8 files changed, 222 insertions, 236 deletions

diff --git a/crates/ra_ide_api/src/diagnostics.rs b/crates/ra_ide_api/src/diagnostics.rs
index e1c5a1b39..b9dc424c6 100644
--- a/crates/ra_ide_api/src/diagnostics.rs
+++ b/crates/ra_ide_api/src/diagnostics.rs
@@ -1,6 +1,5 @@
 use itertools::Itertools;
 use hir::{Problem, source_binder};
-use ra_ide_api_light::Severity;
 use ra_db::SourceDatabase;
 use ra_syntax::{
     Location, SourceFile, SyntaxKind, TextRange, SyntaxNode,
@@ -11,6 +10,12 @@ use ra_text_edit::{TextEdit, TextEditBuilder};
 
 use crate::{Diagnostic, FileId, FileSystemEdit, SourceChange, SourceFileEdit, db::RootDatabase};
 
+#[derive(Debug, Copy, Clone)]
+pub enum Severity {
+    Error,
+    WeakWarning,
+}
+
 pub(crate) fn diagnostics(db: &RootDatabase, file_id: FileId) -> Vec<Diagnostic> {
     let source_file = db.parse(file_id);
     let mut res = Vec::new();
diff --git a/crates/ra_ide_api/src/lib.rs b/crates/ra_ide_api/src/lib.rs
index a838c30da..99f18b6b8 100644
--- a/crates/ra_ide_api/src/lib.rs
+++ b/crates/ra_ide_api/src/lib.rs
@@ -37,6 +37,8 @@ mod line_index;
 mod folding_ranges;
 mod line_index_utils;
 mod join_lines;
+mod typing;
+mod matching_brace;
 
 #[cfg(test)]
 mod marks;
@@ -69,10 +71,10 @@ pub use crate::{
     line_index::{LineIndex, LineCol},
     line_index_utils::translate_offset_with_edit,
     folding_ranges::{Fold, FoldKind},
+    syntax_highlighting::HighlightedRange,
+    diagnostics::Severity,
 };
-pub use ra_ide_api_light::{
-    HighlightedRange, Severity, StructureNode, LocalEdit,
-};
+pub use ra_ide_api_light::StructureNode;
 pub use ra_db::{
     Canceled, CrateGraph, CrateId, FileId, FilePosition, FileRange, SourceRootId,
     Edition
@@ -266,7 +268,7 @@ impl Analysis {
     /// supported).
     pub fn matching_brace(&self, position: FilePosition) -> Option<TextUnit> {
         let file = self.db.parse(position.file_id);
-        ra_ide_api_light::matching_brace(&file, position.offset)
+        matching_brace::matching_brace(&file, position.offset)
     }
 
     /// Returns a syntax tree represented as `String`, for debug purposes.
@@ -294,9 +296,7 @@ impl Analysis {
     /// Returns an edit which should be applied when opening a new line, fixing
     /// up minor stuff like continuing the comment.
     pub fn on_enter(&self, position: FilePosition) -> Option<SourceChange> {
-        let file = self.db.parse(position.file_id);
-        let edit = ra_ide_api_light::on_enter(&file, position.offset)?;
-        Some(SourceChange::from_local_edit(position.file_id, edit))
+        typing::on_enter(&self.db, position)
     }
 
     /// Returns an edit which should be applied after `=` was typed. Primarily,
@@ -304,15 +304,18 @@ impl Analysis {
     // FIXME: use a snippet completion instead of this hack here.
     pub fn on_eq_typed(&self, position: FilePosition) -> Option<SourceChange> {
         let file = self.db.parse(position.file_id);
-        let edit = ra_ide_api_light::on_eq_typed(&file, position.offset)?;
-        Some(SourceChange::from_local_edit(position.file_id, edit))
+        let edit = typing::on_eq_typed(&file, position.offset)?;
+        Some(SourceChange {
+            label: "add semicolon".to_string(),
+            source_file_edits: vec![SourceFileEdit { edit, file_id: position.file_id }],
+            file_system_edits: vec![],
+            cursor_position: None,
+        })
     }
 
     /// Returns an edit which should be applied when a dot ('.') is typed on a blank line, indenting the line appropriately.
     pub fn on_dot_typed(&self, position: FilePosition) -> Option<SourceChange> {
-        let file = self.db.parse(position.file_id);
-        let edit = ra_ide_api_light::on_dot_typed(&file, position.offset)?;
-        Some(SourceChange::from_local_edit(position.file_id, edit))
+        typing::on_dot_typed(&self.db, position)
     }
 
