[Webkit-unassigned] [Bug 191836] New: Content pasted from Excel does not preserve its structure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191836

            Bug ID: 191836
           Summary: Content pasted from Excel does not preserve its
                    structure
           Product: WebKit
           Version: Safari 12
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: vepomoc at gmail.com
                CC: wenson_hsieh at apple.com

Created attachment 355278

  --> https://bugs.webkit.org/attachment.cgi?id=355278&action=review

Excel file used for tests

Content from Excel pasted into [contenteditable] area has all metadata stripped off, making it impossible to detect the source of the content.

In Safari only the table element is available in DataTransfer object: https://gist.github.com/Comandeer/e0226ec9908a6a1fdf9b0204eacfa84f
In case of Firefox and Chrome, the whole structure of HTML is preserved: https://gist.github.com/Comandeer/8909ffa0c93caadc88220f91ab72ad88

As it can be seen, Chrome and Firefox gives access to the whole HTML document, allowing to fetch metadata from its head section. Safari however gives access only to body section, which disables the ability to fetch useful metadata (e.g. about the generator of content or the author) and additional styles.

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