From 79eab8ccde4074ab0adaa8daee09416f4f8671b6 Mon Sep 17 00:00:00 2001
From: Pavel Mineev <pavel@mineev.me>
Date: Wed, 26 May 2021 15:08:39 +0300
Subject: [PATCH] fix copy message with styles

---
 frontend/app/common/copy.ts                 | 53 +++++++++++----------
 frontend/app/components/comment/comment.tsx | 30 +++++-------
 2 files changed, 41 insertions(+), 42 deletions(-)

diff --git a/frontend/app/common/copy.ts b/frontend/app/common/copy.ts
index 188a603e..8c9462b4 100644
--- a/frontend/app/common/copy.ts
+++ b/frontend/app/common/copy.ts
@@ -1,43 +1,46 @@
-// based on https://github.com/sindresorhus/copy-text-to-clipboard, but improved to copy text styles too
-export function copy(input: string): boolean {
-  const element = document.createElement('textarea') as HTMLTextAreaElement;
+export function copy(content: string): boolean {
+  // We use `div` instead of `input` or `textarea` because we want to copy styles
+  const container = document.createElement('div');
   const previouslyFocusedElement = document.activeElement as HTMLElement;
 
-  element.value = input;
+  container.innerHTML = content;
 
-  // Prevent keyboard from showing on mobile
-  element.setAttribute('readonly', '');
-
-  Object.assign(element.style, {
+  Object.assign(container.style, {
     contain: 'strict',
     position: 'absolute',
     left: '-9999px',
     fontSize: '12pt', // Prevent zooming on iOS
   });
 
-  const selection = document.getSelection();
-  let originalRange: boolean | Range = false;
+  document.body.appendChild(container);
 
-  if (selection && selection.rangeCount > 0) {
-    originalRange = selection.getRangeAt(0);
+  let selection = window.getSelection();
+  // save original selection
+  const originalRange = selection && selection.rangeCount > 0 ? selection.getRangeAt(0) : null;
+  const range = document.createRange();
+
+  range.selectNodeContents(container);
+
+  if (selection) {
+    selection.removeAllRanges();
+    selection.addRange(range);
   }
 
-  document.body.append(element);
-  element.select();
+  document.execCommand('copy');
 
-  // Explicit selection workaround for iOS
-  element.selectionStart = 0;
-  element.selectionEnd = input.length;
-
-  let isSuccess = false;
+  let success = false;
   try {
-    isSuccess = document.execCommand('copy');
-  } catch (_) {}
+    success = document.execCommand('copy');
+  } catch (err) {}
 
-  element.remove();
-
-  if (selection && originalRange) {
+  if (selection) {
     selection.removeAllRanges();
+  }
+
+  document.body.removeChild(container);
+
+  // Put the selection back in case had it before
+  if (originalRange && selection) {
     selection.addRange(originalRange);
   }
 
@@ -46,5 +49,5 @@ export function copy(input: string): boolean {
     previouslyFocusedElement.focus();
   }
 
-  return isSuccess;
+  return success;
 }
diff --git a/frontend/app/components/comment/comment.tsx b/frontend/app/components/comment/comment.tsx
index 3ed409fa..69ed9de9 100644
--- a/frontend/app/components/comment/comment.tsx
+++ b/frontend/app/components/comment/comment.tsx
@@ -17,7 +17,7 @@ import { Button } from 'components/button';
 import { Countdown } from 'components/countdown';
 import { getPreview, uploadImage } from 'common/api';
 import { postMessage } from 'utils/postMessage';
-import { FormattedMessage, useIntl, IntlShape, defineMessages } from 'react-intl';
+import { FormattedMessage, IntlShape, defineMessages } from 'react-intl';
 import { getVoteMessage, VoteMessagesTypes } from './getVoteMessage';
 import { getBlockingDurations } from './getBlockingDurations';
 import { boundActions } from './connected-comment';
@@ -85,6 +85,10 @@ const messages = defineMessages({
     id: 'comment.expired-time',
     defaultMessage: 'Editing time has expired.',
   },
+  commentTime: {
+    id: 'comment.time',
+    defaultMessage: '{day} at {time}',
+  },
 });
 
 export type CommentProps = {
@@ -372,8 +376,8 @@ export class Comment extends Component<CommentProps, State> {
 
   copyComment = () => {
     const username = this.props.data.user.name;
-    const time = this.props.data.time;
-    const text = this.textNode.current!.textContent || '';
+    const time = getLocalDatetime(this.props.intl, new Date(this.props.data.time));
+    const text = this.textNode.current?.textContent || '';
 
     copy(`<b>${username}</b>&nbsp;${time}<br>${text.replace(/\n+/g, '<br>')}`);
 
@@ -692,7 +696,7 @@ export class Comment extends Component<CommentProps, State> {
           )}
 
           <a href={`${o.locator.url}#${COMMENT_NODE_CLASSNAME_PREFIX}${o.id}`} className="comment__time">
-            <FormatTime time={o.time} />
+            {getLocalDatetime(this.props.intl, o.time)}
           </a>
 
           {!!props.level && props.level > 0 && props.view === 'main' && (
@@ -881,17 +885,9 @@ function getTextSnippet(html: string) {
   return snippet.length === LENGTH && result.length !== LENGTH ? `${snippet}...` : snippet;
 }
 
-function FormatTime({ time }: { time: Date }) {
-  const intl = useIntl();
-
-  return (
-    <FormattedMessage
-      id="comment.time"
-      defaultMessage="{day} at {time}"
-      values={{
-        day: intl.formatDate(time),
-        time: intl.formatTime(time),
-      }}
-    />
-  );
+function getLocalDatetime(intl: IntlShape, date: Date) {
+  return intl.formatMessage(messages.commentTime, {
+    day: intl.formatDate(date),
+    time: intl.formatTime(date),
+  });
 }