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README.md

Pasting analysis

Overview

Line breaks

  • Apple Pages Firefox / Safari macOS 10.13 / Safari iOS11 inserts invalid character "Soft line<?>break"
  • Dropbox Paper Safari iOS 11 "Soft ", "line break"
  • Google Docs Safari iOS 11, Word Safari iOS 11 "Soft", "Line break"
  • Apple Pages Chrome 62 macOS 10.13 "Soft line\n break"
  • Word Online Firefox 57, Safari 11, macOS 10.13 "Soft \nline break "
  • Word 2010 IE11 "Soft ", "line break".
  • Word 2010 Chrome 62, Firefox 57 – Word 2016 Chrome 63, Firefox 57, Edge 16 "Soft \n line break".
  • Dropbox Paper all browsers "Soft ", "line break".
  • Dropbox Paper Safari 11 - contains different whitespace character than for other browsers.
  • Dropbox Paper IE11 stripPastedStyles: "Soft ", "", "line break".
  • Google Docs all browsers "Soft\nLine break".
  • Google Docs IE11 stripPastedStyles: "Soft", "Line break"

List item prefixes

UL

Depth 0:

// Word 2010 / Word 2016
"· "
// Word 2010, IE11 (plain text)
"•\t"
// Dropbox Paper, IE11 (plain text)
"•"
// Word Safari iOS11
"\t"
// Image list, Word 2010 / Word 2016
"📷 "
// Image list, Word 2010, IE11 (plain text)
" \t"

Depth 1:

// Word 2010 / Word 2016
"o "
// Word 2010, IE11 (plain text)
"o\t"
// Dropbox Paper / Google Docs, IE11 (plain text)
"◦"
// Word Safari iOS11
"\t"

Depth 2:

// Word 2010 / Word 2016
"§ "
// Word 2010, IE11 (plain text)
"\t"
// Dropbox Paper / Google Docs, IE11 (plain text)
"◾"
// Word Safari iOS11
"\t"

OL

Depth 0:

// Word 2010 / Word 2016
"1. "
// Word 2010, IE11 (plain text)
"1.\t"
// Dropbox Paper / Google Docs, IE11 (plain text)
"1."

Depth 1:

// Word 2010 / Word 2016
"a. "
// Word 2010, IE11 (plain text)
"a.\t"
// Dropbox Paper / Google Docs, IE11 (plain text)
"a."

Depth 2:

// Word 2010 / Word 2016
"i. "
// Word 2010, IE11 (plain text)
"i.\t"
// Dropbox Paper / Google Docs, IE11 (plain text)
"i."

By word processor

Draft.js

Pasting from Draft.js to Draft.js

Same editor

  • All formatting is preserved as-is.
  • Entity ranges refer to the same entities multiple times.

Different editors

  • Successive unstyled blocks are concatenated into a single block.
  • CODE style is not preserved.
  • LINK entities are not preserved.
  • List nesting is not preserved.
  • Line breaks are not preserved.
  • IMAGE entity is inserted with 📷 character.

Word 2010

Highly similar between Chrome 62 and Firefox 57.

