[elpa] main 7247f047a3 2/2: Improve robustness of table filter

[Philip Kaludercic]

branch: main
commit 7247f047a34e263cb198014c1438d5fca7049168
Author: Philip Kaludercic <philipk@posteo.net>
Commit: Philip Kaludercic <philipk@posteo.net>

    Improve robustness of table filter
    
    To avoid raising an exception while parsing a regular expression, we
    process the input escaping meta-characters and creating a custom
    regular expression that matches words in the query occurring in any
    order.  (Bug#69132)
---
 html/javascript/package-search.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/html/javascript/package-search.js 
b/html/javascript/package-search.js
index af5d48230a..78df7f2f24 100644
--- a/html/javascript/package-search.js
+++ b/html/javascript/package-search.js
@@ -14,6 +14,12 @@
 
 "use strict";
 
+function parse_pattern(pattern) { // ala `apropos-parse-pattern'
+       const words = pattern.split(/\s+/);
+       const parts = words.map(s => `(${s.replace(/([^a-zA-Z0-9])/g, 
"\\$1")})`);
+       return new RegExp(`((${parts.join("|")}).*)+`, "i");
+}
+
 window.addEventListener("load", function (event) {
        const table = document.getElementById("packages");
 
@@ -26,7 +32,7 @@ window.addEventListener("load", function (event) {
                if (tid) clearTimeout(tid);
 
                tid = setTimeout(function (query) {
-                       const pattern = new RegExp(query);
+                       const pattern = parse_pattern(query);
                        for (let i = 1; i < table.rows.length; i++) {
                                const row = table.rows.item(i);