Restore utf8 support from davidshimjs/qrcodejs#6.

leMaik · Jun 19, 2022 · d36f0bc · d36f0bc
1 parent f2e6a18
commit d36f0bc
Showing 1 changed file with 36 additions and 5 deletions.
diff --git a/lib/qrcode.js b/lib/qrcode.js
@@ -35,17 +35,48 @@
 function QR8bitByte(data) {
   this.mode = QRMode.MODE_8BIT_BYTE;
   this.data = data;
+  this.parsedData = [];
+
+  // Added to support UTF-8 Characters
+  for (var i = 0, l = this.data.length; i < l; i++) {
+    var byteArray = [];
+    var code = this.data.charCodeAt(i);
+
+    if (code > 0x10000) {
+      byteArray[0] = 0xf0 | ((code & 0x1c0000) >>> 18);
+      byteArray[1] = 0x80 | ((code & 0x3f000) >>> 12);
+      byteArray[2] = 0x80 | ((code & 0xfc0) >>> 6);
+      byteArray[3] = 0x80 | (code & 0x3f);
+    } else if (code > 0x800) {
+      byteArray[0] = 0xe0 | ((code & 0xf000) >>> 12);
+      byteArray[1] = 0x80 | ((code & 0xfc0) >>> 6);
+      byteArray[2] = 0x80 | (code & 0x3f);
+    } else if (code > 0x80) {
+      byteArray[0] = 0xc0 | ((code & 0x7c0) >>> 6);
+      byteArray[1] = 0x80 | (code & 0x3f);
+    } else {
+      byteArray[0] = code;
+    }
+
+    this.parsedData.push(byteArray);
+  }
+
+  this.parsedData = Array.prototype.concat.apply([], this.parsedData);
+
+  if (this.parsedData.length != this.data.length) {
+    this.parsedData.unshift(191);
+    this.parsedData.unshift(187);
+    this.parsedData.unshift(239);
+  }
 }
 
 QR8bitByte.prototype = {
   getLength: function (buffer) {
-    return this.data.length;
+    return this.parsedData.length;
   },
-
   write: function (buffer) {
-    for (var i = 0; i < this.data.length; i++) {
-      // not JIS ...
-      buffer.put(this.data.charCodeAt(i), 8);
+    for (var i = 0, l = this.parsedData.length; i < l; i++) {
+      buffer.put(this.parsedData[i], 8);
     }
   },
 };