  • Title, Subtitle -> unstyled.
  • Bold, Italic, Strikethrough, Underline -> BOLD, ITALIC, STRIKETHROUGH, UNDERLINE.
  • Bigger, smaller, superscript, subscript, monospace -> unstyled.
  • Text color, background color -> unstyled.
  • Small caps -> lowercase unstyled.
  • Outline -> BOLD.
  • Double strikethrough -> STRIKETHROUGH.
  • Emphasis -> ITALIC.
  • Light emphasis, intense emphasis, quote, intense quote, light ref, intense ref, book title -> unstyled.
  • Left, right, center, justify, indent -> unstyled.
  • Page link -> LINK with href, url.
  • Filter href attribute on LINK.
  • Email link -> LINK with href, url, eg. mailto:test@example.com.
  • Link tooltip -> LINK with title attribute.
  • Potentially filter out title attribute on LINK if unsupported.
  • Internal link -> LINK with "href": "#_Inline_styles", "url": "http://localhost/#_Inline_styles".
  • Firefox 57 - Internal link -> unstyled, no LINK.
  • Remove internal links based on href starting with #.
  • Frame link -> LINK with href, url.
  • Comment -> LINK with "href": "#_msocom_1", "http://localhost/#_msocom_1", and [T.C1] text appended after the commented content.
  • Comment -> also adding unstyled block for comment text at the end of the document, preceded with [T.C1]: "text": "[T.C1]Comment". And LINK with "href": "#_msoanchor_1", "url": "http://localhost/#_msoanchor_1".
  • Remove comment LINK based on href attribute.
  • [ ] Potentially also remove inserted text, if feasible.
  • Heading 1, Heading 2, Heading 3, Heading 5, Heading 6, Heading 8 -> correct header-* level.
  • Heading 7, Heading 8, Heading 9 -> unstyled.
  • Bullet list -> unstyled prefixed with · (depth 0), o, § (depth 1 & 2).
  • Number list prefixed with 1. (depth 0), a., i. (depth 1 & 2).
  • Star list -> unstyled prefixed with 📷, and IMAGE entity with "alt": "*" "height": "15", "width": "15", "src": "file:///C:\\truncated\\msohtmlclip1\\01\\clip_image001.gif".
  • Remove image entities and their text when src uses file:/// protocol.
  • Unstyled with borders -> unstyled.
  • Image -> unstyled with entity applied to "📷" camera emoji.
  • Image -> IMAGE with file:/// for src, width and height.
  • Image caption -> unstyled after image block.
  • Table cells as separate unstyled blocks, eg. "text": "row 1 col 1",.
  • Styled code -> unstyled.
  • Line break -> Soft \n line break.
  • Emojis preserved.
  • Equation -> IMAGE with file:/// for src, width and height.
  • Shape -> IMAGE with file:/// for src, width and height.
  • SmartArt -> IMAGE with file:/// for src, width and height.
  • Chart -> IMAGE with file:/// for src, width and height.
  • WordArt -> unstyled block with whitespace text (multiple spaces).

IE11

  • The equation content makes the browser crash on copy-paste.
  • Rich paste is all in a single line
  • Advise users to turn on stripPastedStyles in their implementation with IE11 detection.

IE11 - stripPastedStyles

  • stripPastedStyles correctly separates the content.
  • Small caps -> uppercase.
  • Light ref, intense ref, book title -> uppercase.
  • Bullet list prefixed with •\t (depth 0), o\t, \t (depth 1 & 2).
  • Number list prefixed with 1.\t (depth 0), a.\t, i.\t (depth 1 & 2).
  • Star list prefixed with \t (depth 0), o\t, \t (depth 1 & 2).
  • Table columns separated with \t, eg. "text": "row 1 col 1\trow 1 col 2",.
  • Investigate equation block with single tab character "text": "\t".

Word 2016

Windows

  • With Word 2010 document, same as Word 2010 results in Chrome 63, Firefox 57, Edge 16. Also identical in IE11, except for the equation crash.
  • With Word 2016 (macOS) document, same as Word 2010 results in Chrome 63, Firefox 57, Edge 16. Also identical in IE11, except for the equation crash.

Google Docs

Same behavior in Firefox 57 Win 8.1 & macOS 10.13, Chrome 62 Win 8.1 & macOS 10.13, Safari 11, Edge 16 Win 10 unless specified.

  • Title, Subtitle -> unstyled.
  • Bold, Italic, Strikethrough, Underline -> BOLD, ITALIC, STRIKETHROUGH, UNDERLINE.
  • Bigger, smaller, superscript, subscript, colored text, background text -> unstyled.
  • Page link -> LINK with href, url.
  • Page link -> UNDERLINE applied where link is.
  • Bookmark link -> LINK with href, url with reference as URL hash, eg. #heading=h.h40mjmbsff92
  • Bookmark link -> UNDERLINE applied where link is.
  • Comment -> unstyled, no comment text
  • Left, right, center, justify, indent -> unstyled.
  • Heading 1, Heading 2, Heading 3, Heading 5, Heading 6, Heading 8 -> correct header-* level.
  • Bullet list -> unordered-list-item
  • Nested bullet list -> unordered-list-item at correct depth.
  • Numbered list -> ordered-list-item
  • Nested numbered list -> ordered-list-item at correct depth.
  • Star list -> unordered-list-item
  • Nested star list -> unordered-list-item at correct depth.
  • Unstyled with borders -> unstyled.
  • Image -> unstyled with entity applied to "📷" camera emoji.
  • Image -> IMAGE with src pointing to Google Docs (CDN, *.googleusercontent.com), height, width.
  • Potentially filter hotlinked IMAGE entities?
  • Image wrap text -> IMAGE with camera emoji followed by soft line break (\n).
  • Safari 11, Chrome 62 - wrap text IMAGE has BOLD style applied.
  • Table cell -> one unstyled block per cell.
  • Horizontal line -> nothing.
  • Styled code -> unstyled.
  • Soft line break -> "Soft\nLine break"
  • Emojis preserved
  • Drawing -> IMAGE with src pointing at docs.google.com/drawings.
  • Chart -> IMAGE with src pointing at *.googleusercontent.com.
  • Bookmark -> unstyled.

