, module: hir::Module) -> NavigationTarget {
let name = module.name(db).map(|it| it.to_string().into()).unwrap_or_default();
if let Some(src) = module.declaration_source(db) {
let (file_id, text_range) =
find_range_from_node(db, src.as_ref().map(|it| it.syntax()));
let frange = original_range(db, src.as_ref().map(|it| it.syntax()));
return NavigationTarget::from_syntax(
file_id,
frange.file_id,
name,
None,
text_range,
frange.range,
src.ast.syntax(),
src.ast.doc_comment_text(),
src.ast.short_label(),
@ -149,14 +149,14 @@ impl NavigationTarget {
//FIXME: use `_` instead of empty string
let name = node.name().map(|it| it.text().clone()).unwrap_or_default();
let focus_range =
node.name().map(|it| find_range_from_node(db, Source::new(file_id, it.syntax())).1);
let (file_id, full_range) = find_range_from_node(db, Source::new(file_id, node.syntax()));
node.name().map(|it| original_range(db, Source::new(file_id, it.syntax())).range);
let frange = original_range(db, Source::new(file_id, node.syntax()));
NavigationTarget::from_syntax(
file_id,
frange.file_id,
name,
focus_range,
full_range,
frange.range,
node.syntax(),
docs,
description,
@ -234,26 +234,26 @@ impl ToNav for hir::Module {
let name = self.name(db).map(|it| it.to_string().into()).unwrap_or_default();
match &src.ast {
ModuleSource::SourceFile(node) => {
let (file_id, text_range) = find_range_from_node(db, src.with_ast(node.syntax()));
let frange = original_range(db, src.with_ast(node.syntax()));
NavigationTarget::from_syntax(
file_id,
frange.file_id,
name,
None,
text_range,
frange.range,
node.syntax(),
None,
None,
)
}
ModuleSource::Module(node) => {
let (file_id, text_range) = find_range_from_node(db, src.with_ast(node.syntax()));
let frange = original_range(db, src.with_ast(node.syntax()));
NavigationTarget::from_syntax(
file_id,
frange.file_id,
name,
None,
text_range,
frange.range,
node.syntax(),
node.doc_comment_text(),
node.short_label(),
@ -266,13 +266,13 @@ impl ToNav for hir::Module {
impl ToNav for hir::ImplBlock {
fn to_nav(&self, db: &RootDatabase) -> NavigationTarget {
let src = self.source(db);
let (file_id, text_range) = find_range_from_node(db, src.as_ref().map(|it| it.syntax()));
let frange = original_range(db, src.as_ref().map(|it| it.syntax()));
NavigationTarget::from_syntax(
file_id,
frange.file_id,
"impl".into(),
None,
text_range,
frange.range,
src.ast.syntax(),
None,
None,
@ -293,12 +293,12 @@ impl ToNav for hir::StructField {
it.short_label(),
),
FieldSource::Pos(it) => {
let (file_id, text_range) = find_range_from_node(db, src.with_ast(it.syntax()));
let frange = original_range(db, src.with_ast(it.syntax()));
NavigationTarget::from_syntax(
file_id,
frange.file_id,
"".into(),
None,
text_range,
frange.range,
it.syntax(),
None,
None,
@ -362,18 +362,6 @@ impl ToNav for hir::Local {
}
}
fn find_range_from_node(db: &RootDatabase, node: Source<&SyntaxNode>) -> (FileId, TextRange) {
let text_range = node.ast.text_range();
let (file_id, text_range) = node
.file_id
.expansion_info(db)
.and_then(|expansion_info| expansion_info.find_range(text_range))
.unwrap_or((node.file_id, text_range));
// FIXME: handle recursive macro generated macro
(file_id.original_file(db), text_range)
}
pub(crate) fn docs_from_symbol(db: &RootDatabase, symbol: &FileSymbol) -> Option<String> {
let parse = db.parse(symbol.file_id);
let node = symbol.ptr.to_node(parse.tree().syntax());

