From e28c2cc3c6e4d9e4c34327947595622f99878956 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Tue, 15 Dec 2020 08:27:59 -0500
Subject: [PATCH] Auto-complete of origin pattern for `||`-based patterns

Related commit:
- https://github.com/gorhill/uBlock/commit/daf464b3c30e9c0c5f5991ba1bde8f9dca1d7078
---
 src/js/codemirror/ubo-static-filtering.js | 25 +++++++++++++----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/src/js/codemirror/ubo-static-filtering.js b/src/js/codemirror/ubo-static-filtering.js
index 1b987b22b..b7d329521 100644
--- a/src/js/codemirror/ubo-static-filtering.js
+++ b/src/js/codemirror/ubo-static-filtering.js
@@ -455,18 +455,28 @@ const initHints = function() {
         };
     };
 
-    const getOriginHints = function(cursor, line) {
+    const getOriginHints = function(cursor, line, suffix = '') {
         const beg = cursor.ch;
         const matchLeft = /[^,|=~]*$/.exec(line.slice(0, beg));
         const matchRight = /^[^#,|]*/.exec(line.slice(beg));
         if ( matchLeft === null || matchRight === null ) { return; }
         const hints = [];
         for ( const text of originHints ) {
-            hints.push(text);
+            hints.push(text + suffix);
         }
         return pickBestHints(cursor, matchLeft[0], matchRight[0], hints);
     };
 
+    const getNetPatternHints = function(cursor, line) {
+        if ( /\|\|[\w.-]*$/.test(line.slice(0, cursor.ch)) ) {
+            return getOriginHints(cursor, line, '^');
+        }
+        // Maybe a static extended filter is meant to be crafted.
+        if ( /[^\w\x80-\xF4#,.-]/.test(line) === false ) {
+            return getOriginHints(cursor, line);
+        }
+    };
+
     const getNetOptionHints = function(cursor, seedLeft, seedRight) {
         const isNegated = seedLeft.startsWith('~');
         if ( isNegated ) {
@@ -503,16 +513,9 @@ const initHints = function() {
 
     const getNetHints = function(cursor, line) {
         const beg = cursor.ch;
-        if (
-            parser.optionsAnchorSpan.len === 0 &&
-            line.endsWith('$') === false
-        ) {
-            if ( /[^\w\x80-\xF4#,.-]/.test(line) === false ) {
-                return getOriginHints(cursor, line);
-            }
-            return;
+        if ( beg <= parser.slices[parser.optionsAnchorSpan.i+1] ) {
+            return getNetPatternHints(cursor, line);
         }
-        if ( beg < parser.slices[parser.optionsSpan.i+1] ) { return; }
         const lineBefore = line.slice(0, beg);
         const lineAfter = line.slice(beg);
         let matchLeft = /[^$,]*$/.exec(lineBefore);