     /// Returns a tree representation of symbols in the file. Useful to draw a
@@ -434,18 +437,6 @@ impl Analysis {
     }
 }
 
-impl SourceChange {
-    pub(crate) fn from_local_edit(file_id: FileId, edit: LocalEdit) -> SourceChange {
-        let file_edit = SourceFileEdit { file_id, edit: edit.edit };
-        SourceChange {
-            label: edit.label,
-            source_file_edits: vec![file_edit],
-            file_system_edits: vec![],
-            cursor_position: edit.cursor_position.map(|offset| FilePosition { offset, file_id }),
-        }
-    }
-}
-
 #[test]
 fn analysis_is_send() {
     fn is_send<T: Send>() {}
diff --git a/crates/ra_ide_api/src/matching_brace.rs b/crates/ra_ide_api/src/matching_brace.rs
new file mode 100644
index 000000000..d1405f14f
--- /dev/null
+++ b/crates/ra_ide_api/src/matching_brace.rs
@@ -0,0 +1,45 @@
+use ra_syntax::{
+    SourceFile, TextUnit,
+    algo::find_leaf_at_offset,
+    SyntaxKind::{self, *},
+    ast::AstNode,
+};
+
+pub fn matching_brace(file: &SourceFile, 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())
+}
+
+#[cfg(test)]
+mod tests {
+    use test_utils::{add_cursor, assert_eq_text, extract_offset};
+
+    use super::*;
+
+    #[test]
+    fn test_matching_brace() {
+        fn do_check(before: &str, after: &str) {
+            let (pos, before) = extract_offset(before);
+            let file = SourceFile::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, }");
+    }
+
+}
diff --git a/crates/ra_ide_api/src/snapshots/tests__highlighting.snap b/crates/ra_ide_api/src/snapshots/tests__highlighting.snap
new file mode 100644
index 000000000..72029e0ed
--- /dev/null
+++ b/crates/ra_ide_api/src/snapshots/tests__highlighting.snap
@@ -0,0 +1,34 @@
+---
+created: "2019-03-23T16:20:31.394314144Z"
+creator: [email protected]
+source: crates/ra_ide_api/src/syntax_highlighting.rs
+expression: result
+---
+Ok(
+    [
+        HighlightedRange {
+            range: [1; 11),
+            tag: "comment"
+        },
+        HighlightedRange {
+            range: [12; 14),
+            tag: "keyword"
+        },
+        HighlightedRange {
+            range: [15; 19),
+            tag: "function"
+        },
+        HighlightedRange {
+            range: [29; 37),
+            tag: "macro"
+        },
+        HighlightedRange {
+            range: [38; 50),
+            tag: "string"
+        },
+        HighlightedRange {
+            range: [52; 54),
+            tag: "literal"
+        }
+    ]
+)
diff --git a/crates/ra_ide_api/src/syntax_highlighting.rs b/crates/ra_ide_api/src/syntax_highlighting.rs
index fdd87bcff..a0c5e78ad 100644
--- a/crates/ra_ide_api/src/syntax_highlighting.rs
+++ b/crates/ra_ide_api/src/syntax_highlighting.rs
@@ -1,12 +1,81 @@
-use ra_syntax::AstNode;
+use rustc_hash::FxHashSet;
+
+use ra_syntax::{ast, AstNode, TextRange, Direction, SyntaxKind::*};
 use ra_db::SourceDatabase;
 
-use crate::{
-    FileId, HighlightedRange,
-    db::RootDatabase,
-};
+use crate::{FileId, db::RootDatabase};
+
+#[derive(Debug)]
+pub struct HighlightedRange {
+    pub range: TextRange,
+    pub tag: &'static str,
+}
 
