readline: remove deprecated methods

This commit removes the deprecated exports getStringWidth(),
stripVTControlCharacters(), and isFullWidthCodePoint(). It also
removes codePointAt() in its entirety, as it was deprecated and
not being used by core.

Refs: #3862
PR-URL: #6423
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

lib/readline.js

@@ -10,7 +10,6 @@ const kHistorySize = 30;
 
 const util = require('util');
 const debug = util.debuglog('readline');
-const internalUtil = require('internal/util');
 const inherits = util.inherits;
 const Buffer = require('buffer').Buffer;
 const EventEmitter = require('events');
@@ -1042,38 +1041,3 @@ function clearScreenDown(stream) {
   stream.write('\x1b[0J');
 }
 exports.clearScreenDown = clearScreenDown;
-
-
-/**
- * Returns the Unicode code point for the character at the
- * given index in the given string. Similar to String.charCodeAt(),
- * but this function handles surrogates (code point >= 0x10000).
- */
-
-function codePointAt(str, index) {
-  var code = str.charCodeAt(index);
-  var low;
-  if (0xd800 <= code && code <= 0xdbff) { // High surrogate
-    low = str.charCodeAt(index + 1);
-    if (!isNaN(low)) {
-      code = 0x10000 + (code - 0xd800) * 0x400 + (low - 0xdc00);
-    }
-  }
-  return code;
-}
-exports.codePointAt = internalUtil.deprecate(codePointAt,
-    'readline.codePointAt is deprecated. ' +
-    'Use String.prototype.codePointAt instead.');
-
-
-exports.getStringWidth = internalUtil.deprecate(getStringWidth,
-    'getStringWidth is deprecated and will be removed.');
-
-
-exports.isFullWidthCodePoint = internalUtil.deprecate(isFullWidthCodePoint,
-    'isFullWidthCodePoint is deprecated and will be removed.');
-
-
-exports.stripVTControlCharacters = internalUtil.deprecate(
-    stripVTControlCharacters,
-    'stripVTControlCharacters is deprecated and will be removed.');

test/parallel/test-readline-interface.js

@@ -1,9 +1,11 @@
+// Flags: --expose_internals
 'use strict';
 require('../common');
-var assert = require('assert');
-var readline = require('readline');
-var EventEmitter = require('events').EventEmitter;
-var inherits = require('util').inherits;
+const assert = require('assert');
+const readline = require('readline');
+const internalReadline = require('internal/readline');
+const EventEmitter = require('events').EventEmitter;
+const inherits = require('util').inherits;
 
 function FakeInput() {
   EventEmitter.call(this);
@@ -322,37 +324,31 @@ function isWarned(emitter) {
   }
 
   // wide characters should be treated as two columns.
-  assert.equal(readline.isFullWidthCodePoint('a'.charCodeAt(0)), false);
-  assert.equal(readline.isFullWidthCodePoint('あ'.charCodeAt(0)), true);
-  assert.equal(readline.isFullWidthCodePoint('谢'.charCodeAt(0)), true);
-  assert.equal(readline.isFullWidthCodePoint('고'.charCodeAt(0)), true);
-  assert.equal(readline.isFullWidthCodePoint(0x1f251), true); // surrogate
-  assert.equal(readline.codePointAt('ABC', 0), 0x41);
-  assert.equal(readline.codePointAt('あいう', 1), 0x3044);
-  assert.equal(readline.codePointAt('\ud800\udc00', 0),  // surrogate
-      0x10000);
-  assert.equal(readline.codePointAt('\ud800\udc00A', 2), // surrogate
-      0x41);
-  assert.equal(readline.getStringWidth('abcde'), 5);
-  assert.equal(readline.getStringWidth('古池や'), 6);
-  assert.equal(readline.getStringWidth('ノード.js'), 9);
-  assert.equal(readline.getStringWidth('你好'), 4);
-  assert.equal(readline.getStringWidth('안녕하세요'), 10);
-  assert.equal(readline.getStringWidth('A\ud83c\ude00BC'), 5); // surrogate
+  assert.equal(internalReadline.isFullWidthCodePoint('a'.charCodeAt(0)), false);
+  assert.equal(internalReadline.isFullWidthCodePoint('あ'.charCodeAt(0)), true);
+  assert.equal(internalReadline.isFullWidthCodePoint('谢'.charCodeAt(0)), true);
+  assert.equal(internalReadline.isFullWidthCodePoint('고'.charCodeAt(0)), true);
+  assert.equal(internalReadline.isFullWidthCodePoint(0x1f251), true);
+  assert.equal(internalReadline.getStringWidth('abcde'), 5);
+  assert.equal(internalReadline.getStringWidth('古池や'), 6);
+  assert.equal(internalReadline.getStringWidth('ノード.js'), 9);
+  assert.equal(internalReadline.getStringWidth('你好'), 4);
+  assert.equal(internalReadline.getStringWidth('안녕하세요'), 10);
+  assert.equal(internalReadline.getStringWidth('A\ud83c\ude00BC'), 5);
 
   // check if vt control chars are stripped
-  assert.equal(readline
+  assert.equal(internalReadline
                .stripVTControlCharacters('\u001b[31m> \u001b[39m'), '> ');
-  assert.equal(readline
+  assert.equal(internalReadline
                .stripVTControlCharacters('\u001b[31m> \u001b[39m> '), '> > ');
-  assert.equal(readline
+  assert.equal(internalReadline
                .stripVTControlCharacters('\u001b[31m\u001b[39m'), '');
-  assert.equal(readline
+  assert.equal(internalReadline
                .stripVTControlCharacters('> '), '> ');
-  assert.equal(readline.getStringWidth('\u001b[31m> \u001b[39m'), 2);
-  assert.equal(readline.getStringWidth('\u001b[31m> \u001b[39m> '), 4);
-  assert.equal(readline.getStringWidth('\u001b[31m\u001b[39m'), 0);
-  assert.equal(readline.getStringWidth('> '), 2);
+  assert.equal(internalReadline.getStringWidth('\u001b[31m> \u001b[39m'), 2);
+  assert.equal(internalReadline.getStringWidth('\u001b[31m> \u001b[39m> '), 4);
+  assert.equal(internalReadline.getStringWidth('\u001b[31m\u001b[39m'), 0);
+  assert.equal(internalReadline.getStringWidth('> '), 2);
 
   assert.deepStrictEqual(fi.listeners(terminal ? 'keypress' : 'data'), []);