3 files changed, 42 insertions, 39 deletions

diff --git a/crates/ra_lsp_server/src/caps.rs b/crates/ra_lsp_server/src/caps.rs
index a74f9f27b..2599a4ca6 100644
--- a/crates/ra_lsp_server/src/caps.rs
+++ b/crates/ra_lsp_server/src/caps.rs
@@ -37,7 +37,7 @@ pub fn server_capabilities() -> ServerCapabilities {
         document_range_formatting_provider: None,
         document_on_type_formatting_provider: Some(DocumentOnTypeFormattingOptions {
             first_trigger_character: "=".to_string(),
-            more_trigger_character: None,
+            more_trigger_character: Some(vec![".".to_string()]),
         }),
         folding_range_provider: Some(FoldingRangeProviderCapability::Simple(true)),
         rename_provider: Some(RenameProviderCapability::Options(RenameOptions {
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 60d9671de..2dc1be26a 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -1,13 +1,11 @@
 mod handlers;
 mod subscriptions;
 
-use std::{
-    fmt,
-    path::PathBuf,
-    sync::Arc,
-};
+use std::{fmt, path::PathBuf, sync::Arc};
 
-use crossbeam_channel::{unbounded, select, Receiver, Sender, RecvError};
+use crossbeam_channel::{select, unbounded, Receiver, RecvError, Sender};
+use failure::{bail, format_err};
+use failure_derive::Fail;
 use gen_lsp_server::{
     handle_shutdown, ErrorCode, RawMessage, RawNotification, RawRequest, RawResponse,
 };
@@ -15,11 +13,9 @@ use languageserver_types::NumberOrString;
 use ra_analysis::{Canceled, FileId, LibraryData};
 use ra_vfs::VfsTask;
 use rayon;
-use threadpool::ThreadPool;
 use rustc_hash::FxHashSet;
 use serde::{de::DeserializeOwned, Serialize};
-use failure::{format_err, bail};
-use failure_derive::Fail;
+use threadpool::ThreadPool;
 
 use crate::{
     main_loop::subscriptions::Subscriptions,
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(