Transition OnEnter to WorkspaceSnippetEdit

This also changes our handiling of snippet edits on the client side.
`editor.insertSnippet` unfortunately forces indentation, which we
really don't want to have to deal with. So, let's just implement our
manual hacky way of dealing with a simple subset of snippets we
actually use in rust-analyzer

4 files changed, 44 insertions, 59 deletions

diff --git a/crates/ra_ide/src/typing/on_enter.rs b/crates/ra_ide/src/typing/on_enter.rs
index 78a40cc94..85be14ad3 100644
--- a/crates/ra_ide/src/typing/on_enter.rs
+++ b/crates/ra_ide/src/typing/on_enter.rs
@@ -38,17 +38,15 @@ pub(crate) fn on_enter(db: &RootDatabase, position: FilePosition) -> Option<Sour
     }
 
     let indent = node_indent(&file, comment.syntax())?;
-    let inserted = format!("\n{}{} ", indent, prefix);
-    let cursor_position = position.offset + TextSize::of(&inserted);
+    let inserted = format!("\n{}{} $0", indent, prefix);
     let edit = TextEdit::insert(position.offset, inserted);
 
-    Some(
-        SourceChange::source_file_edit(
-            "On enter",
-            SourceFileEdit { edit, file_id: position.file_id },
-        )
-        .with_cursor(FilePosition { offset: cursor_position, file_id: position.file_id }),
-    )
+    let mut res = SourceChange::source_file_edit(
+        "On enter",
+        SourceFileEdit { edit, file_id: position.file_id },
+    );
+    res.is_snippet = true;
+    Some(res)
 }
 
 fn followed_by_comment(comment: &ast::Comment) -> bool {
@@ -84,7 +82,7 @@ fn node_indent(file: &SourceFile, token: &SyntaxToken) -> Option<SmolStr> {
 
 #[cfg(test)]
 mod tests {
-    use test_utils::{add_cursor, assert_eq_text, extract_offset};
+    use test_utils::{assert_eq_text, extract_offset};
 
     use crate::mock_analysis::single_file;
 
@@ -98,7 +96,6 @@ mod tests {
         assert_eq!(result.source_file_edits.len(), 1);
         let mut actual = before.to_string();
         result.source_file_edits[0].edit.apply(&mut actual);
-        let actual = add_cursor(&actual, result.cursor_position.unwrap().offset);
         Some(actual)
     }
 
@@ -121,7 +118,7 @@ fn foo() {
 ",
             r"
 /// Some docs
-/// <|>
+/// $0
 fn foo() {
 }
 ",
@@ -137,7 +134,7 @@ impl S {
             r"
 impl S {
     /// Some
-    /// <|> docs.
+    /// $0 docs.
     fn foo() {}
 }
 ",
@@ -151,7 +148,7 @@ fn foo() {
 ",
             r"
 ///
-/// <|> Some docs
+/// $0 Some docs
 fn foo() {
 }
 ",
@@ -175,7 +172,7 @@ fn main() {
             r"
 fn main() {
     // Fix
-    // <|> me
+    // $0 me
     let x = 1 + 1;
 }
 ",
@@ -195,7 +192,7 @@ fn main() {
             r"
 fn main() {
     // Fix
-    // <|>
+    // $0
     // me
     let x = 1 + 1;
 }
diff --git a/crates/rust-analyzer/src/lsp_ext.rs b/crates/rust-analyzer/src/lsp_ext.rs
index f75a26eb7..3c7bd609d 100644
--- a/crates/rust-analyzer/src/lsp_ext.rs
+++ b/crates/rust-analyzer/src/lsp_ext.rs
@@ -102,7 +102,7 @@ pub enum OnEnter {}
 
 impl Request for OnEnter {
     type Params = lsp_types::TextDocumentPositionParams;
-    type Result = Option<SourceChange>;
+    type Result = Option<SnippetWorkspaceEdit>;
     const METHOD: &'static str = "rust-analyzer/onEnter";
 }
 
