Optimize IcalEvent.fold() for all-ASCII lines

hebcal · Nov 3, 2021 · cb99c01 · cb99c01
1 parent 63d5734
commit cb99c01
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hebcal/icalendar",
-  "version": "4.14.2",
+  "version": "4.14.3",
   "author": "Michael J. Radwin (https://github.com/mjradwin)",
   "keywords": [
     "ical",

diff --git a/src/icalendar.js b/src/icalendar.js
@@ -53,6 +53,7 @@ function appendTrackingToUrl(url, options) {
 }
 
 const encoder = new TextEncoder();
+const char74re = /(.{1,74})/g;
 
 /**
  * Represents an RFC 2445 iCalendar VEVENT
@@ -230,6 +231,16 @@ export class IcalEvent {
    * @return {string}
    */
   static fold(line) {
+    let isASCII = true;
+    for (let i = 0; i < line.length; i++) {
+      if (line.charCodeAt(i) > 255) {
+        isASCII = false;
+        break;
+      }
+    }
+    if (isASCII) {
+      return line.length <= 74 ? line : line.match(char74re).join('\r\n ');
+    }
     if (encoder.encode(line).length <= 74) {
       return line;
     }