optimize what gets passed to emojione.unicodeToImage

10 years ago · dfffbeec46
parent 2a5b80da1d
commit dfffbeec46
1 changed files with 8 additions and 1 deletions
--- a/js/filters.js
+++ b/js/filters.js
@ -161,7 +161,14 @@ weechat.filter('getBufferQuickKeys', function () {
 weechat.filter('emojify', function() {
    return function(text, enable_JS_Emoji) {
        if (enable_JS_Emoji === true && window.emojione !== undefined) {
-            return emojione.unicodeToImage(text);
+            // Emoji live in the D800-DFFF surrogate plane; only bother passing
+            // this range to CPU-expensive unicodeToImage();
+            var emojiRegex = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
+            if (emojiRegex.test(text)) {
+                return emojione.unicodeToImage(text);
+            } else {
+                return(text);
+            }
        } else {
            return(text);
        }