SellectAll does not select all with blockquote and table

[dkrahn]

📝 Provide detailed reproduction steps (if any)

1. Open https://ckeditor.com/docs/ckeditor5/latest/examples/builds/document-editor.html
2. In the console run editor.setData('<blockquote><p>blockquote</p><figure class="table"><table><tbody><tr><td>Table</td></tr></tbody></table></figure></blockquote>')
3. Select all with Ctrl + A

✔️ Expected result

Expected to select all content in the editor.

❌ Actual result

Only selects first part os the text outside the table.

📃 Other details

If first and last elements of the editor are tables, it doesn't sellect all elements.

• Browser: Chrome
• OS: Windows
• CKEditor version: 22.0.0
• Installed CKEditor plugins: [Clipboard, Enter, SelectAllEditing, SelectAllUI, SelectAll, ShiftEnter, Input, Delete, Typing, UndoEditing, Undo, Essentials, AlignmentEditing, AlignmentUI, Alignment, FontSizeEditing, FontSize, FontFamilyEditing, FontFamily, FontColorEditing, FontColorUI, FontColor, FontBackgroundColorEditing, FontBackgroundColorUI, FontBackgroundColor, PendingActions, FileRepository, CKFinderUploadAdapter, Autoformat, BoldEditing, Bold, ItalicEditing, Italic, StrikethroughEditing, Strikethrough, UnderlineEditing, Underline, BlockQuoteEditing, BlockQuote, Notification, ImageEditing, TwoStepCaretMovement, LinkEditing, CKFinderEditing, CKFinderUI, CKFinder, CloudServices, WidgetTypeAround, Widget, ImageTextAlternativeEditing, ContextualBalloon, ImageTextAlternativeUI, ImageTextAlternative, Image, ImageUploadEditing, ImageUploadUI, ImageUpload, EasyImage, Paragraph, HeadingEditing, Heading, ImageCaptionEditing, ImageCaption, ImageStyleEditing, ImageStyleUI, ImageStyle, WidgetToolbarRepository, ImageToolbar, IndentEditing, IndentUI, Indent, IndentBlock, LinkUI, Link, ListEditing, List, MediaEmbedEditing, MediaEmbedUI, AutoMediaEmbed, MediaEmbed, PasteFromOffice, TableUtils, TableEditing, TableSelection, TableMouse, TableKeyboard, TableClipboard, Table, TableToolbar, TextTransformation]

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[FilipTokarski]

Hi, thanks for the report. I confirm this bug. What is worse here, if after Ctrl+A you press Backspace, editor crashes:

Uncaught TypeError: Cannot read property 'isCollapsed' of undefined
    at cn.hasContent (snippet.js:4)
    at snippet.js:4
    at snippet.js:4
    at cn.change (snippet.js:4)
    at Ke (snippet.js:4)
    at cn.deleteContent (snippet.js:4)
    at cn.<anonymous> (snippet.js:4)
    at cn.fire (snippet.js:4)
    at cn.<computed> [as deleteContent] (snippet.js:4)
    at Object.callback (snippet.js:4)

More info:

• crashes also with images and media embeds
• widget needs to be the last item inside the BlockQuote
• Chrome and Safari crash since 19.0.0 ( on previous versions selection is ok but Backspace does nothing )
• Firefox crashes even on 15.0.0