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extern crate ra_syntax;
extern crate superslice;
extern crate itertools;
extern crate join_to_string;
extern crate rustc_hash;
#[cfg(test)]
#[macro_use]
extern crate test_utils as _test_utils;
mod extend_selection;
mod symbols;
mod line_index;
mod edit;
mod folding_ranges;
mod code_actions;
mod typing;
mod completion;
mod scope;
#[cfg(test)]
mod test_utils;
use ra_syntax::{
File, TextUnit, TextRange, SmolStr, SyntaxNodeRef,
ast::{self, AstNode, NameOwner},
algo::find_leaf_at_offset,
SyntaxKind::{self, *},
};
pub use ra_syntax::AtomEdit;
pub use self::{
line_index::{LineIndex, LineCol},
extend_selection::extend_selection,
symbols::{StructureNode, file_structure, FileSymbol, file_symbols},
edit::{EditBuilder, Edit},
code_actions::{
LocalEdit,
flip_comma, add_derive, add_impl,
introduce_variable,
},
typing::{join_lines, on_eq_typed, on_enter},
completion::{scope_completion, CompletionItem},
folding_ranges::{Fold, FoldKind, folding_ranges}
};
#[derive(Debug)]
pub struct HighlightedRange {
pub range: TextRange,
pub tag: &'static str,
}
#[derive(Debug)]
pub struct Diagnostic {
pub range: TextRange,
pub msg: String,
}
#[derive(Debug)]
pub struct Runnable {
pub range: TextRange,
pub kind: RunnableKind,
}
#[derive(Debug)]
pub enum RunnableKind {
Test { name: String },
Bin,
}
pub fn matching_brace(file: &File, offset: TextUnit) -> Option<TextUnit> {
const BRACES: &[SyntaxKind] = &[
L_CURLY, R_CURLY,
L_BRACK, R_BRACK,
L_PAREN, R_PAREN,
L_ANGLE, R_ANGLE,
];
let (brace_node, brace_idx) = find_leaf_at_offset(file.syntax(), offset)
.filter_map(|node| {
let idx = BRACES.iter().position(|&brace| brace == node.kind())?;
Some((node, idx))
})
.next()?;
let parent = brace_node.parent()?;
let matching_kind = BRACES[brace_idx ^ 1];
let matching_node = parent.children()
.find(|node| node.kind() == matching_kind)?;
Some(matching_node.range().start())
}
pub fn highlight(file: &File) -> Vec<HighlightedRange> {
let mut res = Vec::new();
for node in file.syntax().descendants() {
let tag = match node.kind() {
COMMENT | DOC_COMMENT => "comment",
STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => "string",
ATTR => "attribute",
NAME_REF => "text",
NAME => "function",
INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE => "literal",
LIFETIME => "parameter",
k if k.is_keyword() => "keyword",
_ => continue,
};
res.push(HighlightedRange {
range: node.range(),
tag,
})
}
res
}
pub fn diagnostics(file: &File) -> Vec<Diagnostic> {
file.errors().into_iter().map(|err| Diagnostic {
range: TextRange::offset_len(err.offset, 1.into()),
msg: "Syntax Error: ".to_string() + &err.msg,
}).collect()
}
pub fn syntax_tree(file: &File) -> String {
::ra_syntax::utils::dump_tree(file.syntax())
}
pub fn runnables(file: &File) -> Vec<Runnable> {
file.syntax().descendants()
.filter_map(ast::FnDef::cast)
.filter_map(|f| {
let name = f.name()?.text();
let kind = if name == "main" {
RunnableKind::Bin
} else if f.has_atom_attr("test") {
RunnableKind::Test {
name: name.to_string()
}
} else {
return None;
};
Some(Runnable {
range: f.syntax().range(),
kind,
})
})
.collect()
}
pub fn find_node_at_offset<'a, N: AstNode<'a>>(
syntax: SyntaxNodeRef<'a>,
offset: TextUnit,
) -> Option<N> {
let leaves = find_leaf_at_offset(syntax, offset);
let leaf = leaves.clone()
.find(|leaf| !leaf.kind().is_trivia())
.or_else(|| leaves.right_biased())?;
leaf.ancestors()
.filter_map(N::cast)
.next()
}
pub fn resolve_local_name(file: &File, offset: TextUnit, name_ref: ast::NameRef) -> Option<(SmolStr, TextRange)> {
let fn_def = find_node_at_offset::<ast::FnDef>(file.syntax(), offset)?;
let scopes = scope::FnScopes::new(fn_def);
let scope_entry = scope::resolve_local_name(name_ref, &scopes)?;
let name = scope_entry.ast().name()?;
Some((scope_entry.name(), name.syntax().range()))
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_utils::{assert_eq_dbg, extract_offset, add_cursor};
#[test]
fn test_highlighting() {
let file = File::parse(r#"
// comment
fn main() {}
println!("Hello, {}!", 92);
"#);
let hls = highlight(&file);
assert_eq_dbg(
r#"[HighlightedRange { range: [1; 11), tag: "comment" },
HighlightedRange { range: [12; 14), tag: "keyword" },
HighlightedRange { range: [15; 19), tag: "function" },
HighlightedRange { range: [29; 36), tag: "text" },
HighlightedRange { range: [38; 50), tag: "string" },
HighlightedRange { range: [52; 54), tag: "literal" }]"#,
&hls,
);
}
#[test]
fn test_runnables() {
let file = File::parse(r#"
fn main() {}
#[test]
fn test_foo() {}
#[test]
#[ignore]
fn test_foo() {}
"#);
let runnables = runnables(&file);
assert_eq_dbg(
r#"[Runnable { range: [1; 13), kind: Bin },
Runnable { range: [15; 39), kind: Test { name: "test_foo" } },
Runnable { range: [41; 75), kind: Test { name: "test_foo" } }]"#,
&runnables,
)
}
#[test]
fn test_matching_brace() {
fn do_check(before: &str, after: &str) {
let (pos, before) = extract_offset(before);
let file = File::parse(&before);
let new_pos = match matching_brace(&file, pos) {
None => pos,
Some(pos) => pos,
};
let actual = add_cursor(&before, new_pos);
assert_eq_text!(after, &actual);
}
do_check(
"struct Foo { a: i32, }<|>",
"struct Foo <|>{ a: i32, }",
);
}
}
|