IE11

  • Rich paste is all in a single line
  • Advise users to turn on stripPastedStyles in their implementation with IE11 detection.

IE11 - stripPastedStyles

  • Soft line break -> "Soft", "Line break"

Dropbox Paper

Same behavior in Firefox 57 Win 8.1 & macOS 10.13, Chrome 62 Win 8.1 & macOS 10.13, Safari 11, Edge 16 Win 10 unless specified.

  • Title -> header-one
  • Bold, Italic, Strikethrough, Underline -> BOLD, ITALIC, STRIKETHROUGH, UNDERLINE.
  • Code -> unstyled
  • Comment -> unstyled with comment text added after comment position.
  • Page link -> LINK with href, url, "rel": "noreferrer nofollow noopener",, "target": "_blank",.
  • Mention -> LINK with href, url pointing at user profile /ep/profile/iX86truncated.
  • Safari 11 - Mention link -> unstyled, no entity
  • Safari 11, Firefox 57 - Mention link -> href and url are absolute path /ep/profile/iX86truncated.
  • Edge 16 - Mention link -> href is full URL, https://paper.dropbox.com/ep/profile/iX86truncated.
  • Chrome 62 - Mention link -> href is absolute path /ep/profile/iX86truncated, url is full URL, "url": "http://localhost/ep/profile/iX86truncated".
  • Dropbox paper link -> LINK with href, url.
  • Heading one, heading two -> header-one, header-two
  • Heading three -> unstyled
  • Bullet list -> unordered-list-item
  • Nested bullet list -> unordered-list-item at correct depth.
  • Numbered list -> ordered-list-item
  • Nested numbered list -> ordered-list-item at correct depth.
  • Action list -> unordered-list-item
  • Nested action list -> unordered-list-item at correct depth.
  • Image, table, section break -> all concatenated into a single unstyled block.
  • Table cells separated by nothing.
  • Section break -> nothing
  • Image -> unstyled with entity applied to "📷" camera emoji.
  • Image -> IMAGE with src pointing to Dropbox Paper (CDN, https://d2mxuefqeaa7sj.cloudfront.net/).
  • Potentially filter hotlinked IMAGE entities?
  • Code block -> code-block, one block per line.
  • Code block -> CODE style applied on each line.
  • Remove CODE style in code-block?
  • Soft line break -> "Soft ", "line break".
  • Safari 11 - Soft line break contains different whitespace character than for other browsers.
  • Emojis -> converted to IMAGE with src pointing to Dropbox Paper (https://paper.dropboxstatic.com/static/img/ace/emoji/), alt describing the emoji, "height": "16".
  • Dropbox document link, Trello card, YouTube video, GitHub Gist -> all concatenated into a single unstyled block, all with URL in-text and LINK entity pointing at source.

IE11

Unsupported, warning message displayed but document still partially renders.

  • Rich paste is all in a single line
  • Advise users to turn on stripPastedStyles in their implementation with IE11 detection.

