streamline API

crates/ra_assists/src/assist_ctx.rs

@@ -2,8 +2,9 @@
 use ra_db::FileRange;
 use ra_fmt::{leading_indent, reindent};
 use ra_syntax::{
-    algo::{find_covering_element, find_node_at_offset, find_token_at_offset, TokenAtOffset},
+    algo::{find_covering_element, find_node_at_offset},
     AstNode, SourceFile, SyntaxElement, SyntaxNode, SyntaxToken, TextRange, TextUnit,
+    TokenAtOffset,
 };
 use ra_text_edit::TextEditBuilder;
 
@@ -105,7 +106,7 @@ pub(crate) fn build(self) -> Option<Assist> {
     }
 
     pub(crate) fn token_at_offset(&self) -> TokenAtOffset<SyntaxToken> {
-        find_token_at_offset(self.source_file.syntax(), self.frange.range.start())
+        self.source_file.syntax().token_at_offset(self.frange.range.start())
     }
 
     pub(crate) fn node_at_offset<N: AstNode>(&self) -> Option<N> {

crates/ra_hir/src/ty/tests.rs

@@ -3211,8 +3211,7 @@ fn foo() -> i32 {
     );
     {
         let file = db.parse(pos.file_id).ok().unwrap();
-        let node =
-            algo::find_token_at_offset(file.syntax(), pos.offset).right_biased().unwrap().parent();
+        let node = file.syntax().token_at_offset(pos.offset).right_biased().unwrap().parent();
         let events = db.log_executed(|| {
             SourceAnalyzer::new(&db, pos.file_id, &node, None);
         });
@@ -3232,8 +3231,7 @@ fn foo() -> i32 {
 
     {
         let file = db.parse(pos.file_id).ok().unwrap();
-        let node =
-            algo::find_token_at_offset(file.syntax(), pos.offset).right_biased().unwrap().parent();
+        let node = file.syntax().token_at_offset(pos.offset).right_biased().unwrap().parent();
         let events = db.log_executed(|| {
             SourceAnalyzer::new(&db, pos.file_id, &node, None);
         });

crates/ra_ide_api/src/completion/completion_context.rs

@@ -1,6 +1,6 @@
 use hir::source_binder;
 use ra_syntax::{
-    algo::{find_covering_element, find_node_at_offset, find_token_at_offset},
+    algo::{find_covering_element, find_node_at_offset},
     ast, AstNode, Parse, SourceFile,
     SyntaxKind::*,
     SyntaxNode, SyntaxToken, TextRange, TextUnit,
@@ -48,7 +48,7 @@ pub(super) fn new(
     ) -> Option<CompletionContext<'a>> {
         let module = source_binder::module_from_position(db, position);
         let token =
-            find_token_at_offset(original_parse.tree().syntax(), position.offset).left_biased()?;
+            original_parse.tree().syntax().token_at_offset(position.offset).left_biased()?;
         let analyzer =
             hir::SourceAnalyzer::new(db, position.file_id, &token.parent(), Some(position.offset));
         let mut ctx = CompletionContext {

crates/ra_ide_api/src/extend_selection.rs

@@ -1,10 +1,10 @@
 use ra_db::SourceDatabase;
 use ra_syntax::{
-    algo::{find_covering_element, find_token_at_offset, TokenAtOffset},
+    algo::find_covering_element,
     ast::{self, AstNode, AstToken},
     Direction, NodeOrToken,
     SyntaxKind::*,
-    SyntaxNode, SyntaxToken, TextRange, TextUnit, T,
+    SyntaxNode, SyntaxToken, TextRange, TextUnit, TokenAtOffset, T,
 };
 
 use crate::{db::RootDatabase, FileRange};
@@ -34,7 +34,7 @@ fn try_extend_selection(root: &SyntaxNode, range: TextRange) -> Option<TextRange
 
     if range.is_empty() {
         let offset = range.start();
-        let mut leaves = find_token_at_offset(root, offset);
+        let mut leaves = root.token_at_offset(offset);
         if leaves.clone().all(|it| it.kind() == WHITESPACE) {
             return Some(extend_ws(root, leaves.next()?, offset));
         }

crates/ra_ide_api/src/goto_type_definition.rs

@@ -1,5 +1,5 @@
 use ra_db::SourceDatabase;
-use ra_syntax::{algo::find_token_at_offset, ast, AstNode};
+use ra_syntax::{ast, AstNode};
 
 use crate::{db::RootDatabase, FilePosition, NavigationTarget, RangeInfo};
 
@@ -9,7 +9,7 @@ pub(crate) fn goto_type_definition(
 ) -> Option<RangeInfo<Vec<NavigationTarget>>> {
     let parse = db.parse(position.file_id);
 
-    let node = find_token_at_offset(parse.tree().syntax(), position.offset).find_map(|token| {
+    let node = parse.tree().syntax().token_at_offset(position.offset).find_map(|token| {
         token
             .parent()
             .ancestors()

crates/ra_ide_api/src/matching_brace.rs

@@ -1,9 +1,11 @@
-use ra_syntax::{algo::find_token_at_offset, ast::AstNode, SourceFile, SyntaxKind, TextUnit, T};
+use ra_syntax::{ast::AstNode, SourceFile, SyntaxKind, TextUnit, T};
 
 pub fn matching_brace(file: &SourceFile, offset: TextUnit) -> Option<TextUnit> {
     const BRACES: &[SyntaxKind] =
         &[T!['{'], T!['}'], T!['['], T![']'], T!['('], T![')'], T![<], T![>]];
-    let (brace_node, brace_idx) = find_token_at_offset(file.syntax(), offset)
+    let (brace_node, brace_idx) = file
+        .syntax()
+        .token_at_offset(offset)
         .filter_map(|node| {
             let idx = BRACES.iter().position(|&brace| brace == node.kind())?;
             Some((node, idx))

