From a7ba55f2b781544cd74927137025f2c00a398f69 Mon Sep 17 00:00:00 2001
From: Kristóf Marussy <kristof@marussy.com>
Date: Sun, 31 Oct 2021 01:53:11 +0200
Subject: fix(web): fix server-side content assist filtering

---
 language-web/src/main/js/xtext/ContentAssistService.ts | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

(limited to 'language-web/src')

diff --git a/language-web/src/main/js/xtext/ContentAssistService.ts b/language-web/src/main/js/xtext/ContentAssistService.ts
index ec6b80d2..8461ec7f 100644
--- a/language-web/src/main/js/xtext/ContentAssistService.ts
+++ b/language-web/src/main/js/xtext/ContentAssistService.ts
@@ -14,20 +14,28 @@ const PROPOSALS_LIMIT = 1000;
 
 const IDENTIFIER_REGEXP_STR = '[a-zA-Z0-9_]*';
 
+const HIGH_PRIORITY_KEYWORDS = ['<->'];
+
+const QUALIFIED_NAME_SEPARATOR_REGEXP = /::/g;
+
 const log = getLogger('xtext.ContentAssistService');
 
 function createCompletion(entry: IContentAssistEntry): Completion {
   let boost;
   switch (entry.kind) {
     case 'KEYWORD':
-      boost = -99;
+      // Some hard-to-type operators should be on top.
+      boost = HIGH_PRIORITY_KEYWORDS.includes(entry.proposal) ? 10 : -99;
       break;
     case 'TEXT':
     case 'SNIPPET':
       boost = -90;
       break;
-    default:
-      boost = 0;
+    default: {
+      // Penalize qualified names (vs available unqualified names).
+      const extraSegments = entry.proposal.match(QUALIFIED_NAME_SEPARATOR_REGEXP)?.length || 0;
+      boost = Math.max(-5 * extraSegments, -50);
+    }
       break;
   }
   return {
-- 
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