IE11 - stripPastedStyles

  • Bullet list prefixed with • (depth 0), ◦, ◾ (depth 1 & 2).
  • Number list prefixed with 1. (depth 0), a., i. (depth 1 & 2).
  • Action list prefixed with empty space at all depth levels.
  • Section break -> unstyled with "text": "--------------------------------------------------------------------------------",.
  • Soft line break -> "Soft ", "", "line break"

Apple Pages

  • Paste is identical, plain text, in Safari and Firefox

Chrome 62 macOS 10.13

  • Bold, italic -> BOLD, ITALIC
  • Strikethrough, monospace, underline, outline, bigger, smaller, superscript, subscript -> unstyled.
  • Small caps -> lowercase unstyled.
  • Red, text background, shadow -> unstyled
  • Emphasis -> BOLD.
  • Page link -> LINK with href, url.
  • Filter href attribute on LINK.
  • Email link -> LINK with href, url, eg. mailto:test@example.com?subject=subject.
  • [ ] Allows setting mail subject. Keep or discard?
  • Bookmark link -> unstyled.
  • Comment -> unstyled.
  • Bold + link + comment -> link only.
  • Title, Heading 1, Heading 2 -> unstyled with BOLD.
  • Heading 3 -> unstyled
  • Bullet list -> unordered-list-item
  • Nested bullet list -> empty unstyled at current depth, then unordered-list-item at correct depth.
  • Numbered list -> ordered-list-item
  • Nested numbered list -> empty unstyled at current depth, then ordered-list-item at correct depth.
  • Dashed list -> unordered-list-item
  • Nested dashed list -> empty unstyled at current depth, then unordered-list-item at correct depth.
  • Image list -> unordered-list-item
  • Nested image list -> empty unstyled at current depth, then unordered-list-item at correct depth.
  • Remove non-list blocks with depth not 0.
  • Image -> nothing
  • Table -> unstyled block per cell, separated by single-space unstyled blocks.
  • Line -> nothing
  • Styled code -> BOLD where syntax highlighting matched bold.
  • Soft line break has invalid character "Soft line<?>break"
  • [ ] Remove invalid soft line break character inserted by Apple Pages.
  • Emojis preserved
  • MathML equation -> nothing
  • LaTeX equation -> formula as unstyled.
  • Chart, Shape, Audio media, Video media -> nothing
  • Highlight -> unstyled

Word Online

Same behavior in Chrome 62, Safari 11, Firefox 57, Edge 16. Win 8.1, Win 10, macOS 10.13.

  • All block text ends with one empty space (" ").
  • Title, Subtitle -> unstyled.
  • Bold, Italic, Strikethrough, Underline -> BOLD, ITALIC, STRIKETHROUGH, UNDERLINE.
  • Bigger, smaller, superscript, subscript -> unstyled.
  • Text color, background color -> unstyled.
  • Intense emphasis, quote, intense quote, subtle reference -> ITALIC.
  • Intense reference, book title -> BOLD.
  • Page link -> LINK with href, url, rel="noreferrer", target="_blank".
  • Page link -> UNDERLINE applied where link is.
  • Filter href attribute on LINK.
  • Filter rel attribute on LINK.
  • Filter target attribute on LINK.
  • Comment -> unstyled.
  • Left, right, center, justify, indent, hanging, first line -> unstyled.
  • Heading 1, Heading 2, Heading 3, Heading 5, Heading 6, Heading 8 -> unstyled.
  • Heading 4, Heading 7, Heading 9 -> unstyled with ITALIC
  • Bullet list -> unordered-list-item
  • Nested bullet list -> non-nested unordered-list-item.
  • Numbered list -> ordered-list-item
  • Nested numbered list -> non-nested ordered-list-item.
  • Checkbox list -> unordered-list-item
  • Nested checkbox list -> non-nested unordered-list-item.
  • Image -> unstyled with entity applied to "📷" camera emoji.
  • Image -> IMAGE with data URI src, and alt if present.
  • Filter IMAGE entities using data URIs.
  • Image with text next to it -> unstyled with entity applied to "📷" and text in the same block.
  • Make sure blocks with image and more text are either split, or image is removed.
  • Styled code -> unstyled.
  • Emojis -> preserved but with BOLD applied.
  • Inline styles (ITALIC, BOLD) are split differently (and may be contiguous) between browsers.

IE11

Unsupported, document does not open.

iOS11

  • Paste is plain text only.
  • Emojis preserved

Word

  • Bullet list prefixed with \t, eg. "text": "\tBullet list", (regardless of depth).
  • Numbered list prefixed with \t, eg. "text": "\tNumber list", (regardless of depth).
  • Table columns separated with \t, eg. "text": "row 1 col 1\trow 1 col 2",.