Merge #442

442: WIP: indent on typing dot r=matklad a=simonvandel

Fixes #439.

The unit test passes, but I can't seem to make VS code perform the action. The existing action on "=" doesn't work either on my end either though.

I didn't add any smart way of detecting the current indent level. Any ideas how I would do that?

Co-authored-by: Simon Vandel Sillesen <[email protected]>

1 files changed, 36 insertions, 29 deletions

diff --git a/crates/ra_lsp_server/src/main_loop/handlers.rs b/crates/ra_lsp_server/src/main_loop/handlers.rs
index 1baed73ad..51f134e8a 100644
--- a/crates/ra_lsp_server/src/main_loop/handlers.rs
+++ b/crates/ra_lsp_server/src/main_loop/handlers.rs
@@ -2,15 +2,16 @@ use std::collections::HashMap;
 
 use gen_lsp_server::ErrorCode;
 use languageserver_types::{
-    CodeActionResponse, Command, Diagnostic,
-    DiagnosticSeverity, DocumentSymbol, Documentation, FoldingRange, FoldingRangeKind,
-    FoldingRangeParams, Location, MarkupContent, MarkupKind, MarkedString, Position,
-    PrepareRenameResponse, RenameParams, SymbolInformation, TextDocumentIdentifier, TextEdit,
-    Range, WorkspaceEdit, ParameterInformation, ParameterLabel, SignatureInformation, Hover,
-    HoverContents, DocumentFormattingParams, DocumentHighlight,
+    CodeActionResponse, Command, Diagnostic, DiagnosticSeverity, DocumentFormattingParams,
+    DocumentHighlight, DocumentSymbol, Documentation, FoldingRange, FoldingRangeKind,
+    FoldingRangeParams, Hover, HoverContents, Location, MarkedString, MarkupContent, MarkupKind,
+    ParameterInformation, ParameterLabel, Position, PrepareRenameResponse, Range, RenameParams,
+    SignatureInformation, SymbolInformation, TextDocumentIdentifier, TextEdit, WorkspaceEdit,
 };
-use ra_analysis::{FileId, FoldKind, Query, RunnableKind, FileRange, FilePosition, Severity};
-use ra_syntax::{TextUnit, text_utils::intersect};
+use ra_analysis::{
+    FileId, FilePosition, FileRange, FoldKind, Query, RunnableKind, Severity, SourceChange,
+};
+use ra_syntax::{text_utils::intersect, TextUnit};
 use ra_text_edit::text_utils::contains_offset_nonstrict;
 use rustc_hash::FxHashMap;
 use serde_json::to_value;
@@ -92,29 +93,35 @@ pub fn handle_on_type_formatting(
     world: ServerWorld,
     params: req::DocumentOnTypeFormattingParams,
 ) -> Result<Option<Vec<TextEdit>>> {
-    if params.ch != "=" {
-        return Ok(None);
+    let analysis: Option<Box<Fn(FilePosition) -> Option<SourceChange>>> = match params.ch.as_str() {
+        "=" => Some(Box::new(|pos| world.analysis().on_eq_typed(pos))),
+        "." => Some(Box::new(|pos| world.analysis().on_dot_typed(pos))),
+        _ => None,
+    };
+
+    if let Some(ana) = analysis {
+        let file_id = params.text_document.try_conv_with(&world)?;
+        let line_index = world.analysis().file_line_index(file_id);
+        let position = FilePosition {
+            file_id,
+            offset: params.position.conv_with(&line_index),
+        };
+
+        if let Some(mut action) = ana(position) {
+            let change: Vec<TextEdit> = action
+                .source_file_edits
+                .pop()
+                .unwrap()
+                .edit
+                .as_atoms()
+                .iter()
+                .map_conv_with(&line_index)
+                .collect();
+            return Ok(Some(change));
+        }
     }
 
-    let file_id = params.text_document.try_conv_with(&world)?;
-    let line_index = world.analysis().file_line_index(file_id);
-    let position = FilePosition {
-        file_id,
-        offset: params.position.conv_with(&line_index),
-    };
-    let edits = match world.analysis().on_eq_typed(position) {
-        None => return Ok(None),
-        Some(mut action) => action
-            .source_file_edits
-            .pop()
-            .unwrap()
-            .edit
-            .as_atoms()
-            .iter()
-            .map_conv_with(&line_index)
-            .collect(),
-    };
-    Ok(Some(edits))
+    return Ok(None);
 }
 
 pub fn handle_document_symbol(