From 0ca63f94b495034a1ca9a2aa5b69d3273cc90afd Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Tue, 27 Apr 2021 12:27:36 +0200
Subject: [PATCH] Convert `src/core/ccitt_stream.js` to use standard classes

---
 src/core/ccitt_stream.js | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/src/core/ccitt_stream.js b/src/core/ccitt_stream.js
index ced509334..6f597689a 100644
--- a/src/core/ccitt_stream.js
+++ b/src/core/ccitt_stream.js
@@ -17,9 +17,10 @@ import { Dict, isDict } from "./primitives.js";
 import { CCITTFaxDecoder } from "./ccitt.js";
 import { DecodeStream } from "./stream.js";
 
-const CCITTFaxStream = (function CCITTFaxStreamClosure() {
-  // eslint-disable-next-line no-shadow
-  function CCITTFaxStream(str, maybeLength, params) {
+class CCITTFaxStream extends DecodeStream {
+  constructor(str, maybeLength, params) {
+    super(maybeLength);
+
     this.str = str;
     this.dict = str.dict;
 
@@ -41,13 +42,9 @@ const CCITTFaxStream = (function CCITTFaxStreamClosure() {
       EndOfBlock: params.get("EndOfBlock"),
       BlackIs1: params.get("BlackIs1"),
     });
-
-    DecodeStream.call(this, maybeLength);
   }
 
-  CCITTFaxStream.prototype = Object.create(DecodeStream.prototype);
-
-  CCITTFaxStream.prototype.readBlock = function () {
+  readBlock() {
     while (!this.eof) {
       const c = this.ccittFaxDecoder.readNextChar();
       if (c === -1) {
@@ -57,9 +54,7 @@ const CCITTFaxStream = (function CCITTFaxStreamClosure() {
       this.ensureBuffer(this.bufferLength + 1);
       this.buffer[this.bufferLength++] = c;
     }
-  };
-
-  return CCITTFaxStream;
-})();
+  }
+}
 
 export { CCITTFaxStream };