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extern crate itertools;
extern crate join_to_string;
extern crate ra_syntax;
extern crate rustc_hash;
extern crate superslice;
#[cfg(test)]
#[macro_use]
extern crate test_utils as _test_utils;
mod code_actions;
mod edit;
mod extend_selection;
mod folding_ranges;
mod line_index;
mod symbols;
#[cfg(test)]
mod test_utils;
mod typing;
pub use self::{
code_actions::{add_derive, add_impl, flip_comma, introduce_variable, LocalEdit},
edit::{Edit, EditBuilder},
extend_selection::extend_selection,
folding_ranges::{folding_ranges, Fold, FoldKind},
line_index::{LineCol, LineIndex},
symbols::{file_structure, file_symbols, FileSymbol, StructureNode},
typing::{join_lines, on_enter, on_eq_typed},
};
pub use ra_syntax::AtomEdit;
use ra_syntax::{
algo::find_leaf_at_offset,
ast::{self, AstNode, NameOwner},
File,
Location,
SyntaxKind::{self, *},
SyntaxNodeRef, TextRange, TextUnit,
};
#[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 => "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> {
fn location_to_range(location: Location) -> TextRange {
match location {
Location::Offset(offset) => TextRange::offset_len(offset, 1.into()),
Location::Range(range) => range,
}
}
file.errors()
.into_iter()
.map(|err| Diagnostic {
range: location_to_range(err.location()),
msg: format!("Syntax Error: {}", err),
})
.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()
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_utils::{add_cursor, assert_eq_dbg, extract_offset};
#[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, }");
}
}
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