 pub(crate) fn highlight(db: &RootDatabase, file_id: FileId) -> Vec<HighlightedRange> {
     let source_file = db.parse(file_id);
-    ra_ide_api_light::highlight(source_file.syntax())
+
+    // Visited nodes to handle highlighting priorities
+    let mut highlighted = FxHashSet::default();
+    let mut res = Vec::new();
+    for node in source_file.syntax().descendants() {
+        if highlighted.contains(&node) {
+            continue;
+        }
+        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",
+            _ => {
+                if let Some(macro_call) = ast::MacroCall::cast(node) {
+                    if let Some(path) = macro_call.path() {
+                        if let Some(segment) = path.segment() {
+                            if let Some(name_ref) = segment.name_ref() {
+                                highlighted.insert(name_ref.syntax());
+                                let range_start = name_ref.syntax().range().start();
+                                let mut range_end = name_ref.syntax().range().end();
+                                for sibling in path.syntax().siblings(Direction::Next) {
+                                    match sibling.kind() {
+                                        EXCL | IDENT => range_end = sibling.range().end(),
+                                        _ => (),
+                                    }
+                                }
+                                res.push(HighlightedRange {
+                                    range: TextRange::from_to(range_start, range_end),
+                                    tag: "macro",
+                                })
+                            }
+                        }
+                    }
+                }
+                continue;
+            }
+        };
+        res.push(HighlightedRange { range: node.range(), tag })
+    }
+    res
+}
+
+#[cfg(test)]
+mod tests {
+    use insta::assert_debug_snapshot_matches;
+
+    use crate::mock_analysis::single_file;
+
+    #[test]
+    fn test_highlighting() {
+        let (analysis, file_id) = single_file(
+            r#"
+// comment
+fn main() {}
+    println!("Hello, {}!", 92);
+"#,
+        );
+        let result = analysis.highlight(file_id);
+        assert_debug_snapshot_matches!("highlighting", result);
+    }
 }
diff --git a/crates/ra_ide_api_light/src/typing.rs b/crates/ra_ide_api/src/typing.rs
index c69270333..94b228466 100644
--- a/crates/ra_ide_api_light/src/typing.rs
+++ b/crates/ra_ide_api/src/typing.rs
@@ -5,30 +5,37 @@ use ra_syntax::{
     ast::{self, AstToken},
 };
 use ra_fmt::leading_indent;
-use crate::{LocalEdit, TextEditBuilder};
+use ra_text_edit::{TextEdit, TextEditBuilder};
+use ra_db::{FilePosition, SourceDatabase};
+use crate::{db::RootDatabase, SourceChange, SourceFileEdit};
 
-pub fn on_enter(file: &SourceFile, offset: TextUnit) -> Option<LocalEdit> {
-    let comment =
-        find_leaf_at_offset(file.syntax(), offset).left_biased().and_then(ast::Comment::cast)?;
+pub(crate) fn on_enter(db: &RootDatabase, position: FilePosition) -> Option<SourceChange> {
+    let file = db.parse(position.file_id);
+    let comment = find_leaf_at_offset(file.syntax(), position.offset)
+        .left_biased()
+        .and_then(ast::Comment::cast)?;
 
     if let ast::CommentFlavor::Multiline = comment.flavor() {
         return None;
     }
 
     let prefix = comment.prefix();
-    if offset < comment.syntax().range().start() + TextUnit::of_str(prefix) + TextUnit::from(1) {
+    if position.offset
+        < comment.syntax().range().start() + TextUnit::of_str(prefix) + TextUnit::from(1)
+    {
         return None;
     }
 
-    let indent = node_indent(file, comment.syntax())?;
+    let indent = node_indent(&file, comment.syntax())?;
     let inserted = format!("\n{}{} ", indent, prefix);
-    let cursor_position = offset + TextUnit::of_str(&inserted);
+    let cursor_position = position.offset + TextUnit::of_str(&inserted);
     let mut edit = TextEditBuilder::default();
-    edit.insert(offset, inserted);
-    Some(LocalEdit {
+    edit.insert(position.offset, inserted);
+    Some(SourceChange {
         label: "on enter".to_string(),
-        edit: edit.finish(),
-        cursor_position: Some(cursor_position),
+        source_file_edits: vec![SourceFileEdit { edit: edit.finish(), file_id: position.file_id }],
+        file_system_edits: vec![],
+        cursor_position: Some(FilePosition { offset: cursor_position, file_id: position.file_id }),
     })
 }
 
@@ -52,7 +59,7 @@ fn node_indent<'a>(file: &'a SourceFile, node: &SyntaxNode) -> Option<&'a str> {
     Some(&text[pos..])
 }
 
-pub fn on_eq_typed(file: &SourceFile, eq_offset: TextUnit) -> Option<LocalEdit> {
+pub fn on_eq_typed(file: &SourceFile, eq_offset: TextUnit) -> Option<TextEdit> {
     assert_eq!(file.syntax().text().char_at(eq_offset), Some('='));
     let let_stmt: &ast::LetStmt = find_node_at_offset(file.syntax(), eq_offset)?;
     if let_stmt.has_semi() {
@@ -72,17 +79,14 @@ pub fn on_eq_typed(file: &SourceFile, eq_offset: TextUnit) -> Option<LocalEdit>
     let offset = let_stmt.syntax().range().end();
     let mut edit = TextEditBuilder::default();
     edit.insert(offset, ";".to_string());
-    Some(LocalEdit {
-        label: "add semicolon".to_string(),
-        edit: edit.finish(),
-        cursor_position: None,
-    })
+    Some(edit.finish())
 }
 
