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ts/components/GroupTitleInput.tsx

@@ -1,13 +1,10 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-import React, { forwardRef, useRef, ClipboardEvent } from 'react';
+import React, { forwardRef } from 'react';
 
+import { Input } from './Input';
 import { LocalizerType } from '../types/Util';
-import { multiRef } from '../util/multiRef';
-import * as grapheme from '../util/grapheme';
-
-const MAX_GRAPHEME_COUNT = 32;
 
 type PropsType = {
   disabled?: boolean;
@@ -16,87 +13,18 @@ type PropsType = {
   value: string;
 };
 
-/**
- * Group titles must have fewer than MAX_GRAPHEME_COUNT glyphs. Ideally, we'd use the
- * `maxLength` property on inputs, but that doesn't account for glyphs that are more than
- * one UTF-16 code units. For example: `'💩💩'.length === 4`.
- *
- * This component effectively implements a "max grapheme length" on an input.
- *
- * At a high level, this component handles two methods of input:
- *
- * - `onChange`. *Before* the value is changed (in `onKeyDown`), we save the value and the
- *   cursor position. Then, in `onChange`, we see if the new value is too long. If it is,
- *   we revert the value and selection. Otherwise, we fire `onChangeValue`.
- *
- * - `onPaste`. If you're pasting something that will fit, we fall back to normal browser
- *   behavior, which calls `onChange`. If you're pasting something that won't fit, it's a
- *   noop.
- */
 export const GroupTitleInput = forwardRef<HTMLInputElement, PropsType>(
   ({ i18n, disabled = false, onChangeValue, value }, ref) => {
-    const innerRef = useRef<HTMLInputElement | null>(null);
-    const valueOnKeydownRef = useRef<string>(value);
-    const selectionStartOnKeydownRef = useRef<number>(value.length);
-
     return (
-      <div className="module-GroupInput--container">
-        <input
-          disabled={disabled}
-          className="module-GroupInput"
-          onKeyDown={() => {
-            const inputEl = innerRef.current;
-            if (!inputEl) {
-              return;
-            }
-
-            valueOnKeydownRef.current = inputEl.value;
-            selectionStartOnKeydownRef.current = inputEl.selectionStart || 0;
-          }}
-          onChange={() => {
-            const inputEl = innerRef.current;
-            if (!inputEl) {
-              return;
-            }
-
-            const newValue = inputEl.value;
-            if (grapheme.count(newValue) <= MAX_GRAPHEME_COUNT) {
-              onChangeValue(newValue);
-            } else {
-              inputEl.value = valueOnKeydownRef.current;
-              inputEl.selectionStart = selectionStartOnKeydownRef.current;
-              inputEl.selectionEnd = selectionStartOnKeydownRef.current;
-            }
-          }}
-          onPaste={(event: ClipboardEvent<HTMLInputElement>) => {
-            const inputEl = innerRef.current;
-            if (!inputEl) {
-              return;
-            }
-
-            const selectionStart = inputEl.selectionStart || 0;
-            const selectionEnd =
-              inputEl.selectionEnd || inputEl.selectionStart || 0;
-            const textBeforeSelection = value.slice(0, selectionStart);
-            const textAfterSelection = value.slice(selectionEnd);
-
-            const pastedText = event.clipboardData.getData('Text');
-
-            const newGraphemeCount =
-              grapheme.count(textBeforeSelection) +
-              grapheme.count(pastedText) +
-              grapheme.count(textAfterSelection);
-
-            if (newGraphemeCount > MAX_GRAPHEME_COUNT) {
-              event.preventDefault();
-            }
-          }}
-          placeholder={i18n('setGroupMetadata__group-name-placeholder')}
-          ref={multiRef<HTMLInputElement>(ref, innerRef)}
-          type="text"
-          value={value}
-        />
-      </div>
+      <Input
+        disabled={disabled}
+        i18n={i18n}
+        onChange={onChangeValue}
+        placeholder={i18n('setGroupMetadata__group-name-placeholder')}
+        maxGraphemeCount={32}
+        ref={ref}
+        value={value}
+      />
     );
   }
 );