crates/ra_ide_api/src/typing.rs

@@ -1,11 +1,11 @@
 use ra_db::{FilePosition, SourceDatabase};
 use ra_fmt::leading_indent;
 use ra_syntax::{
-    algo::{find_node_at_offset, find_token_at_offset, TokenAtOffset},
+    algo::find_node_at_offset,
     ast::{self, AstToken},
     AstNode, SmolStr, SourceFile,
     SyntaxKind::*,
-    SyntaxToken, TextRange, TextUnit,
+    SyntaxToken, TextRange, TextUnit, TokenAtOffset,
 };
 use ra_text_edit::{TextEdit, TextEditBuilder};
 
@@ -14,7 +14,9 @@
 pub(crate) fn on_enter(db: &RootDatabase, position: FilePosition) -> Option<SourceChange> {
     let parse = db.parse(position.file_id);
     let file = parse.tree();
-    let comment = find_token_at_offset(file.syntax(), position.offset)
+    let comment = file
+        .syntax()
+        .token_at_offset(position.offset)
         .left_biased()
         .and_then(ast::Comment::cast)?;
 
@@ -45,7 +47,7 @@ pub(crate) fn on_enter(db: &RootDatabase, position: FilePosition) -> Option<Sour
 }
 
 fn node_indent(file: &SourceFile, token: &SyntaxToken) -> Option<SmolStr> {
-    let ws = match find_token_at_offset(file.syntax(), token.text_range().start()) {
+    let ws = match file.syntax().token_at_offset(token.text_range().start()) {
         TokenAtOffset::Between(l, r) => {
             assert!(r == *token);
             l
@@ -91,7 +93,10 @@ pub(crate) fn on_dot_typed(db: &RootDatabase, position: FilePosition) -> Option<
     let parse = db.parse(position.file_id);
     assert_eq!(parse.tree().syntax().text().char_at(position.offset), Some('.'));
 
-    let whitespace = find_token_at_offset(parse.tree().syntax(), position.offset)
+    let whitespace = parse
+        .tree()
+        .syntax()
+        .token_at_offset(position.offset)
         .left_biased()
         .and_then(ast::Whitespace::cast)?;
 

crates/ra_syntax/src/algo.rs

@@ -5,16 +5,9 @@
 use itertools::Itertools;
 
 use crate::{
-    AstNode, Direction, NodeOrToken, SourceFile, SyntaxElement, SyntaxNode, SyntaxNodePtr,
-    SyntaxToken, TextRange, TextUnit,
+    AstNode, Direction, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxNodePtr, TextRange, TextUnit,
 };
 
-pub use rowan::TokenAtOffset;
-
-pub fn find_token_at_offset(node: &SyntaxNode, offset: TextUnit) -> TokenAtOffset<SyntaxToken> {
-    node.token_at_offset(offset)
-}
-
 /// Returns ancestors of the node at the offset, sorted by length. This should
 /// do the right thing at an edge, e.g. when searching for expressions at `{
 /// <|>foo }` we will get the name reference instead of the whole block, which
@@ -24,7 +17,7 @@ pub fn ancestors_at_offset(
     node: &SyntaxNode,
     offset: TextUnit,
 ) -> impl Iterator<Item = SyntaxNode> {
-    find_token_at_offset(node, offset)
+    node.token_at_offset(offset)
         .map(|token| token.parent().ancestors())
         .kmerge_by(|node1, node2| node1.text_range().len() < node2.text_range().len())
 }
@@ -137,14 +130,14 @@ fn with_children(
     let len = new_children.iter().map(|it| it.text_len()).sum::<TextUnit>();
     let new_node =
         rowan::GreenNode::new(rowan::cursor::SyntaxKind(parent.kind() as u16), new_children);
-    let new_file_node = parent.replace_with(new_node);
-    let file = SourceFile::new(new_file_node);
+    let new_root_node = parent.replace_with(new_node);
+    let new_root_node = SyntaxNode::new_root(new_root_node);
 
     // FIXME: use a more elegant way to re-fetch the node (#1185), make
     // `range` private afterwards
     let mut ptr = SyntaxNodePtr::new(parent);
     ptr.range = TextRange::offset_len(ptr.range().start(), len);
-    ptr.to_node(file.syntax()).to_owned()
+    ptr.to_node(&new_root_node)
 }
 
 fn position_of_child(parent: &SyntaxNode, child: SyntaxElement) -> usize {

crates/ra_syntax/src/lib.rs

@@ -44,12 +44,10 @@
     syntax_error::{Location, SyntaxError, SyntaxErrorKind},
     syntax_node::{
         Direction, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxToken, SyntaxTreeBuilder,
-        WalkEvent,
     },
 };
-pub use ra_parser::SyntaxKind;
-pub use ra_parser::T;
-pub use rowan::{SmolStr, SyntaxText, TextRange, TextUnit};
+pub use ra_parser::{SyntaxKind, T};
+pub use rowan::{SmolStr, SyntaxText, TextRange, TextUnit, TokenAtOffset, WalkEvent};
 
 /// `Parse` is the result of the parsing: a syntax tree and a collection of
 /// errors.

crates/ra_syntax/src/syntax_node.rs

@@ -14,7 +14,6 @@
     Parse, SmolStr, SyntaxKind, TextUnit,
 };
 
-pub use rowan::WalkEvent;
 pub(crate) use rowan::{GreenNode, GreenToken};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]