-pub fn on_dot_typed(file: &SourceFile, dot_offset: TextUnit) -> Option<LocalEdit> {
-    assert_eq!(file.syntax().text().char_at(dot_offset), Some('.'));
+pub(crate) fn on_dot_typed(db: &RootDatabase, position: FilePosition) -> Option<SourceChange> {
+    let file = db.parse(position.file_id);
+    assert_eq!(file.syntax().text().char_at(position.offset), Some('.'));
 
-    let whitespace = find_leaf_at_offset(file.syntax(), dot_offset)
+    let whitespace = find_leaf_at_offset(file.syntax(), position.offset)
         .left_biased()
         .and_then(ast::Whitespace::cast)?;
 
@@ -103,15 +107,18 @@ pub fn on_dot_typed(file: &SourceFile, dot_offset: TextUnit) -> Option<LocalEdit
     }
     let mut edit = TextEditBuilder::default();
     edit.replace(
-        TextRange::from_to(dot_offset - current_indent_len, dot_offset),
+        TextRange::from_to(position.offset - current_indent_len, position.offset),
         target_indent.into(),
     );
-    let res = LocalEdit {
+    let res = SourceChange {
         label: "reindent dot".to_string(),
-        edit: edit.finish(),
-        cursor_position: Some(
-            dot_offset + target_indent_len - current_indent_len + TextUnit::of_char('.'),
-        ),
+        source_file_edits: vec![SourceFileEdit { edit: edit.finish(), file_id: position.file_id }],
+        file_system_edits: vec![],
+        cursor_position: Some(FilePosition {
+            offset: position.offset + target_indent_len - current_indent_len
+                + TextUnit::of_char('.'),
+            file_id: position.file_id,
+        }),
     };
     Some(res)
 }
@@ -120,6 +127,8 @@ pub fn on_dot_typed(file: &SourceFile, dot_offset: TextUnit) -> Option<LocalEdit
 mod tests {
     use test_utils::{add_cursor, assert_eq_text, extract_offset};
 
+    use crate::mock_analysis::single_file;
+
     use super::*;
 
     #[test]
@@ -131,7 +140,7 @@ mod tests {
             let before = edit.finish().apply(&before);
             let file = SourceFile::parse(&before);
             if let Some(result) = on_eq_typed(&file, offset) {
-                let actual = result.edit.apply(&before);
+                let actual = result.apply(&before);
                 assert_eq_text!(after, &actual);
             } else {
                 assert_eq_text!(&before, after)
@@ -177,9 +186,10 @@ fn foo() {
         let mut edit = TextEditBuilder::default();
         edit.insert(offset, ".".to_string());
         let before = edit.finish().apply(&before);
-        let file = SourceFile::parse(&before);
-        if let Some(result) = on_dot_typed(&file, offset) {
-            let actual = result.edit.apply(&before);
+        let (analysis, file_id) = single_file(&before);
+        if let Some(result) = analysis.on_dot_typed(FilePosition { offset, file_id }) {
+            assert_eq!(result.source_file_edits.len(), 1);
+            let actual = result.source_file_edits[0].edit.apply(&before);
             assert_eq_text!(after, &actual);
         } else {
             assert_eq_text!(&before, after)
@@ -358,10 +368,12 @@ fn foo() {
     fn test_on_enter() {
         fn apply_on_enter(before: &str) -> Option<String> {
             let (offset, before) = extract_offset(before);
-            let file = SourceFile::parse(&before);
-            let result = on_enter(&file, offset)?;
-            let actual = result.edit.apply(&before);
-            let actual = add_cursor(&actual, result.cursor_position.unwrap());
+            let (analysis, file_id) = single_file(&before);
+            let result = analysis.on_enter(FilePosition { offset, file_id })?;
+
+            assert_eq!(result.source_file_edits.len(), 1);
+            let actual = result.source_file_edits[0].edit.apply(&before);
+            let actual = add_cursor(&actual, result.cursor_position.unwrap().offset);
             Some(actual)
         }
 
diff --git a/crates/ra_ide_api_light/src/lib.rs b/crates/ra_ide_api_light/src/lib.rs
index f21a91e18..df7f144b6 100644
--- a/crates/ra_ide_api_light/src/lib.rs
+++ b/crates/ra_ide_api_light/src/lib.rs
@@ -4,147 +4,9 @@
 //! an edit or some auxiliary info.
 
