fix: preserve newlines correctly in delete-and-redraft (#845)

fixes #830

src/routes/_actions/deleteAndRedraft.js

@@ -0,0 +1,24 @@
+import { statusHtmlToPlainText } from '../_utils/statusHtmlToPlainText'
+import { importShowComposeDialog } from '../_components/dialog/asyncDialogs'
+import { doDeleteStatus } from './delete'
+import { store } from '../_store/store'
+
+export async function deleteAndRedraft (status) {
+  let deleteStatusPromise = doDeleteStatus(status.id)
+  let dialogPromise = importShowComposeDialog()
+  await deleteStatusPromise
+
+  store.setComposeData('dialog', {
+    text: statusHtmlToPlainText(status.content, status.mentions),
+    contentWarningShown: !!status.spoiler_text,
+    contentWarning: status.spoiler_text || '',
+    postPrivacy: status.visibility,
+    media: status.media_attachments && status.media_attachments.map(_ => ({
+      description: _.description || '',
+      data: _
+    })),
+    inReplyToId: status.in_reply_to_id
+  })
+  let showComposeDialog = await dialogPromise
+  showComposeDialog()
+}

src/routes/_components/dialog/components/StatusOptionsDialog.html

@@ -20,8 +20,7 @@ import { setAccountMuted } from '../../../_actions/mute'
 import { setStatusPinnedOrUnpinned } from '../../../_actions/pin'
 import { setConversationMuted } from '../../../_actions/muteConversation'
 import { copyText } from '../../../_actions/copyText'
-import { statusHtmlToPlainText } from '../../../_utils/statusHtmlToPlainText'
-import { importShowComposeDialog } from '../asyncDialogs'
+import { deleteAndRedraft } from '../../../_actions/deleteAndRedraft'
 
 export default {
   oncreate,
@@ -189,24 +188,8 @@ export default {
     },
     async onRedraft () {
       let { status } = this.get()
-      let deleteStatusPromise = doDeleteStatus(status.id)
-      let dialogPromise = importShowComposeDialog()
-      await deleteStatusPromise
-
-      this.store.setComposeData('dialog', {
-        text: statusHtmlToPlainText(status.content, status.mentions),
-        contentWarningShown: !!status.spoiler_text,
-        contentWarning: status.spoiler_text || '',
-        postPrivacy: status.visibility,
-        media: status.media_attachments && status.media_attachments.map(_ => ({
-          description: _.description || '',
-          data: _
-        })),
-        inReplyToId: status.in_reply_to_id
-      })
+      await deleteAndRedraft(status)
       this.close()
-      let showComposeDialog = await dialogPromise
-      showComposeDialog()
     }
   }
 }

src/routes/_utils/statusHtmlToPlainText.js

@@ -2,13 +2,8 @@ import { mark, stop } from './marks'
 
 let domParser = process.browser && new DOMParser()
 
-export function statusHtmlToPlainText (html, mentions) {
-  if (!html) {
-    return ''
-  }
-  mark('statusHtmlToPlainText')
-  let doc = domParser.parseFromString(html, 'text/html')
 // mentions like "@foo" have to be expanded to "@foo@example.com"
+function massageMentions (doc, mentions) {
   let anchors = doc.querySelectorAll('a.mention')
   for (let i = 0; i < anchors.length; i++) {
     let anchor = anchors[i]
@@ -18,7 +13,29 @@ export function statusHtmlToPlainText (html, mentions) {
       anchor.innerText = `@${mention.acct}`
     }
   }
-  let res = doc.documentElement.textContent
+}
+
+// paragraphs should be separated by double newlines
+// single <br/>s should become single newlines
+function innerTextRetainingNewlines (doc) {
+  let paragraphs = doc.querySelectorAll('p')
+  return Array.from(paragraphs).map(paragraph => {
+    let brs = paragraph.querySelectorAll('br')
+    Array.from(brs).forEach(br => {
+      br.parentNode.replaceChild(doc.createTextNode('\n'), br)
+    })
+    return paragraph.textContent
+  }).join('\n\n')
+}
+
+export function statusHtmlToPlainText (html, mentions) {
+  if (!html) {
+    return ''
+  }
+  mark('statusHtmlToPlainText')
+  let doc = domParser.parseFromString(html, 'text/html')
+  massageMentions(doc, mentions)
+  let res = innerTextRetainingNewlines(doc)
   stop('statusHtmlToPlainText')
   return res
 }

tests/spec/121-delete-and-redraft.js

@@ -145,3 +145,20 @@ test('delete and redraft reply within thread', async t => {
     })
     .expect(getNthStatus(2).exists).notOk()
 })
+
+test('multiple paragraphs', async t => {
+  let text = 'hey ho\n\ndouble newline!\njust one newline\njust another newline\n\nanother double newline!'
+  await postAs('foobar', text)
+  await loginAsFoobar(t)
+  await t
+    .hover(getNthStatus(0))
+    .expect(getNthStatusContent(0).innerText).contains(text)
+    .click(getNthStatusOptionsButton(0))
+    .click(dialogOptionsOption.withText('Delete and redraft'))
+    .expect(modalDialog.hasAttribute('aria-hidden')).notOk()
+    .expect(composeModalInput.value).eql(text)
+    .typeText(composeModalInput, '\n\nwoot', { paste: true })
+    .click(composeModalComposeButton)
+    .expect(modalDialog.exists).notOk()
+    .expect(getNthStatusContent(0).innerText).contains(text + '\n\nwoot')
+})