diff --git a/crates/rust-analyzer/src/main_loop/handlers.rs b/crates/rust-analyzer/src/main_loop/handlers.rs
index be6a0aece..fcf08cd79 100644
--- a/crates/rust-analyzer/src/main_loop/handlers.rs
+++ b/crates/rust-analyzer/src/main_loop/handlers.rs
@@ -159,12 +159,12 @@ pub fn handle_join_lines(
 pub fn handle_on_enter(
     world: WorldSnapshot,
     params: lsp_types::TextDocumentPositionParams,
-) -> Result<Option<lsp_ext::SourceChange>> {
+) -> Result<Option<lsp_ext::SnippetWorkspaceEdit>> {
     let _p = profile("handle_on_enter");
     let position = from_proto::file_position(&world, params)?;
     match world.analysis().on_enter(position)? {
         None => Ok(None),
-        Some(source_change) => to_proto::source_change(&world, source_change).map(Some),
+        Some(source_change) => to_proto::snippet_workspace_edit(&world, source_change).map(Some),
     }
 }
 
diff --git a/crates/rust-analyzer/tests/heavy_tests/main.rs b/crates/rust-analyzer/tests/heavy_tests/main.rs
index 74676b3ee..4e94c37e1 100644
--- a/crates/rust-analyzer/tests/heavy_tests/main.rs
+++ b/crates/rust-analyzer/tests/heavy_tests/main.rs
@@ -474,27 +474,21 @@ fn main() {{}}
             position: Position { line: 0, character: 5 },
         },
         json!({
-          "cursorPosition": {
-            "position": { "character": 4, "line": 1 },
-            "textDocument": { "uri": "file:///[..]src/m0.rs" }
-          },
-          "label": "On enter",
-          "workspaceEdit": {
-            "documentChanges": [
-              {
-                "edits": [
-                  {
-                    "newText": "\n/// ",
-                    "range": {
-                      "end": { "character": 5, "line": 0 },
-                      "start": { "character": 5, "line": 0 }
-                    }
+          "documentChanges": [
+            {
+              "edits": [
+                {
+                  "insertTextFormat": 2,
+                  "newText": "\n/// $0",
+                  "range": {
+                    "end": { "character": 5, "line": 0 },
+                    "start": { "character": 5, "line": 0 }
                   }
-                ],
-                "textDocument": { "uri": "file:///[..]src/m0.rs", "version": null }
-              }
-            ]
-          }
+                }
+              ],
+              "textDocument": { "uri": "file:///[..]src/m0.rs", "version": null }
+            }
+          ]
         }),
     );
     let elapsed = start.elapsed();
@@ -526,27 +520,21 @@ version = \"0.0.0\"
             position: Position { line: 0, character: 8 },
         },
         json!({
-          "cursorPosition": {
-            "position": { "line": 1, "character": 4 },
-            "textDocument": { "uri": "file:///[..]src/main.rs" }
-          },
-          "label": "On enter",
-          "workspaceEdit": {
-            "documentChanges": [
-              {
-                "edits": [
-                  {
-                    "newText": "\r\n/// ",
-                    "range": {
-                      "end": { "line": 0, "character": 8 },
-                      "start": { "line": 0, "character": 8 }
-                    }
+          "documentChanges": [
+            {
+              "edits": [
+                {
+                  "insertTextFormat": 2,
+                  "newText": "\r\n/// $0",
+                  "range": {
+                    "end": { "line": 0, "character": 8 },
+                    "start": { "line": 0, "character": 8 }
                   }
-                ],
-                "textDocument": { "uri": "file:///[..]src/main.rs", "version": null }
-              }
-            ]
-          }
+                }
+              ],
+              "textDocument": { "uri": "file:///[..]src/main.rs", "version": null }
+            }
+          ]
         }),
     );
 }