42
crates/ra_ide_api/src/expand.rs Normal file
View file

@ -0,0 +1,42 @@
//! Utilities to work with files, produced by macros.
use std::iter::successors;
use hir::Source;
use ra_db::FileId;
use ra_syntax::{ast, AstNode, SyntaxNode, SyntaxToken};
use crate::{db::RootDatabase, FileRange};
pub(crate) fn original_range(db: &RootDatabase, node: Source<&SyntaxNode>) -> FileRange {
let text_range = node.ast.text_range();
let (file_id, range) = node
.file_id
.expansion_info(db)
.and_then(|expansion_info| expansion_info.find_range(text_range))
.unwrap_or((node.file_id, text_range));
// FIXME: handle recursive macro generated macro
FileRange { file_id: file_id.original_file(db), range }
}
pub(crate) fn descend_into_macros(
db: &RootDatabase,
file_id: FileId,
token: SyntaxToken,
) -> Source<SyntaxToken> {
let src = Source::new(file_id.into(), token);
successors(Some(src), |token| {
let macro_call = token.ast.ancestors().find_map(ast::MacroCall::cast)?;
let tt = macro_call.token_tree()?;
if !token.ast.text_range().is_subrange(&tt.syntax().text_range()) {
return None;
}
let source_analyzer =
hir::SourceAnalyzer::new(db, token.with_ast(token.ast.parent()).as_ref(), None);
let exp = source_analyzer.expand(db, &macro_call)?;
exp.map_token_down(db, token.as_ref())
})
.last()
.unwrap()
}

27
crates/ra_ide_api/src/goto_definition.rs
View file

@ -1,16 +1,15 @@
//! FIXME: write short doc here
use std::iter::successors;
use hir::{db::AstDatabase, Source};
use ra_syntax::{
ast::{self, DocCommentsOwner},
match_ast, AstNode, SyntaxNode, SyntaxToken,
match_ast, AstNode, SyntaxNode,
};
use crate::{
db::RootDatabase,
display::{ShortLabel, ToNav},
expand::descend_into_macros,
references::{classify_name_ref, NameKind::*},
FilePosition, NavigationTarget, RangeInfo,
};
@ -19,7 +18,9 @@ pub(crate) fn goto_definition(
db: &RootDatabase,
position: FilePosition,
) -> Option<RangeInfo<Vec<NavigationTarget>>> {
let token = descend_into_macros(db, position)?;
let file = db.parse_or_expand(position.file_id.into())?;
let token = file.token_at_offset(position.offset).filter(|it| !it.kind().is_trivia()).next()?;
let token = descend_into_macros(db, position.file_id, token);
let res = match_ast! {
match (token.ast.parent()) {
@ -39,24 +40,6 @@ pub(crate) fn goto_definition(
Some(res)
}
fn descend_into_macros(db: &RootDatabase, position: FilePosition) -> Option<Source<SyntaxToken>> {
let file = db.parse_or_expand(position.file_id.into())?;
let token = file.token_at_offset(position.offset).filter(|it| !it.kind().is_trivia()).next()?;
successors(Some(Source::new(position.file_id.into(), token)), |token| {
let macro_call = token.ast.ancestors().find_map(ast::MacroCall::cast)?;
let tt = macro_call.token_tree()?;
if !token.ast.text_range().is_subrange(&tt.syntax().text_range()) {
return None;
}
let source_analyzer =
hir::SourceAnalyzer::new(db, token.with_ast(token.ast.parent()).as_ref(), None);
let exp = source_analyzer.expand(db, &macro_call)?;
exp.map_token_down(db, token.as_ref())
})
.last()
}
#[derive(Debug)]
pub(crate) enum ReferenceResult {
Exact(NavigationTarget),

1
crates/ra_ide_api/src/lib.rs
View file

@ -41,6 +41,7 @@ mod matching_brace;
mod display;
mod inlay_hints;
mod wasm_shims;
mod expand;
#[cfg(test)]
mod marks;