 mod structure;
-mod typing;
 
-use rustc_hash::FxHashSet;
-use ra_text_edit::TextEditBuilder;
-use ra_syntax::{
-    SourceFile, SyntaxNode, TextRange, TextUnit, Direction,
-    algo::find_leaf_at_offset,
-    SyntaxKind::{self, *},
-    ast::{self, AstNode},
-};
+use ra_syntax::TextRange;
 
 pub use crate::{
     structure::{file_structure, StructureNode},
-    typing::{on_enter, on_dot_typed, on_eq_typed},
 };
-
-#[derive(Debug)]
-pub struct LocalEdit {
-    pub label: String,
-    pub edit: ra_text_edit::TextEdit,
-    pub cursor_position: Option<TextUnit>,
-}
-
-#[derive(Debug)]
-pub struct HighlightedRange {
-    pub range: TextRange,
-    pub tag: &'static str,
-}
-
-#[derive(Debug, Copy, Clone)]
-pub enum Severity {
-    Error,
-    WeakWarning,
-}
-
-#[derive(Debug)]
-pub struct Diagnostic {
-    pub range: TextRange,
-    pub msg: String,
-    pub severity: Severity,
-    pub fix: Option<LocalEdit>,
-}
-
-pub fn matching_brace(file: &SourceFile, 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(root: &SyntaxNode) -> Vec<HighlightedRange> {
-    // Visited nodes to handle highlighting priorities
-    let mut highlighted = FxHashSet::default();
-    let mut res = Vec::new();
-    for node in root.descendants() {
-        if highlighted.contains(&node) {
-            continue;
-        }
-        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",
-            _ => {
-                if let Some(macro_call) = ast::MacroCall::cast(node) {
-                    if let Some(path) = macro_call.path() {
-                        if let Some(segment) = path.segment() {
-                            if let Some(name_ref) = segment.name_ref() {
-                                highlighted.insert(name_ref.syntax());
-                                let range_start = name_ref.syntax().range().start();
-                                let mut range_end = name_ref.syntax().range().end();
-                                for sibling in path.syntax().siblings(Direction::Next) {
-                                    match sibling.kind() {
-                                        EXCL | IDENT => range_end = sibling.range().end(),
-                                        _ => (),
-                                    }
-                                }
-                                res.push(HighlightedRange {
-                                    range: TextRange::from_to(range_start, range_end),
-                                    tag: "macro",
-                                })
-                            }
-                        }
-                    }
-                }
-                continue;
-            }
-        };
-        res.push(HighlightedRange { range: node.range(), tag })
-    }
-    res
-}
-
-#[cfg(test)]
-mod tests {
-    use ra_syntax::AstNode;
-    use insta::assert_debug_snapshot_matches;
-
-    use test_utils::{add_cursor, assert_eq_text, extract_offset};
-
-    use super::*;
-
-    #[test]
-    fn test_highlighting() {
-        let file = SourceFile::parse(
-            r#"
-// comment
-fn main() {}
-    println!("Hello, {}!", 92);
-"#,
-        );
-        let hls = highlight(file.syntax());
-        assert_debug_snapshot_matches!("highlighting", hls);
-    }
-
-    #[test]
-    fn test_matching_brace() {
-        fn do_check(before: &str, after: &str) {
-            let (pos, before) = extract_offset(before);
-            let file = SourceFile::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, }");
-    }
-
-}
diff --git a/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap b/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap
deleted file mode 100644
index ef306a7a0..000000000
--- a/crates/ra_ide_api_light/src/snapshots/tests__highlighting.snap
+++ /dev/null
@@ -1,32 +0,0 @@
----
-created: "2019-01-22T14:45:01.959724300+00:00"
-creator: [email protected]
-expression: hls
-source: "crates\\ra_ide_api_light\\src\\lib.rs"
----
-[
-    HighlightedRange {
-        range: [1; 11),
-        tag: "comment"
-    },
-    HighlightedRange {
-        range: [12; 14),
-        tag: "keyword"
-    },
-    HighlightedRange {
-        range: [15; 19),
-        tag: "function"
-    },
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